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A kind of solvent-free graphene oxide-supported silica nano-fluid and its application

A silicon dioxide and fluid-like technology, which is applied in the direction of additives, petroleum industry, lubricating compositions, etc., to achieve the effects of enhancing strength, improving processing and application performance, and avoiding direct contact

Active Publication Date: 2021-05-25
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the research on graphene oxide-supported silica nano-fluids has not been reported yet.

Method used

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  • A kind of solvent-free graphene oxide-supported silica nano-fluid and its application

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Experimental program
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Effect test

Embodiment 1

[0038]In parts by mass, 100 parts of silica nanoparticles (8 nm) were dispersed in a mixed solution of 550 mL of deionized water (50 mL) and ethanol (500 mL), ultrasonicated for 1 h, and 100 parts of % of 3-aminopropyltriethoxysilane surfactant, stirred and refluxed at 90 °C for 24 h, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried in vacuum at 80 °C for 24 h to obtain surfactant-modified of silica nanoparticles. In parts by mass, 10 parts of graphene oxide were dispersed in 300 mL of deionized water, ultrasonically stripped for 2 h, 20 parts of modified silica nanoparticles were added, reacted at 80 °C for 12 h, and the product was centrifuged at 10,000 rpm and washed with deionized water Wash and purify with ethanol, and dry in vacuum at 80 °C for 24 h to obtain graphene oxide-supported silica nanoparticles; in parts by mass, take 20 parts of graphene oxide-supported silica nanoparticles and disperse them in 100 mL of deionized Sonicate in wate...

Embodiment 2

[0041] In parts by mass, 40 parts of silica nanoparticles (12 nm) were dispersed in a mixed solution of 300 mL of deionized water (20 mL) and ethanol (280 mL), ultrasonicated for 1 h, and 100 parts of % of 3-aminopropyltriethoxysilane surfactant, stirred and refluxed at 120 °C for 24 h, the product was centrifuged at 10,000 rpm, washed and purified with deionized water and ethanol, and dried in vacuum at 80 °C for 24 h to obtain surface active Agent-modified silica nanoparticles. In parts by mass, 10 parts of graphene oxide were dispersed in 300 mL of deionized water, ultrasonically stripped for 1 h, 40 parts of modified silica nanoparticles were added, reacted at 100 °C for 12 h, and the product was washed with deionized water and ethanol after centrifugation Purify and dry in vacuum at 80 °C for 24 h to obtain graphene oxide-supported silica nanoparticles; according to the mass fraction, take 10 parts of graphene oxide-supported silica nanoparticles, disperse them in 100 mL ...

Embodiment 3

[0043] In parts by mass, disperse 10 parts of silica nanoparticles (25 nm) in a mixed solution of 210 mL deionized water (10 mL) and ethanol (200 mL), sonicate for 1 h, and add 100 parts with a mass fraction of 65 % of 3-aminopropyltriethoxysilane surfactant, stirred and refluxed at 150 °C for 8 h, centrifuged at 10000 rpm, washed with deionized water and ethanol, and dried in vacuum at 80 °C for 24 h to obtain surfactant-modified Silica nanoparticles. In parts by mass, 10 parts of graphene oxide were dispersed in 300 mL of deionized water, ultrasonically stripped for 1 h, 150 parts of modified silica nanoparticles were added, reacted at 160 °C for 8 h, and the product was centrifuged at 10,000 rpm and washed with deionized water Wash and purify with ethanol, and vacuum-dry at 80 °C for 24 h to obtain graphene oxide-supported silica nanoparticles; in parts by mass, take 10 parts of graphene oxide-supported silica nanoparticles and disperse them in 100 mL deionized water , son...

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Abstract

The invention discloses a solvent-free graphene oxide-loaded silicon dioxide nano-fluid, which uses a graphene oxide-loaded silicon dioxide composite system as a nano-nucleus to synthesize a solvent-free nano-fluid, and uses a surfactant to treat the silicon dioxide nano-particles. modified to obtain positively charged silica nanoparticles, and then use electrostatic self-assembly to load the modified silica nanoparticles on the surface of graphene oxide sheets, and graft silane coupling with different functional groups by chemical bonding. agent and flexible long-chain molecules to synthesize a solvent-free graphene oxide-supported silica nano-like fluid. The invention also discloses the application of the nano fluid. The nano fluid of the invention can effectively improve the lubricating performance of the system, simultaneously enhance the strength of the adsorption film and the tribochemical reaction film, and improve the boundary lubricating ability of the friction pair.

Description

technical field [0001] The invention belongs to the technical field of lubricants, and relates to a solvent-free graphene oxide-loaded silicon dioxide nanometer fluid and an application thereof. Background technique [0002] Graphene oxide has a large specific surface area, high mechanical flexibility, excellent crystal properties and good elastic modulus, and has received extensive attention in the fields of nanocomposites, polymer composites, catalysis and friction. In recent years, with the development of nanoscience and technology, combining nanomaterials with different shapes and chemical compositions through appropriate methods to develop a series of multifunctional composite materials with unique optical, electrical, magnetic and mechanical properties has gradually become a research hotspot. . The combination of graphene oxide and inorganic nanoparticles can enhance the comprehensive performance of the composite system by utilizing the synergistic effect of the two, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M159/12C10N30/06
CPCC10M159/12C10M2201/041C10M2201/105C10M2201/14C10M2217/06C10M2227/04C10N2030/06C10N2030/56C10N2020/06
Inventor 张嘎郭月霞赵福燕李贵涛张利刚
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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