Properties of Chitosan-Laminated Collagen Film
| العنوان: | Properties of Chitosan-Laminated Collagen Film |
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| المؤلفون: | Nevena Krkić, Vera Lazić, Ljiljana Petrović, Jasna Gvozdenović, Danijela Pejić |
| المصدر: | Food Technology and Biotechnology Volume 50 Issue 4 |
| بيانات النشر: | Faculty of Food Technology and Biotechnology, University of Zagreb, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | kolagenska crijeva, film prevučen kitozanom, fizikalna i mehanička svojstva, esencijalno ulje origana, collagen casings, chitosan film, physical and mechanical properties, oregano essential oil |
| الوصف: | The objective of this study is to determine physical, mechanical and barrier properties of chitosan-laminated collagen film. Commercial collagen film, which is used for making collagen casings for dry fermented sausage production, was laminated with chitosan film layer in order to improve the collagen film barrier properties. Different volumes of oregano essential oil per 100 mL of filmogenic solution were added to chitosan film layer: 0, 0.2, 0.4, 0.6 and 0.8 mL to optimize water vapour barrier properties. Chitosan layer with 0.6 or 0.8 % of oregano essential oil lowered the water vapour transmission rate to (1.85±0.10)·10–6 and (1.78±0.03)·10–6 g/(m2·s·Pa) respectively, compared to collagen film ((2.51±0.05)·10–6 g/(m2·s·Pa)). However, chitosan-laminated collagen film did not show improved mechanical properties compared to the collagen one. Tensile strength decreased from (54.0±3.8) MPa of the uncoated collagen film to (36.3±4.0) MPa when the film was laminated with 0.8 % oregano essential oil chitosan layer. Elongation at break values of laminated films did not differ from those of collagen film ((18.4±2.7) %). Oxygen barrier properties were considerably improved by lamination. Oxygen permeability of collagen film was (1806.8±628.0)·10–14 cm3/(m·s·Pa) and values of laminated films were below 35·10–14 cm3/(m·s·Pa). Regarding film appearance and colour, lamination with chitosan reduced lightness (L) and yellowness (+b) of collagen film, while film redness (+a) increased. These changes were not visible to the naked eye. Svrha je ovoga rada bila odrediti fizikalna i kemijska svojstva, te propusnost kolagenskog filma prevučenog kitozanom. Komercijalni kolagenski film, koji se upotrebljava za izradu crijeva za kobasice, prevučen je kitozanom radi poboljšanja propusnosti. Filmu su dodane različite količine esencijalnog ulja origana (0; 0,2; 0,4; 0,6 i 0,8 mL u 100 mL otopine filma), čime se optimirala njegova propusnost za vodenu paru. Sloj kitozana s dodatkom 0,6 % esencijalnog ulja origana smanjio je transmisiju vodene pare na (1,85±0,10)·10-6, a s dodatkom 0,8 % ulja origana na (1,78±0,03)·10-6 g/(m2·s·Pa), u usporedbi s kolagenskim filmom ((2,51±0,05)·10-6 g/(m2·s·Pa)). Film prevučen kitozanom nije imao bolja mehanička svojstva od kolagenskog filma. Granična se čvrstoća filma prevučenog kitozanom s dodatkom 0,8 % esencijalnog ulja origana smanjila s (54,03±3,77) na (36,29±4,02) MPa. Vrijednosti se istezljivosti kolagenskih filmova nisu razlikovale od onih filmova prevučenih kitozanom. Propusnost je kisika znatno poboljšana dodatkom kitozana, pa je u kolagenskom filmu iznosila (1806,79±628,01)·10-14 cm3/(m·s·Pa), a u filmu prevučenom kitozanom 35·10-14 cm3/(m·s·Pa). Dodatkom su se kitozana promijenili izgled i boja filma, tj. smanjio se intenzitet osvjetljenja (L) i žute (+b) boje, a pojačao intenzitet crvene (+a), što nije bilo vidljivo golim okom. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1334-2606 1330-9862 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=od_______951::e2975e16af1a0c0f99da9726f201aa28 https://hrcak.srce.hr/94518 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.od.......951..e2975e16af1a0c0f99da9726f201aa28 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13342606 13309862 |
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