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A kind of hybrid self-lubricating microcapsule and its preparation method, self-lubricating composite material and its preparation method

A composite material and self-lubricating technology, which is applied in the direction of microcapsule preparation and microsphere preparation, can solve the problems of difficult microcapsules, easy dispersion and uneven performance, and reduce the performance of composite materials, and achieve excellent mechanical properties and simple post-processing methods , The effect of simple preparation method

Active Publication Date: 2020-09-25
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the solvent evaporation method is used to prepare oil-containing microcapsules, polyvinyl alcohol and gelatin are mostly used as dispersants. Not only is it difficult to obtain microcapsules after post-processing, but also the prepared self-lubricating microcapsules are easily dispersed unevenly when used in the preparation of composite materials, making composite materials Delamination creates areas of accumulation in the upper layer and starved areas in the lower layer, reducing the performance of the composite

Method used

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  • A kind of hybrid self-lubricating microcapsule and its preparation method, self-lubricating composite material and its preparation method
  • A kind of hybrid self-lubricating microcapsule and its preparation method, self-lubricating composite material and its preparation method
  • A kind of hybrid self-lubricating microcapsule and its preparation method, self-lubricating composite material and its preparation method

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preparation example Construction

[0047] The present invention also provides a preparation method of the hybrid self-lubricating microcapsule described in the above technical scheme, comprising the following steps:

[0048] Mix polysulfone, lubricating oil and methylene chloride to obtain an organic phase;

[0049] mixing the ionic dispersant, polyvinylpyrrolidone, modified solid lubricant and water to obtain an aqueous phase;

[0050] The organic phase and the water phase are mixed, and the obtained mixed liquid is sequentially dispersed, stirred, left standing and suction filtered to obtain the hybrid self-lubricating microcapsule.

[0051] The invention mixes polysulfone, lubricating oil and methylene chloride to obtain an organic phase.

[0052] The present invention does not specifically limit the mixing method of the polysulfone, lubricating oil and methylene chloride, and the mixing method and means well known to those skilled in the art can be used.

[0053] The invention mixes ionic dispersant, poly...

Embodiment 1

[0075] Disperse the graphite with ethanol, ultrasonicate in a 350kW ultrasonic cell for 48 hours, the particle size of the obtained solid lubricant is 1-10μm; then take out 10g, stir and drop hydrochloric acid at 50°C to adjust the pH value to 5, add 2g KH550, stir After 12 hours, filter and wash with suction to obtain a modified graphite solid lubricant.

[0076] 20g polysulfone, 30g Pegasus II and 405g methylene chloride are blended into a uniform organic phase; then pour into 500g aqueous solution containing 5g sodium lauryl sulfate, 1g polyvinylpyrrolidone and 5g modified graphite solid lubricant; Disperse the mixture of organic phase and water phase on a 16000rpm disperser for 1min, fix the stirring speed at 700rpm, stir at 35°C for 6h, then let it stand for 12h, pour off the supernatant, filter and wash the precipitate to obtain a hybrid self-lubricating micro capsule.

[0077] Take 60g of epoxy resin, heat at 80°C for 30min, then add 40g of hybrid self-lubricating micr...

Embodiment 2

[0079] Disperse molybdenum disulfide with ethanol, ultrasonicate in a 350KW ultrasonic tank for 24 hours, the particle size of the obtained solid lubricant is 5-10μm; then take out 10g, stir and drop hydrochloric acid at 50°C to adjust the pH value to 6, add 2g KH550 , stirred for 24 hours, suction filtered and washed to obtain a modified molybdenum disulfide solid lubricant;

[0080] Blend 10g of polysulfone, 15g of Pegasus II and 270g of dichloromethane into a homogeneous organic phase; then pour into 500mL containing 10g of sodium lauryl sulfate, 1g of polyvinylpyrrolidone and 5g of modified molybdenum disulfide solid lubricant Aqueous solution; disperse the mixture of organic phase and aqueous phase on a disperser at 13000rpm for 2min, fix the stirring speed at 500rpm, stir at 30°C for 12h, then let it stand for 0.5h, pour off the supernatant, filter with suction, and wash the precipitate to obtain impurities Self-lubricating microcapsules.

[0081] Take 70g of epoxy resi...

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Abstract

The invention provides a hybrid self-lubricating microcapsule and a preparation method thereof, a self-lubricating composite material and a preparation method thereof, and belongs to the technical field of self-lubricating materials. The hybrid self-lubricating microcapsule is prepared from an organic phase and an aqueous phase by a solvent evaporation method, wherein the organic phase comprises polysulfone, lubricating oil and dichloromethane, the aqueous phase comprises an ionic dispersant, polyvinylpyrrolidone, a modified solid lubricant and water, the modified solid lubricant is a solid lubricant modified by a silane coupling agent, and the solid lubricant is graphite or molybdenum disulfide. In the hybrid self-lubricating microcapsule, the ionic dispersant is used as a main dispersant, polyvinylpyrrolidone and the modified solid lubricant are used as auxiliary dispersants, and the use of the auxiliary dispersants reduces a use amount of the ionic dispersant; and at the same time,the modified solid lubricant is also used as a wall material of the microcapsule, dispersion properties of the hybrid self-lubricating microcapsule in a resin matrix are improved, and mechanical properties of the self-lubricating composite material are improved.

Description

technical field [0001] The invention relates to the technical field of self-lubricating materials, in particular to a hybrid self-lubricating microcapsule and a preparation method thereof, a self-lubricating composite material and a preparation method thereof. Background technique [0002] Since self-lubricating materials can continuously and stably achieve a good lubrication effect without the support of external lubrication, self-lubricating materials are widely used in industry, transportation, aerospace and other fields. At present, a large number of patents have reported the application of self-lubricating polymer materials, for example: patent CN200910308677.0 discloses a bearing cage material and its preparation method, patent CN201410542228.3 discloses the bonding of bearing phenolic resin tape cage and aluminum sheet The method, patent CN201510466829.5 discloses a preparation method of polyether ether ketone modified polytetrafluoroethylene self-lubricating composit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/06C08K9/06C08K3/04C08K3/30C08L63/00B01J13/12
CPCB01J13/125C08K2003/3009C08L63/00C08L81/06C08K9/06C08K3/04C08K3/30
Inventor 王廷梅邵明超王超王齐华
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI