【摘要】 分析了环氧胶粘剂纳米改性机理,用AJ-Ⅲa型原子力显微镜(AFM)研究经纳米SiO2、TiO2和SiC粒子改性后环氧胶粘剂截面图形及组团结构,测试及分析了环氧胶粘剂的耐温性能和抗拉、剪切强度。结果表明,SiO2、TiO2和SiC混合掺入质量分数为4%时,玻璃化温度提高了43℃,抗拉强度提高了17.7%,剪切强度提高了28.6%。用改性后的胶粘剂封装的光纤光栅(FBG)传感器,经实验室和现场测试,可以用于40MPa、300℃的工况环境。更多还原

【Abstract】 The mechanism of property modification with nanometric particles for epoxy adhesive agent has been analysed,the cross-sectional view and agglomerative structure of epoxy adhesive agent after property modification with nanometric SiO2,TiO2,and SiC particles are studied by using AJ-Ⅲa type atomic forced microscope(AFM),and the temperature-resistant performance,the tensile and shearing strength of epoxy adhesive agent after the property modification are tested and analysed.Results show that the glass-transition temperature has been enhanced by 43 ℃,the tensile strength is increased 17.7%,and the shearing strength is heightened 28.6% when the mass fraction concerning mixedly blended SiO2,TiO2,and SiC particles is 4%.Through the tests in the laboratory and in the field,it is shown that the fiber Bragg grating(FBG) sensors coated with epoxy adhesive agent after above-mentioned property modification can be used under environmental conditions of 40 MPa and 300 ℃.更多还原