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通过热处理方法得到表面不含羟基(—OH)的纳米MgO颗粒,采用母料法制备了10wt%纳米MgO/低密度聚乙烯(LDPE)复合材料,研究了纳米MgO/LDPE复合材料在70kV/mm直流电场下的空间电荷特性,评估了该方法对纳米颗粒分散的效果及工业化应用推广价值。结果表明:表面羟基化对纳米MgO/LDPE复合材料变温体积电阻率及介电特性的影响不大,空间电荷积累量增加。当纳米MgO掺杂量为1wt%时,复合材料的电性能最佳。
The nano-MgO particles with no hydroxyl groups (-OH) on the surface were obtained by heat treatment. 10wt% Nano-MgO / LDPE composites were prepared by the masterbatch method. DC electric field under the space charge characteristics, evaluate the effect of this method on the dispersion of nanoparticles and industrial application of the promotion value. The results show that surface hydroxylation has little effect on the volume resistivity and dielectric properties of nano-MgO / LDPE composites, and the space charge accumulation increases. When the nano-MgO doped amount of 1wt%, the electrical properties of the composite material the best.