High-wear-resistance high-impact-resistance polyamide-6-based nano composite material and preparation method thereof

A nano-composite material, high impact resistance technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of reduced mechanical properties and friction and wear properties, poor low temperature impact toughness, high dry friction coefficient, etc., to improve wear resistance Durability, good weather resistance, guarantee the effect of mechanical properties

Inactive Publication Date: 2016-05-11
HUNAN CITY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyamide 6 has the characteristics of high mechanical strength, high melting point, wear resistance, oil and general solvent resistance, and excellent heat resistance. However, as a friction material, PA6 has high dry friction coefficient, poor low temperature impact toughness, poor dimensional stability, and easy combustion. Disadvantages, when faced with a harsh environment, it needs to be modified
[0003] In recent years, the addition of fibers and ordinary inorganic particles to improve the wear resistance and mechanical properties of PA6 at home and abroad often increases the friction coefficient; however, the addition of solid lubricants can reduce the friction coefficient, but may increase the wear rate and reduce the friction coefficient. Improve its mechanical properties; add flame retardant, antistatic agent to prepare flame retardant and antistatic composite materials, while the mechanical properties and friction and wear properties are reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh polyamide 6 resin in parts by weight: 63.2 parts, hyperdispersant modified nano-titanium dioxide: 3 parts, polytetrafluoroethylene: 7.5 parts, ultra-high molecular weight polyethylene 7.5 parts, POE-g-MAH: 3.5 parts; Decabromodiphenyl ether: 10 parts, antimony trioxide: 3.5 parts, ethoxylated alkylamine: 1.3 parts, antioxidant 1010: 0.5 parts, put into high-speed mixer, mix at 300-600 rpm After 0.5 hour, after mixing evenly, kneading, extruding and granulating on a twin-screw extruder, the temperature of the twin-screw extruder is controlled at 190-250°C. Water-cooled and cut into pellets with a specification of Φ2.5×4 by a pelletizer, and dried at 80-100°C for 3-8 hours.

Embodiment 2

[0028] Weigh polyamide 6 resin in parts by weight: 62.8 parts, hyperdispersant modified nano-titanium dioxide: 3 parts, polytetrafluoroethylene: 7.5 parts, molybdenum disulfide 7.5 parts; HDPE-g-MAH: 3.5 parts, decabromo Diphenyl ether: 10 parts, antimony trioxide: 3.5 parts, ethoxylated alkylamine: 1.5 parts, antioxidant 1010: 0.5 parts, surface modifier: 0.2 parts, put into a high-speed mixer, with 300 Mix at ~600 r / min for 0.5 hour, mix evenly, and then knead, extrude, and granulate on a twin-screw extruder. The temperature of the twin-screw extruder is controlled at 190-250°C. Water-cooled and cut into pellets with a specification of Φ2.5×4 by a pelletizer, and dried at 80-100°C for 3-8 hours.

Embodiment 3

[0030] Weigh polyamide 6 resin in parts by weight: 62.8 parts, hyperdispersant modified nano-titanium dioxide: 3 parts, polytetrafluoroethylene: 5 parts, ultra-high molecular weight polyethylene 5 parts, molybdenum disulfide 5 parts; HDPE-g -MAH: 3.5 parts, decabromodiphenyl ether: 10 parts, antimony trioxide: 3.5 parts, ethoxylated alkylamine: 1.5 parts, antioxidant 1010: 0.5 parts, surface modifier: 0.2 parts, Put it into a high-speed mixer, mix at 300-600 rpm for 0.5 hours, mix evenly, and then knead and extrude on a twin-screw extruder to granulate. The temperature of the twin-screw extruder is controlled at 190-250°C. Water-cooled and cut into pellets with a specification of Φ2.5×4 by a pelletizer, and dried at 80-100°C for 3-8 hours.

[0031] The friction material prepared according to Example 1, Example 2 and Example 3 has the following properties:

[0032] Test items Example 1 Example 2 Example 3 Tensile strength MPa 63.7 60.8 61.9 Impact s...

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Abstract

The invention discloses a high-wear-resistance high-impact-resistance polyamide-6-based nano composite material and a preparation method thereof. The friction material comprises the following components in parts by weight: 55-75 parts of polyamide 6, 3-5 parts of modified nano titanium dioxide, 10-15 parts of composite solid lubricant, 3-8 parts of compatibilizer, 10-20 parts of flame retardant, 0.5-2 parts of antistatic agent, 0.05-0.5 part of antiaging agent and 0-1 part of surface modifier. The preparation method comprises the following steps: uniformly mixing all the materials according to parts by mass, and carrying out a fusion process to obtain the high-wear-resistance high-impact-resistance polyamide-6-based nano composite material. The friction material has the advantages of simple manufacturing technique, high wear resistance, high impact resistance, flame retardancy, static resistance, high/low temperature resistance, corrosion resistance, aging resistance, low cost and the like, overcomes the defect that the enhancement of a certain property of the material influences other physical property indexes in the prior art, and implements the high properties of the material.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and specifically relates to a polyamide 6-based nanocomposite with simple manufacturing process, high wear resistance, high impact resistance, flame retardancy, antistatic, high and low temperature resistance, corrosion resistance, aging resistance and low cost. Materials and their preparation methods. Background technique [0002] Polyamide 6 has the characteristics of high mechanical strength, high melting point, wear resistance, oil and general solvent resistance, and excellent heat resistance. However, as a friction material, PA6 has high dry friction coefficient, poor low temperature impact toughness, poor dimensional stability, and easy combustion. Disadvantages, when faced with a relatively harsh environment, it needs to be modified. [0003] In recent years, the addition of fibers and ordinary inorganic particles to improve the wear resistance and mechanical properties of PA6 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L27/18C08L23/06C08L51/06C08K13/06C08K9/04C08K3/22C08K5/06C08K3/30C09K3/14
CPCC08L77/02C08K2201/011C08K2201/017C08L2201/02C08L2201/04C08L2201/08C08L2205/03C08L2205/035C08L2207/068C09K3/1409C08L27/18C08L23/06C08L51/06C08K13/06C08K9/08C08K2003/2241C08K5/06C08K3/2279
Inventor 游一兰李笃信司高杰
Owner HUNAN CITY UNIV
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