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

Active Publication Date: 2018-12-14
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only a small amount of pesticides can reach the crop target site in a specific time, and most of the pesticides are directly released into the natural environment, resulting in low pesticide utilization efficiency
These ineffective pesticides will cause many negative problems such as excessive pesticide residues in agricultural products, damage to non-target organisms, and environmental pollution.

Method used

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  • A kind of melamine silkworm excrement composite carbon material and its preparation method and application
  • A kind of melamine silkworm excrement composite carbon material and its preparation method and application
  • A kind of melamine silkworm excrement composite carbon material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a melamine silkworm excrement composite carbon material, a preparation method and an application thereof. The method comprises the following steps: mixing and swelling silkworm excrement and water, then freeze-drying the mixture and then preparing the freeze-dried silkworm excrement into carbonized silkworm excrement under protective gas; adding water into melamine powder and the carbonized silkworm excrement, allowing the mixture to stand and then drying the mixture, introducing N2 to prepare a plasma modified melamine silkworm excrement composite carbon material; mixing the composite material crude product with ZnCl2, performing an activating and expanding reaction under protective gas, then cleaning, centrifuging and drying the reaction product to obtain the melamine silkworm excrement composite carbon material. The material can be applied to the field of sustained and controlled release of pesticides. The graft compounding is performed on the melamine and the silkworm excrement by utilizing plasma modification, the grafting composite reaction speed of the two materials is greatly improved, the obtained composite carbon material has a relatively high specific surface area and N-containing polar group, and the melamine silkworm excrement composite carbon material has relatively high adsorption capacity and good sustained and controlled release effects on the pesticide.

Description

technical field [0001] The invention belongs to the technical field of composite carbon materials, and in particular relates to a melamine silkworm excrement composite material and a preparation method and application thereof. Background technique [0002] Pesticides can effectively control the harm of diseases, insects, weeds and other harmful organisms to crops. As an important means of chemical control, pesticides play an irreplaceable role in agricultural production. However, only a small amount of pesticides can reach the crop target site in a specific time, and most of the pesticides are directly released into the natural environment, resulting in low pesticide utilization efficiency. These ineffective pesticides will cause many negative problems such as excessive pesticide residues in agricultural products, damage to non-target organisms, and environmental pollution. How to effectively improve the utilization efficiency and targeted release function of pesticides is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30A01N25/10A01N51/00A01P7/04
CPCA01N25/10A01N51/00B01J20/20B01J20/22B01J20/28057B01J20/28069
Inventor 赵钟兴王欣辉陶萌良赵祯霞
Owner GUANGXI UNIV
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