Peptide and Protein Emulsifiers

Mohamed A. N. Soliman, Abdulwahhab Khedr, Mohamed A. Elsawy

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

There has recently been a growing attention towards peptide and protein molecules as potential bioemulsifiers for the stabilization of foams and emulsions, thanks to their innate tendency towards interfacial adsorption. Additionally, peptides and proteins are biodegradable and biocompatible, making them less toxic if compared to traditional emulsifiers. This chapter provides a comprehensive overview of the different classes of peptide, protein and mixed protein–polysaccharide emulsifiers and discusses the emulsification mechanisms of these systems. In essence, peptide-mediated emulsification can occur either via traditional surfactant-like mechanism, where amphiphilic molecular peptide chains adsorb at the biphasic interface forming ‘spherical micelles’, or through peptide self-assembly into higher secondary structure (α-helices or β-sheets) with the formation of amphiphilic nanofibrous structures adsorbing at the interface. Moreover, peptides can self-assemble in the continuous aqueous phase forming nanofibrous network of viscous hydrogels that enhance system stability. On the other hand, emulsion stabilization by proteins is mainly achieved through either electrostatic repulsion or steric stabilization. The various characterization techniques for emulsification and interfacial stabilization will be visited throughout this chapter, focusing on structural, mesoscopic and macroscopic characterization of these systems.
Original languageEnglish
Title of host publicationPeptide Bionanomaterials
Subtitle of host publicationFrom Design to Application
EditorsMohamed A. Elsawy
Place of PublicationCham
PublisherSpringer Cham
Chapter13
Pages431-474
Number of pages44
ISBN (Electronic)9783031293603
ISBN (Print)9783031293597
DOIs
Publication statusPublished - 30 Aug 2023

Keywords

  • emulsion
  • emulgel
  • emulsifier
  • self-assembled peptide
  • protein
  • interfacial self-assembly

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