Enhancing mechanical strength of polyvinylindene fluoride ultrafiltration membrane via biomimetic mineralization and study on its anti-compression properties
XU Ji-bin, KANG Xue-ting, CHEN Bing-chen, BAI Yun-xiang, DONG Liang-liang, ZHANG Chun-fang
Key Laboratory of Synthetic and Biological Colloids of the Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
Abstract: Mineralized PVDF/ZrO2 membrane is prepared through modifying inorganic ZrO2 mineralized layer on the surface and pore wall of PVDF ultrafiltration membrane by biomimetic mineralization technology.The effects of mineralization time on the microstructure,mechanical strength and anti-compression properties of the membrane are investigated.Results indicate that ZrO2 mineralized layer is evenly supported on the surface of the membrane and the inner wall of pores of the membrane.The mineralized layer gradually thickens with the prolonging mineralization time.Inorganic ZrO2 mineralization layer can significantly increase the structural rigidity of PVDF membrane,therefore improving its anti-pressure density and suppressing its flux attenuation.In comparison to pure PVDF membrane,the tensile strength and hardness of the PVDF/ZrO2 mineralized membrane that has been mineralized for 60 min increase by 76% and 79%,respectively,while the flux attenuation rate generated due to mechanical compaction during operation decreases from 53% to 32%.On the other hand,ZrO2 mineralized layer has also elevated the water permeability of PVDF membrane.The pure water flux and BSA rejection of PVDF/ZrO2 mineralized membrane reach 165.2 L·m-2·h and 91.4%,respectively.
徐积斌, 康雪婷, 陈丙晨, 白云翔, 董亮亮, 张春芳. 聚偏氟乙烯超滤膜仿生矿化增强及其抗压密性能的研究[J]. 现代化工, 2020, 40(9): 75-79.
XU Ji-bin, KANG Xue-ting, CHEN Bing-chen, BAI Yun-xiang, DONG Liang-liang, ZHANG Chun-fang. Enhancing mechanical strength of polyvinylindene fluoride ultrafiltration membrane via biomimetic mineralization and study on its anti-compression properties. Modern Chemical Industry, 2020, 40(9): 75-79.
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