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Heat-conductive high-molecular-weight nylon powder for 3D printing and preparation method thereof

A high-molecular-weight, nylon powder technology, applied in the field of high-molecular-weight nylon powder and its preparation, can solve the problems of poor dimensional stability and heat resistance, and improve mechanical properties, thermal stability, and interfacial interaction force Strong, uniform particle size distribution effect

Active Publication Date: 2014-08-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Pure nylon material powder material, the dimensional stability and heat resistance of the products prepared by 3D printing process are not very good

Method used

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  • Heat-conductive high-molecular-weight nylon powder for 3D printing and preparation method thereof
  • Heat-conductive high-molecular-weight nylon powder for 3D printing and preparation method thereof
  • Heat-conductive high-molecular-weight nylon powder for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Based on the weight part of caprolactam monomer, add 100 parts by weight of caprolactam monomer and 1 part by weight of flake graphite with a particle size of 5 microns into the container, and vacuumize at a temperature of 90 ° C. Dehydration, when the pressure of the system shown on the vacuum gauge is <400Pa, remove the vacuum, add 0.005 parts by weight of sodium hydroxide and 0.1 parts by weight of antioxidant 1010, continue vacuuming, and raise the temperature to 130 ° C, when the vacuum gauge shows When the pressure of the system is less than 400Pa, keep it warm for 10 minutes, add 0.01 parts by weight of p-phenylene 2,4-diisocyanate, stir until the mixture is uniform, and pour it into a preheated to 160°C with a particle size of 1 micron. In a sand container, keep warm and stir vigorously for 10 minutes, then cool down naturally to 25°C, and then use a suction air separator to separate and obtain heat-conducting nylon composite powder with a viscosity-average molec...

Embodiment 2

[0068] Based on the weight part of caprolactam monomer, add 100 parts by weight of caprolactam monomer and 10 parts by weight of expanded graphite with a particle size of 0.5 microns into the container, and vacuumize at a temperature of 100 ° C. Dehydration, when the pressure of the system shown by the vacuum gauge is <400Pa, remove the vacuum, add 0.007 parts by weight of potassium hydroxide and 0.5 parts by weight of antioxidant 1096, continue vacuuming, and raise the temperature to 135 ° C, when the pressure shown by the vacuum gauge When the pressure of the system is less than 400Pa, heat preservation reaction for 10 minutes, add 0.15 parts by weight of Lechner glue, stir until evenly mixed, pour iron, nickel, In the container of the cobalt magnetic material powder, heat preservation and vigorous stirring for 10 minutes, then naturally cool down to 25°C, heat preservation and vigorous stirring for 10 minutes, naturally cool to 25°C, and then use a magnetic separation separa...

Embodiment 3

[0070] Based on the weight part of dedecalactam monomer, 100 parts by weight of dedecalactam monomer and 50 parts by weight of aphanitic graphite with a particle size of 10 microns are added to the container, and the vacuum is drawn at a temperature of 120 ° C. , carry out dehydration in a vacuum state, when the pressure of the system shown by the vacuum gauge is <400Pa, remove the vacuum, add 1 weight part of magnesium hydroxide and 1 weight part of antioxidant 168, continue vacuuming, and raise the temperature to 140°C , when the pressure of the system shown by the vacuum gauge is <400Pa, heat the reaction for 20 minutes, add 2 parts by weight of hexamethylene diisocyanate, stir until the mixture is uniform, and pour it into a container with a particle size of 20 microns that has been preheated to 180°C In the machine-made sand container, keep warm and stir vigorously for 20 minutes, then naturally cool down to 25°C, and then use a circulating wind separator to obtain thermal...

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Abstract

The invention provides a heat-conductive high-molecular-weight nylon powder composition which is characterized in that the powder composition is prepared through a polymerization reaction from raw materials comprising, by weight, 100 parts of lactam monomer, 1-50 parts of graphite, 0.005-1 part of an alkaline catalyst, 0.01-2 parts of an activator and 0.1-1 part of an anti-oxidant agent, wherein the lactam monomer is selected from one or more of caprolactam, decalactam and dodecalactam. The invention also provides a preparation method of the heat-conductive nylon powder composition and an application thereof. The molecular weight of the heat-conductive nylon powder can be adjusted in a range from 50000 to 1200000 and the particle size of the heat-conductive nylon powder can be controlled in a range from 20 to 100 microns with a uniform distribution. The powder can be used for 3D printing with stability of a product size being good and a thermal conductivity performance being high and can satisfy requirement of heat-conductive composite materials having high performance and complex structure in the technical fields of heat energy utilization, chemical heat exchange and the like.

Description

technical field [0001] The invention relates to a heat-conducting high-molecular-weight nylon powder and a preparation method thereof, in particular to a high-molecular-weight nylon powder that can be used for 3D printing and a preparation method thereof. Background technique [0002] 3D printing technology, also known as laminated manufacturing technology, is an emerging technology in the field of rapid prototyping. Techniques for constructing objects. The basic principle is additive manufacturing, the technique of adding material layer by layer to generate a three-dimensional solid. At present, 3D printing technology is mainly used in product prototyping, mold manufacturing, art creation, jewelry making and other fields, replacing these traditional fine processing techniques. In addition, 3D printing technology is gradually applied in fields such as medicine, bioengineering, architecture, clothing, aviation, etc., opening up a broad space for innovation. [0003] 3D pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/14C08G69/16C08L77/02B29C67/00
Inventor 马永梅郑鲲张京楠曹新宇王佛松林学春孙文华徐坚董金勇李春成符文鑫
Owner INST OF CHEM CHINESE ACAD OF SCI
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