Vpliv topil na morfološko strukturo poroznih zamreženih polistirenskih membran

diplomska naloga

Silvo Seifried (Author), Peter Krajnc (Mentor), Črtomir Stropnik (Co-mentor)

Abstract

Namen diplomske naloge je bil raziskati vpliv različnih topil (porogenih) na morfološko strukturo poroznih zamreženih polistirenskih membran. Iz organske in vodne faze smo pripravili vodno-oljne (v/o) emulzije z visokim deležem notranje faze (HIPE). Nastale emulzije smo nanesli na stekleno ploščo v tanki plasti in jih polimerizirali s povišano temperaturo. Po čiščenju smo dobili porozne zamrežene poliHIPE membrane. Membrane smo pripravili na osnovi stirena, zamreženega z divinilbenzenom (DVB). Spreminjali smo delež vodne faze (75 % in 85 %) in delež DVB (2 % in 4 %). Da bi raziskali vpliv topil na strukturo membran, smo membrane modificirali z dodatkom plastifikatorja (2-etilheksil akrilat) in dveh porogenih topil (toluen in klorobenzen). Vse dobljene membrane smo okarakterizirali z merjenjem njihove končne debeline, s pretočnostjo za deionozirano vodo in z določitvijo stopnje nabrekanja v štirih različnih topilih (v vodi, acetonitrilu, toluenu in kloroformu). V izdelavo membran smo vključili tudi 4-nitrofenil akrilat kot reaktivno komponento v organski fazi, zaradi možnosti nadaljnje funkcionalizacije membran in uporabe pri sinteznih tehnikah.

Keywords

stiren;divinilbenzen;polimeri;emulzije z visokim deležem notranje faze (HIPE);membrane;

Data

Language:	Slovenian
Year of publishing:	2009
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[S. Seifried]
UDC:	544.725.2:66.061.18(043.2)
COBISS:	13318166
Views:	2991
Downloads:	173
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Influence of solvents on morphological structure of porous crosslinked polystyrene membranes
Secondary abstract:	Purpose of this diploma work was to investigate how diferent solvents influenced the morphological structure of porous crosslinked polystyrene membranes. Water in oil (w/o) high internal phase emulsions were prepared from organic and water phase. Membranes were prepared by casting a thin layer of emulsion on a glass plate and polymerised at elevated temperature. After purification porous poliHIPE membranes were obtained. The ratio of water phase (75 % and 85 %) and ratio of divinylbenzene (2 % and 4 %) were altered. Divinylbenzene (DVB) was used as a crosslinker and styrene was used as a basic component of oil (organic) phase. In order to study the effects of solvents on the stucture of membranes we modified the membranes by adding two porogens (toluene and chlorobenzene) and the plasticizer (2-ethylhexyl acrylate). All yielding membranes were characterized by measuring theirs cast thickness, flux of deionised water and swelling degree in four solvents (deionised water, acetonitrile, toluene and chloroform). Further, we used 4-nitrophenylacrylate as a reactive component in organic phase to prepare membranes for further functionalisation.
Secondary keywords:	styrene;divinylbenzene;polymers;high internal phase emulsions (HIPEs);polyHIPE materials;membranes;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	VIII, 50, [27] f.
Keywords (UDC):	mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;physical chemistry;fizikalna kemija;chemistry of surface phenomena and colloids;kemija površinskih pojavov in koloidov;applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;chemical technology;chemical and related industries;kemijska tehnologija;kemijske in sorodne industrije;chemical technology of liquids;processes and equipment for treatment of or with liquids;kemijska tehnologija tekočin;procesi in oprema za obdelovanje tekočin ali za obdelovanje z njimi;
ID:	985910