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Performance and enhanced oil recovery efficiency of an acid-resistant polymer microspheres of anti-CO_(2) channeling in low-permeability reservoirs
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作者 Hai-Zhuang Jiang Hong-Bin Yang +5 位作者 Ruo-Sheng Pan Zhen-Yu Ren Wan-Li Kang Jun-Yi Zhang Shi-Long Pan Bauyrzhan Sarsenbekuly 《Petroleum Science》 SCIE EI CAS CSCD 2024年第4期2420-2432,共13页
CO_(2) flooding is a vital development method for enhanced oil recovery in low-permeability reservoirs,However,micro-fractures are developed in low-permeability reservoirs,which are essential oil flow channels but can... CO_(2) flooding is a vital development method for enhanced oil recovery in low-permeability reservoirs,However,micro-fractures are developed in low-permeability reservoirs,which are essential oil flow channels but can also cause severe CO_(2) gas channeling problems.Therefore,anti-gas channeling is a necessary measure to improve the effect of CO_(2) flooding.The kind of anti-gas channeling refers to the plugging of fractures in the deep formation to prevent CO_(2) gas channeling,which is different from the wellbore leakage.Polymer microspheres have the characteristics of controllable deep plugging,which can achieve the profile control of low-permeability fractured reservoirs.In acidic environments with supercritical CO_(2),traditional polymer microspheres have poor expandability and plugging properties.Based on previous work,a systematic evaluation of the expansion performance,dispersion rheological properties,stability,deep migration,anti-CO_(2) channeling and enhanced oil recovery ability of a novel acid-resistant polymer microsphere(DCNPM-A)was carried out under CQ oilifield conditions(salinity of85,000 mg/L,80℃,pH=3).The results show that the DCNPM-A microsphere had a better expansion performance than the traditional microsphere,with a swelling rate of 13.5.The microsphere dispersion with a concentration of 0.1%-0.5%had the advantages of low viscosity,high dispersion and good injectability in the low permeability fractured core.In the acidic environment of supercritical CO_(2),DCNPM-A microspheres showed excellent stability and could maintain strength for over 60 d with less loss.In core experiments,DCNPM-A microspheres exhibited delayed swelling characteristics and could effectively plug deep formations.With a plugging rate of 95%,the subsequent enhanced oil recovery of CO_(2) flooding could reach 21.03%.The experimental results can provide a theoretical basis for anti-CO_(2)channeling and enhanced oil recovery in low-permeability fractured reservoirs. 展开更多
关键词 Low-permeability reservoir Anti-CO_(2)channeling polymer microsphere Acid resistance
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Research Progress on the Preparation of Inorganic/Natural Materials Composite Microspheres
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作者 Jing Cao Chaojie Feng Wen Duan 《Expert Review of Chinese Chemical》 2024年第1期15-20,共6页
Microspheres are a new type of drug carrier with great potential for development and application.Natural polymers have good biocompatibility,biodegradability,and are easily dispersed in living organisms,making them su... Microspheres are a new type of drug carrier with great potential for development and application.Natural polymers have good biocompatibility,biodegradability,and are easily dispersed in living organisms,making them suitable for preparing microspheres.Inorganic materials(mainly inorganic minerals)have excellent mechanical properties and are inexpensive and easy to obtain.Through the coupling and hybridization of natural polymers and inorganic materials,they can complement each other's advantages and synergistically enhance efficiency,resulting in many excellent physical and chemical properties.Inorganic materials/natural polymer composite microspheres can be prepared by modifying natural polymers with inorganic materials through various methods such as emulsification crosslinking,solution mixing,in-situ synthesis,extrusion,etc.The application of inorganic materials/natural polymer composite microspheres in drug delivery systems has significant sustained-release effects,is safe and non-toxic,and the cost of carrier materials is relatively low,which has certain significance for the development of new drug carriers.This article reviews the recent research on the preparation,drug loading and release properties of inorganic material/natural polymer composite microspheres,analyzes the advantages and disadvantages of commonly used preparation methods,and looks forward to the development direction of composite microspheres. 展开更多
