Solute-polymer-water interactions and their manifestations

Area of Science:

• Food Science
• Physical Chemistry
• Polymer Science

Background:

• Solute-polymer-water interactions are crucial in food systems.
• Water sorption behavior influences food properties and stability.
• Understanding these interactions aids in predicting food processing outcomes.

Purpose of the Study:

• To review recent work on solute-polymer-water interactions in model food systems.
• To discuss water sorption behavior in different solute-polymer combinations.
• To explore the impact of these interactions on various food phenomena.

Main Methods:

• Review of existing literature on solute-polymer-water interactions.
• Analysis of water sorption behavior in model food systems.
• Comparison of experimental data with mass balance calculations.

Main Results:

• Salt-protein, sucrose-starch, and salt-starch systems sorbed less water than predicted.
• Sucrose-protein systems sorbed more water than predicted due to increased protein hydration.
• Competition for water and the 'state' of water are key factors in these interactions.

Conclusions:

• Solute-polymer interactions significantly influence water sorption in food systems.
• These interactions affect critical food phenomena like microbial growth and chemical reactions.
• The order of mixing can also complicate these complex interactions.