Электронный каталог

Статья

Lermontov, S.A.
The Dramatic Influence of Gelation Solvent Choice on the Structure and Mechanical Properties of Resorcinol-Formaldehyde Aerogels / S.A.Lermontov, Yu.E.Gorshkova, [a.o.] // Journal of Porous Materials [Electronic resource]. – 2023. – Vol. 30, No. 2. – P. 589-598. – URL: https://doi.org/10.1007/s10934-022-01365-4. – Bibliogr.: 78.

Resorcinol-formaldehyde aerogels were synthesised using acid-catalysed polycondensation of resorcinol and formaldehyde in acetonitrile or dimethyl sulfoxide, followed by supercritical drying in CO 2 . The structure and mechanical properties of the aerogels were analysed using low temperature nitrogen adsorption, scanning electron microscopy, small-angle neutron scat- tering and stress-strain measurements in compression regime. The resorcinol-formaldehyde aerogels possessed a high specific surface area (200–510 m 2 /g) and porosity (41–82%), with a surface fractal dimension of 2.2–2.5. The mechanical strength of the materials reached high values (up to 31 MPa) and was well correlated with the density of aerogels (0.27–0.86 g/cm 3 ). The results obtained demonstrate the dramatic influence of the nature of a solvent used during the gelation of resorcinol- formaldehyde aerogels on their structure and properties



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 342 г1 - Замедление и диффузия нейтронов. Дифракция