Physical aspects - Surface active material
8 important questions on Physical aspects - Surface active material
What are 6 surface active materials?
- Fatty acids
- Surfactants (esters)
- Globular proteins
- Flexible proteins
- Polymers (macromolecules)
- Polysaccharide gum arabic
How do fatty acids act as surface active materials?
How do surfactants (esters) acts as surface active materials?
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How do globular proteins act as surface active materials?
Large proteins are very surface active, smaller proteins (and peptides) are not surface active as their hydrophobic/hydrophilic sides are not distinctive and large enough.
How do flexible proteins act as surface active material?
How do polymers act as surface active materials?
How does the polysaccharide gum arabic act as surface active material?
What can the charge of surface active materials be and what does it result in?
- Neutral
- Anionic (negatively charged)
- Cationic (positively charged)
- Amphoteric (both positive and negative charges, e.g. Proteins)
Charge leads to electrostatic repulsion, it may prevent aggregation in emulsions.
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