A novel thermosensitive porous imprinted polymer for selectively separating ReO4− based on Pickering‐like emulsion polymerization

吸附 聚合 聚合物 材料科学 化学工程 乳液聚合 解吸 皮克林乳液 分子印迹聚合物 沉淀聚合 高分子化学 化学 选择性 有机化学 自由基聚合 催化作用 纳米技术 纳米颗粒 复合材料 工程类
作者
Xianhang Bu,Zhengcan Chen,Xiaoyu Lin,Wan Xu,Yuanjun Sun,Xiaojian Ou,Yuan Sun,Zhenbin Chen
出处
期刊:Journal of Applied Polymer Science [Wiley]
卷期号:141 (42)
标识
DOI:10.1002/app.56095
摘要

Abstract In this study, we combined the imprinting technique, temperature‐sensitive polymer, and Pickering emulsion polymerization to prepare a temperature‐sensitive porous imprinted polymer. First, the temperature‐sensitive block polymer PDEA‐b‐P (DEA‐co‐AM) was prepared by reversible‐addition fragmentation chain transfer polymerization, and then a temperature‐sensitive porous ReO 4 − imprinted polymer (ReO 4 − ‐TPIP) was prepared using the Pickering‐like polymerization technique, which was introduced to the preparation of the imprinted polymer. The structure and morphology of the polymer were characterized by FTIR, SEM‐EDS, and BET. The adsorption experiments showed that the maximum adsorption (Q), separation (R), and desorption (D) of ReO 4 − ‐TPIP were 0.1568 mmol/g, 3.41, and 85.22%, respectively, and the adsorption equilibrium could be reached after 120 min, which decreased to 0.1212 mmol/g, 1.23, and 70.01% after repeated use for 11 times. These results indicate that ReO 4 − ‐TPIP has good adsorption and reusability properties. The adsorption studies showed that ReO 4 − ‐TPIP conformed to the zero‐level kinetic model in the pre‐adsorption stage, the quasi‐one‐level kinetic model in the late stage, and the isothermal adsorption process conformed more to the Langmuir model. In addition, in the secondary leach solution of high‐temperature alloys, the purity of rhenium in the solution increased from 35.4119% to 53.4812% after one adsorption/desorption cycle. The prepared ReO 4 − ‐TPIP provides a new material and strategy for the selective separation and purification of rhenium in complex rhenium‐containing solutions for the industry.
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