Characterization of swollen structure of high-density polyelectrolyte brushes in salt solution by neutron reflectivity

Motoyasu Kobayashi, Yuki Terayama, Masahiro Hino, Kazuhiko Ishihara, Atsushi Takahara

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Zwitterionic and cationic polyelectrolyte brushes on quartz substrate were prepared by surface-initiated atom transfer radical polymerization of 2-(methacryloyloxy)ethyl phosphorylcholine (MPC) and 2-(methacryloyloxy) ethyltrimethylammonium chloride (METAC), respectively. The effects of ionic strength on brush structure and surface properties of densely grafted polyelectrolyte brushes were analysed by neutron reflectivity (NR) measurements. NR at poly(METAC)/D2O and poly(MPC)/D2O interface revealed that the grafted polymer chains were fairly extended from the substrate surface, while the thickness reduction of poly(METAC) brush was observed in 5.6 M NaCl/D2O solution due to the screening of the repulsive interaction between polycations by hydrated salt ions. Interestingly, no structural change was observed in poly(MPC) brush even in a salt solution probably due to the unique interaction properties of phosphorylcholine units.

Original languageEnglish
Article number012010
JournalJournal of Physics: Conference Series
Volume184
DOIs
Publication statusPublished - Jan 1 2009

Fingerprint

brushes
salts
reflectance
neutrons
chlorides
surface properties
screening
polymerization
quartz
interactions
polymers
atoms
ions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Characterization of swollen structure of high-density polyelectrolyte brushes in salt solution by neutron reflectivity. / Kobayashi, Motoyasu; Terayama, Yuki; Hino, Masahiro; Ishihara, Kazuhiko; Takahara, Atsushi.

In: Journal of Physics: Conference Series, Vol. 184, 012010, 01.01.2009.

Research output: Contribution to journalArticle

@article{c4fccae90d9946108f996ef9d33999ec,
title = "Characterization of swollen structure of high-density polyelectrolyte brushes in salt solution by neutron reflectivity",
abstract = "Zwitterionic and cationic polyelectrolyte brushes on quartz substrate were prepared by surface-initiated atom transfer radical polymerization of 2-(methacryloyloxy)ethyl phosphorylcholine (MPC) and 2-(methacryloyloxy) ethyltrimethylammonium chloride (METAC), respectively. The effects of ionic strength on brush structure and surface properties of densely grafted polyelectrolyte brushes were analysed by neutron reflectivity (NR) measurements. NR at poly(METAC)/D2O and poly(MPC)/D2O interface revealed that the grafted polymer chains were fairly extended from the substrate surface, while the thickness reduction of poly(METAC) brush was observed in 5.6 M NaCl/D2O solution due to the screening of the repulsive interaction between polycations by hydrated salt ions. Interestingly, no structural change was observed in poly(MPC) brush even in a salt solution probably due to the unique interaction properties of phosphorylcholine units.",
author = "Motoyasu Kobayashi and Yuki Terayama and Masahiro Hino and Kazuhiko Ishihara and Atsushi Takahara",
year = "2009",
month = "1",
day = "1",
doi = "10.1088/1742-6596/184/1/012010",
language = "English",
volume = "184",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing Ltd.",

}

TY - JOUR

T1 - Characterization of swollen structure of high-density polyelectrolyte brushes in salt solution by neutron reflectivity

AU - Kobayashi, Motoyasu

AU - Terayama, Yuki

AU - Hino, Masahiro

AU - Ishihara, Kazuhiko

AU - Takahara, Atsushi

PY - 2009/1/1

Y1 - 2009/1/1

N2 - Zwitterionic and cationic polyelectrolyte brushes on quartz substrate were prepared by surface-initiated atom transfer radical polymerization of 2-(methacryloyloxy)ethyl phosphorylcholine (MPC) and 2-(methacryloyloxy) ethyltrimethylammonium chloride (METAC), respectively. The effects of ionic strength on brush structure and surface properties of densely grafted polyelectrolyte brushes were analysed by neutron reflectivity (NR) measurements. NR at poly(METAC)/D2O and poly(MPC)/D2O interface revealed that the grafted polymer chains were fairly extended from the substrate surface, while the thickness reduction of poly(METAC) brush was observed in 5.6 M NaCl/D2O solution due to the screening of the repulsive interaction between polycations by hydrated salt ions. Interestingly, no structural change was observed in poly(MPC) brush even in a salt solution probably due to the unique interaction properties of phosphorylcholine units.

AB - Zwitterionic and cationic polyelectrolyte brushes on quartz substrate were prepared by surface-initiated atom transfer radical polymerization of 2-(methacryloyloxy)ethyl phosphorylcholine (MPC) and 2-(methacryloyloxy) ethyltrimethylammonium chloride (METAC), respectively. The effects of ionic strength on brush structure and surface properties of densely grafted polyelectrolyte brushes were analysed by neutron reflectivity (NR) measurements. NR at poly(METAC)/D2O and poly(MPC)/D2O interface revealed that the grafted polymer chains were fairly extended from the substrate surface, while the thickness reduction of poly(METAC) brush was observed in 5.6 M NaCl/D2O solution due to the screening of the repulsive interaction between polycations by hydrated salt ions. Interestingly, no structural change was observed in poly(MPC) brush even in a salt solution probably due to the unique interaction properties of phosphorylcholine units.

UR - http://www.scopus.com/inward/record.url?scp=69649106309&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=69649106309&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/184/1/012010

DO - 10.1088/1742-6596/184/1/012010

M3 - Article

AN - SCOPUS:69649106309

VL - 184

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

M1 - 012010

ER -