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Removal of Dye Using Lignin-Based Biochar/Poly(ester amide urethane)Nanocomposites from Contaminated Wastewater
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作者 Annesha Kar Niranjan Karak 《Journal of Renewable Materials》 EI CAS 2024年第9期1507-1540,共34页
The pursuit of incorporating eco-friendly reinforcing agents in polymer composites has accentuated the exploration of various natural biomass-derived materials.The burgeoning environmental crisis spurred by the discha... The pursuit of incorporating eco-friendly reinforcing agents in polymer composites has accentuated the exploration of various natural biomass-derived materials.The burgeoning environmental crisis spurred by the discharge of synthetic dyes into wastewater has catalyzed the search for effective and sustainable treatment technologies.Among the various sorbent materials explored,biochar,being renewable,has gained prominence due to its excellent adsorption properties and environmental sustainability.It has also emerged as a focal point for its potential to replace other conventional reinforcing agents,viz.,fumed silica,aluminum oxide,treated clays,etc.This study introduces a novel class of polymer nanocomposites comprising of lignin-based biochar particles and poly(ester amide urethane)matrix via a feasible method.The structural evaluation of these nanocomposites was accomplished using Fourier-transform infrared spectroscopy,X-ray photoelectron spectroscopy,and powder X-ray diffraction.The polymer nanocomposites exhibited superior mechanical properties with an increment in tensile strength factor by 45%in comparison to its pristine matrix,along with an excellent toughness value of 90.22 MJm^(−3)at a low loading amount of only 1 wt%.The composites showed excellent improvement in thermal properties with a sharp rise in the glass transition temperature(Tg)value from−28.15℃to 84℃,while also championing sustainability through inherent biodegradability attributes.Beyond their structural prowess,these polymer nanocomposites demonstrated excellent potential as adsorbents,displaying efficient removal of malachite green and tartrazine dyes from aqueous systems with a removal efficiency of 87.25%and 73.98%,respectively.The kinetics study revealed the pseudo second order model to be the precision tool to assess the dye removal study.Complementing this,the Langmuir adsorption isotherm provided a framework to assess the sorption features of the polymer nanocomposites.Overall,these renewable biochar integrated polymer matrices boast remarkable recovery capabilities up to seven cycles of usage with an excellent dye recovery percentage of 95.21%for the last cycle,thereby defining sustainability as well as economic feasibility. 展开更多
关键词 Reinforcing agents BIOCHAR polymer nanocomposites poly(ester amide urethane) dye removal adsorption kinetics pseudo second order model langmuir isotherm
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Hyperbranched Poly(amide-ester) Mildly Synthesized and Its Characterization 被引量:2
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作者 陈庆华 陈荣国 +2 位作者 肖荔人 钱庆荣 章文贡 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第7期877-883,共7页
AB2-type-prepolymerized monomer was rapidly (2 h) prepared at room temperature (25 ℃) using commercially available maleic anhydride (MA) and diethanolamine (DEA) as raw materials. By employing toluene-p-sulfo... AB2-type-prepolymerized monomer was rapidly (2 h) prepared at room temperature (25 ℃) using commercially available maleic anhydride (MA) and diethanolamine (DEA) as raw materials. By employing toluene-p-sulfonic acid as a catalyzer, a series of hyperbranched poly(amide-ester) (HBPAE) were successfully synthesized from prepared AB2 monomer by solution condensation polymerization through "one-step process" or "pseudo one-step process" (using pentaerythritol as a center core). The processes were carried out at high temperature of 120 ℃ for 6 h in air atmosphere (inert protection free) with reduced pressure distillation (0.08--0.096 MPa). The results of FT-IR, UV-Vis, TGA, and intrinsic viscosity testing by Ubbelodhe viscometer showed that the prepared HBPAEs possess three-dimensional configuration with unsaturated conjugate structure, large numbers of branches and numerous terminal hydroxyl groups. These result in their low viscosity, high solubility and thermal stability. 展开更多
