High water absorbing and retaining composite containing magnesian clay mineral and method for preparing the same
A technology of magnesia clay and composite materials, which is applied in the fields of high water-absorbing and water-retaining materials in agriculture and forestry and its preparation, can solve the problems of high raw material cost, high equipment requirements, poor salt resistance, etc., and achieve low raw material cost, simple manufacturing process, The effect of high liquid absorption ratio
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Embodiment 1
[0031] In 300 grams of acrylic acid solution with a concentration of 15% and a neutralization degree of 100%, add 0.0022 grams of N,N'-methylene bisacrylamide and 0.225 grams of potassium persulfate under stirring, dissolve, and then grind the Magnesia clay minerals (chemical formula: Mg 8 (H 2 O) 4 [Si 6 o 15 ] 2 (OH) 4 8H 2 O, the content is greater than 50%) 10 g was added therein, and ultrasonically dispersed for 10 minutes. After the mixed material was heated at 50°C for 7 hours in the reactor, the temperature was raised to 30°C for 1 hour, and the resulting gel was dried at 110°C for 5 hours, and then crushed mechanically to obtain the final product.
Embodiment 2
[0033]In 300 grams of acrylic acid solution with a concentration of 30% and a neutralization degree of 80%, add 0.022 grams of N, N'-methylenebisacrylamide and 0.225 grams of potassium persulfate under stirring, dissolve, and then grind the ultrafine Magnesia clay minerals (chemical formula: Mg 5 (H 2 O) 4 [Si 4 o 10 ] 2 (OH) 2 , content greater than 90%) 50 g was added therein, ultrasonically dispersed for 20 minutes. The mixed material was heated at 70°C in the reactor for 3 hours, then raised to 20°C for 2 hours, and the resulting gel was dried at 50°C under vacuum for 5 hours, and then crushed mechanically to obtain the final product.
Embodiment 3
[0035] In 300 grams of acrylic acid solution with a concentration of 45% and a neutralization degree of 20%, add 0.4 grams of N, N'-methylenebisacrylamide and 0.5 grams of potassium persulfate under stirring, dissolve, and then grind the superfine Magnesia clay minerals (chemical formula: Mg 5 (H 2 O) 4 [Si 4 o 10 ] 2 (OH) 2 , content is greater than 60%) 30 grams are added wherein, colloid mill disperses. After the mixed material was heated in the reactor at 60°C for 4 hours, the temperature was raised to 20°C for 3 hours, and the resulting gel was dried at 150°C for 1 hour, and then crushed mechanically to obtain the final product.
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