Toward a Delaminated Organotalc: The Use of Polyamidoamine Dendrons

Author(s)

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

Affiliation

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

• Document type: Journal article
• Source: ACS APPLIED MATERIALS & INTERFACES; v. 8, n. 3, p. 1884-1892, JAN 27 2016.
• Web of Science Citations: 8

Abstract

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)

• FAPESP's process: 14/06942-0 - Nanostructured layered solids as acid, basic and redox catalysts
• Grantee: Heloise de Oliveira Pastore
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 13/05911-1 - Layered solid and gel polyelectrolytes for application in dye solar cells
• Grantee: Marcos Antonio Santana Andrade Junior
• Support Opportunities: Scholarships in Brazil - Doctorate