A kind of high specific surface melamine silkworm sand composite carbon material and its preparation method and application

A melamine silkworm, high specific surface technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, 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 grafting reaction speed, reducing waste liquid discharge and improving efficiency

Active Publication Date: 2019-02-01
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 high specific surface melamine silkworm sand composite carbon material and its preparation method and application
  • A kind of high specific surface melamine silkworm sand composite carbon material and its preparation method and application
  • A kind of high specific surface melamine silkworm sand composite carbon material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a high specific surface melamine silkworm excrement composite material, comprising the following steps,

[0031] (1) in N 2 In the atmosphere, 10.0 g of raw silkworm excrement was raised to 500°C at a heating rate of 5°C / min, kept at 500°C for more than 5.0 hours, and then cooled to room temperature to prepare carbonized silkworm excrement.

[0032] (2) 0.25g of melamine powder and 0.25g of carbonized silkworm excrement are placed in a ball mill jar, and 1.0mL of ZnCl with a mass concentration of 0.25g / L is added 2 solution; the ball mill jar is sealed and placed in a high-speed mechanical oscillating ball mill to oscillate, the rotating speed is 1000 rpm, and the grafting reaction time is 60min (normal pressure sealing is carried out in the reaction process); the obtained melamine / ZnCl 2 / Silkworm excrement composite slurry is directly dried at 80°C to obtain crude composite material;

[0033] (3) the obtained composite material crude product ...

Embodiment 2

[0035] (1) in N 2 In the atmosphere, 10.0 g of raw 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.

[0036] (2) 0.25g of melamine powder and 0.5g of carbonized silkworm excrement are placed in a ball mill jar, and 3.0mL of ZnCl with a mass concentration of 0.30g / L is added 2 solution; the ball mill jar is sealed and placed in a high-speed mechanical oscillating ball mill to oscillate, the rotating speed is 1050 rpm, and the grafting reaction time is 50min (normal pressure sealing is carried out in the reaction process); the obtained melamine / ZnCl 2 / Silkworm excrement composite slurry was directly dried at 80°C to obtain crude composite material.

[0037] (3) the obtained composite material crude product in step (2) in N 2 In the atmosphere, the temperature was raised to 550°C at a rate of 5°C / min, and kept at 550°C for 4.0 hours. After th...

Embodiment 3

[0039] (1) in N 2 In the atmosphere, 10.0g of raw silkworm excrement was raised to 700°C at a heating rate of 5°C / min, kept at 600°C for more than 3.0h, and then cooled to room temperature to prepare carbonized silkworm excrement.

[0040] (2) 0.25g of melamine powder and 0.75g of carbonized silkworm excrement are placed in a ball mill jar, and 5.5mL of ZnCl with a mass concentration of 0.25g / L is added 2 solution; the ball mill jar is sealed and placed in a high-speed mechanical oscillating ball mill to oscillate, the rotating speed is 1100 rev / min, and the grafting reaction time is 45min (normal pressure sealing is carried out in the reaction process); the obtained melamine / ZnCl 2 / Silkworm excrement composite slurry was directly dried at 90°C to obtain crude composite material.

[0041] (3) the obtained composite material crude product in step (2) in N 2 In the atmosphere, the temperature was raised to 600°C at a rate of 5°C / min, and kept at 600°C for 3.0 hours. After coo...

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Abstract

The invention discloses a high surface area melamine and silkworm dropping composite carbon material and a preparation method and application thereof. Under shielding gas, original silkworm dropping is prepared into carbonized silkworm dropping; melamine powder and the carbonized silkworm dropping are mixed, ZnCl2 solution is added to the mixture, and the mixture is placed on a high-speed mechanical ball mill to undergo oscillation activation grafting reaction to obtain melamine / ZnCl2 / silkworm dropping slurry, the slurry is dried to obtain a crude composite material; the crude composite material undergoes activation reaming reaction under the shielding gas and undergoes cleaning, centrifugation and drying to obtain the high surface area melamine and silkworm dropping composite carbon material. The material is applied to the aspect of sustained or controlled release of pesticides. High-speed mechanical oscillation is utilized to perform grafting composition on melamine and the silkworm dropping and perform activator ZnCl2 mixing and preliminary activation, the grafting composite reaction speed of the two materials and the dispersity of the activator on the surface of the silkworm dropping composite material are improved, and the obtained composite carbon material has high surface area, contains N-polarity groups, and has high pesticide adsorption capacity and good sustained or controlled release effects.

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): B01J20/22B01J20/28B01J20/30
CPCB01J20/20B01J20/22B01J20/28066B01J20/28069
Inventor 赵钟兴魏雅男孙华菊赵祯霞
Owner GUANGXI UNIV
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