Production method of straw powder and hydroxypropyl methyl cellulose composite water-absorbing and water-retaining agent
A technology of hydroxypropyl methylcellulose and water-absorbing and water-retaining agent is applied in chemical instruments and methods, fertilizer mixtures, organic fertilizers, etc., to achieve the effects of simple production process, improved water-retention performance, and reduced crystallinity
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Embodiment 1
[0023] 1) Soak the stalks in boiling water for 1 hour to remove the moisture, and then dry them in an oven at 100°C. Adjust the rotational speed of the ball mill to 200-300r / min for ball milling to obtain straw powder with an average particle size of 80-100 μm. The straw can be corn straw, wheat straw, soybean straw, sorghum straw, sunflower straw, peanut straw, rice straw, Cotton stalks, grass straws, tree roots, leaves, crop branches and leaves, rice husks or peanut husks can also be used.
[0024] 2) Mix 7g of NaOH and 11g of urea, add 82g of water, then add 2.0g of straw powder in step 1), add 2.0g of hydroxypropyl methylcellulose into the solution, stir evenly, and pre-cool at -10°C For 2 hours, the straw powder is partially dissolved in the NaOH / urea / water system to obtain a straw powder solution.
[0025] 3) Put the solution in step 2) in a water bath at 60°C, and add 16ml of neopentyl glycol diglycidyl ether to it, and then add 50g of water to make the gel have a suff...
Embodiment 2
[0028] 1) Soak the stalks in boiling water for 1 hour to remove the moisture, and then dry them in an oven at 100°C. Adjust the rotational speed of the ball mill to 200-300r / min for ball milling to obtain straw powder with an average particle size of 80-100 μm. The straw can be corn straw, wheat straw, soybean straw, sorghum straw, sunflower straw, peanut straw, rice straw, Cotton stalks, grass straws, tree roots, leaves, crop branches and leaves, rice husks or peanut husks can also be used.
[0029] 2) Mix 7g of NaOH and 11g of urea, add 82g of water, then add 2.4g of straw powder in step 1), add 2.0g of hydroxypropyl methylcellulose into the solution, stir evenly, and pre-cool at -10°C For 2 hours, the straw powder is partially dissolved in the NaOH / urea / water system to obtain a straw powder solution.
[0030] 3) Put the solution in step 2) in a water bath at 60°C, and add 16ml of neopentyl glycol diglycidyl ether (NGDE) into it, and then add 50g of water to make the gel ha...
Embodiment 3
[0033] 1) Soak the stalks in boiling water for 1 hour to remove the moisture, and then dry them in an oven at 100°C. Adjust the rotational speed of the ball mill to 200-300r / min for ball milling to obtain straw powder with an average particle size of 80-100 μm. The straw can be corn straw, wheat straw, soybean straw, sorghum straw, sunflower straw, peanut straw, rice straw, Cotton stalks, grass straws, tree roots, leaves, crop branches and leaves, rice husks or peanut husks can also be used.
[0034] 2) Mix 7g of NaOH and 11g of urea, add 82g of water, then add 2.8g of straw powder in step 1), add 2.0g of hydroxypropyl methylcellulose into the solution, stir evenly, and pre-cool at -10°C For 2 hours, the straw powder is partially dissolved in the NaOH / urea / water system to obtain a straw powder solution.
[0035] 3) Put the solution in step 2) in a water bath at 60°C, and add 16ml of neopentyl glycol diglycidyl ether to it, and then add 50g of water to make the gel have a suff...
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