关键词 maleic anhydride DIETHANOLAMINE AB2-type-prepolymerized monomer hyperbranched polyamide-ester one-step process pseudo one-step process
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SYNTHESIS AND CHARACTERIZATION OF HYPERBRANCHED POLY(ESTER-AMIDE)S BASED ON GALLIC ACID AND DL-2-AMINOBUTYRIC ACID 被引量:1
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作者 李悦生 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2004年第1期1-5,共5页
A novel AB3-type monomer was prepared from gallic acid and DL-2-aminobutyric acid, and used for the synthesis of the biocompatible hyperbranched poly(ester-amide)s by self-polycondensation. The polymers were character... A novel AB3-type monomer was prepared from gallic acid and DL-2-aminobutyric acid, and used for the synthesis of the biocompatible hyperbranched poly(ester-amide)s by self-polycondensation. The polymers were characterized via FTIR and NMR spectroscopy and thermal analysis, and the average degree of branching of the polymers was estimated to be 0.75. The polymers with abundant acetyl end groups were found to be amorphous with lower intrinsic viscosity, better thermal stability and excellent solubility. 展开更多
关键词 Hyperbranched polymer BIOCOMPATIBLE Gallic acid Hyperbranched poly(ester-amide)s
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SYNTHESIS, CHARACTERIZATION OF CHIRAL POLY(ESTER AMIDE)S DERIVED FROM L-ISOLEUCINE
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作者 范星河 Jing-LunZhou +2 位作者 Xiao-FangChen Xin-HuaWan 周其凤 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2004年第5期497-500,共4页
A series of new optically active aromatic poly(ester amide)s containing a chiral group in the side chain prepared from the p-toluenesulfonic acid salt of o,o'-bis(leucyl)-hexanediol (TS-+LHD+TS-) and p-phthaloyl c... A series of new optically active aromatic poly(ester amide)s containing a chiral group in the side chain prepared from the p-toluenesulfonic acid salt of o,o'-bis(leucyl)-hexanediol (TS-+LHD+TS-) and p-phthaloyl chloride and styrene-2,5- dicarbonyl chloride styrene have been synthesized by interfacial polymerization. The structure of the monomer is elucidated by FT-IR and elemental analysis. The thermal properties of the polymers were studied by DSC and TGA. The chiroptical properties of the above polymer have also been studied by circular dichroism (CD) spectroscopy. Results indicated that these polymers form helical structures. 展开更多
关键词 poly(ester amide) 1 6-HEXANEDIOL L-ISOLEUCINE p-Phthaloyl chloride
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Synthesis and Properties of Thermoplastic Polyisocyanurates:Polyisocyanuratoamide,Polyisocyanurato(Ester-Amide)and Polyisocyanurato(Urea-Ester)
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作者 Rui Hou Zhihuang Zhang +1 位作者 Guangzhao Zhang Donglin Tang 《Journal of Renewable Materials》 SCIE EI 2020年第4期397-403,共7页
It has been proved that introducing isocyanurate into polymer chains could improve the flame retardancy of polymers.We describe in this work the synthesis and the thermal property study of three thermoplastic polyisoc... It has been proved that introducing isocyanurate into polymer chains could improve the flame retardancy of polymers.We describe in this work the synthesis and the thermal property study of three thermoplastic polyisocyanurates,which are polyisocyanuratoamide(PICA-6),polyisocyanurato(ester amide)(PICEA-6)and polyisocyanurato(urea ester)(PICUE-6).These polymers show similar and improved thermal stability with the existence of isocyanurate rings.PICA-6 is more crystalizable than the rest two and the melting temperature is found to be around 240℃ but it still crystalizes slowly.For PICEA-6 and PICUE-6,only glass transition can be observed on the DSC traces.The glass transition temperature follows the order of PICA-6>PICEA-6>PICUE-6(101.9,77.9 and 28.7℃,respectively). 展开更多
关键词 Thermoplastic polyisocyanurate polyamide poly(ester amide) poly(urea ester)
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Synthesis and Characterization of Thermoplastic Poly(Ester Amide)s Elastomer (TPEaE) Obtained from Recycled PET
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作者 Zhi-Yu Yang Yi-Ling Chou +2 位作者 Hao-Chun Yang Chin-Wen Chen Syang-Peng Rwei 《Journal of Renewable Materials》 SCIE EI 2021年第5期867-880,共14页
