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Related Experiment Videos

Development of a continuous process to make casein films.

Michael Kozempel1, Peggy M Tomasula

  • 1Dairy Processing and Products Research Unit, Eastern Regional Research Service, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA. mkozempel@arserrc.gov

Journal of Agricultural and Food Chemistry
|March 5, 2004
PubMed
Summary

A new semicontinuous pilot plant process efficiently produces edible films from calcium caseinate and glycerol. This method yields films with tunable properties, similar to batch processes, and shows potential for other proteins.

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Area of Science:

  • Food Science
  • Materials Science
  • Chemical Engineering

Background:

  • Edible films offer sustainable packaging solutions.
  • Calcium caseinate is a promising biopolymer for film production.
  • Developing continuous processes is key for industrial scalability.

Purpose of the Study:

  • To develop and evaluate a semicontinuous pilot plant process for producing calcium caseinate-based edible films.
  • To characterize the mechanical properties of the produced films.
  • To assess the adaptability of the process for other proteins.

Main Methods:

  • A semicontinuous pilot plant setup was utilized.
  • Calcium caseinate and glycerol solutions were spread onto polyethylene or Mylar belts using a Meier rod.

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  • Film properties were analyzed, including tensile strength and elongation.
  • Glycerol concentration was adjusted to tune film characteristics.

    • Main Results:

    • The process successfully formed films from calcium caseinate plasticized with glycerol.
    • Films produced on a polyethylene belt exhibited a tensile strength of 5 MPa and 30% elongation at a thickness of 0.14 mm.
    • Adjusting glycerol concentration allowed for property modifications, matching previous batch process results.

    Conclusions:

    • The developed semicontinuous process is effective for producing calcium caseinate-based edible films.
    • The process offers control over film properties through glycerol concentration adjustment.
    • This methodology is anticipated to be applicable to other protein-based film production.