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Hollow polymer microsphere and method for preparing same

A polymer and polymer layer technology, applied in the field of polymer hollow microspheres and its preparation, can solve the problems of practical application limitations, thermal stability and chemical stability to be improved, and achieve high chemical stability and broad application prospects and the effect of using value and simple operation

Inactive Publication Date: 2005-06-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The self-assembly method and the template method have strict system requirements and need to be carried out at extremely low polymer concentrations, so their practical applications are greatly limited.
Although the emulsion polymerization method is simple, efficient and reproducible, its thermal stability and chemical stability need to be improved.

Method used

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  • Hollow polymer microsphere and method for preparing same
  • Hollow polymer microsphere and method for preparing same
  • Hollow polymer microsphere and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 20ml of ethyl orthosilicate, 250ml of absolute ethanol and 10ml of ammonia water into a three-necked flask equipped with a reflux condensing device and a stirrer, stir in a water bath at 25°C for 24 hours, and then slowly evaporate to remove part of the ethanol to obtain SiO 2 Alcoholic solution of nanoparticles. Accurately weigh 8ml of the alcohol solution of silica nanoparticles (concentration: 0.025g / ml), and add dropwise 20ml of the ethanol solution of KH-570 silane coupling agent (concentration: 0.025g / ml). Then react in a water bath at 35°C for 36 hours, and dry in vacuum at 35°C overnight to obtain the purified SiO treated with the coupling agent. 2 Nano powder. In a three-necked flask equipped with a reflux condensing device, 1.2 g of the above-mentioned coupling agent-treated SiO 2Ultrasonic dispersion of nano powder in 10ml of absolute ethanol, while adding 0.24g of sodium bicarbonate, 0.18g of sodium lauryl sulfate and 100ml of deionized water, after u...

Embodiment 2

[0034] Same as Example 1, but the concentration of KH-570 was changed to 0.05 g / ml, and the amount of styrene monomer was changed to 15 ml.

Embodiment 3

[0036] Same as Example 1, but the concentration of KH-570 was changed to 0.1 g / ml, and the amount of styrene monomer was changed to 30 ml.

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Abstract

The invention belongs to high molecular material technological field, concretely relates to a polymer shallow micro ball and its preparing method. The high molecular shallow micro ball links the surface chemical bond of the organic nm micro ball with a layer of polymer by micro latex synthesizing method, forming the micro ball with polymer inorganic nm compound core shell structure, then wash the inorganic material by strong acid to acquire the product, whose size is mm~nn. The invention has simple operation, high efficiency, average size of micro ball, and the shallow micro ball in the polymer made has outstanding heat stability and chemical stability, with bright future of application.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and in particular relates to a polymer hollow microsphere and a preparation method thereof. Background technique [0002] Hollow structure polymer microsphere is a functional material with a special structure, the hollow part can be gas, liquid or other active ingredients with special functions, and the outer layer is a shell composed of polymer. Polymer hollow nanospheres with a particle size between nanometers and micrometers have a wide range of applications in the fields of biology, catalysis, electronics, optics and magnetism because of their small size, hollow and spherical capsules. Prospects have gradually become a research hotspot in recent years. There are three main methods for preparing hollow polymer microspheres: self-assembly method, template method and emulsion method. The two methods, self-assembly method and template method, have strict requirements on the...

Claims

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Application Information

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IPC IPC(8): C08F2/26C08F4/30C08F292/00C08J9/26C08K9/04
Inventor 杨正龙浦鸿汀
Owner TONGJI UNIV
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