Interfacial reinforced carbon fiber composites inspired by biological interlocking structure

作者：Yufei Wang, Zhengzhi Mu, Zhiyan Zhang, Wenda Song, Shuang Zhang, Handong Hu, Zhe Ma, Liewei Huang, Dashun Zhang, Ze Wang, Yujiao Li, Binjie Zhang, Bo Li, Junqiu Zhang, Shichao Niu, Zhiwu Han, Luquan Ren · 发表于：iScience · 年份：2022 · DOI：10.1016/j.isci.2022.104066 · 被引用次数：18 · 研究领域：Fiber-reinforced polymer composites、Surface Modification and Superhydrophobicity、Additive Manufacturing and 3D Printing Technologies

Weak interfacial activity and poor wettability between fiber and matrix are known to be the two main factors that restrict the mechanical properties of carbon fiber-reinforced composites (CFRCs). Herein, inspired by high strength and toughness characteristics of wing feathers of Black Kite ( Milvus migrans ), natural hook-groove microstructure system (HGMS) and underlying mechanical interlocking mechanism were carefully investigated. Biomimetic HGMS based on dopamine-functionalized carbon fibers and ZnO nanorods were constructed successfully by a two-step modification method to enhance interfacial adhesion. Further, CFRCs featured with biomimetic HGMS were prepared by a vacuum-assisted contact molding method. Experimental results confirmed that flexural strength and interlaminar shear strength of the bioinspired CFRCs were effectively improved by 40.02 and 101.63%, respectively. The proposed bioinspired design strategy was proved to be flexible and effective and it was anticipated to provide a promising design approach and facile fabrication method for desirable CFRCs with excellent mechanical properties.