PREPARATION OF A KAOLINITE-ACRYLIC ACID INTERCALATION COMPOUND AND THE HEAT-TREATED PRODUCTS

Abstract

Acrylic acid was intercalated between the layers of kaolinite by the use of a kaolinitedimethylsulfoxide (DMSO) intercalation compound as the intermediate. The reaction product of a kaolinite-DMSO intercalate with acrylic acid showed the basal spacing of 11.7 Å, suggesting the formation of a new intercalation compound. The IR spectrum of the product exhibited that the profiles arising from the interaction between the kaolinite layers and the interlayer organic species changed as compared with the kaolinite-DMSO system. X-ray fluorescence analysis showed the presence of DMSO, indicating the coexistence of both DMSO and acrylic acid between the layers. This finding was supported by the ¹³C CP/MAS NMR spectrum of the product. By the heat treatment of the product at 250°C for 1 h, acrylic acid was not polymerized possibly because of its complicated arrangement with co-existed DMSO.