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Journal on Processing and Energy in Agriculture
2017, vol. 21, br. 1, str. 9-12
jezik rada: engleski
vrsta rada: izvorni naučni članak
objavljeno: 12/06/2017
doi: 10.5937/JPEA1701009S
Sinteza i karakterizacija biopolimernih filmova
Univerzitet u Novom Sadu, Tehnološki fakultet

e-adresa: suput.danijela@gmail.com

Projekat

Osmotska dehidratacija hrane - energetski i ekološki aspekti održive proizvodnje (MPNTR - 31055)

Sažetak

U ovom radu sintetisana su tri biopolimerna filma različitog porekla, adekvatnim metodama sinteze. Sintetisani su zeinski i želatinski filmovi (proteinski), kao i skrobni film (polisaharidni). Skrobni i želatinski filmovi su dobijeni iz vodenog filmogenog rastvora, dok je zeinski film dobijen iz alkoholnog rastvora. Dobijeni filmovi su okarakterisani određivanjem mehaničkih i fizičko-hemijskih osobina: debljina, zatezna jačina i izduženje pri kidanju, sadržaj vlage, bubrenje i rastvaranje. Želatinski filmovi su se pokazali kao najčvršći (zatezna jačina 84 N/15mm), dok su zeinski bili najelastičniji (izduženje pri kidanju 41,6%). Izmereni sadržaj vlage je veći kod uzoraka skrobnih filmova u odnosu na zeinske i želatinske, što je posledica načina sinteze i hidrofilne prirode polisaharidnih filmova. Vrednost stepena bubrenja filma iznosila je 22,5% kod uzoraka zeinskog filma, a 90,9% kod uzoraka želatinskog filma, dok su najviše prosečne vrednosti zabeležene kod uzoraka skrobnog filma i iznosile su 840,6%. Skrobni filmovi su najrastvorljiviji u vodi (stepen rastvorljivosti 36,5%), dok je vrednost stepena rastvorljivosti kod zeinskih iznosila 27,9%, a kod želatinskih je bila najmanja i iznosila je 11,8%. Na osnovu dobijenih rezultata konstatuju se različite osobine ispitivanih biopolimernih filmova, koje su posledica različite strukture polazne sirovine, kao i načina sinteze. Sve karakteristike filmova moguće je unaprediti optimizacijom sastava filma, kao i sintezom kompozitnih ili laminiranih filmova u zavisnosti od željene primene.

Ključne reči

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