Preparation method of cellulose/carbon nanotube composite fiber

A carbon nanotube composite and carbon nanotube technology, which is applied in the field of composite fibers, can solve problems such as low efficiency and inability to apply industrial production, and achieve high thermal ablation residual carbon rate, high high temperature modulus retention rate, and excellent mechanical properties Effect

Active Publication Date: 2017-02-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have the problem of low efficiency and cannot be applied to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of cellulose / carbon nanotube composite fiber, comprising the following steps:

[0032] Using cellulose solvent N-methylmorpholine-N-oxide (NMMO) / water (wherein the proportion of water is 13.8wt%) to dissolve low-polymerization degree cellulose with a degree of polymerization of 200, the low-polymerization degree fiber is prepared The carrier solution of single-walled carbon nanotubes with an element concentration of 6 wt%; then the single-walled carbon nanotubes with a purity of 90.1%, a diameter of 0.75 nm, and a length of 1 μm are mixed with the carrier solution using a screw extruder. The speed was 100 rpm, the stirring time was 0.5 hours, and the mass ratio of low-polymerization degree cellulose to single-walled carbon nanotubes was 1:1 to obtain the carbon nanotube mother liquor; The method is injected into the cellulose spinning solution with a polymerization degree of 500 and a concentration of 6 wt%, specifically adding a carbon nanotube mot...

Embodiment 2

[0035] A preparation method of cellulose / carbon nanotube composite fiber, comprising the following steps:

[0036] Using cellulose solvent N-methylmorpholine-N-oxide (NMMO) / water (in which the proportion of water is 13.4wt%) to dissolve low-polymerization degree cellulose with a degree of polymerization of 500, the low-polymerization degree fiber is prepared The carrier solution of single-walled carbon nanotubes with a concentration of 15 wt%; then the single-walled carbon nanotubes with a purity of 90.5%, a diameter of 3 nm, and a length of 5 μm are mixed with the carrier solution by a kneader, and the stirring speed is 300 rpm / min, the stirring time was 1 hour, and the mass ratio of low-polymerization degree cellulose to single-walled carbon nanotubes was 9:1 to prepare carbon nanotube mother liquor; finally, the carbon nanotube mother liquor was injected into the polymerization degree by online addition. is 1500 and the concentration is 15wt% of the cellulose spinning solu...

Embodiment 3

[0039] A preparation method of cellulose / carbon nanotube composite fiber, comprising the steps of:

[0040] Using cellulose solvent 1-butyl-3-methylimidazolium chloride salt to dissolve cellulose with a low degree of polymerization of 300 to prepare a carrier solution of single-walled carbon nanotubes with a concentration of cellulose with a low degree of polymerization of 7% by weight; then The single-walled carbon nanotubes with a purity of 90.8%, a diameter of 1nm, and a length of 2μm are mixed with the carrier solution using a screw extruder, wherein the stirring rate is 200 rpm, the stirring time is 0.6 hours, and the degree of polymerization is low. The mass ratio of cellulose to single-walled carbon nanotubes is 10:1, and the carbon nanotube mother liquor is prepared; finally, the carbon nanotube mother liquor is injected into the cellulose spinning solution with a degree of polymerization of 600 and a concentration of 8wt% in the form of online addition. Specifically, ...

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Abstract

The invention relates to a preparation method of a cellulose/carbon nanotube composite fiber. The preparation method comprises the steps that a cellulose solvent is adopted to dissolve a low-polymerization-degree cellulose, and a carrier solution for carbon nanotubes is prepared; under the strong shear effect provided by a stirring device, the carbon nanotubes is mixed with the carrier solution to prepare a carbon nanotube mother solution; the carbon nanotube mother solution is injected into a cellulose spinning solution in an online adding mode, the spinning solution is subjected to extrusion, solidification and drawing to prepare the cellulose/carbon nanotube composite fiber. For solving the problem that the carbon nanotubes are difficultly and uniformly mixed with a high-viscosity spinning solution, the carbon nanotube mother solution is injected into the cellulose spinning solution, and further the cellulose/carbon nanotube composite fiber is prepared in a spin-forming mode. The mother solution carrier used by the method solidifies and is formed with the fiber without the operation of feeding an additional additive into a solvent and coagulation bath system. The preparation method is simple, flexible and efficient, and production of the cellulose/carbon nanotube composite fiber can be achieved based on a conventional production line.

Description

technical field [0001] The invention relates to the field of composite fibers, in particular to a preparation method of cellulose / carbon nanotube composite fibers. Background technique [0002] Carbon nanotubes are one-dimensional nanomaterials that can be used to improve the mechanical, thermal and electrical properties of regenerated cellulose fibers. Chinese patent ZL200710036886.5 introduces the preparation method of cellulose / carbon nanotube composite fibers. Carbon nanotubes are dispersed in an aqueous solution of N-methylmorpholine-N-compound, and then mixed with cellulose pulp to obtain fibers. The cellulose / carbon nanotube composite fiber is prepared by extruding and coagulating the spinning solution. Chinese patent ZL201010589210.0 mixes a certain proportion of carbon nanotubes, carbon black and ionic liquid, and then dissolves cellulose pulp to obtain a cellulose composite spinning solution, and prepares cellulose / carbon by dry spray wet spinning method Nanotube...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/00D01F1/10D01F9/16
CPCD01F1/10D01F2/00D01F9/16
Inventor 靳宏张玉梅王华平李建武吴开建
Owner DONGHUA UNIV
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