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Investigation on the Inverse Emulsion Polymerization of Acrylic Acid
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作者 Jian Fang GE Feng Ji LU Wen DING 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第10期993-996,共4页
Polyacrylic acid particles in nano-scale were synthesized using an inverse (W/O) emulsion polymerization method. The particle size and size change of inverse micelles which solubilize a part of monomer solution was mo... Polyacrylic acid particles in nano-scale were synthesized using an inverse (W/O) emulsion polymerization method. The particle size and size change of inverse micelles which solubilize a part of monomer solution was monitored by PCS (photon correlation spectroscopy) and the particles of polyacrylic acid were viewed in scanning electron microscope for the first time. It was concluded that the inverse micelles were primarily the polymerization reaction sites. 展开更多
关键词 Polyacrylic acid inversion emulsion polymerization radical reaction.
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Synthesis, adsorption and selectivity of inverse emulsion Cd(Ⅱ) imprinted polymers 被引量:3
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作者 Luwei Li Fang Zhu +1 位作者 Yanhong Lu Jian Guan 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第3期494-500,共7页
Inverse emulsion polymerization was employed to synthesize inverse emulsion Cd(Ⅱ) imprinted polymers (IEⅡ P). The morphology and functional groups of IEⅡP were characterized by SEM,FTIR and TG. Static adsorptio... Inverse emulsion polymerization was employed to synthesize inverse emulsion Cd(Ⅱ) imprinted polymers (IEⅡ P). The morphology and functional groups of IEⅡP were characterized by SEM,FTIR and TG. Static adsorption experiments and competitive adsorption test were used to evaluate the adsorption ability of IEⅡP. The adsorption capacity of polymers could reach 86.7 mg·g^-1 under the optimal adsorption conditions. The pseudo second order kinetic model and Langmuir isotherm model could be used to analyze the experimental data well. The adsorption process of IEⅡP was chemical adsorption process and monomolecular type. Thermodynamic parameters showed that the adsorption process was endothermic and could occur spontaneously. The selectivity coefficients k of Cd^2+/v, Cd^2+/Zn^2+ and Cd^2+/Cu^2+ were 2.4998, 1.2437 and 4.6882, respectively. The proposed method provides a new thought for removing Cd(Ⅱ) in water samples. 展开更多
关键词 Cd(Ⅱ) imprinted polymers Inverse emulsion Kinetic Thermodynamics
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THE PREPARATION OF DOXORUBICIN-POLYVINYLPYRROLIDONE-NANOPARTICLES BY INVERSE EMULSION POLYMERIZATION
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作者 LV Fengjiao LIN Huaxiang +1 位作者 XU Xiaoping CHEN Xiaogeng 《Chinese Journal of Reactive Polymers》 2006年第1期76-80,共5页
Doxorubicin-loaded nanoparticles, using doxorubicin (ADM) as model drug and vinylpyrrolidone as matrix, were prepared by inverse emulsion polymerization in the paper. The nanoparticles were characterized by telescop... Doxorubicin-loaded nanoparticles, using doxorubicin (ADM) as model drug and vinylpyrrolidone as matrix, were prepared by inverse emulsion polymerization in the paper. The nanoparticles were characterized by telescope electron microscopy (TEM), laser light scattering technique (LLS) and infrared spectrum (IR). LLS test showed that the optimal prepared ADM-loaded nanoparticles had an average size 18.8nm and a narrow size distribution between 15nm and 32nm, which was consistent with the result obtained by TEM. And 1R results indicated that the nanoparticles consisted of ADM and polyvinylpyrrolidone (PVP). 展开更多
关键词 NANOPARTICLES POLYVINYLPYRROLIDONE Inverse emulsion polymerization
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Preparation of Chitosan-g-PAM PS in H_2O/scCO_2 Inverse Emulsion
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作者 王晶 孙扶 +2 位作者 仲建峰 方舟 董擎之 《Journal of Donghua University(English Edition)》 EI CAS 2013年第3期169-174,共6页
Chitosan (CS) was successfully modified in supercritical carbon dioxide ( scCOz ) by grafting method to enhance its water solubility. In this work, a three.arm star-like fluorinated polymer was synthesized by atom... Chitosan (CS) was successfully modified in supercritical carbon dioxide ( scCOz ) by grafting method to enhance its water solubility. In this work, a three.arm star-like fluorinated polymer was synthesized by atom transfer radical polymerization ( ATRP ) method and applied as a surfactant in supereriticul carbon dioxide (scCO2 ). Then 2-acrylamido-2-methyl propane sulfonie acid (AMPS) was grafted onto CS (CS-g-PAMPS) in H2O/scCO2 inverse emulsion. The effects of mass ratio of water and surfactants (Rw/s ) and pressure of scCO2 on the grafting reaction were investigated. The grafting rate, partide size, and dispersity in water of CS-g-PAMPS varied greatly as Rw/s and pressure of scCO2 changed. It could be found that the value of Rw/s at 12 and the pressure of scCO2 at 30 MPa were the optimum conditions for the grafting reaction. CS-g-PAMPS prepared in this reaction system has higher grafting rate, smaller particle sizes, and better dispersity in water than those prepared via conventional methods. 展开更多
