Fabrication and swelling properties of a novel superabsorbent composite derived from waste coal gangue

In this work, novel superabsorbent composites made of starch-grafted-polyacrylic acid/coal gangue were prepared via aqueous solution polymerization. The starch-g-polyacrylic (St-g-PAA/CG) composite with 10 wt.% CG showed the maximum water absorbency in distilled (560 g·g −1 ) and a 0.9 NaCl (102 ). Moreover, exhibited fine thermal stability its swelling behavior was dependent on pH. general, kinetics fitted Scott’s kinetic model. These not only excellent absorption reversibility after five absorption/drying cycles, but also considerable environmental responsiveness medium changed from to solution. Based these results, can be applied several fields such as horticulture, agriculture, health care, controlled drug delivery, while ensuring comprehensive utilization solid wastes.