Systematic DSC analysis of the melting point depression and the non-freezable layer width in different mesopore sizes in carbon xerogels

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F25%3AA2603BJI" target="_blank" >RIV/61988987:17310/25:A2603BJI - isvavai.cz</a>
Result on the web
<a href="https://linkinghub.elsevier.com/retrieve/pii/S0040603125002035" target="_blank" >https://linkinghub.elsevier.com/retrieve/pii/S0040603125002035</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.tca.2025.180128" target="_blank" >10.1016/j.tca.2025.180128</a>

Result language
angličtina
Original language name
Systematic DSC analysis of the melting point depression and the non-freezable layer width in different mesopore sizes in carbon xerogels
Original language description
The individual effect of pore size on the melting behaviour of probe liquid confined in material pores, as well as on parameters used to convert differential scanning calorimetry (DSC) data into pore size distribution (PSD) was systematically investigated. For thermoporometric testing, a tailored series of carbon xerogels with uniform pore shape and surface chemistry but varying pore sizes (10 - 50 nm) was prepared, and water was chosen as a probe liquid. The observed decreasing relation between water melting point depression and carbon xerogels pore radius confirmed the suitability of modified Gibbs-Thomson equation for PSD determination. A good linear correlation was established between the DSC peak area (representing heat of fusion of pore-confined ice) and pore volume, with the relation notably affected by pore size. The experimentally derived Gibbs-Thomson constant (39 nm K) deviated significantly from the commonly accepted one, and the non-freezable layer width (the delta layer) increased with increasing pore size.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10400 - Chemical sciences

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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