采用微乳化-热液法制备了一系列经自制偶联剂处理的纳米锆-铝复合氧化物分散液，采用原位聚合法制备了纳米锆-铝复合氧化物杂化聚酰亚胺复合薄膜，对纳米分散液及复合薄膜的掺杂层进行透射电镜测试，并对复合薄膜的高温耐电晕性能、电气强度、力学性能进行测试及分析。结果表明：分散液中纳米粒子的尺寸达到纳米级，纳米锆-铝复合氧化物杂化PI薄膜的耐电晕性能大幅提高；在固定无机物掺杂量为22%，Zr与Al的物质的量之比为1.2∶9时，PI薄膜的耐电晕寿命达到10.35 h，电气强度达到274.91 MV/m，拉伸强度为146.4 MPa，断裂伸长率为43.0%。
A series of nano Zr-Al composite oxide dispersions were preprared by microemulsion-hydrother-mal method and treated with homemade coupling agent, and then nano Zr-Al complex oxide hybrid poly-imide composite films were prepared via in-situ polymerization. The nano-dispersion and doped layer of the composite films were tested by TEM, and the corona resistance at high temperature, electric strength, and mechanical properties of the composite films were tested and analyzed. The results show that the size of nanoparticles in dispersion reaches nanometer, and the corona resistance of the nano Zr-Al com-posite oxide hybrid PI films is greatly improved. When the doping amount of inorganic compounds is 22% and the molar ratio between Zr and Al is 1.2∶9, the corona resistance life of the hybrid PI film reaches 10.35 h, the electric strength reaches 274.91 MV/m, the tensile strength is 146.4 MPa, and the elongation at break is 43.0%.
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