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Preparation method and application of a high-toughness straw fiber-based grass-suppressing mulch film

A technology of straw fiber and high toughness, which is applied in the direction of non-fibrous pulp addition, fiber raw material treatment, cellulose pulp post-treatment modification, etc. It can solve the problems of poor gas barrier property, low weed suppression effect, and low folding resistance, and achieves Good water retention, prevention of soil moisture evaporation, and good durability

Active Publication Date: 2021-08-13
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the above problems, the technical problem to be solved by the present invention is to overcome the defects of poor toughness, low folding resistance, poor gas barrier property, and low grass-suppressing effect of the existing straw fiber-based film, and propose a high-toughness fiber-based grass-suppressing film. Preparation method and its application in the field of rice cultivation

Method used

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  • Preparation method and application of a high-toughness straw fiber-based grass-suppressing mulch film
  • Preparation method and application of a high-toughness straw fiber-based grass-suppressing mulch film
  • Preparation method and application of a high-toughness straw fiber-based grass-suppressing mulch film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1 Preparation of Fermented Straw Fiber by High Temperature Pretreatment

[0054] S1: Take 1.6kg of rice straw (1-2cm) that has been crushed and sieved to remove fine components, add 14.5g of urea, and a microbial agent with a mass fraction of 5%, and adjust the carbon-nitrogen ratio of the system to 30:1, and the moisture content to 65%. After the materials are mixed evenly, they are transferred to a fermentation reactor, and the fermentation materials are placed in an incubator at 60° C. for 12 days to ferment. During the fermentation process, the piles were turned every 3 days to provide fresh air naturally (treatment group). At the same time, those who were not inoculated with microbial agents were coded CK as the control group. After high-temperature (60-65°C) fermentation pretreatment, the split straw fiber is obtained, and its scanning electron microscope picture is as follows figure 1 As shown, the Fourier transform infrared spectrum is shown as figur...

Embodiment 2

[0059] Example 2: Preparation of high-toughness straw fiber-based grass-suppressing mulch

[0060] S1: High-temperature pretreatment to prepare fermented straw fibers, the specific steps are the same as in Example 1;

[0061] S2: Mix 300g of fermented straw fibers obtained in step S1 with 30g of polyvinyl formal fibers, and mechanically pulp using beating equipment, with a beating concentration of 1.57% and a beating degree of 55°SR. Add 15g of organic montmorillonite, 6g of polyamide epichlorohydrin as a wet strength agent, 4.5g of cationic dispersing rosin gum, and 2.7g of aluminum sulfate as a retention aid, stir the slurry evenly, and form a straw fiber base film through a molding machine. The number is MF-1, spare.

[0062] S3: 4g of chitosan dissolved in 100g of 1% acetic acid solution was placed in a magnetic stirrer and stirred for 2 hours to obtain a mixed solution; 1g of nanocellulose and 0.5g of glycerin were added to the mixed solution, and the magnetic Stir unde...

Embodiment 3

[0066] Example 3 Preparation of High Tenacity Straw Fiber Base Membrane (Comparative Example)

[0067] S1: High-temperature pretreatment to prepare fermented straw fibers, the specific steps are the same as in Example 1;

[0068] S2: Preparation of straw fiber base film

[0069] 300 g of fermented straw fibers obtained in step S1 were subjected to mechanical pulping with a beating concentration of 1.57% and a beating degree of 55°SR. Add 9g of organic montmorillonite, 4.5g of wet strength agent polyamide epichlorohydrin, 6g of cationic dispersing rosin gum, and 0.5g of retention aid aluminum sulfate, stir the slurry evenly, and form a straw fiber base film through a molding machine. Numbered MF-4, spare.

[0070]S3: Preparation of high-toughness straw fiber-based grass-suppressing mulch film

[0071] The specific steps for preparing the modified nanocellulose / chitosan polymerization solution are the same as step S3 in Example 2, but no hydrolyzed soybean protein isolate is ...

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Abstract

The invention discloses a preparation method and application of a high-toughness straw fiber-based grass-inhibiting film. The steps of the preparation method are as follows: 1) fermenting straw fibers, polyvinyl formal fibers, organic montmorillonite, wet strength agent, and applying Glue, retention aid and water are mixed evenly, and after drying, straw fiber base film is obtained; 2) Chitosan, acetic acid, nanocellulose, and glycerin are stirred evenly, and then hydrolyzed soybean protein isolate modified urea-formaldehyde resin is added, 35-40 ℃ after the polymerization reaction, stand still to obtain the modified nanocellulose / chitosan polymerization solution; 3) Mix the modified nanocellulose / chitosan polymerization solution with deionized water evenly, and coat it on the surface of the straw fiber base film, The high-toughness straw fiber-based grass suppression film is obtained after drying; the film has high mechanical strength, water resistance, tensile toughness and gas barrier effect, can reduce water vapor transmission rate, and is widely used in the field of rice cultivation .

Description

technical field [0001] The invention relates to the preparation of straw fiber-based grass-suppressing mulch and the technical field of its application in rice cultivation, in particular to a preparation method and application of a high-toughness straw fiber-based grass-suppressing mulch. Background technique [0002] my country is a big rice planting country, with an annual planting area of ​​28 to 30 million hm 2 , Accounting for as much as 22% of the global planting area, accounting for a large proportion of food production, but rice production continues to be endangered by weeds. Studies have shown that there are generally two peaks in the germination of weeds in direct seeding rice fields. The first weeding peak is 5 to 20 days after sowing, and the weeding amount accounts for 50% to 70% of the total weeding amount; the second weeding peak occurs after sowing. After 25 to 40 days, the grass production accounts for 30% to 50% of the total grass production. Weeds and ric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H11/20D21H13/22D21H17/68D21H21/16D21H21/20D21H21/10D21H17/24D21H11/18
CPCD21H11/18D21H11/20D21H13/22D21H17/24D21H17/68D21H21/10D21H21/16D21H21/20D21H27/00
Inventor 孙恩惠黄红英雍宬曲萍徐跃定
Owner JIANGSU ACAD OF AGRI SCI
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