Polysaccharides - Cellulose and starch modification
7 important questions on Polysaccharides - Cellulose and starch modification
Which polysaccharide(s) are present in the crystalline regions of starch?
What are the benefits of polysaccharide modification?
- Insoluble cellulose needs functionalisation
- Native starches show defects in functionality, for example when thawing lots of syneresis
- Modifications to change one or ore of the following properties
- Pasting temperature
- Gelatinisation
- Retrogradation tendencies
- Hydrophilic character
How are derivates of starches and celluloses made?
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What are the multiple levels of complexity when making starch derivates?
- Small vs. Large granules
- Crystalline vs. Amorphous (easier)
- Amylose (easier) vs. Amylopectin
- Amylopectin backbone vs. Side chains
Mention 3 types of cellulose modifications
- Carboxymethyl cellulose (CMC)
- Hydroxypropylcellulose (HPC)
- Methylcellulose (MC)
What is an unique property of methylcellulose?
Why are starch and cellulose the most commonly used polymers to be modified?
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