余亚兰,蒋阿丽,尹峰,刘江海.化学通报,2019,82(9):816-820.
微流控法制备多孔微球及其对Cr(Ⅵ)的吸附性能分析
Preparation of porous microspheres by microfluidic method and its adsorption properties for Cr(VI)
投稿时间:2019-04-25  修订日期:2019-06-13
DOI:
中文关键词:  微流控技术  多孔微球  单分散  Cr(Ⅵ)吸附
英文关键词:microfluidic technology  porous microspheres  monodisperse  Cr(VI) adsorption
基金项目:国家自然科学基金青年基金(21506175)
作者单位E-mail
余亚兰 西南石油大学化学化工学院 yuyalan@swpu.edu.cn 
蒋阿丽 西南石油大学化学化工学院  
尹峰 西南石油大学化学化工学院  
刘江海 西南石油大学化学化工学院  
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中文摘要:
      利用玻璃毛细管搭建单级微流控装置制备单分散水包油(O/W)乳液,以乳液为模板,紫外光照射乳液引发自由基聚合,成功制备了单分散甲基丙烯酸甲酯/甲基丙烯酸二甲基氨基乙酯(MMA/DMAEMA)多孔微球。微球粒径偏差系数(CV)值小于5%,单分散性良好。研究了MMA/DMAEMA多孔微球对Cr(Ⅵ)的吸附性能、再生吸附性能、吸附机理。结果表明:pH对微球吸附Cr(Ⅵ)的量有较大影响,当pH=3时,微球对Cr(Ⅵ)吸附率达到52.9%;循环4次后微球吸附率基本不降低,循环性能好;微球吸附符合准二级动力学模型,属于化学吸附;微球等温吸附符合Langmuir模型,属于单分子层吸附。
英文摘要:
      The monodisperse oil-in-water (O/W) emulsions were prepared by using a glass capillary tube to build a single-stage microfluidic device. By using the emulsions as a template, the ultraviolet light irradiated the emulsions to initiate the free radical polymerization, and the methyl methacrylate/dimethylaminoethyl methacrylate (MMA/DMAEMA) porous microspheres were successfully prepared. The particle deviation coefficient (CV) value of the microspheres was less than 5%, and the monodispersity was good. The adsorption mechanism, regenerative adsorption property and adsorption property of MMA/DMAEMA porous microspheres for Cr(VI) were investigated. The results showed that the pH had a great influence on the adsorption rate of microspheres. When the pH value was 3, the adsorption rate of microspheres reached 52.9%. After the fourth cycles, the adsorption rate was basically not reduced, and the cycle performance was good. The microsphere adsorption conformed to the quasi-secondary kinetic model and belonged to the chemical adsorption. The microsphere isotherm adsorption conformed to the Langmuir model and belonged to the monolayer adsorption.
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