A series of thermoplastic polyester elastomer (TPEE) and thermoplastic poly(ester amide)s elastomer (TPEaE)copolymers were obtained by depolymerizing PET (polyethylene terephthalate) by which the waste PET canbe effic... A series of thermoplastic polyester elastomer (TPEE) and thermoplastic poly(ester amide)s elastomer (TPEaE)copolymers were obtained by depolymerizing PET (polyethylene terephthalate) by which the waste PET canbe efficiently recovered and recycled into value-added products from a practical and economical point of view.The structure of TPEE and TPEaE was identified using nuclear magnetic resonance (NMR) and Fourier transforminfrared spectroscopy (FT-IR). Differential scanning calorimetry (DSC) data showed that the melting temperature(Tm) decreased with the amide content increased. The glass transition temperature (Tg) was increased as introducingthe amide group, and the formation of amide-ester and amide-amide hydrogen bonds increased the intermolecularchain force. The intrinsic viscosity (η) showed the tendency of increment from TPEE (0.53 dL g^(−1)) to TPEaE-5%(0.72 dL g^(−1)) due to the reinforcement of hydrogen bond and chain entanglement. 展开更多
关键词 Recycle polyethylene terephthalate(r-PET) DEpolyMERIZATION thermalplastic poly(ester amide)s copolymer(TPEaE)
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Effect of nano Al_(2)O_(3) addition on cycling performance of poly(ether block amide)based solid-state lithium metal batteries
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作者 Changlin Liu Yang He +5 位作者 Xiaowei An Zhijun Wu Xiaogang Hao Qiang Zhao Abuliti Abudula Guoqing Guan 《Resources Chemicals and Materials》 2023年第2期167-176,共10页
A novel poly(ether block amide)(PEBA)based solid-state polymer electrolyte(SPE)was prepared using a casting method,in which 20wt%lithium(Li)bis-(trifluoromethanesulfonyl)imide(LiTFSI)and aluminum oxide(Al_(2)O_(3))nan... A novel poly(ether block amide)(PEBA)based solid-state polymer electrolyte(SPE)was prepared using a casting method,in which 20wt%lithium(Li)bis-(trifluoromethanesulfonyl)imide(LiTFSI)and aluminum oxide(Al_(2)O_(3))nanoparticles were used as the Li salt and solid plasticizer,respectively.In the case of addition of 3wt%Al_(2)O_(3) nanoparticles,ion conductivity of the obtained PEBA 2533-20wt%LiTFSI-3wt%Al_(2)O_(3) SPE was 3.57×10^(−5) S cm^(−1) at 25°C.Furthermore,the Li symmetrical battery assembled with it showed excellent cycling stability(1000 h)at 0.1 mA cm^(−2).While,the assembled all-solid-state Li/PEBA 2533-20%LiTFSI-3wt%Al_(2)O_(3)/LiFePO 4(areal capacity:0.15 mAh cm^(−2))battery maintained 94.9%of the maximal capacity(133.9 mAh g^(−1@0.1) mA cm^(−2))at 60°C even after 650 cycles with a superior average coulombic efficiency(CE)of 99.84%.By using X-ray photoelectron spectroscope(XPS),self-aggregation layer(SAL)of polyamide 12(PA12)of PEBA 2533 was discovered,which should contribute to promoting the robustness of lithium fluoride(LiF)enriched solid-electrolyte interphase(SEI)layer.In addition,it is considered that the state of interface between SPE and cathode should be the cause of voltage polarization of the full cell. 展开更多
关键词 Lithium metal batteries Solid-state polymer electrolyte poly(ether block amide)2533 Solid-electrolyte interphase Self-aggregation layer
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Synthesis and Properties of Lactic Acid-based Cross-linked Poly(ester-amide)
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作者 Yue Ying HE Cong Ming XIAO 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第5期645-648,共4页
A novel lactic acid-based cross-linked poly(ester-amide) (LCPEA) was synthesized. The gel fraction of the LCPEA could be modulated by the reaction conditions and it affected the mechanical and thermal properties o... A novel lactic acid-based cross-linked poly(ester-amide) (LCPEA) was synthesized. The gel fraction of the LCPEA could be modulated by the reaction conditions and it affected the mechanical and thermal properties of the LCPEA. The tensile strength, elastic modulus and bend strength of the LCPEA of 65% gel fraction were 4.65, 136.55 and 39.63 MPa, respectively. The thermal decomposition temperature (50 wt%) of the LCPEA was around 410℃. 展开更多
关键词 Lactic acid CROSS-LINKED polyester-amide SYNTHESIS properties.
