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Improved mechanical property and water resistance of zein films by plasticization with tributyl citrate.
J Agric Food Chem. 2012 Jun 13; 60(23):5988-93.JA

Abstract

Pure zein film is intrinsically rigid and brittle and lacks necessary mechanical properties for industrial processing. In addition, pure zein film is sensitive to high relative humidity, which limits its application in food packaging. To improve these properties, tributyl citrate (TBC) was incorporated into zein film to the mass ratios from 10% to 50%. A significant decrease in Young's modulus was observed, from 409.86 MPa in pure zein films to 136.29 MPa in zein films with 50% TBC. Among all films, those containing 10% TBC are most flexible and toughest. Both DSC and microscopy methods suggested that the TBC may be loaded up to 20% to avoid microsized phase separation. Through modeling with experimental data, incorporating 50% TBC reduced the water absorption capacity to 12.94% compared to 31.78% by pure zein film. More importantly, the integrity of zein/TBC film was maintained at high relative humidity and even after immersion in water. However, more than 20% TBC in zein films led to microsized phase separation, which was harmful to mechanical properties.

Authors+Show Affiliations

Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, New Jersey 08901, United States.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22568474

Citation

Shi, Ke, et al. "Improved Mechanical Property and Water Resistance of Zein Films By Plasticization With Tributyl Citrate." Journal of Agricultural and Food Chemistry, vol. 60, no. 23, 2012, pp. 5988-93.
Shi K, Yu H, Lakshmana Rao S, et al. Improved mechanical property and water resistance of zein films by plasticization with tributyl citrate. J Agric Food Chem. 2012;60(23):5988-93.
Shi, K., Yu, H., Lakshmana Rao, S., & Lee, T. C. (2012). Improved mechanical property and water resistance of zein films by plasticization with tributyl citrate. Journal of Agricultural and Food Chemistry, 60(23), 5988-93. https://doi.org/10.1021/jf3001444
Shi K, et al. Improved Mechanical Property and Water Resistance of Zein Films By Plasticization With Tributyl Citrate. J Agric Food Chem. 2012 Jun 13;60(23):5988-93. PubMed PMID: 22568474.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Improved mechanical property and water resistance of zein films by plasticization with tributyl citrate. AU - Shi,Ke, AU - Yu,Hailong, AU - Lakshmana Rao,Seema, AU - Lee,Tung-Ching, Y1 - 2012/05/30/ PY - 2012/5/10/entrez PY - 2012/5/10/pubmed PY - 2014/7/19/medline SP - 5988 EP - 93 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 60 IS - 23 N2 - Pure zein film is intrinsically rigid and brittle and lacks necessary mechanical properties for industrial processing. In addition, pure zein film is sensitive to high relative humidity, which limits its application in food packaging. To improve these properties, tributyl citrate (TBC) was incorporated into zein film to the mass ratios from 10% to 50%. A significant decrease in Young's modulus was observed, from 409.86 MPa in pure zein films to 136.29 MPa in zein films with 50% TBC. Among all films, those containing 10% TBC are most flexible and toughest. Both DSC and microscopy methods suggested that the TBC may be loaded up to 20% to avoid microsized phase separation. Through modeling with experimental data, incorporating 50% TBC reduced the water absorption capacity to 12.94% compared to 31.78% by pure zein film. More importantly, the integrity of zein/TBC film was maintained at high relative humidity and even after immersion in water. However, more than 20% TBC in zein films led to microsized phase separation, which was harmful to mechanical properties. SN - 1520-5118 UR - https://www.unboundmedicine.com/medline/citation/22568474/Improved_mechanical_property_and_water_resistance_of_zein_films_by_plasticization_with_tributyl_citrate_ L2 - https://doi.org/10.1021/jf3001444 DB - PRIME DP - Unbound Medicine ER -