N-异丙基丙烯酰胺接枝聚乙烯微孔膜的结构形态和动电现象

膜科学与技术 , 2003, 23(1): 1-6. doi: 10.3969/j.issn.1007-8924.2003.01.001

N-异丙基丙烯酰胺接枝聚乙烯微孔膜的结构形态和动电现象

齐旺顺 ^1, , 王晓琳 ^2, , 黄健 ^3, , 余学海 ^4,

1.南京工业大学材料科学与工程学院,南京,210009

2.清华大学化学工程系,北京,100084

3.南京大学化学化工学院,北京,210093

4.南京大学化学化工学院,北京,210093

关键词： N-异丙基丙烯酰胺 , 聚乙烯微孔膜 , 流动电位

Configuration and electrokinetic phenomena of N-isopropylacrylamide grafted polyethylene microporous membranes

用等离子体接枝法,在聚乙烯(PE)微孔膜上,接枝了具有温敏性的聚N-异丙基丙烯酰胺(PNIPAAm).X射线电子能谱(XPS)、红外光谱(FT-IR)测试表明,PNIPAAm接枝链同时存在于N-异丙基丙烯酰胺接枝聚乙烯(NIPAAm-g-PE)温敏性接枝膜的微孔外表面及膜孔内部,接枝链在低临界溶解温度(LCST)32 ℃上下具有不同的形态结构.透过实验表明,接枝膜的水通量在LCST附近发生了5倍以上的急剧变化.流动电位研究表明,温度低于LCST时,接枝膜微孔表面zeta电位和电荷密度为较小的负值;温度高于LCST时,zeta电位和电荷密度仍为负值,但其绝对值急剧增加,并且随温度的升高继续增加.

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N-异丙基丙烯酰胺接枝聚乙烯微孔膜的结构形态和动电现象

Configuration and electrokinetic phenomena of N-isopropylacrylamide grafted polyethylene microporous membranes

参考文献