Nondestructive Strategy to Effectively Enhance the Interfacial Adhesion of PBO/Epoxy Composites
Nondestructive Strategy to Effectively Enhance the Interfacial Adhesion of PBO/Epoxy Composites
复制标题
有效增强 PBO/环氧树脂复合材料界面附着力的无损策略
DOI：
10.1021/acsami.0c14975
复制
发表时间：
2020-10-07
影响因子：
9.5
通讯作者：
Zhang, Bo
中科院分区：
文献类型：
--
作者：
Wu, Shaohua;Li, Chuncheng;Zhang, Bo
Low interfacial adhesion seriously limits the wide application of PBO fiber in composites. To solve this problem, a novel hierarchical reinforcement strategy was developed by introducing epoxy sizing, nanoreinforcement of amino-functionalized silicon dioxide (SiO2-NH2), and an interfacial compatibilizer of 2,6-bis(2-hydroxy-4-aminophenyl) benzobisoxazole (HABO) onto poly(p-phenylene benzobisoxazole) (PBO) fibers via a facile dip-coating approach. SiO2-NH2 and HABO were uniformly dispersed in epoxy sizing, forming an active interface layer. On this basis, wettability, surface roughness of the PBO fiber, and compatibility with the resin matrix were significantly improved, which gave 88.4 and 40.4% enhancement in the interfacial shear strength and interlaminar shear strength of the corresponding composites, respectively. Moreover, it should be noted that the outstanding mechanical and thermal properties of the PBO fiber were not impaired during the sizing treatment. In summary, our work provides an effective and damage-free approach to improve the interfacial adhesion of PBO/epoxy composites.
