TY - JOUR
T1 - Formation of ordered macropores and templated nanopores in silica sol-gel system incorporated with EO-PO-EO triblock copolymer
AU - Sato, Yosuke
AU - Nakanishi, Kazuki
AU - Hirao, Kazuyuki
AU - Jinnai, Hiroshi
AU - Shibayama, Mitsuhiro
AU - Melnichenko, Yuri B.
AU - Wignall, George D.
N1 - Funding Information:
The research at Oak Ridge supported by the US Department of Energy under contract DE-AC05-00OR22725 with the Oak Ridge National Laboratory, managed by UT-Battelle, LLC. H.J. and M.S. thank Dr J.A. Fernandez-Baca (ORNL), Professor H. Yoshizawa and Professor Y. Fujii (University of Tokyo), Professor H. Yamaoka and Profesor H. Matsuoka (Kyoto University) for their arrangement for the SANS experiments. Financial support from Grant-in-Aid for Scientific Research, Ministry of Education, Science, Sports and Culture, Japan (12450268), is gratefully acknowledged.
PY - 2001/8/31
Y1 - 2001/8/31
N2 - Silica gels with well-defined co-continuous gel skeletons and pore in the micrometer range have been prepared using a poly(ethylene oxide-propylene oxide-ethylene oxide (EO-PO-EO)) triblock copolymer. Being essentially independent of the micrometer-range structure, the mesopore exhibited narrow distributions around an identical median size and its volume was correlated well to the concentration of triblock copolymer. Small-angle neutron scattering of wet, dried and heat-treated gels revealed that the mesopore structure had been already templated at the sol-gel transition, and was preserved or even enhanced during the removal of solvent and carbonaceous constituents.
AB - Silica gels with well-defined co-continuous gel skeletons and pore in the micrometer range have been prepared using a poly(ethylene oxide-propylene oxide-ethylene oxide (EO-PO-EO)) triblock copolymer. Being essentially independent of the micrometer-range structure, the mesopore exhibited narrow distributions around an identical median size and its volume was correlated well to the concentration of triblock copolymer. Small-angle neutron scattering of wet, dried and heat-treated gels revealed that the mesopore structure had been already templated at the sol-gel transition, and was preserved or even enhanced during the removal of solvent and carbonaceous constituents.
KW - Phase separation
KW - SANS
KW - Self-organization
KW - Silica
KW - Sol-gel
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U2 - 10.1016/S0927-7757(01)00626-4
DO - 10.1016/S0927-7757(01)00626-4
M3 - Article
AN - SCOPUS:0035979939
VL - 187-188
SP - 117
EP - 122
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
ER -