CAJ | 학술논문

利用硅烷偶联剂对纳米 SiO2进行表面改性,进而通过共混法将改性后的纳米SiO2粒子分散到环氧树脂(Epoxy)中,制备了不同纳米 SiO2含量的 SiO2/EP 复合材料.利用 IR,SEM 和 TGA、阻抗分析仪等研究了 SiO2添加量对复合材料微观结构、热稳定性和介电性能的影响.结果表明,随着纳米 SiO2含量的增加,SiO2/EP 复合材料的热稳定性逐渐升高,介电常数和损耗因数则呈先降低后增加趋势；当纳米 SiO2含量为4%时,纳米颗粒在复合材料中分散均匀,复合材料的热稳定性好,介电性能最优(当测试频率为1 GHz,介电常数为2.86,介电损耗为0.02353).分析了复合材料热稳定和介电性能变化的微观机理.
이용규완우련제대납미 SiO2진행표면개성,진이통과공혼법장개성후적납미SiO2입자분산도배양수지(Epoxy)중,제비료불동납미 SiO2함량적 SiO2/EP 복합재료.이용 IR,SEM 화 TGA、조항분석의등연구료 SiO2첨가량대복합재료미관결구、열은정성화개전성능적영향.결과표명,수착납미 SiO2함량적증가,SiO2/EP 복합재료적열은정성축점승고,개전상수화손모인수칙정선강저후증가추세；당납미 SiO2함량위4%시,납미과립재복합재료중분산균균,복합재료적열은정성호,개전성능최우(당측시빈솔위1 GHz,개전상수위2.86,개전손모위0.02353).분석료복합재료열은정화개전성능변화적미관궤리.
The blending method was used to prepare nano-SiO2/epoxy composites,where nano-SiO2 was premodified using silane coupling agent.The influences of nano-SiO2 content on the microstructure, thermal stability and dielectric properties of SiO2/EP composites were studied by using IR,SEM,TGA, impedance analyzer et al.The microscopic mechanism of thermal stability and dielectric property evolutions of the SiO2/EP composites were also discussed.with the increase of nano-SiO2 content,the thermal stabil-ity of SiO2/EP composites gradually increased,while the dielectric constant and dielectric loss factor of the composites decreased first and then increased.When the content of nano-SiO2 equaled 4%,the nanoparti-cles exhibited a uniform dispersion in composite,its dielectric constant was 2.86,and its corresponding di-electric loss was 0.023 53.