UV stabilnost termokromne boje

Čerina, Petra (2014) UV stabilnost termokromne boje. Baccalaureus work - Undergraduate programme. Grafički fakultet. [Mentor: Rožić, Mirela].

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Abstract

Cilj ispitivanja je utvrditi utjecaj prirodnog zeolita klinoptilolita kao punila u papiru na UV stabilnost termokromne boje. Laboratorijski listovi pripremljeni su uz dodatak 20% punila (kalcijev karbonat i zeolit). Prirodni zeolit dodavan je kalcijevom karbonatu u različitim masenim udjelima (20 i 60%). Laboratorijski listovi pripremljeni su u skladu s ISO 5269-1. Za izradu otisaka korišten je laboratorijski uređaj IGT A2. Uzorci su bili izloženi procesu umjetnog starenja u komori za starenje Solarbox 1500e (CO.FO.ME.GRA) u različitim vremenskim intervalima tijekom 40 sati. (E,a*,b*,c*,L*) promjene ovisno o vremenu ubrzanog starenja vrlo su velike već nakon 1 sata. Najmanje (E,a*,b*,c*,L*) promjene dobivene su u uzorku s 20% klinoptilolita, a najveće u uzorku sa 60% klinoptilolita. Klinoptilolit kao punilo povoljno utječe na UV stabilnost termokromne boje u manjim koncentracijama, a u većim koncentracijama najvjerojatnije dolaze do izražaja fotokatalitička oksidacijska svojstva prisutnih Fe-oksida u uzorku prirodnog zeolita.

Item Type:	Baccalaureus work - Undergraduate programme
Mentor name:	Rožić, Mirela
Defence date:	18 September 2014
Abstract in english:	The aim of the test was to determine the effect of natural zeolite clinoptilolite as a filler in paper onto stability of UV termochromic color. Laboratory sheets were prepared by adding 20% of filler (calcium carbonate and zeolite). Natural zeolite was added to the calcium carbonate in various proportions by weight (20 to 60%). Laboratory sheets have been prepared in accordance with ISO 5269-1. To create prints, the laboratory device IGT A2 was used. The samples were subjected to artificial aging process in chamber aging Suntest XLS + at various intervals for 40 hours. (E, a *, b *, c *, L *) changes depending on the time of accelerated aging are very large, about after 1 hour. The smallest (E, a *, b *, c *, L *) changes are expected in the sample with 20% clinoptilolite, and the largest in the sample with 60% clinoptilolite. Clinoptilolite as filler has beneficial effect on the UV stability of termochromic colors in lower concentrations, and higher concentrations likely to come to the fore oxidation properties of Fe-oxides present in the sample of natural zeolite.
Uncontrolled Keywords:	UV stabilnost, termokromne boje, zeolit, klinoptilolit, kalcijev karbonat
Keywords in english:	UV stability, termochromic color, zeolite, clinoptilolite, calcium carbonate
Subjects:	TECHNICAL SCIENCES > Graphic Technology
Institution:	Grafički fakultet
City:	Zagreb
Number of Pages:	36
Callnumber:	rož 2014 čer
Inventory number:	Z542
Depositing User:	Antonia Grgurović
Status:	Unpublished
Date Deposited:	22 Sep 2014 12:13
Last Modified:	22 Sep 2014 12:13
URI:	http://eprints.grf.unizg.hr/id/eprint/2104

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