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Synthesis and swelling behavior of a weak polyacid brush

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons47645

Biesalski,  M.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48112

Johannsmann,  Diethelm
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48674

Rühe,  Jürgen
MPI for Polymer Research, Max Planck Society;

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Zitation

Biesalski, M., Johannsmann, D., & Rühe, J. (2002). Synthesis and swelling behavior of a weak polyacid brush. Journal of Chemical Physics, 117(10), 4988-4994.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-64F6-D
Zusammenfassung
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-assembled monolayers of an azo initiator and radical chain polymerization of methacrylic acid monomer 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. (C) 2002 American Institute of Physics.