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聚四氟乙烯微孔膜亲水性与抗污性的关系研究

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发表于 2012-12-11 20:57:49 | 显示全部楼层 |阅读模式
聚四氟乙烯微孔膜亲水性与抗污性的关系研究
Relationship between the Hydrophilicity and Antifouling Performance  of Polytetrafluoroethylene (PTFE) Microporous Membrane
作  者:王峰 朱海霖 郭玉海

WANG Feng, ZHU Hai-lin, GUO Yu-hai (The Key Laboratory of Advanced Textile Materials and Manufacturing Technology (Zhejiang Sic-Tech University), Ministry of Education, Hangzhou 310018, China)

机构地区:浙江理工大学先进纺织材料与制备技术教育部重点实验室,杭州310018

出  处:《浙江理工大学学报》 2012年第29卷第5期 641-645页,共5页

Journal of Zhejiang Sci-tech University

基  金:教育部新世纪优秀人才支持计划(NCET-10-0980)

摘  要:探讨错流过滤中聚四氟乙烯微孔膜亲水性与抗污性的关系。在聚四氟乙烯(PTFE)膜表面引入磺酸基(-SO3H),通过扫描电镜(SEM)、傅里叶红外光谱(FTIR)、固体表面电位分析仪(SurPASS)等研究-SO3H含量对膜亲水性、Zeta电位、牛血清蛋白(BSA)静态吸附量及水通量的影响。结果表明:疏水的PTFE膜易吸附负离子,Zeta电位〈0,BSA吸附量高,水通量降幅大,抗污性差;经过亲水改性后,由于-SO3H的引入,膜表面不易吸附负离子,Zeta电位升高,BSA吸附量降低,水通量降幅小;随-SO3H含量增加,膜Zeta电位因-SO3H电离而降低,与负电性BSA之间的静电斥力增强,抗污性进一步提高。

The relationship between the hydrohilicity and antifouling performance of polytetrafluoroethylene (PTFE) microporous membrane in cross-flow filtration is determined. The effects of the sulfonic group (-SO3H) on the water contact angle, Zeta potential, static absorption of bovine serum albumin (BSA), and water flux were studied by scanning electron microscopy, Fourier-transform infrared spectros-copy, and surface potential analysis of solid surface after introducing -SO3 H onto the surface of a PTFE membrane. The Zeta potential is negative, owing to the absorption of electronegative ion onto the hydro-phobic PTFE membrane. The PTFE membrane shows abundant static absorption of BSA and obviously decreased water flux, which demonstrates a weak antifouling property. However, the PTFE/P(AA-co-NaSS) composite membrane shows excellent antifouling performance because the introduction of -SO3 H makes the absorption of electronegative ions and BSA difficult. The electrostatic repulsion between the membrane and BSA is enhanced because the Zeta potential becomes more negative with increased -SO3 from the ionization of -SO3 H, which improves the antifouling performance.

关 键 词:聚四氟乙烯 薄膜 抗污性 Zeta电位 静电斥力
polytetrafluoroethylene membrane membrane fouling Zeta potential electrostatic repulsion
分 类 号: TQ028.8 [工业技术 > 化学工业 > 一般性问题 > 化工过程(物理过程及物理化学过程) > 分离过程]

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聚四氟乙烯微孔膜亲水性与抗污性的关系研究

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