关键词 natural polymer materials composite microspheres PREPARATION research progress
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SYNTHESIS OF MONODISPERSE HOLLOW POLYMER MICROSPHERES WITH FUNCTIONAL GROUPS BY DISTILLATION PRECIPITATION POLYMERIZATION 被引量:4
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作者 杨新林 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2010年第2期277-285,共9页
Monodisperse hollow polymer microspheres having various functional groups on the shell-layer, such as carboxylic acid, pyridyl and amide, were prepared by two-stage distillation precipitation polymerization in neat ac... Monodisperse hollow polymer microspheres having various functional groups on the shell-layer, such as carboxylic acid, pyridyl and amide, were prepared by two-stage distillation precipitation polymerization in neat acetonitrile in the absence of any stabilizer or additive, during which monodisperse poly(methacrylic acid) (PMAA) afforded from the first-stage polymerization was utilized as the seeds for the second-stage polymerization. The shell layer with different functional groups was formed during the second-stage copolymerization of either divinylbenzene (DVB) or ethyleneglycol dimethacrylate (EGDMA) as crosslinker and the functional comonomers, in which the hydrogen-bonding interaction between the carboxylic acid group of PMAA core and the functional groups of the corresponding comonomers, including carboxylic acid, amide and pyridyl, played an essential role for the formation of monodisperse core-shell functional microspheres. The hollow polymer microspheres were then developed after the subsequent removal of PMAA cores by dissolution in ethanol under basic condition. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to determine the morphology of the resultant PMAA core, functional core-shell microspheres and the corresponding hollow polymer microspheres with different functional groups. FT-IR spectra confirmed the successful incorporation of the various functional groups on the shell layer of the hollow polymer microspheres. 展开更多
关键词 Hollow polymer microsphere Distillation precipitation polymerization Functional microsphere Hydrogen- bonding interaction.
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A review of recent progress in preparation of hollow polymer microspheres 被引量:3
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作者 Wei Bin Wang Shujun +3 位作者 Song Hongguang Liu Hongyan Li Jie Liu Ning 《Petroleum Science》 SCIE CAS CSCD 2009年第3期306-312,共7页
The preparation methods of hollow polymer microspheres both at home and abroad are summarized, and their preparation mechanisms and developmental states are presented. These methods include the liquid droplet method, ... The preparation methods of hollow polymer microspheres both at home and abroad are summarized, and their preparation mechanisms and developmental states are presented. These methods include the liquid droplet method, dried-gel droplet method, self-assembly method, microencapsulation method, emulsion polymerization method and the template method. Hollow polystyrene microspheres are the most extensively studied in the research of hollow polymer microspheres. Through comparison of the advantages and disadvantages of different preparation methods, it is concluded that microencapsulation method is most suitable for preparing polystyrene hollow microspheres. 展开更多
关键词 Preparation methods hollow polymer microspheres preparation mechanism polystyrene hollow microspheres microencapsulation method
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Immobilization of penicillin G acylase on paramagnetic polymer microspheres with epoxy groups 被引量:7
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作者 Xing Chen Lu Yang +5 位作者 Wangcheng Zhan Li Wang Yun Guo Yunsong Wang Guanzhong Lu Yanglong Guo 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第1期47-53,共7页
