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Thin-film material with double-effect functions of heat absorption and wave absorption and preparation method thereof

A technology of film materials and wave-absorbing materials, which is applied in the fields of rayon manufacturing, filament/thread forming, fiber chemical characteristics, etc., can solve problems such as easy leakage and large volume change, so as to solve leakage problems and broaden the application field , good cycle stability

Pending Publication Date: 2021-12-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic phase change materials have disadvantages such as large volume change and easy leakage during the solid-liquid phase transition process.

Method used

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  • Thin-film material with double-effect functions of heat absorption and wave absorption and preparation method thereof
  • Thin-film material with double-effect functions of heat absorption and wave absorption and preparation method thereof
  • Thin-film material with double-effect functions of heat absorption and wave absorption and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A thin film material with double-effect functions of heat absorption and wave absorption, the specific preparation method is as follows:

[0034] (1) Configuration of core spinning solution

[0035] Take 5 g of PEG with a relative molecular mass of 300,000 and mix it with 10 ml of deionized water, stir at room temperature for 3 hours and mix well to obtain a colorless and transparent liquid, which is the core spinning solution.

[0036] (2) Configuration of shell spinning solution

[0037] Dissolve 0.6g of PVA in 10ml of deionized water, and add 0.1g of Fe 3 O 4 The nanoparticles are mixed, stirred at 90°C for 4 hours, fully mixed, and cooled to room temperature to obtain the shell spinning solution.

[0038] (3) Preparation of composite phase change film materials by electrospinning

[0039] Add the spinning solution prepared in step (1) and step (2) to a 10ml syringe respectively, connect it to a special coaxial needle, set the receiving distance to 15cm, the posi...

Embodiment 2

[0041] (1) Configuration of core spinning solution

[0042] Take 5 g of PEG with a relative molecular mass of 200,000 and mix it with 10 ml of deionized water, stir at room temperature for 3 hours and mix well to obtain a colorless and transparent liquid, which is the core spinning solution.

[0043] (2) Configuration of shell spinning solution

[0044] Dissolve 1g of sodium alginate in 10ml of deionized water, add 0.5g of NiO nanoparticles and mix, stir at 90°C for 4 hours to fully mix, cool to room temperature to obtain the shell spinning solution.

[0045] (3) Preparation of composite phase change materials by electrospinning

[0046] Add the spinning solution prepared in step (1) and step (2) to a 10ml syringe respectively, connect it to a special coaxial needle, set the receiving distance to 15cm, the positive high voltage to 18kv, and the negative high voltage to -2.5kv , the drum is covered with a layer of aluminum foil, the aluminum foil indicates that it is cleaned ...

Embodiment 3

[0048] (1) Configuration of core spinning solution

[0049] Take 5 g of PEG with a relative molecular mass of 10000 and mix it with 10 ml of deionized water, stir at room temperature for 3 hours and mix well to obtain a colorless and transparent liquid, which is the core spinning solution.

[0050] (2) Configuration of shell spinning solution

[0051] Dissolve 0.6g of sodium carboxymethylcellulose in 10ml of deionized water, and add 0.1g of CoFe 2 O 4 The nanoparticles were mixed, and stirred at room temperature for 4 hours to fully mix and evenly obtain the shell spinning solution.

[0052] (3) Preparation of composite phase change materials by electrospinning

[0053] Add the spinning solution prepared in step (1) and step (2) to a 10ml syringe respectively, connect it to a special coaxial needle, set the receiving distance to 15cm, the positive high voltage to 18kv, and the negative high voltage to -2.5kv , the drum is covered with a layer of aluminum foil, the aluminum...

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Abstract

The invention discloses a thin-film material with double-effect functions of heat absorption and wave absorption and a preparation method thereof. The composite thin-film material takes water-soluble macromolecules such as polyvinyl alcohol (PVA), sodium cellulose and gelatin as a shell layer, takes a phase change material polyethylene glycol (PEG) as a core layer, takes magnetic nanoparticles such as metals (Fe, Co and Ni), metal alloys (FeCo) and metal oxides (Fe3O4, NiO and CoFe2O4) as wave-absorbing fillers, and the composite thin-film material is prepared by a coaxial electrostatic spinning method. The thin-film material with the double-effect functions of heat absorption and wave absorption has the advantages that water is used as a spinning solvent, the prepared fiber is of a core-shell structure, the problem that leakage is prone to occurring when the phase change core layer is subjected to solid-liquid phase transition is solved, and the content of the phase change core layer is high. In addition, magnetic nanoparticles have high magnetic loss tangent angles and can be used for absorption and attenuation of electromagnetic waves. Therefore, the prepared composite film material has the advantages of green and environment-friendly preparation process, high phase change latent heat, good electromagnetic wave absorption performance, stable recycling performance and the like, and can simultaneously meet the multifunctional application requirements of heat absorption / wave absorption of the thin-film material.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a thin film material with double-effect functions of heat absorption and wave absorption and a preparation method thereof, which can be used as heat and wave absorbing materials for electronic equipment. Background technique [0002] With the rapid development of science and technology, the development of electronic equipment has the characteristics of miniaturization, high integration and high power. But this also brings a series of problems. Due to the gradual miniaturization of equipment, the traditional heat dissipation method is less effective, which makes it difficult to dissipate heat from equipment. At the same time, as the degree of integration of the equipment increases, its functions and power gradually increase, which will inevitably greatly increase the heat output of the equipment. On the other hand, with the rapid development of communicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00D01D5/34D01F8/10D01F8/16D01F1/10D01F1/02
CPCD04H1/728D01D5/0015D01D5/34D01F8/10D01F8/16D01F1/10D01F1/02
Inventor 宋少坤吕林达艾红董丽杰
Owner WUHAN UNIV OF TECH
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