共聚物Poly(DMAEMA-co-TPE-a)的合成及pH敏感荧光多孔光纤制备

将甲基丙烯酸N,N-二甲氨乙酯(DMAEMA)和微量荧光单体4-丙烯酰氧基四苯乙烯(TPE-a)经自由基共聚合制备了共聚物Poly(DMAEMA-co-TPE-a)(PDT),并通过引入交联剂N,N-亚甲基双丙烯酰胺(Bis)和致孔剂N,N-二甲基甲酰胺(DMF)制备了pH敏感荧光多孔光纤。采用FT-IR、~1 H-NMR、TG和SEM表征了产物的结构,研究了产物的荧光和pH响应性能。研究表明,共聚物PDT具有聚集诱导发光(AIE)效应,并具有较好的pH响应性能;当单体、交联剂和致孔剂的物质的量之比为60∶1∶40时,制备的pH敏感荧光多孔光纤具有较好的耐热性能、内部结构和pH响应性能。

Synthesis of Copolymer Poly(DMAEMA-co-TPE-a) and Preparation of pH-Sensitive Fluorescent Porous Fiber

Poly(DMAEMA-co-TPE-a)(PDT) was synthesized by radical copolymerization of N-(2-(dimethylamino) ethyl)-methacrylamide (DMAEMA) and trace fluorescent monomer 4-acryloyl tetraphenylethylene (TPE-a).The pH-sensitive fluorescent porous fiber was then prepared via introducing cross-linking agent methylene-bis-acrylamide (Bis) and porogenic agent N,N-dimethylformamide (DMF)into the system.The products were characterized by FT-IR,1 H-NMR,TG and SEM.The fluorescent property and pH-response performance of products were also studied.Results show that PDT owns aggregation-induced emission(AIE) effect and good pH-response performance.When the molar ratio of monomer,cross-linking agent and porogenic agent is 60 ∶ 1 ∶ 40,the obtained fiber showed a satisfing heatresistant quality and pH response performance.