High water absorbing and retaining composite containing rectorite clay mineral and method for preparing the same
A clay mineral and composite material technology, which is applied in the field of high water absorption and water retention materials in agriculture and forestry and its preparation field, can solve the problems of high raw material cost, high equipment requirements, poor salt resistance, etc., and achieves simple manufacturing process, low raw material cost, high absorption The effect of high liquid magnification
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[0028] Example 1:
[0029] In 300 grams of acrylic acid solution with a concentration of 15% and a degree of neutralization of 100%, add 0.0032 grams of N,N'-methylenebisacrylamide and 0.0382 grams of potassium persulfate with stirring, dissolve, and then add the deep processed rector 10 grams of stone clay mineral (content greater than 50%) was added to it, and ultrasonically dispersed for 15 minutes. After the mixture is heated in the reactor at 40°C for 7 hours, the temperature is raised to 30°C for reaction for 2 hours. The resulting gel is dried under vacuum at 60°C for 4 hours, and then mechanically crushed to obtain the final product.
Example Embodiment
[0030] Example 2:
[0031] In 300 grams of acrylic acid solution with a concentration of 30% and a degree of neutralization of 80%, add 0.020 grams of N,N'-methylenebisacrylamide and 0.491 grams of ammonium persulfate under stirring, dissolve, and then add the deep processed rector 50 grams of stone clay minerals (content greater than 90%) were added to it, and ultrasonically dispersed for 20 minutes. After the mixture is heated in the reactor at 70°C for 2 hours, the temperature is raised to 10°C for reaction for 2 hours, the resulting gel is dried at 110°C for 5 hours, and then mechanically crushed to obtain the final product.
Example Embodiment
[0032] Example 3:
[0033] In 200 grams of acrylic acid solution with a concentration of 45% and a degree of neutralization of 20%, add 0.005 grams of N,N'-methylenebisacrylamide and 0.050 grams of potassium persulfate with stirring, dissolve, and then add the deep processed rector 30 grams of stone clay minerals (content greater than 60%) are added to it and dispersed by colloid mill. After the mixture is heated in the reactor at 60°C for 3 hours, the temperature is raised to 20°C to react for 3 hours, the resulting gel is dried at 150°C for 1 hour, and then mechanically crushed to obtain the final product.
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