Tags

Type your tag names separated by a space and hit enter

Wettability, surface microstructure and mechanical properties of films based on phosphorus oxychloride-treated zein.
J Sci Food Agric. 2011 May; 91(7):1222-9.JS

Abstract

BACKGROUND

Zein, the predominant protein in corn, has been extensively studied as an alternative packaging material in edible and biodegradable films. However, films made from 100% zein are brittle under normal conditions. The aim of this investigation was to improve the film-forming properties of zein by chemical phosphorylation. The surface hydrophobicity, surface microstructure and mechanical properties of films based on untreated and phosphorus oxychloride (POCl(3))-treated zein were evaluated and compared. The effect of POCl(3) treatment on the rheological properties of zein solutions was also studied.

RESULTS

POCl(3) treatment, especially at pH 7 and 9, led to an increase in the apparent viscosity of zein solutions. Atomic force microscopy (AFM) analysis showed that the film based on POCl(3) -treated zein at pH 7 had a stone-like surface microstructure with a higher roughness (R(q)) than the untreated zein film. The AFM data may partially account for the phenomenon that this film exhibited high surface hydrophobicity (H(0)). POCl(3) treatment diminished the tensile strength (TS) of zein films from 4.83-6.67 to 1.3-2.29 MPa. However, the elongation at break (EAB) of the films at pH 7 and 9 increased from 3.0-4.5% (control film) to 150.1-122.7% (POCl(3) -treated film), indicating the potential application of zein films in wrapping foods or in non-food industries such as sugar, fruit or troche that need good extension packing materials.

CONCLUSION

The data presented suggest that the properties of zein films could be modulated by chemical phosphorylation treatment with POCl(3) at an appropriate pH value.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Wu LY
College of Food Science and Engineering, JiangXi Agricultural University, Nanchang 330045, China.
Wen QB
No affiliation info available
Yang XQ
No affiliation info available
Xu MS
No affiliation info available
Yin SW
No affiliation info available

MeSH

Biodegradation, EnvironmentalCellophaneFood HandlingHydrophobic and Hydrophilic InteractionsMechanical PhenomenaMicroscopy, Atomic ForcePhosphorus CompoundsPhosphorylationRheologySurface PropertiesTensile StrengthViscosityWettabilityZea maysZein

Pub Type(s)

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

Language

eng

PubMed ID

21328362

Citation

Wu, Lei-Yan, et al. "Wettability, Surface Microstructure and Mechanical Properties of Films Based On Phosphorus Oxychloride-treated Zein." Journal of the Science of Food and Agriculture, vol. 91, no. 7, 2011, pp. 1222-9.
Wu LY, Wen QB, Yang XQ, et al. Wettability, surface microstructure and mechanical properties of films based on phosphorus oxychloride-treated zein. J Sci Food Agric. 2011;91(7):1222-9.
Wu, L. Y., Wen, Q. B., Yang, X. Q., Xu, M. S., & Yin, S. W. (2011). Wettability, surface microstructure and mechanical properties of films based on phosphorus oxychloride-treated zein. Journal of the Science of Food and Agriculture, 91(7), 1222-9. https://doi.org/10.1002/jsfa.4303
Wu LY, et al. Wettability, Surface Microstructure and Mechanical Properties of Films Based On Phosphorus Oxychloride-treated Zein. J Sci Food Agric. 2011;91(7):1222-9. PubMed PMID: 21328362.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Wettability, surface microstructure and mechanical properties of films based on phosphorus oxychloride-treated zein. AU - Wu,Lei-Yan, AU - Wen,Qi-Biao, AU - Yang,Xiao-Quan, AU - Xu,Ming-Sheng, AU - Yin,Shou-Wei, Y1 - 2011/02/15/ PY - 2010/05/27/received PY - 2010/12/11/revised PY - 2010/12/13/accepted PY - 2011/2/18/entrez PY - 2011/2/18/pubmed PY - 2012/2/22/medline SP - 1222 EP - 9 JF - Journal of the science of food and agriculture JO - J Sci Food Agric VL - 91 IS - 7 N2 - BACKGROUND: Zein, the predominant protein in corn, has been extensively studied as an alternative packaging material in edible and biodegradable films. However, films made from 100% zein are brittle under normal conditions. The aim of this investigation was to improve the film-forming properties of zein by chemical phosphorylation. The surface hydrophobicity, surface microstructure and mechanical properties of films based on untreated and phosphorus oxychloride (POCl(3))-treated zein were evaluated and compared. The effect of POCl(3) treatment on the rheological properties of zein solutions was also studied. RESULTS: POCl(3) treatment, especially at pH 7 and 9, led to an increase in the apparent viscosity of zein solutions. Atomic force microscopy (AFM) analysis showed that the film based on POCl(3) -treated zein at pH 7 had a stone-like surface microstructure with a higher roughness (R(q)) than the untreated zein film. The AFM data may partially account for the phenomenon that this film exhibited high surface hydrophobicity (H(0)). POCl(3) treatment diminished the tensile strength (TS) of zein films from 4.83-6.67 to 1.3-2.29 MPa. However, the elongation at break (EAB) of the films at pH 7 and 9 increased from 3.0-4.5% (control film) to 150.1-122.7% (POCl(3) -treated film), indicating the potential application of zein films in wrapping foods or in non-food industries such as sugar, fruit or troche that need good extension packing materials. CONCLUSION: The data presented suggest that the properties of zein films could be modulated by chemical phosphorylation treatment with POCl(3) at an appropriate pH value. SN - 1097-0010 UR - https://www.unboundmedicine.com/medline/citation/21328362/Wettability_surface_microstructure_and_mechanical_properties_of_films_based_on_phosphorus_oxychloride_treated_zein_ L2 - https://doi.org/10.1002/jsfa.4303 DB - PRIME DP - Unbound Medicine ER -