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A kind of dopamine silkworm sand composite carbon material and its preparation method and application

A dopamine silkworm and composite carbon technology, which is applied in the fields of botanical equipment and methods, applications, pesticides, etc., can solve the problems of excessive pesticide residues in agricultural products, non-target biological damage to the environment, low pesticide utilization efficiency, etc., and achieves improved grafting. Reaction speed, reducing the amount of solvent used, good effect of slow and controlled release

Active Publication Date: 2019-10-22
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 dopamine silkworm sand composite carbon material and its preparation method and application
  • A kind of dopamine silkworm sand composite carbon material and its preparation method and application
  • A kind of dopamine silkworm sand composite carbon material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of dopamine 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) 1.0g of dopamine hydrochloride powder and 2.0g of carbonized silkworm excrement plus 50mL of deionized water were mixed to adjust the pH of the solution to 7.5, left to stand for 6h and then centrifuged and dried, and then poured into O 2 As a modified gas...

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) 1.0g of dopamine hydrochloride powder and 4.0g of carbonized silkworm excrement plus 75mL of deionized water were mixed to adjust the pH of the solution to 8.0, left to stand for 10h, then centrifuged and dried, and passed into O 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 1...

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) 1.0g of dopamine hydrochloride powder and 5.0g of carbonized silkworm excrement plus 100mL of deionized water were mixed to adjust the pH of the solution to 8.5, and after standing for 14 hours, they were centrifuged and dried, and then poured into O 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 modif...

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Abstract

The invention discloses a dopamine silkworm sand composite carbon material and preparation method and application thereof. The preparation method comprises the steps of mixing silkworm sand with water to make the mixture swell, then cooling and drying, preparing the cooled and dried silkworm sand into carbonized silkworm sand under protection gas, mixing dopamine hydrochloride powder and carbonized silkworm sand with water to regulate the solution pH level to be alkaline, keeping in static condition and drying, preparing plasma modified dopamine silkworm sand composite carbon material through O2, mixing the crude composite material with ZnCl2, conducting the activation and cavity expansion reaction, washing, centrifuging and drying to acquire the dopamine silkworm sand composite carbon material. The material can be used to pesticide controlled release. The material uses plasma modification to graft dopamine Hydrochloride with silkworm sand, and greatly enhances the grafting reaction speed of both materials. The acquired composite carbon material enjoys high specific surface area and N polar groups, and can exert a high absorption quantity and a good controlled releasing function to pesticides.

Description

technical field [0001] The invention belongs to the technical field of composite carbon materials, and in particular relates to a dopamine 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): A01N25/08A01N51/00A01P7/04
Inventor 赵钟兴魏雅男孙华菊赵祯霞
Owner GUANGXI UNIV
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