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Novel Method of Hyperbranched Polymer Modified Nano-SiO_2-Grafting Hyperbranched Poly(amide-ester) from Nano-SiO_2 by One-Step Polycondensation
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作者 赵辉 李杰 +1 位作者 孙瑞敏 罗运军 《Journal of Beijing Institute of Technology》 EI CAS 2008年第1期100-103,共4页
A new method of surface chemical modification of nano-SiO2 is proposed in this paper. In the presence of catalyst, the active hydroxyl groups on the surface of nano-SiO2 reacted with AB2-type monomer (N, N-dihydroxye... A new method of surface chemical modification of nano-SiO2 is proposed in this paper. In the presence of catalyst, the active hydroxyl groups on the surface of nano-SiO2 reacted with AB2-type monomer (N, N-dihydroxyethyl-3-amino methyl propionate) by one-step polycondensation. And the product's Fourer transform infrared (FTIR) graphs and transmission electron microscopy(TEM) images proved that hyperbranched poly (amine-ester) was grafted on nano-SiO2 surface successfully. Results show that the modified nano-SiO2 exhibits excellent dispersion and stability in some solvents such as alcohol and chloroform. 展开更多
关键词 NANO-SIO2 hyperbranched poly amide-ester one-step polycondensation dispersion and stability
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Studies on interacting Blends of Acrylated Epoxy resin based Poly(Ester-Amide)s and Vinyl EsterResin
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作者 Pragnesh N. Dave Nikul N. Patel 《Materials Sciences and Applications》 2011年第7期770-775,共6页
Epoxy resin based Unsaturated poly(ester-amide) resins (UPEAs) can be prepared by many methods but here these were prepared by reported method [1]. These UPEAs were then treated with acrylotl chloride to afford acryla... Epoxy resin based Unsaturated poly(ester-amide) resins (UPEAs) can be prepared by many methods but here these were prepared by reported method [1]. These UPEAs were then treated with acrylotl chloride to afford acrylated UPEAs resin (i.e. AUPEAs). Interacting blends of equal proportional AUPEAs and vinyl ester epoxy (VE) resin were prepared. APEAs and AUPEAs were characterized by elemental analysis, molecular weight determined by vapour pressure osmometer and by IR spectral study and by thermogravimetry. The curing of interacting blends was monitored on differential scanning calorimeter (DSC). Based on DSC data in situ glass reinforced composites of the resultant blends have been prepared and characterized for mechanical, electrical and chemical properties. Unreinforced blends were characterized by thermogravimetry (TGA). 展开更多
关键词 UNSATURATED Bisamic Acid Epoxy RESIN UNSATURATED poly(ester-amide) RESIN (Upeas) Acrylation VINYL ester (VE) RESIN Differential Scanning CALORIMETRY Thermogarvimetry Glass Reinforced Composites
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SYNTHESIS AND CHARACTERIZATION OF THERMOTROPIC COPOLYESTERS AND COPOLY (ESTER-AMIDE)S CONTAINING OXYETHYLENE-ETHER AS THE SPACER
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作者 王尚尔 莫志深 +1 位作者 张宏放 冯之榴 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1995年第4期353-360,共8页
Flexible oxyethylene-ether was introduced into the aromatic copolyesters and copoly (ester-amide)s to reduce the melting point of resulting polymers. The melting point was greatly reduced to 200 degrees C or even lowe... Flexible oxyethylene-ether was introduced into the aromatic copolyesters and copoly (ester-amide)s to reduce the melting point of resulting polymers. The melting point was greatly reduced to 200 degrees C or even lower in some cases, and the molecular weight was satisfactorily high as reflected by inherent viscosity. The polymers exhibited high thermal stability and good mechanical properties as determined by TGA and mechanical tests. The copolyester showed better crystallinity and liquid crystallinity than corresponding copoly (ester-amide)s with similar monomer composition as reflected by POM observation and WAXD study. The melting points for both copolyesters and copoly (ester-amide)s showed great dependence on the p-acetoxybenzoic acid (PAB) content in monomer composition and reached the lowest value when PAB was 29 mol%. 展开更多
关键词 synthesis and comparison liquid crystalline polymer COpolyester copoly(ester-amide)
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Synthesis of Novel Poly(aryl ether amide)s Containing the Phthalazinone Moiety 被引量:4
