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Properties of zein films coated with drying oils.
J Agric Food Chem. 2005 May 04; 53(9):3444-8.JA

Abstract

Zein films prepared by resin were coated with either flax oil or tung oil and cured by UV- or gamma-radiation. Coated zein films were then evaluated for tensile and water barrier properties. Film microstructure was examined by transmitted light microscope. Tensile strength, elongation, and toughness of oil-coated samples increased substantially with respect to uncoated films. Flax oil coated samples showed an increase in elongation of 300%. It was suggested that oil coatings fill in pinholes and cracks existing in zein films, affecting their mechanical properties. Water vapor permeability also decreased statistically for coated film (except for tung oil coated-UV treated films), suggesting water vapor transfer was controlled by film hydrophobicity and microstructure. Moreover, the liquid water transmission rate of coated films was at least 10 times slower than for control films. Examination of film microstructure revealed that flax oil coatings had uniform coverage and smooth finish, which explained their high elongation, low water vapor permeability. Tung oil coatings cured under UV light showed patterns of intertwined dark and light regions, which may be caused by cross-linking and drying at different times. The oriented structures were found when tung oil coatings were cured by gamma-radiation.

Authors+Show Affiliations

Wang Q
Department of Food Science and Human Nutrition, University of Illinois, 382/D AESB, 1304 West Pennsylvania Avenue, Urbana, Illinois 61801, USA.
Padua GW
No affiliation info available

MeSH

Chemical PhenomenaChemistry, PhysicalFood PackagingLinseed OilPermeabilityPlant OilsTensile StrengthWaterZein

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15853385

Citation

Wang, Qin, and Graciela W. Padua. "Properties of Zein Films Coated With Drying Oils." Journal of Agricultural and Food Chemistry, vol. 53, no. 9, 2005, pp. 3444-8.
Wang Q, Padua GW. Properties of zein films coated with drying oils. J Agric Food Chem. 2005;53(9):3444-8.
Wang, Q., & Padua, G. W. (2005). Properties of zein films coated with drying oils. Journal of Agricultural and Food Chemistry, 53(9), 3444-8.
Wang Q, Padua GW. Properties of Zein Films Coated With Drying Oils. J Agric Food Chem. 2005 May 4;53(9):3444-8. PubMed PMID: 15853385.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Properties of zein films coated with drying oils. AU - Wang,Qin, AU - Padua,Graciela W, PY - 2005/4/28/pubmed PY - 2005/6/29/medline PY - 2005/4/28/entrez SP - 3444 EP - 8 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 53 IS - 9 N2 - Zein films prepared by resin were coated with either flax oil or tung oil and cured by UV- or gamma-radiation. Coated zein films were then evaluated for tensile and water barrier properties. Film microstructure was examined by transmitted light microscope. Tensile strength, elongation, and toughness of oil-coated samples increased substantially with respect to uncoated films. Flax oil coated samples showed an increase in elongation of 300%. It was suggested that oil coatings fill in pinholes and cracks existing in zein films, affecting their mechanical properties. Water vapor permeability also decreased statistically for coated film (except for tung oil coated-UV treated films), suggesting water vapor transfer was controlled by film hydrophobicity and microstructure. Moreover, the liquid water transmission rate of coated films was at least 10 times slower than for control films. Examination of film microstructure revealed that flax oil coatings had uniform coverage and smooth finish, which explained their high elongation, low water vapor permeability. Tung oil coatings cured under UV light showed patterns of intertwined dark and light regions, which may be caused by cross-linking and drying at different times. The oriented structures were found when tung oil coatings were cured by gamma-radiation. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/15853385/Properties_of_zein_films_coated_with_drying_oils_ DB - PRIME DP - Unbound Medicine ER -