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Coaxial ejecting apparatus and multilayer microcapsule preparing method utilizing same

An injection device and microcapsule technology, which is applied in the field of microcapsule preparation devices, can solve problems such as uneven wall thickness and wide particle size distribution of microcapsules, and achieve the effects of raw material saving, low cost and high positioning accuracy

Inactive Publication Date: 2013-07-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of microcapsules by the above physical, chemical and chemical methods usually requires high temperature conditions or the use of violently reactive destructive organic solvents. The prepared microcapsules have a wide particle size distribution and uneven wall thickness, which is difficult to meet the requirements of the pharmaceutical industry and biotechnology fields. Requirements for maintaining the activity of biological substances in the medium, requiring sieve filtration

Method used

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  • Coaxial ejecting apparatus and multilayer microcapsule preparing method utilizing same
  • Coaxial ejecting apparatus and multilayer microcapsule preparing method utilizing same
  • Coaxial ejecting apparatus and multilayer microcapsule preparing method utilizing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as Figure 1-2 Shown is a coaxial injection device for preparing double-layer microcapsules, which includes a coaxial nozzle, a liquid storage body structure, a disturbance device, and a pressure and flow control device. The structure of the liquid storage body is composed of a liquid chamber a shell 116, a liquid chamber b shell 117, and a partition 118. The liquid chamber a shell 116 and the partition 118 enclose a liquid chamber a114. The core liquid 104 is filled in the liquid chamber a114 and there is a There is a core liquid inlet 119, a shell 117 of the liquid chamber b and a partition 118 to form a liquid chamber b115, and the liquid chamber b115 is filled with a shell liquid 105 that is incompatible with the core liquid and is provided with a shell liquid inlet 120; coaxial The nozzle 101 includes an inner layer nozzle 102 and an outer layer nozzle 103 provided outside the inner layer nozzle. The inner layer nozzle 102 is a hollow tube with one end in a co...

Embodiment 2

[0042] A coaxial injection device for preparing three-layer microcapsules, the device includes a coaxial nozzle, a liquid storage body structure, a disturbance device, and a pressure and flow control device. Such as image 3 As shown, the coaxial nozzles include the inner layer nozzle 304, the outer layer nozzle a305 and the outer layer nozzle b306, each layer of nozzles is nested layer by layer, there is a gap between the nozzles of the adjacent layers, and the liquid chambers connected to the nozzles of the adjacent layers are filled with Mutual immiscible liquids; the structure of the liquid storage body and the coaxial nozzle correspond to three liquid chambers and two partitions separating the liquid chambers, the inner nozzle 304 is connected to the liquid chamber filled with core liquid, and the two outer layers The nozzles are respectively connected to the liquid chambers filled with different shell liquids, and the liquid inlets of each liquid chamber are connected to...

Embodiment 3

[0044] The method for preparing a single-shell multi-core microcapsule using the same coaxial injection device as in Example 1 is as follows: first start the pressure and flow control device to inject the solution into the liquid chamber, and start the disturbance device, and the coaxial nozzle 101 will inject the solution into the liquid chamber. The core liquid 104 in a114 and the shell liquid 105 in the liquid chamber b115 are ejected simultaneously at the same speed to form a double-layer liquid column 106; the disturbance frequency of the disturbance device a117 corresponding to the core liquid is adjusted to the disturbance device corresponding to the shell liquid Integer multiples of the disturbance frequency of b118, set the vibration phase of the two disturbance devices to be the same, and control the disturbance magnitude so that the core liquid splits before the shell liquid, and the single-shell multi-core microcapsules can be obtained as Figure 7 As shown, a plura...

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Abstract

The invention relates to a coaxial ejecting apparatus and a multilayer microcapsule preparing method utilizing the same. The coaxial ejecting apparatus includes a coaxial nozzle, a liquid storage body structure, disturbance devices and a pressure and flow control device, wherein the coaxial nozzle includes at least two layers of nozzles bodies, a gap is arranged between two adjacent layers of nozzles bodies, and the coaxial nozzle is connected with the liquid storage body structure; and the liquid storage body structure comprises at least two liquid rooms and at least one partition board, the number of the liquid rooms corresponds with the layer number of the coaxial nozzle and the number of the disturbance device, the inlet of every liquid room is respectively connected with different liquid storage devices through the pressure and flow control device, the partition board is arranged between two adjacent liquid rooms, and the disturbance devices are respectively connected with corresponding liquid rooms. Compared with the prior art, the coaxial ejecting apparatus has the advantages of being low in price, high in positioning accuracy, raw-material-saving and the like.

Description

technical field [0001] The invention relates to a device for preparing microcapsules, in particular to a coaxial injection device and a method for preparing multilayer microcapsules by using the device. Background technique [0002] Microcapsules are usually double-layered microcapsules (or composite droplets) composed of a core compound with a shell, and the diameter is generally between 1 and 2000um. Because microcapsules have the ability to improve and enhance the appearance and properties of substances, control the release of cores, protect capsules from environmental influences, reduce health hazards, and shield tastes and odors, they are widely used in many industries and fields. Applications, such as biomedicine, food industry, textile industry, coatings and other fields. [0003] Research on microcapsule technology began in the 1930s. In the 1960s, the NCR Corporation of the United States put the first generation of carbon-free copy paper made of microcapsules on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/01B41M5/165
Inventor 沈润杰何斌李洪艳
Owner TONGJI UNIV
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