摘要
在原位法制备纳米复合材料时,要使纳米粒子在树脂中分散均匀,必须首先获得稳定的单体悬浮体系[1] 。基于这一原理,本文通过对纳米Al2 O3 表面改性即选择合适的分散剂,获得稳定的纳米Al2 O3 /丙酮悬浮液,然后将环氧树脂溶解于其中,制得纳米Al2 O3 /环氧树脂复合材料。运用透射电子显微镜,观察了纳米Al2 O3 在环氧基体中的分散情况。分析并讨论了纳米Al2 O3 含量对该复合材料力学性能的影响。结果表明:利用稳定的悬浮体系能制得分散较为均匀的纳米复合材料,在纳米Al2 O3 含量为5 %的情况下,纳米复合材料的力学性能达到最优。
It is known that, while preparing nanocomposites by in - situ method, a steady monomer suspension system must be obtained to make the nanoparticles disperse uniformly in the system. Based on this principle, the steady nano- Al2O3/acetone suspension was obtained by the surface modification of nano- A12O3 with suitable dispersant. Then the nano- Al2O3/epoxy composite was prepared by means of solving epoxy resin in the suspension. The dispersion of Al2O3 particles in the resin was observed with the aid of TEM. Moreover, the influence of nano - particles content on the mechanical and the thermal properties was discussed in the paper. The results indicate that a steady suspension system can he used to prepare well - dispersed nanocomposites. Nanocomposites with content of 5 % nanometer Al2O3 show the best mechanical properties.
出处
《纤维复合材料》
CAS
2005年第1期3-6,共4页
Fiber Composites