摘要
为了提高环氧复合泡沫塑料(ESF)的性能,扩大应用范围,采用超声波和高剪切分散工艺制备了纳米SiO2改性ESF。结果表明:纳米SiO2的添加量质量分数为3%时,改性效果最好,其拉伸强度、弯曲强度和不加纳米粒子的ESF相比,分别提高了41%、19%;采用扫描电镜(SEM)对材料的断口形貌进行了观察,从微观结构上研究了纳米SiO2的加入对ESF性能的影响;对材料的介电性能测试表明,纳米SiO2粒子的加入对ESF的高频介电性能影响不显著;动态力学分析(DMA)研究表明纳米SiO2粒子质量分数为1%时,ESF的Tg提高了4℃。
In order to improve the properties and extend the limits of application of ESF （epoxy syntactic foam）, ESF filled with nano-SiO2 is prepared by the process of ultrasonic-wave and supershear dispersion. The resuits indicate that 3% nano-SiO2 content can achieve the best overall properties. Tensile strength and bend strength of ESF are improved by 41% and 19%. （SEM）. Electrical property is not changed nano-SiO2 content is 1%. The fracture surfaces are examined by scanning electron microscopy remarkably. DMA analysis reveals that the Ts is increased by 4℃ while nano-SiO2 content is 1%.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2006年第3期26-28,共3页
Aerospace Materials & Technology
