高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (9): 1846-1852.doi: 10.7503/cjcu20150145

• 高分子化学 • 上一篇    下一篇

纳米ZrB2复相陶瓷粉体表面有机功能改性及其对复合材料热性能的影响

何延楠, 于志强()   

  1. 复旦大学材料科学系, 上海 200433
  • 收稿日期:2015-02-11 出版日期:2015-09-10 发布日期:2015-08-21
  • 作者简介:联系人简介: 于志强, 男, 博士, 副教授, 主要从事复合材料研究. E-mail:yuzhiqiang@fudan.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 51273044)资助

Effect of Surface Organic Functional Modification of ZrB2 Nanosize Multiphase Ceramics on the Thermal Properties of Its Composites

HE Yannan, YU Zhiqiang*()   

  1. Department of Materials Science, Fudan University, Shanghai 200433, China
  • Received:2015-02-11 Online:2015-09-10 Published:2015-08-21
  • Contact: YU Zhiqiang E-mail:yuzhiqiang@fudan.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51273044)

摘要:

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Al2O3引入ZrB2中, 形成ZrB2-Al2O3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-Al2O3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-Al2O3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-Al2O3复相陶瓷粉体品质优良, 3种有机偶联剂均在ZrB2-Al2O3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-Al2O3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-Al2O3复相陶瓷粉体较改性前复合材料呈现出更高的耐热性能.

关键词: ZrB2-Al2O3复相陶瓷粉体, 表面有机改性, 环氧树脂, 热性能

Abstract:

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 polymerization due to its high melting point, good thermal conductivity and good heat resistance. The nano-alumina(Al2O3) was introduced in to form ZrB2-Al2O3 multiphase ceramics through the high energy ball milling and by surface organic modification of nano-Al2O3 to achieve improved dispersibility of ZrB2 particles in epoxy resin. The multiphase ceramic particles were modified by γ-aminopropyltriethoxysilane, γ-glycidoxypropyltri-methoxysilane and γ-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.

Key words: ZrB2-Al2O3 multiphase ceramics, Surface organic modification, Epoxy resin, Thermal property

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