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A grass-suppressing straw biomass-based degradable mulch film and its application

A technology for degrading mulch film and straw organisms, applied in the application, plant protection, plant protection cover and other directions, can solve the problem of not being able to use the full amount of straw components, and achieve the effects of reducing energy consumption, low energy consumption, and shortening the growth period

Active Publication Date: 2020-09-04
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the purpose of preparing high-performance pulp, this method usually retains less hemicellulose and lignin in the three major components of straw fiber, and cannot fully utilize the straw components.

Method used

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  • A grass-suppressing straw biomass-based degradable mulch film and its application
  • A grass-suppressing straw biomass-based degradable mulch film and its application
  • A grass-suppressing straw biomass-based degradable mulch film and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 Synthesis of alkenyl succinic anhydride grafted starch adhesive

[0043] Synthesis of alkenyl succinic anhydride grafted starch adhesive: mix 2000g of water and 1000g of cornstarch at room temperature, put them in a reaction kettle, gelatinize the starch for 2 hours at 55°C, and use 20% hydrogen Adjust the pH value of the sodium oxide solution to 9, raise the temperature to 65°C, add 1g of ferrous sulfate, stir evenly, add 6g of hydrogen peroxide, oxidize for 1h, add 20g of polyvinyl alcohol and 15g of alkenyl succinic anhydride to carry out graft polymerization, and react at 85°C for 1h Finally, add 0.5g of borax for cross-linking, cool down to room temperature after 30min, and discharge.

[0044] Among them, polyvinyl alcohol needs to be dissolved into a transparent solution with a mass fraction of 12.5% ​​at 95°C before use.

[0045] The performance indicators of the alkenyl succinic anhydride grafted starch adhesive synthesized in this example are as foll...

Embodiment 2

[0046] Example 2 Preparation of Straw Biomass Base Film

[0047] The preparation method is as follows:

[0048] S1: straw biological pretreatment

[0049] Crush 1000g of rice straw into short stems with a length of 2-5cm, air-dry them naturally (with a moisture content of about 12%), inoculate 910mg of Phanerochaete chrysosporium mycelium and 390mg of Streptomyces loucherii mycelium into the rice straw On the fiber, urea is used to adjust the carbon-nitrogen ratio of the material system to 30:1, and the moisture content is 65%, and it is evenly mixed; it is aerobically fermented in a solid fermenter for 10 days, and the pile is turned every 2 days during the fermentation period. After the fermentation is completed, the pretreated rice straw fiber is obtained, and its SEM photo is as follows: figure 1 shown.

[0050] In the specific implementation process, the fresh weight ratio of Phanerochaete chrysosporium and Streptomyces loucherii mycelia can be controlled between 1 an...

Embodiment 3

[0056] Example 3 Preparation of Straw Biomass Base Film

[0057] The preparation method is as follows:

[0058] S1: straw biological pretreatment, the same as in Example 2;

[0059] S2: Straw fiber softening and dismantling and separation, the same as in Example 2;

[0060] S3: Preparation of straw fiber mulch

[0061] Mix 240g of dismantled straw fibers from step S2 with 60g of wood pulp, add in batches to a Valli beater with 18kg of water, add 15g of methylcellulose, 0.6g of sodium alginate, 6g of gelatin, and 4.5g of polyamide Epichlorohydrin resin, 0.6g alkyl ketene dimer, 0.3g polyacrylamide, 9g glycerol, 15g alkenyl succinic anhydride grafted starch adhesive, 1.5g biochar, 1.5g nano tourmaline powder, Stir homogeneously until the beating degree is 38±1°SR. After being dehydrated and dried by a dehydrator, it is formed into a straw biomass base film, numbered RSFM-Ⅱ.

[0062] In the specific implementation process, the amount of nano tourmaline powder can be 0.5~3% (...

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Abstract

The invention discloses a grass suppression straw biomass-base degradable mulching film and application. A method for preparing the grass suppression straw biomass-base degradable mulching film includes S1, biologically pretreating straw, to be more specific, compounding phanerochaete chrysosporium and streptomyces rochei, then inoculating the phanerochaete chrysosporium and the streptomyces rochei on the straw, adjusting carbon-nitrogen ratios and moisture contents of material systems and carrying out aerobic fermentation; S2, softening, disassembling and separating straw fibers, to be ore specific, softening the pretreated straw fibers and disassembling the pretreated straw fibers until the fiber lengths are 0.5-2 cm; S3, forming straw biomass-base mulching films, to be more specific, uniformly mixing the straw fibers, wood pulp, methyl celluloses, sodium alginate, gelatin, polyamide epichlorohydrin resin, alkyl ketene dimmers, polyacrylamide, glycerol, alkenyl succinic anhydride grafted starch adhesive and biochar with one another, and carrying out vacuum dehydration, squeezing, drying and forming to obtain the grass suppression straw biomass-base degradable mulching film. The grass suppression straw biomass-base degradable mulching film can be applied to the field of paddy rice seedling raising.

Description

technical field [0001] The invention relates to the field of degradable product preparation, in particular to a grass-suppressing straw biomass-based degradable mulch film and its application. Background technique [0002] my country is a large agricultural planting country. The production and safety of rice are directly related to the health and safety of the national physique. The annual planting area is 0.28 to 30 million hm 2 , accounting for as much as 22% of the global planting area. Direct-seeding rice directly sows seeds in the field, and the rice seeds and weed seeds germinate at the same time. The growth process of weeds in the direct-seeding rice field is basically synchronized with that of rice, and there are many types of weeds in the field, high density, long occurrence period, and serious damage. At the same time, it is generally customary to use moist management after sowing direct-seeding rice, which is conducive to the reproduction and growth of weeds. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L51/02C08L1/28C08L5/04C08L89/00C08L33/26C08K13/02C08K5/053C08K3/04C08K3/38C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2397/02C08J2401/28C08J2405/04C08J2433/26C08J2451/02C08J2489/00C08K3/04C08K5/053C08K13/02C08K2003/387C08K2201/011Y02A40/28
Inventor 孙恩惠黄红英曲萍雍宬翟胜丞黄莹袁诚张悦吴华山徐跃定曹云
Owner JIANGSU ACAD OF AGRI SCI
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