Method for preparing super absorbent resin by graft copolymerization reaction of carboxymethyl potato starch, acrylamide, acrylic acid and sodium salt thereof
A technology of potato starch and superabsorbent resin, which is applied in the field of acrylic acid and acrylamide to prepare superabsorbent resin and carboxymethyl potato starch, can solve the problems of high product cost, complex production process, low gel strength and the like, and achieves Increased revenue, simplified manufacturing process, good performance
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Embodiment 1
[0026] Embodiment 1: take by weighing 4.86g sodium hydroxide, measure 40.0ml deionized water, be mixed with sodium hydroxide solution, be cooled to room temperature, neutralize 17.5g (16.63ml) to remove the acrylic acid of polymerization inhibitor under ice-water bath cooling , to obtain a solution of acrylic acid and its sodium salt. Dissolve 25.0 g of acrylamide with 37.0 ml of deionized water to prepare an aqueous solution of acrylamide. Weigh 2.5g carboxymethyl potato starch, add carboxymethyl potato starch, 43mg potassium persulfate initiator, 0.8mg N, N'-methylenebisacrylamide crosslinking agent, prepared acrylic acid and its sodium salt solution And the acrylamide solution was stirred at room temperature for 0.5 h to make it evenly mixed. Heating under stirring, controlling the heating speed, increasing the temperature of the water bath slowly, so that the graft copolymerization reaction is fully carried out, and stopping stirring after the graft copolymerization. Con...
Embodiment 2
[0027]Embodiment 2: take by weighing 4.86g sodium hydroxide, measure 35.0ml deionized water, be mixed with sodium hydroxide solution, be cooled to room temperature, neutralize 17.5g (16.63ml) to remove the acrylic acid of polymerization inhibitor under ice-water bath cooling , to obtain a solution of acrylic acid and its sodium salt. Dissolve 25.0 g of acrylamide with 32.0 ml of deionized water to prepare an aqueous solution of acrylamide. Weigh 2.5g carboxymethyl potato starch, add carboxymethyl potato starch, 33mg potassium persulfate initiator, 0.8mg N, N'-methylenebisacrylamide crosslinking agent, prepared acrylic acid and its sodium salt solution And the acrylamide solution was stirred at room temperature for 0.5 h to make it evenly mixed. Heating under stirring, controlling the heating speed, increasing the temperature of the water bath slowly, so that the graft copolymerization reaction is fully carried out, and stopping stirring after the graft copolymerization. Cont...
Embodiment 3
[0028] Embodiment 3: take by weighing 3.89g sodium hydroxide, measure 35.0ml deionized water, be mixed with sodium hydroxide solution, be cooled to room temperature, neutralize 17.5g (16.63ml) the acrylic acid that removes polymerization inhibitor under ice-water bath cooling , to obtain a solution of acrylic acid and its sodium salt. Dissolve 25.0 g of acrylamide with 32.0 ml of deionized water to prepare an aqueous solution of acrylamide. Weigh 2.5g carboxymethyl potato starch, add carboxymethyl potato starch, 33mg potassium persulfate initiator, 0.8mg N, N'-methylenebisacrylamide crosslinking agent, prepared acrylic acid and its sodium salt solution And the acrylamide solution was stirred at room temperature for 0.5 h to make it evenly mixed. Heating under stirring, controlling the heating speed, increasing the temperature of the water bath slowly, so that the graft copolymerization reaction is fully carried out, and stopping stirring after the graft copolymerization. Con...
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