Wang Yufei, Mu Zhengzhi, Zhang Zhiyan, Song Wenda, Zhang Shuang, Hu Handong, Ma Zhe, Huang Liewei, Zhang Dashun, Wang Ze, Li Yujiao, Zhang Binjie, Li Bo, Zhang Junqiu, Niu Shichao, Han Zhiwu, Ren Luquan
Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China.
School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, China.
iScience. 2022 Mar 12;25(4):104066. doi: 10.1016/j.isci.2022.104066. eCollection 2022 Apr 15.
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 (), 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.
纤维与基体之间较弱的界面活性和较差的润湿性是限制碳纤维增强复合材料（CFRCs）力学性能的两个主要因素。在此，受黑鸢翅膀羽毛高强度和高韧性特性的启发，对天然钩-槽微观结构系统（HGMS）及其潜在的机械联锁机制进行了深入研究。通过两步改性方法成功构建了基于多巴胺功能化碳纤维和ZnO纳米棒的仿生HGMS，以增强界面粘附力。此外，采用真空辅助接触成型法制备了具有仿生HGMS的CFRCs。实验结果证实，仿生CFRCs的弯曲强度和层间剪切强度分别有效提高了40.02%和101.63%。所提出的仿生设计策略被证明是灵活有效的，有望为具有优异力学性能的理想CFRCs提供一种有前景的设计方法和简便的制造方法。
