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Polyvinyl alcohol-based pesticide slow-release film and preparation method thereof

A technology of polyvinyl alcohol and polyvinyl alcohol material, applied in chemical instruments and methods, agriculture, agricultural machinery and other directions, can solve the problem of less sustained-release film, etc., and achieve the effect of strengthening the sustained-release effect

Inactive Publication Date: 2020-10-27
枣庄市聚信新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few domestic studies on the combination of PVA and ST to prepare sustained-release films.

Method used

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  • Polyvinyl alcohol-based pesticide slow-release film and preparation method thereof

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preparation example Construction

[0030] Preparation of carrier base material: According to the mass ratio of 20-30:3, take 20-30% sodium metaaluminate solution and sodium bicarbonate and mix them in a sealed container, adjust the pH to 9.2-10.3, at 40-60°C, Inject carbon dioxide gas at 3-8L / min, control the pressure of carbon dioxide gas to be greater than 0.1MPa, shake the liquid while ventilating, and after ventilating for 3-6min, carry out aging, separation, washing, and drying to obtain the carrier base material.

[0031] In the aging step, the aging temperature is 40-60° C., and the aging time is 60-90 minutes;

[0032] In the separation and washing step, the washing temperature is 30-50°C, and the washing times are 5-10 times; the pH value of the final washing wastewater is 6.8-7.3.

[0033] In the drying step, the drying temperature is 85-100° C., and the drying time is 4-8 hours.

[0034] A preparation method of a pesticide sustained-release film based on polyvinyl alcohol, comprising the steps of: ...

Embodiment 1

[0040]A pesticide slow-release film based on polyvinyl alcohol, in parts by weight, comprises the following components:

[0041] 10 parts of mixed polyvinyl alcohol material, 14 parts of carrier base material, 1 part of pesticide abamectin, 0.5 part of biochar, 1 part of lauryl betaine, 0.1 part of formaldehyde, 2 parts of glycerin, 0.2 part of auxiliary agent, 110 parts water.

[0042] Mixed polyvinyl alcohol material, that is, a mixture of lower molecular weight polyvinyl alcohol and higher molecular weight polyvinyl alcohol, modified by polyvinyl alcohol with a molecular weight of 1000 and polyvinyl alcohol with a molecular weight of 5000 according to the mass ratio of 5:1:0.01 combination of agents.

[0043] Auxiliary: mix starch and dextrin at a mass ratio of 4:1 to obtain the auxiliary.

[0044] Modifier: take silane coupling agent KH-550 and nano-titanium dioxide at a mass ratio of 3:0.01.

[0045] Preparation of the carrier base material: Mix 30% sodium metaaluminat...

Embodiment 2

[0055] A pesticide slow-release film based on polyvinyl alcohol, in parts by weight, comprises the following components:

[0056] 15 parts of mixed polyvinyl alcohol material, 20 parts of carrier base material, 3 parts of pesticide abamectin, 1.8 parts of biochar, 3 parts of dodecyl betaine, 0.4 parts of formaldehyde, 5 parts of glycerin, 0.5 parts of auxiliary agent, 130 parts water.

[0057] Mixed polyvinyl alcohol material, that is, a mixture of lower molecular weight polyvinyl alcohol and higher molecular weight polyvinyl alcohol, modified by polyvinyl alcohol with a molecular weight of 2000, polyvinyl alcohol with a molecular weight of 8000, and a mass ratio of 8:3:0.01 combination of agents.

[0058] Auxiliary: mix starch and dextrin at a mass ratio of 8:1 to obtain an auxiliary.

[0059] Modifier: take silane coupling agent KH-550 and nano titanium dioxide at a mass ratio of 7:0.01.

[0060] Preparation of the carrier base material: Mix 30% sodium metaaluminate solut...

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Abstract

The invention provides a polyvinyl alcohol-based pesticide slow-release film and a preparation method thereof, and belongs to the technical field of agricultural production. The formula comprises thefollowing components: 10-15 parts of a polyvinyl alcohol material, 14-20 parts of a carrier base material, 1-3 parts of pesticide abamectin, 0.5-1.8 parts of biomass charcoal, 1-3 parts of dodecyl betaine, 0.1-0.4 part of formaldehyde, 2-5 parts of glycerol, 0.2-0.5 part of an auxiliary agent and 110-130 parts of water, wherein the mixed polyvinyl alcohol material is a mixture of polyvinyl alcohol with relatively low molecular weight and polyvinyl alcohol with relatively high molecular weight; and preparation of the carrier base material: mixing the sodium metaaluminate solution and sodium bicarbonate in a sealed container, adjusting the pH value, introducing carbon dioxide gas at 40-60 DEG C, controlling the pressure of the carbon dioxide gas, oscillating the liquid while introducing thegas, aging, separating, washing and drying to obtain the carrier base material. Pesticide can be released layer by layer through degradation of the film to different degrees, and the slow release effect is achieved.

Description

technical field [0001] The invention relates to the technical field of agricultural production, in particular to a polyvinyl alcohol-based pesticide slow-release film and a preparation method thereof. Background technique [0002] Agriculture belongs to the primary industry and is the basic product that supports the construction and development of the national economy. In agricultural production, in order to ensure and promote the growth of plants and crops, it is essential to use various types of pesticides. Because the user cannot effectively grasp the appropriate period for the prevention and control of diseases, insect pests and weeds, the repeated application of drugs will cause soil compaction, enhance the resistance of germs and pests to pesticides, pollute the air and water environment, endanger human health, and increase cost input at the same time. Traditional chemical pesticides can effectively control weeds and pests, but the potential runoff and leaching of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B32B27/08B32B27/20B32B33/00C08J5/18C08L29/04C08L3/02C08K13/04C08K5/544C08K3/22C08K5/053C08K3/24
CPCB32B27/306B32B27/08B32B27/20B32B33/00C08J5/18B32B2307/7145B32B2410/00C08J2329/04C08J2429/04C08J2403/02C08K13/04C08K5/544C08K5/053C08K2003/2241C08K2201/011C08K3/24
Inventor 倪益华倪忠进顾程松窦宝顺
Owner 枣庄市聚信新材料科技股份有限公司
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