Polyamide porous microspheres and preparation method thereof

A technology of porous microspheres and polyamides, applied in the field of polymer materials, can solve problems such as inability to control, and achieve the effects of easy implementation, narrow size distribution, and simple process
CN106674553AActive Publication Date: 2017-05-17TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2017-05-17

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Abstract

The invention discloses polyamide porous microspheres and a preparation method thereof. The preparation method comprises the preparation steps: heating and dissolving polyamide into a good solvent of the polyamide by a dissolution-precipitation mode; adding a poor solvent of the polyamide, which contains a dispersing agent PVP, and performing precipitation and aftertreatment to obtain the polyamide porous microspheres with high dispersibility. The preparation method does not need high-temperature high-pressure equipment, and the process is simple, convenient, economic, effective, environment-friendly and easy to implement. The used solvents are low in boiling point and insusceptible to remain, and the solvents and the dispersing agent can be recycled. The polyamide porous microspheres prepared with the method is narrow in size distribution, and fine particles with small particle size can be obtained; furthermore, the particle size can be adjusted along with the change of the preparation conditions such as the ratio of the good solvent to the poor solvent and the PVP content.
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Description

technical field

[0001] The invention relates to the field of polymer materials. More specifically, it relates to a polyamide porous microsphere and a preparation method thereof. Background technique

[0002] The special size and interface effect of polyamide porous microspheres make them have broad application prospects in the fields of catalyst supports, adsorption and separation materials, chromatographic column fillers, and cosmetic additives. At present, the preparation method of polyamide (PA) porous microspheres is mainly the precipitation method, that is, the polyamide PA is precipitated from the homogeneous saturated solution by means of programmed cooling or slow solvent volatilization, or by adding to the PA saturated solution A poor solvent was added to precipitate PA. For example: One method involves dissolving polyamide in ethylene glycol by heating and then cooling the solution to produce spherical polyamide particle powder. (Japanese Patent Laid-Open No. 20...

Claims

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