A kind of preparation method of phase change microcapsule/uhmwpe wear-resistant material

A technology of phase-change microcapsules and wear-resistant materials, which is applied in the field of composite wear-resistant materials, can solve problems such as high friction coefficient and low wear rate, and achieve the effects of improving wear resistance, maintaining continuity, and reducing friction coefficient

Inactive Publication Date: 2016-03-16
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent No. 201310312711.8 discloses a resin-based friction material mixed with phase-change alloy powder to achieve the purpose of suppressing thermal recession in the range of 100°C to 350°C, but the patent does not involve the friction performance test of materials below 100°C. And the resin-based friction material with low wear rate and high friction coefficient is obtained

Method used

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  • A kind of preparation method of phase change microcapsule/uhmwpe wear-resistant material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of phase change microcapsule / UHMWPE wear-resistant material, comprising the following steps:

[0025] Step 1, the preparation of microcapsule powder

[0026] (1) Mix formaldehyde solution with a molar ratio of 3.6:1 and melamine, add an appropriate amount of distilled water to form a mixed solution, and stir the mixed solution in a constant temperature water bath at 70°C until the system is transparent, wherein the mass percent concentration of the formaldehyde solution is 37 %, then add a NaOH solution with a mass percentage concentration of 10% to adjust the pH of the system to 10, and the temperature of the water bath is lowered to 40°C and continued to stir for 30 minutes to obtain a formaldehyde-melamine prepolymer;

[0027] (2) According to the weight ratio of formaldehyde-melamine prepolymer and paraffin prepared in step (1) to 1.5:1, weigh the paraffin with a phase transition temperature of 48~50°C, and add 37.6% of the weight of the weighed...

Embodiment 2

[0035] Prepare microcapsule powder according to the preparation method of step 1 in Example 1, and then weigh 80% of the UHMWPE powder and 20% of the microcapsule powder prepared in step 1 according to the weight percentage, and then carry out step 2 to step 6 in Example 1 steps, the test results are as follows figure 1 shown.

Embodiment 3

[0037] Prepare microcapsule powder according to the preparation method of step 1 in Example 1, and then weigh 70% of the UHMWPE powder and 30% of the microcapsule powder prepared in step 1 according to the weight percentage, and carry out step 2 to step 6 in Example 1 in sequence steps, the test results are as follows figure 1 shown.

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Abstract

The invention discloses a phase-change microcapsule / UHMWPE (Ultrahigh Molecular Weight Polyethylene) wear-resistant material and a preparation method thereof. The wear-resistant material is prepared from the following raw materials in percentage by total weight: 10-30% of microcapsule powder and 70-90% of unmodified UHMWPE powder. The preparation method comprises the following steps: preparing the microcapsule powder, preparing a phase-change microcapsule / UHMWPE composite material, and performing hot press molding on the phase-change microcapsule / UHMWPE composite material. The phase-change material is wrapped by using paraffin by using a microcapsule method, then the paraffin in an indefinite state is in a stable solid state and is conductive to uniformly mixing with the UHMWPE powder in a dry state, and the parking of the composite material is prevented from being lost when the paraffin is heated in the pressing and sintering process; the composite material is prevented from property degradation as the paraffin leaks in a liquid state after frictional heat absorption and phase change; moreover in the friction process, a part of the microcapsule is broken, a paraffin substance is released so as to be filled to a friction interface, and then a lubrication function is improved.

Description

technical field [0001] The invention relates to the technical field of composite wear-resistant materials, in particular to a preparation method of phase-change microcapsules / UHMWPE wear-resistant materials. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) has many advantages such as high impact strength, strong wear resistance, low friction coefficient, and good biocompatibility. Combining with metal or ceramic joint heads constitutes the main artificial joint in clinical application; in the field of engineering applications, UHMWPE and its composite materials are increasingly used to replace steel to make sliding friction pairs such as bearings, gears, tracks and sliders Component. [0003] With the increasingly common use of ultra-high molecular weight polyethylene materials in the field of friction, people are limited by their own shortcomings while benefiting from its excellent performance. On the one hand, the surface hardness of UHMWPE...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K9/10C08K5/01B01J13/02
CPCB01J13/02C08G12/32C08K9/10C08L2207/068C08L23/06
Inventor 潘炳力李宁王利平杜三明孙乐民张永振
Owner HENAN UNIV OF SCI & TECH
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