碳纳米管和八氨基丙基多面体低聚倍半硅氧烷对碳纤维表面行为和复合材料力学性能的影响,Applied Surface Science

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碳纳米管和八氨基丙基多面体低聚倍半硅氧烷对碳纤维表面行为和复合材料力学性能的影响
Applied Surface Science ( IF 6.3 ) Pub Date : 2018-07-01 , DOI: 10.1016/j.apsusc.2018.03.219
Wenqi Shen , Ruina Ma , An Du , Xiaoyan Cao , Hebin Hu , Zhengbin Wu , Xue Zhao , Yongzhe Fan , Xiaoming Cao

摘要通过将CNTs和OA-POSS接枝到CFs表面，制备了一种碳纤维/碳纳米管/八-氨基丙基多面体低聚倍半硅氧烷（CF/CNTs/POSS）增强材料，以提高其力学性能和界面性能。应用扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS) 和接触角测试和分析来表征碳纤维表面。采用拉伸试验、弯曲试验和层间剪切强度（ILSS）试验来分析复合材料的力学性能。SEM和XPS的实验结果表明CNTs和OA-POSS均匀地接枝在纤维表面，CNTs中的NH和CFs表面上的POSS和COOH化学键合。接触角测试和分析结果表明，改性CFs的表面能与未改性的相比有所降低。此外，CNTs和OA-POSS涂层后复合材料的力学性能得到有效提高。特别是CF/1%CNTs/POSS制备的复合材料性能得到显着改善，因为OA-POSS增加了界面强度，CNTs增加了界面过渡层的厚度，两者都改善了复合材料的界面缺陷扩散。因此，CF/CNTs/POSS可以通过形成界面过渡层来提高复合材料的性能。CF/1%CNTs/POSS制备的复合材料性能得到显着改善，因为OA-POSS增加了界面强度，CNTs增加了界面过渡层的厚度，两者都改善了复合材料的界面缺陷扩散。因此，CF/CNTs/POSS可以通过形成界面过渡层来提高复合材料的性能。CF/1%CNTs/POSS制备的复合材料性能得到显着改善，因为OA-POSS增加了界面强度，CNTs增加了界面过渡层的厚度，两者都改善了复合材料的界面缺陷扩散。因此，CF/CNTs/POSS可以通过形成界面过渡层来提高复合材料的性能。

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Effect of carbon nanotubes and octa-aminopropyl polyhedral oligomeric silsesquioxaneon on the surface behaviors of carbon fibers and mechanical performance of composites

Abstract A kind of carbon fiber/carbon nanotubes/octa-aminopropyl polyhedral oligomeric silsesquioxane (CF/CNTs/POSS for short) reinforcement was prepared by grafting CNTs and OA-POSS to CFs surfaces in order to improve the mechanical properties and interfacial performance. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and contact angle testing and analysis were applied to characterize the carbon fibers surface. Tensile testing, bending testing and interlayer shear strength (ILSS) testing were employed to analyze the mechanical properties of composites. The experimental results of SEM and XPS indicate that CNTs and OA-POSS are grafted uniformly on fibers surface with chemical bonding of NH in CNTs and POSS and COOH on CFs surface. The contact angle test and analysis results show that the surface energy of modified CFs decrease compared with that of the unmodified. Furthermore, the mechanical properties of composites after coating with CNTs and OA-POSS are enhanced effectively. Especially, the properties of composites fabricated by CF/1%CNTs/POSS are significantly improved, because OA-POSS increases the interfacial strength and CNTs increases the thickness of the interfacial transition layer, which both improves the interface defects diffusion of composites. Therefore, CF/CNTs/POSS can improve the performance of the composites by forming interface transition layers.

更新日期：2018-07-01

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