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Preparation method of conductive adhesive

A technology of adhesives and organic solvents, applied in the field of preparation of conductive adhesives, can solve problems such as limitations in the application of conductive adhesives, and achieve the effects of facilitating electron transfer, high conductivity, and wide application prospects

Pending Publication Date: 2022-07-12
浙江元盛塑业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a conductive adhesive and its preparation method, which are used to solve the problem that the application field of the existing conductive adhesive is limited
The preparation method is simple, the conditions are mild and the environment will not be polluted

Method used

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  • Preparation method of conductive adhesive
  • Preparation method of conductive adhesive
  • Preparation method of conductive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 0

[0050] Example 0: Synthesis of HBPE@MA

[0051] In the present embodiment, there are many types of hyperbranched polyethylene. Exemplarily, hyperbranched polyethylene can be obtained by using a Pd-diimine catalyst to catalyze ethylene with a one-step "chain removal" copolymerization mechanism. The specific preparation process includes the following steps:

[0052] (1) Put a clean stirring magnet in a 250ml dry double-layer Schlenk bottle, plug it with a rubber stopper, evacuate for 3 minutes, pass ethylene for 3 minutes, repeat 3 times, and fill with ethylene, keep the temperature of the magnetic stirrer at a constant temperature Set at room temperature, and set the pressure of ethylene to 1.10 atmospheres (positive pressure protection). Bake the reaction flask at about 400 degrees for about 5 minutes with an electric heating gun, and then bake for a total of four times. (At the same time, vacuum and turn off the ethylene gas to ensure that the reaction flask is completely an...

Embodiment 1， Embodiment 2

[0062] Example 1, Example 2, Comparative Example 1

[0063] 1. Preparation of Samples

[0064] (1) Embodiment 1 provides a kind of method for connecting methyl acrylate auxiliary dispersion carbon tube with hyperbranched polyethylene, peeling graphene and the method for preparing composite conductive adhesive, and the steps are as follows:

[0065] Step 1: Weigh 320 mg of natural flake graphite with a purity of 99.5% produced by SigmaAldrich in the United States into a 100 ml cylindrical glass bottle.

[0066] Step 2: Weigh 160mg HBPE@MA into a small glass bottle, add 10ml of chloroform (produced by Sinopharm Chemical Co., Ltd., its purity is greater than or equal to 99.0%, no other special instructions, also use the chloroform) rinse, then pour into In a cylindrical glass bottle, repeat 2 times (ensure that all hyperbranched polymer is completely carried out).

[0067] Step 3: Take 50ml of chloroform with a pipette and pour it into a 100ml cylindrical glass bottle, and seal...

Embodiment 2

[0075] Step 1: Weigh 0.8g of acrylic pressure-sensitive adhesive (produced by Anzo Chemical Company) into a small glass bottle, the solid content is 30.5±1.0%, and the solvents are toluene and ethyl acetate. Add 15 ml of chloroform to dissolve completely. Put into a stirring magnet and stir for 12h.

[0076] Step 2: Use an adjustable scraper to manually coat the adhesive layer (the thickness of the adhesive layer after drying is 20 μm) on the release film. It was dried in a forced air oven for 12 h and the solvent was removed. Finally, it was transferred to a 25 μm thick PET film with a roller. A pure glue layer was prepared.

[0077] (3) Comparative Example 1 has the same preparation steps as Example 1, except that the mass fraction of the total filler is 1%.

[0078] 2. Characterization and Testing

[0079] Test the electrical conductivity of composite materials.

[0080] (1) High resistance measuring instrument

[0081] The test instrument is a surface resistance tes...

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Abstract

The invention discloses a method for preparing a conductive adhesive by taking multi-walled carbon nanotubes and graphene as mixed filler, which comprises the following steps: (1) mixing a certain amount of multi-walled carbon nanotubes or natural graphite and hyperbranched polyethylene-methyl acrylate in chloroform, carrying out ultrasonic treatment in an ultrasonic pool, and carrying out ultrasonic treatment for 2-3 hours; a multi-walled carbon nanotube solution and a graphene solution are obtained. And (2) carrying out centrifugation, vacuum filtration and ultrasonic operation on the solution to obtain a multiwalled carbon nanotube solution and a graphene solution with good dispersibility. And (3) dissolving the acrylate pressure-sensitive adhesive in chloroform by adopting a solution mixing method, then adding quantitative carbon tube solution, and uniformly mixing. And manually coating the adhesive layer on the release film by using an adjustable scraper, drying in a drying oven, and removing the solvent. And finally, transferring to a PET film, and measuring the surface resistance by using a high-resistance instrument. The method is simple, easy to operate, low in price and environmentally friendly.

Description

technical field [0001] The present application relates to the technical field of conductive adhesives, in particular to a preparation method of conductive adhesives. Background technique [0002] Acrylic solvent-based pressure-sensitive adhesives (hereinafter referred to as acrylate-based adhesives) are pressure-sensitive adhesives based on polymers or copolymers of acrylic acid and its derivatives. It is a kind of polymer adhesive with great potential, which is generally used for bonding materials of paper, fabric, glass, concrete, metal and plastic, etc. Outer decoration and luggage, etc. With the development of VLSI, we hope that the adhesive also has the function of conducting electricity. [0003] At present, conductive adhesives are generally composed of conductive fillers, polymer matrix and additives. Due to the high electrical conductivity of silver, silver powder is usually used as the conductive filler of the current conductive adhesive. However, because silve...

Claims

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Application Information

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IPC IPC(8): C09J133/00C09J9/02
CPCC09J133/00C09J9/02C08K2201/011C08K2201/001C08K3/041C08K3/042C08K9/08Y02P20/10
Inventor 徐立新王清王文林叶会见
Owner 浙江元盛塑业股份有限公司
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