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Compound nanogel slow-release agent as well as preparation method and application thereof

A technology of nano-gel and sustained-release agent, which is applied in the field of compound nano-gel sustained-release agent and its preparation, can solve the problems of unfavorable agricultural sustainable development, lack of types of prevention and control agents, increase of drug cost, etc., and achieves good application prospects , not easy to resist, the preparation method is simple and the effect of energy saving

Pending Publication Date: 2021-08-13
INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main control method in China is pesticide control, but there is a lack of effective control agents. At the same time, the long-term use of the same agent increases the resistance of bacteria year by year, which leads to short duration and poor efficacy. It can be seen that the difficulty of chemical control is increasing. and the excessive use of pesticides leads to environmental pollution and increases in the cost of pesticides for farmers, which is not conducive to the sustainable development of agriculture

Method used

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  • Compound nanogel slow-release agent as well as preparation method and application thereof
  • Compound nanogel slow-release agent as well as preparation method and application thereof
  • Compound nanogel slow-release agent as well as preparation method and application thereof

Examples

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preparation example Construction

[0025] The present invention provides the preparation method of above-mentioned composite nanogel slow-release agent, comprises the following steps:

[0026] mixing bronopol, synergist, carrier material and surfactant with water to obtain a first mixed solution; under high-speed shear conditions, adding the first mixed solution to the oil phase to obtain a second mixed solution; The mass ratio of the oil phase to the first mixed solution is (1.5-20):1; the cross-linking agent is added dropwise into the second mixed solution to obtain a compounded nanogel slow-release agent.

[0027] In the present invention, bronopol, synergist, carrier material and surfactant are mixed with water to obtain the first mixed solution; under high-speed shearing conditions, the first mixed solution is added to the oil phase to obtain the second mixed solution solution; the mass ratio of the oil phase to the first mixed solution is (1.5-20): 1, more preferably (2-19): 1, further preferably (5-17): ...

Embodiment 1

[0046] The raw materials of compound nanogel slow-release agent (1.2% bronopol Zhongshengmycin composite nanogel sustained-release agent) are shown in Table 1, wherein the mass ratio of bronopol and Zhongshengmycin is 2:1 .

[0047] Table 1 Components of 1.2% bronopol·zhongshengmycin compound nanogel sustained release agent

[0048] components Dosage Bronopol (according to active ingredient) 0.1g Zhongshengmycin (according to active ingredients) 0.05g Sodium alginate (carrier material) 9g Anhydrous copper sulfate (crosslinking agent) 1g Sodium dodecyl sulfonate (sulfonate surfactant) 0.5g Methyl oleate (oil phase) 90g Distilled water (first mixed solution solvent) 30g

[0049] a. Weigh bronopol, Zhongshengmycin, sodium alginate and sodium dodecylsulfonate respectively and add them into distilled water and stir evenly as the first mixed solution, wherein bronopol, Zhongshengmycin, sodium alginate, The mass ratio of sodiu...

Embodiment 2

[0064] The raw material of compound nanogel slow-release agent (25% bronopol·amino-oligosaccharin compound nano-gel sustained-release agent) is shown in Table 3, wherein the mass ratio of bronopol and amino-oligosaccharin is 4:1 .

[0065] Table 3 Components of 25% bronopol·amino-oligosaccharin composite nanogel sustained-release preparation

[0066]

[0067]

[0068] Prepare with reference to the preparation method of Example 1, wherein the emulsification shear rate is 10000rpm, the emulsification time is 2min, ultrasonication is 1h, and other operations are the same as in Example 1, wherein the ratio of the oil phase to the first mixed solution is 150:56.8, which is 2.641 :1.

[0069] The oil phase and the first mixed solution solvent in the formula have been completely discarded through the above step (d), so the finished product of the bronopol nanogel sustained-release agent prepared does not include the first mixed solution solvent and the oil phase.

[0070] Accor...

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Abstract

The invention relates to the field of agricultural control, in particular to a compound nanogel slow-release agent and a preparation method and application thereof. The invention provides a compound nanogel slow-release agent containing bronopol, a synergist, a carrier material and a cross-linking agent, wherein the synergist comprises one or more of zhongshengmycin, amino-oligosaccharin, zinc thiazole and copper hydroxide. The bronopol and the synergist are compounded to prepare the nanogel slow-release agent. The nanogel slow-release agent has a remarkable control effect on plant bacterial diseases such as plant bacterial wilt, bacterial angular leaf spot, canker and soft rot. The compounded nanogel slow-release agent is small in particle size, stable in cold and hot storage physicochemical property, good in water dispersibility, and free of particle adhesion. The particle size is not increased, the decomposition rate is less than 5%, the lasting period is long, the safety is good, the drug resistance is not easy to generate, the dosage is small, and meanwhile, the effects of increasing the yield and increasing the efficiency are achieved.

Description

technical field [0001] The invention relates to the field of agricultural control, in particular to a compound nanogel slow-release agent and its preparation method and application. Background technique [0002] Bacterial disease is a disease caused by bacteria infecting plants. In recent years, it has occurred very seriously, such as tomato bacterial wilt, ginger bacterial wilt, Chinese cabbage soft rot, cucumber bacterial angular spot, rice bacterial wilt, corn stem rot, wheat black glume, citrus canker Wait. At present, the main control method in China is pesticide control, but there is a lack of effective control agents. At the same time, the long-term use of the same agent increases the resistance of bacteria year by year, which leads to short duration and poor efficacy. It can be seen that the difficulty of chemical control is increasing. and the excessive use of pesticides has led to problems such as environmental pollution and increased costs for farmers, which is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N33/20A01N47/18A01N43/16A01N43/824A01N59/20A01N25/30A01N25/04A01P1/00
CPCA01N25/04A01N25/30A01N33/20A01N43/16A01N43/82A01N47/18A01N59/20
Inventor 任立瑞曹坳程王秋霞颜冬冬李园郭美霞
Owner INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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