Ultrathin molybdenum disulfide nanosheet/polyimide self-lubricating composite material and preparation method thereof

A molybdenum disulfide and polyimide technology, which is applied in the field of ultra-thin molybdenum disulfide nanosheets/polyimide self-lubricating composite materials, can solve the problems of easy environmental pollution and difficult removal, and achieve a short running-in period. , low wear rate, the effect of enhancing wear resistance

Inactive Publication Date: 2017-06-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among these methods, the former involves organic solvents, which are difficult to remove and easily pollute the environment, while the latter involves high-temperature treatment processes

Method used

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  • Ultrathin molybdenum disulfide nanosheet/polyimide self-lubricating composite material and preparation method thereof
  • Ultrathin molybdenum disulfide nanosheet/polyimide self-lubricating composite material and preparation method thereof
  • Ultrathin molybdenum disulfide nanosheet/polyimide self-lubricating composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Dissolve ammonium molybdate tetrahydrate in deionized water to form a solution of 0.03mol / L, then add a certain proportion of thiourea (ammonium molybdate tetrahydrate: thiourea = 1:30 molar ratio), ultrasonically disperse and magnetically stir , after mixing, move it to a reactor for hydrothermal reaction, the reaction temperature is 220°C, and the reaction time is 22 hours. Then cool naturally, centrifuge, wash and dry to obtain ultra-thin molybdenum disulfide nanosheets. The X-ray diffraction pattern (XRD) of the obtained ultrathin molybdenum disulfide nanosheets is as follows: figure 1 , and its TEM appearance is as figure 2 and 3 . From figure 1 It can be seen that all the diffraction peaks are consistent with the standard card of pure hexagonal molybdenum disulfide (PDFNo.37-1492, and ) coincides, and no other impurity peaks appear, indicating that the prepared molybdenum disulfide purity is very high; from figure 2 It can be seen that molybdenum disulf...

Embodiment 2

[0034] Dissolve ammonium molybdate tetrahydrate in deionized water to form a solution of 0.03mol / L, then add a certain proportion of thiourea (ammonium molybdate tetrahydrate: thiourea = 1:30 molar ratio), ultrasonically disperse and magnetically stir , after mixing, move it to a reactor for hydrothermal reaction, the reaction temperature is 200°C, and the reaction time is 24 hours. Then cool naturally, centrifuge, wash, and dry to obtain ultra-thin molybdenum disulfide nanosheets with a thickness of about 4-6 nm, which is consistent with Example 1.

Embodiment 3

[0036] Dissolve ammonium molybdate tetrahydrate in deionized water to form a solution of 0.03mol / L, then add a certain proportion of thiourea (ammonium molybdate tetrahydrate: thiourea = 1:30 molar ratio), ultrasonically disperse for 20 minutes, Magnetic stirring was carried out for 30 minutes, and after mixing, the mixture was transferred to a reaction kettle for hydrothermal reaction. The reaction temperature was 220° C. and the reaction time was 20 hours. Then cool naturally, centrifuge, wash, and dry to obtain ultra-thin molybdenum disulfide nanosheets with a thickness of about 4-6 nm, which is consistent with Example 1.

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Abstract

The invention provides an ultrathin molybdenum disulfide nanosheet/polyimide self-lubricating composite material and a preparation method thereof. The preparation method comprises the following preparation steps that ammonium molybdate tetrahydrate is dissolved in deionized water and is prepared into an ammonium molybdate solution, thiourea is added, ultrasonic dispersion and even magnetic stirring are performed, the mixture is transferred to a reaction kettle, and hydrothermal reaction is performed; then, natural cooling, centrifugation, washing and drying are performed to obtain ultrathin disulfide molybdenum nanosheets; the ultrathin disulfide molybdenum nanosheets and polyimide resin are mixed evenly to obtain the mixture of the disulfide molybdenum nanosheets and the polyimide resin, the mixture is poured into a mold, hot pressed sintering is performed in a gradient heating mode, natural cooling is performed, and mold release is performed to obtain the ultrathin molybdenum disulfide nanosheet/polyimide self-lubricating composite material. The ultrathin molybdenum disulfide nanosheet/polyimide self-lubricating composite material has the advantages of being short in frictional 'running-in' period, small in friction coefficient, low in abrasion rate and the like and can be used in aviation, aerospace, machinery, electrons and other national defense and civil fields.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to an ultra-thin molybdenum disulfide nanosheet / polyimide self-lubricating composite material. Background technique [0002] In recent years, in the field of tribology, self-lubricating composite materials are a new class of special-purpose materials developed to solve the friction and wear problems of materials under specific working conditions. Polymer self-lubricating composite materials have also attracted extensive attention from researchers in this field due to their light weight, high specific strength, good formability, and excellent self-lubricating properties. The radiation resistance, high and low temperature resistance, chemical resistance, flame resistance, wear resistance and product dimensional stability of polyimide rank first among all kinds of plastics, and become an excellent polymer self-lubricating material matrix. Especially in high tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K7/00C08K3/30
CPCC08K3/30C08K7/00C08K2003/3009C08K2201/011C08L79/08
Inventor 陈贝贝李晓芳李祥杨进李长生
Owner JIANGSU UNIV
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