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Unveiling the Interstitial Pressure Between Growing Ice Crystals During Ice-Templating Using a Lipid Lamellar Probe

Abstract : What is pressure generated by ice crystals during ice-templating? This work addresses this crucial question by estimating the pressure exerted by oriented ice columns on a supramolecular probe composed of a lipid lamellar hydrogel during directional freezing. This process, also known as freeze-casting, has emerged as a unique processing technique for a broad class of organic, inorganic, soft and biological materials. Nonetheless, the pressure exerted during and after crystallization between two ice columns is not known, despite its importance with respect to the fragility of the frozen material, especially for biological samples. By using the lamellar period of a glycolipid lamellar hydrogel as a common probe, we couple data obtained from ice-templated-resolved in situ synchrotron Small Angle X-ray Scattering (SAXS) with data obtained from controlled adiabatic dessication experiments. We estimate the pressure to vary between 1 ± 10% kbar at-15°C and 3.5 ± 20% kbar at-60°C.
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https://hal.archives-ouvertes.fr/hal-02490271
Contributor : Niki Baccile <>
Submitted on : Tuesday, February 25, 2020 - 9:47:54 AM
Last modification on : Friday, October 30, 2020 - 2:12:02 PM
Long-term archiving on: : Tuesday, May 26, 2020 - 1:01:30 PM

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10.1021_acs.jpclett.9b03347 - ...
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Niki Baccile, Thomas Zinn, Guillaume Laurent, Ghazi Messaoud, Viviana Cristiglio, et al.. Unveiling the Interstitial Pressure Between Growing Ice Crystals During Ice-Templating Using a Lipid Lamellar Probe. Journal of Physical Chemistry Letters, American Chemical Society, 2020, 11 (6), pp.1989-1997. ⟨10.1021/acs.jpclett.9b03347⟩. ⟨hal-02490271⟩

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