膜科学与技术

聚四氟乙烯平板膜的亲水改性研究

作者：朱海霖¹，²张华鹏¹，郭玉海¹，²李玖明¹陈建勇¹，²

单位： 1浙江省丝纤维材料和加工技术重点实验室，浙江理工大学，杭州 310018

关键词：聚四氟乙烯平板膜；聚苯乙烯磺酸钠；聚乙烯醇；亲水性

出版年,卷(期):页码： 2015,35(3):1-5

摘要：

本文提出一种亲水材料为“藤”、聚四氟乙烯（PTFE）平板膜中的原纤为“树”的“藤缠树”物理亲水改性方法。采用聚苯乙烯磺酸钠（PSS）为亲水剂，亲水性聚乙烯醇（PVA）为粘合剂，戊二醛（GA）为交联剂，对PTFE平板膜进行亲水改性，考察了亲水改性对平板膜结构和性能的影响。研究表明，扫描电镜（SEM）显示出PTFE膜中的原纤变粗，亲水材料包覆在原纤上；随着PVA和PSS浓度的增加，膜孔径、孔隙率和表面接触角均减小，纯水通量先增加后减小；改性PTFE平板膜的亲水持久性较好，对水晶碾磨废水的浊度去除率达99.84%，亲水改性有效抑制了蛋白质的吸附污染。

A physical hydrophilic modification method was investigated in this study.It took hydrophilic material as vine and the fibril in the polytetrafluoroethylene (PTFE) flat sheet membrane as tree.The PTFE flat sheet membrane was hydrophilic modifiedby using polystyrene sulfonate (PSS) as a hydrophilic agent, polyvinyl alcohol (PVA) as an adhesive and glutaraldehyde (GA) as a crosslinking agent. The effect of hydrophilic modification on the structure and property of the PTFE flat sheet membrane was investigated. SEM images showed that the fibrilsin the microstructure of the modified PTFE membrane became thick and the fibrils were encapsulatedin the hydrophilic material. With the increase of concentration of PVA and PSS, pore size, porosity and surface contact angle of the modified membrane decreased, the pure water flux firstlyincreased and then reduced.The hydrophilic persistence of the modified PTFE flat sheet membrane is good, the rejection of turbidity of crystal grinding wastewater was 99.84%, and the modification effectively inhibited the pollution of protein adsorption.

胡超，1989-，女，浙江绍兴人，硕士研究生，主要研究方向为PTFE膜材料的制备及应用，E-mail: 417540141@qq.com

参考文献：

[1] Eui-Jong Lee, Kwan-Yeop Kim, Yong-Soo Lee, et al. A study on the high-flux MBR system using PTFE flat sheet membranes with chemical backwashing[J].Desalination, 2012(306):35-40.
[2] Cheng Bi, Huamin Zhang, Yu Zhang, et al. Hydrophilic treatment poly(tetrafluoroethylene) reinforced sulfonated poly(ether ether ketone) composite membrane for proton exchange membrane fuel cell application [J]. Journal of Power Sources,2009,194: 838-842.
[3] Chen-Yuan Tu, Yi-Chieh Wang, Chi-Lan Li, et al. Expanded poly(tetrafluoroethylene) membrane surface modification using acetylene/nitrogen plasma treatment[J]. 2005(41): 2343-2353.
[4] 卢婷利, 梁国正, 杨洁颖, 等. 聚四氟乙烯膜辐射接枝反应条件的研究[J]. 辐射研究与辐射工艺学报. 2003,21(4): 251-255.
[5] S.W. Lee, J.W. Hong, M.Y. Wye, et al. Surface modification and adhesion improvement of PTFE film by ion beam irradiation[J]. Nuclear Instruments and Methods in Physical Research Section B,2004(219-220): 963-967.
[6] Yan Chen, Ziqiang Zhao, Yingmin Liu. Wettability characteristic of PTFE and glass surface irradiated by keV ions[J]. Applied Surface Science, 2008(254): 5497-5500.
[7] LIU Zhen-mei, XU Zhi-Kang, WANG Jian-qin, et al. Surface modification of microporous polypropylene membranes by the grafting of poly(c-stearyl-L-glutamate)[J]. European Polymer Journal, 2003, 39(12): 2291-2299.

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