mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal Universitymrisel-173Research ArticleСтатьиStudying the initial stages of gelation process in colloidal silica on basis of synthetic silicates by NMR microimaging and relaxometryMorozovE. V.

Akademgorodok, 50, Krasnoyarsk 660036; Mira, 53, Krasnoyarsk 660049

morozov_sfu@mail.ruShabanovaO. V.

Mira, 53, Krasnoyarsk 660049

PavlovV. F.

Mira, 53, Krasnoyarsk 660049

FalaleevO. V.

Akademgorodok, 50, Krasnoyarsk 660036; Mira, 53, Krasnoyarsk 660049

Kirensky Institute of Physics SB RAS; Special Designing and Technological Bureau "Nauka"Russian FederationSpecial Designing and Technological Bureau "Nauka"Russian Federation20102001202412116Copyright © Morozov E.V., Shabanova O.V., Pavlov V.F., Falaleev O.V., 20242024Morozov E.V., Shabanova O.V., Pavlov V.F., Falaleev O.V.Morozov E.V., Shabanova O.V., Pavlov V.F., Falaleev O.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/173

The acid silicious sols obtained from synthetic silicates were investigated in this work. Using NMR microimaging it was found out the formation of considerable inhomogeneities in optically limpid samples at different stages of gel formation. They were interpreted as silicic acid polycondensation fronts. It was observed the character of spreading and fine structure of the fronts. By means of NMR relaxometry were discovered the some interesting effects at the relaxation dependences in time intervals, corresponding to gel formation transitional stages.

NMR microimagingrelaxometrycolloidal silicafoamed silicatebasalt mineral woolReferencesKoptug I.V., Sagdeev R.Z. Uspekhi Khimii 71, № 7, 672 (2002) (in Russian)Koptug I.V., Sagdeev R.Z. Uspekhi Khimii 71, № 7, 672 (2002) (in Russian)Shabanova N.A., Sarcisov P.D. Basis of nanodespersed silica sol-gel technologies, Akademkniga, Moscow (2004) (in Russian)Shabanova N.A., Sarcisov P.D. Basis of nanodespersed silica sol-gel technologies, Akademkniga, Moscow (2004) (in Russian)Shabanov V.F., Pavlov V.F., Pavlenko N.I. Stroilelnie Materiali, № 4, 40 (2002) (in Russian)Shabanov V.F., Pavlov V.F., Pavlenko N.I. Stroilelnie Materiali, № 4, 40 (2002) (in Russian)Callaghan P. Principles of nuclear magnetic resonance microscopy, Clarendon Press, Oxford (1991)Callaghan P. Principles of nuclear magnetic resonance microscopy, Clarendon Press, Oxford (1991)Iler, R. Chemistry of silica, Mir, Moscow, 809 (1982) (in Russian)Iler, R. Chemistry of silica, Mir, Moscow, 809 (1982) (in Russian)

The authors declare that there are no conflicts of interest present.