Stabilizing and destabilizing protein surfactant-based foams in the presence of a chemical surfactant: Effect of adsorption kinetics

Li, Huazhen, Le Brun, Anton P., Agyei, Dominic, Shen, Wei, Middelberg, Anton P. J. and He, Lizhong (2016) Stabilizing and destabilizing protein surfactant-based foams in the presence of a chemical surfactant: Effect of adsorption kinetics. Journal of Colloid and Interface Science, 462 56-63. doi:10.1016/j.jcis.2015.08.068


Author Li, Huazhen
Le Brun, Anton P.
Agyei, Dominic
Shen, Wei
Middelberg, Anton P. J.
He, Lizhong
Title Stabilizing and destabilizing protein surfactant-based foams in the presence of a chemical surfactant: Effect of adsorption kinetics
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 0021-9797
1095-7103
Publication date 2016-01-15
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.jcis.2015.08.068
Open Access Status Not Open Access
Volume 462
Start page 56
End page 63
Total pages 8
Place of publication Maryland Heights, MO United States
Publisher Academic Press Inc.
Collection year 2017
Language eng
Formatted abstract
Stimuli-responsive protein surfactants promise alternative foaming materials that can be made from renewable sources. However, the cost of protein surfactants is still higher than their chemical counterparts. In order to reduce the required amount of protein surfactant for foaming, we investigated the foaming and adsorption properties of the protein surfactant, DAMP4, with addition of low concentrations of the chemical surfactant sodium dodecylsulfate (SDS). The results show that the small addition of SDS can enhance foaming functions of DAMP4 at a lowered protein concentration. Dynamic surface tension measurements suggest that there is a synergy between DAMP4 and SDS which enhances adsorption kinetics of DAMP4 at the initial stage of adsorption (first 60 s), which in turn stabilizes protein foams. Further interfacial properties were revealed by X-ray reflectometry measurements, showing that there is a re-arrangement of adsorbed protein–surfactant layer over a long period of 1 h. Importantly, the foaming switchability of DAMP4 by metal ions is not affected by the presence of SDS, and foams can be switched off by the addition of zinc ions at permissive pH. This work provides fundamental knowledge to guide formulation using a mixture of protein and chemical surfactants towards a high performance of foaming at a low cost.
Keyword Adsorption kinetics
Dynamic surface tension
Foaming
Protein DAMP4
X ray reflectometry
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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