A kind of carbon nanotube dry glue suitable for underwater adhesion, preparation method and application thereof
A carbon nanotube and carbon nanotube array technology, which is applied in the directions of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of low adhesion strength of carbon nanotube dry glue, and solve the problem of adhesion strength. Greatly reduce, ensure adhesion, and increase the effect of contact area
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[0028] see figure 1 , the preparation method of carbon nanotube dry glue suitable for underwater adhesion provided by the present invention, the preparation method mainly includes the following steps:
[0029] Step 1, growing a carbon nanotube array with uniform tube diameter and certain height and density on the silicon substrate. Specifically include the following steps:
[0030] 1. A buffer layer is plated by magnetron sputtering on a silicon substrate, and a catalyst film is plated on the buffer layer.
[0031] Specifically, the crystal plane orientation of the silicon wafer substrate is N-type single-polished single crystal silicon with a crystal plane orientation of 001; the selective magnetron sputtering method deposits an alumina buffer layer and an iron catalyst film successively to ensure the uniformity of the thickness of the catalyst film and facilitate the preparation of The diameter of the carbon nanotubes is uniform during the process.
[0032] 2. Putting the...
Embodiment 1
[0046] The preparation method of carbon nanotube dry glue suitable for underwater adhesion provided by Example 1 of the present invention mainly includes the following steps:
[0047] (1) Use magnetron sputtering (PVD) to polish a silicon wafer (with an area of 25mm) on one side 2 ) is coated with an alumina buffer layer and an iron catalyst thin film, wherein the alumina buffer layer is sputtered by radio frequency reaction, and 15 sccm (standard milliliters / minute) of high-purity argon gas is introduced, the sputtering power is 200W, and the reaction time is 10min; the iron catalyst The thin film was sputtered by direct current, 12 sccm of high-purity argon gas was introduced, the sputtering power was 20W, and the sputtering time was 45s. The final prepared alumina buffer layer has a thickness of 10 nm, and the iron catalyst thin film has a thickness of 2 nm.
[0048] (2) Prepare carbon nanotube arrays by water-assisted chemical vapor deposition, wherein the diameter of t...
Embodiment 2
[0054] The preparation method of carbon nanotube dry glue suitable for underwater adhesion provided by Example 2 of the present invention is basically the same as Example 1, the difference is that the carbon source in step (2) is 15%, and the growth time range is 150s to 180s , the height of the prepared carbon nanotube arrays ranges from 50 μm to 300 μm, and the density range is 15 mg / cm 3 ~35mg / cm 3 . Get a height of 52μm and a density of 32mg / cm 3 And the height is 278μm, the density is 30mg / cm 3 The underwater adhesion strength of the dopamine-modified carbon nanotube dry adhesive on the stainless steel substrate is 3.96N / cm 2 、13.6N / cm 2 , and the promotion multiples are 1.12 and 1.96. And the height is 267μm, the density is 19mg / cm 3 The underwater adhesion strength of the dopamine-modified carbon nanotube dry adhesive is 5.64N / cm 2 , the promotion factor is 1.06.
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