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A kind of phase change particle modified polyamide wear-resistant material and its preparation method

A technology of phase change particles and wear-resistant materials, which is applied in the field of composite wear-resistant materials, can solve problems such as failure to meet requirements, and achieve the effects of improving tribological properties, dissipating frictional heat, and improving wear resistance

Active Publication Date: 2018-03-27
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these successfully developed materials are still unable to meet the requirements of some new and traditional special engineering technology fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] Step 1. Preparation of Phase Change Granular Material

[0024] a. Weigh flake graphite, add the weighed flake graphite to the mixed concentrated acid composed of concentrated sulfuric acid and concentrated nitric acid to react under the condition of constant stirring, control the temperature at 30-50°C, and stir for 60 min, then Washing with water until neutral, drying the washed product at 105°C for 12 hours to obtain a graphite intercalation compound, which is ready for use;

[0025] b, placing the graphite intercalation compound prepared in step a in a muffle furnace and calcining for 30s at a temperature of 850° C., taking out and pulverizing, passing through a 200-mesh sieve to obtain porous graphene powder for subsequent use;

[0026] c. Add solid paraffin wax accounting for 2.5 times its mass to the porous graphene powder prepared in step b, then mix the mixture for 30 min in a water bath at 80° C. with a stirring rate of 100 rpm and an ultrasonic power of 180 w ...

Embodiment 1

[0036] Adopt the technical scheme of 5% by weight of phase change particles, the specific preparation method is as follows:

[0037] Step 1. Preparation of Phase Change Particles

[0038] Add 15g of graphite flakes into a mixed solution of 45g of concentrated sulfuric acid (98%) and 5g of concentrated nitric acid (65%) under constant stirring, control the temperature at 50°C, stir and react for 60 minutes, wash the product until neutral, and dry at 105°C for 12h , to obtain a graphite intercalation compound; place the graphite intercalation compound in a muffle furnace at 850°C for 30s, take it out and cool it, then pulverize it, and pass through a 200-mesh sieve to obtain a porous graphene powder; in a water bath at 80°C, the stirring rate is 100rpm, Under the condition of ultrasonic power of 180w, after dispersing the mixture of porous graphene powder and solid paraffin wax accounting for 2.5 times its mass for 30 minutes, the porous graphene / paraffin wax phase change partic...

Embodiment 2

[0042] Adopt the technical scheme of phase change particle weight content 7.5%, the specific preparation method is as follows:

[0043] Step 1. Preparation of Phase Change Particles

[0044] Add 15g of flake graphite into the mixed solution of 45g of concentrated sulfuric acid (98%) and 5g of concentrated nitric acid (65%) under constant stirring,

[0045] Control the temperature at 50°C, stir and react for 60 minutes, wash the product to neutrality, and dry at 105°C for 12 hours to obtain a graphite intercalation compound; place the graphite intercalation compound in a muffle furnace at 850°C for 30 seconds, take it out and cool it, and then pulverize it. Pass through a 200-mesh sieve to obtain porous graphene powder; in a water bath at 80°C, with a stirring rate of 100rpm and an ultrasonic power of 180w, after dispersing the porous graphene powder and the solid paraffin mixture accounting for 2.5 times its mass for 30 minutes, obtain porous graphene / Paraffin phase change p...

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Abstract

The invention discloses a phase-change-particle modified polyamide wear-resistant material and a preparing method thereof. The phase-change-particle modified polyamide wear-resistant material is formed in the mode that reaction materials, a catalyst and an assist catalyst are catalyzed and polymerized, wherein the adding proportion of the reaction materials to the catalyst to the assist catalyst is 100 g:(0.2-0.35) g:(1.5-3.5) ml, the reaction materials comprise, by mass, 5%-10% of phase-change particle materials and 90%-95% of caprolactam, and phase-change-particle materials are porous graphene / hard paraffin phase-change materials. According to the phase-change-particle modified polyamide wear-resistant material and the preparing method thereof, the high-thermal conductivity and the high heat enthalpy of phase-change particles are used for dissipating friction heat, the tribology performance of the polyamide material is improved accordingly, particularly, the anti-wear performance of the polyamide material is greatly improved, the abrasion resistance under the low-speed and heavy-load condition is 1.3-2.7 times that of the prior art, and the abrasion resistance under the high-speed and light-load condition is 2.6-5.8 times that of the prior art; therefore prepared pieces with the wider application range are prepared with the polyamide composite material.

Description

technical field [0001] The invention relates to the technical field of composite wear-resistant materials, in particular to a phase-change particle / polyamide wear-resistant material and a preparation method thereof. Background technique [0002] Polymer self-lubricating materials are widely used due to their light weight and maintenance-free properties. In order to further improve the anti-friction and wear resistance of polymer materials, domestic and foreign scholars have carried out a lot of research. However, since polymer materials are very sensitive to temperature, the frictional heat generated during frictional motion can cause an increase in operating temperature, causing the polymer to change from a glassy state to a highly elastic state to a viscous flow state (melting of linear polymers) State) transformation, its modulus and hardness will be greatly reduced, thereby reducing its maximum allowable PV value and limiting its application range. [0003] In order to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/16C08L77/02C08L91/06C08K3/04
CPCC08G69/16C08L77/02C08L91/06C08K3/04
Inventor 潘炳力刘永辉陈君台玉萍王恒迪牛荣军逄显娟张永振
Owner HENAN UNIV OF SCI & TECH
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