Effect of Drying Processes on the Functional Properties of Collagen Peptides Produced from Chicken Skin

Abstract

Collagen peptide powders were produced by drying the peptides solution. The molecular weight distribution and amino acid composition of the peptides were determined and the effects of freeze-drying, spray-drying, and hot-air-drying methods on the functional properties were investigated. The collagen peptides had a molecular weight distribution of 180–5000 Da and high content of glycine, arginine, proline, and hydroxyproline but low content of cysteine and methionine. Freeze drying is found to be the best method to have superior functional properties. Spray drying can still be preferred if lower cost and higher production throughput are required.

Keywords:

• Collagen peptides
• Drying methods
• Enzymatic hydrolysis
• Functional properties

ACKNOWLEDGMENT

The authors acknowledge the financial support of the Research and Development Program (863-HI-TECH) of China to carry out this project (Contracts No. 2011AA100802).

Notes

Different lower case letters indicate significant difference within a column (p<0.05).