Toward a Delaminated Organotalc: The Use of Polyamidoamine Dendrons

Autor(es)

Andrade, Jr., Marcos A. S. ^[1] ; Pastore, Heloise O. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Chem, Micro & Mesoporous Mol Sieves Grp, 270 Monteiro Lobato St, Cidade Univ Zeferino Vaz, BR-13083861 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED MATERIALS & INTERFACES; v. 8, n. 3, p. 1884-1892, JAN 27 2016.
• Citações Web of Science: 8

Resumo

A sequence of generations of the polyamideamine dendron, PAMAM-talc-Gn (n = 1-7), was constructed on the surfaces of ethylenediaminepropyl-functionalized magnesium phyllosilicate lamellas by using a modified microwave-assisted synthesis. The successful functionalization of the inorganic layers by the organic dendrimer was confirmed by FTIR and C-13 NMR spectroscopies, elemental analyses, and thermogravimetric analysis (TGA). The solid materials presented an increase in their interlamellar space and disorganization of lamella packing with the growth of the dendrons. Thermal-programmed desorption analysis showed that the lower dendron generation, PAMAM-talc-G1, adsorbed 1.30 mmol of CO2/g of sorbent at 30 degrees C. PAMAM-talc-G5 adsorbed the double of PAMAM-talc-G3, probably due to the higher amount of the primary amine group; however, PAMAM-talc-G5 adsorbed more CO2 than PAMAM-talc-G7 probably because in the delaminated seventh generation intradendron N-H interactions were more prevalent than in the fifth generation and blocked CO2 interaction sites. (AU)

• Processo FAPESP: 14/06942-0 - Sólidos lamelares nanoestruturados como catalisadores ácidos, básicos e redox
• Beneficiário: Heloise de Oliveira Pastore
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/05911-1 - Polieletrólitos lamelares sólidos e em gel para aplicação em células solares de corantes
• Beneficiário: Marcos Antonio Santana Andrade Junior
• Modalidade de apoio: Bolsas no Brasil - Doutorado