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Reducing the brittleness of zein films through chemical modification.
J Agric Food Chem. 2011 Jan 12; 59(1):56-61.JA

Abstract

Zein protein is a major coproduct of biofuel from corn. To reduce the brittleness of zein films, a new type of zein-based biomaterial, was synthesized by chemical modification of zein with lauryl chloride through an acylation reaction. The final products were confirmed by (1)H NMR, FT-IR analysis, and SDS-PAGE. Thermal analysis detected no microphase separation in the synthesized polymer matrix. As the content of lauryl moiety increased, the glass transition temperatures of modified zein decreased by as large as 25.8 °C due to the plasticization effect of the lauryl moiety. In addition, mechanical and surface properties of cast films from acylated zein were also investigated. The elongation at break of modified zein sheet was increased by about 7-fold at the high modification level with some loss of mechanical strength. The surfaces of modified zein films were as uniform as unmodified zein film but more hydrophobic, further suggesting that no microphase separation happened during the film formation process. This work indicated the potential of these new biomaterials in the development of biodegradable food packaging materials and delivery systems.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Shi K
Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901, USA.
Huang Y
No affiliation info available
Yu H
No affiliation info available
Lee TC
No affiliation info available
Huang Q
No affiliation info available

MeSH

Compressive StrengthFood PackagingHydrophobic and Hydrophilic InteractionsMechanicsSurface PropertiesZein

Pub Type(s)

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

Language

eng

PubMed ID

21126002

Citation

Shi, Ke, et al. "Reducing the Brittleness of Zein Films Through Chemical Modification." Journal of Agricultural and Food Chemistry, vol. 59, no. 1, 2011, pp. 56-61.
Shi K, Huang Y, Yu H, et al. Reducing the brittleness of zein films through chemical modification. J Agric Food Chem. 2011;59(1):56-61.
Shi, K., Huang, Y., Yu, H., Lee, T. C., & Huang, Q. (2011). Reducing the brittleness of zein films through chemical modification. Journal of Agricultural and Food Chemistry, 59(1), 56-61. https://doi.org/10.1021/jf103164r
Shi K, et al. Reducing the Brittleness of Zein Films Through Chemical Modification. J Agric Food Chem. 2011 Jan 12;59(1):56-61. PubMed PMID: 21126002.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Reducing the brittleness of zein films through chemical modification. AU - Shi,Ke, AU - Huang,Yuping, AU - Yu,Hailong, AU - Lee,Tung-Ching, AU - Huang,Qingrong, Y1 - 2010/12/02/ PY - 2010/12/4/entrez PY - 2010/12/4/pubmed PY - 2011/4/19/medline SP - 56 EP - 61 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 59 IS - 1 N2 - Zein protein is a major coproduct of biofuel from corn. To reduce the brittleness of zein films, a new type of zein-based biomaterial, was synthesized by chemical modification of zein with lauryl chloride through an acylation reaction. The final products were confirmed by (1)H NMR, FT-IR analysis, and SDS-PAGE. Thermal analysis detected no microphase separation in the synthesized polymer matrix. As the content of lauryl moiety increased, the glass transition temperatures of modified zein decreased by as large as 25.8 °C due to the plasticization effect of the lauryl moiety. In addition, mechanical and surface properties of cast films from acylated zein were also investigated. The elongation at break of modified zein sheet was increased by about 7-fold at the high modification level with some loss of mechanical strength. The surfaces of modified zein films were as uniform as unmodified zein film but more hydrophobic, further suggesting that no microphase separation happened during the film formation process. This work indicated the potential of these new biomaterials in the development of biodegradable food packaging materials and delivery systems. SN - 1520-5118 UR - https://www.unboundmedicine.com/medline/citation/21126002/Reducing_the_brittleness_of_zein_films_through_chemical_modification_ L2 - https://doi.org/10.1021/jf103164r DB - PRIME DP - Unbound Medicine ER -