A1 Refereed original research article in a scientific journal
A novel method to prepare water dispersible poly(benzimidazobenzophenanthroline) (BBL) by partial substitution of chain ends with poly(ethylene oxide)
Authors: Hirvonen SP, Manttari M, Wigren V, Salomaki M, Kvarnstrom C, Tenhu H
Publisher: SPRINGER
Publication year: 2011
Journal: Colloid and Polymer Science
Journal name in source: COLLOID AND POLYMER SCIENCE
Journal acronym: COLLOID POLYM SCI
Number in series: 9
Volume: 289
Issue: 9
First page : 1065
Last page: 1072
Number of pages: 8
ISSN: 0303-402X
DOI: https://doi.org/10.1007/s00396-011-2413-0(external)
Abstract
Poly(benzimidazobenzophenanthroline) (BBL) was prepared according to literature method and modified with poly(ethylene oxide) in a one pot synthesis. After precipitation in aqueous sodium carbonate solution and subsequent purification, aqueous dispersions were prepared by ultrasonication. Particle sizes in the dispersions ranged from few tens of nanometers to several micrometers and most of the particles had sizes of 50-250 nm. Further studies indicated that the colloidal stability is a combined result of steric stabilization caused by excluded volume interactions of PEO chains on particle surface and electrostatic stabilization by the dissociated carboxylic acid groups on the particle surface. The product could be processed into uniform films 20-30 nm in thickness by spin coating onto gold-plated silicon substrates having aminethiol monolayer as the top most layer.
Poly(benzimidazobenzophenanthroline) (BBL) was prepared according to literature method and modified with poly(ethylene oxide) in a one pot synthesis. After precipitation in aqueous sodium carbonate solution and subsequent purification, aqueous dispersions were prepared by ultrasonication. Particle sizes in the dispersions ranged from few tens of nanometers to several micrometers and most of the particles had sizes of 50-250 nm. Further studies indicated that the colloidal stability is a combined result of steric stabilization caused by excluded volume interactions of PEO chains on particle surface and electrostatic stabilization by the dissociated carboxylic acid groups on the particle surface. The product could be processed into uniform films 20-30 nm in thickness by spin coating onto gold-plated silicon substrates having aminethiol monolayer as the top most layer.
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