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master's thesis
Polimerni kompoziti s UV blokirajućim djelovanjem
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. urn:nbn:hr:149:663492
Santini, Paula
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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Santini, P. (2018). Polimerni kompoziti s UV blokirajućim djelovanjem (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:663492

Santini, Paula. "Polimerni kompoziti s UV blokirajućim djelovanjem." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:663492

Santini, Paula. "Polimerni kompoziti s UV blokirajućim djelovanjem." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:663492

Santini, P. (2018). 'Polimerni kompoziti s UV blokirajućim djelovanjem', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:663492

Santini P. Polimerni kompoziti s UV blokirajućim djelovanjem [Master's 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:149:663492

P. Santini, "Polimerni kompoziti s UV blokirajućim djelovanjem", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:149:663492

Metadata
TitlePolimerni kompoziti s UV blokirajućim djelovanjem
Title (english)UV blocking polymer composites
AuthorPaula Santini
MentorLjerka Kratofil Krehula (mentor)
Committee memberLjerka Kratofil Krehula (predsjednik povjerenstva)
Committee memberZlata Hrnjak-Murgić (član povjerenstva)
Committee memberHelena Otmačić Ćurković (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2018-07-11, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Chemical Engineering in Material Development
Abstract
Polimerni kompoziti s UV blokirajućim djelovanjem posebna su vrsta aktivnih polimernih materijala. UV blokiranje se postiže dodavanjem aktivnih komponenti (koje karakterizira funkcijsko svojstvo UV zaštite) u polimernu matricu. U ovom radu, pripremljeni su kompoziti na bazi polietilena niske gustoće (LDPE). Kao punilo, tj. aktivna tvar s potencijalnim svojstvom UV blokiranja, u polimernu su matricu dodani metalni oksidi (TiO2, SiO2 i ZnO) ili isti metalni oksidi uz dodatak srebra. Polimerni kompoziti pripremljeni su u Brabender gnjetilici te su zatim isprešani u folije. Tako pripremljeni uzorci karakterizirani su UV/Vis spektroskopijom, FTIR spektroskopijom, termogravimetrijskom analizom te su im ispitana mehanička i barijerna svojstva. Provedene analize pokazale su kako dodatak nanopunila poboljšava prvotna svojstva čistog polimera te ga čini prikladnim materijalom za ambalažu. Rezultati pokazuju kako dodatak nanopunila u maloj količini može postići zadovoljavajuću UV zaštitu dok dodatak srebra povećava apsorpcijsku moć metalnih oksida te tako polimerne kompozite čini još stabilnijim na UV/Vis zračenje.
Abstract (english)
Polymer composites with UV blocking action are a special type of active polymer materials. UV blocking is achieved by adding active components (with a functional property of UV blocking) to the polymer matrix. In this paper, low density polyethylene (LDPE) composites are prepared. As a filler, i.e. an active substance with potential UV blocking property, metal oxides (TiO2, SiO2 and ZnO) are added to the polymer matrix, or the same metal oxides with the addition of silver. Polymer composites are prepared in Brabender plasticoder and then pressed to obtain a foil. Such prepared samples are characterized by UV/Vis spectroscopy, FTIR spectroscopy, thermogravimetric analysis and their mechanical and barrier properties were examined. The analysis has shown that the nanofiller addition improves the original properties of pure polymers and makes them suitable as packaging materials. The results show that the addition of a nanofiller in a small amount can achieve satisfactory UV protection while the addition of silver increases the absorption power of metal oxides and thus the polymer composites become more stable to UV/Vis radiation.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:663492
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 conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-05-26 13:13:18