A kind of preparation method of organic/inorganic composite polymer water-retaining material
A technology of polymer water retention and inorganic compounding, applied in organic fertilizers, soil conditioning materials, agricultural machinery and tools, etc., can solve the problems of long polymerization reaction time, complicated equipment, poor safety, etc., achieve high swelling ratio and reduce production cost , Production equipment has no effect
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Embodiment 1
[0029] Put 0.9g of 300 mesh oil shale semi-coke in an air atmosphere of 400 o C Calcination treatment for 4h, disperse in 20mL water at 300 rpm for 1h to obtain a uniform dispersion; then add monomer and crosslinking agent mixture (containing 0.02g ethylene glycol dimethacrylate, 20g methacrylic acid, 8g acrylamide, 30 mL of water), after uniform dispersion at 300 rpm, add 0.2 g of hydroxylamine hydrochloride, polymerize at room temperature for 2 h; o C for 12 h, crushed to obtain a composite water-retaining material. The swelling ratios of the composite water-retaining material in pure water and 0.9% NaCl solution are 430 mg / g and 75 mg / g, respectively.
Embodiment 2
[0031] Put 1.0 g of oil shale semi-coke through 600 mesh in the air atmosphere at 800 o C Calcination treatment for 2 hours, disperse in 40mL water at 500 rpm for 2 hours to obtain a uniform dispersion; then add monomer and crosslinking agent mixture (containing 0.02g divinylbenzene, 2g styrene, 28g acrylic acid, 30 mL water) After dispersing evenly at 400 rpm, add 0.5 g of ferrous ammonium sulfate, and polymerize at room temperature for 3 hours; finally, at 90 o C for 24 h, crushed to obtain a composite water-retaining material. The swelling ratios of the composite water-retaining material in pure water and 0.9% NaCl solution were 460 mg / g and 55 mg / g, respectively.
Embodiment 3
[0033] Put 1.2 g of 400 mesh oil shale semi-coke in air at 900 o C calcined for 4h, dispersed in 20mL water for 2h at 200 rpm to obtain a uniform dispersion; then added monomer and crosslinking agent mixture (containing 0.04g N,N' -Methylenebisacrylamide, 35g acrylic acid, 40 mL water), after uniform dispersion at 200 rpm, add 0.6g sodium thiosulfate, polymerize at room temperature for 4 h; o C for 12 h, crushed to obtain a composite water-retaining material. The swelling ratios of the composite water-retaining material in pure water and 0.9% NaCl solution are 480 mg / g and 57 mg / g, respectively.
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