Preparation and characterization of cellulose/montmorillonite hybrid membranes

摘要

The compounding of cellulose and inorganic Montmorillonite (MMT) on microscale molecular level has highudpotential to greatly improve the thermal stability, decay resistance and other properties of cellulose fibres. PristineudAlgerian MMT was first sodium modified as Na-MMT, then organically modified as organophilic OMMT by usingudOctadecylamine. With OMMT and fibrous cellulose from waste cotton, cellulose/MMT composites were prepared viaudincorporation from solution process and characterized by XRD, FTIR and TGA. Dimethyl Acetamide/Lithium Chlorideud(DMAc/LiCl) solvent system was used for dispersing cellulose and clay. Results show that the preparation of OMMT wasudvery successful; the X-ray diffraction results revealed that the interlayer spacing (2.17nm) for OMMT was increasedudcompared with that (1.24nm) for Na-MMT. The composites exhibit higher thermal stability; addition of OMMT canudconsiderably increase the decomposition temperature of cellulose matrix. An increase in thermal stability with clayudcontent was observed by thermal analysis