Yao Lan, Zhang Bingjie, Jiang Hongjuan, Zhang Lifen, Zhu Xiulin
Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-ai Road, Suzhou 215123, China.
Changzhou Huake Polymers Co., Ltd., 602 Yulong Road, Xinbei District, Changzhou 213022, China.
Polymers (Basel). 2018 Mar 21;10(4):347. doi: 10.3390/polym10040347.
Poly(ionic liquid)s (PILs) have become the frontier domains in separation science because of the special properties of ionic liquids as well as their corresponding polymers. Considering their function in separation, we designed and synthesized a thermoregulated PIL. That is, this kind of PIL could separate with an organic phase which dissolves the monomers at ambient temperature. When heated to the reaction temperature, they become a homogeneous phase, and they separate again when the temperature falls to the ambient temperature after polymerization. Based on this, a thermoregulated phase separated catalysis (TPSC) system for Cu-based atom transfer radical polymerization (ATRP) was constructed. The copper catalyst (CuBr₂) used here is easily separated and recycled in situ just by changing the temperature in this system. Moreover, even when the catalyst had been recycled five times, the controllability over resultant polymers is still satisfying. Finally, only 1~2 ppm metal catalyst was left in the polymer solution phase, which indicates the really high recycling efficiency.
聚离子液体（PILs）因其离子液体及其相应聚合物的特殊性质，已成为分离科学的前沿领域。考虑到它们在分离中的作用，我们设计并合成了一种热调节聚离子液体。也就是说，这种聚离子液体在环境温度下可与溶解单体的有机相分离。加热到反应温度时，它们变成均相，聚合后温度降至环境温度时又会再次分离。基于此，构建了用于铜基原子转移自由基聚合（ATRP）的热调节相分离催化（TPSC）体系。这里使用的铜催化剂（CuBr₂）仅通过改变该体系的温度就能轻松地原位分离和循环利用。此外，即使催化剂已循环使用五次，对所得聚合物的可控性仍然令人满意。最后，聚合物溶液相中仅残留1~2 ppm的金属催化剂，这表明其循环效率非常高。
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