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Swelling Behavior of Chemically Ion‐Doped Hydrogels
Author(s) -
Alveroglu Esra,
Gelir Ali,
Yilmaz Yasar
Publication year - 2009
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200950723
Subject(s) - pyranine , swelling , monomer , acrylamide , chemistry , kinetics , self healing hydrogels , polymer chemistry , polyacrylamide , nuclear chemistry , polymer , materials science , organic chemistry , biochemistry , composite material , physics , quantum mechanics , membrane
Summary: Poly(acrylamide‐ co ‐ N,N ′‐methylenebisacrylamide) gels were synthesized in the presence of pyranine fluoroprobe (trisodium 8‐hydroxypyrene‐1,3,6‐trisulfonate). Pyranine binds to polymer chains through its OH group via radical addition. Thus, the final gels were doped with the pyranines having SO 3 −ions as side groups and Na + as counter‐ions. The swelling behavior of gels prepared with varying amounts of pyranine and monomer concentrations were studied. The swelling ratio of the synthesized gels did not exceed 35 except the 2 M gel containing 10 −2 M pyranine which are the concentrations for the abnormal swelling behavior. At this particular concentration of monomer (acrylamide) and pyranine, the mass ratio m/m 0 , the mass of the swollen gel to the mass of the dried gel, reaches about 1300; a stepwise behavior was observed in the swelling kinetics. The swelling kinetics of polyacrylamide gels containing unbound (free) pyranine were compared with the swelling behavior of the gels containing chemically bound pyranine.