Paramagnetic polymer microspheres were synthesized by the inverse suspension polymerizationmethod through polymerization of glycidyl methacrylate,ally glycidyl ether and methacrylamide onthe surface of silica‐coated ... Paramagnetic polymer microspheres were synthesized by the inverse suspension polymerizationmethod through polymerization of glycidyl methacrylate,ally glycidyl ether and methacrylamide onthe surface of silica‐coated Fe3O4nanoparticles using N,N’‐methylene‐bis(acrylamide)as across‐linking agent.Penicillin G acylase(PGA)was covalently immobilized on the surface of theparamagnetic microspheres by reacting the amino groups of the PGA molecules with the epoxygroups of the paramagnetic polymer microspheres.The effect of the SiO2coating and the amount ofparamagnetic Fe3O4nanoparticles on the initial activity and the operational stability of the immobilizedPGA was investigated.The results indicated that SiO2played an important role in the polymerization process and paramagnetic polymer microspheres with a SiO2‐coated Fe3O4nanoparticles mass content of7.5%are an optimal support material for PGA immobilization.Immobilized PGA on the paramagnetic polymer microspheres shows a high initial activity of430U/g(wet)and retains99%of its initial activity after recycling10times.Furthermore,immobilized PGA exhibits high thermal stability,pH stability and excellent reusability,which can be rapidly recycled by the aid of magnet.?2018,Dalian Institute of Chemical Physics,Chinese Academy of Sciences.Published by Elsevier B.V.All rights reserved. 展开更多
关键词 Paramagnetic polymer microspheres Epoxy groups Penicillin G acylase Covalent bonding IMMOBILIZATION
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PREPARATION OF MONODISPERSE CROSSLINKED POLYMER MICROSPHERES HAVING CHLOROMETHYL GROUP BY DISTILLATIONPRECIPITATION POLYMERIZATION 被引量:2
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作者 Shu-FengLi Xin-LinYang Wen-QiangHuang 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2005年第2期197-202,共6页
Monodisperse crosslinked poly(chloromethylstyrene-co-divinylbenzene)(poly(CMSt-co-DVB))microsphereswere prepared by distillation-precipitation copolymerization of chloromethylstyrene(CMSt)and divinylbenzene(DVB)inneat... Monodisperse crosslinked poly(chloromethylstyrene-co-divinylbenzene)(poly(CMSt-co-DVB))microsphereswere prepared by distillation-precipitation copolymerization of chloromethylstyrene(CMSt)and divinylbenzene(DVB)inneat acetonitrile.The polymer particles had clean surfaces due to the absence of any added stabilizer.The size of the particlesranges from 2.59 μm to 3.19 μm and with mono-dispersity around 1.002-1.014.The effects of monomer feed incopolymerization on the microsphere formation were described.The polymer microspheres were characterized by SEM andchlorinity elemental analysis. 展开更多
关键词 Chloromethylstyrene DIVINYLBENZENE Distillation-precipitation polymerization CROSSLINKED MONODISPERSE polymer microspheres Chlorinity.
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Preparation and Characterization of Non-porous Superparamagnetic Microspheres with Epoxy Groups by Dispersion Polymerization 被引量:4
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作者 马志亚 官月平 +1 位作者 刘先桥 刘会洲 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2005年第2期239-243,共5页
Non-porous superparamagnetic polymer microspheres with epoxy groups were prepared by dispersion polymerization of glycidyl methacrylate (GMA) in the presence of magnetic iron oxide (Fe3O4) nanoparticles coated with ol... Non-porous superparamagnetic polymer microspheres with epoxy groups were prepared by dispersion polymerization of glycidyl methacrylate (GMA) in the presence of magnetic iron oxide (Fe3O4) nanoparticles coated with oleic acid. The polymerization was carried out in the ethanol/water medium using polyvinylpyrrolidone (PVP) and 2,2’-azobisisobutyronitrile (AIBN) as stabilizer and initiator, respectively. The magnetic microspheres obtained were characterized with scanning electron microscopy (SEM), vibrating sample magnetometry (VSM) and Fourier transform infrared spectroscopy (FTIR). The results showed that the magnetic microspheres had an average size of-1μm with superparamagnetic characteristics. The saturation magnetization was found to be 4.5emu.g-1. There was abundance of epoxy groups with density of 0.028 mmol·g^-1 in microspheres. The magnetic PGMA microspheres have extensive potential uses in magnetic bioseparation and biotechnology. 展开更多
关键词 polyglycidyl methacrylate magnetic polymer microsphere dispersion polymerization epoxy groups BIOSEPARATION
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An efficient preparation of porous polymeric microspheres by solvent evaporation in foam phase 被引量:2
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作者 Yang Yu Guiying Li +5 位作者 Wanqing Han Linhua Zhu Tian Si HongWang Yanlin Sun Yanping He 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第1期409-416,共8页
