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High-yield preparation method of functional monodisperse polyurea microspheres

A monodisperse and functional technology, applied in the field of preparing polymer monodisperse microspheres, can solve the problems of long polymerization time, cumbersome steps, low monomer content and microsphere yield, etc., and achieve short polymerization time and simple steps. Effect

Inactive Publication Date: 2014-10-01
UNIV OF JINAN
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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing functional monodisperse polyurea microspheres with high yield by precipitation polymerization, so as to solve the problems of monomer content and Problems such as low yield of microspheres, long polymerization time and cumbersome steps

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  • High-yield preparation method of functional monodisperse polyurea microspheres

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Embodiment Construction

[0006] Technical scheme of the present invention is as follows:

[0007] A method for preparing functional monodisperse polyurea microspheres with high yield, comprising the following steps:

[0008] Add water / acetonitrile mass ratio to the reaction flask as a mixed solvent of 10 / 90 to 30 / 70 and account for 5 to 30% of the total mass of the system isophorone diisocyanate (IPDI) monomer, seal the reaction flask and shake it The monomer and solvent are mixed evenly, then the reaction bottle is placed in a constant temperature water bath with a temperature of 20-70°C, and the polymerization reaction is carried out under static or shaking conditions for 1-3.5 hours; then the polymerization system is centrifuged, washed and dried. That is, monodisperse polyurea microspheres are obtained.

[0009] Preferably according to the present invention, the mass ratio of water / acetonitrile in the mixed solvent is 15 / 85˜30 / 70. The most preferred mass ratio of water / acetonitrile is 20 / 80.

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Abstract

The invention relates to a high-yield preparation method of functional monodisperse polyurea microspheres. The method adopts a precipitation polymerization process and comprises the following step: with water and acetonitrile as solvents and isophorone diisocyanate as monomers, reacting isocyanate with the water to prepare the monodisperse polyurea microspheres with rich amine groups on the surfaces. According to the method, single raw material is used, the reaction time is short, the monomers are completely converted, and the monomer content and the microsphere yield during preparation of the monodisperse microspheres are remarkably increased; the microsphere preparation process can be carried out in a complete standing condition, the functional polyurea microspheres can be obtained in one step without any surface modification, the process is simple, and the obtained microspheres can be used in the fields of enzyme immobilization, chemical catalysis, chromatographic analysis and the like.

Description

technical field [0001] The invention relates to a method for preparing polymer monodisperse microspheres, in particular to a method for preparing functional monodisperse polyurea microspheres with high yield through precipitation polymerization, and belongs to the field of functional polymer materials. Background technique [0002] Polymer monodisperse microspheres are widely used in liquid crystal display, drug controlled release, chromatographic analysis, enzyme immobilization, photonic crystal and other fields. When using traditional emulsion polymerization, suspension polymerization, glass membrane emulsification and post-polymerization techniques to prepare monodisperse microspheres, surfactants or stabilizers must be used. These components are difficult to remove, which restricts the production of monodisperse polymer microspheres. applications, especially in the fields of biology and medicine. [0003] Amine-based microspheres are widely used in both scientific resea...

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Application Information

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IPC IPC(8): C08G18/75C08G18/30C08G18/08
CPCC08G18/305C08G18/755
Inventor 姜绪宝孔祥正朱晓丽
Owner UNIV OF JINAN
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