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Updated: Feb 9, 2026

Preparation of Biopolymer Aerogels Using Green Solvents
Published on: July 4, 2016
Thermal conductivity/structure correlations in thermal super-insulating pectin aerogels
Sophie Groult1, Tatiana Budtova1
1MINES ParisTech, PSL Research University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France.
Researchers developed pectin aerogels with ultra-low thermal conductivity. Optimizing density and pore size is key to achieving super-insulating bio-aerogels for advanced thermal management applications.
Area of Science:
- Materials Science
- Nanotechnology
- Biomaterials
Background:
- Aerogels offer excellent thermal insulation properties.
- Developing bio-based aerogels with tunable properties is crucial for sustainable materials.
- Understanding structure-property relationships in aerogels is key to optimizing performance.
Purpose of the Study:
- To synthesize pectin aerogels with tunable morphology and properties.
- To correlate thermal conductivity with aerogel structure.
- To achieve ultra-low thermal conductivity in bio-aerogels.
Main Methods:
- Pectin aerogels synthesized via dissolution-solvent exchange-drying with supercritical CO2.
- Varied polymer concentration, solution pH, and bivalent ions to control gelation.
- Analyzed aerogel morphology, density, and thermal conductivity.
Main Results:
- Achieved a U-shaped curve of thermal conductivity versus aerogel density for bio-aerogels.
- Lowest conductivity of 0.015 W/m·K obtained from non-gelled pectin solutions.
- Calcium-induced gels yielded low density but reduced insulation due to macropores.
Conclusions:
- Optimizing density and pore size is essential for minimizing thermal conductivity in pectin aerogels.
- Non-gelled pectin solutions provide a pathway to highly insulating bio-aerogels.
- Pectin aerogels show potential as sustainable super-insulating materials.
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