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Method for preparing silver nanoparticles based on poly(2-acrylamino-2-methyl propanesulfonic acid)

A methylpropanesulfonic acid, acrylamide-based technology, applied in nanotechnology and other directions, can solve the problems of easy agglomeration, irregular shape and wide particle size distribution of nano silver particles, and achieve the effect of obvious agglomeration phenomenon and difficult to agglomerate.

Inactive Publication Date: 2014-04-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prepared silver nanoparticles are easy to agglomerate, irregular in shape and wide in particle size distribution.

Method used

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  • Method for preparing silver nanoparticles based on poly(2-acrylamino-2-methyl propanesulfonic acid)
  • Method for preparing silver nanoparticles based on poly(2-acrylamino-2-methyl propanesulfonic acid)
  • Method for preparing silver nanoparticles based on poly(2-acrylamino-2-methyl propanesulfonic acid)

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Preparation of Nano Silver Particles in 5wt%PAAMPS Emulsion

[0018] Take 30.0g of 2-acrylamido-2-methylpropanesulfonic acid (AAMPS) and add it into 120g of distilled water. After dissolving, add 0.015g of APS. After stirring and dissolving, slowly raise the temperature to 65°C and react at constant temperature for 4 hours to obtain PAAMPS.

[0019] Take 5.0g of PAAMPS and add it to 95.0g of distilled water to configure a PAAMPS emulsion with a mass fraction of 5%. Dissolve 0.44g of sodium hypophosphite in 10mL of distilled water and add it to 100mL of a 5% PAAMPS emulsion with a mass fraction of 5%, followed by electric stirring for 15 Minutes later, the temperature of the reaction system was raised to 40°C, 10mL of silver nitrate solution containing 1.42g was added dropwise, the dropping rate was controlled at 15-20 drops / min, and the reaction time was 90 minutes; then acetone was added to break the emulsion, centrifuged, washed, and dried to obtain Nano-silver partic...

Embodiment 2

[0021] Preparation of Nano Silver Particles in 10wt%PAAMPS Emulsion

[0022] Take 30.0g of 2-acrylamido-2-methylpropanesulfonic acid (AAMPS) and add it into 120g of distilled water. After dissolving, add 0.015g of APS. After stirring and dissolving, slowly raise the temperature to 65°C and react at constant temperature for 4 hours to obtain PAAMPS.

[0023] Take 10.0g of PAAMPS and add it into 90.0g of distilled water to configure a PAAMPS emulsion with a mass fraction of 10%. Dissolve 0.44g of sodium hypophosphite in 10mL of distilled water and add it to 100mL of a 10% mass fraction of PAAMPS emulsion, followed by electric stirring for 15 Minutes later, the temperature of the reaction system was raised to 40°C, 10mL of silver nitrate solution containing 1.42g was added dropwise, the dropping rate was controlled at 15-20 drops / min, and the reaction time was 70 minutes; then acetone was added to break the emulsion, centrifuged, washed and dried to obtain Nano silver particles, ...

comparative example 1

[0025] Preparation of silver nanoparticles in 5wt% sodium dodecylbenzenesulfonate emulsion

[0026] Take 5.0g of sodium dodecylbenzenesulfonate and add it to 95.0g of distilled water to form an emulsion with a mass fraction of 5% sodium dodecylbenzenesulfonate emulsion. Dissolve 0.44g of sodium hypophosphite in 10mL of distilled water and add Into 100mL of 5% sodium dodecylbenzenesulfonate emulsion in mass fraction, and then electric stirring for 15 minutes, the reaction system was heated to 40°C, and 10mL of silver nitrate solution containing 1.42g was added dropwise, and the dropping rate was controlled At 15-20 drops / min, the reaction time is 90 minutes; then add acetone to demulsify, centrifuge, wash, and dry to obtain silver nanoparticles. The particle size distribution is as follows: image 3 (b) shown.

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Abstract

The invention discloses a method for preparing silver nanoparticles based on poly(2-acrylamino-2-methyl propanesulfonic acid). The method comprises the steps of adding poly(2-acrylamino-2-methyl propanesulfonic acid) to water to prepare emulsion, adding a sodium hypophosphite solution to the emulsion, stirring evenly, and then heating the emulsion, dropwise adding a silver nitrate solution into the emulsion, performing reduction reaction, and then demulsifying, centrifuging, washing and drying to obtain silver nanoparticles. The method is simple and effective and applicable to industrial production, and reaction conditions are easily-controllable; the prepared silver nanoparticles are even in distribution of morphologies and particle sizes, unlikely to gather and extensive in application potentiality in fields of medicine, chemical industry, electronic devices and conductive composite materials, and the like.

Description

technical field [0001] The invention relates to a method for preparing nano-silver particles based on poly(2-acrylamide-2-methylpropanesulfonic acid), belonging to the field of metal nano-materials. Background technique [0002] Nanomaterials are known as important new materials in the 21st century and are one of the current research hotspots. In the field of metal nanomaterials, nano-silver materials have high electrical conductivity, strong bactericidal properties, and catalytic properties. important part. [0003] There are many methods for preparing nano-silver particles. Thermal decomposition, gas condensation, electrochemical, biochemical, and chemical reduction methods are currently used. Among them, the chemical reduction method is one of the simplest and most effective methods. In the chemical reduction method, reducing agents, such as sodium hypophosphite, sodium borohydride, trisodium citrate, etc., are mainly used to reduce the aqueous solution of silver nitra...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 李芝华李彦博
Owner CENT SOUTH UNIV