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Flexible yttrium manganate nanofiber membrane with high infrared reflectivity and preparation method thereof

A nanofiber film and infrared reflection technology, which is applied in the fields of fiber chemical characteristics, rayon manufacturing, textiles and papermaking, etc., can solve problems such as insufficient infrared shielding performance, poor fiber continuity, and many single fiber defects, and achieve heat resistance. The effect of poor performance, good flexibility, and high infrared reflectivity

Active Publication Date: 2021-10-15
NANTONG UNIVERSITY
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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 high-infrared reflectivity yttrium manganate nanofiber film and its preparation method, which solves the problem of insufficient infrared shielding performance of existing ceramic fibers, and needs to be added in the current preparation process of yttrium manganate nanofiber Polymers, poor fiber continuity, many single fiber defects and brittle fiber membranes

Method used

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  • Flexible yttrium manganate nanofiber membrane with high infrared reflectivity and preparation method thereof
  • Flexible yttrium manganate nanofiber membrane with high infrared reflectivity and preparation method thereof

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Effect test

Embodiment 1

[0045] A method for preparing a flexible high-infrared reflectance yttrium manganate nanofiber membrane, the specific steps are:

[0046] (1) Dissolve manganese source manganese acetate tetrahydrate, yttrium source yttrium nitrate hexahydrate and heat stabilizer zirconium acetate in solvent water in turn, stir for 30 minutes, then add polyphosphoric acid, heat and stir at 90°C for 60 minutes and mix evenly. The molar ratio of manganese source, yttrium source, heat stabilizer and polyphosphoric acid is 1:1:0.06:0.21, the ratio of the mass sum of manganese source and yttrium source to solvent is 10g:50mL, and the precursor solution has a network The molecular chain of the structure has the following structure:

[0047]

[0048] (2) The above precursor solution was prepared into a precursor fiber film by electrospinning technology. During electrospinning, a heating pack was wrapped outside the syringe. The temperature of the heating pack was 90°C; the process parameters of ele...

Embodiment 2

[0052] A method for preparing a flexible high-infrared reflectance yttrium manganate nanofiber membrane, the specific steps are:

[0053] (1) Dissolve manganese source manganese acetylacetonate, yttrium source yttrium nitrate hexahydrate and heat stabilizer tetrabutyl titanate in the solvent N,N-dimethylformamide in turn, stir for 20min, then add polyphosphoric acid, Heat and stir at 95°C for 80 minutes to mix evenly, wherein the molar ratio of manganese source, yttrium source, heat stabilizer, and polyphosphoric acid in the solution is 1:1:0.03:0.27, and the ratio of the mass sum of manganese source and yttrium source to the mixed solvent 10g:60mL;

[0054] (2) The above precursor solution was prepared into a precursor fiber film by electrospinning technology. During electrospinning, a heating pack was wrapped outside the syringe. The temperature of the heating pack was 85°C; the process parameters of electrospinning were: ambient temperature 30°C ℃, relative humidity 55%, i...

Embodiment 3

[0058] A method for preparing a flexible high-infrared reflectance yttrium manganate nanofiber membrane, the specific steps are:

[0059] (1) Dissolve the manganese source manganese nitrate tetrahydrate, the yttrium source yttrium nitrate hexahydrate and the heat stabilizer ethyl orthosilicate in sequence in the solvent dimethyl sulfoxide, stir for 25 minutes, then add polyphosphoric acid, at 100 ° C Heat and stir for 50min to mix evenly, wherein the molar ratio of manganese source, yttrium source, heat stabilizer and polyphosphoric acid in the solution is 1:1:0.04:0.15, and the ratio of the mass sum of manganese source and yttrium source to the solvent is 10g:70mL ;

[0060] (2) The above precursor solution was prepared into a precursor fiber film by electrospinning technology. During electrospinning, a heating pack was wrapped outside the syringe. The temperature of the heating pack was 80°C; the process parameters of electrospinning were: ambient temperature 24 ℃, relative...

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Abstract

The invention relates to a flexible yttrium manganate nanofiber membrane with high infrared reflectivity and a preparation method thereof. The membrane is prepared from a manganese source, a yttrium source, a heat stabilizer, polyphosphoric acid and a solvent. The preparation method comprises the steps of firstly, preparing a precursor solution containing the manganese source, the yttrium source, the heat stabilizer, the polyphosphoric acid and the solvent; then preparing the precursor solution into precursor fibers by adopting an electrostatic spinning technology, and wrapping an injector with a heating bag during electrostatic spinning; and finally, calcining the precursor fiber membrane in an air atmosphere to obtain the flexible yttrium manganate nanofiber membrane. The method provided by the invention effectively solves the ubiquitous problems of high brittleness and easy breakage of a current yttrium manganate nanofiber membrane, and obviously improves the infrared shielding performance of a ceramic fiber material, so that the finally prepared flexible yttrium manganate nanofiber membrane with high infrared reflectivity has the advantages of low solid thermal conductivity, high infrared reflectivity, high structural stability and the like, and has good practical value and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a flexible high-infrared reflectance yttrium manganate nanofiber film and a preparation method thereof. Background technique [0002] Ceramic fiber materials have the advantages of good high temperature resistance, strong oxidation resistance, good mechanical vibration resistance, excellent thermal stability and chemical stability, etc. field has a wide range of applications. Existing ceramic fibers are generally on the order of microns. When the diameter is further refined to the order of nanometers, the pore size between the fibers can be significantly reduced, the restriction on the movement of gas molecules can be increased, and the thermal conductivity of the gas can be effectively reduced. However, the infrared reflectivity of current ceramic fiber insulation materials is generally low, resulting in insufficient ability to isolate radiation heat transfer under high tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4209D04H1/4382D01F9/08D01F1/10
CPCD04H1/4209D04H1/43838D01F9/08D01F1/10
Inventor 单浩如傅秋霞刘其霞张伟季涛高强张瑜
Owner NANTONG UNIVERSITY
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