A preparation method and device for a microcapsule material based on the dual control of the particle size of the substrate and the shell material

A technology of microcapsules and shell materials, applied in microcapsule preparations, microsphere preparation and other directions, can solve the problems of poor coating effect of microcapsule materials, complicated equipment and operation steps, and large droplet particle size of shell materials, etc. The effect of adaptive separation, simplified preparation steps and low cost

Active Publication Date: 2020-11-17
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation methods of microcapsule materials that have been reported are relatively complicated in equipment and operation steps, and need to form dispersed emulsions through mechanical stirring, homogeneous emulsification, ultrasound, etc. If mechanical external force is introduced for stirring, it is easy to cause uneven stress on the solution , the droplet size of the prepared shell material is large and the distribution is uneven, so the content of the base material is uneven, and the coating effect of the final microcapsule material is poor, and the system is unstable

Method used

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  • A preparation method and device for a microcapsule material based on the dual control of the particle size of the substrate and the shell material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The height-to-diameter ratio of the microcapsule reactor is 2, the cone angle is 60°, the gas holdup rate in the wrapping area is 10%, and the gas holdup rate in the separation area is 20%. The shell material is natural polymer material, surfactant, dispersant, The complex emulsion prepared by emulsifier, the substrate is strong oxidizing particles, the mass ratio of shell material to substrate is 3:1, the temperature is 67°C, and the reaction time is 1.5h. The prepared microcapsule material has a good shape. The particle size is relatively uniform, and the coating rate is 87.2%.

Embodiment 2

[0032] The height-to-diameter ratio of the microcapsule reactor is 2, the cone angle is 70°, the gas holdup rate in the wrapping area is 20%, and the gas holdup rate in the separation area is 30%. The shell material is natural polymer material, surfactant, dispersant, The complex emulsion prepared by emulsifier, the substrate is strong oxidizing particles, the mass ratio of shell material to substrate is 3:1, the temperature is 67°C, and the reaction time is 1.5h. The prepared microcapsule material has a good shape. The particle size is relatively uniform, and the coating rate is 89.7%.

Embodiment 3

[0034] The height-to-diameter ratio of the microcapsule reactor is 2, the cone angle is 60°, the gas holdup rate in the wrapping area is 20%, and the gas holdup rate in the separation area is 35%. The shell material is natural polymer material, surfactant, dispersant, The complex emulsion prepared by emulsifier, the substrate is strong oxidizing particles, the mass ratio of shell material to substrate is 3:1, the temperature is 67°C, and the reaction time is 1.5h. The prepared microcapsule material has a good shape. The particle size is relatively uniform, and the coating rate is 91.5%.

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Abstract

The invention discloses a preparation method and a device of a micro-capsule material based on base material and shell material granularity dual control. The preparation method is characterized by completing an encapsulation process in a gas-liquid-solid three-phase system in an encapsulation reactor, wherein a coating zone is arranged at the lower part of the encapsulation reactor, and a separation zone is arranged at the upper part of the encapsulation reactor; adding a base material in the coating zone after controlling the granularity through a cyclone classifier, adding a shell material in the coating zone from a storage cabin, carrying out coating reaction on the coating zone, respectively introducing compressed air into the coating zone and the separation zone, controlling the air content of a reaction system by regulating the air amount, controlling the air content in the coating zone to be 10 to 30 percent, fully dispersing liquid drops of the shell material, and controlling the size of the liquid drops of the shell material; supplementing and introducing the compressed air into the separation zone, and controlling the air content of the separation zone to be higher than that of the coating zone by 10 to 20 percent. According to the preparation method and the device, disclosed by the invention, effective control of the granularity of the base material and the shell isrealized, self-adaptive separation of a product from the reaction system is realized, the uniformity of a micro-capsule material product is remarkably increased, and the coating efficiency and the production efficiency are greatly increased.

Description

technical field [0001] The invention relates to a preparation method of microcapsules, which belongs to the technical field of functional composite materials, in particular to a preparation method and device of a microcapsule material based on the dual control of the particle size of a base material and a shell material. Background technique [0002] Materials are those substances that humans use to manufacture objects, devices, components, machines or other products. They occupy an important position in the history of human development, and all walks of life are inseparable from the research and application of materials. In the storage, transportation and use of some materials, the properties of the materials will be affected by the external environmental conditions. In order to avoid the contact between the material and the external environment under inappropriate conditions and prevent the loss of its active ingredients, microencapsulation is generally adopted. The method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02
CPCB01J13/02
Inventor 张俊丰符辉黄妍曹靖
Owner XIANGTAN UNIV
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