Polyamide aerogel fibers and preparation method and application thereof

A polyamide gel fiber and aerogel fiber technology, which is applied in the directions of single-component polyamide rayon, fiber processing, filament/thread forming, etc., can solve the problem of few types and limited application fields of aerogel fibers, etc. problem, to achieve the effect of high porosity, excellent spinnability, and low thermal conductivity

Active Publication Date: 2019-11-19
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Airgel fibers that have appeared at present include graphene oxide airgel fibers, graphene airgel fibers, titanium oxide airgel fibers, cellulose airgel fibers and polyvinylidene fluoride airgel fibers, etc., but the types Still relatively few, and the application fields of obtained airgel fibers are still limited

Method used

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  • Polyamide aerogel fibers and preparation method and application thereof
  • Polyamide aerogel fibers and preparation method and application thereof
  • Polyamide aerogel fibers and preparation method and application thereof

Examples

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preparation example Construction

[0034] Another aspect of the embodiments of the present invention also provides a method for preparing the aforementioned polyamide airgel fiber, which includes:

[0035] (1) Provide polyamide spinning solution;

[0036] (2) prepare polyamide gel fiber with polyamide spinning solution;

[0037] (3) performing special drying treatment on the polyamide gel fiber to obtain polyamide airgel fiber.

[0038] Wherein, in a more specific typical implementation case, the preparation method includes:

[0039] (1) Select a suitable polyamide material, synthesize or dissolve it to prepare a spinning solution, preferably, the polyamide material used can be dissolved in a certain solvent;

[0040] (2) obtaining the polyamide gel fiber by the polyamide spinning solution through spinning technology;

[0041] (3) The polyamide gel fiber is placed in a solvent of a certain proportion, and the solvent is replaced with an alcohol gel fiber or a hydrogel fiber; the above polyamide gel fiber is ...

Embodiment 1

[0066] (1) Select poly-p-phenylene terephthalamide fibers and an equal amount of KOH to be dissolved in DMSO as spinning solution;

[0067] (2) Extruding the spinning solution into a 30% DMSO aqueous solution through a syringe pump to form a polyamide gel fiber, the spinneret hole diameter is 300 μm, and the draft ratio is 0.9;

[0068] (3) Carry out solvent replacement to above-mentioned polyamide gel fiber, replacement solvent is deionized water;

[0069] (4) After the above-mentioned hydrogel fibers were frozen at -12°C for 8 hours, they were placed in a vacuum freeze dryer and dried until no solvent components existed in the fibers. figure 1 Show the SEM photo of the polyamide airgel fiber gained in the present embodiment, figure 2 The TG curve of the polyamide airgel fiber obtained in this example is shown. For other parameters, please refer to Table 1.

Embodiment 2

[0071] (1) Select poly-p-phenylene terephthalamide fibers and an equal amount of KOH to be dissolved in DMSO as spinning solution;

[0072] (2) Extruding the spinning solution into a 30% DMSO aqueous solution through a syringe pump to form a polyamide gel fiber, the spinneret hole diameter is 300 μm, and the draft ratio is 0.9;

[0073] (3) Carry out solvent replacement to above-mentioned polyamide gel fiber, replacement solvent is cyclohexane;

[0074] (4) After freezing the above-mentioned hydrogel fibers at -12° C. for 8 hours, put them into a vacuum freeze dryer, and dry them until no solvent component exists in the fibers. image 3 The SEM photos of the polyamide airgel fibers obtained in this example are shown, and other parameters are shown in Table 1.

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Abstract

The invention discloses polyamide aerogel fibers and a preparation method and application thereof. The polyamide aerogel fibers have a communicated three-dimensional porous network structure, and thethree-dimensional porous network structure is formed by overlapping a polyamide nanostructure. The preparation method includes the following steps: providing a polyamide spinning solution, preparing polyamide gel fibers by adopting a gel spinning method, a wet spinning method, a dry spinning method, a 3D printing method and the like, and drying the polyamide gel fibers to obtain the polyamide aerogel fibers. The polyamide aerogel fibers disclosed by the invention have the unique three-dimensional porous network structure, extremely low thermal conductivity, higher porosity, certain spinnability, and excellent skeleton structure stability, and can be applied to the fields of textile and the like In addition, the obtained polyamide aerogel fibers can fill different functional materials without affecting the stability of a skeleton material, and have great application prospects.

Description

technical field [0001] The invention relates to a novel functional fiber, in particular to a polyamide airgel fiber and its preparation method and application, belonging to the technical field of nanoporous materials and functional fibers. Background technique [0002] Fiber materials have a long history. Since 5000 BC, humans have used natural fibers such as cotton and linen. Since the birth of synthetic fibers in the early nineteenth century, due to its advantages such as controllable structure and design of components, the development of fiber materials has been greatly promoted, and the types of fibers have continued to increase. Differential fibers, high-performance fibers, functional fibers and Smart fibers and many more different types of fibers. After decades of development, the structure of fiber materials has gradually become more complex. From the initial single solid fiber, different shapes such as special-shaped fibers and ultra-fine fibers have been developed....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/90D01D5/247
CPCD01F6/90D01D5/247Y02P20/54
Inventor 张学同刘增伟
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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