首页|High performance photodegradation resistant PVA@TiO2/carboxyl-PES self-healing reactive ultrafiltration membrane

High performance photodegradation resistant PVA@TiO2/carboxyl-PES self-healing reactive ultrafiltration membrane

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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 con-cerns,we present an innovative design concept for composite self-healing materials based on self-cleaning UF membranes.To begin,TiO2 nanoparticles were incorporated into the polymer molecular structure via molecular design,resulting in the synthesis of TiO2/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@TiO2/carboxyl-PES self-healing reactive UF membranes.By establishing a covalent bond,the TiO2 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％TiO2/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 un-dergoing 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 self-healing 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.

Ultrafiltration membraneSelf-cleaningSelf-healingPoly(aryl ether sulfone)

Yu Liang、Yuanfang Fan、Zhongmin Su、Mingxin Huo、Xia Yang、Hongliang Huo、Chi Wang、Zhi Geng

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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

School of Science,Hainan University,Haikou 570225,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities of ChinaKey Research and Development Project of Hainan ProvinceIndustrialization Cultivation Project of Jilin Provincial Department of Education

5197813352100026U20A2032252170151519781322412021QD022ZDYF2022SHFZ298JJKH20221174CY

2024

10.1016/j.cjche.2023.11.004

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDEI
影响因子：0.818
ISSN：1004-9541
年,卷(期)：2024.66(2)
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