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RESEARCH PRODUCT

Synthesis, characterization and study of covalently modified triazole LAPONITE® edges

Stefana MiliotoSerena RielaGiuseppe LazzaraIvana PibiriRenato NotoGiuseppe CavallaroMarina MassaroCarmelo Giuseppe Colletti

subject

LAPONITE® Covalent modification Triazole moieties HydrogelThermogravimetric analysisMaterials scienceTriazole020101 civil engineeringGeology02 engineering and technologySettore CHIM/06 - Chimica OrganicaPropargyl alcohol021001 nanoscience & nanotechnology0201 civil engineeringlaw.inventionchemistry.chemical_compoundchemistryChemical engineeringDynamic light scatteringOptical microscopeGeochemistry and PetrologylawCovalent bondSurface modification0210 nano-technologySpectroscopySettore CHIM/02 - Chimica Fisica

description

Abstract LAPONITE® (Lap) clay mineral was successful functionalized by triazole groups in a two steps procedure. First, the Lap edges were modified with 3-azidopropyltrimethoxysilane by traditional heating and microwave irradiation. Microwave irradiation allowed us to obtain high loading onto the Lap edges in lower times compared to those obtained through conventional method. Afterwards, the triazole moieties were obtained by reaction between azido functionalized Lap and propargyl alcohol. The successful functionalization of Lap was proved by thermogravimetric analysis, FT-IR spectroscopy, dynamic light scattering and ζ-potential measurements. Finally, the effects of the surface modification on the gel formation ability of Lap were studied by gelation tests and the morphology of the gel phases was investigated by polarized optical microscopy measurements and diffusion experiments.

10.1016/j.clay.2020.105489http://hdl.handle.net/10447/430121