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作者 Lin CHENG~1 Xi Gao JIAN~2 (~1Department of Materials Science & Engineering, Wuhan Institute of Chemical Technology. Wuhan 430074) (Department of Polymer Science & Materials. DaLian University of Technology. DaLian 1 16012) 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第4期307-310,共4页
Two novel heterocyclic diamine monomers: 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)phenyl] (2H)phthalazin-1-one and 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)-3,5-dimethylphenyl](2H)phthalazin-1-one ... Two novel heterocyclic diamine monomers: 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)phenyl] (2H)phthalazin-1-one and 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)-3,5-dimethylphenyl](2H)phthalazin-1-one were successfully synthesized from readily available heterocyclic bisphenol-like monomers in two steps in high yield. A series of novel poly(aryl ether amide)s containing the phthalazinone moiety were successfully prepared by the direct polymerization of the novel diamines and aromatic dicarboxylic acids using triphenyl phosphite and pyridine as condensing agents. 展开更多
关键词 poly(aryl ether amide)s PHTHALAZINONE direct polymerization heterocyclic diamine
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Synthesis of Methyl-substituted Phthalazinone-based Aromatic Poly(amide imide)s 被引量:2
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作者 Xiu Ling ZHU Xi Gao JIAN Lian Zhou CHEN 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第9期824-825,共2页
A series of novel aromatic poly ( amide imide)s containing phthalazinone moieties were prepared from 2-(4-aminophenyl)-4-[3-methyl-4-(4-aminophenoxy)-2,3-phthalazinone-1], a novel diamine 1 with four diimide-dicarboxy... A series of novel aromatic poly ( amide imide)s containing phthalazinone moieties were prepared from 2-(4-aminophenyl)-4-[3-methyl-4-(4-aminophenoxy)-2,3-phthalazinone-1], a novel diamine 1 with four diimide-dicarboxylic acids by Yamazaki phosphorylation method with the inherent viscosity of 0.36~0.65 dL/g. These polymers had high glass transition temperatures above 300C and they lost 10% weight between 426~475C in N2. The structure of diamine 1 and the polymers was confirmed by IR, 1H NMR and MS. The obtained polymers were readily soluble in polar solvents such as NMP, m-cresol etc. and easily cast into tough, flexible films. The X-ray indicated that they are all amorphous. 展开更多
关键词 Aromatic poly(amide imide) PHTHALAZINONE synthesis heat-resistance.
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Effects of Processing Variables on the Morphology and Diameter of Electrospun Poly(amino acid ester)phosphazene Nanofibers 被引量:2
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作者 林益军 DENG Qinghua JIN Riguang 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第2期207-211,共5页
Poly[(alanino ethyl ester)0.67 (glycino ethyl ester)0.33 phosphazene] (PAGP) was synthesized, and morphology and diameter of the electrospun PAGP nanofibers were systematically evaluated by using a cool field em... Poly[(alanino ethyl ester)0.67 (glycino ethyl ester)0.33 phosphazene] (PAGP) was synthesized, and morphology and diameter of the electrospun PAGP nanofibers were systematically evaluated by using a cool field emission scanning electron microscope (SEM) with changing the important processing variables such as applied voltage, polymeric concentration, and ambient temperature. The average diameter of PAGP nanofibers was inversely proportional to the applied voltage, but increased with the increase of solution concentration. Lower environmental temperature was unfavorable due to the nanofibers conglutination. 展开更多
关键词 ELECTROSPINNING MORPHOLOGY poly(amino acid ester)phosphazene NANOFIBERS
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Highly Heat-Resistant Materials for Microelectronics:Hydrodynamic,Optical,and Conformational Properties of Fluorine Containing Poly(Amido-ortho-Hydroxy Amide) 被引量:2
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作者 Irina A Strelina Liudmila I Rudaya +5 位作者 Ol’ga V Okatova Maxim N Bol’shakov Aleksey YuMarfichev Galina K Lebedeva Yuliya V Shagayko Stanislav M Ramsh 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第1期223-230,共8页
