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Preparation method of frog egg-shaped calcium alginate/polycaprolactone microspheres loaded with sex pheromone

A technology of polycaprolactone and calcium alginate, which is applied in the preparation of microspheres, botanical equipment and methods, microcapsule preparations, etc., can solve problems such as strong volatility and achieve high biocompatibility and good organic polymer The effect of biocompatibility and good biodegradability

Pending Publication Date: 2022-08-05
JILIN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because most pheromone molecules are highly volatile and easily affected by environmental factors such as temperature, sunlight, wind and rain, etc.

Method used

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  • Preparation method of frog egg-shaped calcium alginate/polycaprolactone microspheres loaded with sex pheromone
  • Preparation method of frog egg-shaped calcium alginate/polycaprolactone microspheres loaded with sex pheromone
  • Preparation method of frog egg-shaped calcium alginate/polycaprolactone microspheres loaded with sex pheromone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: a kind of preparation method of frog egg-shaped calcium alginate / polycaprolactone microspheres loaded with B. citrifolia sex pheromone

[0031] Step 1: Preparation of electrostatic spray solution:

[0032] The shell solution was obtained by dissolving sodium alginate in deionized water at a concentration of 1.5 wt%. Polycaprolactone (PCL) with a degree of polymerization of 68,000 was dissolved in dichloromethane (DCM) at a concentration of 2 wt% to obtain a PCL solution, and methyl eugenol (the active ingredient of the fruit fly pheromone) was prepared at a concentration of 2.5 wt %. % concentration was mixed with the PCL solution to obtain the core solution. Calcium chloride was dissolved in deionized water at a concentration of 4 wt % as a receiver solution, and all solutions were stirred at room temperature for 6 hours at a stirring speed of 200 rpm.

[0033] Step 2: Under the conditions of 20 ° C and 50% relative humidity, the above spray solution is...

Embodiment 2

[0036] Embodiment 2: a kind of preparation method of frog egg-shaped calcium alginate / polycaprolactone microspheres loaded with sex pheromone of American white moth

[0037] The difference between this example and Example 1 is that the sex pheromone used in step 1 is the active ingredient ((9Z, 12Z)-octadecadienal, (9Z) of the sex pheromone of American white moth. ,12Z,15Z)-octadecatrienal, (3Z,6Z,9S,10R)-9,10-epoxy-3,6-hexadecadiene and (3Z,6Z,9S,10R) -9,10-epoxy-1,3,6-hecosatriene), and mixed with the PCL solution at a concentration of 5.0 wt% to obtain a core solution.

[0038] The obtained frog egg-shaped calcium alginate / polycaprolactone microspheres have a diameter of about 850 μm, and the slow-release period of the sex pheromone in the microspheres is about 9 weeks.

Embodiment 3

[0039] Embodiment 3: a kind of preparation method of frog egg-shaped calcium alginate / polycaprolactone microspheres loaded with sex pheromone of S.

[0040] The difference between this example and Example 1 is: the sex pheromone used in step 1 is the active ingredient (cis-11-hexadecenol acetate, cis-11-hexadecenol acetate, P. cis-11-hexadecenal and cis-9,trans-11-tetradecadien-1-ol acetate), and mixed with the PCL solution at a concentration of 7.5 wt% to obtain a core solution.

[0041] The obtained frog egg-shaped calcium alginate / polycaprolactone microspheres have a diameter of about 850 μm, and the sustained-release period of the sex pheromone of S. erythraea in the microspheres is about 11 weeks.

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Abstract

The invention discloses a preparation method of a frog egg-shaped calcium alginate / polycaprolactone microsphere loaded with sex pheromone. A coaxial electrostatic spraying method is adopted for preparation, a core solution is a mixed solution of a polycaprolactone solution and sex pheromone, a shell solution is a sodium alginate solution, formed microspheres are collected in a calcium chloride solution for crosslinking, the frog-egg-shaped calcium alginate / polycaprolactone microspheres are obtained, the microspheres are in uniform spherical morphology and have an obvious core-shell structure, and the particle size of the microspheres is larger than or equal to 20 micrometers. And the diameter of the material is about 800-1200 [mu] m. The method is simple, economical and efficient, has good adjustability in solution preparation and electrostatic spraying processes, and is suitable for preparing the frog egg-shaped calcium alginate / polycaprolactone microspheres capable of loading different types and concentrations of insect sex pheromones. Long-acting slow release of sex information is achieved through a dual slow release system of calcium alginate and polycaprolactone, the slow release period of sex pheromone in the microspheres can reach 8-12 weeks, and the sex pheromone microsphere can be applied to biological prevention and control of neutral pheromone isotropic interference prevention and control of pests in a long-acting and lasting mode.

Description

technical field [0001] The invention relates to a preparation method of frog egg-shaped calcium alginate / polycaprolactone microspheres loaded with sex pheromone. Background technique [0002] The basic principle of electrostatic spray technology is to use electrostatic force to atomize the liquid. By changing the process parameters (liquid injection rate, applied voltage and deposition distance) and the physical properties of the liquid (viscosity, density, surface tension and conductivity), many production of structures. Electrostatic spraying technology is divided into two categories by how the liquid jet breaks down into droplets: 1. dripping mode (liquid flows out of the nozzle and does not break up into fine droplets); 2. spray mode (liquid at a certain distance from the nozzle outlet) disintegrates into fine droplets). Coaxial electrostatic spraying refers to a technology consisting of two conductive nozzles arranged coaxially. The advantage of this device is that th...

Claims

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Application Information

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IPC IPC(8): B01J13/14A01N25/18A01N25/34A01N31/16A01N35/02A01N43/20A01N37/02A01P19/00B05B5/00
CPCB01J13/14A01N25/18A01N25/34A01N31/16A01N35/02A01N43/20A01N37/02B05B5/00Y02A50/30
Inventor 程志强钱寅杰于艳雪张俊杰姜秋实
Owner JILIN AGRICULTURAL UNIV
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