Fabrication of high-performance PVA/PAN composite pervaporation membranes crosslinked by PMDA for wastewater desalination
Fabrication of high-performance PVA/PAN composite pervaporation membranes crosslinked by PMDA for wastewater desalination作者机构:College of Materials Science and Engineering Beijing University of Chemical Technology
出 版 物:《Petroleum Science》 (石油科学(英文版))
年 卷 期:2018年第15卷第1期
页 面:146-156页
核心收录:
学科分类:0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 081704[工学-应用化学] 08[工学] 0820[工学-石油与天然气工程] 083002[工学-环境工程] 0830[工学-环境科学与工程(可授工学、理学、农学学位)] 0707[理学-海洋科学] 0817[工学-化学工程与技术] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0827[工学-核科学与技术] 081701[工学-化学工程] 0813[工学-建筑学] 0703[理学-化学] 0814[工学-土木工程] 0825[工学-航空宇航科学与技术] 0704[理学-天文学]
基 金:supported by the Higher Education and High-quality and World-class Universities (PY201618) the National Natural Science Foundation of China (Contract Grant Number 51373014) the National Natural Science Foundation of China (Contract Grant Number 51403012)
主 题:Pervaporation - Desalination Crosslinked PVA Composite membranes Wastewater treatment
摘 要:The pyromellitic dianhydride(PMDA) crosslinked poly(vinyl alcohol)(PVA) was coated on top of the PAN ultrafiltration membrane to form a PVA/PAN composite PV membranes for wastewater desalination. The composite membranes have high application value in industrial wastewater treatment. By varying the membrane fabrication parameters including the weight percent(wt%) of the PMDA, the crosslink temperature and duration, membrane with the best desalination performance was obtained. The composite membrane with a 2-lm-thick PVA selective layer containing 20 wt% of PMDA and being crosslinked at 100 °C for 2 h showed the highest Na Cl rejection of 99.98% with a water flux of 32.26 L/(m^2 h)at 70 °C using the 35,000 ppm Na Cl aqueous solution as feed. FTIR spectroscopy, wide-angle X-ray diffraction, thermogravimetric analysis and scanning electron microscope have been used to characterize the structures and properties of both the crosslinked PVA dense films and PVA/PAN composite membranes. The effects of the concentrations of PMDA,the crosslinking time and temperature to the membrane water contact angle, swelling degree, salt rejection and water flux were systematically studied.