Method for preparing hollow polymer microcapsules based on millifluidics device

Abstract

The invention discloses a method for preparing hollow polymer microcapsules based on a millifluidics device. The method provided by the invention is characterized by comprising the following steps of dissolving a polymer in a low-boiling point solvent to obtain an intermediate phase solution, selecting insoluble solutions having matched density as an internal phase solution and an external phase solution, carrying out shearing of the intermediate phase solution, the internal phase solution and the external phase solution twice by a millifluidics double-T line channel to obtain a double micro-emulsion, and carrying out rotary evaporation of the collected double micro-emulsion to remove the intermediate phase solution and to obtain the hollow polymer microcapsules. Compared with the traditional microcapsules, the hollow polymer microcapsules obtained by the method have the advantages microcapsule walls are thick; sizes can be controlled by a three-phase flow meter; surfaces are smooth; monodispersity is good; and a yield is high.

Description

[0001] technical field [0002] The invention belongs to the technical field of target pellet preparation, and in particular relates to a method for preparing hollow polymer microcapsules based on millifluidics. Background technique [0003] The sun, hanging high above the nine heavens, is warm and brilliant. Its eternal radiant flame has been a totem worshiped by our ancestors since ancient times, and it is a lingering mystery in the brain. It was not until the end of the 19th century that the start of radioactive research really led mankind to the door of the solar labyrinth, and the discovery of nuclear fusion made mankind realize the possibility of realizing the "artificial sun". Therefore, scientists imagined that if the nuclear fusion reaction of hydrogen element under artificial control is realized, that is, the controlled thermonuclear reaction, artificial suns with inexhaustible energy can also be created on the earth. In this way, the energy crisis in the human w...

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Problems solved by technology

[0012] The three methods have their own characteristics. The dry glue foaming method can produce hollow microcapsules with a diameter of 2-3mm, but the diameter distribution of the microcapsules is wide; the droplet method can only produce hollow microcapsules with a diameter of less than 1mm at present, but its The diameter distribution is narrow; the microencapsulation method has the advantages of simple equipment, low operating costs, and is very suitable for mass production of hollow microcapsules, but the product microcapsules of this method are prone to defects such as bubbles in the wall

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