Functionalizing zein through antisolvent precipitation from ethanol or aetic acid

Area of Science:

• Food Science
• Materials Science
• Biomaterials

Background:

• Zein protein networks in water are typically brittle with low yield strength.
• Improving zein network functionality is crucial for food applications.

Purpose of the Study:

• Investigate antisolvent precipitation as an alternative method for preparing zein networks.
• Analyze the rheological and structural properties of zein networks prepared via antisolvent precipitation.
• Determine the solvent-dependent modifications in zein network functionality.

Main Methods:

• Zein dissolution in ethanol or glacial acetic acid.
• Antisolvent precipitation by adding excess water.
• Rheological and structural property analysis of the resulting zein networks.

Main Results:

• Precipitation from ethanol yielded a porous, organized zein network with enhanced ductility.
• Precipitation from glacial acetic acid produced a plasticized, continuous zein network with slightly reduced brittleness.
• Zein network functionality was maintained for 24 hours.

Conclusions:

• Antisolvent precipitation offers a simple, inexpensive, and food-grade method to improve zein network functionality.
• This technique enhances zein networks for food structuring applications.
• Solvent choice significantly impacts the structural and rheological properties of the modified zein networks.