This paper reports an efficient method of preparing porous polymeric microspheres by solvent evaporation in foam phase,in which phase separation between polymer and porogen occurs in foam phase instead of that in wate... This paper reports an efficient method of preparing porous polymeric microspheres by solvent evaporation in foam phase,in which phase separation between polymer and porogen occurs in foam phase instead of that in water phase by using the traditional solvent eva poration method.The method provides outstanding features,including being time-saving,of high-yield and able for continuous production,in which formation of porous polymeric microspheres finished within 3 min with a high production yield up to approximate 95 wt% and the process was able to be developed into a continuous process for production of porous polymeric microspheres.It was also universal to non-crosslinked polymers since the method is a development on the traditional emulsion solvent evaporation method.The new method is efficient and can be used potentially on the industrial scale for continuous production of porous polymeric microsphere s. 展开更多
关键词 Continuous process Foam phase High-yield polymer microsphere Solvent evaporation Time-saving
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PREPARATION OF POLYMER MICROSPHERES WITH PYRIDYL GROUP AND THEIR STABILIZED GOLD METALLIC COLLOIDS 被引量:1
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作者 Shu-ning Li Xin-lin Yang Wen-qiang Huang 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2007年第6期555-563,共9页
Narrow disperse poly(ethyleneglycol dimethacrylate-co-4-vinylpyridine) (poly(EGDMA-co-4-VPy)) microspheres were prepared by distillation-precipitation copolymerization of ethyleneglycol dimethacrylate (EGDMA) ... Narrow disperse poly(ethyleneglycol dimethacrylate-co-4-vinylpyridine) (poly(EGDMA-co-4-VPy)) microspheres were prepared by distillation-precipitation copolymerization of ethyleneglycol dimethacrylate (EGDMA) and 4-vinylpyridine (4-VPy) with 2,2'-azobisisobutyronitrile (AIBN) as initiator in neat acetonitrile. The polymer microspheres containing pyridyl group were then utilized as stabilizer for gold metallic colloids with the diameter around 7 nm, which were prepared by the in situ reduction of gold chloride trihydrate with sodium borohydride through the coordination of the pyridyl group on the gel layer and surface of the microsphere with the gold metallic nano-particles. The catalytic properties of the pyridyl- functionalized microsphere-stabilized gold metallic colloids and the behavior of the stabilized-catalyst for the recycling were investigated with reduction of 4-nitrophenol to 4-aminophenol as a model reaction. 展开更多
关键词 polymer microsphere Distillation-precipitation polymerization Pyridyl group Gold metallic colloids Catalysis.
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Fabrication of Microspheres Based on Poly(4-butyltriphenylamine) Blends with Poly(methyl methacrylate) and Block Copolymer by Solvent Evaporation Method 被引量:1
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作者 Hossein Taherzadeh Kenji Ogino 《Open Journal of Organic Polymer Materials》 2015年第2期37-42,共6页
Micron-sized polymer particles from single poly(4-butyltriphenylamine) (PBTPA) homopolymer, binary polymer blend [PBTPA/poly(methyl methacrylate) (PMMA)], and ternary polymer blend (PBTPA/PBTPA-b-PMMA/PMMA) via a solv... Micron-sized polymer particles from single poly(4-butyltriphenylamine) (PBTPA) homopolymer, binary polymer blend [PBTPA/poly(methyl methacrylate) (PMMA)], and ternary polymer blend (PBTPA/PBTPA-b-PMMA/PMMA) via a solvent evaporation method, and the surface morphologies and inside structure of resulting particles were investigated. Spherical homopolymer particles with smooth surface were resulted from PBTPA with low molecular weight. In the case of binary blends (PBTPA/PMMA = 1/1), Janus (low molecular weight) and dumbbell (high molecular weight) type morphologies were observed. The particles based on ternary blends containing PBTPA-b-PMMA showed core-shell type morphologies (PMMA;core, PBTPA;shell). Degree of engulfment of PMMArich domain increased with the content of the block copolymer. The decrease of domain size was not observed although the block copolymer had a suitable structure as a compatibilizer for the blend. It was also found that the initial concentration of polymer solution had an effect on the final morphology. 展开更多
关键词 microsphere Morphology polymer Blend Block Copolymer Poly(4-butyltriphenylamine)
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Characterization of Fe_3O_4/P(St-MPEO) Amphiphilic Magnetic Polymer Microspheres
