Preparing method for asymmetric hollow microspheres based on polymer template particles

A hollow microsphere and polymer technology, which is applied in the field of preparation of asymmetric hollow microspheres, can solve the problems of difficult large-scale production, complex and tedious synthesis process, etc., and achieves the effects of mild experimental conditions, efficient preparation method and simple operation.

Inactive Publication Date: 2016-02-17
TIANJIN QUANDA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this kind of synthesis process is complex and cumbersome, and it is difficult to realize large-scale production
The obtained asymmetric particles are usually solid particles, and there are few reports in the research literature on asymmetric hollow microspheres

Method used

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  • Preparing method for asymmetric hollow microspheres based on polymer template particles
  • Preparing method for asymmetric hollow microspheres based on polymer template particles
  • Preparing method for asymmetric hollow microspheres based on polymer template particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0021]

[0022] According to the above proportions, the pre-measured deionized water, the seed monomer styrene, the dispersant polyvinylpyrrolidone, and the initiator benzoyl peroxide are added into the reactor together, and the stirring is started, and the whole process is passed through. Nitrogen, reflux condensation, and polymer template particles are obtained when the system reaches 70 °C and polymerized for 10 hours;

[0023]

[0024] A certain amount of the polymer particle suspension (25.0g) obtained in the step (a) was mixed with a certain proportion of ethanol / water (18.0g / 2.0g) solution, and a certain amount of 5mol / L NaOH solution was used to make the system The pH was adjusted to 14, and after stirring for ten minutes, the silane coupling agent 3-mercaptopropyltriethoxysilane was rapidly added, and the stirring was continued at 50° C. for 3 hours to obtain asymmetric silica hollow microspheres.

[0025] When the polymer particles are mixed with the silane cou...

Embodiment example 2-5

[0028] In Example 2-5, the amount of the silane coupling agent was changed to 1.0g, 3.0g, 4.0g, and 8.0g, respectively. The remaining steps were the same as Example 1.

Embodiment example 6-7

[0030] In Example 6-7, the silane coupling agent was changed to tetraethoxysilane and 3-aminopropyltriethoxysilane, respectively, and the remaining steps were the same as Example 1.

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Abstract

The invention relates to a preparing method for asymmetric hollow microspheres based on polymer template particles. According to the method, the quantity of a dispersing agent and seed monomers is adjusted so that the dimension size of a dispersing phase before polymerization can be changed, the dimension of the polymer template particles is adjusted, and thus the dimension of the final hollow microspheres is controlled. The hydrolysis rate of silane can be controlled by adjusting the charging proportion of ethyl alcohol/water, so that the time for the sol-gel process in the second step is controlled, and the hollow microspheres with morphologic changes can be prepared. Soap-free emulsion polymerization is adopted in the method, operation is easy, experiment conditions are mild, and the asymmetric hollow microspheres with different microstructures can be efficiently prepared and easily separated and processed further, and great significance is achieved on the research and application of the asymmetric hollow microspheres. The synthetic process is easy and convenient to implement and capable of easily achieving mass production, has universality and is suitable for other polymer systems.

Description

technical field [0001] The invention belongs to the synthesis of asymmetric particles, in particular to a preparation method of asymmetric hollow microspheres based on polymer template particles. technical background [0002] Asymmetric particles generally refer to particles with asymmetric and uneven distribution of shape, chemical composition and / or properties, also known as Janus particles or anisotropic particles. Such particles have attracted more and more attention due to their attractive application prospects in optical biosensors, electronic displays, functional probes, self-assembly, and surfactants. There are also various preparation methods. The main preparation methods of anisotropic composite particles commonly reported in the literature include: microfluidic method, template self-assembly method, dispersion polymerization method, emulsion polymerization method, etc. [0003] The microfluidic synthesis method is simply that oil phase 1 and oil phase 2 enter the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14
Inventor 王娜
Owner TIANJIN QUANDA TECH
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