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Anti-freeze and self-repairing conductive nano-composite hydrogel fiber and preparation method thereof

A composite hydrogel and conductive nanotechnology, which is applied in the manufacture of conductive/antistatic filaments, complete sets of equipment for the production of artificial threads, conjugated synthetic polymer artificial filaments, etc., can solve the problems of low mechanical properties, antifreeze and self- There are no problems with the repair performance, and the effect of good mechanical strength, self-healing ability, mechanical strength and electrical conductivity is improved

Active Publication Date: 2020-03-31
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a kind of antifreeze, self-repairing conductive nano-composite hydrogel fiber and its preparation method, which overcomes the low mechanical properties of the existing hydrogel conductive fiber, and almost no freeze-resistance and self-repairing performance. In the present invention, the method of synchronous polymerization-stretching of the gel pre-polymerization liquid before the polymerization reaction is completed is innovatively adopted, and the unreacted nascent hydrogel is placed in the aniline monomer bath. Synchronous extrusion-polymerization-stretching is carried out to continuously prepare a smart hydrogel fiber material with good electrical conductivity and mechanical strength. This hydrogel fiber material has both frost resistance and self-healing ability

Method used

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  • Anti-freeze and self-repairing conductive nano-composite hydrogel fiber and preparation method thereof
  • Anti-freeze and self-repairing conductive nano-composite hydrogel fiber and preparation method thereof
  • Anti-freeze and self-repairing conductive nano-composite hydrogel fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Weigh 8 mL of deionized water, 2 mL of glycerin, 0.75 g of Laponite, 0.03 g of potassium persulfate, and 0.3 g of multi-walled carbon nanotubes at room temperature and heat and stir for 5 h until they are uniformly dispersed to obtain a dispersion. Next, weigh 0.6g of OEGMA (Mw=500) and 0.8g of acrylamide (Mw=71) into the dispersion liquid and lower it to room temperature and stir for 2 hours to obtain a gel prepolymer liquid. Add 60 μL accelerator N,N,N,N-tetramethylethylenediamine to the gel prepolymerization solution, and quickly transfer the prepolymerization solution to a 2mm inner diameter, 80cm long polytetrafluoroethylene tube within 1min After 6 minutes, slowly extrude the nascent hydrogel in the tube through a 50mL needle tube, and at the same time immerse the nascent hydrogel in the aniline monomer while extruding. After immersion for 4 minutes, the nascent hydrogel The end clamps for coaxial drawing, the drawing line speed is 40m / min, and the drawing ratio i...

Embodiment 2

[0053] Weigh 6 mL of deionized water, 4 mL of glycerin, 0.3 g of cellulose nanofibers, 0.04 g of potassium persulfate, and 0.5 g of multi-walled carbon nanotubes at room temperature and heat and stir for 5 h until uniform dispersion is obtained to obtain a dispersion. Then weigh 0.5g of OEGMA (Mw=500) and 0.9g of hydroxyethyl methacrylate (Mw=130) into the dispersion liquid and lower it to room temperature and stir for 2 hours to obtain a gel prepolymer liquid. Add 40 μL accelerator N,N,N,N-tetramethylethylenediamine to the gel prepolymerization solution, and quickly transfer the prepolymerization solution to a 3mm inner diameter, 100cm long polytetrafluoroethylene tube within 1min After 8 minutes, slowly extrude the nascent hydrogel in the tube through a 50mL needle tube, and at the same time immerse the nascent hydrogel in the aniline monomer while extruding. After immersion for 3 minutes, the nascent hydrogel The end clamps for coaxial drawing, the drawing line speed is 60m...

Embodiment 3

[0055] Weigh 6mL of deionized water, 2ml of glycerin, 0.6g of silicon dioxide, 0.03g of ammonium persulfate, and 0.24g of graphene oxide at room temperature and heat and stir for 4 hours until uniformly dispersed to obtain a dispersion. Then weigh 0.4g of OEGMA (Mw=500) and 0.6g of N,N-dimethylacrylamide (Mw=99) monomers into the dispersion, lower the temperature to room temperature and stir for 2 hours to obtain a gel prepolymer. Add 20 μL accelerator N,N-dimethylaniline to the gel pre-polymerization solution, and quickly transfer the pre-polymerization solution to a 1 mm inner diameter and 100 cm long polytetrafluoroethylene tube within 1 min. After 12 min, pass Slowly extrude the nascent hydrogel in the tube with a 50mL needle, and immerse the nascent hydrogel in the aniline monomer while extruding. Drawing, the drawing line speed is 60m / min, the drawing ratio is 20 times, and after the drawing is finished, let it stand for 1 hour to finalize the shape, and the conductive n...

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Abstract

The invention relates to an anti-freeze and self-repairing conductive nano-composite hydrogel fiber and a preparation method thereof. The fiber is obtained by performing synchronous extrusion-polymerization-stretching on a primary hydrogel, which has not been completely reacted, in an aniline monomer bath through a synchronous polymerization-stretching method. The conductive nano-composite hydrogel fiber with anti-freeze and self-repairing performances prepared by the invention is extensive in application range, low in preparation cost, and convenient for industrial production, and an effective new thought is provided for the designing or preparation of other conductive fiber or fabric.

Description

technical field [0001] The invention belongs to the field of functional composite hydrogel fiber and its preparation, in particular to a frost-resistant, self-repairing conductive nano composite hydrogel fiber and its preparation method. Background technique [0002] Hydrogel is a kind of polymer soft-wet material with three-dimensional cross-linked network structure. It has the characteristics of high water content, high porosity, responsiveness to environmental stimuli, swelling without dissolution, etc., and is highly compatible with the structure and performance of human tissue. , has important research value and application prospects in the fields of biomedicine and bionic devices. [0003] Hydrogels usually have disadvantages such as low gel strength, poor toughness, and slow water absorption, which cannot meet the requirements of some applications. Therefore, the introduction of physical crosslinking agents is used to enhance the mechanical properties of hydrogels su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F8/10D01F1/09C08J3/09C08G73/02C08F220/56C08F220/20C08F220/54C08F220/28D01D13/00
CPCC08F220/20C08F220/54C08F220/56C08G73/0266C08J3/095C08J2333/14C08J2333/24C08J2333/26D01D13/00D01F1/09D01F8/10D01F8/16
Inventor 朱美芳陈涛危培玲陈国印侯恺
Owner DONGHUA UNIV
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