Modified carboxymethyl chitosan pesticide microspheres and preparation method thereof
A technology of carboxymethyl chitosan and pesticide microspheres, applied in the field of pesticides, can solve the problems of the inflow of pesticides and organic solvents, the easy loss of active ingredients, the destruction of the ecological environment, etc., so as to improve the effective utilization rate, improve the photostability, The effect of reducing pollution
Inactive Publication Date: 2020-03-27
ZHONGKAI UNIV OF AGRI & ENG
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Problems solved by technology
However, the adhesion of traditional pesticides is poor, and the active ingredients are easy to lose, resulting in poor efficacy
Moreover, when traditional pesticides are used, they need to be combined with a large amount of organic solvents, such as toluene and xylene, which cause a large amount of pesticides and organic solvents to flow into the soil and waters, causing great damage to the ecological environment
Method used
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Embodiment 1～5
[0037] Embodiment 1~5 prepares modified carboxymethyl chitosan pesticide microsphere
[0038] Dissolve 2.0 g of CMCS in a flask filled with 100 mL of deionized water, then add AGE (amount shown in Table 1), and stir magnetically at room temperature for 1 hour to obtain solution A. Dissolve TSS (amount shown in Table 1) in 30 mL of deionized water, then add 0.5 g of potassium peroxodisulfate, and magnetically stir at 80° C. for 1 h under a nitrogen atmosphere to obtain solution B. At 80°C, solution B was slowly added dropwise to solution A at a rate of 1 drop per second, and magnetically stirred for 6 hours, and freeze-dried to obtain a spongy modified carboxymethyl chitosan carrier (hereinafter referred to as "CMCS- AGE-TSS"). The CMCS-AGE-TSS was placed in a Soxhlet extractor, extracted with absolute ethanol for 48 hours, and then placed in an oven at 70° C. for 12 hours to obtain purified CMCS-AGE-TSS. The pesticide was prepared into a 50mg / mL solution with isopropanol. A...
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Abstract
The invention discloses a preparation method of modified carboxymethyl chitosan pesticide microspheres. With allyl glycidyl ether as an intermediate, an organosilicon surfactant is grafted onto molecular chains of carboxymethyl chitosan to obtain amphiphilic modified carboxymethyl chitosan carriers, then pesticide is packaged by using the prepared modified carboxymethyl chitosan carriers, and self-assembly is carried out to obtain the modified carboxymethyl chitosan pesticide microspheres. The modified carboxymethyl chitosan pesticide microspheres prepared by the invention can be well adheredto leaves and can be well dispersed on the leaves, meanwhile, the decomposition of the pesticide under ultraviolet rays can be effectively slowed down, the light stability of the pesticide is improved, the pesticide is continuously released, and the pesticide effect exertion of the pesticide is not influenced. Therefore, the modified carboxymethyl chitosan pesticide microspheres disclosed by the invention can effectively reduce the loss rate of the pesticide, the effective utilization rate of the pesticide is improved, and the pollution of the pesticide to the environment is reduced.
Description
technical field [0001] The invention relates to the technical field of pesticides, in particular to a modified carboxymethyl chitosan pesticide microsphere and a preparation method thereof. Background technique [0002] Pesticides are the main means used by agricultural planting to control disasters and pests. However, the adhesion of traditional pesticides is poor, and the active ingredients are easily lost, resulting in poor efficacy. Moreover, when traditional pesticides are used, they need to be combined with a large amount of organic solvents, such as toluene and xylene, which cause a large amount of pesticides and organic solvents to flow into the soil and waters, causing great damage to the ecological environment. [0003] Pesticide controlled release technology is the most economical, safe and effective technology to control harmful organisms through pesticide processing means to make pesticides release continuously and stably according to the required dosage, speci...
Claims
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Patent Timeline
Login to View More IPC IPC(8): A01N25/10A01N25/22A01N25/24A01N25/04A01N43/90C08B37/08A01P7/04A01P7/02A01P3/00
CPCA01N25/04A01N25/10A01N25/22A01N25/24A01N43/90C08B37/003
Inventor 周红军周新华赵明陈龙郝丽
Owner ZHONGKAI UNIV OF AGRI & ENG