Block copolymers based on poly(vinylidene fluoride)

Vincent Voet

Block copolymers based on poly(vinylidene fluoride)

Vertaalde titel van de bijdrage: Blokcopolymeren gebaseerd op polyvinylideenfluoride

Vincent Voet

Macromolecular Chemistry and New Polymeric Materia

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Samenvatting

In de afgelopen decennia zijn de hardware afmetingen van elektronische apparatuur voor draagbare smartphones, laptops en camera’s steeds verder afgenomen, terwijl hun prestaties enorm zijn toegenomen. Om deze trend in de toekomst voort te zetten is er een noodzaak om alternatieve materialen te ontwikkelen. In dit onderzoek wordt gebruik gemaakt van het bijzondere karakter van blokcopolymeren om nieuwe materialen te ontwikkelen voor dataopslagapparatuur die is ingebouwd in de elektronische apparatuur die wij dagelijks gebruiken.
Blokcopolymeren zijn grote moleculen opgebouwd uit twee verschillende polymeerblokken. Aangezien beide blokken niet mengbaar zijn (net zoals water en olie), zullen ze fasescheiden op de nanoschaal in domeinen met een hoge mate van ordening. De nauwkeurige zelforganisatie van blokcopolymeren – toegepast in dit onderzoek – is een handige manier om elektronische apparaten op te bouwen, omdat de moleculen spontaan geordende structuren vormen en de afmetingen en functionaliteit gemakkelijk kunnen worden aangepast.
In dit onderzoek hebben we blokcopolymeren gemaakt waarin één van de blokken ferro-elektrisch is. Ferro-elektrische materialen kunnen zich bevinden in verschillende gepolariseerde toestanden ("1" en "0") en de polarisatie kan worden omgeschakeld met een elektrisch veld, waardoor het mogelijk is om data op te slaan. We hebben onze blokcopolymeren gebruikt om geordende ferro-elektrische nanoschuimen te produceren. Daarna hebben we het polymeerschuim opgevuld met magnetische verbindingen, wat leidde tot een multiferroïsch materiaal samengesteld uit ferro-elektrische en ferromagnetische domeinen. Mogelijke koppeling tussen de elektrische en magnetische eigenschappen geeft de mogelijkheid om data elektrisch te schrijven en magnetisch uit te lezen.

Vertaalde titel van de bijdrage	Blokcopolymeren gebaseerd op polyvinylideenfluoride
Originele taal-2	English
Kwalificatie	Doctor of Philosophy
Toekennende instantie	Rijksuniversiteit Groningen
Begeleider(s)/adviseur	Loos, Katja, Supervisor ten Brinke, Gerrit, Supervisor
Datum van toekenning	30-jan.-2015
Plaats van publicatie	[S.l.]
Uitgever	[S.n.]
Gedrukte ISBN's	978-90-367-7474-1
Elektronische ISBN's	978-90-367-7473-4
Status	Published - 2015

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Title and contents Final publisher's version, 324 KB
Chapter 1Final publisher's version, 4,98 MB
Chapter 2Final publisher's version, 7,94 MB
Chapter 3Final publisher's version, 5,74 MB
Chapter 4Final publisher's version, 8,54 MB
Chapter 5Final publisher's version, 11,7 MB
Chapter 6Final publisher's version, 8,74 MB
AbstractFinal publisher's version, 414 KB
SamenvattingFinal publisher's version, 739 KB
AcknowledgementsFinal publisher's version, 112 KB
List of publicationsFinal publisher's version, 157 KB
Complete dissertationFinal publisher's version, 48,5 MB
PropositionsFinal publisher's version, 97,2 KB

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abstract = "In recent decades, the hardware dimensions of electronic and storage devices for portable smart phones, laptops and cameras have scaled downwards, while their performance tremendously increased. To continue this trend in the near future, alternative materials need to be developed. This research utilizes the intriguing nature of block copolymers to develop novel materials for data storage applications that are built into our everyday microelectronic devices.Block copolymers are large molecules composed of two different polymer blocks. Since both blocks are not compatible with each other (like water and oil), they phase separate on the nanoscale into domains of highly regular dots, lines or sheets, depending on the molecular architecture. The precise self-assembly of block copolymers - used in this research - is a convenient way to build electronic devices, since the molecules arrange spontaneously into ordered structures and the dimensions and functionality can be tailored easily.In this research, we prepared block copolymers that include ferroelectric blocks. The ability of ferroelectric materials to exist in different polarized states (“1” and “0”) and to switch the polarization in an electric field enables their application in storage devices. Our block copolymers were used to produce well-ordered ferroelectric nanofoams. Furthermore, we backfilled the polymer nanofoam with magnetic compounds to generate multiferroic materials composed of both ferroelectric and ferromagnetic domains. Potential coupling between the electric and magnetic properties will permit data to be written electrically and read magnetically.",

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