粘土/纤维素基凝胶的制备及其性能研究

In this thesis, cellulose waste as raw material, acrylic acid and acrylamide monomer , clay reinforcements , graft copolymerization of clay / cellulose-based gel. The effect of the pre- polymerization time , add the amount of clay and other cellulose -based gel morphology, structure and properties ; On this basis, the swelling behavior of clay/cellulose-based gel in deionized water, 0.9 Wt% Nacl solution and tap water at different temperatures, water retention property of gel under different temperatures and pressures，repeat water absorbing performance and the removal performance of heavy metal ions were investigated. The results show that the prepared clay / cellulose-based foam having a porous structure in communication ; inserted inside the gel lamellar clay significantly improved the strength of the swollen gel when the clay dosage 3 %, the mechanical strength of the gel the initial increase of 3.7 kPa to 10.6 kPa. Gel obtain a maximum adsorption capacity in deionized water , followed by water, 0.9 Wt% Nacl solution. Samples with good water retention properties at different temperatures and pressures, maintain a higher swelling properties after 8 cycles of repeated water adsorption. Metal ions removal was found that 0.2 g sample in the initial concentration of 500 mg / l of Cr(Ⅲ), Cu(Ⅱ), Co(Ⅱ), Ni(Ⅱ) in solutions obtain adsorption capacity of 121.4, 149.8, 102.2, 112.1 mg/g respectively. Studies indicating that the sample has potential recycling performance and perfect metal ions adsorption separation capacity, widely used in the water retention of agroforestry , heavy metal pollution control and other fields.