These are flashcards an notes made by students on topics like 'biopolymer', 'crosslink' and 'interfacial', originating from:

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- Wageningen University
ISBN-13 9990002019708
665 Flashcards & Notes
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Study Cards on biopolymer, crosslink, interfacial

Rate the types of water from close to the biopolymer to far from the biopolymer
  • Loosely bound water
  • Interfacial water --> monolayer + multilayers
  • Constitutional water/structural water
  • Bulk water
Close to biopolymer
  • Constitutional water/structural water
  • Interfacial water --> monolayer + multilayers
  • Loosely bound water
  • Bulk water

Far from biopolymer
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What is the value of χ when the biopolymer has a high affinity for moisture and what value if it does not really like water?
High affinity --> χ is negative
Does not like water --> χ is positive
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What does the Flory-Rhener theory consist of?
The total water activity (aw) of a biopolymer gel originates from:
  • the interaction between the biopolymer and the water (first part of the equation)
  • the elastic contribution (second part of the equation)
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What is the cause of swelling of a gel at different water activities?
  • Low aw --> interaction between biopolymer and solvent (water)
  • High aw --> crosslink density
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By which 2 parameters it he swelling capacity influenced?
X1 (hydrophilicity) and/or Mc (molecular weight between the crosslinks)
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How are Mc (molecular weight between the crosslinks) and crosslink density related?
It the inverse. So a higher crosslink density, gives a lower molecular weight between the crosslinks.
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