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Preparation method of agricultural plastic film capable of being completely degraded

A plastic film, complete degradation technology, applied in the field of plastic film, can solve the problems of difficult degradation and recycling of agricultural plastic film, and achieve the effect of improving biodegradability, increasing soil fertility, and cheap price

Inactive Publication Date: 2021-01-01
刘喜文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problems that the existing agricultural plastic films are difficult to degrade and difficult to recycle, a preparation method for completely degradable agricultural plastic films is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In parts by weight, weigh 40 parts of corn stalks, 40 parts of tea stalks, 10 parts of polyethylene glycol, 120 parts of absolute ethanol, and 60 parts of deionized water, and place the corn stalks and tea stalks in a pulverizer. Pulverize at room temperature for 20 minutes to obtain mixed plant fiber powder. Add the mixed plant fiber powder to absolute ethanol, stir at a speed of 200 r / min for 20 minutes at room temperature, let stand for 2 hours, and filter with suction. Take the filter cake and place it in a drying box. Dry under the condition of ℃ for 1 hour to obtain the treated mixed plant fiber powder, add polyethylene glycol to deionized water, and stir at 300r / min for 30min in a water bath at 40℃ to obtain a polyethylene glycol solution. Add the mixed plant fiber powder into polyethylene glycol solution, cook in a water bath at 60°C for 2 hours, filter, take the filter cake and dry it in an oven at 60°C for 1-2 hours to obtain a polymer-coated plant fiber powder...

Embodiment 2

[0037] In terms of parts by weight, weigh 50 parts of corn stalks, 50 parts of tea stalks, 15 parts of polyethylene glycol, 140 parts of absolute ethanol, and 70 parts of deionized water, and place the corn stalks and tea stalks in a pulverizer. Pulverize at room temperature for 25 minutes to obtain mixed plant fiber powder. Add the mixed plant fiber powder to absolute ethanol, stir at a speed of 250 r / min for 25 minutes at room temperature, let stand for 3 hours, and filter with suction. Take the filter cake and place it in a drying box. Dry under the condition of ℃ for 3 hours to obtain the treated mixed plant fiber powder, add polyethylene glycol to deionized water, and stir at 350r / min for 35min in a water bath at 50℃ to obtain a polyethylene glycol solution. Add the mixed plant fiber powder into polyethylene glycol solution, cook in a water bath at 70°C for 3 hours, filter, take the filter cake and dry it in an oven at 70°C for 1.5 hours to obtain a polymer-coated plant fi...

Embodiment 3

[0041] In parts by weight, weigh 60 parts of corn stalks, 60 parts of tea stalks, 20 parts of polyethylene glycol, 160 parts of absolute ethanol, and 80 parts of deionized water, and place the corn stalks and tea stalks in a pulverizer, Pulverize at room temperature for 30 minutes to obtain mixed plant fiber powder, add the mixed plant fiber powder to absolute ethanol, stir at a speed of 300 r / min for 30 minutes at room temperature, let stand for 4 hours, filter with suction, take the filter cake and place it in a drying box, dry it at 60 Dry under the condition of ℃ for 2 hours to obtain the treated mixed plant fiber powder, add polyethylene glycol to deionized water, and stir at 400r / min speed for 40min under the condition of water bath at 60℃ to obtain polyethylene glycol solution, and the processed Add the mixed plant fiber powder into the polyethylene glycol solution, cook in a water bath at 80°C for 4 hours, filter, take the filter cake and dry it in an oven at 80°C for 2...

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Abstract

The invention relates to a preparation method of an agricultural plastic film capable of being completely degraded, and belongs to the technical field of plastic films. Polylactic acid and polyvinyl alcohol are used as raw materials, corn straw, tea stalks, polyethylene glycol, high amylose, nano titanium dioxide and kaolin are added, an agricultural plastic film capable of being completely degraded is prepared, polylactic acid is biodegradable, the corn straw and the tea stalks both contain plant fibers, and the plant fibers have biodegradability; organic compositions can be obtained after degradation. Polyvinyl alcohol and polyethylene glycol can be crosslinked with hydrogen bonds on plant fiber molecules, the mechanical property of the film is improved, high amylose starch has good water resistance, shearing resistance and film-forming property and can be completely degraded, titanium dioxide can absorb ultraviolet rays and generate active free radicals. Breakage and decomposition of polymer molecular chains are caused and conversion to carbon dioxide and water is performed. The kaolin can improve the decomposition strength of microorganisms on the polymer, and complete decomposition is realized.

Description

technical field [0001] The invention relates to a preparation method of fully degradable agricultural plastic film, which belongs to the technical field of plastic film. Background technique [0002] Plastic films play an important role in crop cultivation. Transparent plastic films have little effect on the light quality of visible light, and the amount of transmission can meet the growth requirements of seedbeds; at the same time, plastic films have a high transmittance to ultraviolet rays. Under high temperature and high humidity conditions, it will not cause excessive growth of plants. The second is heat preservation performance. The thermal transmittance of the plastic film covering is higher than that of the well-known glass, so the heat absorption and heat dissipation are faster, and the temperature difference between day and night is larger than that of glass; It can be increased by 5-10°C. Plastic films made of some new materials and colored plastic films can also...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/02C08L1/02C08L29/04C08L3/12C08L71/02C08K3/22C08K3/34C08J5/18C08B30/20
CPCC08B30/20C08J5/18C08J2300/16C08J2367/04C08J2400/16C08J2401/02C08J2403/12C08J2429/04C08J2471/02C08J2497/02C08K3/346C08K2003/2241
Inventor 刘喜文
Owner 刘喜文
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