Utjecaj anorganskih kiselina na taloženje nanočestica srebra stabiliziranih poli(akrilnom kiselinom)

master's thesis

• Title (english): Inorganic acid influence on precipitation of nanosilver particles stabilized by poly(acrylic acid)
• Author: Matej Zlatar
• Mentor: Stjepan Milardović (mentor)
• Committee member: Stjepan Milardović (predsjednik povjerenstva)
• Committee member: Petar Kassal (član povjerenstva)
• Committee member: Marijana Kraljić Roković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2019-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Cilj ovog rada bila je sinteza nanočestica srebra metodom kemijske redukcije vodene otopine srebrovog (I) nitrata. Kao redukcijsko sredstvo korišten je hidrazin hidrat, dok je za stabilizaciju dobivenih nanočestica korištena poli(akrilna kiselina). Promatran je utjecaj perklorne, fosforne, sumporne i oksalne kiseline koncentracija 0,01 i 0,1 M na taloženje čestica i količinu adsorbiranog stabilizatora. Ispitivana je stabilnost dobivenih formulacija vodljivih tinti u Britton – Robinsonovim puferima u rasponu pH vrijednosti od 10,00 do 3,50. Nadalje, provedena je i elektrokemijska karakterizacija metodom cikličke voltametrije, i spektrofotometrijska karakterizacija UV-Vis spektroskopijom kako bi se odredile pKa vrijednosti poli(akrilne kiseline) adsorbirane na dobivene nanočestice.

Abstract (english)

The aim of this study was to synthesize silver nanoparticles by chemical reduction method of silver (I) nitrate. Hydrazine hydrate was used as a reducing agent and obtained nanoparticles were stabilized with poly(acrylic acid). The effect of 0,01 and 0,1 M perchloric, phosphorous, sulfuric and oxalic acid on particle deposition and amount of adsorbed stabilizer was studied. Furthermore, the stability of the resulting conductive ink formulations in Britton – Robinson buffers, ranged from pH 10,00 to 3,50, was tested. Electrochemical characterization by cyclic voltammetry and spectrophotometric characterization by UV-Vis spectroscopy was performed to determine the pKa values of poly(acrylic acid) adsorbed on the silver nanoparticles.

• Keywords: ciklička voltametrija; UV-Vis spektroskopija; nanočestice srebra; polielektroliti; poli(akrilna kiselina); jake anorganske kiseline
• Keywords (english): cyclic voltammetry; UV-Vis spectroscopy; silver nanoparticles; polyelectrolytes; poly(acrylic acid); strong inorganic acids
• Language: croatian
• URN:NBN: urn:nbn:hr:149:570964
• Study programme: Title: Materials Science and Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-02-27 21:37:34