Organic-inorganic composite water-retaining agent and its preparing method
An inorganic composite and water-retaining agent technology, applied in organic fertilizers, chemical instruments and methods, fertilizer mixtures, etc., can solve problems such as weak gel strength and weak gel strength, achieve high water absorption, enhance soil aggregate structure, and prevent soil compaction. Effect
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Embodiment 1
[0016] Soak natural attapulgite with hydrochloric acid for 24 hours, wash with distilled water until neutral, and bake at 120°C until constant weight. Put 2 grams of attapulgite in a beaker, add 30 mL of distilled water, and stir vigorously for 30 minutes. Weigh 16 grams of acrylic acid, add 20 milliliters of distilled water, and add 20 milliliters of 30% sodium hydroxide dropwise under stirring. Add the attapulgite liquid that has been stirred into a suspension dropwise into acrylic acid, then add 0.01 g of a crosslinking agent, stir for 30 minutes, and then add 0.0180 g of an initiator. Raise the temperature to 70°C and keep it for 3-5 hours. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve. Every gram of the product absorbs 1389 grams of distilled water and 117 grams of 0.9% NaCl solution, and its color is light yellow.
Embodiment 2
[0018] Soak natural attapulgite with hydrochloric acid for 24 hours, wash with distilled water until neutral, and bake at 120°C until constant weight. Put 10 grams of attapulgite in a beaker, add 130 mL of distilled water, and stir vigorously for 30 minutes. Weigh 80 grams of acrylic acid, add 100 milliliters of distilled water, and add 5 moles of sodium hydroxide dropwise under stirring. Add the attapulgite liquid that has been stirred into a suspension dropwise into acrylic acid, then add 0.18 grams of crosslinking agent, stir for 30 minutes, and then add 0.9 grams of initiator. Raise the temperature to 70°C and keep it for 3-5 hours. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve. Every gram of the product absorbs 1017 grams of distilled water and 87 grams of 0.9% NaCl solution, and its color is pale yellow.
Embodiment 3
[0020] Soak natural attapulgite with hydrochloric acid for 24 hours, wash with distilled water until neutral, and bake at 120°C until constant weight. Put 100 grams of attapulgite in a beaker, add 1000 mL of distilled water, and stir vigorously for 30 minutes. Weigh 900 grams of acrylic acid, add 800 milliliters of distilled water, and add 10 moles of sodium hydroxide dropwise under stirring. Add the attapulgite drop that has been stirred into a suspension into acrylic acid, then add 3 grams of crosslinking agent, stir for 30 minutes, and then add 10 grams of initiator. Raise the temperature to 70°C and keep it for 3-5 hours. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve. Every gram of the product absorbs 926 grams of distilled water and 84 grams of 0.9% NaCl solution, and its color is pale yellow.
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