摘要
利用化学接枝方法在膜的表面引入亲水基团,提高膜的抗污染能力。通过过硫酸钾(K2S2O8)羟基化预处理、铈盐引发丙烯酰胺(AAm)对聚砜(PSF)膜进行亲水化改性,研究了预处理温度、时间以及接枝反应水浴温度的变化对接枝反应的影响;并采用X射线光电子能谱(XPS)和全反射红外光谱(ATR-FTIR)对接枝前后聚砜膜进行表征,用扫描电子显微镜(SEM)观察接枝前后聚砜膜的形貌变化。结果表明,在羟基化预处理温度为40℃,处理时间2h,接枝反应温度为40℃时,接枝改性后的聚砜膜表面水接触角能够降低到29°左右。
Chemical grafting has been employed to introduce hydrophilic groups onto a polysulfone membrane, in an attempt to improve its hydrophilicity and anti-fouling capability. Acrylamide graft copolymerization was initiated by Ce^4＋/OH^- on the membrane surface after pre-treatment with K2S208. XPS and ATR-FTIR analysis showed that acrylamide （AAm） was successfully grafted onto the PSF membrane surface, and the surface morphology of the membrane after grafting was visualized by SEM. The effects of varying the pre-treatment temperature, pre-treatment time and grafting reaction temperature on the grafting reaction were also studied. For a pretreatment temperature of 40 ℃, pre-treatment time of 2 h, and grafting reaction temperature of 40 ℃, the water contact angle of the grafted membrane surface can be reduced to about 29℃. The results showed that this method could be effectively used to improve the hydrophilicity of the polysulfone membrane.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第3期65-70,共6页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
关键词
聚砜膜
丙烯酰胺
接枝改性
亲水性
polysulfone membrane
acrylamide
grafting modification
hydrophilicity
