两亲接枝共聚物PECA-g-PEG胶束的CMC及表面带电性  

CMC and Surface Electric Charge of Amphiphilic PECA-g-PEG Micelles

作　　者：赵锦花[1] 孙多先[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《应用化学》2004年第8期844-846,共3页Chinese Journal of Applied Chemistry

摘　　要：The critical micelle concentration(CMC) value and surface charge of the amphiphilic graft copolymer PECA-g-PEG micelles(PECA:polyethyl cyanoacrylae, PEG:polyethylene glycol) are reported. CMC of the copolymers is determined from the absorbance change of bromophenol blue solution as function of copolymer concentration, which is about 1×10 -6 mol/L. The critical coagulation concentration (cz c) of electrolytes with different valence(z) for the copolymer micelles are examined by visual method and compared with that obtained by experiential formula cz c∝z -6. The relation formula for different cations is deduced:cz c∝z -4, which indicates the electronegative character of the micelle surface.The critical micelle concentration(CMC) value and surface charge of the amphiphilic graft copolymer PECA-g-PEG micelles(PECA:polyethyl cyanoacrylae, PEG:polyethylene glycol) are reported. CMC of the copolymers is determined from the absorbance change of bromophenol blue solution as function of copolymer concentration, which is about 1×10 -6 mol/L. The critical coagulation concentration (cz c) of electrolytes with different valence(z) for the copolymer micelles are examined by visual method and compared with that obtained by experiential formula cz c∝z -6. The relation formula for different cations is deduced:cz c∝z -4, which indicates the electronegative character of the micelle surface.

关 键 词：两亲共聚物 聚氰基丙烯酸乙酯-g-聚乙二醇 胶束 临界胶束浓度 聚沉 

分 类 号：O648[理学—物理化学]