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作为一种新型改性方法,电晕诱导接枝进行聚合物微孔膜表面改性具有设备简单、可连续运行、不破坏膜本体结构、操作条件温和、辐照强度均匀以及产物纯净等优点。本研究中,使用电晕处理设备对自制PVDF平板膜表面进行了电晕放电处理,电压为8~12kV,处理时间为20~100s。然后将其浸入丙烯酸溶液中进行接枝聚合反应,单体浓度为15vt%,反应温度为50℃,反应时间为5小时。研究该方法可行,并且接枝效果和电晕电压、电晕时间、接枝时间和单体浓度成正比。
As a new modification method, corona induced grafting on the surface of polymer microporous membrane has the advantages of simple equipment, continuous operation, no damage to membrane bulk structure, mild operating conditions, uniform irradiation intensity and pure product. In this study, the surface of self-made PVDF flat-plate membrane was treated by corona treatment with corona treatment equipment at a voltage of 8 ~ 12kV and a treatment time of 20 ~ 100s. Then it was immersed in acrylic acid solution for graft polymerization, the monomer concentration of 15vt%, the reaction temperature was 50 ℃, the reaction time was 5 hours. It is feasible to study this method, and the grafting effect is proportional to corona voltage, corona time, grafting time and monomer concentration.