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CN-116925692-B - Vertical carbon nano tube array/diamond-like film composite adhesion material, preparation method and application

CN116925692BCN 116925692 BCN116925692 BCN 116925692BCN-116925692-B

Abstract

The invention provides a preparation method of a vertical carbon nanotube array/diamond-like film composite adhesive material, which comprises the steps of uniformly covering a transfer medium on a target flexible substrate and heating the transfer medium to form a semi-solidified state, overturning the vertical carbon nanotube array on a silicon substrate, applying pressure to adhere the vertical carbon nanotube array on the surface of the semi-solidified transfer medium, fully combining the transfer medium with the vertical carbon nanotube array through heating and solidifying, stripping the vertical carbon nanotube array from the silicon substrate to obtain a top-transferred vertical carbon nanotube array, and depositing a diamond-like film on the surface of the vertical carbon nanotube array by utilizing a radio frequency plasma deposition technology to obtain the vertical carbon nanotube array/diamond-like film composite adhesive material. The invention utilizes the excellent mechanical property of diamond-like carbon and improves the adhesion characteristic of the vertical carbon nanotube array, and the invention has the advantages of simple method, easy operation and the like by increasing the contact area between the top end of the vertical carbon nanotube array and the surface to be adhered.

Inventors

  • SU YANJIE
  • MU ZHONGCHENG
  • Zhang Luoqian

Assignees

  • 上海交通大学

Dates

Publication Date
20260512
Application Date
20220412

Claims (8)

  1. 1. A method for preparing a vertical carbon nano tube array/diamond-like film composite adhesion material is characterized in that the material consists of a vertical carbon nano tube array and a diamond-like film on the surface of the vertical carbon nano tube array, The preparation method comprises the following steps: Step one, uniformly covering a transfer medium on a target substrate; step two, the vertical carbon nanotube array on the silicon substrate is subjected to high-temperature pre-oxidation treatment and then is turned over to be placed on the target substrate, and normal pressure is applied to enable the vertical carbon nanotube array to be adhered to the surface of the semi-solidified transfer medium; step three, after heating treatment, stripping the vertical carbon nanotube array from the silicon substrate to obtain a top-transferred vertical carbon nanotube array; depositing a diamond-like film on the surface of the vertical carbon nanotube array by using an ion chemical vapor deposition process to obtain a vertical carbon nanotube array/diamond-like film composite adhesion material; the transfer medium in the first step is Polydimethylsiloxane (PDMS) or polyurethane, and the transfer medium is in a semi-cured state; And in the second step, the high-temperature pre-oxidation treatment condition is that the treatment is carried out in air at 450-550 ℃, and the high-temperature pre-oxidation treatment time is 5-15 min.
  2. 2. The method for preparing a composite adhesion material of a vertical carbon nanotube array/diamond-like film according to claim 1, wherein the semi-cured transfer medium is formed by heating and curing on a hot plate at 60-70 ℃ for 1-2 hours.
  3. 3. The method for preparing a composite adhesion material of a vertical carbon nanotube array/diamond-like film according to claim 1, wherein the normal pressure in the second step is 0.2-0.8 n/cm 2 .
  4. 4. The method for preparing a composite adhesion material of a vertical carbon nanotube array/diamond-like film according to claim 1, wherein the heating treatment temperature in the third step is 60-70 ℃, and the heating treatment curing time is 2-6 hours.
  5. 5. The method for preparing the vertical carbon nanotube array/diamond-like film composite adhesion material according to claim 1, wherein the evaporation power of the ion-based chemical vapor deposition process in the fourth step is 500-700 w, and the deposition time of the ion-based chemical vapor deposition process is 2-10 min.
  6. 6. The method for preparing a composite adhesion material of a vertical carbon nanotube array and a diamond-like film according to claim 1, wherein the thickness of the diamond-like film in the fourth step is 10-50 nm.
  7. 7. A vertical carbon nanotube array/diamond-like film composite adhesion material produced by the production method of any one of claims 1 to 6.
  8. 8. The application of the vertical carbon nanotube array/diamond-like film composite adhesion material according to claim 7, wherein the application of the material in the field of bionic adhesion is particularly used for climbing in the vertical direction of the ground and adhesion grabbing of space fragments.

