Method for preparing carbon nanotube static conductive coating on surface of EVA thin film

A technology of carbon nanotubes and electrostatic coatings, applied in the direction of conductive coatings, coatings, etc., can solve the problems of difficult control, destruction of carbon tube dispersion state, high cost, etc., achieve lower drying temperature, shorter drying time, and easy operation Effect

Inactive Publication Date: 2010-07-21
ANHUI GOLDSUN NANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical mixing is that carbon nanotubes and EVA substrates are blended together through ultrasonic oscillation, mechanical stirring, adding surfactants, etc., and then melted at high temperature and drawn into a film. However, many studies have shown that first, physical mixing cannot achieve Ideal dispersion effect. Second, the dispersion of carbon nanotubes in the EVA substrate in physical mixing is also a static weak equilibrium. Once the temperature of the material rises and the thermal movement of molecules intensifies, the dispersed state of carbon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1:

[0014] 1) Stir 4g of carbon nanotubes, 1.5g of polyethylene glycol dispersant, 3g of PVP binder and 200ml of ethanol for 3-4 hours at room temperature to form a stable ethanolic carbon nanotube suspension.

[0015] 2) The ethanol suspension in step 1) is subjected to high-speed ball milling for 4-5 hours. A planetary ball mill is selected, and the rotation frequency of the ball mill is 30HZ to form an ethanol dispersion.

[0016] 3) The ethanol dispersion in step 2) was sonicated at 25°C for 30min, diluted 4 times, and sprayed directly on the surface of the EVA film, dried at 50°C, to obtain an EVA electrostatic conductive coating. Get resistance 10 7 -10 8 ohm.

Example Embodiment

[0017] Example 2:

[0018] 1) Stir 4g carbon nanotubes, 0.5g polyethylene glycol+0.5g serine dispersant, 3g PVP binder and 200ml 80vt% ethanol solution at room temperature at high speed for 3-4 hours to form a stable ethanolic carbon nanotube suspension.

[0019] 2) The ethanol suspension in step 1) is subjected to high-speed ball milling for 4-5 hours. A planetary ball mill is selected, and the rotation frequency of the ball mill is 30HZ to form an ethanol dispersion.

[0020] 3) The ethanol dispersion in step 2) was sonicated at 25°C for 30min, diluted 4 times, and sprayed directly on the surface of the EVA film, dried at 40°C to obtain an EVA electrostatic conductive coating. Use the surface resistance meter. Get resistance 10 7 -10 8 ohm.

Example Embodiment

[0021] Example 3:

[0022] 1) Stir 4g of carbon nanotubes, 1g of anionic polyacrylamide dispersant, 3g of PVP binder and 200ml of ethanol for 3-4 hours at room temperature to form a stable ethanolic carbon nanotube suspension.

[0023] 2) The ethanol suspension in step 1) is subjected to high-speed ball milling for 4-5 hours. A planetary ball mill is selected, and the rotation frequency of the ball mill is 30HZ to form an ethanol dispersion.

[0024] 3) The ethanol dispersion in step 2) was sonicated at about 30°C for 30min, diluted 4 times, and sprayed directly on the surface of the EVA film, dried at 50°C to obtain an EVA electrostatic conductive coating. Use the surface resistance meter. Get resistance 10 7 -10 8 ohm.

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Abstract

The invention relates to a method for preparing a carbon nanotube static conductive coating on the surface of an EVA thin film, which comprises the following steps that: first, a carbon nanotube is added into ethanol solvent with the concentration more than or equal to 60 vt percent to be stirred into suspension under the action of dispersant and binder, ball milled to prepare dispersion liquid; and the dispersion liquid is oscillated in ultrasonic wave at 20 to 40DEG C, diluted and sprayed onto the surface of the EVA thin film, dried and cured to prepare the carbon nanotube static conductive coating. The method has simple process and is convenient to operate, and the prepared coating does not fall off or cohere after being used for a long time.

Description

1. Technical field [0001] The invention relates to a method for processing a functional coating on the surface of a film, in particular to a method for preparing a carbon nanotube electrostatic conductive coating on the surface of an EVA film. 2. Technical Background [0002] EVA (ethylene-vinyl acetate copolymer) has the characteristics of good flexibility and rubber-like elasticity. Its film products have sealing, adhesiveness, softness, toughness and shrinkage, and are suitable for elastic packaging films. Heat shrinkable film, agricultural film, food packaging film, laminated film, etc., when EVA film is used in the packaging of electrical appliances and electronic products, the film is required to have certain antistatic properties. [0003] The traditional production process is to add a large amount of conductive agents such as carbon black to it, which is complicated in process and requires high equipment, which affects the performance of EVA film. As a new type of n...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08L23/08C08L31/04C09D5/24C09D7/12
Inventor 盛亮夏雨
Owner ANHUI GOLDSUN NANOTECH
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