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undergraduate thesis
Priprema biorazgradljivih kompozita na osnovi LLDPE i rižinih ljuskica
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. urn:nbn:hr:149:588557
Cvetić, Martin
University of Zagreb
Faculty of Chemical Engineering and Technology

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

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Cvetić, M. (2018). Priprema biorazgradljivih kompozita na osnovi LLDPE i rižinih ljuskica (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:588557

Cvetić, Martin. "Priprema biorazgradljivih kompozita na osnovi LLDPE i rižinih ljuskica." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:588557

Cvetić, Martin. "Priprema biorazgradljivih kompozita na osnovi LLDPE i rižinih ljuskica." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:588557

Cvetić, M. (2018). 'Priprema biorazgradljivih kompozita na osnovi LLDPE i rižinih ljuskica', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:588557

Cvetić M. Priprema biorazgradljivih kompozita na osnovi LLDPE i rižinih ljuskica [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2018 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:149:588557

M. Cvetić, "Priprema biorazgradljivih kompozita na osnovi LLDPE i rižinih ljuskica", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:149:588557

Metadata
TitlePriprema biorazgradljivih kompozita na osnovi LLDPE i rižinih ljuskica
Title (english)Preparation of biodegradable composites based on LLDPE and rice husks
AuthorMartin Cvetić
MentorEmi Govorčin Bajsić (mentor)
Committee memberEmi Govorčin Bajsić (predsjednik povjerenstva)
Committee memberLjerka Kratofil Krehula (član povjerenstva)
Committee memberVeljko Filipan (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2018-09-21, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Chemical Engineering in Material Development
Abstract
Sve se više dovodi u pitanje problem vezan uz odlaganje plastičnog otpada, a znanstvenici nastoje pronaći adekvatno rješenje s ciljem boljeg očuvanja i zaštite okoliša. U ovom eksperimentalnom radu pripravljeni su biokompoziti na osnovi LLDPE i rižinih ljuskica (RLJ) u svrhu dobivanja ambalažnog materijala. Biokompoziti su pripravljeni u Brabender gnjetilici dodatkom rižinih ljuskica u LLDPE u različitom masenom postotku (10, 20, 30, 40, 50 mas %). Uzorcima je ispitana toplinska stabilnost TGA tehnikom s obzirom na dodatak RLJ i njihovog udjela u bikompozitu LLDPE / RLJ. DSC tehnikom određeni su fazni prijelazi, dok su dinamičko mehaničkom analizom (DMA) određene primarne viskoelastične funkcije (modul pohrane (E'), modul gubitka (E'')). Na osnovi dobivenih rezultata može se zaključiti kako dodatkom i povećanjem udjela RLJ u biokompozitu stupanj kristalnosti raste kod manjeg udjela RLJ (10, 20 mas %) gdje RLJ djeluju kao nukleacijski agens, no povećanjem udjela RLJ (30, 40, 50 mas %) stupanj kristalnosti opada, a u tom slučaju sadržaj silike iz RLJ narušava kristalnu strukturu. Povećanjem udjela RLJ u biokompozitu bilježi se pad toplinske stabilnosti materijala što se očituje u temperaturi početka razgradnje (Tp) koja poprima niže vrijednosti što znači da do razgradnje dolazi pri nižim temperaturama. Rezultati dobiveni DMA analizom ukazuju na sniženje staklišta (Tg) dodatkom RLJ što znači da ne dolazi do uspostavljanja interakcija između LLDPE i RLJ.
Abstract (english)
The question of disposal of plastic waste is increasingly questioned, and scientists are trying to find an adequate solution for better conservation and environmental protection. In this experimental work biocomposites based on LLDPE and rice husk (RH) were prepared for the purpose of obtaining packaging material. Biocomposites were prepared by laboratory Brabender mixer by adding rice husks in LLDPE with different content of rice husk (10, 20, 30, 40, 50 wt %). The samples was examined to the thermal stability with TGA technique with respect to the addition of RH and their proportion in LLDPE / RH biocoposite. By DSC techniques was obtained phase transitions, while by dynamic mechanical analysis (DMA) was determined primary viscoelastic functions (storage modulus (E'), loss modulus (E'')). Based on the obtained results, it can be concluded that by adding and increasing the RH content in biocomposites, the degree of crystallinity increases for the biocomposites with a smaller content of rice flakes (10, 20 wt %) where RH acts as nucleation agents but if the content of rice husk become higher (30, 40, 50 wt %) , the crystallinity decreases, and in that case the silica from the rice husks disrupts the crystal structure. The results obtained by DMA analysis show a decrease of glass transition temperature by the addition of RH meaning that there is no interaction between LLDPE and RH.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:588557
Study programmeTitle: Materials Science and Engineering - Undergraduate study
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2022-07-08 13:38:07