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Branched alkyl substituted silanized aromatic hydrocarbon self-assembled lubricating film and preparation method thereof

A technology for silanizing aromatic hydrocarbons and branched alkyl groups, which is used in lubricating compositions, base materials, petroleum industry, etc., can solve problems such as limited binding force, and achieve the effects of reducing adhesion work, improving strength, and good adhesion.

Active Publication Date: 2020-03-17
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN200910117749.3 discloses "a method for preparing a metal nanoparticle-multi-substituted cyclopentane composite lubricating film", which is to self-assemble on a single crystal silicon substrate to form an octadecyltrichlorosilane film , and then spin-coat a multi-substituted cyclopentane composite film doped with metal nanoparticles on it, that is, the lubricating film described in this patent is composed of an octadecyltrichlorosilane film and a multi-substituted cyclopentane doped with metal nanoparticles The alkane composite film is formed by intermolecular forces, but the binding force between the two films is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Sonicate a square monocrystalline silicon with a side length of 5mm in acetone, water, and ethanol for 10 minutes respectively, and then put it into 5 mL of hydrofluoric acid solution with a mass fraction of 5% for 5 minutes, wash it with water first, and then wash it with ethanol Ultrasonic cleaning for 5 minutes, then immersing in a mixed solution of sulfuric acid and hydrogen peroxide and boiling until no bubbles are generated, first cleaning with water, then cleaning with ethanol, dehydrating and drying, forming free hydroxyl groups on the surface of single crystal silicon, and obtaining hydroxylated monocrystalline silicon. Crystalline silicon;

[0020] (2) Put the hydroxylated single crystal silicon in a hydrothermal reaction kettle, then add 10mL of absolute ethanol and 2mL of phenyltrimethoxysilane, then react at 80°C for 12h, and ultrasonically clean with ethanol. self-assembly on the surface to form a phenylsilane layer;

[0021] (3) Add the monocrystalli...

Embodiment 2

[0024] (1) Sonicate a square monocrystalline silicon with a side length of 5 mm in acetone, water, and ethanol for 30 min, respectively, and then put it into 5 mL of hydrofluoric acid solution with a mass fraction of 35% to react for 0.1 min, wash it with water, and then use Ultrasonic cleaning with ethanol for 5 minutes, then immersing in a mixed solution of sulfuric acid and hydrogen peroxide and boiling until no bubbles are generated, first cleaning with water, then cleaning with ethanol, dehydrating and drying, forming free hydroxyl groups on the surface of single crystal silicon, that is, hydroxylated monocrystalline silicon;

[0025] (2) Put the hydroxylated single crystal silicon in a hydrothermal reaction kettle, add anhydrous 10mL ethanol and 1mL phenyltrimethoxysilane, then react at 40°C for 48h, and ultrasonically clean with ethanol. self-assembly on the surface to form a phenylsilane layer;

[0026] (3) Add the monocrystalline silicon with the surface self-assembl...

Embodiment 3

[0029] (1) Sonicate a square monocrystalline silicon with a side length of 5 mm in acetone, water, and ethanol for 20 minutes, and then put it into 5 mL of hydrofluoric acid solution with a mass fraction of 1% to react for 30 minutes. Ultrasonic cleaning for 5 minutes, then immersing in a mixed solution of sulfuric acid and hydrogen peroxide and boiling until no bubbles are generated, first cleaning with water, then cleaning with ethanol, dehydrating and drying, forming free hydroxyl groups on the surface of single crystal silicon, and obtaining hydroxylated monocrystalline silicon. Crystalline silicon;

[0030] (2) Put the hydroxylated single crystal silicon in a hydrothermal reaction kettle, add 10mL of ethanol and 0.5mL of phenyltrimethoxysilane, then react at 80°C for 48h, and use ethanol to ultrasonically clean the surface of the single crystal silicon self-assembled to form a phenylsilane layer;

[0031] (3) Add the monocrystalline silicon with the surface self-assemble...

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Abstract

The invention relates to a branched alkyl substituted silanized aromatic hydrocarbon self-assembled lubricating thin film and a preparation method thereof, and belongs to the technical field of preparation of lubricants. The lubricating thin film is a branched alkyl substituted silanized aromatic hydrocarbon self-assembled lubricating film obtained by performing Friedel-Crafts reaction on phenyltrimethoxysilane and 1-bromo-2-octyldodecane. The lubricating thin film is bonded with a monocrystalline silicon substrate in a covalent bond form, thereby achieving excellent adhesion; a group connected with the monocrystalline silicon substrate has a rigid benzene ring structure, which can enhance the strength when being subjected to friction; flexible long-chain alkyl is connected on a benzene ring, and has a good antifriction effect; the lubricating film can effectively reduce the friction coefficient of the surface of a miniature monocrystalline silicon device, and has potential applicationvalue in the fields of space micro-machinery and information technology.

Description

technical field [0001] The invention relates to a branched alkyl-substituted silanized aromatic hydrocarbon self-assembled lubricating film and a preparation method thereof, belonging to the technical field of lubricant preparation. Background technique [0002] With the development of my country's space vehicles in the direction of small, light weight and low energy consumption, the active components in the micro-miniature electromechanical system are in urgent need of precision surface lubrication technology. On the premise of ensuring the operating accuracy of the tiny active components, prolonging the life of the tiny active components is the demand. . The micro-nano-scale friction not only requires the lubricant to have low friction and high wear resistance, but more importantly, to improve the adhesion between the lubricant and the substrate and reduce the intermolecular force between the friction pairs. Chinese patent CN200910117749.3 discloses "a method for preparing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M105/76C10M177/00C10N30/06C10N40/06
Inventor 周晖刘鹏霍丽霞杜鹏程张凯锋张文晶胡汉军郑玉刚
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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