Description

Vertical carbon nano tube array/diamond-like film composite adhesion material, preparation method and application Technical Field The invention relates to the field of novel bionic adhesion materials, in particular to a vertical carbon nano tube array/diamond-like film composite adhesion material, a preparation method and application. Background The excellent adhesion crawling capability of the gecko benefits from the micro-nano hierarchical structure bristles densely distributed on the toe ventral surface, and when the micro-nano hierarchical structure with high super adhesion capability is in close contact with the surface, weak van der Waals force can be generated and gathered into macroscopic adhesion force, so that the gecko adhesion system has excellent performances of high strong adhesion, easiness in desorption, repeatable adhesion and the like. The adhesion of such structures to the contact surface is believed to be a van der waals effect that is not directional and saturated and is a dry adhesion. In recent years, the development and the development of bionic dry adhesion materials based on the dry adhesion mechanism are receiving more and more attention. The carbon nanotube is a seamless hollow spiral tubular nano structure formed by curling graphene sheets according to a certain spiral angle, has excellent physical and chemical characteristics, and particularly has a Young modulus as high as 1TPa, a flexural modulus as high as 0.91-1.24TPa, tensile strength 100 times that of steel, density of only 1/6 of that of steel and elongation at break as high as 15% -30%. The excellent structure, physical and chemical properties and the adaptability of space environment make the carbon nano tube an important component for preparing the bionic adhesion material. The carbon nano tube bristle array which is vertically and directionally arranged has the advantages of finer structure, no adhesion, good mechanical property, high theoretical adhesion strength (which can exceed 500N/cm 2 and is 50 times of the adhesion strength of gecko soles), mass production and the like, and is expected to replace a polymer adhesion material. Through prior art search, patent number ZL201310284325.2 discloses an adhesive material for a gecko sole-like adhesive array and a preparation method thereof, and the adhesive material is a composite material formed by mixing a silicon elastomer main agent A component, a cross-linking agent B component and carbon nanotubes according to a certain proportion and curing at a proper temperature (70-100 ℃). Wherein the silicon elastomer main agent A component is the A component of the dakangnin 184, and the cross-linking agent B component is formed by mixing the B component of the dakangnin 184 and the B component of the dakangnin 186. The tangential adhesion can reach 4N/cm2, and the normal adhesion can reach 1N/cm2. However, from a microscopic view, the contact area between the top end of the vertical carbon nanotube array and the to-be-adhered is still limited, and compared with the gecko sole bristles, the vertical carbon nanotube array has to be improved in terms of adhesion performance and material strength, and meanwhile, the system research on how to improve the adhesion performance under the condition of fixed array density is lacking. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a vertical carbon nano tube array/diamond-like film composite adhesion material and a preparation method thereof, wherein the diamond-like film is utilized to increase the contact area between the top end of the vertical carbon nano tube array and a material to be adhered, and meanwhile, the excellent mechanical properties of diamond-like are utilized to improve the adhesion performance of the vertical carbon nano tube array. The invention aims at realizing the following scheme: the first aspect of the invention provides a method for preparing a composite adhesion material of a vertical carbon nanotube array and a diamond-like film, which is characterized in that the material consists of the vertical carbon nanotube array and the diamond-like film on the surface of the vertical carbon nanotube array, The preparation method comprises the following steps: Step one, uniformly covering a transfer medium on a target substrate; Step two, the vertical carbon nanotube array on the silicon substrate is turned over and placed on the target substrate after high-temperature pre-oxidation treatment, and normal pressure is applied to adhere the vertical carbon nanotube array on the surface of the semi-solidified transfer medium; Step three, after heating treatment, stripping the vertical carbon nanotube array from the silicon substrate to obtain a top-transferred vertical carbon nanotube array; and fourthly, depositing a diamond-like film on the surface of the vertical carbon nano tube array by utilizing an ion chemical vapor deposition process to obtain the vertical carbon