新型分盐纳滤膜的制备与表征
作者:史乐,刘四华,厍景国,阎安,王昌萌,武春瑞,吕晓龙
单位: 省部共建分离膜与膜过程国家重点实验室,材料科学与工程学院,天津工业大学,天津 300387
关键词: 中空纤维纳滤膜;界面聚合;高哌嗪;结构与性能;分盐
分类号: TQ028.8
出版年,卷(期):页码: 2021,41(4):1-7

摘要:
 设计界面聚合反应单体结构,调节界面聚合反应参数,是实现纳滤膜结构和性能调控的有效手段。本研究针对Na2SO4/NaCl高效分离需求,以高哌嗪(HPIP)为水相单体,均苯三甲酰氯(TMC)为有机相单体,通过界面聚合反应制备了具有高Na2SO4/NaCl选择性的中空纤维纳滤膜。通过优化HPIP浓度,调节分离层的结构,可以实现纳滤膜分离性能的有效调控。当HPIP浓度为3g·L-1时,纳滤膜具有最佳的Na2SO4/NaCl选择性,该纳滤膜对Na2SO4和NaCl的截留率分别为98.0%和14.2%,Na2SO4/NaCl选择性为6.9,渗透通量为39.7 L·m-2·h-1。
  Designing the structure of the reactive monomer for interfacial polymerization and adjusting the parameters of interfacial polymerization are effective means to realize the regulation of the structure and performance of the nanofiltration membrane. Aiming at the requirement of efficient separation of Na2SO4/NaCl, a hollow fiber nanofiltration membrane which had high selectivity for Na2SO4/NaCl was prepared by interfacial polymerization using homopiperazine (HPIP) as the aqueous phase monomer and trimethyl chloride (TMC) as the organic phase monomer in this work. The separation performance of nanofiltration membrane can be effectively controlled by optimizing the concentration of HPIP and adjusting the structure of separation layer. The nanofiltration membrane has the best selectivity for Na2SO4/NaCl when the concentration of HPIP is 3g·L-1, the rejection for Na2SO4 and NaCl of which are 98.0% and 14.2%, respectively. The selectivity for Na2SO4/NaCl is 6.9, and the permeation flux is 39.7 L·m-2·h-1.

基金项目:
国家自然科学基金面上项目(51978466);国家自然科学基金重点项目(51638011)

作者简介:
史乐(1996-),女,河北石家庄,硕士研究生,研究方向为复合纳滤膜研制;E-mail:shile2027@qq.com

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