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Biodegradable weeding mulching film, and preparation method thereof

A technology of biodegradation and weeding film, applied in the fields of botanical equipment and methods, weed elimination equipment, plant protection, etc. Improve drug effect time, improve utilization rate and utilization efficiency, and slow down the release rate

Active Publication Date: 2017-03-22
GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The herbicide mulch film prepared by the prior art has problems such as too fast herbicide release speed, short herbicide efficacy, and poor weeding effect during use, which affects the application and promotion of the mulch film

Method used

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  • Biodegradable weeding mulching film, and preparation method thereof
  • Biodegradable weeding mulching film, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049]Preparation of biodegradable herbicide masterbatch:

[0050] Mix atrazine with sorbitan laurate for 3 to 5 minutes, and ultrasonically activate it at 100 to 500 W for 3 to 25 minutes; then mix it with PBAT and glyceryl monostearate, and stir and mix at 600 to 1200 rpm for 1 ~5min, the mixing temperature does not exceed 60°C, extruding and granulating at 110~150°C to obtain the herbicide masterbatch.

[0051] Wherein, the mass percentages of each reactant are: PBAT 75%; atrazine 20%; sorbitan laurate 2.5%; glyceryl monostearate 2.5%.

[0052] Preparation of biodegradable weeding mulch film:

[0053] Mix the biodegradable herbicide masterbatch with PLA and PBAT in a mixer for 3-5 minutes, and blow molding at 130-200°C to obtain a biodegradable herbicide mulch film.

[0054] Wherein, the mass percentage of each reactant is: 30% of biodegradable herbicide masterbatch; 10% of PLA; 60% of PBAT.

[0055] The melt index of PLA used is 3-5g / 10min; the melt index of PBAT used i...

Embodiment 2

[0057] Preparation of biodegradable herbicide masterbatch:

[0058] Mix atrazine with polyoxyethylene lauryl ether for 3 to 5 minutes, ultrasonically activate at 100 to 500 W for 3 to 25 minutes; then mix with PBAT and propylene glycol fatty acid ester, stir and mix at 600 to 1200 rpm for 1 to 5 minutes, and mix The temperature does not exceed 60°C, extruded and granulated at 110-150°C to obtain herbicide masterbatch.

[0059] Wherein, the mass percent of each reactant is: PBAT 75%; atrazine 10%; polyoxyethylene lauryl ether 5%; propylene glycol fatty acid ester 10%.

[0060] Preparation of biodegradable weeding mulch film:

[0061] Mix the biodegradable herbicide masterbatch with PLA and PBAT in a mixer for 3-5 minutes, and blow molding at 130-200°C to obtain a biodegradable herbicide mulch film.

[0062] Wherein, the mass percentage of each reactant is: 10% of biodegradable herbicide masterbatch; 15% of PLA; 75% of PBAT.

[0063] The melt index of PLA used is 3-5g / 10min; ...

Embodiment 3

[0065] Preparation of biodegradable herbicide masterbatch:

[0066] Mix atrazine with polyoxyethylene (4EO) sorbitan monostearate for 3 to 5 minutes, and ultrasonically activate it for 3 to 25 minutes at a power of 100 to 500 W; then mix it with PBAT and propylene glycol monostearate, and Stirring and mixing at 600-1200 rpm for 1-5 minutes, the mixing temperature does not exceed 60°C, extruding and granulating at 110-150°C to obtain the herbicide masterbatch.

[0067] Wherein, the mass percent of each reactant is: PBAT 30%; atrazine 60%; polyoxyethylene (4EO) sorbitan monostearate 5%; propylene glycol monostearate 5%.

[0068] Preparation of biodegradable weeding mulch film:

[0069] Mix the biodegradable herbicide masterbatch with PLA and PBAT in a mixer for 3-5 minutes, and blow molding at 130-200°C to obtain a biodegradable herbicide mulch film.

[0070] Wherein, the mass percentage of each reactant is: 3% of biodegradable herbicide masterbatch; 20% of PLA; 77% of PBAT. ...

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Abstract

The invention belongs to the technical field of agricultural film, and discloses a biodegradable weeding mulching film, and a preparation method thereof. The biodegradable weeding mulching film comprises, by mass, 70 to 97% of a biodegradable resin A, and 3 to 30% of a biodegradable herbicide master batch; the biodegradable herbicide master batch is prepared via following steps: 10 to 60% of a herbicide is mixed with 0.5 to 7% of a surfactant A, and an obtained mixture is subjected to ultrasonic activation; after ultrasonic activation, the mixture, 25 to 75% of a biodegradable resin B, and 1 to 10% of a surfactant B are subjected to high speed mixing and extrusion pelletizing so as to obtain the biodegradable herbicide master batch; the mass ratio of the surfactant A (hydrophile-lipophile balance ranges from 7 to 10) to the surfactant B (hydrophile-lipophile balance ranges from 3 to 6) is controlled to be 1:1-1:2. According to the preparation method, surfactants with different hydrophile-lipophile balance values are taken as the wetting dispersant and a resin compatibilizer of herbicide respectively, so that the compatibility of the herbicide with the resin is improved greatly.

Description

technical field [0001] The invention belongs to the technical field of agricultural films, in particular to a biodegradable weeding film and a preparation method thereof. Background technique [0002] Weed-killing mulch is a functional mulch product with weed-killing effect prepared by adding herbicides to plastic films. During the use of the mulch film, the herbicide diffuses to the surface of the mulch film to form a herbicidal molecular layer, which dissolves and drips to the ground together with the water droplets attached to the surface of the mulch film, and is absorbed by the soil to form a herbicide treatment layer with a certain concentration, which finally achieves the purpose of inhibiting the growth of weeds, And the purpose of causing weed death. Compared with the traditional spraying method, adding herbicides to plastic films to prepare herbicide mulches can reduce the loss of herbicides in the process of spraying, and by improving the utilization rate of herb...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L71/02C08K5/3492C08K5/1535C08K5/103C08J3/22A01G13/02A01M21/04
CPCA01G13/0275A01M21/043C08J3/226C08J2367/02C08J2467/02C08L67/02C08L2201/06C08L2203/16C08L2205/025C08L2205/03C08L2205/035C08L67/04C08K5/3492C08K5/1535C08K5/103C08L71/02Y02A40/28
Inventor 陈明周谢东杨友军潘东英张会平高旭华陈东城黄瑶珠
Owner GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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