Preparation of lignocellulose-g-acrylic acid/montmorillonite hydrogels and its adsorption

Lignocellulose-g-acrylic acid/Montmorillonite(LNC-g-AA/MMT) hydrogels with three-dimensional cross-linked polymeric networks were prepared by a in situ intercalative polymerization technique.The effects of the mass ratio of acrylic acid to lignocellulose,acrylic acid monomer concentration,neutralization degree,initiator and crosslinking agents of superabsorbent composites were explored.The adsorption capacity of LNC-g-AA/MMT was 1994.38 mg/g.And the desorption of MB onto the LNC-g-AA/MMT was experimentally determined,the desorption efficiency of LNC-g-AA/MMT was to 83.4%.The structure of the samples were characterized by XRD、TEM and TG.The results show that lignocellulose-g-acrylic acid intercalates into montmorillonite interlayer via destroying the crystalline structure of montmorillonite,and the exfoliated structure is formed in LNC-g-AA/MMT with better thermal stability.