干黏附碳纳米管阵列的制备、转移及黏附性能研究

发布时间：2018-05-21 03:08

本文选题：仿壁虎刚毛 + 碳纳米管阵列　；参考：《南京航空航天大学》2015年硕士论文

【摘要】：碳纳米管阵列(VACNTs)具有高长径比、优异的力学性能、微纳米尺度下的可控结构,在仿壁虎干黏附材料领域具有广阔的应用前景。本文首先研究了化学气相沉积过程关键生长工艺因素对VACNTs形貌结构的影响,并针对硅基底上碳纳米管阵列作为仿壁虎干黏附材料的结合力较弱和表面适应性较差的问题,从转移阵列和制备阵列两方面,提出解决碳纳米管干黏附材料受基底材料限制的方法。1、随H2前处理温度升高,VACNTs生长速率增大,表面杂质缺陷含量减少。VACNTs的高度随碳源浓度和生长时间的增加而增大。宏观黏附性能测试表明,VACNTs的切向黏附强度随VACNTs高度增加而先增大后减小,最大切向黏附强度达22 N/cm2。黏附重复性测试表明,第一次测试后得到倾斜的VACNTs,使第二次测试可获得更大的切向黏附强度,随重复测试次数增加,切向黏附强度再次降低。黏附耐用性测试表明,VACNTs在20 N/cm2的切向黏附强度下,可持续96 min。2、通过热氧化分离法和加热转移法相结合,将VACNTs转移至柔性聚碳酸酯(PC)基底。优化转移工艺后,VACNTs与PC界面结合强度约是转移前的12倍,整体结构稳定,并能保持良好的柔韧性。黏附性能测试表明,底端转移和顶端转移VACNTs的切向黏附强度均随法向预载荷的增加而增大,在16 N/cm2的法向预载荷下,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,底端转移的VACNTs在黏附性能上优于顶端转移。3、采用化学气相沉积法在铜基底上制备石墨烯-碳纳米管阵列新型复合结构材料,扫描电镜显示,铜基底上得到一种类似壁虎脚掌刚毛结构的碳纳米管束。纳米划痕测试表明,铜基底上石墨烯/碳纳米管阵列界面结合力约为0.65 m N,是Si基底VACNTs界面结合力的6.5倍。
[Abstract]:Carbon nanotube arrays (VACNTs) have high aspect ratio, excellent mechanical properties, controllable structure in microscale and nano-scale, and have a wide application prospect in the field of Gecko dry adhesives. In this paper, the influence of key growth process factors on the morphology and structure of VACNTs was studied, and the problem that carbon nanotube array on silicon substrate was used as Gecko dry adhesive material was weak and the surface adaptability was poor. From two aspects of transfer array and fabrication array, the method of solving the limitation of carbon nanotube dry adhesion material by substrate material is proposed. The growth rate of VACNTs increases with the increase of H _ 2 pretreatment temperature, and the growth rate of VACNTs increases with the increase of H _ 2 pretreatment temperature. The height of VACNTs increased with the increase of carbon source concentration and growth time. The results of macroscopic adhesion test show that the tangential adhesion strength increases firstly and then decreases with the increase of VACNTs height, and the maximum tangential adhesion strength is 22 N / cm 2. The adhesion repeatability test shows that the inclined VACNTs can be obtained after the first test, so that the second test can obtain greater tangential adhesion strength, and the tangential adhesion strength decreases again with the increase of the number of repeated tests. The adhesive durability test showed that VACNTs could last 96 min 路2 under the tangential adhesion strength of 20 N/cm2. The VACNTs was transferred to the flexible polycarbonate (PC) substrate by the combination of thermal oxidation separation method and heating transfer method. The bonding strength between VACNTs and PC is about 12 times as high as that before transfer, the whole structure is stable and the flexibility is good. The results of adhesion test show that the tangential adhesion strength of bottom transfer VACNTs and tip transfer VACNTs increases with the increase of normal preload. Under normal preload of 16 N/cm2, the tangential adhesion strength of VACNTs increases with the increase of normal preload. The tangential adhesion strength of bottom transfer VACNTs is about 5 N / cm 2, and that of top transfer VACNTs is about 2.8 N / cm 2. The bottom transfer VACNTs is superior to top transfer .3. graphene carbon was prepared on copper substrate by chemical vapor deposition. Nanotube arrays novel composite structure materials, Scanning electron microscopy (SEM) showed that a carbon nanotube bundle was obtained on the copper substrate, which was similar to the bristles of gecko's soles. The results of nano-scratch test show that the interface adhesion of graphene / carbon nanotube array on copper substrate is about 0.65 mn, which is 6.5 times higher than that of Si substrate VACNTs interface.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;O613.71

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