轻质环氧玻纤复合材料的制备及性能研究

Study on preparation and performance of lightweight epoxy glass fiber composites

通过在环氧树脂中引入空心玻璃微球,并复合玻璃纤维布,制备轻薄、高强复合材料;使用密度天平、扫描电镜、万能拉力机和网络分析仪等对材料密度、截面形态、力学性能、介电性能进行分析。结果表明:随空心玻璃微球占比增加,复合材料密度逐渐降低,当m(空心玻璃微球):m(环氧树脂)为0.4时,复合材料密度为0.98g/cm^(3);当m(空心玻璃微球):m(环氧树脂)大于0.4后,复合材料空隙率明显增大,且吸水率开始明显上升;随空心玻璃微球占比增加,复合材料弯曲、拉伸性能逐渐下降,当m(空心玻璃微球):m(环氧树脂)为0.8时,弯曲强度下降65.1%,拉伸强度下降64.4%;空心玻璃微球可以很好地降低复合材料介电常数。

By introducing hollow glass microspheres into epoxy resin,and compositing with glass fiber cloth,the lightweight,thinning and high-strength composites were prepared.The density,cross section morphology,mechanical performance and dielectric performance of the materials were analyzed using density balance,scanning electron microscope,universal tensile strength machine and network analyzer,etc.The results showed that with the increase of the ratio of hollow glass microspheres,the density of the composites gradually decreased,and when m(hollow glass microspheres):m(epoxy resin)was 0.4,the density of the composites was 0.98g/cm^(3);when m(hollow glass microspheres):m(epoxy resin)was greater than 0.4,the porosity of the composites increased significantly,and the water absorption rate began to increase significantly;with the increase of the ratio of hollow glass microspheres,the bending and tensile performance of the composites gradually decreased,and when m(hollow glass microspheres):m(epoxy resin)was 0.8,the bending strength decreased by 65.1%,and the tensile strength decreased by 64.4%;the hollow glass microspheres could effectively reduce the dielectric constant of the composites.