CAJ | 학술논문

为了提高环氧树脂的热性能,将熔点高、导热耐热性好的ZrB2粉体作为增强体加入环氧树脂基体中,通过原位聚合制备了复合材料。为了改善ZrB2粉体在环氧树脂中的分散性,通过高能球磨法将纳米Al2 O3引入ZrB2中,形成ZrB2-Al2 O3复相陶瓷粉体,再用3-三乙氧基甲硅烷基-1-丙胺、3-缩水甘油醚氧基丙基三甲氧基硅烷和3-(三甲氧基甲硅烷基)丙基丙烯酸酯分别对ZrB2-Al2 O3复相陶瓷粉体表面进行有机功能改性。通过扫描电子显微镜( SEM)、傅里叶变换红外光谱( FTIR)和X射线光电子能谱( XPS)对表面改性ZrB2-Al2 O3复相陶瓷粉体进行表征；利用透射电子显微镜( TEM)、动态热机械分析( DMA)和热重分析( TGA)对复合材料的组织和热性能进行分析。结果表明,改性后ZrB2-Al2 O3复相陶瓷粉体品质优良,3种有机偶联剂均在ZrB2-Al2 O3复相陶瓷粉体表面形成化学键合；表面经有机偶联剂改性的ZrB2-Al2 O3复相陶瓷粉体在基体环氧树脂中具有较好的分散性,且3-缩水甘油醚氧基丙基三甲氧基硅烷的改性效果最佳。表面改性后ZrB2-Al2 O3复相陶瓷粉体较改性前复合材料呈现出更高的耐热性能。
위료제고배양수지적열성능,장용점고、도열내열성호적ZrB2분체작위증강체가입배양수지기체중,통과원위취합제비료복합재료。위료개선ZrB2분체재배양수지중적분산성,통과고능구마법장납미Al2 O3인입ZrB2중,형성ZrB2-Al2 O3복상도자분체,재용3-삼을양기갑규완기-1-병알、3-축수감유미양기병기삼갑양기규완화3-(삼갑양기갑규완기)병기병희산지분별대ZrB2-Al2 O3복상도자분체표면진행유궤공능개성。통과소묘전자현미경( SEM)、부리협변환홍외광보( FTIR)화X사선광전자능보( XPS)대표면개성ZrB2-Al2 O3복상도자분체진행표정；이용투사전자현미경( TEM)、동태열궤계분석( DMA)화열중분석( TGA)대복합재료적조직화열성능진행분석。결과표명,개성후ZrB2-Al2 O3복상도자분체품질우량,3충유궤우련제균재ZrB2-Al2 O3복상도자분체표면형성화학건합；표면경유궤우련제개성적ZrB2-Al2 O3복상도자분체재기체배양수지중구유교호적분산성,차3-축수감유미양기병기삼갑양기규완적개성효과최가。표면개성후ZrB2-Al2 O3복상도자분체교개성전복합재료정현출경고적내열성능。
In order to enhance the thermal properties of the epoxy resin, zirconium diboride( ZrB2 ) powders were chosen as reinforcement to add to the epoxy resin matrix to prepare composites by the in-situ polymeriza-tion due to its high melting point, good thermal conductivity and good heat resistance. The nano-alumina ( Al2 O3 ) was introduced in to form ZrB2-Al2 O3 multiphase ceramics through the high energy ball milling and by surface organic modification of nano-Al2 O3 to achieve improved dispersibility of ZrB2 particles in epoxy resin. The multiphase ceramic particles were modified by γ-aminopropyltriethoxysilane, γ-glycidoxypropyltri-methoxysilane andγ-methacryloxypropyltrimethoxysilane, respectively. The modified multiphase particles were characterized by scanning electron microscopy ( SEM ) , Fourier transform infrared spectroscopy ( FTIR ) and X-ray photoelectron spectroscopy( XPS) . The microstructure and thermal properties of composites filled with modified particles were analyzed using transmission electron microscopy ( TEM ) , dynamic thermomechanical analysis( DMA ) and thermo gravimetric analysis ( TGA ) . The results show that the quality of multiphase particles is good after modification. The three organic coupling agent molecules are all combined to the surfaces of multiphase particles by the covalent bonds. The multiphase particles modified with organic coupling agents disperse well in epoxy resin matrix and the effect of γ-glycidoxypropyltrimethoxysilane is the best. The Composites filled with modified particles present higher thermal properties compared to unmodified composites.