Titanate nanotubes-embedded chitosan nanocomposite membranes with high isopropanol dehydration performance

Publication year: 2011
Source: Chemical Engineering Science, In Press, Accepted Manuscript, Available online 13 June 2011

Guanxiao, Liu , Dong, Yang , Yuanyuan, Zhu , Jing, Ma , Mingcheng, Nie , …

Titanate nanotubes (TNTs) are prepared by a hydrothermal method, and then modified with poly(aspartic acid). Subsequently, they are incorporated into the chitosan (CS) to fabricate the modified TNTs (MTNTs)-embedded chitosan hybrid membranes supported by the polyacrylonitrile (PAN) membrane (CS-MTNTs/PAN) and utilized for isopropanol dehydration. The physicochemical properties including physical morphology, chemical interaction, hydrophilicity, crystallinity, thermal stability and free volume of CS-MTNTs hybrid separation layers are characterized by SEM, FTIR, water contact angle, XRD, TG and PALS analysis, respectively. It is found that the modificatoin of poly(aspartic acid) can apparently improve the interfacial morphology and compatibility between TNTs and membrane matrix….

 Highlights: ► Titanate nanotube via hydrothermal method is modified with poly(aspartic acid). ► Modified nanotubes are filled into chitosan matrix to fabricate hybrid membranes. ► The membranes displayed high separation performance in isopropanol dehydration.