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Linear shear rheology of aging β-casein films adsorbing at the air/water interface.

Authors
  • Martínez-Pedrero, F1
  • Tajuelo, J2
  • Sánchez-Puga, P2
  • Chulia-Jordan, R3
  • Ortega, F3
  • Rubio, M A2
  • Rubio, R G3
  • 1 Departamento de Física-Química I, Universidad Complutense de Madrid, Avda. Complutense s/n, Madrid 28040, Spain. Electronic address: [email protected] , (Spain)
  • 2 Departamento de Física Fundamental, Universidad Nacional de Educación a Distancia, UNED, 28040 Madrid, Spain. , (Spain)
  • 3 Departamento de Física-Química I, Universidad Complutense de Madrid, Avda. Complutense s/n, Madrid 28040, Spain. , (Spain)
Type
Published Article
Journal
Journal of Colloid and Interface Science
Publisher
Elsevier
Publication Date
Feb 01, 2018
Volume
511
Pages
12–20
Identifiers
DOI: 10.1016/j.jcis.2017.09.092
PMID: 28963984
Source
Medline
Keywords
License
Unknown

Abstract

In this work, the viscoelasticity of fragile β-casein films has been followed using different macro- and microrheological techniques. The modulus of the complex surface viscosity |η∗| varies with time, allowing for the monitoring of the protein adsorption and annealing. β-casein adsorption creates a soft glassy gel at the interface that experiences an aging process. Macrorheological experiments with multiple probe sizes in addition to microrheological experiments demonstrated the consistency of the surface rheological properties over a broad range of viscosities. Surface pressure measurements were performed to complement the characterization of the processes.

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