环氧树脂基化学材料改性工艺与介电性能研究

摘要

针对以环氧树脂为基体的陶瓷/金属/聚合物复合材料介电性能不高的现状,采用对填充的BaTiO3(BT)陶瓷进行酒石酸化学表面改性,以提高BT与环氧树脂基体的界面连接.探讨了表面改性技术对化学复合材料的介电性能作用机理,进一步研究了导电填料Ni对BT陶瓷/环氧树脂化学复合材料介电性能的影响.结果表明:BT的表面改性有利于BT和金属Ni颗粒在环氧树脂基体中的分散,提高了化学材料的介电性能,与未改性BT/Ni/环氧树脂复合材料相比,经酒石酸改性后的三相化学材料的介电常数高达55.13,较改性前提高了31.54%.%For the low dielectric property of ceramic/metal/polymer composites with epoxy resin matrix,the surface of the filled BaTiO3 is modified by using tartaric acid in order to improve the interface interaction between BaTiO3 and epoxy resin matrix.The acting mechanism of the surface modification upon the dielectric properties of the chemical composite is discussed.And a further research is conducted on the effect of Ni on the dielectric properties of epoxy resin composites.Results show that the surface modification of BT improves the dispersion of the particles of BaTiO3 and Ni in epoxy resin matrix and enhances the dielectric property of chemical composites.Compared with the unmodified BT/Ni epoxy resin composite materials,the dielectric constant of three-phrase chemical materials modified by tartaric acid reaches as high as 55.13,increasing by 31.54% than the pre-modification.