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    张银山, 毛 曦, 刘 通, 等. 磁和CO2双响应型可降解微凝胶对阴离子染料的可逆吸附与释放[J]. 功能高分子学报,2022,35(2):164-171. doi: 10.14133/j.cnki.1008-9357.20210322003
    引用本文: 张银山, 毛 曦, 刘 通, 等. 磁和CO2双响应型可降解微凝胶对阴离子染料的可逆吸附与释放[J]. 功能高分子学报,2022,35(2):164-171. doi: 10.14133/j.cnki.1008-9357.20210322003
    ZHANG Yinshan, MAO Xi, LIU Tong, GUO Zanru, XIONG Leyan, LIU Yongxin. Reversible Adsorption/Release for Anionic Dyes of Magnetic and CO2 Dual-Responsive Degradable Microgels[J]. Journal of Functional Polymers, 2022, 35(2): 164-171. doi: 10.14133/j.cnki.1008-9357.20210322003
    Citation: ZHANG Yinshan, MAO Xi, LIU Tong, GUO Zanru, XIONG Leyan, LIU Yongxin. Reversible Adsorption/Release for Anionic Dyes of Magnetic and CO2 Dual-Responsive Degradable Microgels[J]. Journal of Functional Polymers, 2022, 35(2): 164-171. doi: 10.14133/j.cnki.1008-9357.20210322003

    磁和CO2双响应型可降解微凝胶对阴离子染料的可逆吸附与释放

    Reversible Adsorption/Release for Anionic Dyes of Magnetic and CO2 Dual-Responsive Degradable Microgels

    • 摘要: 首先以甲基丙烯酸二乙氨基乙酯为单体,通过反相悬浮聚合制备了CO2响应型可降解微凝胶;然后在该微凝胶中原位合成Fe3O4磁性纳米粒子,制备了磁和CO2双响应型可降解微凝胶。通过傅里叶变换红外(FT-IR)光谱仪、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等对微凝胶的组成和结构进行了表征。结果表明:CO2响应之后的微凝胶对阴离子染料可进行选择性吸附,对茜素红的最大吸附量为1413 mg/g;微凝胶的磁响应性使其能够得到便捷的分离回收,被吸附的染料能够通过碱洗释放,并且在CO2刺激下微凝胶又能够重复使用。

       

      Abstract: Degradable magnetic and CO2 dual-responsive microgels were prepared by inverse suspension polymerization and in-situ synthesis of nanoparticles. The structure and morphology of microgels were characterized by Fourier-transformed infrared (FT-IR) spectroscopy, scanning electron microscope (SEM) and transmission electron microscope (TEM). The microgels exhibited magnetic and CO2 responsiveness, and could be degraded upon the treatment of D, L-dithiothreitol (DTT). After treating with the stimulus of CO2, the microgels exhibited a selective adsorption for anionic dyes. The maximum adsorption capacity was up to 1413 mg/g for Alizarin red (AR). The microgels with adsorbates could be separated from solutions under the help of an external magnetic field. Besides, the adsorbates could be described by treating with solution of pH 12. Microgels regenerated with CO2 trigger exhibited high adsorption ability (>90%) after three consecutive recycling trials.

       

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