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Preparation method of wear-resistant epoxy resin material

A technology of epoxy resin and composite materials, which is applied in the field of composite materials, can solve the problems of not testing the contribution of palygorskite clay's wear resistance, unsatisfactory wear resistance, and small thermal expansion coefficient, so as to improve the mechanical properties and processing properties , good machinability and wear resistance, and the effect of improving wear resistance

Active Publication Date: 2015-07-15
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN102504672A discloses an epoxy resin-based wear-resistant and anti-corrosion material, which is prepared with epoxy resin as the matrix, nano-palygorskite-alumina as the filler, and ultrasonic dispersion and mechanical blending technology. It has excellent Wear-resistant and anti-corrosion performance, and has good adhesion, therefore, it can be applied as a composite coating on the surface of mechanical parts to improve the wear-resistant and anti-corrosion performance of mechanical parts, thereby prolonging the service life of metal parts, but due to the use of Alumina is a synergist, and its preparation process is complicated. Although the wear resistance of the epoxy resin base is improved, the wear resistance may not be ideal.
Chinese patent CN102391473A discloses a preparation method of an acid anhydride cured epoxy resin / palygorskite nanocomposite material, comprising: grinding palygorskite into mineral powder; calcining and activating the palygorskite mineral powder; heating the epoxy resin Liquefaction, adding palygorskite, mixing and stirring; adding an acid anhydride curing agent, stirring the resulting mixture, vacuum degassing treatment, etc. to form a composite material, which can significantly improve the toughness of epoxy resin anhydride cured materials, significantly improve mechanical properties and thermal stability, This product is generally used for casting or encapsulating electronic and electrical products and heating and curing, but this invention does not test the contribution of palygorskite clay to the improvement of wear resistance of composite materials, and the wear resistance of composite materials
It has axial strength, high modulus, no creep, good fatigue resistance, specific heat and electrical conductivity between non-metal and metal, small thermal expansion coefficient, good corrosion resistance, low fiber density, X-ray Therefore, carbon fibers are widely used as fillers in the preparation of composite conductive materials, but there is currently no use of carbon fibers, palygorskite clay as compound additives, and epoxy resin as the matrix to prepare wear-resistant composite materials. public report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 5g of epoxy resin and add it into a 50mL round bottom flask, and place it in an oil bath at 50°C for liquefaction. Add diluent (xylene 0.25mL, n-butanol 0.50mL), stir for 10min; then add toughening agent butylene phthalate 0.049mL, stir for 10min; add 0.05g palygorskite clay, 0.45g carbon fiber, Stir for 40 minutes; vacuumize for 10 minutes; add 1.25g of T-31 curing agent, vacuumize for 2 minutes, pour into the mold, and cure in an oven at 60°C for 24 hours to obtain an epoxy resin composite material.

[0028] Wear resistance test: the average friction coefficient is 0.04018, the average wear amount is 1.23mg, the impact resistance is 68.70J / m, and the bending strength is 57.97Mpa.

Embodiment 2

[0030] Take 5g of epoxy resin and add it into a 50mL round bottom flask, and place it in an oil bath at 50°C for liquefaction. Add diluent (xylene 0.20mL, n-butanol 0.55mL), stir for 10min; then add toughening agent butylene phthalate 0.013mL, stir for 10min; add 0.15g palygorskite clay, 0.35g carbon fiber, Stir for 40 minutes; vacuum for 10 minutes; add 1.25g of T-31 curing agent, vacuum for 2 minutes, pour into the mold, and cure in an oven at 70°C for 12 hours to obtain an epoxy resin composite material.

[0031] Wear resistance test: the average friction coefficient is 0.05849, the average wear amount is 2.42mg, the impact resistance is 50.27J / m, and the bending strength is 58.06Mpa.

Embodiment 3

[0033] Take 5g of epoxy resin and add it into a 50mL round bottom flask, and place it in an oil bath at 50°C for liquefaction. Add diluent (xylene 0.21mL, n-butanol 0.54mL), stir for 10min; then add toughening agent butylene phthalate 0.035mL, stir for 10min; add 0.25g palygorskite clay, 0.25g carbon fiber, Stir for 40 minutes; vacuumize for 10 minutes; add 1.25g of T-31 curing agent, vacuumize for 2 minutes, pour into the mold, and cure in an oven at 60°C for 24 hours to obtain an epoxy resin composite material.

[0034] Wear resistance test: the average friction coefficient is 0.1054, the average wear amount is 3.57mg, the impact resistance is 48.56J / m, and the bending strength is 47.49Mpa.

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Abstract

The invention provides a preparation method of a wear-resistant epoxy resin composite material. The wear-resistant epoxy resin composite material is prepared by compounding epoxy resin used as a base and paligorskite clay and carbon fibers used as synergic additives, wherein the paligorskite has a special structure, so that the mechanical properties and processability of the material can be effectively enhanced; and the carbon fibers have favorable heat conductivity, so that the heat produced by friction can be transferred in time, and the surface temperature of the material can be reduced, thereby reducing the surface wear extent of the material. Thus, the paligorskite clay and the carbon fibers are used as synergic additives, thereby effectively improving the wear resistance of the epoxy resin and enhancing the shock resistance and processability of the base; and the addition of the paligorskite clay and the carbon fibers can reduce the cost of the epoxy resin material. The invention widens the application range of the epoxy resin.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a preparation method of a wear-resistant epoxy resin composite material, in particular to a preparation method of a wear-resistant epoxy resin composite material using palygorskite clay and carbon fiber as synergistic additives. Background technique [0002] Cured epoxy resins generally have excellent electrical insulation properties, corrosion resistance and bonding properties. Compared with thermosetting resins such as phenolic resins and unsaturated polyester resins, epoxy resins have the following excellent properties: good adhesion, small curing shrinkage, good electrical properties, good chemical stability, easy modification, and a wide range of uses. However, due to its high crosslinking density after curing, resulting in large internal stress, brittle quality, poor heat resistance, and high friction coefficient, the further application of epoxy resin is limited....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K13/04C08K7/06C08K3/34
Inventor 雷自强高淑玲张惠怡何海涛马德龙张哲马国富王荣方
Owner NORTHWEST NORMAL UNIVERSITY