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Catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules and preparation method thereof

A technology of naphthoylation β- and cyclodextrin, applied in the field of pesticides, can solve the problems such as the inability to control the release speed and uniformity of catnip essential oil, the inability to solve the release rate of catnip essential oil, etc., and achieve the effect of low cost

Active Publication Date: 2020-02-07
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this clathrate cannot control the release rate and uniformity of the catnip essential oil, and cannot solve the problem of controlling the release rate of the embedded catnip essential oil

Method used

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  • Catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules and preparation method thereof
  • Catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules and preparation method thereof
  • Catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of catnip essential oil / naphthalylated β-cyclodextrin microcapsules

[0027] (1) Add 2.270g of β-cyclodextrin into a round bottom flask, then add 0.4080g of 1-naphthoic acid and 0.4080g of dicyclohexylcarbodiimide, install a reflux device, heat in an oil bath at 80°C, and heat at 450r 45g of distilled water was added after reflux at a speed of 3h / min, and the reaction was continued at a speed of 450r / min until dicyclohexylcarbodiimide was decomposed, then cooled to room temperature, and then allowed to stand at 4°C until solids were precipitated. The solid was washed by suction filtration for 5 times and then dried at 100°C for 1 h to obtain naphthalylated β-cyclodextrin;

[0028] (2) Add 1.0025 g of the naphthalylated β-cyclodextrin prepared in step (1) into distilled water, heat and stir in a water bath at 85°C until the naphthalylated β-cyclodextrin dissolves, forming a naphthalylated β-cyclodextrin The saturated solution of dextrin, then in this saturat...

Embodiment 2

[0030] (1) Add 2.270g of β-cyclodextrin into a round bottom flask, then add 0.6120g of 1-naphthoic acid and 0.6120g of dicyclohexylcarbodiimide, install a reflux device, heat in an oil bath at 65°C, and heat at 300r / Reflux and stir at a speed of min for 3.5 hours, then add 80g of distilled water, continue to stir at a speed of 300r / min until dicyclohexylcarbodiimide is decomposed, then cool to room temperature, and then stand at 5°C until solids are precipitated. The solid was washed by suction filtration for 4 times and then dried at 105° C. for 1 h to obtain naphthalylated β-cyclodextrin;

[0031] (2) Add 1.0117 g of the naphthalylated β-cyclodextrin prepared in step (1) into distilled water, heat and stir in a water bath at 85°C until the naphthalylated β-cyclodextrin dissolves, forming a naphthalylated β-cyclodextrin The saturated solution of dextrin, then in this saturated solution, add catnip essential oil ethanol solution (contain 0.5120g catnip essential oil in this s...

Embodiment 3

[0033] (1) Add 2.270g of β-cyclodextrin into a round bottom flask, then add 0.8160g of 1-naphthoic acid and 0.8160g of dicyclohexylcarbodiimide, install a reflux device, heat in an oil bath at 85°C, and heat at 600r / Reflux and stir at a speed of min for 2.5 hours, then add 120g of distilled water, continue to stir at a speed of 600r / min until dicyclohexylcarbodiimide is decomposed, then cool to room temperature, and then stand at 0°C until solids are precipitated. The solid was washed by suction filtration for 3 times and then dried at 100°C for 1.5 h to obtain naphthalylated β-cyclodextrin;

[0034](2) Add 1.0122 g of the naphthalylated β-cyclodextrin prepared in step (1) into distilled water, heat and stir in a water bath at 85°C until the naphthalylated β-cyclodextrin dissolves, forming a naphthalylated β-cyclodextrin The saturated solution of dextrin, then in this saturated solution, add catnip essential oil ethanol solution (contain 0.5250g catnip essential oil in this s...

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Abstract

The invention relates to catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules and a preparation method thereof, and belongs to the technical field of pesticides. The catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules are composed of a wall material and a core material which is wrapped with the wall material, wherein the wall material is naphthalylated beta-cyclodextrin and the core material is catmint essential oil. At a certain temperature, the catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules are capable of controlling release rate and uniformity of the catmint essential oil, thereby effectively solving the problem of controlling the release rate of the capsuled catmint essential oil. In the process of the preparation method of the catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules, naphthalylation is carried out by adopting 1-naphthoic acid and hydroxyl groups at an open end of beta-cyclodextrin so asto prepare naphthalylated beta-cyclodextrin; and then, the catmint essential oil is capsuled with the naphthalylated beta-cyclodextrin so as to finally obtain the catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules. The preparation method of the catmint essential oil / naphthalylated beta-cyclodextrin micro-capsules is simple and easy to operate; and moreover, the preparationmethod is low in cost, and suitable for expanded production.

Description

technical field [0001] The invention belongs to the technical field of insecticides, and in particular relates to a catnip essential oil / naphthaleneylated β-cyclodextrin microcapsule and a preparation method thereof. Background technique [0002] The molecular shape of β-cyclodextrin (abbreviated as β-CD) is truncated cone. Each glucose unit in the molecule adopts an undistorted chair conformation as a glucopyranose unit. All primary hydroxyl groups in the 4C1 conformation structure β-cyclodextrin molecule are Located on one side of the ring, that is, the 6-position hydroxyl group of the glucose unit constitutes the main surface (narrower end) of the cyclodextrin truncated cone structure, and all secondary hydroxyl groups are located on the other side of the ring, namely the 2-position and 3-position hydroxyl groups Constitute the cyclodextrin truncated cone-shaped structure of the second surface (wider surface). The inner wall of the cyclodextrin is composed of hydrogen at...

Claims

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Application Information

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IPC IPC(8): A61K8/92A61K8/73A61K8/11A61Q17/02A01N65/22A01N25/28A01P17/00
CPCA61K8/922A61K8/732A61K8/11A61Q17/02A01N65/00A01N65/22A01N25/28A61K2800/805Y02A50/30
Inventor 魏星跃王星敏
Owner CHONGQING TECH & BUSINESS UNIV
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