本文選題：仿壁虎剛毛 + 碳納米管陣列��； 參考：《南京航空航天大學》2015年碩士論文

【摘要】：碳納米管陣列(VACNTs)具有高長徑比、優(yōu)異的力學性能、微納米尺度下的可控結構,在仿壁虎干黏附材料領域具有廣闊的應用前景。本文首先研究了化學氣相沉積過程關鍵生長工藝因素對VACNTs形貌結構的影響,并針對硅基底上碳納米管陣列作為仿壁虎干黏附材料的結合力較弱和表面適應性較差的問題,從轉移陣列和制備陣列兩方面,提出解決碳納米管干黏附材料受基底材料限制的方法。1、隨H2前處理溫度升高,VACNTs生長速率增大,表面雜質缺陷含量減少。VACNTs的高度隨碳源濃度和生長時間的增加而增大。宏觀黏附性能測試表明,VACNTs的切向黏附強度隨VACNTs高度增加而先增大后減小,最大切向黏附強度達22 N/cm2。黏附重復性測試表明,第一次測試后得到傾斜的VACNTs,使第二次測試可獲得更大的切向黏附強度,隨重復測試次數(shù)增加,切向黏附強度再次降低。黏附耐用性測試表明,VACNTs在20 N/cm2的切向黏附強度下,可持續(xù)96 min。2、通過熱氧化分離法和加熱轉移法相結合,將VACNTs轉移至柔性聚碳酸酯(PC)基底。優(yōu)化轉移工藝后,VACNTs與PC界面結合強度約是轉移前的12倍,整體結構穩(wěn)定,并能保持良好的柔韌性。黏附性能測試表明,底端轉移和頂端轉移VACNTs的切向黏附強度均隨法向預載荷的增加而增大,在16 N/cm2的法向預載荷下,底端轉移VACNTs的切向黏附強度約5 N/cm2,頂端轉移VACNTs的切向黏附強度約2.8 N/cm2,底端轉移的VACNTs在黏附性能上優(yōu)于頂端轉移。3、采用化學氣相沉積法在銅基底上制備石墨烯-碳納米管陣列新型復合結構材料,掃描電鏡顯示,銅基底上得到一種類似壁虎腳掌剛毛結構的碳納米管束。納米劃痕測試表明,銅基底上石墨烯/碳納米管陣列界面結合力約為0.65 m N,是Si基底VACNTs界面結合力的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.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB383.1;O613.71

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本文編號：1917460