关键词 atom transfer radical polymerization (ATRP) graft copolymer inverse emulsion polymerization supercritical carbon dioxide scCO2 SURFACTANT
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DMC-grafted cellulose as green-based flocculants for agglomerating fine kaolin particles 被引量:3
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作者 Meng Li Yulong Wang +2 位作者 Xiaobang Hou Xia Wan Hui-Ning Xiao 《Green Energy & Environment》 SCIE 2018年第2期138-146,共9页
Novel cellulose based flocculants C-g-P(DMC) with various chain architectures are synthesized through a situ graft copolymerization. The cationic ammonium chloride group(DMC) is grafted onto cellulose by two separate ... Novel cellulose based flocculants C-g-P(DMC) with various chain architectures are synthesized through a situ graft copolymerization. The cationic ammonium chloride group(DMC) is grafted onto cellulose by two separate inverse emulsion polymerization with γ-methacryloxypropyl trimethoxy silane(KH-570) and double bond addition reactions, which is a new and simple method to employ KH-570 as a bridge for the connection of cellulose matrix and DMC group. The effects of pH, flocculant dose, standing time on turbidity of kaolin suspensions and particle sizes have been studied systematically. In addition, the response surface methodology(RSM) study confirms that PAC and C-g-P(DMC)have synergy in turbidity removal with a higher removal efficiency of 98.32%. Moreover, C-g-P(DMC) 1 has higher removal efficiency with 96.5% at a low dosage of 0.6 mg L^(-1) and better floc properties than C-g-P(DMC) 2 and C-g-P(DMC) 3, suggesting that the length and quantity of cationic branch chains play a crucial role in Kaolin flocculation due to their dramatically enhanced bridging effects. 展开更多
关键词 CELLULOSE Cationic flocculant Inverse emulsion polymerization Kaolin suspension
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Preparation of polyacrylamide/silica composite capsules by inverse Pickering emulsion polymerization 被引量:5
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作者 Kui Zhang Qian Wang +3 位作者 Hong Meng Mian Wang Wei Wu Jianfeng Chen 《Particuology》 SCIE EI CAS CSCD 2014年第3期12-18,共7页
Polyacrylamide/silica (PAM/SiO2) composite capsules were synthesized by inverse Pickering emulsion polymerization. Silica nanoparticles modified with methacryloxypropyltrimethoxysilane (MPS) were used as a stabili... Polyacrylamide/silica (PAM/SiO2) composite capsules were synthesized by inverse Pickering emulsion polymerization. Silica nanoparticles modified with methacryloxypropyltrimethoxysilane (MPS) were used as a stabilizer. Transmission electron microscopy (TEM), scanning electron microscopy (SEM). Fourier transform infrared (FTIR) spectroscopy, and thermal gravimetric analysis (TGA) were used to characterize the morphology and composition of the composite capsules. SEM and TEM images showed that capsules consisted of a particle shell and a polymer inner layer. The capsule size depends on the nanoparticle concentration in the continuous phase. The composite rigidity largely depends on the acrylamide concentration. FTIR and TGA results indicated the existence of polyacrylamide and SiO2 in the composite particles. Aqueous Hg(ll) removal testing by the PAM/SiO2 composite capsules indicated promising potential for removing heavy metal ions from wastewater. 展开更多
关键词 PAM/SiO2 composite capsule Inverse Picketing emulsion polymerization Mercury ion Adsorption
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PREPARATION AND CHARACTERIZATION OF DOXORUBICIN-LOADED MAGNETIC ANTICANCER NANOPARTICLES
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作者 LV Fengjiao LIN Huaxiang +1 位作者 CHEN Xiaogeng XU Xiaoping 《Chinese Journal of Reactive Polymers》 2007年第1期96-100,共5页
Doxorubicin(ADM)-loaded magnetic anticancer nanoparticles, using Fe3O4 as core, doxorubicin as model drug and polyvinylpyrrolidone (PVP) as matrix, were prepared by inverse emulsion polymerization. The experimenta... Doxorubicin(ADM)-loaded magnetic anticancer nanoparticles, using Fe3O4 as core, doxorubicin as model drug and polyvinylpyrrolidone (PVP) as matrix, were prepared by inverse emulsion polymerization. The experimental results showed that the average diameter of Fe3O4 particles was 19.8nm. The X-ray diffraction itzdicated that the prepared Fe3O4 particle was pure cubic Fe3O4, The results obtained by SEM showed the magnetic nanoparticles under optimal operating condition had a smooth spherical surface, LLS showed an average size of 78. 7nm. And IR results demonstrated that they consisted of ADM, PVP and Fe3O4. 展开更多
关键词 Magnetic nanoparticles POLYVINYLPYRROLIDONE Inverse emulsion polymerization.
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