Sinteza graft kopolimera PEDOT-g-PCL polimerizacijom otvaranja prstena

master's thesis

• Title (english): Synthesis of graft copolymer PEDOT-g-PCL by ring opening polymerization
• Author: Marija Švegovec
• 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: 2021-09-13, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Elektrovodljivi polimeri su zbog svoje električne provodnosti, velike površine i stabilnosti u okolišu idealan materijal za primjenu u biosenzorima za praćenje osobnog zdravlja ugrađenima u nosivu elektroniku, a za tu svrhu nužno je da budu istezljivi i samozacjeljivi. To se postiže ugradnjom dinamičkih nekovalentnih umreženja između polimernih lanaca elekrovodljivog polimera što je ključno za zadržavanje dobre sposobnosti prijenosa naboja.
U ovom diplomskom koristit će se novi višefazni dizajn za visoko istezljive, elektrovodljive polimere koji su zacjeljivi na sobnoj temperaturi. Glavni lanac biti će
poli(3,4-etilendioksitiofen), a na njega će se vezati bočne grane PCl polimera. Kao alat za krojenje željenih graft polimera, koristit će se anionska polimerizacija otvaranja prstena koja omogućava izgradnju polimera sa specifično krojenim funkcionalnostima, u ovom slučaju optimalne gustoće umreženja i duljine bočnih lanaca. Za dobivanje različitih duljina PCL lanca korišteni su različiti uvjeti polimerizacije, a učinak na svojstva procijenjen je uz pomoć više tehnika. Strukturna svojstva sintetiziranih materijala okarakterizirana su tehnikama kao što su nuklearna magnetska rezonancija (NMR), infracrvena spektroskopija (FTIR) i UV/Vis spektroskopija. Elektrokemijska svojstva proučavana su cikličkom voltametrijom i metodom sonde s četiri točke, dok su toplinska svojstva proučavana termogravimetrijskom analizom (TGA) i diferencijalnom skenirajućom kalorimetrijom (DSC). Analize su potvrdile uspješnu sintezu vodljivih graft polimera s povećanom rastezljivošću uz zadržavanje dobrih vodljivih svojstava.

Abstract (english)

Conductive polymers are an ideal material for application in health monitoring biosensors in wearable electronics because of their electrical conductivity, large surface area, and environmental stability, and for that purpose it is necessary for them to be stretchable and self-healable. This can be achieved by introducing side chains containing hydrogen bonding species which enable non-covalent cross-linking between conducting polymers, while maintaining the high conductivity of the backbone. In this work, a novel multiphase design for highly stretchable, room temperature healable and conductive polymers is used. The backbone consists of poly(3,4-ethylenedioxythiophene) (PEDOT) onto which polycaprolactone (PCL) side chains are grafted. Anionic ring-opening polymerization is used as a tool for tailoring the desired graft polymers, which allows the assembly of polymers with specific tailored functionalities, in this case with optimal density and side-chain length. Different polymerization conditions were used to obtain different PCL chain lengths and effect on properties was evaluated by multiple techniques. The structural properties of the synthesized materials were characterized using techniques such as nuclear magnetic resonance (NMR), infrared spectroscopy (FTIR) and UV/Vis. The electrochemical properties were studied by cyclic voltammetry and four-point probe method, while the thermal properties were studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The analyses confirmed the successful synthesis of conductive graft polymers with increased stretchability while maintaining good conductive properties.

• Keywords: elektrovodljivi polimeri; graft kopolimer; poli(3 4-etilendioksitiofen); poli(kaprolakton); senzori
• Keywords (english): conductive polymers; graft copolymer; poly(3 4-ethylenedioxythiophene); poly(caprolactone); sensors
• Language: croatian
• URN:NBN: urn:nbn:hr:149:549692
• 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: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Advanced materials and technologies; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2023-04-11 10:47:41