采用非溶剂诱导相分离法制备了双层聚偏氟乙烯/聚氯乙烯(PVDF/PVC)超疏水复合膜。通过在质量分数12% PVDF/PVC(质量比85/15)铸膜液制备的单层膜上涂敷质量分数4% PVDF/PVC涂层,制备了双层PVDF/PVC超疏水复合膜。采用接触角测量仪、场发射扫描电子显微镜、原子力显微镜、X射线衍射仪对双层超疏水复合膜的接触角、表面微观形貌、表面粗糙度、晶态物相进行测试。结果表明:双层PVDF/PVC超疏水复合膜的表面被交联的微纳米微球覆盖,其接触角超过150°,达到超疏水状态;双层超疏水复合膜可承受最大拉力达到2.34N,具有良好的力学性能;同时,双层超疏水复合膜具有持久的自洁性能,自清洁实验重复3次后,其静态接触角仍然可以达到150°。
In this paper,a polyvinylidene fluoride/polyvinyl chloride (PVDF/PVC) superhydrophobic double-layer composite membrane was prepared using a nonsolvent-induced phase separation method.The double-layer PVDF/PVC superhydrophobic composite membrane was prepared by coating 4% PVDF/PVC on the monolayer membrane fabricated from a 12% PVDF/PVC casting solution with a PVDF/PVC mass ratio of 85/15.The contact angle,surface morphology,surface roughness and crystalline phase of the double-layer superhydrophobic composite membrane were tested by contact angle meter,field emission scanning electron microscope,atomic force microscope and X-ray diffractometer.The results showed that the surface of PVDF/PVC superhydrophobic double-layer composite membrane was covered by crosslinked micro nanospheres,and its contact angle exceeded 150°,achieving a superhydrophobic state.The double-layer superhydrophobic composite membrane could withstand a maximum tensile force of 2.34N,demonstrating good mechanical properties.Additionally,the double-layer superhydrophobic composite membrane exhibited durable self-cleaning performance,maintaining a static contact angle of 150° even after three repeated self-cleaning experiments.
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基金资助
国家自然科学基金资助项目(22168017);生物膜法水质净化及利用技术教育部工程研究中心开放基金资助项目(BWPU2022KF01);海南省自然科学基金创新研究团队项目(222CXTD513)
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