UTJECAJ BIOADITIVA NA SVOJSTVA AMBALAŽNOG MATERIJALA

Scientific paper - Original scientific paper

• Title (english): BIOADDITIVE INFLUENCE ON THE PROPERTIES OF PACKAGING MATERIALS
• Author: Anita Ptiček Siročić
• Author: Marko Omazić
• Author: Zlata Hrnjak-Murgić
• Author's institution: University of Zagreb; Faculty of Chemical Engineering and Technology
• Author's institution: University of Zagreb; Faculty of Geotechnical Engineering; (Department of Water Management)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract (croatian)

U ovom su radu ispitivani uzorci ambalažnih polietilenskih (PE-LD) filmova kojima su dodani različiti prirodni konzervansi (cimet, zeleni čaj, ružmarin i đumbir). PE-LD filmovi dobiveni su prešanjem na hidrauličnoj preši Dake pri 120 °C. Toplinska stabilnost uzoraka praćena je termogravimetrijskom analizom (TGA) u struji dušika (protok 100 ml/min) kod brzine zagrijavanja od 10 °C/min u temperaturnom intervalu od 25 do 600 °C. Uzorcima su određena mehanička svojstva (prekidna čvrstoća i prekidno istezanje) te je ispitana njihova postojanost na djelovanje mikroorganizama. Rezultati mehaničkih svojstava pokazuju smanjenje prekidnog istezanja u odnosu na čisti polietilen, ali i povećanje vrijednosti prekidne čvrstoće kod nekih uzoraka. Iz rezultata je vidljivo da dodatak bioaditiva polietilenskim filmovima povećava njihovu toplinsku postojanost, a da najveću antimikrobnu aktivnost pokazuje uzorak polietilenskog filma pripremljenog s cimetom.

Abstract (english)

In this work polyethylene (PE-LD) films containing various natural preservatives (cinnamon, green tea, rosemary and ginger) were studied. Polyethylene films, which is used as packaging material, were prepared by hydraulic Dake press at 120 °C. Thermal stability of the samples was monitored by thermogravimetric analysis (TGA) in nitrogen flow rate of 100 ml/min at heating rate of 10 °C/min in temperature range from 25 to 600 °C. Mechanical properties of samples were also determined (tensile strength and elongation at break) and their resistance to the action of microorganisms was tested. Results of mechanical properties show the decrease of the values of elongation at break and slight increase of tensile strength in comparison to pure polyethylene. The results show that the addition of bioadditives in polyethylene films increases their thermal stability and the highest antimicrobial activity shows sample prepared with cinnamon.

• Keywords (croatian): ambalažni materijali; polietilen; bioaditivi; toplinska svojstva; antimikrobna aktivnost
• Keywords (english): packaging materials; polyethylene; bioadditives; thermal properties; antimicrobial activity
• Language: croatian
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review
• Publication version: Published version
• Journal title: Inženjerstvo okoliša
• Numbering: vol. 1, no. 1, pp. 19-23
• p-ISSN: 1849-4714
• e-ISSN: 1849-5079
• URN:NBN: urn:nbn:hr:130:754012
• Publication: 2014-07-28
• Document URL: http://hrcak.srce.hr/129442
• Type of resource: Text
• Access conditions: Open access
• Created on: 2017-02-09 11:27:00