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A kind of carbon nanotube dry glue capable of recycling and preparation method thereof

A carbon nanotube, carbon nanotube array technology, applied in the direction of amide/imide polymer adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the problems of poor recycling performance, etc. Achieve the effect of low cost, improved recycling performance and high efficiency

Active Publication Date: 2021-12-03
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a carbon nanotube dry glue that can be recycled and its preparation method, which utilizes a carbon nanotube array with specific structural parameters, and simultaneously utilizes the temperature of the thermosensitive polymer Response characteristics, the recycling of carbon nanotube dry glue is realized by changing the ambient temperature, and a carbon nanotube imitation gecko dry glue with recycling performance is successfully provided, which solves the problem of carbon nanotube dry glue in the process of cyclic adhesion Irreversible bending deformation occurs, which leads to technical problems of poor cycle performance

Method used

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  • A kind of carbon nanotube dry glue capable of recycling and preparation method thereof
  • A kind of carbon nanotube dry glue capable of recycling and preparation method thereof
  • A kind of carbon nanotube dry glue capable of recycling and preparation method thereof

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preparation example Construction

[0031] see figure 1 , the preparation method of the recyclable carbon nanotube dry glue provided by the present invention, the preparation method mainly includes the following steps:

[0032]Step 1, growing a carbon nanotube array on a silicon substrate. The diameter of the carbon nanotube array is uniform and has a predetermined height and density.

[0033] Step one specifically includes the following steps:

[0034] (1) A buffer layer is plated on the silicon substrate by magnetron sputtering, and then a catalyst film is plated on the buffer layer.

[0035] The crystal plane orientation of the silicon wafer base is N-type single-polished single-crystal silicon of 001; the selective magnetron sputtering method successively deposits an alumina buffer layer and an iron catalyst film to ensure the uniformity of the thickness of the catalyst film and promote the preparation process. The carbon nanotubes have a uniform diameter.

[0036] (2) Putting the silicon wafer substrate...

Embodiment 1

[0049] The preparation method of the recyclable carbon nanotube dry glue provided in Example 1 of the present invention mainly includes the following steps:

[0050] (1) Using magnetron sputtering (PVD) at 5*5mm 2 Aluminum oxide buffer layer and iron catalyst are coated on the surface of single-sided polished silicon wafer, wherein the alumina buffer layer adopts radio frequency reactive sputtering, feeds high-purity argon gas 12 sccm (standard ml / min), high-purity oxygen gas 3 sccm, sputtering power is 200W, the reaction time is 10min; the iron catalyst is sputtered by direct current, 12sccm of high-purity argon gas is introduced, the sputtering power is 20W, and the sputtering time is 30s. The thickness of the finally prepared alumina buffer layer is 10 nm, and the thickness of the iron catalyst is 4 nm.

[0051] (2) adopt water-assisted chemical vapor deposition method to prepare carbon nanotube array, wherein, the diameter of tube's furnace is 1 inch, and gas total flow i...

Embodiment 2

[0058] The preparation method of the recyclable carbon nanotube dry glue provided by Example 2 of the present invention is basically the same as that of Example 1, the difference is that the growth time in step (2) ranges from 150 to 180s, and the prepared carbon nanotube array has a height of The range is 50~250μm, the density range is 15~30mg / cm 3 . The obtained carbon nanotube / poly(N-isopropylacrylamide) composite dry adhesive with carbon nanotube height of 56 μm and 208 μm in water has an underwater adhesion strength of 3.76 N / cm 2 、4.28N / cm 2 , by changing the temperature to conduct a cycle adhesion strength test, cycle until the adhesion strength 2 , the number of cycles recorded as image 3 shown.

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Abstract

The invention belongs to the related technical field of carbon nanotube dry glue, which discloses a carbon nanotube dry glue that can be recycled and a preparation method thereof. The method includes the following steps: (1) coating the end of the carbon nanotube array Covering a layer of paraffin; (2) placing the carbon nanotube array in the polymer monomer solution, and sequentially adding an initiator, an accelerator and a crosslinking agent to carry out solution polymerization, and then obtaining a carbon nanotube dry glue; wherein, The polymer monomer solution is N-isopropylacrylamide. The invention utilizes the carbon nanotube array with specific structural parameters, and utilizes the temperature response characteristics of thermosensitive polymers to realize the recycling of carbon nanotube dry glue by changing the ambient temperature, and successfully provides a carbon nanotube with recycling performance. Nanotubes imitate gecko dry glue, which solves the technical problem of irreversible bending deformation of carbon nanotube dry glue in the process of cyclic adhesion, which leads to poor recycling performance.

Description

technical field [0001] The invention belongs to the related technical field of carbon nanotube dry glue, and more specifically relates to a recyclable carbon nanotube dry glue and a preparation method thereof. Background technique [0002] Since Autumn et al. revealed that the magical ability of geckos to "fly over walls" is the result of the accumulation of van der Waals forces between the setae on their feet and the contact surface, people have launched a lot of research on imitation gecko dry glue. Gecko feet have a unique micro-nano-level hierarchical structure, which makes them have excellent adhesion properties, such as high adhesion strength (10N / cm 2 ), high cycle times (not less than 30,000 times), good adaptability to surfaces with different roughnesses and self-cleaning properties. Due to these excellent characteristics, imitation gecko dry glue came into being. So far, the preparation of imitation gecko dry glue at home and abroad is developing in a simpler and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/24C09J11/04C08F220/54C08F222/38
CPCC08F220/54C08K2201/011C09J11/04C09J133/24C08K9/10C08K3/041C08F222/385
Inventor 徐鸣吴思佳周笛张蒙蒙
Owner HUAZHONG UNIV OF SCI & TECH
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