为了提高BaTiO3/PVDF复合材料的击穿场强.首先,利用多巴胺对BaTiO3进行表面功能化处理,得到多巴胺改性的BaTiO3(Dopa@BaTiO3);然后,将其与聚偏氟乙烯(PVDF)混合,采用液相浇铸法制得Dopa@BaTiO3/PVDF复合材料;最后,测量了不同Dopa@BaTiO3添加量的Dopa@BaTiO3/PVDF复合材料的击穿场强和介电性能.结果表明:与改性前的BaTiO3/PVDF复合材料相比,Dopa@BaTiO3/PVDF复合材料在击穿场强显著提高的同时,介电常数基本保持不变;当Dopa@BaTiO3添加量为3vol%时,击穿场强为210 kV/mm,比改性前的复合材料的提高了78%;当Dopa@BaTiO3添加量为10vol%时,击穿场强为180 kV/mm,比改性前的合材料的提高了88%.研究解决了BaTiO3/PVDF复合材料击穿场强较低的问题,可为同时提高复合材料的介电常数和击穿场强提供参考.
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