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碳纳米管垂直阵列(VACNTs)具有高长径比、优异的力学性能,在仿壁虎干黏附材料领域具有广阔的应用前景.但适合其生长的硅基底本身硬脆以及阵列与生长基底结合力较弱是制约VACNTs在干黏附材料中应用发展的主要问题.本文提出一种简单高效的转移方法,将VACNTs转移至柔韧的聚碳酸酯(PC)基底,再进行切向黏附性能测试,并从顶部形貌结构与石墨化程度两方面分析切向黏附强度测试结果.对转移工艺进行优化以后,VACNTs与PC之间形成较强结合力,底端转移和顶端转移后获得2种不同的顶部结构.黏附性能测试结果表明,VACNTs切向黏附强度均随法向预载荷增加而增大,当施加16N/cm2的预载荷时,底端转移VACNTs的切向黏附强度约5 N/cm2,顶端转移VACNTs的切向黏附强度约2.8 N/cm2.该转移方法具有普遍适用性,不受转移阵列面积的限制,转移后的黏附材料整体柔韧性提高,为VACNTs作为仿壁虎干黏附材料的应用创造了有利条件.
VACNTs have high aspect ratio and excellent mechanical properties, and have broad application prospects in the field of imitation gecko dry adhesion materials. However, the growth of the silicon substrate itself hard and brittle and the combination of the array and the growth substrate more Weakness is the main problem restricting the development of VACNTs in the application of dry adhesion materials.In this paper, a simple and efficient transfer method is proposed to transfer VACNTs to a flexible polycarbonate (PC) substrate, and then to conduct tangential adhesion test, Morphology structure and graphitization degree.After optimizing the transfer process, VACNTs and PC formed strong binding force, and two different top structures were obtained after the bottom transfer and top transfer. The results of the adhesion test showed that the tangential adhesion strength of VACNTs increased with the increase of normal preload, and the tangential adhesion strength of VACNTs was about 5 N / cm2 when the preload was 16 N / cm2. The apical adhesive VACNTs Of the tangential adhesion strength of about 2.8 N / cm2 The transfer method has universal applicability, not limited by the transfer array area, the overall flexibility of the adhesive material after transfer increased, as the VACNTs Application Tiger dry adhesion material created favorable conditions.