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Understanding the Antifouling Mechanism of Zwitterionic Monomer-Grafted Polyvinylidene Difluoride Membranes: A Comparative Experimental and Molecular Dynamics Simulation Study
Liu, Zi-Yu1; Jiang, Qin1; Jin, Zhiqiang1; Sun, Zhenyu3; Ma, Wangjing1; Wang, Yanlei2
2019-04-17
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume11Issue:15Pages:14408-14417
AbstractThe antifouling process of the membrane is very vital for the highly efficient treatment of industrial wastewater, especially high salinity wastewater containing oil and other pollutants. In the present work, the dynamical antifouling mechanism is explored via molecular dynamics simulations, while the corresponding experiments about surface properties of the zwitterionic monomer-grafted polyvinylidene difluoride membrane are designed to verify the simulated mechanism. Water can form a stable hydration layer at the grafted membrane surface, where all the simulated radial distribution function of water/membrane, hydrogen bond number, water diffusivity, and experimental oil contact angles are stable. However, the water flux across the membrane will increase first and then decrease as the grafting ratio increases, which not only depends on the reduced pore size of the zwitterionic monomer-grafted membrane but also results from water diffusion. Furthermore, the dynamical fouling processes of pollutants (taking sodium alginate as an example) on the grafted membrane in water and brine solution are investigated, where both the high grafting ratio and electrolyte CaCl2 can enhance the fouling energy barrier of the pollutant. The results show that both the enhanced hydrophilic property and the electrostatic repulsion can affect the antifouling capability of the grafted membrane. Finally, the ternary synergistic antifouling mechanisms among the zwitterionic membrane, electrolyte, and pollutant sodium alginates are discussed, which could be helpful for the rational design and preparation of new and highly efficient zwitterionic antifouling membranes.
Keywordzwitterionic membrane antifouling mechanism alginates molecular dynamics simulation electrolyte electrostatic repulsion
DOI10.1021/acsami.8b22059
Language英语
WOS KeywordREVERSE-OSMOSIS MEMBRANES ; POLY(VINYLIDENE FLUORIDE) ; PVDF MEMBRANES ; FOULING PROPERTIES ; WATER ; SURFACE ; PERFORMANCE ; COPOLYMER ; BEHAVIOR ; BLEND
Funding ProjectNational Natural Science Foundation of China[21606245] ; National Natural Science Foundation of China[21808220] ; National Science and Technology Major Project[2016ZX05011-003] ; Beijing Natural Science Foundation[2184124]
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China ; National Science and Technology Major Project ; Beijing Natural Science Foundation
WOS IDWOS:000465189000067
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28236
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Zi-Yu; Wang, Yanlei
Affiliation1.Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Key Lab Green Proc & Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc,Inst Proc, Beijing 100190, Peoples R China
3.Beijing Univ Chem Technol, Coll Chem Engn, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Liu, Zi-Yu,Jiang, Qin,Jin, Zhiqiang,et al. Understanding the Antifouling Mechanism of Zwitterionic Monomer-Grafted Polyvinylidene Difluoride Membranes: A Comparative Experimental and Molecular Dynamics Simulation Study[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(15):14408-14417.
APA Liu, Zi-Yu,Jiang, Qin,Jin, Zhiqiang,Sun, Zhenyu,Ma, Wangjing,&Wang, Yanlei.(2019).Understanding the Antifouling Mechanism of Zwitterionic Monomer-Grafted Polyvinylidene Difluoride Membranes: A Comparative Experimental and Molecular Dynamics Simulation Study.ACS APPLIED MATERIALS & INTERFACES,11(15),14408-14417.
MLA Liu, Zi-Yu,et al."Understanding the Antifouling Mechanism of Zwitterionic Monomer-Grafted Polyvinylidene Difluoride Membranes: A Comparative Experimental and Molecular Dynamics Simulation Study".ACS APPLIED MATERIALS & INTERFACES 11.15(2019):14408-14417.
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