Nanocomposites based on plasticized starch and rectorite clay: Structure and properties

► CREC was firstly prepared by modifying REC with CGG in the cationic-exchange reaction. ► REC and CREC were used as the fillers of PS matrix in the casting process. ► The interaction existed between REC (or CREC) filler and PS matrix. ► The dispersion of CREC agglomeration in the matrix was not as good as REC filler. ► REC and CREC improved thermal stability, tensile strength and water vapor barrier.