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Flexible far infrared heating aramid nano-fiber thin film and preparation method

A far-infrared heating and nanofiber technology, which is applied in the direction of non-fibrous pulp addition, fiber raw material treatment, cellulose pulp post-treatment, etc., can solve the problems of difficult dispersion and easy agglomeration, and achieve the promotion of dispersion, stable heating performance and improved dispersion Effects of properties and film-forming properties

Active Publication Date: 2019-05-17
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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  • Flexible far infrared heating aramid nano-fiber thin film and preparation method
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  • Flexible far infrared heating aramid nano-fiber thin film and preparation method

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Experimental program
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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 nano-fiber thin film and a preparation method. The flexible far infrared heating aramid nano-fiber thin film is prepared by uniformly dispersing carbon nanotubes with a nano-scale structure and excellent mechanical properties and electric properties and aramid nano-fibers with excellent mechanical properties, and the film forming performance of the aramid nano-fibers and the advantages that a strong network crosslinking structure is easily generated by abundant functional groups on the surfaces of the aramid nano-fibers are sufficiently expressed; the dispersion performance and film forming performance of the carbon nanotubes are cooperatively improved and an aramid nanocellulose based novel material with flexibility, conductivity and low-temperature far infrared heating performance is developed; the problems of a current flexible heating material that the surface is not uniformly heated, the temperature different is too great, the heating performance is not stable and the service life is relatively low are improved, and the product grade is improved; and the flexible far infrared heating aramid nano-fiber thin film canmeet the requirements of application to electric heating physiotherapy functional clothing, intelligent physiotherapy safety clothing, medical far infrared therapy chambers and the like.

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 Applications(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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