6533b7d3fe1ef96bd1260988

RESEARCH PRODUCT

Insights into grafting of (3-Mercaptopropyl) trimethoxy silane on halloysite nanotubes surface

Giuseppe LazzaraAlexander V. PestovAlexander V. PestovA.m. Abu El-soadV. A. OsipovaGiuseppe CavallaroD. P. TambasovaN. A. MartemyanovE. G. Kovaleva

subject

Thermogravimetric analysisengineering.material010402 general chemistry01 natural sciencesBiochemistryHalloysiteOrganosilanesCatalysisInorganic Chemistrychemistry.chemical_compoundMaterials ChemistryPhysical and Theoretical ChemistryAcetonitrileTetrahydrofuranGrafting010405 organic chemistryOrganic ChemistryHalloysiteThermogravimetric analysisSilane0104 chemical sciencesFT-IRSolventchemistryChemical engineeringSEMNanoclayengineeringSurface modification

description

Abstract Functionalization of halloysite nanotubes surface by using organosilanes is sensitive to the reaction conditions. Halloysite nanotubes (HNTs) were modified using (3-Mercaptopropyl) trimethoxy silane (MPTMS). The experiments were performed under different reaction conditions including, various solvents [Toluene, Tetrahydrofuran (THF), Ethanol, n-Hexane, 1,4 Dioxane and Acetonitrile], water content in the reaction media, volume of solvent, number of moles of silane and catalysts (triethyl amine, ammonia solution and tetra-ethoxy titanium). The elemental analysis, FT-IR analysis were used to identify the samples, which attained the highest percent of functionalization. SEM image and thermogravimetric analysis were provided for the pristine halloysite nanotubes and the modified halloysite nanotubes samples. This work provides a systematic investigation of the reaction conditions highlighting the best protocol to perform such a modification that represents a relevant strategy to control the surface properties of halloysite nanotubes as well as the optimization of the first step toward further modifications of this nano clay.

yearjournalcountryeditionlanguage
2020-06-01Journal of Organometallic Chemistry
https://doi.org/10.1016/j.jorganchem.2020.121224