Food Biophysics

, Volume 6, Issue 4, pp 474–480 | Cite as

Mechanical and Barrier Properties of Films from Millet Protein Pennisetin

  • Thomas Gillgren
  • Marie-Victoire Faye
  • Mats Stading


Plastics are one of the most commonly used materials today in an immense range of applications. Since plastics originate from petroleum, which is not a renewable resource, we need to find alternatives to achieve environmentally sustainable goals. One of our most abundant renewable resources is cereals; wheat gluten is recognized as a replacement for synthetic plastics. Another cereal protein is pennisetin from pearl millet, which can grow in more arid areas and is therefore an important crop in times of climate change. In contrast to gluten, the material properties of pennisetin have as yet been relatively unexplored. This work evaluated the mechanical and barrier properties of pennisetin films, including three different plasticizers (glycerol only, glycerol/citric acid mixture, and glycerol/lactic acid/polyethylene glycol mixture). The films were cast from ethanol solutions. It was found that all of the three plasticizers resulted in approximately equal thermomechanical properties in the pennisetin films. However, the glycerol/citric acid mixture seemed to give more beneficial tensile and barrier properties. The advantage of this plasticizer mixture was believed to be due to the altered microstructure of the films. The material properties of pennisetin were found to be fully comparable to those of other cereal protein materials.


Biopolymer Protein Pennisetin Plasticizer Material properties 



The Swedish Agency for Innovation System (VINNOVA) is gratefully acknowledged for financial support to the project Renewable Functional Barriers.


  1. 1.
    Plastics Europe (2010). Available at: Accessed 16 Aug 2010
  2. 2.
    FAOSTAT (2010). Available at: Accessed 23 Sept 2010
  3. 3.
    J. Core, Agric. Res. 50, 20–21 (2002)Google Scholar
  4. 4.
    T. Gillgren, M. Stading, Food Biophys. 3, 287 (2008)CrossRefGoogle Scholar
  5. 5.
    M.N. Emmambux, M. Stading, J.R.N. Taylor, J. Cereal Sci. 40, 127 (2004)CrossRefGoogle Scholar
  6. 6.
    A. Jerez, P. Partal, I. Martinez et al., Biochem. Eng. J. 26, 131 (2005)CrossRefGoogle Scholar
  7. 7.
    J.P. Lens, W.M. Stevels, C.H.J.T. Dietz et al., Ind. Crop Prod. 17, 119 (2003)CrossRefGoogle Scholar
  8. 8.
    FAO (2010). Available at: Accessed 16 Aug 2010
  9. 9.
    P.S. Belton, J.R.N. Taylor, Trends Food Sci. Technol. 15, 94 (2004)CrossRefGoogle Scholar
  10. 10.
    J.M. Aguilera, D.W. Stanley, in Microstructural Principles of Food Processing and Engineering (Springer, New York, 1999)Google Scholar
  11. 11.
    P.R. Shewry, A.S. Tatham, in Seed Proteins, ed. by P.R. Shewry, R. Casey (Kluwer, Dordrecht, 1999), p. 11Google Scholar
  12. 12.
    J.R.N. Taylor, T.J. Schober, S.R. Bean, J. Cereal Sci. 44, 252 (2006)CrossRefGoogle Scholar
  13. 13.
    T.H. McHugh, R. Avena-Bustillos, J.M. Krochta, J. Food Sci. 58, 899 (1993)CrossRefGoogle Scholar
  14. 14.
    T. Gillgren, S.A. Barker, P.S. Belton et al., Biomacromolecules 10, 1135 (2009)CrossRefGoogle Scholar
  15. 15.
    P.R. Shewry, in Pseudocereals and Less Common Cereals. Grain Properties and Utilization Potential, ed. by P.S. Belton, J.R.N. Taylor (Springer, Berlin, 2002), p. 1Google Scholar
  16. 16.
    L. Slade, H. Levine, J.W. Finley, in Protein quality and the effects of processing (Marcel Dekker, New York, 1989), p. 9Google Scholar
  17. 17.
    J.K. Sears, J.R. Darby, in The Technology of Plasticizers (Wiley, New York, 1982), p. 35Google Scholar
  18. 18.
    C.E. Rogers, in Polymer Permeability, ed. by J. Comyn (Elsevier, London, 1985), p. 11CrossRefGoogle Scholar
  19. 19.
    J.A. Torres, in Protein functionallity in food system (Marcel Dekker, New York, 1994), p. 467Google Scholar
  20. 20.
    B. Ghanbarzadeh, M. Musavi, A.R. Oromiehie et al., LWT - Food Science and Technology 40, 1191 (2007)CrossRefGoogle Scholar
  21. 21.
    B.E. Ralston, N. Wochner, T.A. Osswald, in Global Plastics Environmental Conference (GPEC, Atlanta, 2006)Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Thomas Gillgren
    • 1
  • Marie-Victoire Faye
    • 1
  • Mats Stading
    • 1
    • 2
  1. 1.SIK-The Swedish Institute for Food and BiotechnologyGothenburgSweden
  2. 2.Department of Materials and Manufacturing TechnologyChalmers University of TechnologyGothenburgSweden

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