CN-117720098-B - Preparation method of conductive high-wear-resistance carbon nanotube film

Abstract

The invention relates to the field of conductive wear-resistant superhydrophobic, in particular to a preparation method of a conductive high wear-resistant carbon nanotube film. According to the invention, the pretreated carbon nanotube film is coated with the epoxy resin layer for pre-curing, then the HD/KH570/SiO 2 solution is sprayed on the surface of the pre-cured epoxy resin layer, and the carbon nanotube film with high conductivity and high wear resistance can be formed by curing after spraying the coating.

Inventors

• GUO GUANGDE
• GONG XIAOJING

Assignees

• 常州大学

Dates

Publication Date

20260505

Application Date

20231129

Claims (5)

1. 1. A preparation method of a conductive high wear-resistant carbon nanotube film is characterized by comprising the following preparation steps: (1) Dissolving epoxy resin and an epoxy resin curing agent in a solvent, performing ultrasonic treatment to form a viscous solution, coating the viscous solution on a carbon nano tube film, and performing pre-curing, wherein the pre-curing temperature is regulated to 80 ℃, and the pre-curing time is 20min; (2) The preparation method comprises the steps of weighing nano SiO 2 particles, dissolving the nano SiO 2 particles in absolute ethyl alcohol, carrying out ultrasonic stirring to obtain a solution A, adding a silane coupling agent KH-570 into a beaker of deionized water, carrying out ultrasonic stirring to fully hydrolyze the silane coupling agent KH-570 to obtain a solution B, mixing the solution A, the solution B and the HDTMS, carrying out stirring reaction at a temperature of 70 ℃ to obtain an HD/KH570/SiO 2 solution after the reaction, wherein the concentration of the solution A is 0.01g/L, adding the silane coupling agent KH-570 with the concentration of 7wt% of each 6ml into the beaker of 30 mL deionized water, carrying out ultrasonic full hydrolysis to obtain the solution B, and carrying out ultrasonic full hydrolysis to obtain the solution B, wherein the concentration of the HDTMS is 3wt%, and the volume ratio of the solution A to the solution B to the HDTMS is 10:10:1; (3) Spraying the HD/KH570/SiO 2 solution on the surface of the pre-cured carbon nano-tube film obtained in the step (1), and sending the sprayed solution into an oven for curing to obtain the conductive high-wear-resistance carbon nano-tube film after curing.
2. 2. The method for preparing the conductive high-wear-resistance carbon nanotube film according to claim 1, wherein the epoxy resin curing agent is T-31, and the mass ratio of the epoxy resin to the curing agent is 4:1.
3. 3. The method for preparing a conductive high abrasion resistant carbon nanotube film according to claim 1, wherein the epoxy resin viscous solution is used in an amount of 1-2ml of epoxy resin viscous solution coated on each 5 x 5cm carbon nanotube film.
4. 4. The method of claim 1, wherein the relative amount of the HD/KH570/SiO 2 solution used for the pre-cured carbon nanotube film is 3mlHD/KH570/SiO 2 solution coated on the surface of each 5cm carbon nanotube film.
5. 5. The method of claim 1, wherein the curing temperature in the step (3) is 80 ℃ and the curing time is 6h.

Description

Preparation method of conductive high-wear-resistance carbon nanotube film Technical Field The invention relates to the field of superhydrophobic, in particular to a preparation method of a mechanically stable superhydrophobic carbon nanotube film with a conductive and hydrophobic effect. Background Materials with novel properties such as lightweight, waterproof self-cleaning, etc. have been continuously developed in order to accommodate rapidly developing flexible and wearable electronic products or devices, and electronic devices such as mobile phones and telecommunication cabinets have been widely used outdoors. Therefore, there is a need to improve the protection of devices from electrochemical corrosion or electrical shorting caused by moisture (water vapor) and liquid water. The construction of superhydrophobic coatings on carbon nanotube films is an important approach to obtaining waterproof surfaces. However, the coating has weaker adhesive force with the matrix, so that the superhydrophobicity of the coating is very easy to lose under the action of mechanical load. CN202310731885.1 is a preparation method of a durable super-hydrophobic carbon nanotube film composite material, a PDMS prefabricated layer is inserted between a carbon nanotube film substrate and a super-hydrophobic coating, and the super-hydrophobic coating based on PDMS and SiO 2 nano particles is prepared. In the heat curing crosslinking reaction, the SiO 2 nano particles wrapped by PDMS are partially embedded into the incompletely cured PDMS prefabricated layer, the abrasion resistance of the PDMS prefabricated layer is guaranteed only for about 30 times at most, the surface integrity of the PDMS prefabricated layer is destroyed for more than 30 times, and the mechanical stability of the hydrophobic effect of the surface is difficult to guarantee. The invention provides a preparation method of a composite material for establishing excellent mechanical stability and simultaneously maintaining conductivity of a carbon nano tube film, which improves the mechanical bonding strength of a super-hydrophobic layer and the carbon nano tube film by inserting an epoxy resin layer between the carbon nano tube film treated by air plasma and a coating, and realizes surface super-hydrophobicity by spraying an HD/KH570/SiO 2 solution on the surface. The sprayed coating is embedded into the epoxy resin layer, and the conductive and wear-resistant carbon nanotube film can be formed after complete solidification, so that the carbon nanotube film prepared by the method maintains the conductivity of the original film, increases the hydrophobicity and the friction resistance of the carbon nanotube film, and widens the application field of the carbon nanotube film. Disclosure of Invention The invention aims to expand the requirements of the carbon nano tube film in the waterproof field, and improve the mechanical stability of the surface hydrophobic effect of the carbon nano tube film under the condition of keeping the excellent conductivity of the carbon nano tube film. The invention prepares a conductive durable super-hydrophobic carbon nano tube film material, which comprises the following steps: The method comprises the steps of firstly, performing plasma cleaning pretreatment on a carbon nano tube film base; And secondly, dissolving epoxy resin and a curing agent thereof in n-hexane according to a mass ratio of 4:1, and performing ultrasonic treatment to form a viscous solution. The epoxy resin is selected as E-51 model, and the curing agent is selected as T-31. Step three, weighing nano SiO 2 particles, dissolving in a beaker filled with absolute ethyl alcohol, and stirring for 30min by ultrasonic to obtain solution A, wherein the concentration of the solution A is 0.01g/L. And fourthly, adding 1-9wt% of silane coupling agent KH-570 into a beaker of deionized water, and stirring for 30min by ultrasonic waves to fully hydrolyze the silane coupling agent KH-570 to obtain solution B. And fifthly, sequentially adding the solution A and the solution B, HDTMS into a flask, then placing the flask in a magnetic stirring constant temperature bath, wherein the temperature is 70 ℃, the rotating speed is 800rpm, and reacting for 4 hours to obtain a hydrophobic HD/KH570/SiO 2 solution, which is named as a C solution. And step six, coating the viscous solution formed by the epoxy resin in the step two on the carbon nano tube film for pre-curing, and adjusting the pre-curing temperature to 80 ℃ and the pre-curing time to 10-30 min. Further preferable pre-curing time is 10-20 min. And seventhly, taking out the pre-cured carbon nanotube film, spraying the solution C on the carbon nanotube film containing the epoxy resin layer, sending the carbon nanotube film into an oven for curing at 80 ℃ for 6 hours, and obtaining the conductive wear-resistant super-hydrophobic carbon nanotube film after curing. Further, adding 1-9wt% of silane coupling agent KH-570 per 6mL of so