Brown Algae for Materials - AlgeCenter Danmark · Martin Sterner, Ulrica Edlund Fiber- and Polymer...
11
FA 3 Biorefinery Martin Sterner , Ulrica Edlund Fiber- and Polymer Technology Brown Algae for Materials
Transcript of Brown Algae for Materials - AlgeCenter Danmark · Martin Sterner, Ulrica Edlund Fiber- and Polymer...
FA 3 Biorefinery
Martin Sterner, Ulrica Edlund
Fiber- and Polymer Technology
Brown Algae for Materials
Algal biomass
• Alginate
• Laminarin
• Mannitol
• Cellulose
• Protein
• More
Saccharinalatissima
Extraction for material purpose
• Mild extraction with chelation at lower pH
Harsh Mild
Chelation
• Coordinated ionic bonds
C
C
O
O
O-
O-
C
C
O
O
O
O
Ca2+
Ca
Chelation
Chelation in extraction
Chelation strength
Insoluble part
Chelation in extraction
Chelation strength
Insoluble part
Precipitatedalginate
Solubilization of protein
pH
Higher pH
Much higher pH
Protein
Extraction with Sodium Citrate
Solubilized
Insoluble88%
12%
Extraction with Sodium Citrate
Alginate
Laminarin
MannitolProtein
SaltsCellulose 5%Protein 4% Salts 3%
32%
12%
Chelation strength
18%
25%
10%3%
pH
Ion association constant for Ca2+ ion
Alginate
Salts
Ion association constant
Materials that can be made by alginate
• Gels for food and medical applications
• Entrapment material for cells and biocatalysts
• Impression material
• Paper sizing
• Edible coatings
• Ion absorbing materials
• Gelcasting of ceramics
