Chain dimension of polyampholytes in solution and immobilized brush states

Moriya Kikuchi; Yuki Terayama; Tatsuya Ishikawa; Taiki Hoshino; Motoyasu Kobayashi; Hiroki Ogawa; Hiroyasu Masunaga; Jun Ichiro Koike; Misao Horigome; Kazuhiko Ishihara; Atsushi Takahara

doi:10.1038/pj.2011.116

Chain dimension of polyampholytes in solution and immobilized brush states

Moriya Kikuchi, Yuki Terayama, Tatsuya Ishikawa, Taiki Hoshino, Motoyasu Kobayashi, Hiroki Ogawa, Hiroyasu Masunaga, Jun Ichiro Koike, Misao Horigome, Kazuhiko Ishihara, Atsushi Takahara

Department of Applied Molecular Chemistry

Research output: Contribution to journal › Article

40 Citations (Scopus)

Abstract

The dimensions and intermolecular interactions of surface-grafted and unbound, free polyampholytes, poly3-(N-2-methacryloyloxyethyl-N,N-dimethyl) ammonatopropanesulfonate (PMAPS) and poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC), were estimated in an aqueous NaCl solution over a wide range of salt concentrations (C _s). The free PMAPS and PMPC fractionated by a recycling preparative size-exclusion chromatography system were characterized in aqueous NaCl solutions for C _s over a range from 0 to 5.0 M by static light scattering and dynamic light scattering (DLS) measurements. The hydrodynamic radius (R _H) and the concentration coefficient of the diffusion coefficient (k _D) for PMPC were independent of C _s, whereas those for PMAPS were strongly dependent on C _s. Monodisperse silica nanoparticles immobilized with PMAPS (SiNP-PMAPS) and PMPC (SiNP-PMPC) by surface-initiated atom transfer radical polymerization were characterized in aqueous NaCl solutions for C _s over a range from 0 to 5.0 M by DLS and synchrotron radiation small-angle X-ray scattering (SAXS) measurements. The SAXS profiles from SiNP-PMAPS and SiNP-PMPC solutions were well described by the core-shell model, taking into account interacting self-avoiding chains and assuming a Schulz-distributed core with two fitting parameters.

Original language	English
Pages (from-to)	121-130
Number of pages	10
Journal	Polymer Journal
Volume	44
Issue number	1
DOIs	https://doi.org/10.1038/pj.2011.116
Publication status	Published - Jan 1 2012

All Science Journal Classification (ASJC) codes

Polymers and Plastics
Materials Chemistry

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10.1038/pj.2011.116

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Kikuchi, M., Terayama, Y., Ishikawa, T., Hoshino, T., Kobayashi, M., Ogawa, H., Masunaga, H., Koike, J. I., Horigome, M., Ishihara, K., & Takahara, A. (2012). Chain dimension of polyampholytes in solution and immobilized brush states. Polymer Journal, 44(1), 121-130. https://doi.org/10.1038/pj.2011.116

Chain dimension of polyampholytes in solution and immobilized brush states. / Kikuchi, Moriya; Terayama, Yuki; Ishikawa, Tatsuya; Hoshino, Taiki; Kobayashi, Motoyasu; Ogawa, Hiroki; Masunaga, Hiroyasu; Koike, Jun Ichiro; Horigome, Misao; Ishihara, Kazuhiko; Takahara, Atsushi.

In: Polymer Journal, Vol. 44, No. 1, 01.01.2012, p. 121-130.

Research output: Contribution to journal › Article

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abstract = "The dimensions and intermolecular interactions of surface-grafted and unbound, free polyampholytes, poly3-(N-2-methacryloyloxyethyl-N,N-dimethyl) ammonatopropanesulfonate (PMAPS) and poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC), were estimated in an aqueous NaCl solution over a wide range of salt concentrations (C s). The free PMAPS and PMPC fractionated by a recycling preparative size-exclusion chromatography system were characterized in aqueous NaCl solutions for C s over a range from 0 to 5.0 M by static light scattering and dynamic light scattering (DLS) measurements. The hydrodynamic radius (R H) and the concentration coefficient of the diffusion coefficient (k D) for PMPC were independent of C s, whereas those for PMAPS were strongly dependent on C s. Monodisperse silica nanoparticles immobilized with PMAPS (SiNP-PMAPS) and PMPC (SiNP-PMPC) by surface-initiated atom transfer radical polymerization were characterized in aqueous NaCl solutions for C s over a range from 0 to 5.0 M by DLS and synchrotron radiation small-angle X-ray scattering (SAXS) measurements. The SAXS profiles from SiNP-PMAPS and SiNP-PMPC solutions were well described by the core-shell model, taking into account interacting self-avoiding chains and assuming a Schulz-distributed core with two fitting parameters.",

author = "Moriya Kikuchi and Yuki Terayama and Tatsuya Ishikawa and Taiki Hoshino and Motoyasu Kobayashi and Hiroki Ogawa and Hiroyasu Masunaga and Koike, {Jun Ichiro} and Misao Horigome and Kazuhiko Ishihara and Atsushi Takahara",

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