Adhesion performance of gecko-inspired flexible carbon nanotubes dry adhesive

Li, Yang; Zhang, Hao; Xu, Geng; Gong, Ling; Yong, Zhang; Li, Qinwen; Zhang, Dai

doi:10.1117/12.2012009

Cited by 8 publications

(11 citation statements)

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“…The institutive test method has been widely used to test the adhesion performance of VACNTs in previous research [11,[13][14][15]19]. Samples 5 mm × 5 mm in size were preloaded (~40 N/cm 2 ) onto glass surfaces to form sufficient contact between the VACNTs and the test surface.…”

Section: Adhesive Performance Test Of Vacntsmentioning

confidence: 99%

“…Such dry adhesives generally have micro-nano array structures, and are expected to be suitable for robotic end-effectors [4][5][6][7]. At present, there are generally two main types of materials being researched as materials for gecko-inspired dry adhesives [8]: Synthetic polymers [5,9,10] and vertically-aligned carbon nanotubes (VACNTs) [11][12][13][14]. Among them, the nano-scale diameters of carbon nanotubes are far less than the micro-scale diameters of the generally polymeric fibers.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Hydrogen Concentration on the Growth of Carbon Nanotube Arrays for Gecko-Inspired Adhesive Applications

Duan

et al. 2017

Coatings

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Vertically-aligned carbon nanotubes (VACNTs) have extraordinary structural and mechanical properties, and have been considered as potential candidates for creating dry adhesives inspired by adhesive structures in nature. Catalytic chemical vapor deposition is widely used to grow VACNTs; however, the influential mechanism of VACNT preparation parameters (such as H 2 concentration) on its adhesion property is not clear, making accurate control over the structure of VACNTs adhesive an ongoing challenge. In this article, we use electron beam-deposited SiO 2 /Al 2 O 3 as a support layer, Fe as catalyst, and C 2 H 4 /H 2 gas mixtures as a feed gas to prepare VACNTs, while varying the ratio of the reducing atmosphere (H 2 ) from 0% to 35%. VACNTs synthesized at a 15% H 2 concentration (5 mm × 5 mm in size) can support a maximal weight of 856 g, which indicates a macroscopic shear adhesive strength of 34 N/cm 2 . We propose a hydrogen-concentration-dependent model for the shear adhesive performance of VACNTs. By adjusting the amount of hydrogen present during the reaction, the morphology and quality of the prepared VACNTs can be precisely controlled, which significantly influences its shear adhesive performance. These results are advantageous for the application of carbon nanotubes as dry adhesives.

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Section: Adhesive Performance Test Of Vacntsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Hydrogen Concentration on the Growth of Carbon Nanotube Arrays for Gecko-Inspired Adhesive Applications

Duan

et al. 2017

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“…N/cm 2 [4] , 足以支撑其自身重量, 同时可以毫不费力地快速移动(>1 m/s) [5] . 壁虎脚掌刚毛优异的黏附性能使科研人员一直致力于用新型材料与仿生技术结合, 研制用于仿壁虎爬壁机器人脚掌干黏附材料 [6,7] .…”

Section: 华力产生黏附作用壁虎单个脚掌的黏附力可达10unclassified

“…随后 , Hsieh等人 [26] 通过同样的方法将预先图案化的 VACNTs转移至PC基底上, 并研究了柔性基底上图案化VACNTs的光学特征. In等人 [27] [28,29] [4,6] . 切向黏附强度均呈上升趋势.…”

Section: 化学气相沉积法(Cvd)制备vacnts因高产量、unclassified

干黏附碳纳米管垂直阵列的转移及其黏附性能评价

Luo¹,

Li²,

Yao³

et al. 2015

Chin. Sci. Bull.

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“…自1991 年碳纳米管(carbon nanotube, CNT)被发现以来, 就因其优异的力学性能, 独特的导电、导热性及良好的化学稳定性备受关注 [17] . 通过化学气相沉积法(chemical vapor deposition, CVD)制备的垂直定向排列CNT阵列, 结构可控, 抗压缩性能、黏附性能优良, 微米级的碳纳米管束和纳米级的单根碳纳米管层级结构与壁虎脚掌的刚毛束、绒毛匙突具有尺度、结构相似性, 因此被用于仿壁虎爬壁机器人脚掌仿生吸附材料 [18] .…”

Section: 壁虎刚毛以范德华力为主毛细力为辅的黏附机制unclassified

Adhesion of a carbon nanotube array and its polydimethylsiloxane composite in vacuum and thermal vacuum

Wang

et al. 2015

Chin. Sci. Bull.

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Developing dry adhesion technologies for space environments will greatly enhance the manned spaceflight, on-orbit servicing, and operational capability of non-cooperative targets. The complexity of space conditions requires strict standards for the performance of adhesives in aerospace devices. In this study, vacuum and thermal vacuum environments are simulated for testing the frictional attachment-detachment properties and adhesion strength of a carbon nanotube (CNT) array and polydimethylsiloxane (PDMS)/CNT array composite. In vacuum, the frictional attachment-detachment behavior of both CNT array and PDMS/CNT array composite shows no obvious differences from that in atmospheric environment. The frictional adhesion strength of the composite is improved in vacuum, whereas that of the CNT array remains unchanged compared with those in atmospheric environment. Both materials exhibit good adhesion stability and reusability in vacuum and atmospheric environment. In thermal vacuum, the normal and shear adhesion strength are maintained for the CNT array and the composite. In vacuum and thermal vacuum, the CNT array and its composite retain effective adhesion properties, and could form the basis of a CNT dry adhesive for space application. vacuum, thermal vacuum, carbon nanotube, polydimethylsiloxane, adhesion

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Adhesion performance of gecko-inspired flexible carbon nanotubes dry adhesive

Cited by 8 publications

References 0 publications

Effect of Hydrogen Concentration on the Growth of Carbon Nanotube Arrays for Gecko-Inspired Adhesive Applications

Effect of Hydrogen Concentration on the Growth of Carbon Nanotube Arrays for Gecko-Inspired Adhesive Applications

干黏附碳纳米管垂直阵列的转移及其黏附性能评价

Adhesion of a carbon nanotube array and its polydimethylsiloxane composite in vacuum and thermal vacuum

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