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DuaI-Functionalized hollow polymer Particle as a pH-Responsive Adsorbent for Selective Removal of Basic Dye

Chinese Journal of Chemistry 2017年第5期35卷 596-604页

作者： Dong Chen Yang Liu Yan Qin Li Wang Yuhong Ma Wantai Yang State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China Key Laboratory of Carbon Fiber and Functional polymers Ministry of Education Beijing University of Chemical Technology Beijing 190029 China

In the present work,novel dual-functionalized hollow polymer particles （DF-HPP） with high density of carboxylate and amino dual functional groups have been specially designed and fabricated to serve as high-performance adsorbent for selective removal of basic dye （methylene blue,b-MB,as a model dye）.Due to both the high surface area and the extremely high density of carboxylate and amino groups,the DF-HPPs exhibited excellent adsorption property for methylene blue （b-MB）,including high adsorption capacity,fast adsorption/desorption rates,unique pH-sensitivity and easy *** equilibrium adsorption data of b-MB on the DF-HPPs were evaluated using Freundlich and Langmuir isotherm models,and the equilibrium isotherm was better fit with Langmuir model with a maximum adsorption capacity of 538.8 mg/g at pH *** interestingly,the DF-HPPs showed a significant pH-dependent equilibrium adsorption capacity,which decreased dramatically from 516.1 mg/g to 24 mg/g as the solution pH decreased from 12 to *** dye-adsorbed DF-HPPs can be facilely and rapidly regenerated under mild condition （under weak acidic solution,pH 3,in 30 min） to recover both b-MB and the DF-HPPs,and the regenerated DF-HPPs can be reused for dye removal with high efficiency,indicating the exceptional recyclability of the DF-HPPs.

关键词： dual-functional hollow polymer particles adsorbent adsorption basic dye

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PREPARATION OF hollow LATEX particles BY ALKALI-ACID TREATMENT

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Journal of Shanghai Jiaotong university(Science) 2001年第1期6卷 10-15页

作者：郝冬梅王新灵朱卫华唐小真刘成岑施凯 School of Chemistry and Chemical Tech. Shanghai Jiaotong Univ. Dept. of Chemistry Eng. Taiyuan Univ. of Tech.

hollow polymer latex particles were prepared by seeded emulsion polymerization. A seed latex consisting of styrene (St), butyl acrylate(BA) copolymer was first prepared, and seeded terpolymerization of St BA MA(methacrylic acid) were then carried out in the absence of surfactant. Final latex was treated by a two step treatment under alkaline and acidic conditions, thus, the particles with hollow structure were obtained. We discussed the effects of pH value, temperature and time in alkali and acid treatment processes on hollow structure within the polymer latex particles and amount of carboxylic group on particle surface. The results show that the hollow polymer latex particles with the largest hollow size can be obtained under a certain condition (pH12.5, 90°C, 3 h in alkali treatment stage and pH2.5, 85°C, 3 h in acid treatment stage).

关键词： seeded emulsion polymerization hollow polymer particles alkali treatment acid treatment morphology

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