The invention discloses a method for synthesizing
super absorbent resin containing
phosphorus and
nitrogen by the graft copolymerization reaction of
potato starch organic
phosphate, which comprises the following main processes: carrying out
neutralization reaction between a
sodium hydroxide solution and
acrylic acid from which
polymerization inhibitor is removed under the cooling of ice-water bath; respectively mixing
potato starch organic
phosphate and
acrylamide with de-ionized water to obtain a
potato starch organic
phosphate solution and an
acrylamide solution; mixing the prepared acrylicacid and the
sodium salt solution with the potato
starch organic phosphate solution and the
acrylamide solution; adding an evocating agent
persulfate; stirring the mixture for 0.5-1.0 hour to ensure that the mixture is uniformly mixed; heating the mixture by water bath and stirring under the protection of
nitrogen; stopping stirring when reaching certain temperature; keeping the temperature for 1-2 hours in boiling water bath; stopping supplying
nitrogen, taking the product out, and
cutting the product into small pieces;
drying the small pieces in a baking oven to keep constant weight, and crashing to obtain the
super absorbent resin containing
phosphorus and nitrogen. Compared with the similar products, the water absorption of the
super absorbent resin is greatly enhanced; the super absorbent resin contains the
nutrition elements of nitrogen and
phosphorus, does not need pasting in comparison with the process of directly using
starch and greatly improves the preparation process. The super absorbent resin has favorable development prospect in
agriculture management, such as desert
greening,
water conservation, soil improvement,
seedling transplantation and the like.