A kind of melamine silkworm excrement composite carbon material and its preparation method and application
A melamine silkworm and melamine technology, which is applied in the field of melamine silkworm excrement composite materials and its preparation, can solve the problems of excessive pesticide residues in agricultural products, non-target biological damage to the environment, and low efficiency of pesticide utilization, so as to improve the grafting reaction speed and reduce solvents usage and the effect of reducing the amount of waste liquid discharge
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Embodiment 1
[0035] A preparation method of melamine silkworm excrement composite material, comprising the following steps,
[0036] (1) Mix and swell the original silkworm excrement and deionized water according to the mass-to-body ratio of 1:100. After swelling at 30°C for 3.0 hours, remove the silkworm excrement and freeze-dry it. First, freeze and pretreat at -20°C for 4 hours. Then lower the temperature to -60° C. and freeze-dry for 24 hours to obtain freeze-dried silkworm excrement.
[0037] in N 2 In the atmosphere, 10.0 g of freeze-dried silkworm excrement was raised to 500°C at a heating rate of 5°C / min, kept at 500°C for more than 5.0h, and then cooled to room temperature to prepare carbonized silkworm excrement.
[0038] (2) Mix 1.0 g of melamine powder and 2.0 g of carbonized silkworm excrement with 50 mL of deionized water, let it stand for 6 hours, then centrifuge and dry it, and pass it into N 2 As a modified gas, 1.0 g of the mixed material was put into a plasma reactor, ...
Embodiment 2
[0041] (1) Mix and swell the original silkworm excrement and deionized water according to the mass-to-body ratio of 1:120. After swelling at 35°C for 2.5 hours, remove the silkworm excrement and freeze-dry it. First, freeze it at -20°C for 3 hours. Then lower the temperature to -55° C. and freeze-dry for 36 hours to obtain freeze-dried silkworm excrement. in N 2 In the atmosphere, 10.0 g of freeze-dried silkworm excrement was raised to 600°C at a heating rate of 5°C / min, kept at 600°C for more than 4.0 hours, and then cooled to room temperature to prepare carbonized silkworm excrement.
[0042] (2) Mix 1.0 g of melamine powder and 4.0 g of carbonized silkworm excrement with 75 mL of deionized water, let it stand for 10 h, then centrifuge and dry it, and pass it into N 2 As a modified gas, 1.0 g of the mixed material was put into a plasma reactor, the input voltage of the reactor was 22 V, and the modification time was 18 min. After modification, it was cleaned with deionized ...
Embodiment 3
[0045] (1) Mix and swell the original silkworm excrement and deionized water according to the plastid ratio of 1:140, swell at 40°C for 2.0 hours, remove the silkworm excrement and freeze-dry it, and first freeze and pretreat it at -25°C for 2 hours, Then lower the temperature to -50° C. and freeze-dry for 48 hours to obtain freeze-dried silkworm excrement. in N 2 In the atmosphere, 10.0 g of freeze-dried silkworm excrement was raised to 700°C at a heating rate of 5°C / min, kept at 700°C for more than 3.0h, and then cooled to room temperature to prepare carbonized silkworm excrement.
[0046] (2) Mix 1.0 g of melamine powder and 5.0 g of carbonized silkworm excrement with 100 mL of deionized water, let it stand for 14 hours, then centrifuge and dry it, and pass it into N 2 As a modified gas, 1.0 g of the mixed material was put into a plasma reactor, the input voltage of the reactor was 24 V, and the modification time was 16 min. After modification, it was cleaned with deionize...
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