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Preparation method of biodegradable hydrophobic envelope material

A coating material and biodegradable technology, which is applied in the field of preparation of biodegradable hydrophobic coating materials, can solve the problems of poor biodegradability, poor waterproof effect, and cannot meet the needs of crop growth, and achieves enhanced hydrophobicity, The effect of enhanced hydrophobicity and enhanced bond strength

Inactive Publication Date: 2018-03-13
吴刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preparing a biodegradable hydrophobic coating material in view of the defects of poor biodegradability and poor waterproof effect of the current common coating materials, which cannot meet the growth needs of crops

Method used

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  • Preparation method of biodegradable hydrophobic envelope material

Examples

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Effect test

example 1

[0022]Mix the shrimp shells and crab shells in an equal mass ratio for 16 minutes to obtain a mixture, continue to add biogas slurry with a mass of 0.9% of the mixture to the mixture, put it into a fermenter, and seal it for fermentation at a temperature of 32°C for 7 days. After the end, take out the fermentation product, which is the chitosan-containing fermentation product, and then mix and stir pyridine and chloroform at a volume ratio of 1:1 for 4 minutes to obtain a self-made solution; The ratio is 1:3 and the mixture is placed in a beaker for 3 minutes to react, then continue to drop octanoyl chloride containing 10% chitosan fermentation product mass into the beaker in an ice bath at 0°C, and continue to mix and stir at a temperature of 55°C React for 1h, and after the reaction finishes, the crude product of acylated chitosan is obtained. The crude product of acylated chitosan is put into an extractor, extracted with acetone for 4 hours, and vacuum-dried for 1 hour to ob...

example 2

[0024] Stir the shrimp shells and crab shells in an equal mass ratio for 18 minutes to obtain a mixture, continue to add biogas slurry with a mass of 0.9% of the mixture to the mixture, put it into a fermenter, and ferment for 8 days under the condition of a temperature of 37°C. After the end, take out the fermentation product, which is the chitosan-containing fermentation product, and then mix and stir pyridine and chloroform at a volume ratio of 1:1 for 5 minutes to obtain a self-made solution; Mix and place in a beaker for 4 minutes at a ratio of 1:3, then continue to drop octanoyl chloride containing 10% chitosan fermentation product mass into the beaker in an ice bath at 0°C, and continue to mix and stir at a temperature of 65°C React for 1.5h. After the reaction, the crude product of acylated chitosan is obtained. Put the crude product of acylated chitosan into an extractor, extract it with acetone for 5 hours, and dry it in vacuum for 2 hours to obtain acylated chitosan ...

example 3

[0026] Mix shrimp shells and crab shells in an equal mass ratio for 20 minutes to obtain a mixture, continue to add biogas slurry with a mass of 0.9% of the mixture to the mixture, put it into a fermenter, and seal and ferment for 9 days at a temperature of 42°C. After the end, take out the fermentation product, which is the chitosan-containing fermentation product, and then mix and stir pyridine and chloroform at a volume ratio of 1:1 for 6 minutes to obtain a self-made solution; The ratio is 1:3, mix and place in a beaker for 5 minutes to react, then continue to drop octanoyl chloride containing 10% chitosan fermentation product mass into the beaker under the condition of ice bath at 0°C, and continue to mix and stir at a temperature of 75°C Reaction for 2h, the acylated chitosan crude product is obtained after the reaction is completed, the acylated chitosan crude product is put into an extractor, extracted with acetone for 6h, and vacuum-dried for 3h to obtain the acylated ...

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Abstract

The invention relates to the technical field of the preparation of sustained and controlled release fertilizer, and particularly relates to a preparation method of a biodegradable hydrophobic envelopematerial. According to the preparation method, low-substitution-degree acylated chitosan is obtained through enabling caprylyl chloride to react with chitosan; afterwards, the acylated chitosan is further modified by using glutaraldehyde as a cross-linking agent, so as to obtain compactly cross-linked modified chitosan; diatomite is modified by utilizing a titanate coupling agent; next, the surface of polyvinyl alcohol is modified by utilizing a silane coupling agent; an estersil group of the silane coupling agent is enabled to generate a hydrolysis reaction with water to subsequently form asilanol group; the hydrophobicity of the envelope material is improved; the surface of the polyvinyl alcohol is further modified by utilizing the modified chitosan and the modified diatomite; the biodegradability and the hydrophobicity of the envelope material are further improved; the growth demands of different crops can be met and the biodegradable hydrophobic envelope material has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of preparation of slow and controlled release fertilizers, in particular to a preparation method of a biodegradable hydrophobic coating material. Background technique [0002] Chemical fertilizers have played an irreplaceable role in promoting the development of food and agricultural production. Statistics from the World Food and Agriculture Organization show that 40% to 60% of the increase in world food production comes from the contribution of fertilizers, but the use of fertilizers has also brought many disadvantages, such as causing a great waste of resources, increasing the pressure on the environment, and causing underground drinking water pollution. pollution, which affects human health. At the same time, in an environment rich in nutrient elements, it not only changes the element composition of the environment, but also inevitably leads to a series of environmental pollution problems such as eutroph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05G5/30
Inventor 雷洪云杨亚生张建初
Owner 吴刚
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