H-PSMA/PVA/PP复合膜的制备及油-水乳液分离性能

通过两步法对聚丙烯（PP）膜进行了亲水改性:首先，通过在碱性条件下水解苯乙烯-马来酸酐共聚物（PSMA）制备了水解的苯乙烯-马来酸酐共聚物（H-PSMA）；然后，以聚乙烯醇（PVA）为亲水性改性剂，戊二醛（GA）为交联剂，将H-PSMA/PVA/GA复合材料浸涂在PP基底膜上，制备了亲水性水解苯乙烯-马来酸酐共聚物/聚乙烯醇/聚丙烯（H-PSMA/PVA/PP）复合膜。利用傅里叶变换红外光谱（FT-IR）分析表征了H-PSMA和H-PSMA/PVA/GA的结构；通过测试复合膜表面的静态接触角，探究了PVA和GA含量及成膜溶液的质量浓度等对膜表面润湿性能的影响；最后，测试了复合膜的油水分离效率和重复利用率。结果表明:当GA、PVA和H-PSMA的质量比为0.225∶1∶1，成膜溶液的质量浓度为0.03 g/mL时，所制备的H-PSMA/PVA/PP复合物膜对水包油乳液（O/W）表现出优异的分离性能，初次油水分离效率为99.40%，当重复分离10次后，油水乳液的分离效率仍达到98.83%以上。该复合膜的制备工艺具有安全性好、成本低和环境友好的特点。

Preparation of H-PSMA/PVA/PP Composite Membrane and Its Separation Performance for Oil-Water Emulsion

Polypropylene （PP） membrane was hydrophilically modified via two steps. Firstly，the hydrolyzed poly（styrene-co-maleic anhydride） （H-PSMA） was prepared by hydrolysis reaction of poly（styrene-co-maleic anhydride） （PSMA） in an alkaline environment. Secondly the hydrophilichydrolyzed poly（styrene-co-maleic anhydride）/polyvinyl alcohol/polypropylene （H-PSMA/PVA/PP） composite membranes were prepared by coating PP base membrane with H-PSMA/PVA/GA composite，in which PVA was used as hydrophilic modifier and glutaraldehyde （GA） as crosslinking agent. The chemical structures of H-PSMA and H-PSMA/PVA/GA were characterized using Fourier transform infrared spectroscopy analysis. The influences of the contents of PVA，GA and the mass concentration of membrane-forming solution on the wettability of the composite membranes were tested by surface static contact angle. The oil-water separation efficiency and the recycling rate of the composite membranes were also investigated. The results show that the as-prepared composite membrane exhibits excellent separation efficiency for oil-in-water（O/W）emulsion. The separation efficiency of the composite membrane is 99.40% initially and above 98.83% after 10 cycles when the mass ratio of GA，PVA and H-PSMA is 0.225∶1∶1 and the mass concentration of the membrane-forming solution is 0.03 g/mL. The preparation process of the composite membrane has the advantages of low cost，safety and environmental friendliness.