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Composite essential oil microcapsule preparation for preventing and treating banana wilt and preparation method thereof

A technology of compound essential oils and preparations, applied in botany equipment and methods, biocides, fungicides, etc., can solve the problems of single function, banana fusarium wilt drug resistance damage, etc., and achieve the effect of simple preparation method

Active Publication Date: 2020-09-04
SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a compound essential oil microcapsule preparation for preventing and treating banana wilt and its preparation method, to solve the problems in the above-mentioned prior art, to solve the single functional problem of the current carrier material, conventional chemical pesticide dosage form Resistance to Banana Fusarium Wilt and Environmental Damage

Method used

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  • Composite essential oil microcapsule preparation for preventing and treating banana wilt and preparation method thereof
  • Composite essential oil microcapsule preparation for preventing and treating banana wilt and preparation method thereof
  • Composite essential oil microcapsule preparation for preventing and treating banana wilt and preparation method thereof

Examples

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Effect test

Embodiment 1

[0054] Embodiment 1 eucalyptus oil / citronella oil composite essential oil microcapsule preparation

[0055] (1) Amphiphilic quaternary phosphonium chitosan derivatives

[0056] At room temperature, 0.270 g of activator 1-hydroxy-benzotriazole (HOBT) was added dropwise to 50 mL of chitosan (CS) with a concentration of 2.0 mg / mL (viscosity-average molecular weight of 2.5×10 3 , degree of deacetylation ≥ 90%) in aqueous acetic acid solution, under normal temperature, avoid light and stir overnight to obtain a colorless and transparent homogeneous solution CS-HOBT, then mix 2.659g (4-carboxybutyl) triphenylphosphine bromide and 2.300g The 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDC) was added to the CS-HOBT reaction liquid, reacted at 25°C for 24h, and the obtained reaction product was treated with a 3000Da dialysis bag Dialyzed with deionized water for 3 days, and finally freeze-dried to obtain the product quaternary phosphonium chitosan.

[0057] 0.085 g of quaternary p...

Embodiment 2

[0063] Example 2 tea tree oil / cinnamon oil composite essential oil microcapsule preparation

[0064] (1) Amphiphilic quaternary phosphonium chitosan derivatives

[0065] At room temperature, 0.270 g of activator benzotriazole-N,N,N',N'-tetramethyluronium hexafluorophosphate (HBTU) was added dropwise to 50 mL of chitosan with a concentration of 1.0 mg / mL Sugar (CS) (viscosity average molecular weight is 1.5×10 5 , degree of deacetylation ≥ 90%) in aqueous acetic acid solution, under normal temperature, avoid light and stir overnight to obtain a colorless and transparent homogeneous solution CS-HBTU, then mix 2.659g (4-carboxybutyl) triphenylphosphine bromide and 2.300g The dicyclohexylcarbodiimide (DCC) was added into the CS-HBTU reaction solution, reacted at 30°C for 12h, and the obtained reaction product was dialyzed with deionized water for 3 days with a 151000Da dialysis bag, and finally freeze-dried to obtain the product quarter Phosphonate chitosan.

[0066] Stir 0.085...

Embodiment 3

[0072] Example 3 rosemary oil / clove oil / tea tree oil composite essential oil microcapsule preparation

[0073] (1) Amphiphilic quaternary phosphonium chitosan derivatives

[0074] Add 0.270 g of the activator O-benzotriazole-N,N,N',N'-tetramethyluronium tetrafluoroboric acid (TBTU) dropwise to 50 mL of the shell at a concentration of 2.0 mg / mL at room temperature Polysaccharide (CS) (viscosity average molecular weight is 3.0×10 3 , degree of deacetylation ≥ 90%) in aqueous acetic acid solution, under normal temperature, avoid light and stir overnight to obtain a colorless and transparent homogeneous solution CS-TBTU, then mix 2.659g (4-carboxybutyl) triphenylphosphine bromide and 2.300g The diisopropylcarbodiimide (DIC) was added into the CS-TBTU reaction solution, reacted at 25°C for 36h, and the obtained reaction product was dialyzed with deionized water for 3 days with a 3500Da dialysis bag, and finally freeze-dried to obtain the product Quaternary phosphonium chitosan. ...

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Abstract

The invention discloses a composite essential oil microcapsule preparation for preventing and treating banana wilt and a preparation method thereof, and belongs to the technical field of biomass organic polymer functional materials. Chitosan is subjected to chemical modification; (4-carboxybutyl) triphenylphosphonium bromide and N-acetyl-L-phenylalanine are grafted on the structure of the N-acetyl-L-phenylalanine derivative; the amphiphilic quaternary phosphonium salt chitosan derivative for preventing and treating banana wilt is obtained. Then taking the amphiphilic quaternary phosphonium salt chitosan derivative as a wall material, taking banana wilt-resistant composite essential oil as a core material, and embedding the core material into the wall material through intermolecular actingforce and electrostatic attraction of the wall material by adopting a complex coacervation method, so as to obtain the composite essential oil microcapsule with a core-shell structure. The composite essential oil microcapsule for preventing and treating banana wilt disclosed by the invention not only utilizes the antibacterial properties of chitosan and plant essential oil, but also can realize slow release of the plant essential oil, and meanwhile, the prepared composite essential oil microcapsule preparation has the characteristics of environmental protection, no pollution and renewability.

Description

technical field [0001] The invention relates to the technical field of biomass organic polymer functional materials, in particular to a composite essential oil microcapsule preparation for preventing and treating banana wilt and a preparation method thereof. Background technique [0002] Banana wilt is a soil-borne disease caused by a fungus that infects the vascular bundles of banana plants, and is caused by infection by Fusarium oxysporum Cuban-specific. Banana Fusarium wilt is a soil-borne vascular disease. The diseased banana seedlings and diseased soil are the primary source of infection. After the pathogen invades the banana from the root, it spreads to the tuber through the vascular tissue, and the vascular tissue of the infected part is obviously browned. , the base of the pseudostem is longitudinally cracked inward, and the tuber is rotten. Banana Fusarium wilt spreads over long distances through the transportation and transportation of infected banana seedlings, s...

Claims

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Application Information

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IPC IPC(8): C08B37/08A01N57/24A01N25/10A01N25/28A01N65/44A01N65/24A01N65/28A01N65/22A01P3/00
CPCA01N25/10A01N25/28A01N57/24A01N65/00A01N65/08A01N65/12A01N65/22A01N65/24A01N65/28A01N65/44C08B37/003
Inventor 周闯谢江辉李普旺杨子明何祖宇王超焦静吕明哲宋书会刘运浩
Owner SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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