Fabrication and Structural Characterization of Module-Assembled Amphiphilic Conetwork Gels

Takashi Hiroi; Shinji Kondo; Takamasa Sakai; Elliot Paul Gilbert; Young Soo Han; Tae Hwan Kim; Mitsuhiro Shibayama

doi:10.1021/acs.macromol.6b00842

Fabrication and Structural Characterization of Module-Assembled Amphiphilic Conetwork Gels

Takashi Hiroi^*
, Shinji Kondo
, Takamasa Sakai
, Elliot Paul Gilbert
, Young Soo Han
, Tae Hwan Kim
, Mitsuhiro Shibayama

^*Corresponding author for this work

Department of Quantum System Engineering

The University of Tokyo
Australian Nuclear Science and Technology Organisation
Korea Atomic Energy Research Institute

Research output: Contribution to journal › Journal article › peer-review

50 Scopus citations

Abstract

Structural analysis of inhomogeneity-free poly(ethylene glycol)-poly(dimethylsiloxane) (PEG-PDMS) amphiphilic conetwork gels has been performed by the complementary use of small-angle X-ray and neutron scattering. Because of the hydrophobicity of PDMS units, the PEG-PDMS gels exhibit a microphase-separated structure in water. Depending on the volume fraction of PDMS, the microphase-separated structure varies from core-shell to lamellar. The obtained X-ray and neutron scattering profiles are reproduced well using a core-shell model together with a Percus-Yevick structure factor when the volume fraction of PDMS is small. The domain size is much larger than the size of individual PEG and PDMS unit, and this is explained using the theory of block copolymers. Reflecting the homogeneous dispersion conditions in the as-prepared state, scattering peaks are observed even at a very low PDMS volume fraction (0.2%). When the volume fraction of PDMS is large, the microphase-separated structure is lamellar and is demonstrated to be kinetically controlled by nonequilibrium and topological effects.

Original language	English
Pages (from-to)	4940-4947
Number of pages	8
Journal	Macromolecules
Volume	49
Issue number	13
DOIs	https://doi.org/10.1021/acs.macromol.6b00842
State	Published - 2016.07.12

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@article{b52526ead613484188edd5511bbf13d1,

title = "Fabrication and Structural Characterization of Module-Assembled Amphiphilic Conetwork Gels",

abstract = "Structural analysis of inhomogeneity-free poly(ethylene glycol)-poly(dimethylsiloxane) (PEG-PDMS) amphiphilic conetwork gels has been performed by the complementary use of small-angle X-ray and neutron scattering. Because of the hydrophobicity of PDMS units, the PEG-PDMS gels exhibit a microphase-separated structure in water. Depending on the volume fraction of PDMS, the microphase-separated structure varies from core-shell to lamellar. The obtained X-ray and neutron scattering profiles are reproduced well using a core-shell model together with a Percus-Yevick structure factor when the volume fraction of PDMS is small. The domain size is much larger than the size of individual PEG and PDMS unit, and this is explained using the theory of block copolymers. Reflecting the homogeneous dispersion conditions in the as-prepared state, scattering peaks are observed even at a very low PDMS volume fraction (0.2\%). When the volume fraction of PDMS is large, the microphase-separated structure is lamellar and is demonstrated to be kinetically controlled by nonequilibrium and topological effects.",

author = "Takashi Hiroi and Shinji Kondo and Takamasa Sakai and Gilbert, \{Elliot Paul\} and Han, \{Young Soo\} and Kim, \{Tae Hwan\} and Mitsuhiro Shibayama",

note = "Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

year = "2016",

month = jul,

day = "12",

doi = "10.1021/acs.macromol.6b00842",

language = "English",

volume = "49",

pages = "4940--4947",

journal = "Macromolecules",

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TY - JOUR

T1 - Fabrication and Structural Characterization of Module-Assembled Amphiphilic Conetwork Gels

AU - Hiroi, Takashi

AU - Kondo, Shinji

AU - Sakai, Takamasa

AU - Gilbert, Elliot Paul

AU - Han, Young Soo

AU - Kim, Tae Hwan

AU - Shibayama, Mitsuhiro

PY - 2016/7/12

Y1 - 2016/7/12

N2 - Structural analysis of inhomogeneity-free poly(ethylene glycol)-poly(dimethylsiloxane) (PEG-PDMS) amphiphilic conetwork gels has been performed by the complementary use of small-angle X-ray and neutron scattering. Because of the hydrophobicity of PDMS units, the PEG-PDMS gels exhibit a microphase-separated structure in water. Depending on the volume fraction of PDMS, the microphase-separated structure varies from core-shell to lamellar. The obtained X-ray and neutron scattering profiles are reproduced well using a core-shell model together with a Percus-Yevick structure factor when the volume fraction of PDMS is small. The domain size is much larger than the size of individual PEG and PDMS unit, and this is explained using the theory of block copolymers. Reflecting the homogeneous dispersion conditions in the as-prepared state, scattering peaks are observed even at a very low PDMS volume fraction (0.2%). When the volume fraction of PDMS is large, the microphase-separated structure is lamellar and is demonstrated to be kinetically controlled by nonequilibrium and topological effects.

AB - Structural analysis of inhomogeneity-free poly(ethylene glycol)-poly(dimethylsiloxane) (PEG-PDMS) amphiphilic conetwork gels has been performed by the complementary use of small-angle X-ray and neutron scattering. Because of the hydrophobicity of PDMS units, the PEG-PDMS gels exhibit a microphase-separated structure in water. Depending on the volume fraction of PDMS, the microphase-separated structure varies from core-shell to lamellar. The obtained X-ray and neutron scattering profiles are reproduced well using a core-shell model together with a Percus-Yevick structure factor when the volume fraction of PDMS is small. The domain size is much larger than the size of individual PEG and PDMS unit, and this is explained using the theory of block copolymers. Reflecting the homogeneous dispersion conditions in the as-prepared state, scattering peaks are observed even at a very low PDMS volume fraction (0.2%). When the volume fraction of PDMS is large, the microphase-separated structure is lamellar and is demonstrated to be kinetically controlled by nonequilibrium and topological effects.

UR - https://www.scopus.com/pages/publications/84978818886

U2 - 10.1021/acs.macromol.6b00842

DO - 10.1021/acs.macromol.6b00842

M3 - Journal article

AN - SCOPUS:84978818886

SN - 0024-9297

VL - 49

SP - 4940

EP - 4947

JO - Macromolecules

JF - Macromolecules

IS - 13

ER -

Fabrication and Structural Characterization of Module-Assembled Amphiphilic Conetwork Gels

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