Synthesis and swelling behavior of a weak polyacid brush
- 8 September 2002
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 117 (10), 4988-4994
- https://doi.org/10.1063/1.1490924
Abstract
We describe the synthesis and the swelling behavior of a weak polyacid brush attached to a solid surface.Monolayers of poly methacrylic acid are generated by using self-assembledmonolayers of an azo initiator and radical chain polymerization of methacrylic acidmonomer at the surface of a planar substrate in situ. The thickness of the resulting surface-attached polyelectrolyte brush can be adjusted between 5 and 400 nm in the dry, collapsed state. The swelling behavior in water as a function of pH and salt concentration is investigated by multiple-angle null-ellipsometry. At high salt concentrations the brush thickness decreases due to electrostatic screening. At low concentration, however, an increase of thickness with ion concentration is found.This publication has 24 references indexed in Scilit:
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