Aluminum powder surface hydration processing method and application of aluminum powder in preparing Al@Ag nuclear shell composite particle conductive and electromagnetic shielding filler

A technology of hydration treatment and electromagnetic shielding, applied in coating and other directions, can solve the problems of complex process, high cost and large amount of silver, and achieve the effect of simple raw material composition, low cost and low silver content

Active Publication Date: 2014-09-17
KING STRONG MATERIAL ENG LTD
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for surface hydration treatment of aluminum powder and its application in the preparation of conductive and electromagnetic shielding fillers of AlAg core-shell composite particles, so as to solve the problem of the large amount of silver used in the existing preparation of AlAg core-shell composite particles. , high cost, or complicated process

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  • Aluminum powder surface hydration processing method and application of aluminum powder in preparing Al@Ag nuclear shell composite particle conductive and electromagnetic shielding filler

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no. 1 example

[0020] The first embodiment includes: Step 1. Add 40g of aluminum powder in 400mL of deionized water, stir, let it stand for 30 minutes, pour off the supernatant, wash repeatedly until the supernatant has no floating matter, suction filter, and vacuum dry for later use ;

[0021] Step 2. Take 400 mL of a mixed solution of water and ethanol with a volume ratio of 3:1 in a three-necked flask, and heat it in a temperature-controlled oil bath. After controlling the temperature to 72°C, add the above-mentioned aluminum powder and stir for 3 min ;

[0022] Step 3. Add 30 mL of γ-mercapto-propyltrimethoxysilane, stir until uniform, keep the solution temperature at 72°C, react for 4 hours, filter, and vacuum dry for later use;

[0023] Step 4. Prepare the reducing solution, take 22.5 g of glucose, 2 g of potassium sodium tartrate and 500 mL of deionized water, boil for 5 min, cool to room temperature for later use; take 200 mL of reducing solution, and then add 10 g of polyvinylpyrro...

no. 2 example

[0027] The second embodiment includes: Step 1. Add 40g of aluminum powder in 400mL of deionized water, stir, let it stand for 30 minutes, pour off the supernatant, wash repeatedly until the supernatant has no floating matter, filter it with suction, and dry it in vacuum for later use ;

[0028] Step 2. Take 400 mL of a mixed solution of water and ethanol with a volume ratio of 3:1 in a three-necked flask, and heat it in a temperature-controlled oil bath. After controlling the temperature to 74°C, add the above-mentioned aluminum powder and stir for 2 min ;

[0029] Step 3. Add 30 mL of γ-mercapto-propyltrimethoxysilane, stir until uniform, keep the solution temperature at 74°C, react for 4 hours, filter, and vacuum dry for later use;

[0030] Step 4. Prepare the reducing solution, take 22.5 g of glucose, 2 g of potassium sodium tartrate and 500 mL of deionized water, boil for 5 min, cool to room temperature for later use; take 200 mL of reducing solution, and then add 10 g of...

no. 3 example

[0034] The third embodiment includes: Step 1. Add 40g of aluminum powder in 400mL of deionized water, stir, let it stand for 30 minutes, pour off the supernatant, wash repeatedly until the supernatant has no floating matter, suction filter, and vacuum dry for later use ;

[0035] Step 2. Take 400 mL of a mixed solution of water and ethanol with a volume ratio of 3:1 in a three-necked flask, and heat it in a temperature-controlled oil bath. After controlling the temperature to 75°C, add the above-mentioned aluminum powder and stir for 2 min ;

[0036] Step 3. Add 30 mL of γ-mercapto-propyltrimethoxysilane, stir until uniform, keep the solution temperature at 75°C, react for 4 hours, filter, and vacuum dry for later use;

[0037]Step 4. Prepare the reducing solution, take 22.5 g of glucose, 2 g of potassium sodium tartrate and 500 mL of deionized water, boil for 5 min, cool to room temperature for later use; take 200 mL of reducing solution, and then add 10 g of polyvinylpyrrol...

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Abstract

The invention relates to an aluminum powder surface hydration processing method. The aluminum powder surface hydration processing method comprises the following steps that 1, the surface of aluminum powder is washed, filtered in a suction mode and dried; 2, the washed aluminum powder is placed into a solution with the volume ratio of water to ethyl alcohol being 3: 1 for hydroxylation processing; 3, a silane coupling agent is added, sulfhydrylation decoration is conducted on the aluminum powder, and filtering, washing and drying are conducted, so that the aluminum powder obtained after sulfhydrylation decoration is obtained. The invention further provides an application of the aluminum powder obtained according to the aluminum powder surface hydration processing method in preparing Al@Ag nuclear shell composite particle conductive and electromagnetic shielding filler. The aluminum powder serves as a raw material for preparing the conductive and electromagnetic shielding filler. The sulfydryl content of the surface of the processed aluminum powder is high and the processing method is simple and efficient; prepared Al@Ag nuclear shell composite particles have the advantages of being even and dense in silver shell layer, low in silver content, low in cost and the like, and have important application prospect in the fields of conductive and electromagnetic shielding composite materials and the like.

Description

technical field [0001] The invention relates to the field of conductive and electromagnetic shielding composite materials. Background technique [0002] The silver-coated core-shell composite particle functional filler can overcome the high density and high cost of traditional single-component silver, copper and nickel metal fillers, which are difficult to disperse evenly in the polymer matrix, which is easy to cause the electrical and mechanical properties of the composite material. Due to many problems such as poor environmental resistance, it is widely used in current high-performance conductive and electromagnetic protection composite materials. For AlAg core-shell composite particles, it has all the excellent properties of aluminum and silver at the same time. Aluminum is light, its density is only 2.72g / cm 3 , which is about one-third the density of copper. Its electrical conductivity and thermal conductivity are good, ranking fourth after silver, copper and gold. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02
Inventor 王一龙石涛赵素玲官建国王刚
Owner KING STRONG MATERIAL ENG LTD
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