| Abstract | Konoplja (Cannabis sativa L.) je biljka s identificiranih više od 500 različitih prirodnih spojeva, uključujući i mnoge bioaktivne spojeve (terpeni, polifenoli, alkaloidi) od kojih mnogi imaju ljekovita, antimikrobna, antifungalna svojstva dok su njena vlakna najčvršća prirodna vlakna. Zbog tih karakteristika pogodna je za istraživanja u svrhu pronalaska alternativnih pakiranja u vidu jestivih filmova koji su dobra alternativa plastici. Ovo istraživanje provedeno je s ciljem karakterizacije jestivih filmova s kitozanom (K), usitnjenim suhim listom konoplje (LK) i proteinom konoplje (PK) te su ispitana i uspoređena njihova fizikalno-kemijska (pH, debljina, topljivost, relativna vlažnost, viskoznost, obojenost, propusnost za svjetlost), mehanička (vlačna čvrstoća, produljenje prije pucanja, Youngov modul) i barijerna (propusnost za vodenu paru, O₂ i CO₂) svojstva te mikroskopski izgled. Filmovi s LK i PK pokazuju slabiju viskoznost, nižu propusnost za O₂ i CO₂, veću propusnost za vodenu paru, manju čvrstoću i veću elastičnost, a film LK najveću nepropusnost za svjetlost. |
| Abstract (english) | Hemp (Cannabis sativa L.) is a plant with more than 500 different natural compounds identified, including bioactive compounds (terpenes, polyphenols, alkaloids), many of which have medicinal, antimicrobial, antifungal properties, while its fibers are the strongest natural fibers. Due to these characteristics, hemp is suitable for research in order to find alternative packaging in the form of edible films, as good alternative to plastics. This research was conducted with the aim of characterizing edible films with chitosan (K), shredded dry hemp leaf (LK) and hemp protein (PK). Their physico chemical (pH, thickness, solubility, relative humidity, viscosity, color, light transmittance), mechanical (tensile strength, elongation before cracking, Young's modulus) and barrier (water vapor permeability, O₂ and CO₂ transmission rates) properties were tested and compared, as well as microscopic appearance. Films with LK and PK showed lower viscosity, lower permeability for O₂ and CO₂, higher permeability for water vapor, lower strength and higher elasticity, and the film LK had the highest impermeability to light. |
