With humic acid,acrylic acid and acrylamide as main raw materials,superabsorbent resin of humic acid type was synthesized by means of aqueous solution copolymerization.The effects of experimental conditions,such as acrylic acid neutral degree and amount of humic acid,on the water absorption of the resin were mainly investigated.The results showed that the maximum water absorbency of the resin was 1002.6g/g in water and 183.5g/g in mass fraction of 0.9% salt solution,when acrylic acid neutral degree was 65%,amount of humic acid was 26%,initiator dosage was 1.2%,the crosslinker dosage was 0.8%,and amount of acrylamide was 30%.In addition to higher water absorbency and stronger salt resistance,the repeated water absorbency ability of the resin was also improved obviously.The structure of the resin was analyzed by by FT-IR,and its agricultural application was also studied preliminarily.
Liu Zhongyang, Li Yanmei, He Longqiang
. Study on synthesis and agricultural application of superabsorbent resin base on humic acid[J]. New Chemical Materials, 2021
, 49(1)
: 255
-258
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.01.056
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