| 制备方法对GO/P(NIPAM-MA)水凝胶La3+吸附性能的影响 |
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| 引用本文： | 杨新蔚,单国荣,曹志海,吕挺,潘鹏举.制备方法对GO/P(NIPAM-MA)水凝胶La3+吸附性能的影响[J].化工学报,2019,70(10):4072-4079. |
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| 作者姓名： | 杨新蔚 单国荣 曹志海 吕挺 潘鹏举 |
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| 作者单位： | 化学工程联合国家重点实验室,浙江大学化学工程与生物工程学院,浙江杭州 310027;浙江大学衢州研究院,浙江衢州324000;浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州,310018;杭州电子科技大学材料与环境工程学院,浙江杭州,310018 |
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| 摘 要： | 用冷冻聚合法和非冷冻聚合法制备了氧化石墨烯/聚(N-异丙基丙烯酰胺-顺丁烯二酸)(GO/P(NIPAM-MA))水凝胶，比较制备方法对GO/P(NIPAM-MA)水凝胶La3+吸附能力的影响，发现通过冷冻聚合法合成的水凝胶，具有更加优异的溶胀-退溶胀性能和吸附性能。NIPAM与MA摩尔比为10∶1的冷冻聚合法水凝胶，在370 mg/L的LaCl3溶液中平衡吸附量为(29.87±0.073)mg/g，而相同条件下的非冷冻聚合法水凝胶平衡吸附量仅为(20.29±0.395)mg/g。冷冻聚合法水凝胶的Freundlich等温线拟合参数n值随着MA含量的增加呈线性增加，而非冷冻聚合法水凝胶增加幅度小于冷冻聚合法。经过5次吸附-解吸循环，冷冻聚合法水凝胶的形状和体积没有明显变化且吸附能力没有明显下降，而非冷冻聚合法水凝胶经过3次吸附-解吸循环就出现破碎，无法再使用。冷冻聚合法合成的GO/P(NIPAM-MA)水凝胶具有La3+平衡吸附量大、可重复使用等优点。
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| 关 键 词： | 吸附 脱附 水凝胶 冷冻聚合 La3+ |
| 收稿时间： | 2019-04-10 |
| 修稿时间： | 2019-05-09 |
Effect of preparation methods on La3+ adsorption properties ofGO/P(NIPAM-MA) hydrogels |
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| Xinwei YANG,Guorong SHAN,Zhihai CAO,Ting LYU,Pengju PAN.Effect of preparation methods on La3+ adsorption properties ofGO/P(NIPAM-MA) hydrogels[J].Journal of Chemical Industry and Engineering(China),2019,70(10):4072-4079. |
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| Authors: | Xinwei YANG Guorong SHAN Zhihai CAO Ting LYU Pengju PAN |
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| Abstract: | Graphene oxide/poly(N-isopropylacrylamide-maleic acid) (GO/P(NIPAM-MA)) hydrogel was prepared by freeze polymerization and non-freeze polymerization, and the preparation method was compared to GO/P(NIPAM-MA) hydrogel La3+ adsorption capacity. It was found that the hydrogel synthesized by freeze polymerization method has an excellent swelling-shrinking and adsorption properties. With an equivalent molar ratio of 10∶1 for NIPAM∶MA and 370 mg/L of LaCl3 solution, the equilibrium adsorption capacity of hydrogel synthesized by freeze polymerization method was (29.87±0.073) mg/g, while that of by non-freeze polymerization method was only (20.29±0.395) mg/g. Fitting parameter, n, of the Freundlich isotherm increased linearly with the increase of MA content for hydrogel synthesized by freeze polymerization method, and the increasing degree was larger than that of by non-freeze polymerization method. After five repeated adsorption-desorption cycles, it was found that there was no significant deformation and the adsorption capacity was not obviously decreased for hydrogel synthesized by freeze polymerization method, while it was broken after three repeated adsorption-desorption cycles for hydrogel synthesized by non-freeze polymerization method. The GO/P(NIPAM-MA) hydrogel synthesized by the freeze polymerization method has the advantages of large La3+ equilibrium adsorption capacity and reusability. |
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| Keywords: | adsorption desorption hydrogel freeze polymerization La3+ |
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