Sinteza i karakterizacija poli(3,4-etilendioksitiofen) ATRP makroinicijatora

undergraduate thesis

• Title (english): Synthesis and characterization of poly(3,4-ethylenedioxythiophene) ATRP bearing macronitiator
• Author: Patricia Žagar
• Mentor: Zvonimir Katančić (mentor)
• Committee member: Zvonimir Katančić (predsjednik povjerenstva)
• Committee member: Zlata Hrnjak-Murgić (član povjerenstva)
• Committee member: Petar Kassal (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2020-09-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Elektrovodljivi polimeri su organski spojevi koji posjeduju svojstvo elektrovodljivosti. To svojstvo posljedica je karakterističnih konjugiranih dvostrukih veza od kojih su ti polimeri građeni, te uvođenja dopanata u strukturu čime nastaju slobodni nositelji naboja. Zbog elektrovodljivosti, stabilnosti, otpornosti na koroziju, elektrokromizma i ostalih svojstava, primjena elektrovodljivih polimera u područjima poput elektroničkih komponenti, baterija, superkondenzatora i solarnih ćelija naglo je porasla. Zbog svoje biokompatibilnosti sve češća im je primjena i u medicinske svrhe za izradu različitih biosenzora za praćenje zdravlja. Jedan takav elektrovodljivi polimer, koji se sve više koristi, je i poli(3,4-etilendioksitiofen) (PEDOT). Kontroliranim polimerizacijama poput radikalske polimerizacije prijenosom atoma (ATRP) moguće je krojenje svojstava PEDOT-a za specifičnu primjenu. U ovom radu sintetiziran je kemijskom oksidacijskom polimerizacijom PEDOT ATRP makroinicijator, a sinteza se sastojala od dva koraka. U prvom koraku dobiven je funkcionalizirani monomer ThBr, a u drugom makroinicijator polimer PEDOT-Br. Karakterizacija dobivenog uzorka PEDOT-Br provedena je nuklearnom magnetskom rezonancijom (NMR), infracrvenom spektroskopijom s Fourierovom transformacijom.(FTIR), kromatografijom na poroznom gelu (GPC), diferencijalnom pretražnom kalorimetrijom (DSC), termogravimetrijskom analizom (TGA) i određivanjem elektrovodljivost metodom sonde s četiri točke. Dobiveni NMR i FTIR rezultati su pokazali da je ATRP makroinicijator uspješno sintetiziran uz omjer EDOT monomera i funkcionaliziranog ThBr od približno 2:1. Izmjerena molekulska masa je čak 20-ak puta veća od sličnih literaturnih podataka, dok je izmjerena elektrovodljivost značajno manja što ukazuje na potrebu veće kontrole reakcijskih uvjeta u daljnjim istraživanjima.

Abstract (english)

Conductive polymers are organic compounds which possess the property of electroconductivity. This property is a consequence of characteristic conjugated double bonds in these polymers, and introduction of dopants into the structure which form free charge carriers. Application of electroconductive polymers in different technology areas such as electronic circuits, batteries, supercapacitors and solar cells increased rapidly, due to their electroconductivity, stabilty, corrosion resistance, electrochromism and other properties. Because of biocompatibility they are also used in medicine for making health monitoring biosensors. One such polymer is poly(3,4-ethylenedioxythiophene) (PEDOT). By controlled polymerizations such as atom transfer radical polymerization (ATRP) it is possible to tailor properties of PEDOT for specific purpose. In this study, a PEDOT ATRP macroinitiator was synthesized in a two-step chemical oxidative polymerization reaction, forming a functionalized monomer ThBr in first and a polymer PEDOT-Br in the second step, respectively. Characterization was performed by nuclear magnetic resonance (NMR) Fourier transformation infrared spectroscopy (FTIR), Gel-permeation chromatography (GPC), differential scanning calorimetry (DSC) thermogravimetric analysis (TGA) and conductivity measurement with four-point probe method. NMR and FTIR results showed that ATRP macroinitiator was successfully synthesized with the approximate ratio of EDOT monomer and functionalized ThBr of 2:1. Measured molar mass was around 20 times higher than similar literature findings; while conductivity was significantly lower pointing to need for better reaction conditions control in future research.

• Keywords: elektrovodljivi polimeri; poli(3 4-etilendioksitiofen); radikalska polimerizacija prijenosom atoma; makroinicijator; kemijska oksidacijska polimerizacija
• Keywords (english): conductive polymers; poly(3 4-ethylenedioxythiophene); atom transfer radical polymerization; macroinitiator; chemical oxidative polymerization
• Language: croatian
• URN:NBN: urn:nbn:hr:149:216631
• Project: Number: UIP-2019-04-8304; Title: Molekularno krojenje istezljivih i zacijeljivih vodljivih polimera za nosivu elektroniku; Title: Molecular Tailoring of Stretchable and Healable Conductive Polymers for Wearable Electronics; Acronym: SHaPes; Leader: Zvonimir Katančić; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: UIP
• Study programme: Title: Chemical Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2023-05-09 10:43:20