摘要
首先合成了含有高分子链段聚乙二醇(PEG-400)结构的聚合物单体聚(1,4-苯二甲酸二肼-2,5-聚乙二醇)(DTH-400),然后通过2,5-二乙氧基对苯二甲酰肼(DTH)、DTH-400、三醛基间苯三酚(Tp)界面聚合法,制备了含有PEG-400链段的PolyDTH-400_(x)/羧基化聚丙烯腈(CPAN)复合纳滤膜(简称PolyDTH-400_(x)/CPAN膜,其中x为DTH-400物质的量与DTH-400和DTH物质的量之和的比值,下同),并探究了n(DTH-400)∶n(DTH)对膜的孔径以及染料分离性能的影响。结果表明,高分子链的引入不仅有效地缩小了共价有机骨架材料分离层的孔径,而且提高了PolyDTH-400_(x)/CPAN膜的结晶性能和机械性能,使其具有良好的力学性能和热稳定性。当n(DTH-400)∶n(DTH)=1∶2时,制备的PolyDTH-4001/3/CPAN膜性能最佳,其对考马斯亮蓝R-250的截留率达99.86%,纯水通量为25.2 L/(m^(2)·h·10^(5)Pa)。
Poly(1,4-phenylenedihydrazine-2,5-ethyl glycol)(DTH-400)containing polyethylene glycol(PEG-400)segment structure was firstly synthesized,and PolyDTH-400_(x)/carboxylated polyacrylonitrile(CPAN)composite nanofiltration membranes for short PolyDTH-400_(x)/CPAN membranes(herein,x is the molar ratio of DTH-400 to DTH-400 and DTH,the same as below)containing PEG-400 segment were then prepared from interfacial polymerization of 2,5-diethoxyterephthaloyl hydrazide(DTH),DTH-400 and trialdehyde phloroglucinol(Tp).The effect of n(DTH-400)∶n(DTH)on the pore size and the dye separation performance of membrane obtained were analyzed.The results showed that the introduction of polymer chains not only effectively reduced the pore size of the separation layer of covalent organic framework material,but also improved the crystallization and mechanical properties of PolyDTH-400_(x)/CPAN membranes.When n(DTH-400)∶n(DTH)was 1∶2,the prepared PolyDTH-4001/3/CPAN membrane exhibited the best performance.The rejection rate of PolyDTH-4001/3/CPAN membrane for Coomassie brilliant blue R-250 was 99.86%,and the pure water flux was 25.2 L/(m^(2)·h·10^(5)Pa).
作者
崔昕皓
赵亚欣
周延红
淡玄玄
蒋琨
王贺云
CUI Xinhao;ZHAO Yaxin;ZHOU Yanhong;DAN Xuanxuan;JIANG Kun;WANG Heyun(College of Chemistry and Chemical Engineering,Shihezi University,Shihezi 832003,Xinjiang,China;Xinjiang Tianye(Group)Co.,Ltd.,Shihezi 832003,Xinjiang,China)
出处
《精细化工》
北大核心
2025年第10期2115-2123,共9页
Fine Chemicals
基金
国家自然科学基金地区基金项目(22168033)
兵团揭榜挂帅项目(2023AA006)。
关键词
共价有机骨架材料
复合纳滤膜
聚合物单体
孔径调控
染料分离
功能材料
covalent organic framework materials
composite nanofiltration membranes
polymer monomers
pore size regulation
dye separation
functional materials
