Toward a Delaminated Organotalc: The Use of Polyamidoamine Dendrons

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• 作者：Marcos A. S. Andrade Jr. ; Heloise O. Pastore
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：January 27, 2016
• 年：2016
• 卷：8
• 期：3
• 页码：1884-1892
• 全文大小：638K
• ISSN：1944-8252

文摘

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 ¹³C 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 COb>2b>/g of sorbent at 30 °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 COb>2b> 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 COb>2b> interaction sites.