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Preparation method of polysilsesquioxane hollow microspheres

A technology of polysilsesquioxane and hollow microspheres, which is applied in the field of new materials, can solve the problems of limited size range of microspheres and cumbersome operation steps, and achieve controllable particle size and wall thickness, good mechanical strength, and production equipment simple effect

Active Publication Date: 2012-07-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polysiloxane hollow molecular box prepared by this method is nanoscale, the size range of the microsphere is limited, the template needs to be removed, and the operation steps are cumbersome

Method used

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  • Preparation method of polysilsesquioxane hollow microspheres
  • Preparation method of polysilsesquioxane hollow microspheres
  • Preparation method of polysilsesquioxane hollow microspheres

Examples

Experimental program
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Effect test

Embodiment 1

[0038] In a 50.0mL beaker, add 2.0mL toluene and 5.0mL methyltriethoxysilane, stir to make the mixture uniform, add this solution to a 250.0mL three-neck round bottom flask, add 100.0mL deionized water, and control the temperature 5.0°C, start stirring and keep the rotation speed at 800rpm, stir for 30.0min, mix well, add 1.0mL 1.0M NaOH solution, maintain the same temperature and stirring speed, polymerize for 8.0h, and obtain a white suspension product. The product is separated by centrifugation and air-dried at room temperature to obtain polymethylsilsesquioxane hollow microspheres in the form of white powder. The particle size of the hollow microsphere is 0.7-1.0 μm, and the wall thickness is 100-200 nm. Such as figure 1 shown.

Embodiment 2

[0040] In a 50.0mL beaker, add 2.0mL toluene and 7.0mL methyltriethoxysilane, stir to make the mixture uniform, add this solution to a 250.0mL three-neck round bottom flask, add 100.0mL deionized water, and control the temperature 5.0°C, start stirring and keep the rotation speed at 800rpm, stir for 30.0min, mix well, add 1.0mL 1.0M NaOH solution, maintain the same temperature and stirring speed, polymerize for 8.0h, and obtain a white suspension product. The product is separated by centrifugation and air-dried at room temperature to obtain polymethylsilsesquioxane hollow microspheres in the form of white powder. The particle size of the hollow microsphere is 1.5-2.0 μm, and the wall thickness is 300-500 nm. Such as figure 2 shown.

Embodiment 3

[0042] In a 50.0mL beaker, add 2.0mL toluene and 5.0mL methyltriethoxysilane, stir to make the mixture uniform, add this solution to a 250.0mL three-neck round bottom flask, add 100.0mL deionized water, and control the temperature 5.0°C, start stirring and keep the rotation speed at 500rpm, stir for 30.0min, mix well, add 1.0mL 1.0M NaOH solution, maintain the same temperature and stirring speed, polymerize for 8.0h, and obtain a white suspension product. The product is separated by centrifugation and air-dried at room temperature to obtain polymethylsilsesquioxane hollow microspheres in the form of white powder. The particle size of the hollow microsphere is 1.8-2.3 μm, and the wall thickness is 300-500 nm. Such as image 3 shown.

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Abstract

The invention relates to a preparation method of polysilsesquioxane hollow microspheres. In the method, a trifunctional silane monomer is used as a raw material, an organic solvent is used as a template and the polysilsesquioxane hollow microspheres are prepared by utilizing the oil-in-water (O / W) suspension polymerization. According to the invention, the raw material is easy to obtain, the reaction condition is mild, the method is simple and convenient to operate, the step of removing a template core does not need to be carried out, and the cost is low. The hollow microspheres prepared by the method disclosed by the invention are white powder particles, have a polysilsesquioxane organic-inorganic hybrid material as a component, have low density and good mechanical strength, do not contain a surfactant, have physiological inert and can be loaded with object molecules. The particle sizes of the polysilsesquioxane hollow microspheres can be controlled in the range of 200nm to 5.0mum. The polysilsesquioxane hollow microspheres can be used as high-end packing, light scattering particles, a medicament and catalyst carrier, a microreactor and the like and are widely used for the fields of chemical industry, cosmetics, catalysis, separation, medicinal preparation, environmental protection and the like.

Description

technical field [0001] The invention relates to a preparation method of polysilsesquioxane hollow microspheres, belonging to the technical field of new materials. Background technique [0002] In recent years, the preparation of polymeric hollow microspheres has received extensive attention. Hollow structure materials have the characteristics of low density, high specific surface area, high surface permeability, and large internal space. They can be used as smart containers for coating or controlled release of guest molecules. They are used in fillers, drug sustained release, catalysis, microreactors and Environmental protection and other fields have broad application prospects. [0003] At present, there are three main methods for preparing polymeric hollow microspheres: self-assembly method, template method and microemulsion method. Self-assembly method: the amphiphilic block copolymer forms core-shell micelles or vesicles in a selective solvent, and then solidifies the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/06
Inventor 朱庆增曹姣洁白瑞钦
Owner SHANDONG UNIV
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