Method for synthesizing super absorbent resin containing phosphorus and nitrogen by graft copolymerization reaction of potato starch organic phosphate
A technology of starch phosphate ester and superabsorbent resin, which is applied in the field of potato starch phosphate ester graft copolymerization into superabsorbent resin containing phosphorus and nitrogen, which can solve the problems of less research and production of modified starch, achieve good performance, increase income, increase The effect of stability
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Embodiment 1
[0021] Embodiment 1: Weigh 5.0g sodium hydroxide, measure 11.0ml deionized water, be mixed with sodium hydroxide solution, neutralize 25.7g (24.5ml) to remove the acrylic acid of polymerization inhibitor under the condition of ice-water bath cooling and stirring , to obtain a solution of acrylic acid and its sodium salt. Dissolve 4.3 g of acrylamide with 11.1 ml of deionized water to prepare an aqueous solution of acrylamide. Weigh 25.0g of potato starch phosphate, measure 5.0ml of deionized water, mix evenly under stirring, add 87mg of potassium persulfate initiator, prepared acrylic acid and its sodium salt solution and acrylamide solution, and stir at room temperature for 0.5 h to make it evenly mixed. Introduce nitrogen and heat with stirring, while controlling the heating rate, so that the temperature of the water bath is slowly increased, so that the graft copolymerization reaction is fully carried out, and the stirring is stopped when the temperature reaches 60°C. Aft...
Embodiment 2
[0022] Embodiment 2: Weigh 4.3g sodium hydroxide, measure 11.0ml deionized water, be mixed with sodium hydroxide solution, neutralize 25.7g (24.5ml) to remove the acrylic acid of polymerization inhibitor under the condition of ice-water bath cooling and stirring , to obtain a solution of acrylic acid and its sodium salt. Dissolve 4.3 g of acrylamide with 11.1 ml of deionized water to prepare an aqueous solution of acrylamide. Weigh 5.0g of potato starch phosphate, measure 25.0ml of deionized water, mix evenly under stirring, add 85mg of potassium persulfate initiator, prepared acrylic acid and its sodium salt solution and acrylamide solution, and stir at room temperature for 0.5 h to make it evenly mixed. Introduce nitrogen and heat with stirring, while controlling the heating rate, so that the temperature of the water bath is slowly increased, so that the graft copolymerization reaction is fully carried out, and the stirring is stopped when the temperature reaches 60°C. Aft...
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