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首页|期刊导航|高等学校化学学报|聚氯乙烯-聚乙烯醇的相容性及其复合多孔膜的结构与性能

聚氯乙烯-聚乙烯醇的相容性及其复合多孔膜的结构与性能OA北大核心CSTPCD

Compatibility of Polyvinyl Chloride-Polyvinyl Alcohol and Structure and Properties of Their Composite Porous Membranes

中文摘要英文摘要

通过溶液成膜法制备了聚氯乙烯-聚乙烯醇(PVC-PVA)复合多孔膜,从聚合物混合焓及分子之间相互作用的角度探讨了PVC和PVA两者之间的相容性,采用扫描电子显微镜(SEM)、接触角测量仪及平板超滤膜测试仪等分析了复合多孔膜的孔形貌、亲水性、过滤性能及力学性能.研究结果表明,在PVC-PVA复合体系中,大分子之间可形成氢键及偶极相互作用,混合焓随PVA在聚合物中质量分数的增大而呈现先增大后减小的趋势,PVC-PVA总体上为部分相容.与纯PVC膜相比,PVC-PVA复合多孔膜断面的"指状孔"特征减弱,而"海绵孔"特征增强,且纯水通量增大、耐污染性能改善、力学韧性增强.当PVA在聚合物中的质量分数为9%时,复合多孔膜的纯水通量是纯PVC膜的4倍,对PEG100000的截留率为80%,强度为3.5 MPa,断裂伸长率为26%,在水处理领域具有良好的应用前景.

Polyvinyl chloride-polyvinyl alcohol(PVC-PVA)composite porous membranes were prepared by solution filming,the compatibility of PVC-PVA was analyzed from the perspective of mixing enthalpy and inter-molecular interactions.The pore morphology,hydrophilicity,filtration performance and mechanical properties of the composite porous membranes were analyzed by scanning electron microscopy(SEM),contact angle measurement and plate ultrafiltration membrane test,etc.The research results show that hydrogen bonds and dipole interactions could be formed among macromolecules in PVC-PVA composite system,the mixing enthalpy show a trend of first increasing and then decreasing with the increase of the mass fraction of PVA in polymers,and PVC-PVA is generally partially compatible.Compared with pure PVC membrane,the"finger like pore"feature of the cross-section of PVC-PVA composite membrane became weaker,while the"sponge pore"feature became apparent,and the pure water flux of the composite prous membrane was increased,the pollution resistance was improved,and the mechanical toughness was enhanced.When the mass fraction of PVA in polymers was 9%,the pure water flux of the composite membrane was about 4 times that of pure PVC membrane,the retention rate of PEG100000 was 80%,the strength was 3.5 MPa,and the elongation at break was 26%,the composite has a good application prospect in the field of water treatment.

朱军;郭岳;伍洋

宜宾学院新材料产业技术研究院,宜宾 644000

化学

聚氯乙烯聚乙烯醇相容性复合多孔膜

Polyvinyl chloridePolyvinyl alcoholCompatibilityComposite porous membrane

《高等学校化学学报》 2024 (004)

19-26 / 8

宜宾学院科研启动项目(批准号:2019QD01)资助. Supported by the Scientific Research Initiation Project of Yibin University,China(No.2019QD01).

10.7503/cjcu20230479

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