Preparation, characterization and acid/alkali stabilities of aromatic polyesteramide-based composite membranes for water desalination

被引：12

作者：

Chen, Pengfei ^{[1
]}

Qu, Yunfei ^{[1
]}

Meng, Lida ^{[1
]}

Jiao, Lei ^{[1
]}

Lu, Jiancong ^{[1
]}

Lu, Jianguo ^{[2
]}

机构：

[1] Zhejiang Univ, Ocean Coll, Zhoushan 316021, Peoples R China

[2] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2021年 / 269卷

基金：

中国国家自然科学基金;

关键词：

Acid; Alkali; Free volume; Polyamide; Polyesteramide; REVERSE-OSMOSIS MEMBRANES; POLYAMIDE; NANOFILTRATION; MICROPOROSITY; TECHNOLOGY; PERMEATION; SEPARATION; NANOFILMS; FLUX;

D O I：

10.1016/j.seppur.2021.118739

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A novel aromatic polyesteramide-based membrane with high free volume for water desalination was prepared by adding a rigid cardo-contorted biphenol monomer to the aqueous phase solution of m-phenylenediamine (MPD) and then carrying out the interfacial polymerization. Compared with the polyamide (PA) membrane, the polyesteramide membrane with high free volume and ultrathin separating layer exhibited 250% increase in flux and 1.2% loss in salt rejection. Moreover, acid and alkali stabilities of polyesteramide membranes were studied by immersing the polyesteramide membranes into acid, aid/ethyl alcohol (EA), alkali and alkali/EA aqueous solutions. After acid/alkali treatments, the surface contact angles of acid/alkali-treated PA/9,9-bis(4-hydroxyphenyl)fluorine (PA/BHPF) membranes were much smaller than the pristine PA/BHPF membrane. With EA, both the acid/EA-treated and alkali/EA-treated polyesteramide membranes exhibited a significant increase in water flux; moreover, the acid/EA-treated membranes showed a simultaneous increase in water flux and salt rejection within a treatment time of 24 h, due to the increase in hydrophilicity and the partial dissolution of small polymer fragments on membrane surface.

引用

页数：7

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