文献类型：期刊文献

中文题名：NMP/GTA配比对CDA反渗透膜结构与性能影响

英文题名：Effect of NMP/GTA Ratio on the Structure and Properties of CDA Reverse Osmosis Membranes

作者：谢高艺 苏相樵 杨敬葵 邵会菊 张敏敏 张凯舟 罗大军 秦舒浩

第一作者：谢高艺

机构：[1]贵州省材料产业技术研究院;[2]贵州理工学院化学工程学院

第一机构：贵州省材料产业技术研究院,贵阳550014

年份：2018

卷号：46

期号：1

起止页码：1-4

中文期刊名：工程塑料应用

外文期刊名：Engineering Plastics Application

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金：贵州省科学技术基金项目;黔科合J字[2015]2078号

语种：中文

中文关键词：二乙酸纤维素;稀释剂配比;复合相分离

外文关键词：cellulose diacetate; diluent ratio; complex phase separation

摘要：以二乙酸纤维素(CDA)为成膜基质,一定比例的N-甲基吡咯烷酮(NMP)/三乙酸甘油酯(GTA)为稀释剂,聚乙二醇400(PEG400)为致孔剂,采用复合相分离法来制备CDA平板膜,考察了NMP/GTA配比对CDA平板膜结构与性能的影响。实验结果表明,随着稀释剂中GTA含量的增加,膜横断面大的指状孔数目先减少后增加,小蜂窝孔的孔径增加;水通量总体呈下降趋势,与此同时脱盐率(Na Cl)上升后趋于平缓;膜表面的水接触角增大,意味着膜的亲水性随GTA含量的增加而下降;随着NMP/GTA配比的减小,CDA平板膜的拉伸强度先增大后降低。该CDA平板膜可作为后续热处理和交联的基膜。
Cellulose diacetate （CDA） flat sheet membranes were prepared by complex phase separation technique,using N-methyl-2-pyrrolidone （NMP）/glycerol triacetate （GTA） and PEG400 as diluent and pore-foaming agent,respectively. The influence of NMP/GTA ratio on microstructure and properties of CDA membranes were studied. The results show that with the increasing of GTA content,the number of finger hole first decreases and then increases,the diameter of small honeycomb pores increases. The water flux decreases, while the salt rejection （NaCl） firstly increases and then approaches to a flat. With the decreasing of NMP/GTA ratio,the water contact angle of CDA membrane surfaces increases, implying that the hydrophily of the membranes weakened. Meanwhile,the mechanical strength of CDA membranes first increases and then decreases. These CDA flat sheet membranes can be used as substrates that would be thermally cross-linked.