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Process for preparing polyphenylethylene/tin dioxide nucleic shell microball

A technology of polystyrene microspheres and tin dioxide, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of not being able to obtain core-shell materials, and achieve the effects of uniform adsorption, uniform size, and high efficiency

Inactive Publication Date: 2006-06-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these methods need to use high temperature to convert the tin dioxide precursor into crystalline tin dioxide, the polymer template will be removed during high temperature treatment, so the composite core-shell material of the two cannot be obtained.

Method used

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  • Process for preparing polyphenylethylene/tin dioxide nucleic shell microball
  • Process for preparing polyphenylethylene/tin dioxide nucleic shell microball
  • Process for preparing polyphenylethylene/tin dioxide nucleic shell microball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Put sodium lauryl sulfate with a mass ratio of 0.4:560:100, high-purity water, and styrene distilled under reduced pressure into a round-bottomed three-neck flask, feed nitrogen to remove oxygen, heat up to 80°C, and add Potassium persulfate equivalent to 1 / 100 of the quality of styrene initiates polymerization. After reacting for 6 hours, it is demulsified by sodium chloride solution, filtered and washed several times, and dried at room temperature in a vacuum oven to obtain a 190-nm diameter Polystyrene microspheres.

[0018] (2) Add 0.2 mol / L tin salt solution to the Erlenmeyer flask, raise the temperature to 60°C, add 2 mol / L ammonia solution dropwise under stirring, adjust the pH value of the solution to 7, react for 2 hours, and let stand for 24 hours , then filtered, washed and dried, and treated in a muffle furnace at 600°C for 2 hours, and ground to obtain tin dioxide powder with a particle size of about 20 to 30 nanometers;

[0019] (3) Add 1wt% polystyre...

Embodiment 2

[0021] Repeat the dispersion of polystyrene microspheres and the adsorption process of tin dioxide in Example 1 to obtain polystyrene / tin dioxide core-shell microspheres adsorbing three layers of tin dioxide. Figure 5 It is the field emission scanning electron microscope photo of the obtained polystyrene / tin dioxide core-shell microspheres adsorbing three layers of tin dioxide. It can be seen that the tin dioxide layer adsorbed by the outer layer is uniform, and the particle size of the microspheres is obviously larger than Polystyrene / tin dioxide core-shell microspheres with a layer of tin dioxide adsorbed.

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Abstract

The invention discloses a manufacture method for polystyrene / cassiterite nucleocapsid microsphere that adopts self-assembly method in solution to make nucleocapsid microshere, uses micro-emulsion polymerization to make polystyrene microsphere and sol gel method to make nm cassiterite, uses self-assembly method in solution to made polystyrene / cassiterite nucleocapsid microsphere. It disperses polystyrene microsphere in the NaCl water solution, cationic surface active agent, anionic surface active agent, and cationic surface active agent water solution. The polystyrene microsphere is dispersed in NaCl water solution adding nm cassiterite, taking centrifugal separation, washing, drying to gain polystyrene / cassiterite nucleocapsid microsphere. The process is easy to control. The invention has the advantages of low consumption, common material, equal cassiterite layer.

Description

Technical field: [0001] The invention relates to a preparation method of polystyrene / tin dioxide core-shell microspheres, in particular to the preparation of polystyrene / tin dioxide core-shell microspheres by a self-assembly method in a solution, and belongs to the field of chemistry and material preparation. Background technique: [0002] The research and development of new composite materials and new composite methods have always been favored by people. Polymer materials and nano-semiconductor materials have different physical and chemical properties. It is a new type of core-shell microspheres to make them into core and shell respectively. way of compounding materials. Nano-tin dioxide is a widely used semiconductor functional material, which can be used in functional devices such as gas sensors, glass electrodes, electronic transistors, and solar cells. Combining it with polymer materials to prepare materials with special structures and properties will be an important w...

Claims

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Application Information

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IPC IPC(8): C08J3/00C09K3/00
Inventor 黄怡李梅路庆华
Owner SHANGHAI JIAO TONG UNIV
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