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Structure of Water Incorporated in Sulfobetaine Polymer Films as Studied by ATR‐FTIR
Author(s) -
Kitano Hiromi,
Mori Takayuki,
Takeuchi Yuki,
Tada Susumu,
GemmeiIde Makoto,
Yokoyama Yoshiyuki,
Tanaka Masaru
Publication year - 2005
Publication title -
macromolecular bioscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.924
H-Index - 105
eISSN - 1616-5195
pISSN - 1616-5187
DOI - 10.1002/mabi.200400212
Subject(s) - methacrylate , attenuated total reflection , polymer , polymer chemistry , copolymer , methyl methacrylate , materials science , hydrogen bond , infrared spectroscopy , fourier transform infrared spectroscopy , thin film , (hydroxyethyl)methacrylate , molecule , chemical engineering , chemistry , organic chemistry , composite material , nanotechnology , engineering
Summary: The structure and hydrogen bonding of water in the vicinity of a thin film of a sulfobetaine copolymer (poly[( N , N ‐dimethyl‐ N ‐(3‐sulfopropyl)‐3′‐methacrylamidopropanaminium inner salt)‐ ran ‐(butyl methacrylate)], poly(SPB‐ r ‐BMA)), were analyzed with band shapes of OH stretching of attenuated total reflection infrared (ATR‐IR) spectra. The copolymer could be cast as a thin film, of approximate thickness 10 μm, on a ZnSe crystal for the ATR‐IR spectroscopy. At an early stage of sorption of water into the polymer film, the OH stretching band of the IR spectra for the water incorporated in the film was similar to that for free water. This is consistent with the tendency for another zwitterionic polymeric material, poly[(2‐methacryloyloxyethylphosphorylcholine)‐ ran ‐(butyl methacrylate)] (poly(MPC‐ r ‐BMA). It is, however, contradictory to the drastic change in the OH stretching band for water incorporated into films of polymers such as poly(2‐hydroxyethyl methacrylate), poly(methyl methacrylate) and poly(butyl methacrylate). These results suggest that polymers with a zwitterionic structure do not significantly disturb the hydrogen bonding between water molecules incorporated in the thin films. The investigation into the blood‐compatibility of both the poly(SPB‐ r ‐BMA) and the poly(MPC‐ r ‐BMA) films indicate a definite correlation between the blood‐compatibility of the polymers and the lack of effect of the polymeric materials on the structure of the incorporated water.Number of platelets adhered to various polymer films. a: Hydrophilic glass, b: PBMA, c: Poly(DMAPMA‐ r ‐BMA), d: Poly(SPB‐ r ‐BMA)‐q (DQ = 88.4%), e: PHEMA, f: Poly(SPB‐ r ‐BMA) (DQ = 100%).