The polycondensation of the mixture of diamines 5,5-methylene bis(2-aminophenol) and 4,4-(hexafluoroisopropylidene)dianiline(molar ratio 0.8:0.2) with isophthaloyl dichloride was used to synthesize poly(amido-o-hydrox... The polycondensation of the mixture of diamines 5,5-methylene bis(2-aminophenol) and 4,4-(hexafluoroisopropylidene)dianiline(molar ratio 0.8:0.2) with isophthaloyl dichloride was used to synthesize poly(amido-o-hydroxy amide)(POA-F)-new heat resistant binder of the composites for microelectronics. The copolymer was fractionated, its hydrodynamic, optical, and conformational properties were researched, and molecular masses(ММ) of the fractions were defined. The polydispersity index was estimated. Based on experimental data, calculation of the size of a segment of Kuhn characterizing degree of an intramolecular orientation order and value of coefficients of the equation of Mark-Kuhn-Hauvink for viscometric and diffusion data were performed. It was demonstrated that introducing 20 mol % of the monomer with-CF3-groups does not lead to any changes in conformational properties of the macromolecules and does not change the degree of intramolecular orientational order(the Kuhn segment length). Optical characteristics of POA-F solutions are virtually similar to the corresponding values for POA prepared with the use of single amine-containing component-5,5-methylene bis(2-aminophenol). The received MM distribution for POA-F(prepolymer) provided the solubility of its films in alkaline solutions. The heat resistance(τ5 and τ10-temperatures corresponding to 5% and of 10% PBO-F mass loss of a polymer) of the powders and the films of PBO, PBO-F were determined. The electrophysical parameters-dielectric permittivity(ε) and dielectric loss tangent(tan δ) of the PBO-F films decreased down to 3.30 and 0.017, in comparison 3.40 and 0.025 for PBO respectively. 展开更多
关键词 poly(o-hydroxy amide) 4 4-(hexafluoroisopropylidene) dianiline Kuhn segment Mark-Kuhn-Houwink equations translational diffusion intrinsic viscosity flow birefringence
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SYNTHESIS OF NEW AROMATIC POLY(AMIDE IMIDE)S FROM UNSYMMETRICAL EXTENDED DIAMINE CONTAINING A PHTHALAZINONE MOIETY 被引量:1
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作者 程琳 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2004年第4期389-393,共5页
The direct polymerization of an unsymmetrical kink non-coplanar heterocyclic diamine (1) with various aromatic bis(trimellitimide)s (2a-e) using triphenyl phosphite and pyridine as condensing agents could generate a s... The direct polymerization of an unsymmetrical kink non-coplanar heterocyclic diamine (1) with various aromatic bis(trimellitimide)s (2a-e) using triphenyl phosphite and pyridine as condensing agents could generate a series of new aromatic poly(amide imide)s (3a-e) containing the kink non-coplanar phthalazinone heterocyclic units in the polymer main chains with inherent viscosities of 0.58-0.66 dL/g. The polymers are readily soluble in a variety of solvents such as N,N- dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, N-methyl-2-pyrrolidinone, pyridine and m-cresol and can be cast to form flexible and tough films. The glass transition temperatures of polymers (Tg) are in the range of 301-327°C, and the temperatures for 5% weight loss in nitrogen are in the range of 498-521 'C. 展开更多
关键词 poly(arylene amide imide)s Heterocyclic polymer High-performance polymer PHTHALAZINONE
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Apoptosis of A549 cells by small interfering RNA targeting survivin delivery using poly-β-amino ester/guanidinylated O-carboxymethyl chitosan nanoparticles 被引量:2
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作者 Yue Tang Yun Liu +2 位作者 Yuwen Xie Jing Chen Yushun Dou 《Asian Journal of Pharmaceutical Sciences》 SCIE CAS 2020年第1期121-128,共8页
