Formation and functionality of self-assembled whey protein microgels.

Area of Science:

• Food Science
• Materials Science
• Biochemistry

Background:

• Whey proteins are globular proteins commonly found in dairy products.
• Protein self-assembly is influenced by factors like temperature, pH, and ionic strength.
• Understanding protein aggregation is crucial for food processing and product development.

Purpose of the Study:

• To review the formation of whey protein microgels.
• To explore the conditions necessary for stable microgel formation.
• To discuss the applications of whey protein microgels in food systems.

Main Methods:

• Heating whey protein solutions at controlled conditions.
• Characterizing particle size and structure using techniques like dynamic light scattering and microscopy.
• Evaluating the stability of protein suspensions.

Main Results:

• Whey proteins form spherical microgels (100nm-1μm) when heated below a critical net charge density.
• Stable microgel suspensions are achieved within a narrow range of protein charge density.
• Microgels can be used to stabilize emulsions and foams, form core-shell particles, create gels, and modify polysaccharide textures.

Conclusions:

• Whey protein microgels are versatile structures formed under specific thermal and charge conditions.
• These microgels offer significant potential for applications in food stabilization and texture modification.
• Further research into controlling microgel properties can unlock novel food ingredient functionalities.