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Chitosan/carbon nanometer tube static spinning membrane preparation method

A carbon nanotube and electrospinning technology, which is applied in rayon manufacturing, textile and paper making, filament/thread forming, etc., can solve the problems of preparation and performance of electrospun fiber fabric materials without electrostatic shielding and antibacterial functions, and achieve Good electromagnetic shielding performance, good solubility and film-forming properties, and excellent antibacterial performance

Inactive Publication Date: 2006-02-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are no reports or patents related to the preparation and performance of carbon nanotube / chitosan electrospun fiber fabric materials with both electrostatic shielding and antibacterial functions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1) Acidification of CNTs: Add 6.0g of multi-walled CNTs to 200ml of HNO3 / H2SO4 (3:1) mixed acid to prepare a 0.03g / mL solution, heat it to boiling state and reflux for 70min, and filter it with a filter membrane 1. Wash with deionized water until weakly acidic, and dry in vacuum at 70°C for 48h.

[0014] 2) Chitosan solution preparation: Dissolve chitosan with a certain molecular weight of 100,000 in glacial acetic acid solution (mass concentration is 2%) at room temperature, prepare a solution that is 4% by volume and mass fraction, and stir magnetically for 2 hours , to obtain a transparent light yellow chitosan glacial acetic acid solution.

[0015] 3) electrostatic assembly of chitosan / carbon nanotubes: the carbon nanotubes obtained in step 1) are dissolved in deionized water, and ultrasonically dispersed to obtain a carbon nanotube solution with a concentration of 6.0 mg / mL; the carbon nanotube solution and step 2 ) The chitosan solution obtained was mixed accordi...

Embodiment 2

[0018] 1) Acidification of CNTs: Add 6.0g of multi-walled CNTs to 200ml of HNO3 / H2SO4 (3:1) mixed acid to prepare a 0.03g / mL solution, heat it to boiling state and reflux for 70min, and filter it with a filter membrane 1. Wash with deionized water until weakly acidic, and dry in vacuum at 70°C for 48h.

[0019] 2) Preparation of chitosan solution: Dissolve chitosan with a certain molecular weight of 200,000 in glacial acetic acid solution (mass concentration is 2%) at room temperature, prepare a solution that is 5% by volume and mass fraction, and stir magnetically for 2 hours , to obtain a transparent light yellow chitosan glacial acetic acid solution.

[0020] 3) electrostatic assembly of chitosan / carbon nanotubes: the carbon nanotubes obtained in step 1) are dissolved in deionized water, and ultrasonically dispersed to obtain a carbon nanotube solution with a concentration of 6.0 mg / mL; the carbon nanotube solution and step 2 ) The chitosan solution obtained was mixed acco...

Embodiment 3

[0023] 1) Acidification of CNTs: Add 6.0g of multi-walled CNTs to 200ml of HNO3 / H2SO4 (3:1) mixed acid to prepare a 0.03g / mL solution, heat it to boiling state and reflux for 70min, and filter it with a filter membrane 1. Wash with deionized water until weakly acidic, and dry in vacuum at 70°C for 48h.

[0024] 2) Chitosan solution preparation: Dissolve chitosan with a certain molecular weight of 200,000 in glacial acetic acid solution (mass concentration is 2%) at room temperature, prepare a solution that is 6% by volume and mass fraction, and stir magnetically for 2 hours , to obtain a transparent light yellow chitosan glacial acetic acid solution.

[0025] 3) chitosan / carbon nanotube electrostatic assembly: the carbon nanotube obtained in step 1) is dissolved in deionized water, and ultrasonically dispersed to obtain a carbon nanotube solution with a concentration of 8.0 mg / mL; the carbon nanotube solution is mixed with step 2 ) The chitosan solution obtained was mixed acc...

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Abstract

The present invention is the preparation process of electrostatic spun chitosan / carbon nanotube film, and belongs to the field of antibiotic and antistatic material preparing technology. The preparation process includes the following steps: dissolving carbon nanotube in acid mixture to compound solution, heating the solution to boil, filtering, washing to weak acid and vacuum drying; dissolving chitosan inside glacial acetic acid solution to obtain yellowish glacial acetic acid solution of chitosan; mixing the carbon nanotube solution and the chitosan solution to obtain molecule level composite solution; mixing the molecule level composite solution with glacial acetic acid solution of PVA; and spinning. The preparation process is simple, and the obtained electrostatic spun chitosan / carbon nanotube material has high solubility, good filming performance, high conductivity, excellent antibiotic performance and excellent electromagnetic shielding performance.

Description

technical field [0001] The invention relates to a preparation method of chitosan / carbon nanotubes (CNTs, containing multi-wall (n=2-20 layers) and single-wall CNTs) through electrostatic adsorption and then spinning to form a film, which belongs to antibacterial and antistatic materials Preparation technology. Background technique [0002] Chitosan is a deacetylated derivative of natural biopolysaccharide chitin, which has free amino groups and has very active physical and chemical properties. Because chitosan has no toxic side effects, good biocompatibility, and controllable biodegradation Antigenicity, non-antigenicity and other characteristics, and because of the active nature of the amino group, many groups and chemical substances can be used to modify or connect some cytokines and hormones that promote cell growth, so chitosan and chitosan membranes are widely used in biomedicine. , tissue engineering, drug release, cell and enzyme immobilization and many other aspects...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/00D01F1/02D01D5/00
Inventor 封伟袁晓燕冯奕钰段斌
Owner TIANJIN UNIV
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