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Nanofiber airgel with photothermal conversion, sound insulation and heat insulation and good mechanical recovery and preparation method thereof

A nanofiber, photothermal conversion technology, applied in the direction of cellulose/protein conjugated rayon, melt spinning, conjugated synthetic polymer rayon, etc., can solve the complex, high cost and yield of aerogel process. Small and other problems, to achieve the effect of good heat insulation, good mechanical properties, and expand the application field

Active Publication Date: 2021-07-02
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The airgel produced by this method is complicated in process, high in cost and small in output.

Method used

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  • Nanofiber airgel with photothermal conversion, sound insulation and heat insulation and good mechanical recovery and preparation method thereof
  • Nanofiber airgel with photothermal conversion, sound insulation and heat insulation and good mechanical recovery and preparation method thereof
  • Nanofiber airgel with photothermal conversion, sound insulation and heat insulation and good mechanical recovery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] This embodiment discloses a preparation method of nanofiber airgel with functions of light-to-heat conversion, sound insulation and noise reduction, and heat insulation. The specific process is as follows:

[0044] Weigh 142.56kg of isopropanol and 96.04kg of deionized water, mix them uniformly and heat to 80°C; weigh 99kg of EVOH masterbatch with a vinyl content of 44% and 1kg of nano-ZrC powder; weigh the EVOH masterbatch Dissolve the particles in the heated mixture of isopropanol and water and stir to completely dissolve the EVOH; add nano-ZrC powder to the dissolved EVOH solution and emulsify with an emulsifier, so that the nano-ZrC powder is evenly dispersed in the EVOH solution; The prepared mixed solution is slowly poured into ice water and stirred, so that the EVOH mixed with nano-ZrC powder is precipitated; the separated functional EVOH is dried and pulverized with a pulverizer, and the pulverized EVOH is mixed with 400kg of Cellulose acetate butyrate (CAB) is ...

Embodiment 2

[0048] Weigh 142.56kg of isopropanol and 96.04kg of deionized water, mix them evenly and heat to 80°C; weigh 98kg of EVOH masterbatch with a vinyl content of 44% and 2kg of nano-ZrC powder; weigh the EVOH masterbatch Dissolve the particles in the heated mixture of isopropanol and water and stir to completely dissolve the EVOH; add nano-ZrC powder to the dissolved EVOH solution and emulsify with an emulsifier, so that the nano-ZrC powder is evenly dispersed in the EVOH solution; The prepared mixed solution is slowly poured into ice water and stirred, so that the EVOH mixed with nano-ZrC powder is precipitated; the separated functional EVOH is dried and pulverized with a pulverizer, and the pulverized EVOH is mixed with 400kg of Cellulose acetate butyrate (CAB) is mixed evenly and added to the hopper of the twin-screw extruder, melted and blended, wound and collected into bundles. Among them, the temperature settings of each heating zone of the screw are: zone 1: 160°C; zone 2: ...

Embodiment 3

[0052] Weigh 142.56kg of isopropanol and 96.04kg of deionized water, mix them uniformly and heat to 80°C; weigh 97kg of EVOH masterbatch with a vinyl content of 44% and 3kg of nano-ZrC powder; weigh the EVOH masterbatch Dissolve the particles in the heated mixture of isopropanol and water and stir to completely dissolve the EVOH; add ZrC powder to the dissolved EVOH solution and emulsify it with an emulsifier, so that the nano-ZrC powder is evenly dispersed in the EVOH solution; The prepared mixed solution is slowly poured into ice water and stirred to precipitate the EVOH mixed with nano-ZrC powder; dry the precipitated functional EVOH and pulverize it with a pulverizer, and mix the pulverized EVOH with 400kg of acetic acid After the cellulose butyrate (CAB) is mixed evenly, it is added into the hopper of the twin-screw extruder, melted and blended, wound and collected into bundles. Among them, the temperature settings of each heating zone of the screw are: zone 1: 160°C; zon...

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Abstract

The invention discloses a nanofiber airgel with light-to-heat conversion, sound insulation and heat insulation and good mechanical recovery, and belongs to the technical field of functional materials. It is prepared by mixing polyvinyl alcohol-ethylene copolymer and subgroup metal carbide powder through melt spinning and freeze-drying process, wherein the subgroup metal carbide powder is the fourth subgroup metal carbide powder , and its content accounts for 0.5% to 10% of the mass of the nanofiber airgel. The porosity of the nanofiber airgel prepared by the present invention can reach 30% to 60%. 5 times, and under the condition of compressive strain of 70%, it can be compressed ≤1000 times without loss of the material itself. Therefore, the nanofiber airgel designed and prepared by the present invention can be applied in technical fields such as the field of smart clothing, building materials, smart sensing, and automobile manufacturing.

Description

technical field [0001] The invention relates to nanofiber airgel, which belongs to the technical field of functional materials, in particular to a nanofiber airgel with light-to-heat conversion, sound insulation and heat insulation, and good mechanical recovery and a preparation method thereof. Background technique [0002] Airgel is a kind of solid material with nanoporous network structure formed by the coalescence of inorganic or organic molecules. It has the characteristics of nano-scale porous structure and ultra-high porosity, and is one of the solid materials with the smallest density in the world. Because of its low density, low thermal conductivity, high porosity, and large specific surface area, in practical applications, airgel materials have very broad application prospects, and can be used as heat insulation materials, sound insulation and noise reduction materials, catalyst carriers, adsorption materials etc. [0003] At present, airgel is generally inorganic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L1/14C08J9/28D01F8/02D01F8/10D01D5/08
CPCC08J9/28C08J2201/0522C08J2201/0524C08J2329/04C08J2401/14C08J2429/04D01D5/08D01F8/02D01F8/10
Inventor 王栋梅涛赵青华蒋海青李沐芳陈佳慧毛勤岑宋银红尤海宁
Owner JIANGNAN UNIV
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