聚丙烯微孔膜高能电子束辐照改性及其性能研究

采用高能电子束辐照的方法在聚丙烯微孔膜的表面接枝丙烯酸锂,研究不同的辐照剂量对聚丙烯微孔膜表面接枝丙烯酸锂的接枝率的影响,并对辐照接枝后的聚丙烯微孔膜的结构和性能进行了研究。红外光谱测试结果表明:通过高能电子束辐照,聚丙烯微孔膜的表面能够成功地接枝上丙烯酸锂;表面水接触角测试结果表明,经辐照接枝丙烯酸锂后,聚丙烯微孔膜的表面水接触角减小,表面极性增加,表面亲水性得到提高;SEM观察结果表明,辐照后聚丙烯微孔膜的孔径减小;DSC测试结果表明:辐照后聚丙烯微孔膜的结晶峰温度向高温方向移动,结晶能力得到提高,结晶更加完善。

Study on the Property of PP Microporous Membrane Modified by High Energy Electron Beam Irradiation

PP microporous membrane was grafted with acrylic lithium under high energy electron beam irradiation. The effect of irradiation dosages on the grafting yield of PP microporous membrane was studied. The structure and properties of PP microporous membrane after high energy electron beam irradiation was explored. The results of FTIR illustrated that the PP microporous membrane was grated with acrylic lithium successfully under high energy electron beam irradiation. Moreover, after high energy electron beam irradiation, the water contact angle of PP microporous membrane reduced, the surface nonpolarization and surface hydrophilic property were improved. The SEM observation indicated that the aperture of PP microporous membrane was reduced. The DSC test results showed that the crystallization peak temperature of modified PP microporous membrane was moved toward the high temperature direction, the crystallization ability was enhanced and the crystals became more perfect.