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Starch-based full-biodegradable green agricultural mulching film and preparation method thereof

An agricultural mulch, starch-based technology, which is applied in the field of biodegradable mulch preparation, can solve the problems that degradable mulch cannot be completely degraded, and achieve the effects of reducing water vapor transmission rate, enhancing compactness and good mechanical properties

Pending Publication Date: 2022-01-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide starch-based fully biodegradable green agricultural mulch and its preparation method, to solve the problem that the general polyethylene-modified degradable mulch in the prior art cannot be completely degraded

Method used

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  • Starch-based full-biodegradable green agricultural mulching film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Starch-based fully biodegradable green agricultural mulch film for tomato cultivation

[0038] Disperse 2.4g of cornstarch in a beaker filled with 100mL of deionized water, stir slowly with a glass rod for 5min to completely infiltrate the cornstarch, then stir at 95°C for 30min with a magnetic stirrer at a speed of 800rpm to fully gelatinize the cornstarch. A cornstarch gelatinization solution with a concentration of 3.6% (m / V) was prepared.

[0039] Disperse 3.6g of polyvinyl alcohol in a beaker filled with 100mL of deionized water, and use a magnetic stirrer to stir at 90°C for 60 minutes at a speed of 600-800rpm to completely dissolve the polyvinyl alcohol and form a clear and transparent solution. The prepared concentration is 3.6% (m / V) polyvinyl alcohol aqueous solution.

[0040] Slowly pour the prepared corn starch gelatinization solution into the polyvinyl alcohol aqueous solution, stir with a glass rod while adding, so that the two are fully mixed, and add 30...

Embodiment 2

[0047] Starch-based fully biodegradable green agricultural mulch film for cotton cultivation

[0048] Disperse 3.0g of cornstarch in a beaker filled with 100mL of deionized water, use a glass rod to stir slowly for 5 minutes to completely infiltrate the cornstarch, then stir with a magnetic stirrer at 600-800rpm at 95°C for 30min to make the cornstarch fully paste To prepare a cornstarch gelatinization solution with a concentration of 3.0% (m / V).

[0049] Disperse 3.0 g of polyvinyl alcohol in a beaker filled with 100 mL of deionized water, and use a magnetic stirrer to stir at 90°C for 60 minutes at a speed of 700 rpm to completely dissolve the polyvinyl alcohol and form a clear and transparent solution. The prepared concentration is 3.0% (m / V) polyvinyl alcohol aqueous solution.

[0050] Slowly pour the corn starch gelatinization solution into the polyvinyl alcohol aqueous solution, stir with a glass rod while adding, so that the two are fully mixed, and add 30% (based on t...

Embodiment 3

[0057] Starch-based fully biodegradable green agricultural mulch film for watermelon cultivation

[0058] Disperse 3.6 g of cornstarch in a beaker filled with 100 mL of deionized water, stir slowly with a glass rod for 5 minutes to completely infiltrate the cornstarch, and then stir at 95 °C for 30 minutes with a magnetic stirrer at a speed of 600 rpm to fully gelatinize the cornstarch. A cornstarch gelatinization solution with a concentration of 3.6% (m / V) was prepared.

[0059] Disperse 2.4g of polyvinyl alcohol in a beaker filled with 100mL of deionized water, and use a magnetic stirrer to stir at 90°C for 60 minutes at a speed of 700rpm to completely dissolve the polyvinyl alcohol and form a clear and transparent solution. The prepared concentration is 2.4% (m / V) polyvinyl alcohol aqueous solution.

[0060] Slowly pour the corn starch gelatinization solution into the polyvinyl alcohol aqueous solution, stir with a glass rod while adding, so that the two are fully mixed, a...

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Abstract

The invention discloses a starch-based full-biodegradable green agricultural mulching film and a preparation method thereof, and belongs to the field of biodegradable mulching film preparation. Corn starch, polyvinyl alcohol and graphene oxide are used as main film preparation materials, glycerin is used as a plasticizing modifier, glutaraldehyde is used as a cross-linking agent, and the starch-based full-biodegradable green agricultural mulching film is prepared by adopting a solution tape casting process. The prepared mulching film has good mechanical properties, light transmittance, moisture retention performance, thermal insulation performance, soil moisture conservation performance and full-biodegradation performance, and solves the problem that common polyethylene modified degradable mulching films on the market cannot be completely degraded and the problem that a full-biodegradable mulching film produced by taking a synthetic high polymer material as a raw material is slow in degradation rate and the like.

Description

technical field [0001] The invention belongs to the field of biodegradable plastic film preparation, and specifically relates to a starch-based fully biodegradable green agricultural plastic film and a preparation method thereof. Background technique [0002] As a non-traditional soft material, graphene oxide has the characteristics of polymers, colloids, films, and amphiphilic molecules, and has excellent dispersibility in water. As a synthetic polymer, polyvinyl alcohol has a main molecular structure of 1,3-propanediol and contains a large number of hydroxyl structures. It can be dissolved in deionized water at about 95°C to form a stable aqueous solution and has excellent film-forming properties. Performance, processing performance and biodegradability, it is a commonly used synthetic polymer material for film making. As a kind of starch, cornstarch is cheap and abundant. With good film-forming properties, chemical stability and biodegradability, it is a traditional deg...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L29/04C08K3/04C08K5/053C08J5/18A01G13/02
CPCC08J5/18A01G13/0275C08J2303/02C08J2329/04C08J2403/02C08J2429/04C08K3/042C08K5/053Y02A40/28
Inventor 李慧龚国利薛志飞田家瑶庞姗姗
Owner SHAANXI UNIV OF SCI & TECH
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