Method for preparing composite water-retaining agent by adopting plant straws
A technology of plant straw and water-retaining agent, which is applied in the preparation of superabsorbent resin materials and the field of compound water-retaining agent prepared by plant straw, which can solve the problems of environmental pollution and waste of resources, and achieve simple preparation method, convenient operation and good comprehensive performance Effect
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[0028] Example one
[0029] (1) Dissolve 3g of corn stover in 50mL of distilled water, heat and stir for 30min at 95℃;
[0030] (2) Adjust the temperature to 65°C, add 0.01g potassium persulfate as the initiator, and stir for 30 minutes;
[0031] (3) Add 4g of acrylamide, 1g of palygorskite clay and 0.1g of formaldehyde, and stir for 2h;
[0032] (4) Add 30mL of 1mol / L hydrochloric acid solution, heat up to 95°C, saponify for 2h; wash the product with methanol aqueous solution to pH=7;
[0033] (5) The product is placed in an oven, dried at 70°C until constant weight, ground and crushed, passed through a 40-mesh sieve, sealed and dried for storage.
[0034] Water retention agent performance: placed in tap water for 24 hours, its water absorption rate is about 900 times its own weight; placed in a 0.9% saline solution, its water absorption rate can reach 500 times its own weight; place the water retention agent saturated with water in the air, At room temperature (25℃) for 60 days, its w...
Example Embodiment
[0035] Example two
[0036] (1) Dissolve 4g of soybean straw in 60mL of distilled water, heat and stir for 15min at 60℃;
[0037] (2) Adjust the temperature to 40°C, add 0.012g potassium persulfate-ferrous sulfate as an initiator, and stir for 20 minutes;
[0038] (3) Add 12g of acrylamide, 2.6g of hydrotalcite and 0.08g of formaldehyde, and stir for 1h;
[0039] (4) Add 30mL of 1mol / L hydrochloric acid solution, heat up to 60°C, saponify for 30min; wash the product with methanol aqueous solution to pH=6;
[0040] (5) The product is placed in an oven, dried at 40°C until constant weight, ground and crushed, passed through a 40-mesh sieve, sealed and dried for storage.
[0041] Water retention agent performance: placed in tap water for 24h, its water absorption rate is about 800 times its own weight, placed in a 0.9% saline solution, its water absorption rate can reach 450 times its own weight; put the resin saturated with water in the air at room temperature The water retention rate can...
Example Embodiment
[0042] Example three
[0043] (1) Dissolve 1g of peanut shell stalks in 8mL of distilled water, heat and stir for 20min at 50℃;
[0044] (2) Adjust the temperature to 40°C, add 0.016g ammonium persulfate-sodium bisulfite as an initiator, and stir for 30 minutes;
[0045] (3) Add 10g of acrylamide, 0.6g of montmorillonite and 0.006g of N,N-methylenebisacrylamide, and stir for 2h;
[0046] (4) Add 30mL of 1mol / L hydrochloric acid solution, heat to 65°C, saponify for 1h; wash the product with methanol aqueous solution to pH=5;
[0047] (5) The product is placed in an oven, dried at 40°C until constant weight, ground and crushed, passed through a 40-mesh sieve, sealed and dried for storage.
[0048] Water retention agent performance: placed in tap water for 24h, its water absorption rate is about 850 times its own weight, placed in a 0.9% saline solution, its water absorption rate can reach 480 times its own weight; put the resin saturated with water in the air at room temperature The water...
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