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master's thesis
Toplinska svojstva i razgradnja PAK/TiO2 nanokompozita
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. urn:nbn:hr:149:530558
Beloša, Maja
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

Beloša, M. (2017). Toplinska svojstva i razgradnja PAK/TiO2 nanokompozita (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:530558

Beloša, Maja. "Toplinska svojstva i razgradnja PAK/TiO2 nanokompozita." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:149:530558

Beloša, Maja. "Toplinska svojstva i razgradnja PAK/TiO2 nanokompozita." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:149:530558

Beloša, M. (2017). 'Toplinska svojstva i razgradnja PAK/TiO2 nanokompozita', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 25 January 2025, https://urn.nsk.hr/urn:nbn:hr:149:530558

Beloša M. Toplinska svojstva i razgradnja PAK/TiO2 nanokompozita [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2017 [cited 2025 January 25] Available at: https://urn.nsk.hr/urn:nbn:hr:149:530558

M. Beloša, "Toplinska svojstva i razgradnja PAK/TiO2 nanokompozita", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:149:530558

Metadata
TitleToplinska svojstva i razgradnja PAK/TiO2 nanokompozita
Title (english)Thermal properties and degradation of PAK/TiO2 nanocomposites
AuthorMaja Beloša
MentorSanja Lučić Blagojević (mentor)
Committee memberSanja Lučić Blagojević (predsjednik povjerenstva)
Committee memberZrinka Buhin Šturlić (član povjerenstva)
Committee memberDomagoj Vrsaljko (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2017-09-28, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Chemical Engineering in Material Development
Abstract
Vodeni poliakrilatni premazi koriste se kao zaštitni premazi u drvnoj industriji s ciljem usporavanja površinske razgradnje drva. S obzirom da nanočestice titanijevog dioksida mogu djelovati kao UV apsorberi te se dodaju premazima kako bi poboljšali primjenska svojstva takvih zaštitnih premaza. Poliakrilat/TiO2 sustavi sintetizirani su in situ emulzijskom polimerizacijom i ex situ postupkom priprave s koncentracijama koloidne disperzije TiO2 (CCR 200 Mn) od 0,5 %, 0,7 %, 1,0 %, 1,5 %, 2,0 % masenih prema masi monomera. S obzirom na način obrade, korištena su dva različita oblika titanijevog dioksida (CCR 200 Mn i CCR 150) u koncentraciji 0,7 % . Nakon sinteze vodenih poliakrilatnih emulzija, pripravljeni su filmovi koji su zatim izloženi UV zračenju u trajanju od tri tjedna. Prije i poslije izlaganja UV zračenju provedena su istraživanja toplinskih svojstava filmova diferencijalnom pretražnom kalorimetrijom (DSC), termogravimetrijskom analizom (TGA) te im je ispitana toplinska vodljivost. Rezultati su pokazali da TiO2 punilo u sustavima utječe na promjenu temperature staklišta, indukcijsko oksidacijsku temperaturu i toplinsku stabilnost prije i nakon djelovanja UV zračenja. Toplinska svojstva sustava s punilom poboljšana su u odnosu na čistu PAK matricu, što više dolazi do izražaja kod sustava pripravljenih in situ emulzijskom polimerizacijom. In situ emulzijskom polimerizacijom postignuta je bolja dispergiranost punila u poliakrilatnoj matrici. Dodatak punila nije pokazao značajan utjecaj na toplinsku vodljivost i difuzivnost.
Abstract (english)
Water-based polyacrylate coatings can be applied as protective coatings on many kinds of wood products in order to slow down its surface degradation as much as possible. Adding TiO2 nanoparticles to the coating can significantly affect its thermal properties. TiO2 has attracted increased attention in recent years in view of its properties, including intensive UV light absorption. In situ emulsion polymerization and ex situ preparation was used to prepare polyacrylate/TiO2 systems with concentracion of TiO2 colloidal dispersion (CCR 200 Mn) with 0.5 %, 0.7 %, 1.0 %, 1.5 %, 2.0 % mass of filler per mass of monomers. Considering the filler modificatrion, two types of titanium dioxide were used (CCR 200 Mn i CCR 150) in concentration 0.7 %. From prepared water-based polyacrylate emulsions films were prepared and films were exposed to UV radiation for three weeks. Before and after UV exposure the films were characterized by differential scanning calorimetry analysis (DSC), thermogravimetric analysis (TGA) and thermal conductivity was determined. The results showed that TiO2 nanoparticles in polyacrylate systems changed glass transition temperature, oxidation induction temperature and thermal stability before and after UV radiation. Thermal properties of polyacrylate/TiO2 systems are generally improved in relation to polyacrilate without TiO2. Improvement is more pronaunced in systems prepared with in situ emulsion polymerization. Addition of TiO2 nanoparticles has not influence on thermal conductivity and diffusivitty.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:530558
Study programmeTitle: Chemical 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
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Created on2020-04-29 12:32:48