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Nylon powder for selective laser sintering and preparation method thereof

A nylon powder and laser sintering technology, applied in the field of nylon powder for selective laser sintering and its preparation, can solve problems such as agglomeration, and achieve the effects of increasing the content of graphene powder, improving crystallinity, and enhancing graphene powder

Inactive Publication Date: 2020-04-21
HUNAN FARSOON HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to improve the problem of agglomeration of graphene powder additive materials in selective laser sintering technology and realize the dispersion and reinforcement of graphene powder, the invention provides a nylon powder for selective laser sintering and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037] (1) Add graphite powder to the mixed solution of sodium nitrate and sulfuric acid, stir under ice-water bath and add potassium permanganate, and heat to react. Then add hydrogen peroxide to neutralize, obtain graphene oxide powder after ultrasonication, suction filtration, washing and drying.

[0038] (2) Add 3 parts of graphene oxide powder, 45 parts of hexamethylenediamine, 45 parts of adipic acid, 0.5 parts of antioxidant and 50 parts of water into the polymerization kettle, and polymerize to obtain modified nylon pellets added with graphene.

[0039] (3) Add 10 parts of the above nylon pellets, 50 parts of ethanol, 0.05 parts of antioxidant, and 2 parts of graphene oxide into the reaction kettle, and prepare nylon powder through heating, stirring, cooling, suction filtration and drying.

[0040] (4) Mix nylon powder, antioxidant and flow aid to obtain nylon powder for selective laser sintering.

[0041] Example Part tensile strength (Mpa) Comparativ...

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Abstract

The invention provides a preparation method for nylon powder used for selective laser sintering. The preparation method comprises the following steps: adding graphene powder into a mixed solution of sodium nitrate and sulfuric acid, carrying out stirring in an ice-water bath, then adding potassium permanganate, carrying out a reaction under heating, then adding hydrogen peroxide for neutralization, and carrying out ultrasonic treatment, suction filtration, washing and drying so as to obtain graphene oxide powder; adding graphene oxide powder, diamine, binary acid, an antioxidant and water intoa polymerization kettle, and carrying out polymerizing so as to obtain graphene-added modified nylon granules; adding the nylon granules, alcohol, an antioxidant and graphene oxide into a reaction kettle, and carrying out heating, stirring, cooling, suction filtration and drying so as to obtain nylon powder; and mixing the nylon powder, an antioxidant and a flow auxiliary agent so as to obtain the nylon powder used for selective laser sintering. The nylon powder used for selective laser sintering has higher crystallinity and higher strength.

Description

technical field [0001] The invention relates to the field of selective laser sintering, in particular to a nylon powder for selective laser sintering and a preparation method thereof. Background technique [0002] Selective Laser Sintering (SLS) is a widely used rapid prototyping technology at present. The principle of the forming process is: firstly establish a computer 3D model of the target part, and then use layered software to process the 3D model. Slicing processing, to obtain the data information of each processing level, under the control of the computer, according to the slice level information, use the laser beam to scan and sinter the heat-fusible powder material layer by layer, and finally complete the processing and manufacturing of the target parts. [0003] Carbon is one of the most abundant elements on the earth. Graphite and diamonds are common in people's daily life. In recent decades, other allotropes of carbon have also been discovered, fullerenes, carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K13/02C08K3/04C08G69/28C08G69/26
CPCC08K13/02C08K3/042C08G69/28C08G69/26C08L77/06
Inventor 罗秋帆文杰斌岳云豪李俭徐文雅
Owner HUNAN FARSOON HIGH TECH CO LTD
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