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Copolymer nylon/graphene composite microsphere capable of being used for selective laser sintering and preparation method thereof

A graphene composite and laser sintering technology, applied in the field of material chemistry, can solve problems such as no reports of copolymerized nylon-graphene composite microspheres

Inactive Publication Date: 2021-08-10
HEZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there have been no reports of copolymerized nylon-graphene composite microspheres

Method used

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  • Copolymer nylon/graphene composite microsphere capable of being used for selective laser sintering and preparation method thereof
  • Copolymer nylon/graphene composite microsphere capable of being used for selective laser sintering and preparation method thereof
  • Copolymer nylon/graphene composite microsphere capable of being used for selective laser sintering and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 40 parts of polystyrene, 36 parts of caprolactam, 24 parts of enantholactam, 0.03 parts of aminated graphene and 0.018 parts of catalyst sodium hydroxide, add them into a three-necked flask, and protect them under nitrogen at 70-150 °C Dissolve under electrical stirring for 0.5-2.5 hours, so that the polystyrene is completely dissolved; then distill under reduced pressure to remove a small amount of water remaining in the system to obtain a mixed solution;

[0026] (2) Add 0.018 parts of activator toluene-2,4-diisocyanate to the mixed liquid prepared in step (1), shake it well, pour it into a preheated mold at 110-170°C immediately, react and solidify, get composite materials;

[0027] (3) Break the composite material obtained in step (2), extract and dissolve the polystyrene with tetrahydrofuran, and filter to obtain a black powder, which is a copolymerized nylon / graphene composite microsphere with a graphene content of about 0.05%.

Embodiment 2

[0029] (1) Weigh 25 parts of polystyrene, 65 parts of caprolactam, 10 parts of caprolactam, 0.3 parts of carboxylated graphene and 0.5 parts of catalyst sodium hydroxide, add them into a three-necked flask, and protect them under nitrogen at 70-150 °C Dissolve under electrical stirring for 0.5-2.5 hours, so that the polystyrene is completely dissolved; then distill under reduced pressure to remove a small amount of water remaining in the system to obtain a mixed solution;

[0030] (2) Add 0.5 parts of activator toluene-2,4-diisocyanate to the mixed solution prepared in step (1), shake it well, pour it into a preheated mold at 110-170°C immediately, react and solidify, get composite materials;

[0031] (3) Break the composite material obtained in step (2), extract and dissolve the polystyrene with tetrahydrofuran, and filter to obtain a black powder, which is a copolymerized nylon / graphene composite microsphere with a graphene content of about 0.4%.

Embodiment 3

[0033] (1) Weigh 15 parts of polystyrene, 80.75 parts of caprolactam, 4.25 parts of laurolactam, 0.85 parts of aminated graphene, and 0.85 parts of catalyst sodium hydroxide, and add them to a three-necked flask. Dissolve under protection and electric stirring for 0.5~2.5h, so that the polystyrene is completely dissolved; then distill under reduced pressure to remove the trace amount of water remaining in the system to obtain a mixed solution;

[0034] (2) Add 0.85 parts of activator toluene-2,4-diisocyanate to the mixed solution prepared in step (1), shake it well, pour it into a preheated mold at 110-170°C immediately, react and solidify, get composite materials;

[0035] (3) Break the composite material obtained in step (2), extract and dissolve the polystyrene with tetrahydrofuran, and filter to obtain a black powder, which is a copolymerized nylon / graphene composite microsphere with a graphene content of about 1%.

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Abstract

The invention belongs to the technical field of material chemistry, and particularly relates to a copolymer nylon / graphene composite microsphere capable of being used for selective laser sintering and a preparation method thereof. The particle size of the composite microsphere is 5-100 microns, and the content of graphene is 0.05-1 wt%. The microsphere preparation system is composed of a polymer, lactam A, lactam B, graphene, a catalyst and an activator. The composite microsphere can be used as a consumable of an SLS selective laser sintering technology, and the application range of the SLS technology in the field of high-performance new materials (such as aviation, automobiles and electronic instruments) is widened.

Description

technical field [0001] The invention belongs to the technical field of material chemistry and relates to a copolymerized nylon / graphene composite microsphere which can be used for selective laser sintering and a preparation method thereof. Background technique [0002] As an additive manufacturing technology (Additive Manufacturing, AM, commonly known as 3D printing), selective laser sintering (Selective Laser Sintering, SLS) has the advantages of no waste of sintered materials, low cost of parts and the ability to manufacture complex parts. One of the most active branches in the field of 3D printing technology. [0003] Among the few known polymer-based SLS molding materials with practical value, nylon 12 (PA12) is regarded as the most ideal polymer due to its low melt viscosity, wide molding temperature range, small water absorption and molding shrinkage. Object-based SLS molding material, but its price is higher. Nylon 6 (PA6) and its polymerized monomer caprolactam (CL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L25/06C08K9/04C08K3/04
CPCC08L77/02C08L25/06C08K9/04C08K3/042
Inventor 陈珍明覃丽妮韦师李鹏黄俊俊
Owner HEZHOU UNIV
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