摘要
利用乙酰化反应制备了乙酰化纤维素纳米晶(ACNC),研究了ACNC的添加对聚氯乙烯(PVC)膜结构和性能的影响.研究结果表明,ACNC的引入可有效调控PVC膜相分离速率,调整PVC膜的微结构,优化膜表面亲水性,提升PVC超滤膜的抗污染性能.当ACNC的添加量质量分数为1%时,PVC膜的纯水接触角降低18.3%,纯水通量提升77.6%,拉伸强度提升68.4%,通量恢复率提升59.5%,并且保持对BSA稳定的截留率(93%).
Acetylated cellulose nanocrystals(ACNC)were prepared by acylation reaction,and the effectsof the addition of ACNC on the structure and properties of PVC membrane were studied.The results showthat the introduction of ACNC can effectively adjust the phase separation forming rate of PVC membranes,the hydrophilicity of membrane materials,and regulate the microstructure of membranes.AppropriateACNC addition can reduce the pure water contact angle of the PVC membrane by 18.3%,increase the purewater flux by 77.6%,increase the tensile strength by 68.4%,and increase the flux recovery rate by59.5%,while the BSA rejection rate of the membrane remains stable.
作者
汤超
刘四华
张仁伟
厍景国
武春瑞
吕晓龙
TANG Chao;LIU Sihua;ZHANG Renwei;SHE Jingguo;WU Chunrui;LYU Xiaolong(State Key Laboratory of Separation Membranes and Membrane Processes,School ofEnvironment Science and Engineering,Tiangong University,Tianjin 300387,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2020年第5期9-15,22,共8页
Membrane Science and Technology
基金
国家自然科学基金项目(51978466)
国家自然科学基金重点项目(51638011)。
关键词
聚氯乙烯
超滤膜
纤维素纳米晶﹔乙酰化
非溶剂致相分离
polyvinyl chloride
ultrafiltration membrane
cellulose nanocrystals
acetylation
non-solventinduced phase separation method