Grafting of butanediols onto the interlamellar of kaolinite

Abstract

Kaolinite was organically modified with butanediols by the reaction between methoxy-modified kaolinite and 1,2-(and 1,3-)butanediols. Butanediols were grafted onto the interlayer surface of kaolinite by transesterification of methoxy-modified kaolinite, which was shown by XRD, TG-DTA, and ¹³C CP/MAS NMR data. During the reaction, the amounts of the alkoxy groups per Al₂Si₂O₅(OH)₄ increased. This finding suggests that further esterification of AlOH groups with butanediols also occurred.