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 dete...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.展开更多
文摘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.
