Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of method for preparing modified graphene-chitosan composite film

A composite film and graphene technology, which is applied in the field of preparing modified graphene-chitosan composite films, can solve the problems that limit the research and application scope of graphene-chitosan composite materials, poor hydrophilicity and lipophilicity, and mutual Weak effect, etc., to achieve excellent biofunctionality and compatibility, facilitate processing and preparation, and enhance the effect of interfacial adhesion

Active Publication Date: 2018-03-27
芽米科技(广州)有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of graphene is in an inert state, the interaction with other media is weak, and there is a strong van der Waals force between graphene sheets, resulting in poor hydrophilicity and lipophilicity, which makes it in the shell The polysaccharide matrix has poor dispersion and is easy to agglomerate, so it cannot be well compounded with the polymer matrix, which greatly limits the further research and application range of graphene-chitosan composites

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method for preparing modified graphene-chitosan composite film
  • A kind of method for preparing modified graphene-chitosan composite film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] 1) Preparation of modified graphene: firstly disperse graphene oxide in deionized water, and ultrasonically shake and stir at room temperature for 0.1-12 hours to obtain a graphene oxide-water dispersion with a concentration of 0.01-2.0 mg / mL; then Add 7-amino-4-methylcoumarin to the graphene oxide-water dispersion, stir at 20-50°C for 0.1-12h; then add alkaline solution, stir for 0.1-12h, and adjust the pH to 9-10; then add a chemical reducing agent, react at 60-100°C for 12-96h to obtain a modified mixed solution; filter the modified mixed solution to obtain a solid substance, and then wash the said modified mixed solution with ethanol and deionized water in sequence Solid matter to neutral; placed in the atmosphere or in a vacuum environment, dried at 40-80°C to constant weight to obtain modified graphene.

[0030] The operation of this step is to prepare modified graphene by adding modifier and chemically reducing graphene oxide. In described graphene oxide, 7-amin...

Embodiment 1

[0040] Adopt the following method to prepare modified graphene-chitosan composite film:

[0041] 1) Preparation of modified graphene: disperse graphene oxide in deionized water first, and ultrasonically shake and stir at room temperature for 6 hours to obtain a graphene oxide-water dispersion with a concentration of 0.03 mg / mL.

[0042]Then add 7-amino-4-methylcoumarin to the graphene oxide-water dispersion, stir at 20°C for 1 h; then add an aqueous sodium hydroxide solution with a concentration of 0.5 mol / L, stir for 2 h, and Adjust the pH value to 9-10; then add the chemical reducing agent hydrazine hydrate, react at 80° C. for 32 hours to obtain the modified mixed solution.

[0043] Suction filter the modified mixed solution to obtain a solid substance, and then wash the solid substance with ethanol and deionized water to neutrality; place it in an atmospheric environment, and dry it to a constant weight at 50°C to obtain the modified graphene .

[0044] The mass ratio of...

Embodiment 2

[0049] Adopt the following method to prepare modified graphene-chitosan composite film:

[0050] 1) Preparation of modified graphene: first disperse graphene oxide in deionized water, and ultrasonically shake and stir at room temperature for 8 hours to obtain a graphene oxide-water dispersion with a concentration of 0.05 mg / mL;

[0051] Then add 7-amino-4-methylcoumarin to the graphene oxide-water dispersion, stir at 30°C for 2h; then add an aqueous sodium hydroxide solution with a concentration of 1.0mol / L, stir for 3h, and Adjust the pH value to 9-10; then add the chemical reducing agent vitamin C, and react at 90°C for 24 hours to obtain the modified mixed solution;

[0052] Suction filter the modified mixed solution to obtain a solid substance, and then wash the solid substance with ethanol and deionized water to neutrality; place it in a vacuum environment, and dry it to a constant weight at 55°C to obtain the modified graphene ;

[0053] The mass ratio of the graphene ...

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
Login to View More

PUM

PropertyMeasurementUnit
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a modified graphene-chitosan composite film. The modifier of the invention is 7-amino-4-methylcoumarin, and the invention is hydrazine hydrate, vitamin C or glucose, etc. Chemical reducing agent; first prepare modified graphene, then prepare the dispersion of modified graphene, then add the dispersion of modified graphene to chitosan acetic acid solution to obtain uniformly dispersed modified graphene-chitosan Sugar mixed solution; finally, the above mixed solution is poured into a container, and dried at 40-80 degrees Celsius to constant weight in the atmosphere or in a vacuum environment to obtain a modified graphene / chitosan composite film. Wherein, the mass fraction of modified graphene is 0.1%-15%. The invention has the advantages of simple preparation, mild reaction conditions, easy operation and control, and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material preparation, and in particular relates to a method for preparing a modified graphene-chitosan composite film. Background technique [0002] Chitosan, also known as polyglucosamine (1-4)-2-amino-B-D glucose, is a natural polymer obtained by de-N-acetylation of chitin, which has excellent biological functionality and Compatibility, microbial degradability and other excellent properties make chitosan and its composite materials widely used in the fields of biology, medicine, chemical industry and food. [0003] Graphene is a new type of two-dimensional nanocarbon material with excellent electrical, mechanical and thermal properties. Therefore, adding it to polymers as a nanofiller component can effectively improve the electrical, mechanical and thermal properties of polymers. thermal performance. Therefore, this method will become a research hotspot and focus in the field of poly...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/08C08K9/04C08K3/04C08J5/18
Inventor 黄杰李桥
Owner 芽米科技(广州)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com