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作者 CHAN ALBERT S. C. YIP C. W. 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2002年第4期458-461,共4页
Amphiphilic magnetic microspheres consisting of styrene and poly(ethylene oxide) macromonomer(MPEO) were prepared by dispersion copolymerization in the presence of Fe_3O_4 magnetic fluid in an ethanol/water medium. Th... Amphiphilic magnetic microspheres consisting of styrene and poly(ethylene oxide) macromonomer(MPEO) were prepared by dispersion copolymerization in the presence of Fe_3O_4 magnetic fluid in an ethanol/water medium. The sizes of the magnetic microspheres and their distribution were characterized by means of scanning electron microscopy(SEM). The surface morphology and the average surface roughness of the microspheres were investigated by virtue of atomic force microscopy(AFM). It was found that the microspheres exhibit microscopic phase-separate and the mean square surface roughness of the microspheres increases with increasing MPEO used in the copolymerization. The amphiphilic magnetic microspheres containing 0 4-3 5 mg/g hydroxyl groups could be prepared from MPEO with different concentrations and styrene. 展开更多
关键词 Amphiphilic magnetic polymer microspherE COpolymerIZATION
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Formulation of Domperidone Microspheres Using a Combination of Locally Extracted Chitosan and Hpmc as Polymers
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作者 Stephen Olaribigbe Majekodunmi Cynthia Chibuzor Uzoaganobi 《Journal of Chemistry and Chemical Engineering》 2017年第2期65-74,共10页
Abstract: Commercially available domperidone -a D2 receptor antagonist- is an immediate release formulation which has never been formulated into microspheres for sustained release. The present work aims towards study... Abstract: Commercially available domperidone -a D2 receptor antagonist- is an immediate release formulation which has never been formulated into microspheres for sustained release. The present work aims towards studying the effect of combination of a natural chitosan from an oyster shell of Mystilis edulis and HPMC (hydroxy propyl methyl cellulose) (spectracel 15 E) as polymer and tripolyphosphate as cross linking agent using wet gelation technique. The various polymer combination ratios for different batches were compared with a low molecular weight standard chitosan. The extracted chitosan - HPMC polymer combination ratios were chosen at ten levels: as batches B1, B2, B3, B4, B5, B6, B7, B8, B9, B10 for 1:1, 1:2, 2:1, 1:0, 0:1, 3:1, 1:3, 5:1, and 1:5 and 1:1 having 450:450, 300:600, 600:300, 900:0, 0:900, 675:225, 225:675, 750:150, 150:750, 450:450 mg respectively, while the quantity of domperidone and tripolyphosphate remained constant. B 11 and B 12 were formulated with standard chitosan and HPMC. The percentage yield of the formulated microspheres was determined and then evaluated for flowability, drug entrapment efficiency, drug release and mechanism of drug release by Fickian diffusion. The best batches of the domperidone loaded microspheres produced from the combination polymer were compared with the standard chitosan. The highest yields of microspheres were given by batches B12, B11, B10, and B4 with values of 50.1 ± 0.1%, 49.6 ± 0.1%, 46.6 :± 0.1%, and 46.1 ± 0.0% respectively while the lowest yield were 23.3 ± 0.2% and 23.6 ± 0.2%. B5 and B6 and B9 did not yield any microsphere. The bulk density, tapped density, compressibility and Hausner's ratio of the microspheres showed good flowability and high percent compressibility. The drug entrapment efficiency showed that the entrapment ranged from 54.2 to 97.2, where the least entrapment was B4 (54.2 ± 0.1) and the highest B12 (97.2 ± 0.2). The polymer surface of the microspheres as observed by SEM (scanning electron microscopy) was heterogeneous and porous which offers enhanced bioadhesivity. The dissolution study was used to determine the percentage drug release which ranged from 12.1% to 68.9% after 5 hours. Batches 1, 2, 3, 4, 7, and I 1 follow zero order kinetics via Fickian diffusion. The results indicate that microspberes of domperidone could be successfully formulated with a natural chitosan either alone or in combination with HPMC for sustained delivery of domperidone. Furthermore, the concentration of the natural polymer and HPMC employed in the formulation need to be carefully selected to enable the production of microspheres with the desired sustained release properties. 展开更多
关键词 DOMPERIDONE HPMC polymer combination microspheres wet gelation technique.
