Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Highly-ordered hybrid organic-inorganic isoporous membranes from polymer modified nanoparticles
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0002-8348-2273
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0003-3201-5138
Show others and affiliations
2005 (English)In: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 26, no 7, 524-528 p.Article in journal (Refereed) Published
Abstract [en]

Organic-inorganic hybrid materials consisting of nanosized silica particles with surface grafted PS or PS-b-PMMA were synthesized using ATRP. These hybrid materials were used in the fabrication of highly-ordered isoporous membranes. Optical characterization revealed that the membranes consisted of hexagonally ordered pores of uniform size. The combination of an open pore structure and high surface area makes isoporous membranes into materials of high interest in fields as biotechnology and photonics.

Place, publisher, year, edition, pages
2005. Vol. 26, no 7, 524-528 p.
Keyword [en]
atomic force microscopy (AFM), atom transfer radical polymerization (ATRP), block copolymers, self-assembly, silica nanoparticles
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-8372DOI: 10.1002/marc.200400617ISI: 000228436600004Scopus ID: 2-s2.0-20444470076OAI: oai:DiVA.org:kth-8372DiVA: diva2:13676
Note
QC 20100901Available from: 2008-05-08 Created: 2008-05-08 Last updated: 2010-09-01Bibliographically approved
In thesis
1. From Responsive Interfaces to Honeycomb Membranes by Controlled Radical Polymerisation
Open this publication in new window or tab >>From Responsive Interfaces to Honeycomb Membranes by Controlled Radical Polymerisation
2008 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

In this study, surface modification of both organic and inorganic substrates (in terms of cellulose and silica nanoparticles, respectively) has been explored using surface-initiated atom transfer radical polymerisation (ATRP).

The desire to modify bio-based materials to fit into new application areas and the need for bio-based materials with improved material properties is steadily increasing due to environmental concern.

Superhydrophobic and self-cleaning cellulose surfaces were fabricated by combining ATRP with post-functionalisation. Glycidyl methacrylate was grafted from filter paper, and the epoxide groups were used as reactive handles to create a branched “graft-on-graft” architecture. Post-functionalisation of this architecture with perfluorinated chains or alkyl chains resulted in the formation of superhydrophobic surfaces.

Grafting of N-isopropylacrylamide (NIPAAm) from filter paper yielded cellulose surfaces capable of switching the wettability, from hydrophilic to hydrophobic, in response to changes in temperature. The wettability of cellulose surfaces grafted with poly(4-vinylpyridine) (P4VP) could be adjusted from hydrophilic to hydrophobic by changing pH. Furthermore, cellulose surfaces responding to changes in both pH and temperature were obtained via grafting of block copolymers of PNIPAAm and P4VP.

The use of inorganic nano-particles in composites has attracted considerable academic and industrial interest due to their excellent mechanical and thermal properties. Styrene was grafted from the surface of silica nanoparticles using ATRP. The resulting organic-inorganic hybrid materials did not aggregate to the same extent as the un-modified silica particles.

The polystyrene-modified silica particles were used for the fabrication of honeycomb membranes. It was evident that the pore sizes and the number of porous layers could be tuned by varying the conditions used for film casting. To broaden the range of polymers available for film casting into honeycomb membranes, a block copolymer of polystyrene and poly(methyl methacrylate) was grafted from silica nanoparticles. Polymer-blends of polystyrene-modified particles and poly(9,9´-dihexylfluorene) (PDHF) were also used as an alternative to incorporate functionality into honeycomb membranes.

Place, publisher, year, edition, pages
Stockholm: KTH, 2008. 67 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2008:37
Keyword
Isoporous membranes, Silica nanoparticles, ATRP, Functional surfaces, cellulose
National Category
Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-4733 (URN)978-91-7178-982-2 (ISBN)
Public defence
2008-05-29, F3, Lindstedtväg 26, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20100901Available from: 2008-05-08 Created: 2008-05-08 Last updated: 2010-09-01Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Authority records BETA

Malmström, Eva E.Johansson, Mats K. G.Hult, Anders

Search in DiVA

By author/editor
Nyström, DanielAntoni, PerMalmström, Eva E.Johansson, Mats K. G.Hult, Anders
By organisation
Fibre and Polymer Technology
In the same journal
Macromolecular rapid communications
Polymer Chemistry

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 71 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf