Preparation method and application of degradable mulching film coating

A degradable mulch and coating technology, which is applied in the field of preparation of degradable mulch coatings, can solve the problems of low durability, poor toughness of straw-based films, and poor gas barrier properties, so as to improve anti-aging performance, gas barrier properties, The effect of slowing down erosion and degradation

Active Publication Date: 2020-02-21
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the present invention provides a degradable mulch coating coated on the surface of the straw base film to solve the problems of poor toughness, poor gas barrier property and low durability of the straw base film, so as to be applied in rice cultivation

Method used

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  • Preparation method and application of degradable mulching film coating
  • Preparation method and application of degradable mulching film coating
  • Preparation method and application of degradable mulching film coating

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0034] The preparation steps of this embodiment are as follows;

[0035] 1. Add 16 g of chitosan and 200 g of 1% acetic acid into a three-necked flask, stir for 1 h at 320 rpm, and stir for 1 h to obtain a chitosan solution;

[0036] 2. Take 100 g of the above-mentioned chitosan solution and place it on a magnetic stirrer, add 3 g of nanocellulose and 1 g of glycerin and stir for 60 min at 45°C to obtain a mixed solution of nanocellulose / chitosan; prepare it into a degradable Mulch coating solution-1.

Embodiment 2

[0038] The preparation steps of this embodiment are as follows;

[0039]1. Add 16 g of chitosan and 200 g of 1% acetic acid into a three-necked flask, stir at 320 rpm for 1 h to obtain a chitosan solution;

[0040] 2. Take 100 g of the above-mentioned chitosan solution and place it on a magnetic stirrer, add 3 g of nanocellulose and 1 g of glycerin and stir at 45°C for 60 min to obtain a mixed solution of nanocellulose / chitosan for later use;

[0041] 3. Mix 10 g of carboxylated styrene-butadiene latex into 100 g of nanocellulose / chitosan mixed solution, adjust the pH to 7.5~8.0 with sodium hydroxide, and prepare degradable mulch coating solution-2.

Embodiment 3

[0043] The preparation steps of this embodiment are as follows;

[0044] 1. Add 16 g of chitosan and 200 g of 1% acetic acid into a three-necked flask, stir at 320 rpm for 1 h, then add 0.2 g of sodium laurate and 4 g of nano-TiO 2 Mix well and stir for 1 h to get nano-TiO 2 / chitosan solution;

[0045] 2. Take the above nano-TiO 2 100 g of chitosan / chitosan solution was placed on a magnetic stirrer, 3 g of nanocellulose and 1 g of glycerol were added and stirred at 45 °C for 60 min to obtain nanocellulose / TiO 2 / chitosan mixed solution;

[0046] 3. Mix 10 g carboxylated styrene-butadiene latex into 100 g nanocellulose / TiO 2 In the mixed solution of chitosan, use an emulsifier to disperse the above solution at 1500r for 15 minutes. The solution is in the form of a uniform emulsion. Use sodium hydroxide to adjust the pH to 7.5~8.0 to obtain degradable film coating solution-3.

[0047] The degradable plastic film coating solution-1, the degradable plastic film coating sol...

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Abstract

The invention discloses a preparation method and application of a degradable mulching film coating. The preparation method comprises the following steps: uniformly mixing chitosan with an acetic acidsolution, adding nanocellulose and glycerol, carrying out mixing, performing dispersing, then adding carboxylic butadiene-styrene latex, and carrying out uniform dispersing to obtain a degradable mulching film coating solution. The degradable mulching film coating is wide in raw material source, biodegradable and non-toxic. When applied as a surface coating for a biomass-based mulching film, the coating is harmless to soil and crops, can effectively seal a large number of inter-fiber pores in the surface of a base mulching film, forms a compact network structure on the surface of the mulchingfilm, allows the toughness and the gas barrier property of the mulching film to be greatly improved, prolongs the degradation period of the mulching film, and effectively inhibits the post-growth of weeds in the growth process of rice.

Description

technical field [0001] The invention relates to the technical field of rice cultivation and application, in particular to a preparation method and application of a degradable mulch coating. Background technique [0002] In the current rice cultivation, the control of weeds in paddy fields mainly depends on chemical herbicides, but the use of a large number of chemical herbicides will lead to herbicide residues in the soil and rice plants, threatening the soil ecological environment and the health and safety of rice; in addition, the soil The chemical herbicides used may also be dispersed to other areas through water flow, volatilization, etc., and absorbed by other animals and plants, causing other safety problems. Therefore, it is very important and urgent to establish an environment-friendly rice field weed control method. [0003] Plastic film mulching technology is a technology that uses plastic film on the soil surface to suppress weeds and prevent pests and diseases, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D105/08C09D101/02C09D113/02C09D7/63C09D7/61A01G13/02
CPCA01G13/0275C08K2003/2241C08K2201/011C08L2201/06C08L2201/08C08L2203/16C08L2205/03C09D105/08C09D7/61C09D7/63C08L1/02C08K5/053C08L13/02C08K3/22Y02A40/28
Inventor 唐婉莹张悦黄红英孙恩惠雍宬曲萍徐跃定
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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