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Morphology Control of Polymer Microspheres Containing Block Copolymers with Seed Polymerization
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作者 Hossein Taherzadeh Shunsuke Sotowa Kenji Ogino 《Open Journal of Organic Polymer Materials》 2015年第2期43-50,共8页
Microspheres based on binary polymer blend consisting of polystyrene (PSt), poly (methyl methacrylate) (PMMA), block copolymer comprising PSt and PMMA subunits, and ternary polymer blend consisting of PSt, PMMA, and b... Microspheres based on binary polymer blend consisting of polystyrene (PSt), poly (methyl methacrylate) (PMMA), block copolymer comprising PSt and PMMA subunits, and ternary polymer blend consisting of PSt, PMMA, and block copolymer were fabricated by a solvent evaporation method, in which a polymer solution in dichloromethane was dispersed in water phase with the aid of a homogenizer to obtain an O/W emulsion followed by solvent evaporation with agitation to solidify the polymer. In the case of ternary blend, the effect of block copolymer content on the morphology of resulting spheres was investigated. Ternary blends afforded the bi-compartmental morphologies, the intermediate morphology between Janus and core-shell, which was confirmed by TEM observation. Seed polymerization of St or MMA was also carried out utilizing the resulting microspheres as seed particles in order to control the shape, and the surface morphology of particles. The particles with snowman-like morphology were obtained by seed polymerization of St using PSt/PMMA binary blend microspheres as seed particles. Surface roughness was controlled by the polymerization of MMA in the block copolymer seed, and that of St in the ternary blend seed. 展开更多
关键词 microspherE Morphology polymer BLEND BLOCK COpolymer SEED polymerIZATION
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Local immunotherapy with interleukin - 2 delivered from biodegradable polymer microspheres combined with interstitial chemotherapy: a novel treatment for experimental malignant glioma.
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作者 Rhines LD DiMeco F +4 位作者 Lawson HC Tyler BM Hanes J Olivi A Brem H 《中国神经肿瘤杂志》 2003年第2期81-81,共1页
OBJECTIVE:Local delivery of carmustine(BCNU)from biodegradablepolymers prolongs survival against experi-mental brain tumors.Moreover,paracrine administration of interleukin-2(IL-2)has been shown to elicit apotent anti... OBJECTIVE:Local delivery of carmustine(BCNU)from biodegradablepolymers prolongs survival against experi-mental brain tumors.Moreover,paracrine administration of interleukin-2(IL-2)has been shown to elicit apotent antitumor immune response and to improve survival in animal brain tumor models.We report the use of anovel polymeric microsphere delivery vehicle to release IL-2.We demonstrate both in vitro release of cytokinefrom the microspheres and histological evidence of the inflammatory response elicited by IL-2 released from themicrospheres in the rat brain.Thees microspheres are used to deliver IL-2,and biodegradable polymer wafers 展开更多
关键词 BCNU Local immunotherapy with interleukin from delivered from biodegradable polymer microspheres combined with interstitial chemotherapy a novel treatment for experimental malignant glioma for with
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Porous polymer microsphere functionalized with benzimidazolium based ionic liquids as effective solid catalysts for esterification 被引量:1
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作者 Xiaomei Ling Yiwei Xie +2 位作者 Xiaocheng Lin Ling Li Ting Qiu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第10期2455-2466,共12页
To prepare polymer supported ionic liquids(PSILs)as effective catalysts for esterification,the free radical suspension copolymerization of vinylbenzyl chloride(VBC,monomer),styrene(St,monomer)and divinylbenzene(DVB,cr... To prepare polymer supported ionic liquids(PSILs)as effective catalysts for esterification,the free radical suspension copolymerization of vinylbenzyl chloride(VBC,monomer),styrene(St,monomer)and divinylbenzene(DVB,crosslinker)with the addition of n-heptane(porogen)was carried out for the fabrication of the porous polymer(PVD)microsphere as support,followed by the immobilization of sulfonic acid-functionalized ionic liquids by the successive treatment of benzimidazole(BIm),1,3-propane sultone and sulfuric acid(H2SO4)or trifluoromethanesulfonic acid(CF3SO3H).The effects of the compositions of DVB and n-heptane on the internal structure of the