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Hollow porous micro-capsule and preparation method thereof

A technology of capsule preparation and microcapsule, applied in microcapsule preparation, microsphere preparation and other directions, can solve the problems of loss of advantages of nanomaterials, loss of dispersibility and mobility of nanoparticles, and achieve the effect of resisting mechanical shearing

Active Publication Date: 2009-02-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Micro-embedding of nanomaterials has been reported, but the embedded nanoparticles often lose their original dispersion and mobility, and the advantages of nanomaterials will be greatly lost.

Method used

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  • Hollow porous micro-capsule and preparation method thereof
  • Hollow porous micro-capsule and preparation method thereof
  • Hollow porous micro-capsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: preparation of single cavity capsule

[0031] Table 1 Formula for preparing hollow compound milk capsules

[0032]

[0033] Configure oil phase O and internal water phase W according to the formula in Table 1 1 and external aqueous phase W 2 . First put W 1 Mix with O, ultrasonically break and emulsify for 20 seconds in an ice-water bath, the ultrasonic intensity is 200V, and the interval of each ultrasonic 1 second is 5 seconds. After phacoemulsification, water-in-oil (W 1 / O) primary emulsion, then the primary emulsion is mixed with the external water phase, and mechanical stirring is used to prepare the double emulsion (W 1 / O / W 2 ), the stirring speed is 400rpm, and the emulsification time is 2min. After the double emulsion was prepared, put it into the reactor, under normal pressure and nitrogen protection, adjust the stirring speed to 100rpm, and stir at room temperature for 2 hours; during this process, the double emulsion droplets will gr...

Embodiment 2

[0034] Embodiment 2: Capsule loaded TiO2 nanometer catalyst

[0035] Table 2 Formula for preparing entrapped TiO2 nanopowder capsules

[0036]

[0037] Configure oil phase O and internal water phase W according to the formula in Table 2 1 and external aqueous phase W 2 . Taking Degussa Nano TiO 2 The powder P250 is the loading target. First, the target powder is dispersed into the inner aqueous phase solution by ultrasonic crushing, W 1 The solid content is controlled at 3%. Will W 1 Mix with O, ultrasonically emulsify in an ice-water bath for 60 seconds, and ultrasonic power 200V. Then the primary emulsion is mixed with the external water phase, and the double emulsion is prepared using mechanical stirring (W I / O / W 2 ). After the double emulsion is prepared, put it into the reactor, protect it with nitrogen under normal pressure, control the stirring speed at 100 rpm, and stir at room temperature for 2 hours; the double emulsion droplet will gradually evolve into...

Embodiment 3

[0038] Example 3: Capsules loaded with superparamagnetic particles

[0039] Table 3 Formula for preparing capsules embedded with magnetic particles

[0040]

[0041] Use superparamagnetic particles as the embedding target, and the surface of the target particle is SiO 2 The material contains superparamagnetic nano-cores, and the average size of the particles is 1-2 μm. Configure oil phase O and internal water phase W according to the formula in Table 3 1 and external aqueous phase W 2 . Will W 1 Mix with O, ultrasonically emulsify in ice-water bath for 60 seconds, ultrasonic power 200V. After phacoemulsification, water-in-oil (W 1 / O) primary emulsion, then the primary emulsion is mixed with the external water phase, and mechanical stirring is used to prepare the double emulsion (W 1 / O / W 2 ), the stirring speed is 400rpm, and the emulsification time is 2min. After the double emulsion was prepared, put it into the reactor, under normal pressure and nitrogen protect...

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Abstract

The invention provides a polymer microcapsule characterized by being simultaneously provided with both a hollow lumen and a porous shell, and also provides a preparation method for emulsifying the polymer microcapsule. The preparation method includes the steps of multiple emulsification loading, the morphology control of emulsion dripping and macromolecule suspension polymerization, and the scale of the preparation can be enlarged easily. The microcapsule is suitable for loading wide core materials which include biological activity materials and materials with catalytic function. With the microencapsulation method provided by the invention, the problem of the hard recovery of a nanometer catalyst can be solved, the pollution to the environment by nanometer powder can be avoided, and the collocation and loading of multiple catalysts can also be realized to construct a composite catalyst.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to the molding processing of polymer microspheres and microcapsule materials and their application as composite materials. technical background [0002] Microcapsules are a ubiquitous form of material aggregation in life phenomena, and synthetic microcapsules are also a successful commodity form with a wide range of applications. A shell material wraps another functional material, which is the main structure of capsules, and microcapsules usually refer to small capsules from submicron to millimeter scale. No matter what form it exists in, functional materials and shell materials are two types of basic elements that constitute microcapsules; the former determines the function of the microcapsule, and the latter is mainly used to assist the realization of the function of the former. The preparation of microcapsules refers to the process of encapsulating or dispe...

Claims

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Application Information

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IPC IPC(8): B01J13/14
Inventor 马光辉高飞王平张颖苏志国
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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