Ekološki održivi bio-nano kompozitni premaz za zaštitu otisaka

master's thesis

• Author: Ivana Krajnović
• Mentor: Marina Vukoje (mentor)
• Committee member: Rahela Kulčar (član povjerenstva)
• Committee member: Marina Vukoje (član povjerenstva)
• Committee member: Ivana Bolanča-Mirković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Graphic Arts; Zagreb
• Defense date and country: 2021-9-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Graphic Technology

Abstract

Termokromne boje (TCI) mijenjaju obojenje pri promjeni temperature. U grafičkoj

industriji termokromne boje koriste se prvenstveno kod izrade i tiska „pametne“ ambalaže

za prehrambene i farmaceutske proizvode, koja ima funkciju indikatora trenutne

temperature proizvoda ili njegove prekoračene temperaturne tolerancije. Kod skladištenja

i izlaganja takvih proizvoda moguć je dolazak ambalaže u kontakt s raznim kemikalijama,

pri čemu kemijska stabilnost, a time i funkcionalnost termokromnih boja postaje upitna.

Polikaprolakton (PCL) je biorazgradivi polimer čije karakteristike nalaze upotrebu u nizu

grana industrije. Polikaprolakton može se koristiti kao premaz na otiscima radi

poboljšanja njihove kemijske stabilnosti, a može se koristiti i s dodatkom niskog masenog

udjela cinkovog oksida (ZnO) ili titanijevog dioksida (TiO2) radi boljih svojstava otisaka.

Ovaj rad istražuje utjecaj polikaprolaktona i cinkovog oksida na kemijsku stabilnost i

kolorimetrijske karakteristike reverzibilne termokromne boje na bazi leukobojila za tisak

u ofsetu s aktivacijskom temperaturom od 45°C. Kemikalije čijim će se utjecajem ovaj

rad baviti (voda, sapun, 12%-tni i 96%-tni etanol) izabrane su na temelju procijenjene

mogućnosti da će boja u realnoj primjeni doći u kontakt s njima.

Abstract (english)

Thermochromic inks (TCI) change their colouration with change in temperature. In

graphic industry thermochromic inks are used primarily in making and print of "smart"

packaging for food and pharmaceutical packaging, which functions as an indicator of the

product's current temperature or an out-of-boundary temperature reading. In the process

of storage or display of these products the packaging may come into contact with various

chemicals, which may bring into question the chemical stability and therefore

functionality of thermochromic ink. Polycaprolactone (PCL) is a biodegradable polymer

the characteristics of which find usage in various branches of industry. Polycaprolactone

can be used as a coating on printed products in order to improve their chemical stability,

as well as used alongside a low mass concentration of zinc oxide (ZnO) or titanium

dioxide (TiO2) to further improve the properties of printed products. This paper aims to

analyse the effect of polycaprolactone, zinc oxide and titanium dioxide on the chemical

stability and colourimetric characteristics of a reversible leuco-dye-based thermochromic

ink for use in offset print with the activation temperature of 45°C. The chemicals that this

paper will concern itself with (water, soap, 12% and 96% ethanol solution) are chosen on

the basis of the estimated possibility that the ink may come into contact with them in reallife conditions.

• Keywords: termokromne boje; leuko bojilo; polikaprolakton; cinkov oksid; titanijev dioksid
• Keywords (english): thermochromic ink; leuco dye; polycaprolactone; zinc oxide; titanium dioxide
• Language: croatian
• URN:NBN: urn:nbn:hr:216:197529
• Study programme: Title: Graphic technology; specializations in: Graphic technology, Design of graphic products; Course: Graphic technology; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije (sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-04-18 23:51:14