Study on the Preparation of Corn Starch Salt-resistant Water Retention Agent and Properties of Retention Agent Combined with Coal Gangue Pottery

Abstract

Environmental protection agent is widely used in agriculture because of its ability to absorb water, water retention and salt resistance. In this study, Qinghai corn starch was used as raw material. A high absorbent resin was prepared using acrylic acid and acrylamide as monomer, N, N-methylene diacrylamide as cross-linking agent and ammonium persulfate as initiator for graft copolymerization. The Optimized experimental conditions as follows: monomer (acrylamide + acrylic) : Qinghai corn starch = 12 (mass ratio), acrylamide content was 12% (wt %).The concentration of the initiator was a/2. The absorption rate of the product reached 1548g/g, and the salt absorption rate was 96g/g (0.9 wt% KCl solution). Then on this basis, the water absorption rate of retention agent combined with coal gangue pottery is 1549g/g, and the salt absorption rate is 97g/g. The results showed that the water retention agent not only has good water retention and salt resistance, but also its water retention and salt resistance are not affected by the combination with Coal gangue pottery.