Flexible calcium lanthanum chromate/silicon oxide composite fiber material with high infrared emissivity as well as preparation method and application of flexible calcium lanthanum chromate/silicon oxide composite fiber material

An infrared emissivity and composite fiber technology, which is applied in the field of high infrared emissivity flexible calcium lanthanum chromate/silicon oxide composite fiber material and its preparation, can solve the problem that infrared radiation nanomaterials cannot be used alone, the preparation method is complicated, and it is difficult to recycle, etc. problems, to achieve the effect of reducing energy consumption, simple operation and easy recovery

Pending Publication Date: 2022-05-31
DONGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a flexible calcium lanthanum chromate / silicon oxide composite fiber material with high infrared emissivity and its preparation method and application, so as to overcome the inability of infrared radiation nanomaterials to be used alone, poor flexibility, and preparation methods in the prior art. Complicated or difficult to recover and other defects

Method used

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  • Flexible calcium lanthanum chromate/silicon oxide composite fiber material with high infrared emissivity as well as preparation method and application of flexible calcium lanthanum chromate/silicon oxide composite fiber material
  • Flexible calcium lanthanum chromate/silicon oxide composite fiber material with high infrared emissivity as well as preparation method and application of flexible calcium lanthanum chromate/silicon oxide composite fiber material
  • Flexible calcium lanthanum chromate/silicon oxide composite fiber material with high infrared emissivity as well as preparation method and application of flexible calcium lanthanum chromate/silicon oxide composite fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Dissolve tetraethyl orthosilicate in the mixed solvent of water and ethanol (the mass ratio of water and ethanol is 1:1), obtain solution A, the concentration of tetraethyl orthosilicate in solution A is 50wt%, stirring speed is 400rpm, the stirring temperature is 26°C, add phosphoric acid while stirring, the mass ratio of phosphoric acid to tetraethyl orthosilicate is 0.01:1. After stirring at room temperature for 8 hours, a uniform inorganic precursor solution A was obtained.

[0055] Add PVA (polyvinyl alcohol) to the inorganic precursor solution A prepared above to obtain solution B. The concentration of PVA in solution B is 1.5wt%, the stirring speed is 500rpm, and the stirring temperature is 80°C. After 3 hours of stirring, a uniform Silica spinning solution.

[0056] Dissolve chromium oxide, lanthanum oxide, and calcium oxide (the molar ratio of chromium oxide, lanthanum oxide, and calcium oxide is 1:0.9:0.1) into a mixed solvent of water, ethanol, and N,N-dimet...

Embodiment 2

[0062] Dissolve tetraethyl orthosilicate in the mixed solvent of water and ethanol (the mass ratio of water and ethanol is 1:1), obtain solution A, the concentration of tetraethyl orthosilicate in solution A is 65wt%, stirring speed is 400rpm, the stirring temperature is 26°C, add phosphoric acid while stirring, the mass ratio of phosphoric acid to tetraethyl orthosilicate is 0.01:1. After stirring at room temperature for 8 hours, a uniform inorganic precursor solution A was obtained.

[0063] Add PVA to the inorganic precursor solution A prepared above to obtain solution B. The concentration of PVA in solution B is 1.8wt%, the stirring speed is 500rpm, and the stirring temperature is 80°C. After 3h stirring, a uniform silica spinning solution.

[0064] Dissolve chromium oxide, lanthanum oxide, and calcium oxide (the molar ratio of chromium oxide, lanthanum oxide, and calcium oxide is 1:0.8:0.2) into a mixed solvent of water, ethanol, and N,N-dimethylformamide (water, The ma...

Embodiment 3

[0070] Compared with Example 2, most of them are the same, except that the volume ratio of silica spinning solution and calcium lanthanum chromate spinning solution is changed to 3:1. The obtained calcium lanthanum chromate / silica composite nanofibrous material such as image 3 As shown, the silica fiber and the calcium lanthanum chromate fiber are interpenetrated and distributed, the silica fiber is continuous, the surface is smooth and flat, and the calcium lanthanum chromate exists in the form of short fibers. The calcium lanthanum chromate fiber diameter in the material is 150nm, the silicon dioxide fiber diameter is 260nm, the fiber softness is 130mN, and the infrared emission rate is 81%.

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Abstract

The invention relates to a high-infrared-emissivity flexible calcium lanthanum chromate / silicon oxide composite fiber material and a preparation method and application thereof.The high-infrared-emissivity flexible calcium lanthanum chromate / silicon oxide composite fiber material is prepared through the following preparation method: (1) dissolving a silicon source and a chelating agent in a solvent A to obtain an inorganic precursor solution A, and then adding a spinning aid polymer to obtain a silicon oxide spinning solution; (2) dissolving a chromium source, a lanthanum source and a calcium source in a solvent B to obtain an inorganic precursor solution B, and then adding a spinning aid polymer to obtain a calcium lanthanum chromate spinning solution; (3) respectively putting the silicon oxide spinning solution and the calcium lanthanum chromate spinning solution into mutually independent spinning propulsion devices, and spinning on the same receiving roller to obtain composite gel nanofibers; and (4) drying and calcining the obtained composite gel nanofiber to obtain a target product. Compared with the prior art, the infrared emissivity of the composite fiber material is larger than 80%, and the composite fiber material can be independently used, and is good in flexibility, excellent in strength, easy to recycle and simple in preparation method.

Description

technical field [0001] The invention belongs to the technical field of infrared radiation energy-saving fibers, and relates to a flexible calcium lanthanum chromate / silicon oxide composite fiber material with high infrared emissivity and its preparation method and application. Background technique [0002] In order to improve the thermal efficiency of industrial high-temperature places and reduce energy consumption, the existing infrared radiation materials are mainly coatings, such as "a high-temperature infrared radiation coating for industrial kilns and its preparation method" (CN201610252233.X), "a high-temperature high-emissivity coating Infrared radiation coating and its preparation method and use method” (CN202110441139.X), “A high-temperature infrared radiation coating and its preparation method and application” (CN201711002425.6), “Preparation of a high-temperature and high-emissivity infrared radiation coating Method" (CN201810980949.0), this kind of material is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/10C04B35/622
CPCC04B35/62231C04B35/6224C04B35/622D01F9/10C04B2235/3241C04B2235/3227C04B2235/3208C04B2235/3418C04B2235/606C04B2235/656C04B2235/6562C04B2235/6567C04B2235/95C04B2235/94Y02P20/10
Inventor 林江山丁彬斯阳郭竑宇俞建勇李淑敏刘峰江旭波韩永祥
Owner DONGHUA UNIV
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