二次刮膜法制备处理石化污水聚偏氟乙烯复合膜

发布时间：2018-02-06 07:06

本文关键词： 聚偏氟乙烯平板复合膜二次刮膜亲水性增强型　出处：《现代化工》2017年07期 　论文类型：期刊论文

【摘要】：研究了一次刮膜形成偶联层的涂覆液组成与刮膜厚度以及二次刮膜铸膜液的配方与成膜工艺,利用扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)等对制备的膜组成及结构进行了表征。首先通过聚合物共混相容性实验筛选出聚甲基丙烯酸甲酯(PMMA)作为支撑层聚酯无纺布与聚偏氟乙烯(PVDF)铸膜液之间的偶联层聚合物,确定一次刮膜涂覆液中PMMA的质量分数为12%,刮膜厚度为20μm;然后优化确定了二次刮膜铸膜液配方NMP/PVDF/PMMA/PVP质量比为74/16/4/6。经二次刮膜法制备的聚偏氟乙烯平板复合超滤膜机械强度高,抗反洗能力强,主体材料为PVDF,在0.1 MPa条件下纯水通量稳定在628.1 L/(h·m~2),接触角为53.7°,用于实际石化废水处理运行1个月膜平均产水通量约为68.3 L/(h·m~2),产水浊度基本稳定在0.2~0.6 NTU之间,膜表面污染物较少,抗污染能力强。
[Abstract]:The composition and thickness of the coating and the formulation and process of the casting solution of the second scraping film were studied. The SEM was used to study the composition and thickness of the coating solution for forming the coupling layer by the scanning electron microscope (SEM). The composition and structure of the films were characterized by X-ray photoelectron spectroscopy (XPS). It acts as a coupling layer polymer between polyester nonwoven fabric and PVDF casting solution. The mass fraction of PMMA and the thickness of scrape film were determined to be 12 渭 m and 20 渭 m, respectively. Then, the mass ratio of NMP/PVDF/PMMA/PVP was determined to be 74 / 16 / 4 / 6. The polyvinylidene fluoride plate composite ultrafiltration membrane machine was prepared by secondary scraping method. High intensity. The main material is PVDF. The pure water flux is stable at 628.1 L / h 路m ~ (2 +) at 0. 1 MPa, and the contact angle is 53.7 掳. The average water flux of the membrane used in petrochemical wastewater treatment for one month is about 68.3 L / h 路m ~ (2 +), and the turbidity of the produced water is basically stable at 0.22 ~ 0. 6 NTU. The membrane surface has less contaminants and strong anti-fouling ability.
【作者单位】：中国石化北京化工研究院;
【基金】：中国石油化工股份有限公司开发项目(312071) 山东省自然科学基金资助项目(ZR2010BM037)
【分类号】：TQ051.893;X742

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