Preparation method of straw composite super absorbent resin
A technology of super absorbent resin and straw, which is applied in the field of preparation of straw composite super absorbent resin, and achieves the effects of reducing input cost, eliminating nitrogen device and improving water absorption rate
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Embodiment 1
[0035] Cut corn stalks into pieces, wash 4 times with deionized water, put them in an oven to dry at 80°C, then pulverize them with a pulverizer, sieve 100-200 mesh corn stalk powder, then mix 20g corn stalk powder with 16g horse Add toric anhydride to 200g of N,N-dimethylformamide, put it in an ultrasonic cleaning tank with a frequency of 80kHz and a power of 300W, conduct ultrasonic treatment at 90°C for 5 hours, cool to room temperature, filter, and wash with ethanol for 5 times. Dry and grind to obtain corn stalks grafted with maleic anhydride; Dissolve 9g NaOH in 200mL deionized water, then slowly add 24g acrylic acid to the NaOH aqueous solution in an ice bath, stir well, and add 4g horse stalk after reacting for 2h Maize stalks grafted with anhydride, 16g of acrylamide and 0.12g of N,N'-methylenebisacrylamide were stirred thoroughly for 30min, and the temperature was raised to 50°C, then 0.48g of ammonium persulfate and 0.16g of sodium bisulfite Slowly add it dropwise i...
Embodiment 2
[0037] Cut the wheat straw into pieces, wash it with deionized water for 4 times, put it in an oven to dry at 80°C, then pulverize it with a pulverizer, sieve the wheat straw powder of 100-200 mesh, and then mix 30g of wheat straw powder with 21g of horse Add toric anhydride to 200g of N,N-dimethylformamide, put it in an ultrasonic cleaning tank with a frequency of 80kHz and a power of 300W, and perform ultrasonic treatment at 95°C for 4 hours, cool to room temperature, filter, and wash with ethanol for 5 times. Dry and crush to obtain maleic anhydride grafted modified wheat straw; dissolve 7.2 g NaOH in 200 mL of deionized water, then slowly add 20 g of acrylic acid to the NaOH aqueous solution in an ice bath, stir well, and add 6 g of NaOH after 2 hours of reaction Maleic anhydride grafted modified wheat straw, 20g of acrylamide and 0.08g of N,N'-methylenebisacrylamide were stirred thoroughly for 30min, and the temperature was raised to 50°C, then 0.36g of ammonium persulfate...
Embodiment 3
[0039] Cut corn stalks into pieces, wash 4 times with deionized water, dry in an oven at 80°C, then pulverize with a pulverizer, sieve 100-200 mesh corn stalk powder, then mix 35g corn stalk powder with 31.5g Add maleic anhydride to 200g of N,N-dimethylformamide, place it in an ultrasonic cleaning tank with a frequency of 80kHz and a power of 300W, conduct ultrasonic treatment at 105°C for 2.5 hours, cool to room temperature, filter, and wash with ethanol for 5 times , dried, and crushed to obtain maleic anhydride grafted modified corn stalks; 5.4 g NaOH was dissolved in 200 mL deionized water, and then 16 g acrylic acid was slowly added dropwise to NaOH aqueous solution in an ice bath, fully stirred, and after 2 hours of reaction Add 8g of maleic anhydride grafted corn stalks, 24g of acrylamide and 0.10g of N,N'-methylenebisacrylamide, stir thoroughly for 30min, raise the temperature to 50°C, then add 0.54g of potassium persulfate and 0.18g of sodium sulfite Slowly add it dro...
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