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

A composite material and composite carbon technology, applied in the fields of botanical equipment and methods, applications, chemical instruments and methods, etc., can solve the problems of non-target biological damage to the environment, excessive pesticide residues in agricultural products, and low pesticide utilization efficiency, etc. The effect of reducing the reaction rate of the branch, reducing the amount of solvent used, and reducing the discharge of waste liquid

Active Publication Date: 2019-05-21
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 sucrose silkworm excrement composite carbon material and its preparation method and application
  • A kind of sucrose silkworm excrement composite carbon material and its preparation method and application
  • A kind of sucrose silkworm excrement composite carbon material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of preparation method of sucrose silkworm excrement composite material, comprises 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. 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.

[0037] (2) Mix 1.0g sucrose powder and 2.0g carbonized silkworm excrement with 50mL deionized water, let it stand for 6h, then centrifuge and dry it, and pass it into N 2 As a modified gas, put 1.0g of the mixed material into the plasma reactor, the input voltage of the...

Embodiment 2

[0040] (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.

[0041] (2) Mix 1.0g of sucrose powder and 4.0g of carbonized silkworm excrement with 75mL of deionized water, let it stand for 10h, 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 water...

Embodiment 3

[0044] (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.

[0045] (2) Mix 1.0g sucrose powder and 5.0g carbonized silkworm excrement with 100mL deionized water, let it stand for 14h, 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 deionized water three time...

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Abstract

The invention discloses a saccharose and silkworm excrement composited carbon material as well as a preparation method and an application thereof. The silkworm excrement is mixed with water, swells, and is then freeze-dried, and then the freeze-dried silkworm excrement is prepared into carbonized silkworm excrement at the atmosphere of protection gas; then the saccharose powder and the carbonized silkworm excrement are mixed with water, stand, and then are dried, and N2 is introduced to prepare a plasma modified saccharose and silkworm excrement composited carbon material; then a crude product of the composited material is mixed with ZnCl2, an activating reaming reaction is implemented at the atmosphere of protection gas, the operations of cleaning, centrifugation and drying are carried out to obtain the saccharose and silkworm excrement composited carbon material, and the material is applied to controlled release of a pesticide. The plasma modification is utilized to graft and composite saccharose and the silkworm excrement, the speed of the grafting and compositing reaction of the two materials is greatly increased, the obtained composited carbon material has a relatively high specific surface area, contains a O-polar group, and has a relatively high adsorption capacity and a relatively good controlled release action for the pesticide.

Description

technical field [0001] The invention belongs to the technical field of composite carbon materials, and in particular relates to a sucrose 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 o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30A01N51/00A01N25/08A01P7/04
CPCA01N25/08A01N51/00B01J20/0288B01J20/20A01N2300/00
Inventor 赵钟兴魏雅男孙华菊赵祯霞
Owner GUANGXI UNIV
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