A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Polymer intercalation synthesis of glycoboehmite nanosheets
Abstract Novel materials based on the aluminum oxyhydroxide boehmite phase were prepared using a glycothermal reaction in 1,4-butanediol. Under the synthesis conditions, the atomic structure of the boehmite phase is altered by the glycol solvent in place of the interlayer hydroxyl groups, creating glycoboehmite. The structure of glycoboehmite was examined in detail to determine that glycol molecules are intercalated in a bilayer structure, which would suggest that there is twice the expansion identified previously in the literature. This precursor phase enables synthesis of two new phases that incorporate either polyvinylpyrrolidone or hydroxylpropyl cellulose nonionic polymers. These new materials exhibit changes in morphology, thermal properties, and surface chemistry. All the intercalated phases were investigated using PXRD, HRSTEM, SEM, FT-IR, TGA/DSC, zeta potential titrations, and specific surface area measurement. These intercalation polymers are non-ionic and interact through wetting interactions and hydrogen bonding, rather than by chemisorption or chelation with the aluminum ions in the structure.
Graphical abstract Display Omitted
Highlights Glycothermal process intercalates bilayer glycol structure in boehmite. New approach to intercalate nonionic polymers in layered boehmite sheets. Surface charging properties are made more acidic by glycol bonding. Nonionic polymers increase surface area during calcination processes.
Polymer intercalation synthesis of glycoboehmite nanosheets
Abstract Novel materials based on the aluminum oxyhydroxide boehmite phase were prepared using a glycothermal reaction in 1,4-butanediol. Under the synthesis conditions, the atomic structure of the boehmite phase is altered by the glycol solvent in place of the interlayer hydroxyl groups, creating glycoboehmite. The structure of glycoboehmite was examined in detail to determine that glycol molecules are intercalated in a bilayer structure, which would suggest that there is twice the expansion identified previously in the literature. This precursor phase enables synthesis of two new phases that incorporate either polyvinylpyrrolidone or hydroxylpropyl cellulose nonionic polymers. These new materials exhibit changes in morphology, thermal properties, and surface chemistry. All the intercalated phases were investigated using PXRD, HRSTEM, SEM, FT-IR, TGA/DSC, zeta potential titrations, and specific surface area measurement. These intercalation polymers are non-ionic and interact through wetting interactions and hydrogen bonding, rather than by chemisorption or chelation with the aluminum ions in the structure.
Graphical abstract Display Omitted
Highlights Glycothermal process intercalates bilayer glycol structure in boehmite. New approach to intercalate nonionic polymers in layered boehmite sheets. Surface charging properties are made more acidic by glycol bonding. Nonionic polymers increase surface area during calcination processes.
Polymer intercalation synthesis of glycoboehmite nanosheets
Bell, Nelson S. (author) / Rodriguez, Mark A. (author) / Kotula, Paul (author) / Kruichak, Jessica N. (author) / Hernandez-Sanchez, Bernadette A. (author) / Casillas, Maddison R. (author) / Kolesnichenko, Igor (author) / Matteo, Edward N. (author)
Applied Clay Science ; 214
2021-09-04
Article (Journal)
Electronic Resource
English
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