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Method for preparing Ag/PMMA (polymethyl methacrylate) nano composite material

A nano-composite material and nano-sol technology is applied in the field of preparation of Ag/PMMA nano-composite materials, which can solve the problems of not using Ag/PMMA nano-composite materials, etc., to prevent aging and etching, controllable design and preparation, The effect of uniform and stable distribution

Inactive Publication Date: 2012-09-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The novelty search results of domestic and foreign patents and literature show that there is no research report on the preparation of bulk Ag / PMMA nanocomposites by solvent precipitation to remove high-boiling DMF solvents.

Method used

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  • Method for preparing Ag/PMMA (polymethyl methacrylate) nano composite material
  • Method for preparing Ag/PMMA (polymethyl methacrylate) nano composite material
  • Method for preparing Ag/PMMA (polymethyl methacrylate) nano composite material

Examples

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Effect test

specific example 1

[0036] 1. Put 7.5g PMMA (average molecular weight 300,000) and 140g DMF into the reaction vessel, add 0.04g PVP (average molecular weight 40,000) and stir for 30min to mix evenly, then add 0.0612g AgNO 3 , after heating and reacting at 140° C. for 5 min, stop heating to obtain Ag / PMMA sol containing Ag nanoparticles.

[0037] 2. Under the condition of strong mechanical stirring, slowly pour the Ag / PMMA nano-sol into the ethanol solvent for solvent precipitation, and wash the precipitate with fresh ethanol 3 times after filtration, wherein the volume ratio of the Ag / PMMA nano-sol to the ethanol solvent is 1:10 .

[0038]3. The Ag / PMMA precipitate was dried at 60°C for one week, and then hot-pressed at 180°C to obtain the Ag / PMMA nanocomposite material.

[0039] The content of Ag nanoparticles in the Ag / PMMA sol that this method obtains is 0.5wt.%, and its ultraviolet visible spectrogram is as follows image 3 As shown, the absorption peak in the wavenumber range of 400-450nm ...

specific example 2

[0041] 1. Put 7.5g PMMA (average molecular weight 300,000) and 140g DMF into the reaction vessel, add 0.04g PVP (average molecular weight 40,000) and stir for 30min to mix evenly, then add 0.0612g AgNO 3 , after heating and reacting at 140° C. for 15 min, the heating was stopped to obtain Ag / PMMA sol containing Ag nanoparticles.

[0042] 2. Under the condition of strong mechanical stirring, slowly pour the Ag / PMMA nano-sol into the ethanol solvent for solvent precipitation, and wash the precipitate with fresh ethanol 3 times after filtration, wherein the volume ratio of the Ag / PMMA nano-sol to the ethanol solvent is 1:10 .

[0043] 3. The Ag / PMMA precipitate was dried at 60°C for one week, and then hot-pressed at 180°C to obtain the Ag / PMMA nanocomposite material.

[0044] The content of Ag nanoparticles in the Ag / PMMA sol that this method obtains is 0.5wt.%, and its ultraviolet visible spectrogram is as follows image 3 As shown, the absorption peak in the wavenumber range ...

specific example 3

[0046] 1. Put 7.5g PMMA (average molecular weight 300,000) and 140g DMF into the reaction vessel, add 0.04g PVP (average molecular weight 40,000) and stir for 30min to mix evenly, then add 0.0612g AgNO 3 , after heating and reacting at 140° C. for 30 min, stop heating to obtain Ag / PMMA sol containing Ag nanoparticles.

[0047] 2. Under the condition of strong mechanical stirring, slowly pour the Ag / PMMA nano-sol into the ethanol solvent for solvent precipitation, and wash the precipitate with fresh ethanol 3 times after filtration, wherein the volume ratio of the Ag / PMMA nano-sol to the ethanol solvent is 1:10 .

[0048] 3. The Ag / PMMA precipitate was dried at 60°C for one week, and then hot-pressed at 180°C to obtain the Ag / PMMA nanocomposite material.

[0049] The content of Ag nanoparticles in the Ag / PMMA sol that this method obtains is 0.5wt.%, and its ultraviolet visible spectrogram is as follows image 3 As shown, the absorption peak in the wavenumber range of 400-450n...

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Abstract

The invention provides a method for preparing an Ag / PMMA (polymethyl methacrylate) nano composite material. Particularly, in the method, PMMA is used as a polymer matrix; PMMA is the English abbreviation of polymethyl methacrylate; silver nitrate is used as an Ag source; PVP (Polyvinyl Pyrrolidone) is used as a dispersing agent; PVP is the English abbreviation of polyvinyl pyrrolidone; DMF (N,N-dimethyl formamide) is used as a solution solvent and a reducing agent; and DMF is the English abbreviation of N,N-dimethyl formamide. The method comprises the following steps of: heating the PMMA, thesilver nitrate, the PVP and the DMF and performing a reaction to obtain Ag / PMMA nano sol containing Ag nano particles; then removing the reducing agent DMF in the Ag / PMMA nano sol by adopting a solvent precipitation method; drying the obtained product; and carrying out heating and forming on the dried product to obtain the Ag / PMMA nano composite material. The method adopts a simple preparation process, can effectively solve the problem of the aggregation phenomenon when the Ag / PMMA nano composite material is prepared by a conventional method and realizes accurate design, regulation and control of diameter of particles and topography of the Ag nano particles.

Description

technical field [0001] The invention relates to the research field of synthesizing metal nanoparticles with DMF as a reducing agent in a polymer environment and requires the preparation of a polymer-based nanocomposite material, in particular to a preparation method of an Ag / PMMA nanocomposite material. Background technique [0002] N, N-dimethylformamide (DMF) is the most common organic solvent that can dissolve polymers and reduce metal nanoparticles, which makes it possible to obtain metal nanoparticles in a polymer environment by one-step reduction. In recent years, the reduction of Ag by DMF + There are a large number of research reports on the mechanism and process of the method, and the method has been successfully prepared Ag / PMMA nanocomposite thin film material, and used in the research fields of optics and electricity. However, due to the high boiling point of DMF (153°C), the removal process is slow. At the same time, due to the reduction of DMF, it will have a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08L39/06C08K3/08
Inventor 沈强熊远禄罗国强张晓光陈程李美娟张联盟
Owner WUHAN UNIV OF TECH
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