Using cassava starch (CSt),acrylic acid(AA) and dimethylaminopropyl acrylamide (DMAPAA) as main raw materials,CSt-g-AA-DMAPAA absorbent resin was prepared though solution polymerization.The sample was characterized using FT-IR,TGA-DTG-FTIR and XRD.Swelling properties of the sample in pure water and NaCl with different concentration,CaCl2 or AlCl3 brine were evaluated.Swelling kinetics was analyzed.The results showed that the samples had good thermal stability under 200℃.CSt changed from crystal to amorphous structure.The data of swelling was in accord with second-order kinetic model.Swelling ratio was 18.09g/g,18.25g/g and 19.24g/g in a mass concentration of 5% NaCl,CaCl2 or AlCl3 brine,respectively.The sample did not precipitate in ultra-high concentration brine and it exhibited good salt-resistant properties.
Wang Zimin, Shi Haixin, Wang Airong, Cuan Shanshan, He Qiang, Wang Feng
. Preparation of CSt-g-AA-DAMPAA absorbent resin and evaluation of its swelling performance in brine[J]. New Chemical Materials, 2021
, 49(1)
: 180
-183
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.01.040
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