Aerogel fiber as well as preparation method and application thereof

An aerogel fiber, aerogel technology, applied in the field of aerogel, to achieve the effect of protecting integrity and simple process

Active Publication Date: 2020-09-04
FOSHAN GREEN INTELLIGENT MFG RES INST OF XIANGTAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to provide an airgel fiber and its preparation method and application for the problem of how to protect the integrity of the airgel from external damage

Method used

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  • Aerogel fiber as well as preparation method and application thereof
  • Aerogel fiber as well as preparation method and application thereof
  • Aerogel fiber as well as preparation method and application thereof

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preparation example Construction

[0094] See figure 2 , the preparation method of the airgel fiber of one embodiment of the present invention, comprises the steps:

[0095] S10. Prepare a hollow fiber containing liquid inside by coaxial wet spinning.

[0096] Among them, the operation of preparing the hollow fiber containing liquid inside by coaxial wet spinning is:

[0097] The main spinning polymer is mixed with a solvent as the outer layer solution, and the liquid is used as the inner layer solution, and wet spinning is carried out in a liquid bath, and then impurities are removed to obtain a hollow fiber with a liquid inside.

[0098] Wherein, the impurities are solvents or other substances doped in the main spinning polymer.

[0099] S20, removing the liquid inside the hollow fiber to obtain a hollow fiber template.

[0100] Preferably, the operation of removing the liquid inside the hollow fiber is:

[0101] The hollow fibers are frozen and then freeze-dried; or air-dried at room temperature. Differ...

Embodiment 1

[0135] Preparation of cellulose fibers (CNFs): 1 g of rice straw (such as Figure 4 Shown) the cellulose in the alkaline solution of Ph=10.0 containing 0.016g TEMPO / 0.1gNaBr / 5mmol NaClO, by centrifugation and dialysis. The mixing speed is 37,00 rpm for 30 minutes; the centrifugation speed is 5,000 rpm for 15 minutes. The centrifuged supernatant was rotary evaporated to 0.7 wt% in a rotary evaporator, and stored at 4°C for future use.

[0136] Preparation of CA / PAA-coated airgel fibers:

[0137] In the wet spinning process, the hollow fiber first uses cellulose acetate (CA) as the main spinning polymer, and at the same time, polyacrylic acid (PAA) with a molecular weight of 4000kDa is added to CA, and dimethylacetamide (DMAc) is used as the solvent. , water fills the central channel.

[0138] Extrude 16wt% CA / PAA (23:2w / w) dissolved in DMAc into the water bath, the water inside and outside the hollow fiber can extract DMAc, and the phase change occurs simultaneously on the i...

Embodiment 2

[0152] Preparation of cellulose fibers (CNFs): 1 g of cellulose from rice straw was decomposed by centrifugation and dialyzed in an alkaline solution of Ph=10.0 containing 0.016 g TEMPO / 0.1 g NaBr / 5 mmol NaClO. The mixing speed is 37,00 rpm for 30 minutes; the centrifugation speed is 5,000 rpm for 15 minutes. The centrifuged supernatant was rotary evaporated to 0.7 wt% in a rotary evaporator, and stored at 4°C for future use.

[0153] Preparation of airgel precursor solution: 5.5 g of PEDOT / PSS solution (mass fraction 1.1 wt%) was added to 2.0 g of distilled water, and stirred at high speed for 30 min until uniformly dispersed, thereby preparing a mass fraction of 0.7% PEDOT / PSS dispersion. In order to obtain a PEDOT / PSS / CNF dispersion with a mass fraction of 0.7 wt%, add 5.5 g of PEDOT / PSS solution and CNF solution with equal mass fractions of 0.7 wt%, and stir at high speed for 30 minutes until the dispersion is uniform.

[0154] Preparation of TPE-coated conductive airgel fi...

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Abstract

The invention relates to an aerogel fiber as well as a preparation method and an application thereof. The aerogel fiber comprises an aerogel core layer and a polymer coating layer, the polymer coatinglayer is of a porous structure, and the outer side of the aerogel core layer is coated with the polymer coating layer. According to the aerogel fiber in the technical scheme, the polymer coating layer of the porous structure plays a role in protecting the aerogel core layer located on the inner side, so that the integrity of aerogel can be protected against damage of external force, and wide application is facilitated. In addition, the invention also relates to a preparation method of the aerogel fiber, and an application of the aerogel fiber in a building thermal insulation material, wearable equipment and a water-soluble coating.

Description

technical field [0001] The invention relates to the technical field of airgel, in particular to an airgel fiber, a preparation method and application thereof. Background technique [0002] Airgel is the least dense material with a density close to that of air, and it is also a porous material with a porosity of more than 99%, so these properties are the most unique among many potential applications. [0003] The MarketResearch.biz website recently published a report titled "Global Airgel Market by Application (Oil & Gas, Construction, Automotive & Aerospace, Healthcare, Performance Coatings, Chemicals, Electronics, and Others), Form, Type, Process Type, and Region - Global Forecast to 2026" research report. According to the report, the global airgel market was valued at US$512.9 million in 2016. With a compound annual growth rate of 31.8% from 2017 to 2026, the global airgel market is expected to reach US$8.0837 billion in 2026. [0004] Airgel materials are an ideal alter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/02
CPCC04B30/02C04B24/383C04B24/26C04B24/124
Inventor 周剑范俊呈易明松
Owner FOSHAN GREEN INTELLIGENT MFG RES INST OF XIANGTAN UNIV
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