A method of surface hydration treatment of aluminum powder and its application in the preparation of al@ag core-shell composite particle conductive and electromagnetic shielding filler

A technology of hydration treatment and electromagnetic shielding, which is applied in the direction of coating, etc., can solve the problems of large silver consumption, complicated process, and high cost, and achieve the effect of low silver content, simple raw material composition, and low cost

Active Publication Date: 2017-01-18
KING STRONG MATERIAL ENG LTD
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  • Abstract
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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 Al@Ag core-shell composite particle conductive and electromagnetic shielding fillers, to solve the problem of the existing preparation of Al@Ag core-shell composite particles There are problems such as large amount of silver consumption, high cost, or complicated process

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  • A method of surface hydration treatment of aluminum powder and its application in the preparation of al@ag core-shell composite particle conductive and electromagnetic shielding filler

Examples

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no. 1 example

[0020] The first embodiment includes: Step 1. Add 40 g of aluminum powder to 400 mL of deionized water, stir, and let stand for 30 minutes. Pour off the supernatant and repeatedly wash until the supernatant is free of floating substances. Filter by suction and vacuum dry for later use. ;

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

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

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

no. 2 example

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

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

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

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

no. 3 example

[0034] The third embodiment includes: Step 1. Add 40 g of aluminum powder to 400 mL of deionized water, stir, leave for 30 minutes, pour out the supernatant, and repeatedly wash until the supernatant is free of floating substances, filter with suction, and vacuum dry for later use ;

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

[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, vacuum dry for later use;

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

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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 surface-coated silver core-shell composite particle functional filler can overcome the high density and high cost of traditional single-component silver, copper, nickel and other metal fillers. It is difficult to uniformly disperse in the polymer matrix, and it is easy to cause the electrical and mechanical properties of composite materials. It has many problems such as poor environmental resistance, so it is widely used in current high-performance conductive and electromagnetic protective composite materials. For Al@Ag core-shell composite particles, it has both the excellent properties of aluminum and silver. Aluminum is lighter and its density is only 2.72g / cm 3 , About one third of the density of copper. It has good electrical and thermal conductivity, second only to silver, copper and gold, ranking fourth. In addition,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02
Inventor 王刚赵立英官余意吴清军廖应峰
Owner KING STRONG MATERIAL ENG LTD
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