摘要
以聚砜为支撑基膜,以间苯二甲胺(m-XDA)和均苯三甲酰氯(TMC)为复合单体,经界面聚合反应制备聚酰胺复合正渗透膜。研究了聚酰胺复合正渗透膜的制备条件对膜性能的影响,并考察其耐氯性和抗污染能力。实验结果表明,选择合适的制备参数,16%PSf、6%PVP、60s挥发时间、40℃水浴、0.5%m-XDA、0.05%TMC、反应时间120s,制备出的复合正渗透膜性能优良。以去离子水为原料液,1mol/L NaCl为汲取液时的水通量最高达到17.5L/(m^2·h),反向扩散通量基本上在1.7mol/(m^2·h),对NaCl截留率为90%以上。在HA模拟溶液中,复合正渗透膜的水通量较正常情况下明显下降,再进一步比较pH值=5.5和8.0时可见,pH值较低时污染更为严重。对复合正渗透膜的耐氯性能进行考察,结果表明,复合正渗透膜的耐氯性在2 000ppmh左右。
The composite FO membrane was prepared through interfacial polymerization withm-xylylenediamine and trimesoyl chloride supported by PSf membrane.In this paper,the studies were focused on preparation and characterization of the FO composite membrane.The optimized parameters forcomposite FO membrane were 16%PSf,6%PVP,60 s evaporation time,40 ℃ water bath and 0.5%m-XDA,0.05% TMC,120 s reaction time.When deionized water is served as feed solution and 1 mol/L NaCl as draw solution,thewater flux of the FO composite membrane can reach to 17.5 L/（m2 . h ） and the solute reverses diffusion flux is 1.7 mol/（m2 .h）,the membrane rejection of NaCl is about 90%.In the HA simulated solution,the water flux of composite FO membranewas decreased.After a further contrast of pH=5.5 and pH=8.0,a fact was con-firmed that lower pH value accompanies with more severe pollution.Studieson chlorine resistance of the com-posite FO membrane was shown that the chlorine resistance capacity of the composite FO membrane was up to 2 000 ppmh.
作者
肖维溢
管盼盼
王铎
XIAO Weiyi GUAN Panpan WANG Duo(College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2016年第B06期127-133,共7页
Journal of Functional Materials
基金
国家自然科学基金资助项目(20976171)
关键词
正渗透
复合膜
聚酰胺
耐氯性
耐污染性
forward osmosis
composite membrane
polyamide
resistance to fouling
chlorine resistance
