Temperature dependence of soret coefficient in aqueous and nonaqueous solutions of pullulan

Biomacromolecules
Yuki KishikawaRio Kita

Abstract

We present experimental results of the temperature dependence of the Ludwig-Soret effect for pullulan solutions. The Soret coefficients of 5.0 g L(-1) pullulan in water and in dimethyl sulfoxide (DMSO) were determined in the experimental temperature range between 20.0 and 50.0 degrees C by means of thermal diffusion Forced Rayleigh scattering (TDFRS). The sign of the Soret coefficient of pullulan in water is negative at room temperature, which indicates that the pullulan molecules migrate to the warm side of the fluid. The Soret coefficient of pullulan increases steeply with increase of the solution temperature and shows a sign change from negative to positive at 41.7 degrees C. The positive sign of the Soret coefficient means the pullulan molecules move to the cold side. In contrast to the aqueous solution, the solution of pullulan in DMSO shows a very weak temperature dependence of the Soret coefficient and has always a positive sign. In addition to the TDFRS experiments, we also performed light scattering (LS) experiments for the pullulan solutions under homogeneous temperature condition in a temperature range between 20.0 and 55.0 degrees C. The thermodynamic properties of pullulan solutions obtained by LS show no pronounce...Continue Reading

References

Mar 15, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·E Bringuier, A Bourdon
Nov 13, 2003·Physical Review Letters·Dieter BraunAlbert Libchaber
Dec 20, 2003·Physical Review Letters·Berend-Jan de GansJutta Luettmer-Strathmann
Jul 23, 2004·The Journal of Chemical Physics·Jan K G Dhont
Feb 1, 2006·The European Physical Journal. E, Soft Matter·S IacopiniR Piazza
Jun 15, 2006·The Journal of Physical Chemistry. B·Hui NingSimone Wiegand
Oct 4, 2006·The Journal of Chemical Physics·Meimei Zhang, Florian Müller-Plathe
Oct 10, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Howard Brenner
Dec 14, 2006·Proceedings of the National Academy of Sciences of the United States of America·Stefan Duhr, Dieter Braun
Dec 21, 2006·The Journal of Chemical Physics·Hui Ning, Simone Wiegand
Feb 7, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Jan K G DhontD Braun
May 16, 2007·Physical Review Letters·Alois Würger
Jan 22, 2008·The Journal of Chemical Physics·Pavel Polyakov, Simone Wiegand
Feb 19, 2008·The European Physical Journal. E, Soft Matter·J K G Dhont, W J Briels
Jun 13, 2008·Biomacromolecules·Agnès Rolland-SabatéVéronique Planchot

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Citations

Mar 29, 2011·Biomacromolecules·Pablo BlancoSimone Wiegand
Oct 24, 2014·The European Physical Journal. E, Soft Matter·Kousaku MaedaRio Kita
Jun 6, 2012·The Journal of Physical Chemistry. B·Zilin WangSimone Wiegand
Jul 11, 2013·The Journal of Physical Chemistry. B·Yuki KishikawaShin Yagihara
Apr 5, 2016·Proceedings of the National Academy of Sciences of the United States of America·Doreen NietherSimone Wiegand
Sep 25, 2016·The European Physical Journal. E, Soft Matter·Kazuya EguchiRio Kita
Sep 7, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Doreen Niether, Simone Wiegand
Dec 14, 2017·Physical Chemistry Chemical Physics : PCCP·Doreen NietherSimone Wiegand
Aug 3, 2018·The Journal of Chemical Physics·Doreen NietherSimone Wiegand
May 31, 2019·The European Physical Journal. E, Soft Matter·Monika BjelčićSimone Wiegand
Mar 1, 2021·The Journal of Chemical Physics·Shilpa MohanakumarSimone Wiegand
Aug 6, 2010·The Journal of Physical Chemistry. B·Pablo BlancoSimone Wiegand
Jan 5, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Zilin WangSimone Wiegand
Aug 7, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Doreen NietherSimone Wiegand

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