洗滤-萃取法去除原子转移自由基聚合法制备PMMA-b-PLLA-b-PMMA嵌段聚合物中的Cu离子  

Removal of Cu-ion in Block Copolymer of PMMA-bPLLA-b-PMMA Prepared via Atom Transfer Radical Polymerization by Washing-extraction Method

作　　者：仲玉[1] 沈珺[1] 魏荣卿[1] 刘晓宁[1] 

机构地区：[1]南京工业大学生物与制药工程学院,南京210009

出　　处：《应用化学》2011年第3期254-257,共4页Chinese Journal of Applied Chemistry

基　　金：国家高技术研究发展计划("863"计划)(2007AA02Z200;2007AA06A402)资助项目

摘　　要：采用洗滤-萃取法去除原子转移自由基聚合法(ATRP)制备的聚甲基丙烯酸甲酯-聚L-乳酸-聚甲基丙烯酸甲酯(PMMA-b-PLLA-b-PMMA)嵌段共聚物中残留金属Cu离子。结果表明,采用二氯甲烷(DCM)溶解共聚物,用水或酸水洗滤-萃取,当重复洗滤-萃取5次后,Cu离子的去除率能达到99%,所得嵌段共聚物的收率高于80%。与过Al2O3层析柱或溶剂溶解-沉淀方法相比,洗滤-萃取法操作简单、可节省大量的有机溶剂,具有工业化前景。This paper developed a washing-extraction method to remove the residual Cu-ion from the triblock eopolymer of poly （ methyl methacrylate） -b-poly （ L-lactic acid ） -b-poly （ methyl methacrylate ） （ PMMA-b-PLLA- b-PMMA） prepared via atom transfer radical polymerization （ATRP）. The result is that, when taking dichloromethane（DCM） as the solvent and water or acid as the extractant, the rate of removing Cu-ion can reach as much as 99% and the yield of the block copolymerization was more than 80% followed by washing and extracting 5 times. Compared with other methods, the washing-extraction method can not only save lots of organic solvent, but is also simple and effective. In addition, the washing-extraction method is a green technology, which might be used in the industry.

关 键 词：原子转移自由基聚合 聚甲基丙烯酸甲酯-聚L-乳酸-聚甲基丙烯酸甲酯 Cu离子的去除 洗滤-萃取法 

分 类 号：O631.5[理学—高分子化学]