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A preparation method of intelligent self-lubricating composite material containing electromagnetically triggered microcapsules

A technology of electromagnetic triggering and composite materials, which is applied in the direction of microcapsule preparation, microsphere preparation, conductive coating, etc., can solve the problems of microcapsule rupture, low microcapsule rupture efficiency, and temperature rise, so as to improve self-lubricating efficiency and achieve reliable Effects of tuning stimulus responses

Active Publication Date: 2020-07-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mechanical or thermal stimulation usually has the following defects: (1) The microcapsule rupture efficiency is low or non-selective during mechanical triggering, and the stress generated by small cracks in the composite material cannot trigger the rupture of microcapsules; (2) The thermal triggering process may Will cause total rupture of microcapsules in the heated area, rather than selective rupture of microcapsules in small localized areas
At the same time, the temperature rise in the friction and wear area is high, and the core material cannot effectively enter the wear area with high local temperature after the microcapsules are broken due to the thermal capillary effect

Method used

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  • A preparation method of intelligent self-lubricating composite material containing electromagnetically triggered microcapsules

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Embodiment 1

[0029] (1) The preparation process of conductive polymer matrix and electromagnetic trigger microcapsules:

[0030] ① Preparation of conductive polymer matrix:

[0031] The conductive polyaniline matrix was prepared by chemical oxidative polymerization. Add 5 mL of aniline and 50 mL of 2 mol / L hydrochloric acid solution into a three-necked flask, and stir for 2 h in an ice-water bath at 5°C. Take 11.4 g of 2 mol / L ammonium persulfate solution, add it dropwise into a three-necked flask, keep the system temperature below 5°C, and continue the reaction for 3 h. Suction filter, wash three times with deionized water, filter and dry.

[0032] ② Preparation of electromagnetically triggered microcapsules:

[0033] a Electromagnetically triggered microcapsules were prepared by inverse emulsion polymerization. The preparation process of emulsion A is as follows: add 20mL of 10wt% polyvinyl alcohol solution and 5g of lubricating oil into a three-necked flask, stir at 90°C for 5h, and...

Embodiment 2

[0040] ① Preparation of conductive polymer matrix:

[0041] Conductive polypyrrole matrix was prepared by chemical oxidation polymerization. Add 10 mL of pyrrole and 70 mL of 2 mol / L hydrochloric acid solution into a three-necked flask, and stir for 2 h in an ice-water bath at 5°C. Take 15 g of 2 mol / L ammonium persulfate solution, add it dropwise into a three-necked flask, keep the temperature of the system below 5°C, and continue the reaction for 3 hours. Suction filter, wash three times with deionized water, filter and dry.

[0042] ② Preparation of electromagnetically triggered microcapsules:

[0043] a Electromagnetically triggered microcapsules were prepared by inverse emulsion polymerization. The preparation process of emulsion A is as follows: add 20mL of 10wt% polyvinyl alcohol solution and 5g of ball-milled black phosphorus nanosheets into a three-necked flask, stir at 90°C for 5h, and cool to 65°C. Take 100mL of n-hexane, 10mL of 20wt% acrylic acid, 6mL of Span ...

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Abstract

The invention relates to a preparation method of the intelligent self-lubricating composite material containing the electromagnetic trigger microcapsules. The intelligent self-lubricating composite material comprises a conductive polymer matrix and the electromagnetic trigger microcapsules. According to the invention, the release of core-material active substances by the microcapsules are remotelyregulated and controlled through external electromagnetic stimulation, and self-repairing of lubrication and corrosion resistance of the conductive polymer composite material is realized. Compared with existing self-lubricating composite materials, the composite material provided by the invention has continuously variable electric current and magnetic field intensity which are triggered by electromagnetic stimulation, so that tunable stimulation response is realized. The intelligent composite material system and a self-repairing / self lubricating strategy thereof provided by the invention havelarge application potential and market value in the fields of self-lubricating bearings, anti-corrosion coatings, battery electrode materials and the like.

Description

technical field [0001] The invention belongs to the technical field of solid-phase self-lubricating and wear-resistant composite materials, and in particular relates to a preparation method of an intelligent self-lubricating composite material containing electromagnetic trigger microcapsules. Background technique [0002] Material corrosion and friction and wear are one of the main causes of energy dissipation and damage failure of key components of mechanical systems. Statistics show that frictional energy consumption accounts for about 1 / 3 of primary energy, while corrosion and wear are the main ways of material and equipment failure (about 80%), which have become the basic factors restricting the performance of equipment. Therefore, exploring new anti-corrosion protection and anti-friction lubrication technologies has become one of the important ways to save energy and resources, alleviate environmental pollution, and eliminate potential safety hazards. In recent years, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/04C09D179/02C09D5/24C08G73/06C08G73/02B01J13/14
CPCB01J13/14C08G73/0266C08G73/0611C09D5/24C09D179/02C09D179/04C08K9/10C08K3/041
Inventor 解国新王涯雒建斌
Owner TSINGHUA UNIV
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