Priprava PLA nanokompozita

master's thesis

• Title (english): Preparation of PLA nanocomposites
• Author: Andrea Špoljarić
• Mentor: Elvira Vidović (mentor)
• Committee member: Elvira Vidović (predsjednik povjerenstva)
• Committee member: Jelena Macan (član povjerenstva)
• Committee member: Domagoj Vrsaljko (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2021-07-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Nanokompozitni materijali su pripravljeni metodom zamješavanja u talini i prešanjem. Kao kompozitnu matricu korišten je polimer, poli(laktidna) kiselina (PLA), u koju je dodano komercijalno punilo silike nano dimenzija (nSiO2) i sintetizirano hibridno nanopunilo silicijevog dioksida i željezovih nanočestica (nSiO2@Fe) u različitim udjelima. Sintetizirano punilo je karakterizirano UV-VIS spektroskopijom i pretražnim elektronskim mikroskopom (SEM), a veličina punila se određivala dinamičkim raspršenjem svjetlosti (DLS). Isprešani uzorci su analizirani toplinskim metodama, termogravimetrijskom analizom (TGA) i diferencijalnom pretražnom kalorimetrijom (DSC). Osim njih, za karakterizaciju nanokompozita, korišteni su pretražni elektronski mikroskop (SEM), infracrvena spektroskopija s Fourierovom transformacijama (FTIR), mjerenje kontaktnog kuta te ispitivanja određivanja toplinske provodnosti i električne otpornosti.

Abstract (english)

Nanocomposite material was produced using melt-mixing method and was pressed into moulds. Poly (lactic) acid (PLA) was used as composite matrix, to which a commercial silica nanoparticles (nSiO2) and new synthesized hybrid nanoparticles of silica and iron nanoparticles (nSiO2@Fe) were mixed as filler with different mass ratios. Synthesized hybrid nanoparticles were analysed using UV-VIS spectroscopy and scanning electron microscope (SEM). The size of particles was determined using dynamic light scattering method (DLS). Pressed nanocomposites were analyses using thermal methods, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). In addition to them, they were also analysed using scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), contact angle measurement and measurement of thermal and electric resistivity.

• Keywords: nanokompozit; PLA; hibridno punilo
• Keywords (english): nanocomposite material; PLA; hybrid filler
• Language: croatian
• URN:NBN: urn:nbn:hr:149:110641
• 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: Access restricted to students and staff of home institution
• Created on: 2023-04-07 09:22:25