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Preparation method of carbon nanotube-reinforced polyvinyl alcohol composite fiber

A polyvinyl alcohol and carbon nanotube technology, which is applied in the field of reinforced fiber material preparation, can solve problems such as unsatisfactory carbon nanotube dispersibility, and achieve the effects of excellent medical value, large aspect ratio, and good dispersion effect.

Inactive Publication Date: 2013-07-24
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the Chinese invention patent "a carbon nanotube-reinforced polyvinyl alcohol composite material and its preparation method" (CN1900155), polyvinyl alcohol is used as a matrix and an aqueous solution is used as a dispersant to disperse cholate-modified carbon nanotubes in polyvinyl alcohol. Vinyl alcohol to improve the mechanical properties of polyvinyl alcohol composites, but the dispersion of carbon nanotubes is not ideal

Method used

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  • Preparation method of carbon nanotube-reinforced polyvinyl alcohol composite fiber
  • Preparation method of carbon nanotube-reinforced polyvinyl alcohol composite fiber
  • Preparation method of carbon nanotube-reinforced polyvinyl alcohol composite fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use dimethyl sulfoxide / water solution with a volume ratio of 3:1 as the solvent.

[0022] Add 44.5 mg of tea polyphenols to 10 ml of the above solvent, stir magnetically for 10 minutes, then add 14.8 mg of multi-walled carbon nanotubes, ultrasonicate for 30 minutes, and leave for one day to obtain a well-dispersed carbon nanotube / tea polyphenol solution.

[0023] Weigh 15.24g of polyvinyl alcohol into a dry two-necked flask, add 80ml of solvent, and add the above-mentioned well-dispersed carbon nanotube / tea polyphenol solution, and stir for 4 hours at 90°C without a magnetic field to obtain a solid content of 16wt % of polyvinyl alcohol / carbon nanotubes / tea polyphenol solution is the spinning solution, wherein the content of carbon nanotubes is 4×10 -3 g / mL.

[0024] Preparation of a carbon nanotube solution comparison example: 14.8 mg of multi-walled carbon nanotubes were added to 10 ml of solvent, ultrasonicated at a frequency of 45 kHz for 30 minutes, and a carbon n...

Embodiment 2

[0031] Weigh 15.24g of polyvinyl alcohol in a dry two-necked flask, add 80ml of solvent, and add the well-dispersed carbon nanotube / tea polyphenol solution prepared in Example 1, and stir for 4 hours at 90°C without a magnetic field to prepare Obtain a carbon nanotube and polyvinyl alcohol solution with a solid content of 14wt%, wherein the content of the carbon nanotube is at 2×10 -3 g / mL.

[0032] Add the well-dispersed polyvinyl alcohol / carbon nanotube / tea polyphenol solution into the spinning tube, control the temperature at 60°C, the temperature of the coagulation bath at -20°C, and the composition of the coagulation bath by volume, methanol: water is 5: 1. The distance between the spinneret hole and the coagulation bath is 0.6cm, and the winding speed is 40m / min to obtain carbon nanotube-reinforced polyvinyl alcohol primary fibers.

[0033] Put the solidified and washed fiber at room temperature for one day and then stretch it on a dry heat stretching machine. The f...

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Abstract

The invention discloses a preparation method of a carbon nanotube-reinforced polyvinyl alcohol composite fiber. The preparation method comprises the following steps of: dissolving a dispersant, namely tea polyphenols in a solvent with dimethyl sulfoxide and deionized water, and then adding multi-walled carbon nanotubes according to a certain proportion to perform ultrasonic dispersion treatment so as to obtain a multi-walled carbon nanotube / tea polyphenol system; adding the system into a polyvinyl alcohol solution with a certain concentration to obtain a spinning stock solution with good dispersion of the carbon nanotubes; and adopting a dry-wet spinning process to obtain the carbon nanotube-reinforced polyvinyl alcohol composite fiber. According to the preparation method disclosed by the invention, polyvinyl alcohol is taken as a substrate, no chemical treatment is performed on the carbon nanotubes, and the tea polyphenols are taken as an additive for dispersing the carbon nanotubes; and by using the method, the carbon nanotubes can be uniformly dispersed in the polyvinyl alcohol substrate, and the mechanical properties of the polyvinyl alcohol / carbon nanotube composite fiber are significantly improved. The preparation method provided by the invention has the advantages of simple process, environmental friendliness, low cost and high added value.

Description

technical field [0001] The invention relates to a method for preparing carbon nanotube-reinforced polyvinyl alcohol composite fibers, in particular to a method for preparing carbon nanotube-reinforced polyvinyl alcohol composite fibers by using a dry-wet spinning process, and belongs to the technical field of preparation of reinforced fiber materials. Background technique [0002] Polyvinyl alcohol (PVA) is a water-soluble polymer obtained by hydrolysis of polyvinyl acetate. It has good chemical stability and biocompatibility, is non-toxic, and has good spinnability. Carbon nanotubes have properties such as high strength and high modulus, high aspect ratio, and excellent electrical properties, and are currently widely used as reinforcing materials in the field of polymer materials. [0003] The focus of preparing polymer-based carbon nanotube composites with excellent performance is to disperse carbon nanotubes uniformly in the polymer matrix. Carbon nanotubes can be modifie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50D01F1/10
Inventor 戴礼兴陆玲玲侯文俊唐伯清
Owner SUZHOU UNIV
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