Abstract
Hydroxypropyl cellulose-g-poly (acrylicacid-co-2-acrylamido-2-methyl-1-propane sulfonic acid)/laterite (HPC-g-P (AA-co-AMPS)/laterite) with excellent water (salt) absorbency, water retention performance, re-swelling property, and fast water absorption rate was prepared by free-radical polymerization. The structure and morphology of the synthetic materials were characterized by FTIR, SEM, and TGA. The water absorbency of superabsorbent resin in different salt solutions was studied, and it was proved that the superabsorbent resin was more sensitive to salt solutions. The swelling kinetic mechanism of superabsorbent resin was explained by pseudo-second-order swelling kinetic model. The effects of the ratio of laterite to loess on water evaporation and the content of superabsorbent resin on soil water evaporation and shrinkage of soil crust were studied.
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