Gene-based therapeutics has emerged as a promising approach for human cancer therapy. Among a variety of non-viral vectors, polymer vectors are particularly attractive due to their safety and multivalent groups on the... Gene-based therapeutics has emerged as a promising approach for human cancer therapy. Among a variety of non-viral vectors, polymer vectors are particularly attractive due to their safety and multivalent groups on their surface. This study focuses on guanidinylated O-carboxymethyl chitosan(GOCMCS) along with poly-β-amino ester(PBAE) for si RNA delivery. Binding efficiency of PBAE/si RNA/GOCMCS nanoparticles were characterized by gel electrophoresis. The si RNA-loaded nanoparticles were found to be stable in the presence of RNase A, serum and BALF respectively. Fine particle fraction(FPF) which was determined by a two-stage impinger(TSI) was 57.8% ± 2.6%. The particle size and zeta potential of the nanoparticles were 153.8 ± 12.54 nm and + 12.2 ± 4.94 m V. In vitro cell transfection studies were carried out with A549 cells. The cellular uptake was significantly increased. When the cells were incubated with si Survivin-loaded nanoparticles, it could induce 26.83% ± 0.59% apoptosis of A549 cells and the gene silencing level of survivin expression in A549 cells were 30.93% ± 2.27%. The results suggested that PBAE/GOCMCS nanoparticle was a very promising gene delivery carrier. 展开更多
关键词 poly-β-amino ester Guanidinylated O-carboxymethyl CHITOSAN Nanoparticles Gene delivery
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Synthesis of a Poly(amide-imide)from 5,6-Diphenyl-1-chloroformyl3,4-benzenedicarboxylic Anhydride and Bis (4-aminophenyl)ether 被引量:2
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作者 Xi Gao JIAN Lin CHENG +1 位作者 Hai Bin ZtlEN Zhi Yuan WANG(Department of Polymer Science & Materials. Dalian University of Technology. Dalian 116012Department of Chemistry. Carleton University. Ottawa. Canada) 《Chinese Chemical Letters》 SCIE CAS CSCD 1999年第5期371-372,共2页
A novel poly (amide-imide) was prepared from a novel monomer: 5,6-diphenyl-chloroformyl-3,4-benzenedicarboxylic anhydride and bis (4-aminophenyl) ether. The polymer was characterized by FTIR. (HNMR)-H-1. DSC and TGA.
关键词 poly (amide-imide) 5 6-diphenyl-chloroformyl-3 4-benzenedicarboxylic anhydride
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Effect of Hyperbranched Poly(amine-ester) Grafted Nano-SiO_2 on Reinforcement and Toughness of PVC 被引量:2
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作者 李杰 赵辉 +1 位作者 孙瑞敏 罗运军 《Journal of Beijing Institute of Technology》 EI CAS 2008年第1期104-108,共5页
Nano-SiO2 was modified using silane coupling agent (KH-550) and hyperbranched poly(amine-ester) respectively, and Poly(vinyl chloride) (PVC)/modified nano-SiO2 composites were made by melt-blending. The compos... Nano-SiO2 was modified using silane coupling agent (KH-550) and hyperbranched poly(amine-ester) respectively, and Poly(vinyl chloride) (PVC)/modified nano-SiO2 composites were made by melt-blending. The composites' structures andmechanical properties were characterized by transmission electron microscopy(TEM), sanning electronic microscopy(SEM) and electronic universal testing machine. The results. show that nano-SiO2 grafted by hyperbranched poly (amine-ester) increases obviously in dispersion in PVC matrix, and mechanical properties of PVC are effectively improved. Moreover, it was found that mechanical properties of PVC/nano-SiO2 composites reach the best when weight percent of nano-SiO2 in PVC matrix is 1%. Compared with crude PVC, the tensile strength of hyperbranched poly (amine-ester) grafted nano-SiO2/ PVC composite increases by 24.68 % and its break elongation, flexural strength and impact strength increase by 15.73%, 4.07% and 1 841.84%, respectively. Moreover, the processing of the composites is improved. 展开更多
关键词 NANO-SIO2 hyperbranched poly (amine-ester one-step polycondensation dispersion and stability
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New Phase Transfer Agent for Dye: Application for Hyperbranched Poly (ester-amine) 被引量:1
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作者 TengQIU LiMingTANG XinLinTUO DeShanLIU 《Chinese Chemical Letters》 SCIE CAS CSCD 2004年第8期931-934,共4页
Hydrophilic hyperbranched poly(ester-amine) (HPEA) synthesized from diethanolamine and methyl acrylate was used as phase transfer agent for the first time to transfer methyl orange (MO) from water into chloroform. Thi... Hydrophilic hyperbranched poly(ester-amine) (HPEA) synthesized from diethanolamine and methyl acrylate was used as phase transfer agent for the first time to transfer methyl orange (MO) from water into chloroform. This process was quantified by UV-Vis spectra. A possible mechanism was put forward based on the formation of amphiphilic aggregates. 展开更多
关键词 Hyperbranched poly(ester-amine) phase transfer agent dye.
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