Synthesis and characterization of hybrids derived from vermiculite chloropropyl and aliphatic diamines

Abstract

ALVES, Ana Paula de Melo et al. Synthesis and characterization of hybrids derived from vermiculite chloropropyl and aliphatic diamines. Journal of Thermal Analysis and Calorimetry, v.87, n. 3, p.771–774, 2007.Silylation of vermiculite surface with organosilane (H3CO)3SiR, being R is the corresponding organic moieties –CH2CH2CH2Cl, were carried out to yield organofunctionalized nanomaterial, named as VCl. The product reacted subsequently with three aliphatic diamines H2N (CH2)nNH2 (n=2, 4 and 6). The new hybrids were characterized by elemental analysis, infrared pectroscopy, X-ray diffraction and thermogravimetry. The grafting chloro derivates onto surface amounted to 2.1 mmol g –1. The incorporation of alkyl amines was more effective for butyl>ethylene>hexyldiamines. The sequence is in agreement with thermogravimetry and elemental analysis dat