Abstract
Zwitterionic polymers constitute a unique class of polyelectrolytes which have not been studied systematically because of the difficulty in their controlled synthesis and precise physicochemical characterization. The salt-concentration dependence of the chain dimensions and swollen brush structures of polyzwitterions, namely poly(2- methacryloyloxyethylphosphorylcholine) (PMPC) and poly[3-(N-2- methacryloyloxyethyl-N,N-dimethyl)ammonatopropanesulfonate] (PMAPS), in aqueous solutions of various ionic strengths was characterized by static light scattering, dynamic light scattering, atomic force microscopy (AFM), neutron reflectivity (NR), contact angle measurements, and macroscopic friction tests by sliding a glass ball under a load of 0.49 N. The hydrodynamic radius R H of PMPC was independent of NaCl concentration, whereas the R H of PMAPS markedly increased with the ionic strength. AFM and NR measurements also showed the independence of NaCl concentration of the swollen thickness of the PMPC brush in aqueous solution and significant changes in the swollen thickness of the PMAPS brush in aqueous NaCl solution. Both PMPC and PMAPS brushes showed oil detachment behavior in water and aqueous NaCl solutions. The PMPC brush had a significantly low friction coefficient (0.02-005) at a sliding velocity of 10-2 to 10-1 m s -1 in water even under a high normal pressure of 139 MPa.
| Original language | English |
|---|---|
| Pages (from-to) | 5138-5148 |
| Number of pages | 11 |
| Journal | Soft Matter |
| Volume | 9 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - Jun 11 2013 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Condensed Matter Physics
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Chain dimensions and surface characterization of superhydrophilic polymer brushes with zwitterion side groups. / Kobayashi, Motoyasu; Terayama, Yuki; Kikuchi, Moriya; Takahara, Atsushi.
In: Soft Matter, Vol. 9, No. 21, 11.06.2013, p. 5138-5148.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Chain dimensions and surface characterization of superhydrophilic polymer brushes with zwitterion side groups
AU - Kobayashi, Motoyasu
AU - Terayama, Yuki
AU - Kikuchi, Moriya
AU - Takahara, Atsushi
PY - 2013/6/11
Y1 - 2013/6/11
N2 - Zwitterionic polymers constitute a unique class of polyelectrolytes which have not been studied systematically because of the difficulty in their controlled synthesis and precise physicochemical characterization. The salt-concentration dependence of the chain dimensions and swollen brush structures of polyzwitterions, namely poly(2- methacryloyloxyethylphosphorylcholine) (PMPC) and poly[3-(N-2- methacryloyloxyethyl-N,N-dimethyl)ammonatopropanesulfonate] (PMAPS), in aqueous solutions of various ionic strengths was characterized by static light scattering, dynamic light scattering, atomic force microscopy (AFM), neutron reflectivity (NR), contact angle measurements, and macroscopic friction tests by sliding a glass ball under a load of 0.49 N. The hydrodynamic radius R H of PMPC was independent of NaCl concentration, whereas the R H of PMAPS markedly increased with the ionic strength. AFM and NR measurements also showed the independence of NaCl concentration of the swollen thickness of the PMPC brush in aqueous solution and significant changes in the swollen thickness of the PMAPS brush in aqueous NaCl solution. Both PMPC and PMAPS brushes showed oil detachment behavior in water and aqueous NaCl solutions. The PMPC brush had a significantly low friction coefficient (0.02-005) at a sliding velocity of 10-2 to 10-1 m s -1 in water even under a high normal pressure of 139 MPa.
AB - Zwitterionic polymers constitute a unique class of polyelectrolytes which have not been studied systematically because of the difficulty in their controlled synthesis and precise physicochemical characterization. The salt-concentration dependence of the chain dimensions and swollen brush structures of polyzwitterions, namely poly(2- methacryloyloxyethylphosphorylcholine) (PMPC) and poly[3-(N-2- methacryloyloxyethyl-N,N-dimethyl)ammonatopropanesulfonate] (PMAPS), in aqueous solutions of various ionic strengths was characterized by static light scattering, dynamic light scattering, atomic force microscopy (AFM), neutron reflectivity (NR), contact angle measurements, and macroscopic friction tests by sliding a glass ball under a load of 0.49 N. The hydrodynamic radius R H of PMPC was independent of NaCl concentration, whereas the R H of PMAPS markedly increased with the ionic strength. AFM and NR measurements also showed the independence of NaCl concentration of the swollen thickness of the PMPC brush in aqueous solution and significant changes in the swollen thickness of the PMAPS brush in aqueous NaCl solution. Both PMPC and PMAPS brushes showed oil detachment behavior in water and aqueous NaCl solutions. The PMPC brush had a significantly low friction coefficient (0.02-005) at a sliding velocity of 10-2 to 10-1 m s -1 in water even under a high normal pressure of 139 MPa.
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U2 - 10.1039/c3sm27700c
DO - 10.1039/c3sm27700c
M3 - Article
AN - SCOPUS:84877791157
VL - 9
SP - 5138
EP - 5148
JO - Soft Matter
JF - Soft Matter
SN - 1744-683X
IS - 21
ER -