prikaz prve stranice dokumenta Karakterizacija migracijskih tvari iz polikaprolaktonskih nanokompozitnih filmova
Access restricted to students and staff of home institution
master's thesis
Karakterizacija migracijskih tvari iz polikaprolaktonskih nanokompozitnih filmova
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2022. urn:nbn:hr:149:949679
Puhar, Marta
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

Cite this document

Puhar, M. (2022). Karakterizacija migracijskih tvari iz polikaprolaktonskih nanokompozitnih filmova (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:949679

Puhar, Marta. "Karakterizacija migracijskih tvari iz polikaprolaktonskih nanokompozitnih filmova." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:149:949679

Puhar, Marta. "Karakterizacija migracijskih tvari iz polikaprolaktonskih nanokompozitnih filmova." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:149:949679

Puhar, M. (2022). 'Karakterizacija migracijskih tvari iz polikaprolaktonskih nanokompozitnih filmova', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 23 July 2024, https://urn.nsk.hr/urn:nbn:hr:149:949679

Puhar M. Karakterizacija migracijskih tvari iz polikaprolaktonskih nanokompozitnih filmova [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2022 [cited 2024 July 23] Available at: https://urn.nsk.hr/urn:nbn:hr:149:949679

M. Puhar, "Karakterizacija migracijskih tvari iz polikaprolaktonskih nanokompozitnih filmova", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:149:949679

Metadata
TitleKarakterizacija migracijskih tvari iz polikaprolaktonskih nanokompozitnih filmova
Title (english)Characterization of migrated substances from polycaprolactone nanocomposite films
AuthorMarta Puhar
MentorZlata Hrnjak-Murgić (mentor)
Committee memberZlata Hrnjak-Murgić (predsjednik povjerenstva)
Committee memberZvonimir Katančić (član povjerenstva)
Committee memberMirela Leskovac (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2022-07-15, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Polikaprolakton (PCL) je petrokemijski polimer, no budući da je biorazgradljiv ubraja se u biopolimere te je stoga pogodan za primjenu, kao ambalažni materijal za pakiranje hrane. Kako se u ambalažne materijale danas dodaju i različite aktivne tvari, različitih funkcijskih svojstava, važno je utvrditi mogućnost njihovih migracija u hranu. U tu svrhu, pripremljeni su i karakterizirani polikaprolaktonski nanokompozitni filmovi s dodatkom aktivnih tvari. Kao aktivne tvari korišteni su titanijev (IV) oksid (TiO2), cinkov (II) oksid (ZnO), nanočestice kitozana (NCs) te dopirani TiO2 i ZnO srebrovim ionima: Ti-Ag i Zn-Ag. Nanočestice kitozana (NCs) pripremljene su iz kitozana niskih molekulskih masa (Cs) (50.000-190.000 Da) precipitacijom. Ambalažni polikaprolaktonski nanokompozitni filmovi pripremljeni su iz otopine lijevanjem u kalupe presvučene teflonom. Polikaprolaktonski nanokompozitni filmovi (PCL/NCs/Zn, PCL/Zn-Ag, PCL/NCs/Zn-Ag, PCL/NCs/Zn-Ag-h, PCL/NCs/TiO2, PCL/Ti-Ag, PCL/NCs/Ti-Ag i PCL/NCs/Ti-Ag-h ) karakterizirani su metodama: FTIR analizom, pretražnom elektronskom mikroskopijom (SEM), difuznom refleksijskom spektroskopijom (DRS), određivanjem ukupnih te specifičnih migracija induktivno spregnutom plazmom s masenom spektrometrijom (ICP-MS). Provedenim ispitivanjima ustanovljeno je da PCL nanokompozitni filmovi pripremljeni s TiO2 zadovoljavaju uvjete o zdravstvenoj ispravnosti materijala koji dolaze u dodir s hranom, za sve vrste hrane dok PCL nanokompozitni filmovi pripremljeni s ZnO nisu prikladni za pakiranje hrane čija je pH vrijednost niža od 4,5 kako je to vidljivo iz specifičnih migracija (SM).
Abstract (english)
Polycaprolactone (PCL) is a petrochemical polymer, due to biodegradability it belongs to the group of biopolymers, therefore it is suitable for use as a food packaging material. As different active substances with different functional properties are added to packaging materials today, it is important to determine the possibility of their migration into food. For this purpose, polycaprolactone films with addition of active substances were prepared and characterized. As active compounds titanium dioxide (TiO2), zinc oxide (ZnO), chitosan nanoparticles (NCs) and doped TiO2 and ZnO with silver ions: Ti-Ag and Zn-Ag were used. Chitosan nanoparticles were prepared from low molecular weight (Cs) chitosan (50.000-190.000 Da) by precipitation. Polycaprolactone films were prepared from PCL solution by dispersing active components and pouring into Teflon molds. Polycaprolactone nanocomposite films were characterized by several techniques. FTIR spectroscopy, scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS) and overall migration limit (OML) as well as specific migration (SM) has been determined by inductively coupled plasma by mass spectrometry (ICP-MS). From the results in the study, it was established that PCL nanocomposite films prepared with TiO2 meet the health requirements of materials that come into contact with food, for all types of food, while PCL nanocomposite films prepared with ZnO are not suitable for packaging a food with a pH value lower than 4,5 as this is evident from specific migrations (SM) results.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:949679
Study programmeTitle: Materials Science and Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2023-03-10 14:20:19