High performance photodegradation resistant PVA@TiO_(2)/carboxyl-PES self-healing reactive ultrafiltration membrane  

作　　者：Yu Liang Yuanfang Fan Zhongmin Su Mingxin Huo Xia Yang Hongliang Huo Chi Wang Zhi Geng 

机构地区：[1]College of Environment,Engineering Research Center of Low-Carbon Treatment and Green Development of Polluted Water in Northeast China,Ministry of Education,Northeast Normal University,Changchun 130117,China [2]School of Science,Hainan University,Haikou 570225,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第2期31-39,共9页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51978133,52100026,U20A20322,52170151,51978132);the Fundamental Research Funds for the Central Universities of China(2412021QD022);the Key Research and Development Project of Hainan Province(ZDYF2022SHFZ298);the Industrialization Cultivation Project of Jilin Provincial Department of Education(JJKH20221174CY)。

摘　　要：The occurrence of ultrafiltration(UF)membrane fouling frequently hampers the sustainable advancement of UF technology.Reactive self-cleaning UF membranes can effectively alleviate the problem of membrane fouling.Nevertheless,the self-cleaning process may accelerate membrane aging.Addressing these concerns,we present an innovative design concept for composite self-healing materials based on self-cleaning UF membranes.To begin,TiO_(2)nanoparticles were incorporated into the polymer molecular structure via molecular design,resulting in the synthesis of TiO_(2)/carboxyl-polyether sulfone(PES)hybrid materials.Subsequently,the nonsolvent-induced phase inversion technique was employed to prepare a novel of UF membrane.Lastly,a polyvinyl alcohol(PVA)hydrogel coating was applied to the hybrid UF membrane surface to create PVA@TiO_(2)/carboxyl-PES self-healing reactive UF membranes.By establishing a covalent bond,the TiO_(2)nanoparticles were effectively and uniformly dispersed within the UF membrane,leading to exceptional self-cleaning properties.Furthermore,the water-absorbing and swelling properties of PVA hydrogel,along with its capacity to form hydrogen bonds with water molecules,resulted in UF membranes with improved hydrophilicity and active self-healing abilities.The results demonstrated that the water contact angle of PVA@5%TiO_(2)/carboxyl-PES UF membrane was 43.1°.Following a 1-h exposure to simulated solar exposure,the water flux recovery ratio increased from 48.16%to 81.03%.Moreover,even after undergoing five cycles of 12-h simulated sunlight exposure,the UF membranes exhibited a consistent retention rate of over 97%,thus fully demonstrating their exceptional self-cleaning,antifouling,and selfhealing capabilities.We anticipate that the self-healing reactive UF membrane system will serve as a pioneering and comprehensive solution for the self-cleaning antifouling challenges encountered in UF membranes while also effectively mitigating the aging effects of reactive UF membranes.

关 键 词：Ultrafiltration membrane SELF-CLEANING SELF-HEALING Poly(aryl ether sulfone) 

分 类 号：TQ051.893[化学工程]