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PRIPRAVA ELEKTRIČNO PREVODNIH GRAFENSKIH KOMPOZITOV
Ošlaj, Nika (Author), Genorio, Boštjan (Mentor) More about this mentor... This link opens in a new window

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Abstract
V diplomskem delu je predstavljen koncept priprave električno prevodnih grafenskih kompozitov. Takšne kompozite želimo pripraviti za aplikacije v elektrokemiji, na primer kot pretočne elektrode. Grafen je enodimenzionalna plast ogljikovih atomov, razporejenih v 6-kotnike. Je električno prevoden material, medtem ko večina polimerov ni. Polimeri, pripravljeni po polyHIPE postopku, so zelo porozni in se lahko uporabljajo v številnih analiznih tehnikah, na primer pri kromatografiji. Pri pripravi polimera lahko v zmes vmešamo električno prevodne ogljikove materiale in tako dobimo prevodno emulzijo. Če je pripravljena emulzija dobro dispergirana (ni posedanja delcev ali ločitve faz), jo lahko polimeriziramo, in sicer po postopku radikalske polimerizacije na atomu prenosa, z aktivatorji, regeneriranimi s prenosom elektronov (ATRP/ARGET), ki je zelo enostaven, saj dobljeni emulziji dodamo le surfaktant, ki je površinsko aktivna snov, in pomešamo. Takim kompozitom lahko izmerimo električno prevodnost in z vrstičnim elektronskim mikroskopom (SEM) določimo morfologijo in porazdelitev delcev ter kemijsko sestavo vzorca. V sklopu eksperimentalnega dela sem v polimerno matrico dodajala različne deleže različnih ogljikovih materialov (prevodni amorfen ogljik - CCB, večstenske ogljikove nano cevke - MWCNT in reduciran grafen oksid – rGO) ter ugotavljala homogenost porazdelitve ogljikovih materialov po polimerni matrici.

Language:Slovenian
Keywords:kompoziti, grafen, električna prevodnost, polimeri
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Technology
Year:2020
COBISS.SI-ID:28433155 This link opens in a new window
Views:151
Downloads:99
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Secondary language

Language:English
Title:PREPARATION OF ELECTRICALLY CONDUCTIVE GRAPHENE COMPOSITES
Abstract:
This thesis presents the concept of preparation of electrically conductive graphene composites. We want to prepare such composites for applications in electrochemistry, for example as flow electrodes. Graphene is a one-dimensional layer of carbon atoms arranged in hexagons. It is an electrically conductive material, while most polymers are not. Polymers prepared by the polyHIPE process are highly porous and can be used in many analytical techniques, such as chromatography. In the preparation of the polymer, electrically conductive carbon materials can be mixed into the mixture to obtain a conductive emulsion. If the prepared emulsion is well dispersed (no particle settling or phase separation), it can be polymerized by the radical polymerization process on the transfer atom, with activators regenerated by electron transfer (ATRP/ARGET), which is very easy because the resulting emulsion only the surfactant, is added and mixed. With such composites, electrical conductivity can be measured and the morphology and particle distribution as well as the chemical composition of the sample can be determined using a scanning electron microscope (SEM). As part of the experimental work, I added different proportions of different carbon materials to the polymer matrix (conductive amorphous carbon – CCB, multiwall carbon nano tubes – MWCNT and reduced graphene oxide – rGO) and the homogeneity of the distribution of carbon materials across the polymer matrix.

Keywords:composites, graphene, electrical conductivity, polymers

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