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In-site silver nano-particle/polymer composite molecular film and preparation method thereof

A technology of silver nanoparticles and composite molecules, which is applied in the fields of composite molecular films and their preparation, in-situ silver nanoparticles/polymer composite molecular films and their preparations, can solve the problems affecting the performance of molecular films and easy agglomeration, etc., to achieve Guaranteed stability and service life, uniform distribution, good wear resistance effect

Inactive Publication Date: 2009-12-16
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Application Information

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Problems solved by technology

In this method, it is necessary to prepare titanium dioxide nanoparticles and coat them with polyacrylic acid, and then use molecular deposition technology to form a thin film. In actual operation, the operating conditions must be strictly controlled. If the operating conditions are not properly controlled, titanium dioxide nanoparticles are prone to agglomeration. and affect the properties of the formed molecular film

Method used

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  • In-site silver nano-particle/polymer composite molecular film and preparation method thereof
  • In-site silver nano-particle/polymer composite molecular film and preparation method thereof
  • In-site silver nano-particle/polymer composite molecular film and preparation method thereof

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Embodiment 1

[0040] Embodiment 1: In situ silver nanoparticles / polymer composite molecular film and preparation method thereof

[0041] The preparation method of the in-situ silver nanoparticle / polymer composite molecular film in the present embodiment is specifically carried out according to the following operations:

[0042] ① Base preparation:

[0043] Step a1: Take a substrate (glass, quartz or silicon wafer) and clean it; the cleaning step can be carried out according to the conventional operation in this field, for example, first use petroleum ether to scrub to remove the wax layer, and then use polar solvents such as acetone and chloroform to clean it ultrasonically Remove other organic layers, and then ultrasonically clean with ethanol and deionized water to remove particles and other pollutants on the surface of the substrate;

[0044] Step a: put the substrate cleaned in step a1 into the 80°C containing H 2 SO 4 with H 2 o 2 solution for about 60 minutes to hydroxylate the s...

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Abstract

The invention relates to an in-site silver nano-particle / polymer composite molecular film and a preparation method thereof. The film is provided with at least one double-layer composite film of a poly(allylamine) hydrochloride film and a polyacrylic acid film which contain silver nano-particles. The method adopts molecular deposition (MD) technology to prepare an AgCl2 doped polyelectrolyte molecular deposition film on a substrate first, and then utilizes sodium borohydride (NaBH4) solution to reduce AgCl2 into Ag nano-particles by adopting a method of in-situ reduction, thereby obtaining the in-site silver nano-particle / polymer composite molecular film. The film belongs to a nanometer ultra-thin film; and the molecular ultra-thin film has good lubricating property, and can improve the abrasion resistance of a polyelectrolyte film.

Description

technical field [0001] The invention relates to a composite molecular film and a preparation method thereof, specifically to an in-situ silver nanoparticle / polymer composite molecular film and a preparation method thereof, belonging to the technical field of material engineering. Background technique [0002] Friction and wear are an important problem to be solved in the lubrication of micro-electromechanical systems and magnetic storage systems, and are important factors affecting the stable operation of the system. It is important to develop a practical thin film (thickness of the thin film is usually nanoscale, also called ultra-thin film) important way to solve this problem. At present, the industry's solutions to this problem are mainly focused on molecular self-assembled films, LB (Langmuor--Blodgett) films, and the composite research of these two films. However, the wear resistance of these two films is relatively poor, which limits its practical application. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B32B27/30C03C17/42B22F9/24
Inventor 郭岩宝王德国
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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