A silane-based interfacial crosslinking strategy to design PVDF membranes with versatile surface functions

作者：Wang, Yunze; Lin, Haibo; Xiong, Zhu; Wu, Ziyang; Wang, Yi; Xiang, Lingchao; Wu, Aiguo; Liu, Fu^*

来源：Journal of Membrane Science, 2016, 520: 769-778.

DOI：10.1016/j.memsci.2016.08.029

• PVDF membrane
• Interfacial crosslinking
• Superwettability
• Protein desorption
• Antibacterial

An up-scaling strategy to produce multi-functional PVDF membrane is highly desirable for both academia and industries. It is now reported that a novel silane-based interfacial crosslinking technique was developed to endow PVDF membrane with versatile superwettability, excellent protein desorption and antibacterial properties respectively. Prepolymers were first synthesized through the free radical copolymerization between crosslinker triethoxyvinylsilane (VTES) and N-Vinyl-2-pyrrolidone (NVP), oligo (ethylene)glycol methacrylate (OEGMA), dimethyl aminopropyl methacrylamide (DMAPMA). And then the superhydrophobic PVDF membrane was facilely modified by silane-based interfacial crosslinking of the corresponding prepolymer. PVP-VTES crosslinked PVDF membrane showed reversible separation performance for both oil-in-water and water-in-oil emulsions. POEGMA-VTES crosslinked PVDF membrane exhibited excellent BSA desorption. The halo zone test verified the good elimination to Escherichiacoli (E. coli) for the PDMAPMA-VTES crosslinked PVDF membrane. FTIR, XPS, TGA, SEM and laser scanning confocal microscope were utilized to investigate the chemistry and morphology of functional layer. All results demonstrate that versatile PVDF membranes with multiple functions can be facilely designed by the efficient interfacial crosslinking strategy.

• 出版日期2016-12-15
• 单位中国科学院宁波材料技术与工程研究所; 中国科学技术大学