Preparation method and application of gelatin-chitosan composite membrane
A technology of chitosan and composite film, which is applied in the direction of flexible coverings, packaging, wrapping paper, etc., can solve the problems of chitosan easy to form agglomerates, low production efficiency, and long time, and achieve antibacterial and fresh-keeping effects and improve efficiency , the effect of significant effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0023] Example 1
[0024] A preparation method of gelatin-chitosan composite film, the steps are as follows:
[0025] (1) At room temperature, add 2.0 g of chitosan to a three-necked flask, add 98 mL of deionized water and stir for 3 minutes to disperse the chitosan uniformly, add 2 mL of phosphoric acid solution dropwise while stirring, adjust the pH to 3.5, and continue to stir fully , Get 2% (w / v) chitosan solution;
[0026] (2) Mix 10 mL of 20% (w / v) gelatin solution with the chitosan solution prepared in step (1), the mass ratio of gelatin to chitosan is 1:1, and stir at 40°C Mix uniformly to obtain a gelatin / chitosan mixed solution, add 0.4g PEG 200 to the gelatin / chitosan mixed solution, stir at 40°C to make the mixture uniform, and then neutralize it with a NaOH solution with a concentration of 1mol / L pH is 6;
[0027] (3) Add 0.004g of transglutaminase (TGase) to the reaction product of step (2), continue to stir at 40°C for 45 minutes, heat up to boiling to inactivate the ...
Example Embodiment
[0028] Example 2
[0029] A preparation method of gelatin-chitosan composite film, the steps are as follows:
[0030] (1) At room temperature, add 4g of chitosan into a three-necked flask, add 99mL of deionized water and stir for 5min to disperse the chitosan uniformly, add 1mL of formic acid solution dropwise while stirring, adjust the pH to 6, and continue to stir fully. Get a chitosan solution with a concentration of 4% (w / v);
[0031] (2) Mix 80 mL of gelatin solution with a concentration of 5% (w / v) with the chitosan solution prepared in step (1). The mass ratio of gelatin to chitosan is 1:1. Stir at 60°C. Mix evenly to obtain a gelatin / chitosan mixed solution. Add 2.4g PEG 200 to the gelatin / chitosan mixed solution and stir at 60℃ to make the mixture uniform. At this time, the pH is above 6 and close to 6.5, and no further adjustment is required. pH;
[0032] (3) Add 0.04g of transglutaminase (TGase) to the reaction product of step (2), continue to stir at 60°C for 35 minutes,...
Example Embodiment
[0033] Example 3
[0034] A preparation method of gelatin-chitosan composite film, the steps are as follows:
[0035] (1) At room temperature, add 3.5g of chitosan to a three-necked flask, add 98mL of deionized water and stir for 4min to disperse the chitosan uniformly, add 2mL of nitric acid solution dropwise while stirring, adjust the pH to 4, and continue to stir fully , Obtain a chitosan solution with a concentration of 3.5% (w / v);
[0036] (2) Mix 50 mL of gelatin solution with a concentration of 7% (w / v) with the chitosan solution prepared in step (1). The mass ratio of gelatin to chitosan is 1:1. Stir at 50°C Mix uniformly to obtain a gelatin / chitosan mixed solution, add 1.75g PEG 200 to the gelatin / chitosan mixed solution, stir at 50°C to make the mixture uniform, and then neutralize it with 0.5 mol / L NaOH solution To pH 6;
[0037] (3) Add 0.07g of transglutaminase (TGase) to the reaction product of step (2), continue to stir at 50°C for 40 minutes, heat up to boiling to ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap