纳米SiO_2增强聚酰亚胺纤维纸基材料的研究

Improving the properties of polyimide fiber paper-based materials by nanosilica

以聚酰亚胺纤维和对位芳纶纤维为原料,考察了纳米SiO_2添加量对聚酰亚胺纤维纸页力学性能和电气性能的影响结果表明,当纳米SiO_2添加量为10%时,纸页的抗张指数和耐压强度最大,达到32.6N·m/g和8.45Kv/mm,与未添加纳米SiO_2的聚酰亚胺纤维纸基材料相比,抗张指数提高了27.14%,耐压强度提高了70.71%,此时,纸页的介电常数和介电损耗正切值达到最小,为1.02F/m和0.142 9;当纳米SiO_2添加量为20%时,纸页的撕裂指数最大,达23.9mN·m2/g.

Polyimide fiber paper was made of polyimide fiber and para-aramid fiber as raw ma-terial, the influence on mechanical and electrical properties of paper by the content of nanosil-ica was analyzed. The results showed that the tensile index and dielectric strength of the pa-per were the best,which were 32. 6 N· m/g and 8. 45 Kv/mm when the dosage of nanosilica was 10%,its tensile index increased by 27. 14% and dielectric strength increased by 70.71% compared with the polyimide fiber paper without nanosilica,while the dielectric constant and dielectric loss were minimum, which were 1. 02 F/m and 0. 142 9. The tearing index was the best when the dosage of nanosilica was 20% ,it was 23. 9 mN ·m2/g