UV stabilnost termokromne boje

undergraduate thesis

• Author: Petra Čerina
• Mentor: Mirela Rožić (mentor)
• Committee member: Miroslav Gojo (član povjerenstva)
• Committee member: Mirela Rožić (član povjerenstva)
• Committee member: Sonja Jamnicki Hanzer (član povjerenstva)
• Granter: University of Zagreb; Faculty of Graphic Arts; Zagreb
• Defense date and country: 2014-9-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Graphic Technology

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.

Abstract (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.

• Keywords: UV stabilnost; termokromne boje; zeolit; klinoptilolit; kalcijev karbonat
• Keywords (english): UV stability; termochromic color; zeolite; clinoptilolite; calcium carbonate
• Language: croatian
• URN:NBN: urn:nbn:hr:216:725014
• Study programme: Title: Printing technology, course Technical - technological; Course: Graphic technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka grafičke tehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka grafičke tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-04-16 18:06:57