Surface tension and stability of foams based of keratin hydrolyzate

  • Zhanar Ospanova al-Farabi Kazakh National University http://orcid.org/0000-0003-3920-8100
  • Kuanyshbek Musabekov al-Farabi Kazakh National University
  • Saule Aidarova K.I. Satpaev Kazakh National Technical University, Almaty
DOI: https://doi.org/10.15328/cb579
Keywords: surface tension, keratin, wool, hydrolysis, foam, foaming agent, stability

Abstract

The protein obtained in the alkali hydrolysis consist of amino acid residues that are natural macromolecular surfactants and they can may be used as effective foam stabilizers. The features of dynamic surface tension and stability of foams on based of aqueous solutions of keratin hydrolyzate in a concentration range of 1-10% were studied. The relaxation time – of the adsorption layers of keratin hydrolyzate is equaled to 10-12 min. The parameters of adsorption at the liquid – gas interface were defined. The maximum surface activity, foaming and foam stability corresponds to a neutral pH close to isoelectric state of the protein. Increase the foam stability at pH ~ 7 proceeds due to the conformational changes of macro-molecules of the protein at the interface liquid – gas, forming particles of colloidal size, clogging channels Plateau-Gibbs and preventing expiration of the liquid film between.

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Published
2015-03-31
How to Cite
Ospanova, Z., Musabekov, K., & Aidarova, S. (2015). Surface tension and stability of foams based of keratin hydrolyzate. Chemical Bulletin of Kazakh National University, 77(1), 88-93. https://doi.org/https://doi.org/10.15328/cb579
Issue
Vol 77 No 1 (2015): Chemical Bulletin of Kazakh National University
Section
Colloid and Nano Chemistry
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