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A flexible far-infrared heating aramid fiber nanofiber film and its preparation method

A far-infrared heating and nanofiber technology, which is applied in non-fiber pulp addition, fiber raw material processing, cellulose pulp post-processing, etc., can solve the problems of easy agglomeration and difficult dispersion, and achieves promotion of dispersion, stable heating performance, and improved products. Grade effect

Active Publication Date: 2021-04-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unique tubular structure of carbon nanotubes, it has a large aspect ratio and specific surface area, and has good mechanical properties, chemical stability, excellent electrical conductivity and thermal conductivity, but it is extremely easy to agglomerate and difficult to disperse

Method used

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  • A flexible far-infrared heating aramid fiber nanofiber film and its preparation method
  • A flexible far-infrared heating aramid fiber nanofiber film and its preparation method
  • A flexible far-infrared heating aramid fiber nanofiber film and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Step (1): Stir the carbon nanotube A in a mixed solution of concentrated sulfuric acid and concentrated nitric acid at a certain temperature, the stirring speed is 500 rpm, the temperature is 60°C, and the mass ratio of concentrated sulfuric acid to concentrated nitric acid is 3:1 to obtain uniformly dispersed modified Carbon nanotube solution B;

[0041] Step (2): The para-aramid nanofiber solution in the DMSO / KOH system is stirred at a stirring speed of 800rpm, and deionized water is injected into it under high pressure to obtain a solution dispersed in DMSO / KOH / H 2 Para-aramid fiber nanofiber solution C in O mixed system;

[0042] Step (3): Wash the para-aramid nanofiber solution C in the mixed system obtained in (2) with deionized water and ethanol under vacuum filtration until it becomes colloidal, and then disperse it in deionized water to obtain a solution dispersed in water The para-aramid nanofiber solution D;

[0043] Step (4): Phosphoric acid is added to th...

Embodiment 2

[0047] Step (1): Stir carbon nanotube A in a mixed solution of concentrated sulfuric acid and concentrated nitric acid at a certain temperature, the stirring speed is 700rpm, the temperature is 50°C, and the mass ratio of concentrated sulfuric acid to concentrated nitric acid is 1:1, and a uniformly dispersed modified Carbon nanotube solution B;

[0048] Step (2): The para-aramid nanofiber solution in the DMSO / KOH system is stirred at a stirring speed of 1000rpm, and deionized water is injected into it under high pressure to obtain a solution dispersed in DMSO / KOH / H 2 Para-aramid fiber nanofiber solution C in O mixed system;

[0049] Step (3): Wash the para-aramid nanofiber solution C in the mixed system obtained in (2) with deionized water and ethanol under vacuum filtration until it becomes colloidal, and then disperse it in deionized water to obtain a solution dispersed in water The para-aramid nanofiber solution D;

[0050] Step (4): Phosphoric acid is added to the solut...

Embodiment 3

[0054] Step (1): Stir the carbon nanotubes A in a mixed solution of concentrated sulfuric acid and concentrated nitric acid at a certain temperature, the stirring speed is 500 rpm, the temperature is 40°C, the mass ratio of concentrated sulfuric acid to concentrated nitric acid is 1:1, and a uniformly dispersed modified Carbon nanotube solution B;

[0055] Step (2): The para-aramid nanofiber solution in the DMSO / KOH system is stirred at a stirring speed of 900rpm, and deionized water is injected into it under high pressure to obtain a solution dispersed in DMSO / KOH / H 2 Para-aramid fiber nanofiber solution C in O mixed system;

[0056] Step (3): Wash the para-aramid nanofiber solution C in the mixed system obtained in (2) with deionized water and ethanol under vacuum filtration until it becomes colloidal, and then disperse it in deionized water to obtain a solution dispersed in water The para-aramid nanofiber solution D;

[0057] Step (4): Phosphoric acid is added to the solu...

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Abstract

The invention discloses a flexible far-infrared heating aramid fiber nanofiber film and a preparation method thereof. The flexible far-infrared fiber film is obtained by uniformly dispersing carbon nanotubes with nanoscale structure, excellent mechanical properties and electrical properties and aramid nanofibers with excellent mechanical properties. Infrared heating aramid nanofiber film, giving full play to the excellent film-forming properties of aramid nanofibers, and the advantages of their abundant functional groups on the surface that are easy to produce a strong network cross-linking structure, synergistically improving the dispersion performance and film-forming of carbon nanotubes Performance, the development of aramid nanocellulose-based new materials with both flexibility and conductivity, and low-temperature and far-infrared heating properties has improved the uneven heating surface of current flexible heating materials, excessive temperature differences, unstable heating performance, and low service life. Improve product grades to meet the application requirements of electrothermal physiotherapy functional clothing, intelligent physiotherapy safety clothing, and medical far-infrared treatment cabins.

Description

technical field [0001] The invention relates to a conductive heating film, in particular to a flexible far-infrared heating aramid fiber nanofiber film and a preparation method thereof. Background technique [0002] At present, far-infrared conductive heating products are developing rapidly, and are mainly used in electrothermal physiotherapy functional clothing, intelligent physiotherapy safety clothing, and medical far-infrared treatment cabins. However, there are many defects in the industrialized products made of it, mainly in: the surface of the heating material generates unevenly, the temperature difference is too large, the heating performance is unstable, the service life is low, and the surface leakage current of the finished electric heating material is too large , These defects make the product quality questioned by consumers, but also bring great safety hazards. [0003] The manufacturing process of existing far-infrared power generation products is mainly to im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/26D21H17/00D21C9/00
Inventor 张美云丁雪瑶杨斌王琳宋顺喜谭蕉君聂景怡罗晶晶
Owner SHAANXI UNIV OF SCI & TECH
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