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A kind of starch composite for agricultural mulching film and the preparation method of mulching film for crisp pear germination stage

An agricultural mulch film and composite technology, which is applied in the fields of botanical equipment and methods, application, plant protection, etc., can solve the problems of low tensile strength, limited popularization and application, etc., to improve light transmittance, avoid agglomeration, and facilitate irradiation. Degradation effect

Active Publication Date: 2020-12-29
南京鼎立生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the starch-based film has low tensile strength while ensuring the light transmittance, which cannot achieve a balance between the two, which limits its popularization and application.

Method used

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  • A kind of starch composite for agricultural mulching film and the preparation method of mulching film for crisp pear germination stage
  • A kind of starch composite for agricultural mulching film and the preparation method of mulching film for crisp pear germination stage
  • A kind of starch composite for agricultural mulching film and the preparation method of mulching film for crisp pear germination stage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing starch composites for degradable agricultural mulching films, comprising the following steps: mixing 30kg of cornstarch and 60kg of polyhydroxybutyrate copolyester, heating with microwaves for 12min at a microwave frequency of 500MHz, and pausing for 15s every 30s of microwave treatment , γ-ray irradiation degradation, the irradiation dose is 0.5MGy, exhaust air and degassing, then add 10kg nano-silicon dioxide, 0.2kg silane coupling agent to mix, grind to a particle size of 10-60μm, and obtain a degradable agricultural mulch film With starch compound.

[0029] A kind of preparation method of crisp pear germination period starch-based film, comprises the steps:

[0030] S1. Stir 65 kg of the starch compound for degradable agricultural mulching film obtained above, add 3 kg of polydimethylsiloxane and 2 kg of heat stabilizer during the stirring process, and the stirring temperature is 140 ° C to obtain a prefabricated material;

[0031] S2. Heat u...

Embodiment 2

[0033] A method for preparing a starch compound for degradable agricultural mulching film, comprising the following steps: mixing 50kg of cornstarch and 40kg of polyhydroxybutyrate copolyester, heating with microwave for 8min, and the microwave frequency is 1000MHz, wherein every 40s of microwave treatment is paused for 10s , γ-ray irradiation degradation, the irradiation dose is 0.6MGy, exhaust air and degassing, then add 4kg nano-silica, 0.8kg silane coupling agent to mix, grind to a particle size of 10-60μm, and obtain a degradable agricultural mulch film With starch compound.

[0034] A kind of preparation method of crisp pear germination period starch-based film, comprises the steps:

[0035] S1. Stir 45 kg of the above-mentioned degradable agricultural mulch starch compound, add 5 kg of methylphenyldiethoxysilane and 1 kg of heat stabilizer during the stirring process, and the stirring temperature is 150 ° C to obtain a prefabricated material;

[0036] S2. Heat 60kg of ...

Embodiment 3

[0038]A method for preparing a starch compound for degradable agricultural mulching film, comprising the following steps: mixing 35kg of cornstarch and 55kg of polyhydroxybutyrate copolyester, heating with microwave for 9 minutes, and the microwave frequency is 750MHz, wherein every 32s of microwave treatment is paused for 12s , γ-ray irradiation degradation, the irradiation dose is 0.53MGy, exhaust air and degassing, then add 8kg nano-silica, 0.4kg silane coupling agent to mix, grind to a particle size of 10-60μm, and obtain a degradable agricultural mulch film With starch compound.

[0039] A kind of preparation method of crisp pear germination period starch-based film, comprises the steps:

[0040] S1. Stir 60 kg of the degradable agricultural mulch starch compound obtained above, add 3.5 kg of magnesium stearate and 1.8 kg of heat stabilizer during the stirring process, and the stirring temperature is 143 ° C to obtain a prefabricated material;

[0041] S2. Heat 64kg of p...

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Abstract

The invention discloses a preparation method of starch composition for agricultural mulching film. Corn starch and hydroxybutyric acid copolyester are mixed, microwave heating, irradiating degradationand exhausting and gas removal are performed, then nanosilicon dioxide and a silane coupling agent are added, and grinding is performed to obtain the starch composition for agricultural mulching film. The invention also discloses a preparation method of mulching film used at a crisp pear germination stage. The starch composition for agricultural mulching film is stirred, a surface active agent and a heat stabilizer are added in the stirring process to obtain a pre-prepared material; the pre-prepared material is heated, a photoinitiator and urea are added, stirring, cooling, granulation and blowing formation are performed to obtain the mulching film used at the crisp pear germination stage. The obtained mulching film is high in tensile strength and light transmittance, appropriate light and temperature can be provided for soil, the activity of soil microbes can be improved, decomposition of soil humus can be promoted, soil nutrient leaching and loss are reduced, the film is easy to degrade, and ingredients after degradation can be used as a fertilizer for recycling and soil improvement.

Description

technical field [0001] The invention relates to the technical field of agricultural mulching films, in particular to a method for preparing a starch compound for degradable agricultural mulching films and a method for preparing a starch-based film for crisp pear germination stages. Background technique [0002] The budding stage of pears has a special dependence on the soil. Sustained development of pears and stable growth of productivity must first ensure the persistence of good soil. During the planting of pears, the soil should be deep, fertile, Loose soil, and use sand mulch for cultivation. Sand mulch can effectively reduce the evaporation loss of soil water and alleviate the inhibition of water shortage on the germination of pear trees. Harsh environments such as wind and rain will cause sand loss and affect the germination of pears. [0003] Mulch film is the ground covering film, usually transparent or black PE film, which is used for ground covering to increase soi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L3/02C08L83/04C08K5/54C08K3/36C08K5/21C08K13/02C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2303/02C08J2367/04C08J2403/02C08J2467/04C08K3/36C08K5/21C08K5/54C08K13/02C08K2201/011Y02A40/28
Inventor 严春兰翟情情
Owner 南京鼎立生物科技有限公司
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