摘要
将聚乙二醇（ＰＥＧ）分别与明胶（ＧＬＴ）、聚丙烯酰胺（ＰＡＭ）及聚乙烯醇（ＰＶＡ）等成膜高分子共溶于水中，制备亲水性高分子共混膜．对膜的微相结构和渗透蒸发脱盐性能进行了研究．结果表明，ＰＶＡ为理想的成膜聚合物．乙酸钠的引入改变了ＰＶＡ－ＰＥＧ体系的高分子网络结构和膜形态结构，提高了膜的通量．在５５℃时，其水通量为１４ｋｇ／（ｍ２·ｈ），并具有极高的一次分离度．
Hydrophilic polymer membranes were prepared by blending poly-ethyleneglycol(PEG) with gelatin(GLT)or polyacrylamide (PAM) or polyvinylalcohol(PVA).The membranes were applied in desalination by a pervaporation approach.The results show that PVA is a preferable matrix for forming membrane.With the introduction of sodium ions,the morphology of the polymer network and thus the property of the PVA-PEG membrane changed obviously.The flux of the membrane improved significantly, reaching 14kg/(m 2·h),with a high degree of desalination in the first run at 55℃.The microstructure and other properties of the membranes were investigated.
出处
《膜科学与技术》
CAS
CSCD
1999年第1期40-44,共5页
Membrane Science and Technology
基金
湖南省科委攻关项目
关键词
渗透蒸发
脱盐
亲水性
高分子膜
膜分离
pervaporation desalination hydrophilic polymer membrane
