Effects of multi-walled carbon nanotube/graphene oxide-based sizing on interfacial and tribological properties of continuous carbon fiber/poly (ether ether ketone) composites
Effects of multi-walled carbon nanotube/graphene oxide-based sizing on interfacial and tribological properties of continuous carbon fiber/poly (ether ether ketone) composites
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多壁碳纳米管/氧化石墨烯基施胶对连续碳纤维/聚醚醚酮复合材料界面和摩擦学性能的影响
DOI：
10.1016/j.matchemphys.2021.125344
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发表时间：
2021-10-14
影响因子：
4.6
通讯作者：
Zhou, Huamin
中科院分区：
文献类型：
--
作者：
Lai, Minlong;Jiang, Lin;Zhou, Huamin
典型的碳基纳米颗粒，包括多壁碳纳米管和GO，是改善复合材料界面性能的有希望的候选者。因此，了解哪种纳米粒子更有利于CF/PEEK复合材料的性能提高是非常必要的。本研究合成了热稳定的可溶性s-PEEK，并将其用作施胶剂的基础部分。将氨基官能化的MWCNTs和GO分别分散在s-PEEK溶液中，制成复合施胶剂，分别沉积在碳纤维表面。改性后的复合材料在保持其高拉伸强度的同时，提高了层间剪切强度和摩擦学性能。在界面区域高负载的多壁碳纳米管更有效地提高复合材料的整体性能。相反，稀GO基复合施胶剂在改善性能方面是有益的。0.05wt%GO/s-PEEK施胶剂施胶后，CF/PEEK复合材料层间剪切强度最大为72.8MPa，比未施胶前提高了56.37%。1wt%MWCNTs/s-PEEK复合材料的摩擦系数最低，磨损量降低了31.71%。最后，通过对界面结构的深入分析，解释了多壁碳纳米管与GO基复合施胶剂界面增强机理的差异。
Typical carbon-based nanoparticles, including MWCNTs and GO, are promising candidates for improving the interfacial properties of composites. It is imperative to know which kinds of nanoparticles are more favorable for performance improvement of CF/PEEK composites. In this study, the thermally stable and soluble s-PEEK is synthesized and utilized as the basic part of sizing agent. Amino-functionalized MWCNTs and GO were separately dispersed in the s-PEEK solution to make the complex sizing agents, which were deposited on the surface of CFs respectively. The modified composites presented improved ILSS and tribological performance, simultaneously preserved their high tensile strength. Highly loaded MWCNTs in the interfacial region was more effective to enhance the overall performance of composites. Conversely, dilute GO-based complex sizing agent was beneficial in terms of improved properties. The maximum ILSS of CF/PEEK laminate was 72.8 MPa after 0.05 wt% GO/s-PEEK agent sizing, which was 56.37% higher than that of pristine composites. A lowest friction coefficient was recorded for 1 wt% MWCNTs/s-PEEK sizing laminates, and the wear extent was reduced by 31.71% after modification. Finally, the interfacial reinforcing mechanism disparities of MWCNTs and GO based complex sizing agent were explained by thoroughly analyzing the interfacial structure.