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

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

CN109763374AActive Publication Date: 2019-05-17SHAANXI UNIV OF SCI & TECH
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  • Flexible far infrared heating aramid nano-fiber thin film and preparation method
  • Flexible far infrared heating aramid nano-fiber thin film and preparation method
  • 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

Patent Timeline
17 May 2019
Publication
CN109763374A
IPC
D21H13/26; D21H17/00; D21C9/00
Inventors
张美云; 丁雪瑶