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High-abrasion-resistance silicon nitride/nylon6 composite nano-material and preparation method thereof

A technology of nanocomposite materials and silicon nitride, which is applied in the field of polymers, can solve problems affecting the adhesion between wear-resistant modifiers and nylon 6 substrates, the mechanical properties of composite materials, and the high viscosity and density of composite materials. Low density, excellent mechanical properties, and the effect of improving adhesion

Active Publication Date: 2014-05-07
滁州格美特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used materials for wear-resistant modification of nylon 6 mainly include graphite, molybdenum disulfide and polytetrafluoroethylene, but the addition of these three materials is generally relatively large, which will bring some defects to the nylon 6 material: one will cause The viscosity and density of the composite material are relatively high; the second is that it will affect the adhesion between the wear-resistant modifier and the nylon 6 matrix; the third is that it also has a significant impact on the mechanical properties of the composite material, which is not conducive to its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Surface treatment of nano-silicon nitride: Add nano-silicon nitride to a mixed solution composed of ammonia water and tetraethyl orthosilicate at a mass ratio of 2:1, and react at 60°C for 6 hours to obtain a mixed solution; Add dropwise the coupling agent aminopropyltriethoxysilane accounting for 0.5% of the mass of nano-silicon nitride to the aforementioned mixed solution, react at 70°C for 2 hours, rinse repeatedly with deionized water after centrifugation, and finally dry to obtain positive Nano-silicon nitride treated with ethyl silicate and coupling agent composite surface;

[0028] (2) Drying treatment of nylon 6: dry nylon 6 at 90°C for 6 hours;

[0029] (3) Preparation of silicon nitride / nylon 6 nanocomposite material: 3 parts of nano-silicon nitride after (1) surface treatment, 97 parts of nylon 6 after (2) drying treatment, 0.2 parts of antioxidant 1098, 0.3 parts Pour antioxidant 168 and 0.5 parts of lubricant silicone powder GM-100 into a high-speed mi...

Embodiment 2

[0033] (1) Surface treatment of nano-silicon nitride: Add nano-silicon nitride to a mixed solution composed of ammonia water and tetraethyl orthosilicate at a mass ratio of 2:1, and react at 50°C for 8 hours to obtain a mixed solution; then drop Add the coupling agent aminopropyltriethoxysilane accounting for 1% of the mass of nano-silicon nitride, react at 80°C for 2 hours, wash with deionized water repeatedly after centrifugation, and finally dry to obtain ethyl orthosilicate and Nano-silicon nitride treated with coupling agent composite surface;

[0034] (2) Drying treatment of nylon 6: dry nylon 6 at 80°C for 6 hours;

[0035] (3) Preparation of silicon nitride / nylon 6 nanocomposites: 1 part of nano silicon nitride after (1) surface treatment, 99 parts of nylon 6 after (2) drying treatment, 0.2 parts of antioxidant 1098, 0.3 parts Pour antioxidant 168 and 0.5 parts of lubricant silicone powder GM-100 into a high-speed mixer, stir at a high speed, mix until uniform, add to...

Embodiment 3

[0039] (1) Surface treatment of nano-silicon nitride: Add nano-silicon nitride to a mixed solution composed of ammonia water and tetraethyl orthosilicate at a mass ratio of 2:1, and react at 80°C for 5 hours to obtain a mixed solution; then drop Add 1.5% of the coupling agent aminopropyltriethoxysilane, which accounts for 1.5% of the mass of nano-silicon nitride, react at 70 ° C for 5 hours, wash repeatedly with deionized water after centrifugation, and finally dry to obtain ethyl orthosilicate and Nano-silicon nitride treated with coupling agent composite surface;

[0040] (2) Drying treatment of nylon 6: dry nylon 6 at 100°C for 2 hours;

[0041] (3) Preparation of silicon nitride / nylon 6 nanocomposites: 5 parts of nano-silicon nitride after (1) surface treatment, 95 parts of nylon 6 after (2) drying treatment, 0.2 parts of antioxidant 1098, 0.3 parts Pour antioxidant 168 and 0.5 parts of lubricant silicone powder GM-100 into a high-speed mixer, stir at a high speed, mix un...

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PUM

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Abstract

The invention relates to a high-abrasion-resistance silicon nitride / nylon6 composite nano-material and a preparation method thereof. The nitride / nylon6 composite nano-material is prepared from the following raw materials in parts by weight: 95-99 parts of nylon 6, 1-5 parts of surface treated nano-silicon nitride, 0.5-3 parts of lubricant and 0.1-1 part of antioxidant by steps of stirring, mixing, melting, extruding and granulating by a twin-screw extruder. According to the method, the nano-silicon nitride is subjected to composite surface treatment by using ethyl orthosilicate and coupler, so that the dispersibility of the nano-silicon nitride which serves as a wear-resistant agent in matrix resin can be improved, the cohesiveness of the wear-resistant agent and the nylon 6 can be improved, the wear-resistance of the high-abrasion-resistance silicon nitride / nylon6 composite nano-material can be remarkably improved, and the excellent mechanical performance can be maintained.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a highly wear-resistant silicon nitride / nylon 6 nanocomposite material and a preparation method thereof. [0002] Background technique [0003] With the development of technology, nylon 6 (PA6) is more and more widely used in automobiles. PA6 has good comprehensive performance, low density, easy molding, and large degree of design freedom; heat insulation, and in terms of mold and assembly costs There are also clear advantages. In addition, PA6 not only has high tensile strength and excellent impact performance, but also has high thermal deformation temperature, heat resistance, low friction coefficient, wear resistance, self-lubrication, oil resistance and chemical resistance. Therefore, in order to improve the performance and grade of PA6 materials and meet the needs of final components and customers, glass fiber or other materials are commonly used to fill and enhance the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K9/06C08K3/34
CPCB29C48/92B29C2948/9258B29C2948/92704C08K2201/011C08L77/02C08L83/04C08K9/06C08K3/34
Inventor 杨桂生苏荣锦吕励耘
Owner 滁州格美特科技有限公司