Microcellular open-porous polystyrene-based composites from emulsions

Sebastjan Huš (Author), Mitja Kolar (Author), Peter Krajnc (Author)

Abstract

Series of cross-linked polystyrene samples were prepared using an emulsion templating approach, where monomers were contained in the continuous phase of the emulsion, while the droplet aqueous phase induced primary pores, connected with a number of secondary pores. Emulsions with a high fraction of the droplet phase (HIPEs) were used and stabilised with a combination of a surfactant (sorbitan monooleate) and various types of particles (charcoal powder, copper powder and carbon nanopowder). The morphology of the resulting porous polymer depends on the type and amount of the particles added to the emulsion; however, in all the cases open-cellular morphology was formed. The size of the primary pores (cavities) ranged from 5 µm to 25 µm, while the size of the secondary interconnecting pores was from 1 µm to 5 µm. The materials were investigated using scanning electron microscopy and nitrogen adsorption/desorption.

Keywords

polyHIPE;porous polymers;nanocomposites;porosity;polystyrene;

Data

Language:	English
Year of publishing:	2014
Typology:	1.01 - Original Scientific Article
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	Inštitut za kovinske materiale in tehnologije Ljubljana
UDC:	544.022.537:678.746.2
COBISS:	17826326
ISSN:	1580-2949
Parent publication:	Materiali in tehnologije
Views:	1231
Downloads:	111
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary title:	Mikrocelični odprtoporozni polistirenski kompoziti iz emulzij
Secondary abstract:	Z uporabo emulzij z visokim deležem notranje faze smo pripravili serijo zamreženih polistirenskih vzorcev. Monomeri so bili vsebovani v kontinuirni fazi emulzije, kapljice notranje vodne faze pa so povzročile poroznost materiala z vrsto primarnih por, povezanih s povezovalnimi porami. Emulzije z visokim deležem notranje faze (HIPE) smo stabilizirali z uporabo surfaktanta v kombinaciji z različnimi delci (oglje v prahu, baker v prahu in ogljikov nanoprah). Na morfologijo pripravljenih odprtoporoznih materialov sta vplivala tako vrsta kot tudi količina dodanih delcev. Velikost primarnih por je bila v območju med 5 µm in 25 µm, medtem ko je bila velikost sekundarnih povezovalnih por v območju med 1 µm in 5 µm. Materiale smo karakterizirali z uporabo vrstičnega elektronskega mikroskopa in adsorpcijo/desorpcijo dušika.
Secondary keywords:	porozni polimeri;poliHIPE;nanokompoziti;poroznost;polistiren;emulzije;
URN:	URN:NBN:SI
Type (COBISS):	Scientific work
Pages:	str. 403-407
Volume:	ǂLetn. ǂ48
Issue:	ǂšt. ǂ3
Chronology:	maj-jun. 2014
ID:	9591583