【摘要】 为研究经蒸汽爆破处理过的剑麻纤维(SF)对酚醛/SF/玻璃纤维(GF)共混复合材料的界面作用及力学性能的影响,对蒸汽爆破处理过的SF、GF和酚醛树脂(PF)进行辊炼、模压成型,制得PF/SF/GF复合材料.采用静态、动态力学分析研究了SF含量对复合材料力学性能的影响,通过扫描电子显微镜(SEM)观察了材料冲击断面的形态.结果表明,SF的加入对PF/SF/GF复合材料的性能有较大提高,与未加入SF相比,当m(SF)∶m(GF)=1∶1时,复合材料的冲击强度提高了25%,耐磨性能提高了66%,损耗峰向高温方向移动了约12℃.冲击断面的SEM分析说明复合材料的界面粘结作用有了明显的改善.更多还原

【Abstract】 The PF/SF/GF hybrid composites are prepared with steam explosion-modified sisal fiber(SF),glass fiber(GF) and phenol formaldehyde(PF) by blending and compression molding.The effects of SF on the mechanical properties are tested by static and dynamic mechanical analysis(DMA).The morphological structure is characterized by the scanning electron microscopy(SEM).The results show that the addition of SF improves the properties of the hybrid composites obviously.When the mass ratio of SF and GF is 1,the impact strength and wear resistance of PF/SF/GF hybrid composites are improved by 25% and 66%,compared with those of PF/SF/GF composites.The loss peak temperature increases to 12 ℃,higher than that of PF/SF/GF composites.SEM observation of the impact fracture surface shows that the interfacial adhesion between the matrix and reinforcing phase is improved obviously by steam explosion modification of SF.更多还原