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Effect of polyethylene oxide concentration on structures and properties of PVDF membranes

Authors： WU Chunfeng, LV Xiaolong*, WU Chunrui, GAO Qijun, WANG Xuan, CHEN Huayan, JIA Yue

Units： State Key Laboratory of Separation Membranes and Membrane Process, Institute of Biological and Chemical Engineering ,Tianjin Polytechnic University, Tianjin 300387, China

KeyWords： Polyvinylidene fluoride；Plasmapheresis；Polyethylene oxide；Microporousmembrane

ClassificationCode：TQ028.8;R318.08

year,volume(issue):pagination： 2016,36(5):40-46

Abstract：

Hydrophilicsmall molecular weight additive is easily lost in the membranes, and the pore size of the membranes is not big enough. Poly (vinylidene fluoride) (PVDF) hollow fiber plasmapheresis membranes were fabricated by dry/wet phase inversion with adding the hydrophilic macromolecular polyethylene oxide (PEO) and small molecular polyethylene glycol (PEG400). It studied different compound ratio of the PEO and PEG400 on structure and performance of PVDF membrane. The results showed that it could increase the separate aperture with the increase of the PEO content. The separate aperture increased from 0.245μm to 0.602μm.And membrane water flux had a decreasing trend after increasing first. And the highest water flux could reach 1117 L•m-2•h-1. Also mechanical properties changed little. The attenuated total reflectance Fourier transform infrared spectra(ATR-FTIR) analysis and elution experiments confirmed that the PEO macromolecular additives remained within the PVDF modified membrane, which can effectively improve hydrophilicity of the membrane.

Funds：

天津市科技支撑项目“PVDF中空纤维细胞过滤器的研制与开发”（15ZCZDGX00280）

AuthorIntro：

第一作者简介：吴春凤（1989-），女，山东菏泽人，在读硕士，师承吕晓龙教授，从事膜材料在生物医学领域的应用。*通讯作者：吕晓龙,E-mail:luxiaolong@263.net

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