芳香叔胺功能化聚丙烯中空纤维膜的制备与研究  

Preparation and study of aromatic tertiary amine functionalized polypropylene hollow fiber membrane

作　　者：李浩[1] 杨景皓 张世韬 刘衡 李明远[1] 蔡正国[1] 陈龙[1] 孙俊芬[1] LI Hao;YANG Jinghao;ZHANG Shitao;LIU Heng;LI Mingyuan;CAI Zhengguo;CHEN Long;SUN Junfen(State Key Laboratory of Advanced Fiber Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;Hubei Botao Synthetic Fiber Co.,Ltd.,Jingmen 448002,China)

机构地区：[1]东华大学先进纤维材料全国重点实验室,材料科学与工程学院,上海201620 [2]湖北博韬合纤股份有限公司,荆门448002

出　　处：《膜科学与技术》2025年第2期20-29,共10页Membrane Science and Technology

基　　金：中央高校基本科研业务费专项资金。

摘　　要：本研究通过本体改性的策略,将芳香叔胺基团引入聚丙烯(PP),合成了芳香叔胺基团含量(摩尔分数)为2%、2.5%、3.3%的聚丙烯共聚物PP[N(hexenol)]Ph2(PPPH),制备了具有亲水性能的PPPH中空纤维膜。采用核磁共振氢谱(NMR)、傅里叶变换红外光谱(FTIR)及扫描电子显微镜(SEM)对膜的化学结构与表面形貌进行了详尽表征;同时,利用热重分析(TGA)、接触角测量及力学性能测试对膜的综合性能进行了系统评估。结果表明,芳香叔胺基团的引入提高了PP中空纤维膜的亲水性能及热稳定性能。当芳香叔胺基团的含量为3.3%时,水接触角降低到76°,PPPH中空纤维膜的热分解温度提升至450℃,PPPH中空纤维膜的孔径为125 nm,孔隙率为38.7%,断裂强度为65.0 MPa,断裂伸长率为433.0%。改性后的中空纤维膜的纯水通量达到了385.0 L/(m^(2)·h),是PP中空纤维膜纯水通量的1.6倍。此外,PPPH中空纤维膜在高浓度盐溶液以及碱性溶液环境中均表现出良好的化学稳定性。In this study,polypropylene copolymer PP[N(hexenol)]Ph 2(PPPH)with aromatic tertiary amine group contents(mole fraction)of 2%,2.5%and 3.3%were synthesized by bulk modification strategy,and PPPH hollow fiber membranes with hydrophilic properties were synthesized by introducing aromatic tertiary amine groups into polypropylene(PP).Nuclear magnetic resonance hydrogen spectroscopy(NMR),Fourier transform infrared spectroscopy(FTIR),and scanning electron microscopy(SEM)were used to characterize the chemical structure and surface morphology of the membranes.At the same time,thermogravimetric analysis(TGA),contact angle measurement and mechanical property test were used to systematically evaluate the comprehensive properties of the membranes.The results showed that the introduction of aromatic tertiary amine groups improved the hydrophilic performance and thermal stability of PP hollow fiber membranes.When the content of the aromatic tertiary amine group was 3.3%,the water contact angle was reduced to 76℃,the thermal decomposition temperature of PPPH hollow fiber membrane was increased to 450℃,the pore size of PPPH hollow fiber membrane was 125 nm,the porosity was 38.7%,the breaking strength was 65.0 MPa,and the elongation at break was 433.0%.The pure water flux of the modified hollow fiber membrane reached 385.0 L/(m^(2)·h),which was 1.6 times that of the PP hollow fiber membrane.In addition,PPPH hollow fiber membranes exhibit good chemical stability in both high-concentration salt solution and alkaline solution environments.

关 键 词：本体改性 亲水改性 聚丙烯中空纤维膜 芳香叔胺 

分 类 号：TQ028[化学工程]