Structural formation of hybrid siloxane-based polymer monolith in confined spaces

Journal of Separation Science
Kazuyoshi KanamoriHiroshi Jinnai

Abstract

Structural deformation of phase-separated methylsiloxane gel under the influence of a surface has been studied. Competitive wetting of siloxane gel phase on a surface during phase formation is found to significantly affect the final morphology in a confined space. When the spinodal wavelength is sufficiently shorter than the size of the available space, a uniform bicontinuous structure forms in confined geometry. However, gel skeletons in the vicinity of a surface are elongated with decreasing size of the space, and finally when the size of the space becomes shorter than the spinodal wavelength, all the gel phase wets on a surface, showing a "wetting transition". Homogeneous bicontinuous methylsiloxane gels were successfully prepared, avoiding such structural deformation, in a long cylindrical fused silica capillary and used for capillary HPLC. The capillary gels exhibited excellent separation efficiency of nitrobenzenes and it was found that the surface character can be altered by incorporating surfactants, which will enable more advanced and extended control of surface character, depending on the analytes.

References

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Citations

Sep 4, 2009·The Review of Scientific Instruments·Gabriel OhlssonBengt Kasemo
Aug 12, 2009·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Kumiko Sakai-Kato, Keiko Ishikura
Oct 10, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Racha El-DebsClaire Demesmay
Oct 29, 2014·Proceedings of the National Academy of Sciences of the United States of America·Miho YanagisawaMasayuki Tokita
Jan 21, 2017·Chemistry : a European Journal·Taiyo ShimizuKazuki Nakanishi
Feb 5, 2008·Journal of Colloid and Interface Science·Graham T T GibsonRichard D Oleschuk
Apr 16, 2015·Chemical Science·Haoliang LiuCheng-Yong Su
Dec 13, 2006·Journal of Separation Science·Kazuyoshi KanamoriTeiichi Hanada
Jun 8, 2011·Journal of Separation Science·Dzmitry HlushkouUlrich Tallarek
Jan 1, 2016·Journal of Separation Science·El-Debs RachaClaire Demesmay
Aug 6, 2010·Analytical Chemistry·Dzmitry HlushkouUlrich Tallarek
Aug 7, 2010·Analytical Chemistry·Frederik DetobelGert Desmet
Sep 20, 2017·Analytical Chemistry·Takeshi HaraGert Desmet
Apr 26, 2012·ACS Applied Materials & Interfaces·George HasegawaKazuki Nakanishi
Jun 12, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Linbin WangQifang Li

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