Priprava i testiranje vodljivih nanotinti na bazi kompleksa srebra

undergraduate thesis

• Title (english): Preparation and testing of organic-silver conductive ink
• Author: Josipa Kahlina
• Mentor: Stjepan Milardović (mentor)
• Committee member: Stjepan Milardović (predsjednik povjerenstva)
• Committee member: Petar Kassal (član povjerenstva)
• Committee member: Zoran Mandić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2019-09-20, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Predmet ovog rada bila je priprema vodljivih tinti na bazi amonijakalnog kompleksa srebra(I) i reducirajućih amino alkohola, te praćenje njihove stabilnosti u određenom vremenskom periodu. Napravljene su dvije različite tinte uporabom ishodne otopine diaminosrebra(I) i dva amino alkohola. U prvoj formulaciji kao redukcijsko sredstvo korišten je dietanolamin (DEA), pomiješan s kompleksom srebra(I) u volumnim omjerima 1:1, 1:2 i 2:1. Za drugu tintu korištena je amonijakalna otopina srebra i etanolamina (EA) u istim volumnim omjerima. Za svaku formulaciju napravljene su po dvije skupine otopina, jedna čuvana na sobnoj temperaturi, a druga u hladnjaku. Stabilnost pripremljenih nanotinti praćena je elektrokemijski, metodom cikličke voltametrije. Ciklički voltamogrami snimani su u troelektrodnom sustavu sastavljenom od referentne elektrode (Ag|AgCl|3M KCl||2M NaNO3), radne elektrode (staklasti ugljik, d = 3 mm) i pomoćne elektrode (platina). Kao osnovni elektrolit korišten je amonijakalni pufer (0,1 M NH3/NH4Cl, pH = 10,11). Prije karakterizacije pripravljenih tinti napravljena su preliminarna istraživanja, tj. provedeno je baždarenje radi točnog određivanja koncentracije srebrovih iona u suspenziji. Stabilnost formulacije Ag/DEA praćena je u vremenskom intervalu od četiri tjedna, dok je stabilnost formulacije Ag/EA proučavana tri tjedna.

Abstract (english)

This work is based on preparation and testing of organic silver conductive ink. Decomposition inks were prepared from silver(I) ammonium complex as a precursor, and amino alcohol as a reducing agent. The first formulation was made with diethanolamine (DEA), and the second one with ethanolamine (EA) in various volume fractions (1:1, 1:2 and 2:1). For detailed characterization during the testing period, two sets of ink suspensions were made for each formulation. One bottle was kept at room temperature and one in the refridgerator at 7°C. Stability of the prepared solutions was evaluated by cyclic voltammetry. Obtained voltammograms were recorded in three-electrode system containing a reference electrode (Ag|AgCl|3M KCl||2M NaNO3), glassy carbon working electrode (d = 3 mm), and a platinum counter electrode. Ammonium buffer solution (0,1M NH3, pH = 10,11) was used in all measurements as the primary electrolyte. To determine the concentration of silver ions in the prepared nanoinks, calibration was performed and the linear range obtained. The stability of Ag/DEA formulation was monitored during the time period of four weeks, and the stability of Ag/EA at a time interval of three weeks.

• Keywords: vodljive tinte na bazi kompleksa srebra; ciklička voltametrija; praćenje stabilnosti tinte
• Keywords (english): organic silver conductive ink; cyclic voltammetry; stability testing
• Language: croatian
• URN:NBN: urn:nbn:hr:149:467128
• Study programme: Title: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Applied organic chemistry; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2023-05-24 08:36:41