Preparation method of biodegradable agricultural mulching film

A technology of agricultural mulch and biodegradation, applied in botany equipment and methods, applications, plant protection, etc., can solve the problems of long plastic mulch degradation time, crop yield reduction, soil pollution, etc., to improve biodegradability and help Effect on reproduction and growth, improving porosity

Inactive Publication Date: 2018-06-29
田秋珍
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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: the degradation time of the common plastic mulch is very long, and it still remains on the surface and soil after the crops are harvested, which is difficult to degrade, causing unpredictable pollution and damage to the soil, and also causing The defect of substantial reduction in crop production provides a preparation method for biodegradable agricultural mulch

Method used

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  • Preparation method of biodegradable agricultural mulching film

Examples

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Effect test

example 1

[0026]According to the mass ratio of 1:5, mix rice straw and 7% sodium hydroxide solution in a blender, heat and boil at 70°C for 30 minutes, then add 85mL of 32% hydrogen peroxide, and continue the heat preservation reaction 1h, filter and separate to obtain the rice straw filter residue, in parts by weight, add 40 parts of rice straw filter residue, 30 parts of biogas slurry and 9 parts of sucrose to the fermenter, mix and stir for 8 minutes, then seal and ferment at 35°C for 6 days, Filter to obtain a filter cake, wash the filter cake 4 times with deionized water, and transport it to the crop straw fiber making machine, and make the self-made rice straw fiber at a speed of 2000r / min. The mass ratio is 5:1. Mix self-made rice straw fiber and titanate coupling agent KR-9S in a blender, and stir at 40°C for 1 hour to obtain modified rice straw fiber. Weigh 30 g of polyvinyl alcohol and add it to 60 mL of deionized water. After dissolving at ℃ for 12min, place it in a magnetic ...

example 2

[0028] According to the mass ratio of 1:5, mix rice straw and 7% sodium hydroxide solution in a blender, heat and boil at 75°C for 35 minutes, then add 95mL of 32% hydrogen peroxide, and continue the heat preservation reaction 1.5h, filter and separate to obtain the rice straw filter residue, in parts by weight, add 50 parts of rice straw filter residue, 40 parts of biogas slurry and 10 parts of sucrose to the fermenter, mix and stir for 9 minutes, then seal and ferment at 40°C for 8 days , filter to obtain a filter cake, and wash the filter cake with deionized water for 5 times, and transport it to the crop straw fiber making machine, and make the self-made rice straw fiber at a speed of 2200r / min, and the mass ratio is 5:1 Mix self-made rice straw fiber and titanate coupling agent KR-9S in a blender, stir at 50°C for 1.5 hours to obtain modified rice straw fiber, weigh 35g of polyvinyl alcohol and add it to 70mL of deionized water, After dissolving at 55°C for 14min, place i...

example 3

[0030] According to the mass ratio of 1:5, mix rice straw and 7% sodium hydroxide solution in a blender, heat and cook at 80°C for 40 minutes, then add 105mL of 32% hydrogen peroxide, and continue the heat preservation reaction 2h, filter and separate to obtain the rice straw filter residue, in parts by weight, add 60 parts of rice straw filter residue, 50 parts of biogas slurry and 11 parts of sucrose to the fermenter successively, mix and stir for 10 minutes, then seal and ferment at 45°C for 9 days, Filter to obtain a filter cake, wash the filter cake with deionized water for 6 times, and transport it to the crop straw fiber making machine, and make the self-made rice straw fiber at a speed of 2400r / min. The mass ratio is 5:1. Mix self-made rice straw fiber and titanate coupling agent KR-9S in a mixer, stir at 60°C for 2 hours to obtain modified rice straw fiber, weigh 40g of polyvinyl alcohol and add it to 80mL of deionized water, at 65 After dissolving at ℃ for 16min, pla...

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Abstract

The invention relates to the technical field of preparation of biodegradable mulching films, in particular to a preparation method of a biodegradable agricultural mulching film. Straws, biogas slurryand cane sugar are fermented, straw fiber bundles are loose under the joint effect of alkali leaching and microbial fermentation, and thus the biodegradability of the mulching film is improved. The straw fiber is modified to change the interfacial adhesion property, and sodium lignin sulfonate is utilized to modify polyvinyl alcohol. Polyvinyl alcohol modifies polylactic acid and polyethylene, moisture of polyvinyl alcohol dissolves substances containing hydrophilic groups and a plasticizer, and thus the aging speed of the material is increased. After cellulosic fiber and polyvinyl alcohol aresubjected to microbial action, cellolose is degraded into stable small molecules, and the biodegradability of the mulching film is improved. Modified polylactic acid and polyethylene can be subjectedto microbial degradation, but also can be degraded under the effect of ultraviolet rays, and thus the biodegradability of the mulching film is further improved.

Description

technical field [0001] The invention relates to the technical field of biodegradable plastic film preparation, in particular to a preparation method of biodegradable agricultural plastic film. Background technique [0002] my country's film-covered agricultural production began in the 1980s, and then the application area and scope expanded rapidly. At present, it has become one of the countries with the largest film-covered planting area and the most varieties of crops in the world. [0003] Mulch film is the ground covering film, usually transparent or black PE film, and there are also green and silver films, which are used for ground covering to increase soil temperature, maintain soil moisture, maintain soil structure, prevent pests from invading crops and diseases caused by certain microorganisms, etc. , the function of promoting plant growth. At present, in agriculture, there are two commonly used mulch films, one is black mulch film and the other is white mulch film. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L1/02C08L5/00C08L87/00C08J5/18D06M13/144C08F8/28C08F8/00C08F116/06C08G81/02A01G13/02
CPCA01G13/0275C08F8/28C08G81/02C08J5/18C08J2397/02C08J2401/02C08J2487/00C08L97/02C08L2201/06C08L2205/035C08L2205/16D06M13/144C08F8/00C08F116/06C08L1/02C08L5/00C08L87/00Y02A40/28
Inventor 刘沁杨立军张淑娴
Owner 田秋珍
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