Ordered chitosan crosslinked membrane and its preparation method
A technology of chitosan cross-linking and sequenced chitosan, which is applied in the field of chemical engineering to achieve the effect of comprehensive functions, maintaining chemical structure, and simple preparation process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
example 1
[0025] Example 1: a. get 1g chitosan and be dissolved in the acetic acid solution of 1000ml 0.5% (V / V), make the chitosan acetic acid dilute solution of 0.1%, adjust the pH value of this solution to 3.5, add 5.30 * 10 -3 mol of glutaraldehyde solution, fully stirred and carried out cross-linking reaction at 25°C for 1h, 5h, 10h, 15h, 20h, 24h; Precipitated in the medium, after the precipitate was centrifuged and washed with distilled water, it was gradually dissolved with 12.5ml 5%, 10.0ml 10%, 10.0ml 15% (V / V) acetic acid solution to make 1.2% (w / w) ) chitosan microsphere solution; c. add 3.33 × 10 to 1000ml gained chitosan microsphere solution -4 mol of glutaraldehyde solution to obtain a chitosan film-forming solution; d. After the above-mentioned film-forming solution is centrifuged and degassed, it is injected into a PET plastic circular container, and dried in a thermostat at 37±1°C to form a film. Finally, soak the film with 2% (wt%) sodium hydroxide solution to neutra...
example 2
[0026]Example 2: Get 0.8g chitosan and be dissolved in 1 liter of 0.3% (V / V) hydrochloric acid solution, make the chitosan solution of 0.8g / L, add glutaraldehyde, make its concentration in the reaction solution 4×10 -3 mol / L, fully stirred and carried out cross-linking reaction at room temperature for 4 hours to obtain chitosan microspheres with uniform size, and separate the obtained chitosan microspheres. With gained chitosan microsphere again as solute, take 10% hydrochloric acid as solvent, be mixed with the chitosan microsphere solution that concentration is 25g / L, this solution of 1000ml is mixed with 1.8 * 10 -3 mol of glyoxal is then subjected to cross-linking reaction to obtain an ordered chitosan film-forming solution. After the above-mentioned film-forming solution is centrifugally degassed, it is poured into a PET plastic circular container and dried in a thermostat at 37±1°C film forming. Finally, the film is soaked with 2% (wt%) sodium hydroxide solution to neu...
example 3
[0027] Example 3: dissolve chitosan with 0.3% (V / V) nitric acid aqueous solution, make the chitosan solution that concentration is 0.2g / L, allow this solution of 1000ml and 8.6 * 10 -4 mol of sulfuric acid undergoes intramolecular cross-linking reaction to obtain chitosan microspheres with uniform size, then use the obtained chitosan microspheres as solute and 5% (V / V) nitric acid solution as solvent to prepare chitosan microspheres For a solution with a concentration of 12g / L, mix 1000ml of this solution with 1.34×10 -5 mol of sulfuric acid to carry out cross-linking reaction to obtain an ordered chitosan film-forming solution, which is formed into a film according to a conventional method.
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More