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Collagen base nano infrared low emissivity colouring pigment and preparing method

A technology of coloring pigments and low emissivity, applied in the field of coloring pigments, can solve the problems of uneven mixing of adhesives and high infrared emissivity, and achieve the effect of reducing infrared emissivity, low infrared emissivity, and not easy to agglomerate

Inactive Publication Date: 2004-12-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To overcome the shortcomings of the existing nano-metal oxide coloring pigments with high infrared emissivity and uneven mixing with adhesives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0010] Example 1, indium oxide nanoparticles produced by sol-gel method, the particle size is about 30nm. 0.8 g of indium oxide nanoparticles were placed in 100 ml of 0.5% collagen aqueous solution, pH 5.3, adsorbed for 24 h., centrifuged, and dried at 40° C. In a four-neck flask, add 60ml of methanol water solution (methanol:water=1:1) and 0.5g of indium oxide particles after absorbing collagen, and vibrate ultrasonically for 5 minutes. Under the protection of nitrogen, the temperature was raised to 50°C, and 0.5mol / L methyl methacrylate monomer and 0.01mol / L cerium ammonium nitrate and 0.01mol / L azobisisobutyronitrile initiator were added or only 0.01mol / L of ammonium cerium nitrate initiator, react for 16h. The reaction product was separated by suction filtration and dried. The dried collagen-methyl methacrylate copolymer-wrapped indium oxide nanoparticles were extracted with acetone to remove the homopolymer. The particle size is 45nm, and the powder infrared emissivit...

example 2

[0011] Example 2, alumina nanoparticles produced by sol-gel method, the particle size is about 40nm. 0.6 g of alumina nanoparticles was placed in 100 ml of 0.6% collagen aqueous solution, the pH of the solution was 5.1, absorbed for 24 hours, centrifuged, and dried at 40°C. In a four-neck flask, add 70 ml of ethanol water solution (ethanol: water = 1.1) and 0.6 g of alumina particles after adsorbing collagen, and vibrate ultrasonically for 6 minutes. Under the protection of nitrogen, the temperature was raised to 50° C., 0.45 mol / L methyl methacrylate monomer and 0.01 mol / L cerium ammonium nitrate initiator were added, and the reaction was carried out for 20 h. The reaction product was separated by suction filtration and dried. The dried product was extracted with acetone to remove homopolymer. The particle size of the aluminum oxide particles wrapped by the collagen-methyl methacrylate copolymer is 60nm, and the infrared emission rate of the powder is 0.52.

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PUM

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Abstract

The collagen base nano coloring pigment with low infrared emissitivity is in core-shell structure with inner core of nano metal oxide coloring pigment and outer collagen grafting copolymer. Collagen molecule is first adsorbed onto the surface of nano pigment particle to modify and stabilize the nano particle, lipophilic grafting branch chain is then introduced to the collagen molecule via solution grafting copolymerization under the action of initiator and the collagen grafting copolymer coats the coloring pigment. The collagen base nano coloring pigment has relatively low infrared emissivity and good dispersivity in organic solvent or water, and it has pigment particle size smaller than 100 nm and outer shell thickness less than 20 nm. It is used in preparing stealth coating and stealth costume and can realize visible light stealth and infrared stealth without damaging radar stealth.

Description

technical field [0001] The present invention relates to the coloring pigments with infrared low emissivity in the 8-14 μm band used in the preparation of infrared stealth coatings, infrared stealth clothing, etc., especially refers to the use of the characteristics of collagen materials to prepare nano-infrared pigments that are well dispersed in organic solvents or water. Low emissivity tinted pigment. Background technique [0002] With the development of various detection technologies, the requirements for infrared stealth coatings or clothing are getting higher and higher, and general stealth coatings must take into account the requirements of visible light and radar wave stealth. In order to hide from visible light, coloring pigments are usually added to the stealth coating. Currently, there are two types of coloring pigments, organic and inorganic. Most of the organic colored pigments have high infrared emissivity, so they are rarely used. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/10
Inventor 周钰明单云曹勇
Owner SOUTHEAST UNIV
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