Effects of DS and different modified MMT on properties of superabsorbent nanocomposites

The wheat straws were used as raw material for carboxymethylcellulose(CMC).Then CMC/acrylic polymer/OMMT superabsorbent nanocomposites were synthesized using OMMT organised with various organic quaternary ammonium cations via in-situ polymerization of CMC,acrylic polymer.Effects of alkali dosage and chloroacetic acid dosage on DS and weight percentage gain(WPG) of CMC,and the relationships among DS,graft ratio,graft efficiency and water-absorption were investigated.It analyzed the influence of OMMT modified by various quaternary ammonium salts on properties of nanocomposites.The nanocomposites were characterized by Fourier transform infrared spectrometer (FTIR) and X-ray diffraction(XRD).CMC and monomers has polymerized in the layer of OMMT successfully.The bigger volume of substituents of quaternary ammonium cations,the greater the distance between layers.The nanocomposite formed could be categorized as an exfoliated nanocomposite.