Preparation and characterization of poly sodium acrylate/bentonite with anion-exchange function composite
To achieve superabsorbent composite, acrylic was intercalated into alkaline Ca-bentonite to prepare acrylic bentonite; then polysodium acrylate/bentonite with anion-exchange function composite was synthesized. The structure of the composite was characterized by XRD and SEM. The results indicate that intercalated and/or exfoliated structures were formed between the acrylic and alkaline Ca-bentonite. The thermal stability of the composite was characterized by TGA. The results indicate that the thermal stability of the nanocomposites rose 15.2℃ compared to that of polyacrylic. The adsorption and water retention of the composites was tested at last. In the optimal condition (75℃, dosage of the initiator was 1.8％ of monomer mass, dosage of the crosslinker was 0.55％, dosage of acrylic bentonite was 5％, and the neutralization degree was 68.5％ ), the absorbency of the materials was 956 g/g in deionized water and 80 g/g in 0.9wt％ NaCl; the water retention property of the composites was excellent.
国家科技期刊平台
NSTL
万方数据
维普
