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dc.contributor.advisorTihminlioğlu, Fundaen
dc.contributor.authorAtik, İsa Doğanen
dc.date.accessioned2014-07-22T13:52:30Z
dc.date.available2014-07-22T13:52:30Z
dc.date.issued2007en
dc.identifier.urihttp://hdl.handle.net/11147/3841
dc.descriptionThesis (Master)--Izmir Institute of Technology, Chemical Engineering, Izmir, 2007en
dc.descriptionIncludes bibliographical references (leaves: 86-93)en
dc.descriptionText in English; Abstract: Turkish and Englishen
dc.descriptionxiii, 105 leavesen
dc.description.abstractThe plasticized corn-zein coatings on polypropylene (PP) films as an alternative to multilayer packaging films consisting of non-degradable polymers were prepared to evaluate barrier, mechanical, thermal, surface and optical properties of the resulting coated film, as affected by coating formulation (solvent, corn-zein, plasticizer concentration, and plasticizer type). PP films coated with corn zein were obtained through a simple solvent casting method. Corn-zein with different amounts (5% and 15%) was dissolved in 70% and 95% aqueous ethanol solution at 50oC, respectively. Solutions of corn-zein plasticized by polyethylene glycol (PEG) and glycerol (GLY) with various levels (20% and 50%) were applied on corona-discharged-treated PP film. The resulting corn-zein coated PP films showed good appearance, flexibility and adhesion between the coating and the base film. The coated PP films showed a significant (P<0.05) increase in barrier (water and oxygen) properties and improvement in mechanical properties when coating formulation consisted of higher corn-zein content and lower amount of GLY as plasticizer. Furthermore, zein coating increased the service temperature range of the PP films, and promised good printability on the surface due to contact angle results. The statistical analysis defined that the key parameters of coating formulation that had major effect on the final properties of coated PP films as corn-zein concentration, plasticizer concentration, and plasticizer type while ethanol concentration was found to be as less effective parameter compared to others. In conclusion, corn zein coatings with appropriate formulation on PP films could have potential as an alternative to conventional synthetic coatings for food packaging applications.en
dc.language.isoengen
dc.publisherIzmir Institute of Technologyen
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subject.lccTP374. A87 2007en
dc.subject.lcshFood--Packagingen
dc.subject.lcshBiodegradable productsen
dc.subject.lcshBiopolymersen
dc.subject.lcshPlant proteinsen
dc.subject.lcshCornen
dc.subject.lcshPolypropyleneen
dc.subject.lcshThin filmsen
dc.titlePreparation and characterization of corn zein coated polypropylene (PP) films for food packaging applicationsen
dc.typemasterThesisen
dc.contributor.departmentIzmir Institute of Technology. Chemical Engineeringen
dc.relation.publicationcategoryTezen_US


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