对位芳香族聚酰胺复合纳滤膜制备及高温纳滤性能
Preparation and thermal resistance performance for PPTA composite nanofiltration membrane
王纯 1赖星 2颜鼎荷 3付梦洁 2郑文丽2
作者信息
- 1. 上海工程技术大学,纤维材料研究中心,上海,201620;天津工业大学,省部共建分离膜与膜过程国家重点实验室,天津,300387
- 2. 上海工程技术大学,纤维材料研究中心,上海,201620
- 3. 天津工业大学,省部共建分离膜与膜过程国家重点实验室,天津,300387;中化高性能纤维材料有限公司,扬州,211400
- 折叠
摘要
本文以对位芳香族聚醜胺(PPTA)超滤膜为基膜,无水哌嗪(PIP)与1,3,5-苯三甲酿氯(TMC)分别作为水相单体和油相单体,采用界面聚合法制得高通量耐热PPTA/PA复合纳滤膜.研究了反应条件对PPTA/PA复合纳滤膜高温纳滤性能影响,观察了复合纳滤膜表面形貌与致密层结构,考察了渗透通量、耐热性以及抗污染等性能.结果表明,当PIP浓度为15％wt,TMC浓度为2.5％wt,热处理温度和时间分别为60℃和8min时,所得PPTA/PA复合纳滤膜对不同染料分子截留率可达95％以上,对二价盐截留率可达90％以上.在高温条件下,所得PPTA/PA复合纳滤膜表现出优良的染料脱盐性能,在刚果红染料与Na2SO4截留率保持在99％的同时,渗透通量可达50L·m-2·h-1·MPa-1以上.
Abstract
In this paper,high flux heat-resistant PPTA/PA composite nanofiltration membranes were prepared by interfacial polymerization using para-aromatic polyamide(PPTA)ultrafiltration membrane as the base membrane and Piperazine(PIP)and trimesoyl chloride(TMC)as the aqueous and oil phase monomers,respectively.The effects of interfacial polymerization on the high-temperature nanofiltration performance of PPTA/PA composite nanofiltration membranes were investigated.The surface morphology and dense layer structure of the composite nanofiltration membranes were observed,and the permeance,heat resistance and anti-pollution properties were investigated.The results showed that when the PIP concentration was 15％wt,the TMC concentration was 2.5％wt,the heat treatment temperature and time were 60℃and 8 min,respec-tively,the PPTA/PA composite nanofiltration membrane could retain more than 95％of rejection for different dye molecules and more than 90％of rejection for divalent salts,Under high temperature conditions,the obtained PPTA/PA composite nanofiltration membranes exhibited excellent dye desalination performance,and the permeate flux could reach more than 50 L·m-2·h-1·MPa-1while the rejection rate of Congo red and Na2SO4 remained at 99％.
关键词
对位芳香族聚酰胺/界面聚合/复合纳滤膜/耐高温Key words
PPTA/interfacial polymerization/nanofiltration membrane/heat-resistance引用本文复制引用
基金项目
国家自然科学基金(21808165)
江苏省科技研发项目(BE20220041)
大学生创新创业训练计划项目(CX2209013)
出版年
2024
NETL
NSTL
万方数据