Surface modification of synthetic clay aimed at biomolecule adsorption: synthesis and characterization



Título del documento: Surface modification of synthetic clay aimed at biomolecule adsorption: synthesis and characterization
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312958
ISSN: 1516-1439
Autores: 1
2
Instituciones: 1Centro Federal de Educacao Tecnologica, Departamento de Engenharia, Belo Horizonte, Minas Gerais. Brasil
2Universidade Federal de Minas Gerais, Departamento de Engenharia Metalurgica e de Materiais, Belo Horizonte, Minas Gerais. Brasil
Año:
Periodo: Ene-Mar
Volumen: 10
Número: 1
Paginación: 37-41
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés This work describes the process for functionalization of laponite through the grafting of 3-mercaptopropyltrimethoxysilane (MPTS). Laponite is synthetic smectite clay with surface area of 350 m²/g. The samples, prior to and after functionalization, were characterized by chemical analyses, thermogravimetric analysis (TGA), x ray diffraction (XRD), diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), scanning electron microscopy and energy dispersive spectrometry (MEV/EDS). Infrared spectroscopy and elemental analyses confirmed the presence of organic chains and thiol groups in the modified clay. The immobilized and available thiol group, measured according to the Volhard method, totaled 1.4 meq/g of clay, with approximately 90% accessible for Ag+ trapping. These results represent an improvement as compared to other works concerning the functionalization of smectite-type clays in which the effect produced by functional group blockage limits the access of species to less than 10% of the complexing sites
Disciplinas: Ingeniería,
Química,
Física y astronomía
Palabras clave: Ingeniería química,
Química industrial,
Física atómica y molecular,
Arcillas,
Catalizadores,
Síntesis química
Keyword: Engineering,
Chemistry,
Physics and astronomy,
Chemical engineering,
Industrial chemistry,
Atomic and molecular physics,
Clays,
Catalysts,
Chemical synthesis
Texto completo: Texto completo (Ver HTML)