Obstojnost odtisov funkcionalnih barv

Pečnik, Lovro (author), Muck, Deja (mentor)

Namen diplomske naloge z naslovom Obstojnost odtisov funkcionalnih barv je bil podrobneje spoznati področje tiskane elektronike, primerjati prevodne barve z dielektrično tiskarsko barvo in preveriti ter med seboj primerjati obstojnost njihovih odtisov na različne tiskovne materiale. Odločili smo se, da med seboj analiziramo odtise, narejene s tehniko sitotiska, treh različnih funkcionalnih tiskarskih barv, in sicer UV sušeče dielektrične tiskarske barve, UV sušeče prevodne tiskarske barve in termo sušeče prevodne tiskarske barve. Odtisi so bili izdelani na papirju iz japonskega dresnika, belem specialnem papirju in foliji za tiskano elektroniko. Prav tako smo naredili pretiske, in sicer UV sušeče dielektrične barve na predhodno odtisnjene prevodne barve. Izvedli smo osem raziskovalnih metod. Merili smo L* a* b* vrednosti, ki smo jih uporabili pri testu za ugotavljanje svetlobne obstojnosti s filtrirano svetlobo ksenonske žarnice in določanju obstojnosti odtisov na različne dejavnike. Poleg teh treh meritev smo merili tudi hrapavost, adhezijo, upornost različno širokih prevodnih linij, upornost prevodnih linij po zgibu in odpornost na drgnjenje. Analiza je pokazala, da so vzorci, odtisnjeni s termo sušečo prevodno tiskarsko barvo, najbolj svetlobno obstojni in dosegajo najvišjo stopnjo prevodnosti med vsemi testiranimi vzorci. Prevodnost po zgibu malenkost pade pri skoraj vseh vzorcih. Ugotovili smo tudi, da je na vodo najbolj odporna termo sušeča prevodna tiskarska barva, na detergent in olje pa UV sušeča prevodna tiskarska barva. Adhezivnost odtisov se med različnimi vzorci zelo razlikuje, najslabše rezultate pa smo dobili pri pretiskih. Pri merjenju hrapavosti odtisov je bilo ugotovljeno, da vrsta tiskarske barve ne vpliva preveč na hrapavost odtisov, pomembnejša je izbira tiskovnega materiala. Na drgnjenje so bili najbolje odporni vzorci, odtisnjeni z UV sušečo dielektrično tiskarsko barvo.

• Language: Slovenian
• Keywords: tiskana elektronika, prevodna tiskarska barva, obstojnost odtisov
• Work type: Bachelor thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2021
• PID: 20.500.12556/RUL-133326
• Publication date in RUL: 22.11.2021

Secondary language

• Language: English
• Title: Durability of prints of funkctional inks

Abstract

The purpose of the thesis which is entitled Durability of prints of funcktional inks was to learn more about printed electronics and to compare conductive inks with dielectric ink along with the checking and comparing the durability of inks on different materials. We decided to analyze the prints of three different functional printing inks (UV curable dielectric ink, UV curable conductive ink and thermal drying conductive ink) all made with the screen- printing technique. For printing materials we used Japanese knotweed paper, white special paper and foil for printed electronics. We also printed the UV curable dielectric ink on both of the two pre-printed conductive ink to make the overprint. We did eight research methods. We performed eight different research methods. We measured the L* a* b* values used for Assessment of light fastness using filtered xenon arc light and to determine resistance to various factors. In addition to these three methods, we also measured roughness, adhesion, resistance of conductive lines of different widths, resistance of conductive lines after folding and rubbing resistance. Analysis showed that the prints which were printed with the thermal drying conductive ink had the highest level of light durability and conductivity among all the tested samples. Conductivity has slightly reduced on almost all samples after folding. We discovered that thermal drying conductive ink had the highest level of water resistance and the UV curable conductive ink had the highest level of oil and detergent resistance. Addhesiveness differs a lot among all the samples and the worst results were made by the overprints. We found out that the type of ink had no major affect on the roughness and that chosing the right material in more important. UV curable dielectric ink had the highest level of rubbing resistance.

• Keywords: printed electronics, conductive inks, durability of prints