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Chapters
- 00:05Title
- 01:02Preparation of Biopolymer Stock Solutions
- 02:01Production of Hydrogels
- 03:00Solvent Exchange of Hydrogels under Ambient Conditions
- 04:03Production of Aerogels by Supercritical CO2 Drying
- 05:01Solvent Exchange of Hydrogels under Pressure
- 05:45Results: Amidated Pectin Hydrogel and Aerogel Characteristics
- 06:40Conclusion
A new way for the production of biopolymer-based aerogels by carbon dioxide (CO2) induced gelation is shown. The technique utilizes pressurized carbon dioxide (5 MPa) for the production of biopolymer hydrogels and supercritical CO2 (12 MPa) to convert gels into aerogels. The only solvents needed besides CO2 are water and ethanol.
