Functionalization of halloysite with N-(2-aminoethyl)-3-aminopropyl-trimethoxysilane

In order to increase the affinity of the halloysite mineral to 3d-metal ions, its surface was functionalized with N -(2-aminoethyl)-3-aminopropyltrimethoxysilane. A significant influence of the nature of the solvent and silane concentration on the degree of functionalization of halloysite was reveal...

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Bibliographic Details
Published in:Russian chemical bulletin 2021-06, Vol.70 (6), p.1180-1184
Main Authors: Osipova, V. A., Pestov, A. V., Mekhaev, A. V., Abuelsoad, A. M. A., Tambasova, D. P., Kovaleva, E. G.
Format: Article
Language:English
Subjects:
Acetonitrile
Chelation
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
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Inorganic Chemistry
Organic Chemistry
Silanes
Solvents
Tetrahydrofuran
Thermogravimetry
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Summary:In order to increase the affinity of the halloysite mineral to 3d-metal ions, its surface was functionalized with N -(2-aminoethyl)-3-aminopropyltrimethoxysilane. A significant influence of the nature of the solvent and silane concentration on the degree of functionalization of halloysite was revealed. According to the data of elemental analysis, FTIR spectroscopy, and thermogravimetry, it was found that the most efficient solvents were tetrahydrofuran and acetonitrile at an equimolar silane to halloysite ratio. The functionalization of halloysite with N -(2-aminoethyl)-3-aminopropylsilyl groups significantly increases the sorption capacity of the material in comparison with both unmodified halloysite and halloysite functionalized with non-chelating 3-aminopropylsilyl groups.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-021-3202-7