【摘要】 采用球磨机对聚氯乙烯(PVC)进行力化学改性,在铸膜液温度60℃下经相转化法制备了力化学改性前后PVC膜,将改性后PVC膜在盐酸溶液、次氯酸钠溶液以及氢氧化钠溶液中进行后处理,对处理前后PVC膜的水通量和力学性能进行分析.结果表明:改性后PVC膜具有良好的耐酸碱性;NaClO溶液具有强氧化性,它产生的极性基团使改性后PVC膜的表面更加亲水,导致膜的水通量由377.88 L/(m2·h)提高到431.30L/(m2·h);同时使PVC膜的皮层变薄,这导致了膜的拉伸强度有所下降.更多还原

【Abstract】 A ball mill was used to mechanochemically modify polyvinylchloride(PVC) powders. The PVC membranes were prepared using pristine and modified PVC powders by phase inversion method at temperature of 60 ℃. The modified PVC membrane was immersed in HCl solution, NaClO solution and NaOH solution, which permeate flux and mechanical properties before and after post-treatment were studied. The results showed that the modified PVC membrane owned good ability of resistance to acid and alkali. The strong oxidizing NaClO solution generated the polar groups on the surface of PVC membrane made it to be more hydrophilic and the permeation of PVC membrane increased from 377.88 L/(m2·h) to 431.30 L/(m2·h). At the same time, it made the skin layer of PVC membrane to be thinner and the tensile strength a litter lower.更多还原