Tan Jianbo, Li Xueliang, He Jun, Xu Qin, Zhang Yuxuan, Dai Xiaocong, Yu Liangliang, Zeng Ruiming, Zhang Li
Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou 510006, China.
Polymers (Basel). 2017 Dec 6;9(12):681. doi: 10.3390/polym9120681.
Herein, we report a photoinitiated reversible addition-fragmentation chain transfer (RAFT) dispersion copolymerization of methyl methacrylate (MMA) and methyl methacrylic (MAA) for the preparation of highly monodisperse carboxyl-functionalized polymeric microspheres. High rates of polymerization were observed, with more than 90% particle yields being achieved within 3 h of UV irradiation. Effects of reaction parameters (e.g., MAA concentration, RAFT agent concentration, photoinitiator concentration, and solvent composition) were studied in detail, and highly monodisperse polymeric microspheres were obtained in most cases. Finally, silver (Ag) composite microspheres were prepared by in situ reduction of AgNO₃ using the carboxyl-functionalized polymeric microspheres as the template. The obtained Ag composite microspheres were able to catalyze the reduction of methylene blue (MB) with NaBH₄ as a reductant.
在此，我们报道了一种用于制备高度单分散的羧基官能化聚合物微球的甲基丙烯酸甲酯（MMA）和甲基丙烯酸（MAA）的光引发可逆加成-断裂链转移（RAFT）分散共聚反应。观察到了高聚合速率，在紫外线照射3小时内实现了超过90%的颗粒产率。详细研究了反应参数（如MAA浓度、RAFT试剂浓度、光引发剂浓度和溶剂组成）的影响，在大多数情况下获得了高度单分散的聚合物微球。最后，以羧基官能化聚合物微球为模板，通过原位还原AgNO₃制备了银（Ag）复合微球。所得到的Ag复合微球能够以NaBH₄作为还原剂催化亚甲基蓝（MB）的还原反应。
