Open AccessSimilarities between polyelectrolyte gels and biopolymer solutions
Author(s) -
Horkay Ferenc,
Hecht AnneMarie,
Geissler Erik
Publication year - 2006
Publication title -
journal of polymer science part b: polymer physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.65
H-Index - 145
eISSN - 1099-0488
pISSN - 0887-6266
DOI - 10.1002/polb.21008
Subject(s) - polyelectrolyte , biopolymer , polymer , persistence length , sodium polyacrylate , polymer chemistry , neutron scattering , swelling , chemistry , chemical engineering , osmotic pressure , monomer , materials science , scattering , organic chemistry , optics , raw material , biochemistry , physics , engineering
Small angle neutron scattering (SANS) measurements and osmotic swelling pressure measurements are reported for polyelectrolyte gels and solutions under nearly physiological conditions. A synthetic polymer (sodium‐polyacrylate) and three biopolymers (DNA, hyaluronic acid, and polyaspartic acid) are studied. The neutron scattering response of these anionic polyelectrolytes is closely similar, indicating that at larger length scales the organization of the polymer molecules is not significantly affected by the fine details of the molecular architecture ( e.g. , size and chemical structure of the monomer unit, type of polymer backbone). The results suggest that specific interactions between the polyelectrolyte chains and the surrounding monovalent cations are negligible. It is found that the osmotic compression modulus of these biopolymer solutions determined from the analysis of the SANS response decreases with increasing chain persistence length. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 3679–3686, 2006