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Nano-particle compound and preparation method thereof

A nanoparticle and inorganic nanoparticle technology, which is applied in the field of nanoparticle composites and its preparation, can solve the problems of loss and limitation of the application of metal nanoparticles, and achieve good weather resistance, simple operation steps, and broad application prospects.

Inactive Publication Date: 2008-08-27
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These properties of metal nanoparticles are based on their small size. However, metal nanoparticle systems usually have high specific surface energy, and with the environment of metal nanoparticles such as temperature, pH, ionic strength Due to changes in factors such as storage time and storage time, nanoparticles are very easy to aggregate. Once aggregation occurs, the metal nanoparticle system loses many of the unique properties of the nanoparticle system, thus limiting the application of metal nanoparticles.

Method used

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  • Nano-particle compound and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1) Preparation of isopropylacrylamide and acrylic acid copolymer hydrogel microspheres with a crosslink density of 4.5wt.-%:

[0026] Add 20 milliliters of water, 0.176 grams of isopropylacrylamide, and 4.5wt.-% methylenebisisopropylacrylamide with a quality of isopropylacrylamide in a 100 milliliter three-necked bottle equipped with a stirrer and a thermometer. Amide, 10 μL (0.01 g) of acrylic acid, stirred and filled with nitrogen for 30 minutes of oxygen removal, heated to 70 ° C, dissolved 0.004 g of ammonium persulfate in 5 ml of water and added to the above solution, and reacted for 4 hours under the protection of nitrogen. The resulting solution was dialyzed in deionized water for two weeks, then centrifuged (10000 rpm), poured out the upper layer liquid, added water to dissolve and centrifuged, and repeated the above operation three times to obtain a cross-linking density of 4.5wt.-%. Acrylamide-acrylic acid copolymer hydrogel microspheres.

[0027] 2) Preparat...

Embodiment 2

[0032] 1) Preparation of isopropylacrylamide and acrylic acid copolymer hydrogel microspheres with a crosslink density of 10wt.-%:

[0033] Add 20 milliliters of water, 0.176 grams of isopropylacrylamide, and 10 wt.-% methylene bisisopropylacrylamide in a 100 milliliter three-necked bottle equipped with a stirrer and a thermometer , 10 μL (0.01 g) of acrylic acid, stirred and filled with nitrogen for 30 minutes of oxygen removal, heated to 70 ° C, dissolved 0.004 g of ammonium persulfate in 5 ml of water and added to the above solution, and reacted for 4 hours under nitrogen protection. Dialyze the resulting solution in deionized water for two weeks, then centrifuge (10000 rpm), pour out the upper layer liquid, add water to dissolve and centrifuge, and repeat the above operation three times to obtain isopropyl with a crosslinking density of 10wt.-%. Acrylamide and acrylic acid copolymer hydrogel microspheres.

[0034] 2) Preparation of ferric oxide nanoparticles:

[0035] Wi...

Embodiment 3

[0039] 1) Preparation of isopropylacrylamide and acrylic acid copolymer hydrogel microspheres with a crosslink density of 15wt.-%:

[0040] Add 20 milliliters of water, 0.176 grams of isopropylacrylamide, and the methylenebisisopropylacrylamide whose quality is 15wt.-% of the mass of isopropylacrylamide in a 100 milliliter three-necked bottle equipped with a stirrer and a thermometer , 10 μL (0.01 g) of acrylic acid, stirred and filled with nitrogen for 30 minutes of oxygen removal, heated to 70 ° C, dissolved 0.004 g of ammonium persulfate in 5 ml of water and added to the above solution, and reacted for 4 hours under nitrogen protection. The resulting solution was dialyzed in deionized water for two weeks, then centrifuged (10000 rpm), poured out the upper liquid, dissolved in water and centrifuged, and repeated the above operation three times to obtain a cross-linking density of 15wt.-%. Acrylamide and acrylic acid copolymer hydrogel microspheres.

[0041] 2) Preparation o...

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Abstract

The invention discloses a nano particle compound and a preparation process thereof. The nano particle compound which is provided by the invention is formed by aquogel microsphere and inorganic nano particles, wherein the inorganic nano particles are jogged in the aquogel microsphere, the aquogel microsphere is isopropyl acrylamide and acroleic acid copolymer aquogel microsphere. The preparation process of nano particle compound comprises following steps that firstly preparing isopropyl acrylamide and acroleic acid copolymer aquogel microsphere, and dispersing aquogel microsphere into water, and dispersing inorganic nano particles into water, secondly mixing two kinds water solution which are obtained in first step, wherein the mass ratio of isopropyl acrylamide and acroleic acid copolymer aquogel microsphere and inorganic nano particle in mixing solution is 1:10-1:20, stirring mixing solution for 5-10 minutes under the conditions of temperature is 25-35 DEG C, and pH is 5-7, thereby obtaining nano particle compound.

Description

technical field [0001] The invention relates to a nanoparticle composite and a preparation method thereof. Background technique [0002] Metal nanoparticles have quantum size effect, surface interface effect, volume effect and macroscopic quantum tunneling effect, so that they have unique thermal, electrical, magnetic and optical properties, so they can be used in many fields such as biosensing, catalysis, optoelectronic devices and magnetic storage. etc. have a very wide range of applications. These properties of metal nanoparticles are based on their small size. However, metal nanoparticle systems usually have high specific surface energy, and with the environment of metal nanoparticles such as temperature, pH, ionic strength With changes in factors such as storage time and storage time, nanoparticles are very easy to aggregate. Once aggregation occurs, the metal nanoparticle system loses many of the unique properties of the nanoparticle system, thus limiting the applicat...

Claims

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Application Information

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IPC IPC(8): C08L33/24C08K3/22C08K3/30C08K3/08C08J3/215
Inventor 姚建年马颖董阳
Owner INST OF CHEM CHINESE ACAD OF SCI
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