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Antifriction anti-wear composite material and preparation method thereof

A composite material, anti-friction and anti-wear technology, applied in the field of polymer materials, can solve problems such as low friction coefficient, achieve the effects of excellent performance, reduce loss, and increase tribological performance

Active Publication Date: 2019-04-12
WUHAN RES INST OF MATERIALS PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above ideas, the object of the present invention is to provide a friction-reducing and anti-wear composite material for marine equipment and a preparation method thereof, wherein the anti-friction and anti-wear composite material is modified by adding electrolyte sodium polyacrylate to ultra-high molecular weight polyethylene. It solves the problem of adsorption of free ions and particles. It is a kind of anti-friction and anti-wear composite material with low friction coefficient and wear resistance that can be formed by hot pressing.

Method used

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  • Antifriction anti-wear composite material and preparation method thereof
  • Antifriction anti-wear composite material and preparation method thereof
  • Antifriction anti-wear composite material and preparation method thereof

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preparation example Construction

[0026] The invention provides an anti-friction and anti-wear composite material, which is formed by mixing ultra-high molecular weight polyethylene powder and sodium polyacrylate powder and then hot-pressed. The preparation method of the anti-friction and anti-wear composite material comprises the following steps:

[0027] Step 1. Select ultra-high molecular weight polyethylene powder, choose ultra-high molecular weight polyethylene powder as the base material, grind it fully, dry the ultra-high molecular weight polyethylene powder at 80°C for 2 hours, and remove the moisture of the ultra-high molecular weight polyethylene powder Finally, the powder that meets the requirements is obtained;

[0028] Step 2, matching electrolyte sodium polyacrylate powder;

[0029] Step 3, mechanical mixing, taking 1-5 parts of sodium polyacrylate powder and adding it to 100 parts of ultra-high molecular weight polyethylene powder, stirring and mixing evenly to form a mixed powder, drying the mi...

Embodiment 1

[0037] Example 1: Weigh the ultra-high molecular weight polyethylene (UHMWPE) powder with a total weight percentage of 97wt.%, grind it, and dry it in an oven at 70-100°C for 1-4h; weigh a total weight percentage of 3wt.% polyacrylic acid Sodium (PAANa), and then uniformly disperse the two by mechanical mixing, the mechanical mixing time is 45-60min; put the obtained UHMWPE / PAANa mixed powder in an oven at 70-100°C for 10-12h; take out the dried After mixing the powder, put it in the pre-cleaned mold, pre-press three times under the pressure of 30-40MPa, hold the pressure for 1-3min each time; unload the pressure after the pre-pressing process is completed; heat the mixed powder in the mold to 150- 200°C, keep warm for 1.5h; after the keep warm, gradually increase the pressure. When the temperature drops to 110°C, pressurize 10-20MPa; when the temperature drops to 100°C, pressurize 30-50MPa; when the temperature drops to 90°C, pressurize 70-90MPa; when the temperature drops to...

Embodiment 2

[0038]Embodiment 2: Weigh the ultra-high molecular weight polyethylene (UHMWPE) powder material that the total weight percentage is 95wt.%, grind, and dry in 70-100 ℃ oven for 1-4h; Weigh the polyacrylic acid that the weight percentage is 5wt.% Sodium (PAANa), and then uniformly disperse the two through mechanical mixing, and the mechanical mixing time is 45-60min; put the obtained UHMWPE / PAANa mixed powder in an oven at 70-100°C for 10-12h; take out the dried After mixing the powder, put it in the pre-cleaned mold, pre-press three times under the pressure of 30-40MPa, hold the pressure for 1-3min each time; unload the pressure after the pre-pressing process is completed; heat the mixed powder in the mold to 150- 200°C, keep warm for 1.5h; after the keep warm, gradually increase the pressure. When the temperature drops to 110°C, pressurize 10-20MPa; when the temperature drops to 100°C, pressurize 30-50MPa; when the temperature drops to 90°C, pressurize 70-90MPa; when the tempe...

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Abstract

The invention discloses an antifriction anti-wear composite material and a preparation method thereof. The antifriction anti-wear composite material is composed of polyethylene with an ultra-high molecular weight and sodium polyacrylate with an ultra-high molecular weight; and the method comprises the steps of firstly selecting the polyethylene powder with the ultra-high molecular weight and the sodium polyacrylate powder with the ultra-high molecular weight, performing drying, performing mixing to form mixed powder, placing the mixed powder in a mold, performing pre-pressing on the mixed powder by using a hot press, and performing a hot pressing forming process by the hot press to obtain the antifriction anti-wear composite material. According to the method provided by the invention, theprinciple that charge repulsion happens between ions generated by hydrolysis of the electrolyte sodium polyacrylate and free ions in seawater is utilized, so that loss of materials is reduced, the tribological properties of the polyethylene with the ultra-high molecular weight are increased, and finally the antifriction anti-wear composite material used for marine equipment is obtained; and the friction coefficient, the wear scar depth and the wear scar width of the antifriction anti-wear composite material under the seawater environment are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a material used for manufacturing marine equipment, in particular to a friction-reducing and anti-wear composite material and a preparation method thereof. Background technique [0002] Friction loss accounts for one-third of the world's primary energy, and about 70% of equipment damage is caused by various forms of wear and tear. Friction and wear in the marine environment is complex, but has one thing in common: particle erosion. One of the particularities of the marine environment: there are a large number of water molecules, free ions and particulate matter in the marine environment. such as Na + , Cl - Plasma, adsorbed between the contact surfaces of the friction pairs that slide each other, is prone to abrasive wear and corrosion wear, which will cause premature failure of the friction pairs. Prepare a polymer composite material, modify it, reduce free ions or p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L33/02
CPCC08L23/06C08L2207/068
Inventor 段海涛杨田李健詹胜鹏凃杰松贾丹齐建伟金永亮魏雷
Owner WUHAN RES INST OF MATERIALS PROTECTION
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