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Polydopamine nanosphere/boron nitride quantum dot/graphene solid lubricant, and preparation method, application and composite material thereof

A polydopamine nano, solid lubricant technology, applied in the field of composite materials, solid lubrication and composite materials, can solve the problems of large friction coefficient, poor wear resistance, high wear rate, and achieve increased service life and strong wear resistance. Effect

Pending Publication Date: 2021-12-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the present invention provides a polydopamine nanosphere / boron nitride quantum dot / graphene solid lubricant and its preparation method, application and composite material to solve the problem that after the combination of the current lubricating additive and the matrix, The complex has the problems of large friction coefficient, high wear rate and poor wear resistance

Method used

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preparation example Construction

[0029] The invention provides a kind of preparation method of polydopamine nanosphere / boron nitride quantum dot / graphene solid lubricant, comprising the following steps:

[0030] First, put 40-50 parts of ethanol, 90 parts of deionized water and 4-8 parts of ammonia water in a three-necked flask, stir for 30 minutes to make them evenly mixed,

[0031] Then dissolve 0.5 parts of dopamine hydrochloride into 10 parts of deionized water to form a solution, and slowly add it dropwise to the above mixed solution, stir at room temperature for 48 hours, centrifuge, wash with water, and then dry in vacuum at 45°C After drying in the oven for 12 hours, polydopamine nanospheres were obtained, which were denoted as PDA NS.

[0032] Next, mix 1-7 parts of PDA NS and 1 part of GO evenly, stir at room temperature at 15-28°C for 6-24 hours, then add 1-3 parts of hydrazine hydrate and reflux at 100°C for 6-12 hours. GO was reduced to obtain a product system of PDA NS / RGO composite particles. ...

Embodiment 1

[0049] 1) First, put 40 parts of ethanol, 90 parts of deionized water and 4 parts of ammonia water in a three-necked flask, stir for 30 minutes to make them evenly mixed, then dissolve 0.5 parts of dopamine hydrochloride into 10 parts of deionized water to form a solution, and mix it Slowly add it dropwise to the above mixed solution, stir at room temperature 15-28°C for 48h, centrifuge, wash with water, and dry in a vacuum oven at 45°C for 12h to obtain polydopamine nanospheres, which are designated as PDA NS. Next, mix 1 part of PDA NS and 1 part of GO evenly, stir at room temperature at 15-28 °C for 6 h, add 1 part of hydrazine hydrate and reflux at 100 °C for 6 h to reduce GO and obtain PDA NS For the product system of / RGO composite particles, after the product system was cooled, it was washed three times with deionized water, and freeze-dried to prepare PDA NS / RGO composite particles for future use. Next, add 1 part of boric acid to 30 parts of deionized water, under the...

Embodiment 2

[0054] 1) First, put 40 parts of ethanol, 90 parts of deionized water and 4 parts of ammonia water in a three-necked flask, stir for 30 minutes to make them evenly mixed, then dissolve 0.5 parts of dopamine hydrochloride into 10 parts of deionized water to form a solution, and mix it Slowly add it dropwise to the above mixed solution, stir at room temperature 15-28°C for 48h, centrifuge, wash with water, and dry in a vacuum oven at 45°C for 12h to obtain polydopamine nanospheres, which are designated as PDA NS. Next, mix the above-mentioned 7 parts of PDA NS and 1 part of GO evenly, stir at room temperature at 15-28 °C for 6 h, add 3 parts of hydrazine hydrate and reflux at 100 °C for 6 h to reduce GO and obtain PDA NS For the product system of / RGO composite particles, after the product system was cooled, it was washed three times with deionized water, and freeze-dried to prepare PDA NS / RGO composite particles for future use. Next, add 1 part of boric acid to 30 parts of deio...

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PUM

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Abstract

The invention discloses a polydopamine nanosphere / boron nitride quantum dot / graphene solid lubricant, a preparation method and application thereof, and a composite material. The preparation method comprises the following steps: uniformly mixing and stirring ethanol, deionized water and ammonia water to obtain a mixed solution; dissolving dopamine hydrochloride into deionized water, dropwise adding into the mixed solution, sequentially stirring, centrifuging, washing with water, and drying to obtain PDA NS; uniformly mixing and stirring the PDA NS and GO, then adding hydrazine hydrate for reflux condensation to obtain a PDA NS / RGO composite particle product system, and after the PDA NS / RGO composite particle product system is cooled, washing and freeze-drying the product system to obtain PDA NS / RGO composite particles; adding boric acid into ionized water, adding ammonia water, magnetically stirring uniformly, and cooling in a reaction kettle to obtain BNQDS; and carrying out magnetic stirring on the BNQDS and the PDA NS / RGO composite particles, and carrying out freeze drying to obtain the PDA NS / BNQDS / RGO solid lubricant. The obtained solid lubricant can reduce and stabilize the friction coefficient of a matrix material and improve the wear resistance of the matrix material.

Description

technical field [0001] The invention belongs to the field of solid lubrication and the technical field of composite materials, in particular to a polydopamine nanosphere / boron nitride quantum dot / graphene solid lubricant and its preparation method, application and composite material. Background technique [0002] With the rapid development of modern industrial production, mechanical equipment is used more and more frequently in all walks of life, and the loss of energy and materials caused by friction and wear of machinery and its parts is also becoming more and more serious. Therefore, the study of friction and wear is of great significance. Among them, in the field of tribology, the polymer matrix itself has the problems of large and unstable friction coefficient and poor wear resistance, which greatly limits its application range. At present, in order to slow down the friction and wear of equipment, improve the operating efficiency of machinery, prolong the service life ...

Claims

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Application Information

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IPC IPC(8): C08L79/04C08K3/38C08K3/04C08L79/08C08L63/02C08L25/06C08L61/16
CPCC08K3/38C08K3/042C08L79/08C08L63/00C08L25/06C08L61/16C08K2003/385C08L79/04
Inventor 刘超李茜林阳薛新鲍艳张文博殷青
Owner SHAANXI UNIV OF SCI & TECH
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