polymer supports were investigated,and it was found that the support with 40 wt%DVB and 60 wt%n-heptane(with relative to the monomer)could endow the final PSILs with the relatively optimal catalytic performance.The preliminary experiment in the batch reactor indicated that PSILs herein exhibited higher catalytic activities than commercial Amberlyst 46 resin for the esterification of propanoic acid(PROAc)with n-propanol(PROOH).Consequently,the optimal PSILs catalyst,PVD-[Bim-SO3H]HSO4,was selected for further study in the batch reactive distillation column because of low cost and its ease of preparation.The yield of propyl ropionate(PROPRO)could reach up to 97.78%at the optimized conditions of PROOH/PROAc molar ratio(2:1)and catalyst dosage(2.0 wt%).The investigation of the reaction kinetic manifested that the calculated results of second order pseudo-homogeneous kinetic model were in good agreement with experimental values.The pre-exponential factor and activation energy were 4.12×107 L·mol-1·min-1 and 60.57 k J·mol-1,respectively.It is worth noting that the PSILs catalyst could be simply recovered and reused with relatively satisfactory decrease in the catalytic activity,which made it an environmental friendly and promising catalyst in the industrial application. 展开更多
关键词 Supported ionic liquids Porous polymer microspherE COpolymerIZATION ESTERIFICATION Reactive DISTILLATION
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Immobilization of β-Cyclodextrin as Insoluble β-Cyclodextrin Polymer and Its Catalytic Performance 被引量:2
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作者 江红果 杨祖金 +2 位作者 周贤太 方岩雄 纪红兵 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第4期784-792,共9页
Insoluble β-cyclodextrin polymers were prepared from β-cyclodextrin(β-CD) using epichlorohydrin(EPI) as crosslinking agent under basic conditions.The polymers were characterized by Fourier Transform Infrared(FTIR),... Insoluble β-cyclodextrin polymers were prepared from β-cyclodextrin(β-CD) using epichlorohydrin(EPI) as crosslinking agent under basic conditions.The polymers were characterized by Fourier Transform Infrared(FTIR),Thermogravimetry(TG),X-ray diffraction(XRD) and TG-FTIR.The results demonstrated that the polym-erization between EPI and β-CD indeed occurred,and a number of CD rings were interconnected to form a three-dimensional network.Moreover,different factors influencing the polymerization,e.g.molar ratio of EPI to β-CD,the concentration of NaOH and reaction temperature,have been investigated.The polymer prepared under the optimal conditions(the molar ratio EPI:β-CD of 44,the NaOH concentration 50% in mass,and the temperature at 65 ℃) showed excellent thermal stability and insolubility in organic solvents or strong acid/base.In addition,the β-cyclodextrin polymers also presented high catalytic activity for aqueous oxidation of benzyl alcohol with hy-pochlorite as oxidant. 展开更多
关键词 β-cyclodextrin polymers EPICHLOROHYDRIN polymerIZATION catalytic activity
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Ionic liquids functionalized β-cyclodextrin polymer for separation/analysis of magnolol 被引量:2
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作者 Nan Zhou Xia-Shi Zhu 《Journal of Pharmaceutical Analysis》 SCIE CAS 2014年第4期242-249,共8页
Ionic liquids functionalized β-cyclodextrin polymer, a mono-6-deoxy-6-(1,2-dimethylimida- zolium)-β-cyclodextrin iodide polymer (ILs-β-CDCP), was synthesized as a solid-phase adsorbent coupled with high-perform... Ionic liquids functionalized β-cyclodextrin polymer, a mono-6-deoxy-6-(1,2-dimethylimida- zolium)-β-cyclodextrin iodide polymer (ILs-β-CDCP), was synthesized as a solid-phase adsorbent coupled with high-performance liquid chromatography for separating or analyzing magnolol in drug samples. The results showed that magnolol was adsorbed rapidly on ILs-D-CDCP and eluted with methanol. Under the optimum conditions, preconcentration factor of the proposed method was 12. The linear range, limit of detection (LOD), correlation coefficient (R) and relative standard deviation (RSD) were found to be 0.02-8.00 μg/mL, 1.9 ng/mL, 0.9992 and 2.76% (n=3, c=2.00 pg/mL), respectively. The interaction between 1Ls-])-CDCP and magnolol was studied through the inclusion constant, FTIR and TGA analysis. This proposed method has been successfully applied to the determination of magnolol in real samples. 展开更多
关键词 MAGNOLOL Ionic liquidsfunctionalized-β-cyclodextrin polymer Solid-phase extraction High-performance liquidchromatography
