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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Thermochimica Acta

ISSN

0040-6031

e-ISSN

1872-762X

Svazek periodika

—

Číslo periodika v rámci svazku

November 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

001567623800001

EID výsledku v databázi Scopus

2-s2.0-105014941276