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Method for polymerizing and preparing nanometer silver-PAAEM (Ploy Acetoacetoxyethyl Methacrylate) composite material through ultrasonically initiating emulsifier-free emulsion

A soap-free emulsion polymerization and composite material technology is applied in the field of ultrasonic-induced soap-free emulsion polymerization to prepare nano-silver-PAAEM composite materials, which can solve the problems of cumbersome synthesis routes and difficult post-processing.

Inactive Publication Date: 2014-05-28
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are more or less technical defects in the synthesis, such as the use of protective atmosphere, emulsifiers, surfactants, etc., resulting in cumbersome synthesis routes, difficult post-processing and other unfavorable factors

Method used

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  • Method for polymerizing and preparing nanometer silver-PAAEM (Ploy Acetoacetoxyethyl Methacrylate) composite material through ultrasonically initiating emulsifier-free emulsion
  • Method for polymerizing and preparing nanometer silver-PAAEM (Ploy Acetoacetoxyethyl Methacrylate) composite material through ultrasonically initiating emulsifier-free emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of Nano Silver-PAAEM Composite

[0019] Dissolve 0.66g of silver nitrate in 40g of distilled water, stir until completely dissolved, then add 1g of AAEM and 0.01g of ammonium persulfate, place in an ultrasonic reactor for ultrasonication for 50min, the emulsion in the reaction system gradually changes from milky white to gray, after the reaction The emulsion is refrigerated and demulsified, the upper layer liquid is discarded, the obtained colloid is washed with water three times to remove inorganic salts, and then washed with methanol three times, and the sample is obtained by vacuum drying.

Embodiment 2

[0021] Preparation of Nano Silver-PAAEM Composite

[0022] Dissolve 0.6g of silver nitrate in 42g of distilled water, stir until completely dissolved, then add 0.9g of AAEM and 0.012g of ammonium persulfate, place it in an ultrasonic reactor for 45min, the emulsion in the reaction system gradually changes from milky white to gray, after the reaction The emulsion was refrigerated and demulsified, the upper liquid was discarded, the colloid was washed three times with water to remove inorganic salts, and then washed three times with methanol, and the sample was dried in vacuum.

Embodiment 3

[0024] Preparation of Nano Silver-PAAEM Composite

[0025] Dissolve 0.67g of silver nitrate in 40.5g of distilled water, stir until completely dissolved, then add 1.2g of AAEM and 0.005g of ammonium persulfate, place it in an ultrasonic reactor for 55min, the emulsion in the reaction system gradually changes from milky white to gray, react The final emulsion was refrigerated and demulsified, the upper liquid was discarded, the obtained colloid was washed with water three times to remove inorganic salts, and then washed with methanol three times, and the sample was dried in vacuo.

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Abstract

The invention relates to the field of nanometer silver-polymer composite materials, in particular to a method for polymerizing and preparing a nanometer silver-PAAEM (Ploy Acetoacetoxyethyl Methacrylate) composite material through ultrasonically initiating emulsifier-free emulsion. The method comprises the following steps of: dissolving silver nitrate into a proper amount of distilled water, agitating till the dissolution is complete, adding AAEM (Acetoacetyloxyethyl Methacrylate) and ammonium persulfate, putting into an ultrasonic reactor for reaction, gradually changing emulsion in a reaction system from milk white to grey, and refrigerating, demulsifying, upper liquid-removing, washing and drying the reacted emulsion to obtain the nanometer silver-PAAEM composite material. The method has the beneficial effects that under the conditions that the atmosphere protection is not used, and no reducing agent and no emulsifier are added, AAEM and AgNO3 solution is ultrasonically radiated, a silver ion is reduced into a nanometer silver particle, and in-situ polymerization is carried out on the AAEM at the same time to synthesize the nanometer silver-PAAEM composite material; and under the existence of the nanometer silver particle, the thermal property of the substrate PAAEM is greatly improved, and the active effects are generated.

Description

technical field [0001] The invention relates to the field of nano silver-polymer composite materials, in particular to a method for preparing nano silver-PAAEM composite materials through ultrasonic-induced soap-free emulsion polymerization. Background technique [0002] At present, the synthesis methods for nano-silver-polymer composite materials mainly include: ultraviolet radiation method, cavitation method, chemical reduction method and ultrasonic radiation method. The traditional method is to separate the polymerization of monomers from the formation of silver nanoparticles, and then mix them by mechanical force to form composite materials. But this method is difficult to uniformly disperse the nano-silver particles in the polymer matrix. [0003] In order to overcome this disadvantage, in recent years, researchers have shifted their attention to the dual in situ one-step synthesis of nano-silver-polymer composites. This method is to make the reduction of silver ions ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/28C08F2/56C08F2/44C08F2/22C08K3/08
Inventor 徐国财高圣涛赵建峰豆娜
Owner ANHUI UNIV OF SCI & TECH