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Efficient recovery of aromatic compounds from the wastewater of styrene monomer and propylene oxide co-production plant via hypercrosslinked aryl-rich starch-β-cyclodextrin polymeric sorbent 被引量:1
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作者 Zhongwei Tan Xingguo Xu +6 位作者 Yu Wan Chengjun Kang Zhaoqiang Zhang Zhenxia Zhao Fang Shen Kungang Chai Hongbing Ji 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2022年第9期150-160,共11页
Adsorptive recovery of valuable components from industrial wastewater is highly desirable for avoiding resource wastage but remains a challenge.Herein,we develop an efficient continuous adsorption process for recoveri... Adsorptive recovery of valuable components from industrial wastewater is highly desirable for avoiding resource wastage but remains a challenge.Herein,we develop an efficient continuous adsorption process for recovering aromatic compounds in wastewater from styrene monomer and propylene oxide coproduction(SMPO)plant.Based on our insight into the potential of bio-based porous materials for adsorption application,starch-graft-polystyrene(SPS)and aryl-modifiedβ-cyclodextrin(ACD)were prepared,and novel hypercrosslinked porous polymers combined SPS with ACD(HSPS-ACDs)were synthesized through external crosslinking approach.In a binary-component system,the best-performing one HSPS-ACD(H)with high ACD content and large specific surface area possessed superior capacities for the representative aromatic compounds,acetophenone(AP,2.81 mmol·g^(-1))and 1-phenylethanol(1-PE,1.35 mmol·g^(-1))compared with the previously reported materials.Further,the adsorption properties of aromatic compounds on HSPS-ACD(H)were investigated in batch mode.For practical application,continuous adsorption experiments were conducted in a HSPS-ACD(H)-packed fixed bed,where the target aromatic components in wastewater were effectively retained and further released by elution.Besides showing the reversible adsorption and efficient enrichment effect,the HSPS-ACD(H)-packed fixed bed also maintained great stability in multiple cycles.Moreover,quantum chemical calculations were performed to elucidate the potential mechanism of adsorption of AP and 1-PE onto HSPS-ACD(H). 展开更多
关键词 Adsorption Wastewater treatment AROMATICS Hypercrosslinked polymer β-cyclodextrin STARCH
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Preparation of a novel biodegradable β-cyclodextrin-containing polymer
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作者 朱久进 《Journal of Chongqing University》 CAS 2009年第4期217-221,共5页
A novel cyclodextrin-containing polymer was prepared by graftingβ-cyclodextrin onto the backbone of poly(D,L-lactic acid)(PLA).First,mono(6-(2-aminoethyl)amino-6-deoxy)-β-cyclodextrin(β-CD-6-en)was prepared by sulf... A novel cyclodextrin-containing polymer was prepared by graftingβ-cyclodextrin onto the backbone of poly(D,L-lactic acid)(PLA).First,mono(6-(2-aminoethyl)amino-6-deoxy)-β-cyclodextrin(β-CD-6-en)was prepared by sulfonylation and amination ofβ-cyclodextrin and modified poly(D,L-lactic acid)(MPLA)was prepared by free radical polymerization of maleic anhydride and PLA.Then,grafting ofβ-cyclodextrin derivative to MPLA backbone was carried out by N-acylation reaction of MPLA andβ-CD-6-en in dimethyl formamide.The... 展开更多
关键词 poly(D L-lactic acid) β-cyclodextrin β-cyclodextrin polymer chemical modification
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STUDIES ON THE POLYMERIZATION OF β-CYCLODEXTRIN WITH EPICHLOROHYDRIN
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作者 徐文英 汪月生 +3 位作者 沈三荣 李一山 夏树良 张意颖 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1989年第1期16-22,共7页
Different proportions of β-cydodextrin and epichlorohydrin were used to prepare a group of β-cyclodextrin polymers. The relationship between the reaction extent and the molar ratios of reactants was discussed accord... Different proportions of β-cydodextrin and epichlorohydrin were used to prepare a group of β-cyclodextrin polymers. The relationship between the reaction extent and the molar ratios of reactants was discussed according to the results of ~1H-NMR, ^(13) C-NMR spectra and elemental analysis. Especially, high resolution ~1H-NMR spectra were usd for studying the reaction active sites and the extent of reaction. The solubility of oil soluble drugs in water was largely improved in the presence of water-soluble β-cyclodextrin polymer. 展开更多
关键词 β-cyclodextrin EPICHLOROHYDRIN Water-soluble polymers β-CD
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