Raspberry-like polystyrene microsphere/silicon dioxide composite particles and preparation method and use thereof

A technology of polystyrene microspheres and silicon dioxide, which is applied in the preparation of microspheres and microcapsule preparations, and can solve the problems that it is difficult to obtain composite particles with regular structures

Active Publication Date: 2011-04-20
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chen et al. used a dual-template method combined with a sol-gel method to directly grow small silica particles on the surface of large-sized polystyrene microspheres to prepare raspberry-shaped composite particles (X. Wu, Y. Tian, ​​Y. Cui, L.Wei, Q.Wang, Y.Chen, J.Phys.Chem.C 2007, 111, 9704.), It is difficult to obtain composite particles with regular structure and monodisperse by using sol-gel method combined with template method
Therefore, it is still a challenge to adopt a simple, efficient and low-cost method to prepare structured raspberry-like composite particles.

Method used

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  • Raspberry-like polystyrene microsphere/silicon dioxide composite particles and preparation method and use thereof
  • Raspberry-like polystyrene microsphere/silicon dioxide composite particles and preparation method and use thereof
  • Raspberry-like polystyrene microsphere/silicon dioxide composite particles and preparation method and use thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1. carry out oxygen plasma treatment to polystyrene microsphere surface

[0034] Select commercially available polystyrene microspheres (solid powder state) with a particle size of 50-200nm, 200-500nm and 500-800nm ​​as the core to prepare raspberry-shaped polystyrene microspheres (core) / dioxide Silicon (shell) organic-inorganic composite particles.

[0035] The specific process of oxygen plasma treatment is: after grinding the above-mentioned commercially available polystyrene microsphere solid powder, transfer it to the sample chamber of the plasma cleaner (Chengdu Mingheng Technology Development Co., Ltd.), and evacuate the sample chamber through a vacuum pump. , make the pressure difference between the sample chamber and the sample chamber be -1~-0.1MPa, then pass oxygen into the sample chamber through the gas flow meter, and keep the gas flow rate at 600~1000mL / min. Continue to evacuate the sample chamber through the vacuum pump. When the air pressure i...

Embodiment 2

[0036] Example 2. Preparation of raspberry-shaped polystyrene microspheres (core) / silicon dioxide (shell) organic-inorganic composite particles

[0037] Put 0.5~1.5g of polystyrene microspheres with a particle size of 50~200nm, 200~500nm and 500~800nm ​​through the oxygen plasma treatment in Example 1 respectively into a 150mL conical flask equipped with 100mL absolute ethanol middle; put the container loaded with the polystyrene microspheres into an ultrasonic cleaner, and the polystyrene microspheres were ultrasonically treated in the ultrasonic cleaner for 10 to 30 minutes at a power of 80 to 120W to obtain a suspension; When the above-mentioned suspension was subjected to slow electromagnetic stirring (30-60 rpm) respectively, 3-6 mL of ammonia water (concentration was 25-28 wt%) was added respectively; slow electromagnetic stirring (30-60 rpm) was carried out for 10 to After 30 minutes, carry out strong electromagnetic stirring (120-180 rpm), and add tetraethoxysilane to ...

Embodiment 3

[0042] Embodiment 3. the application of raspberry shape polystyrene microsphere (core) / silicon dioxide (shell) organic-inorganic composite particle

[0043] Utilize the polystyrene microspheres of 50~200nm and 200~500nm respectively in the particle size of oxygen plasma treatment in embodiment 1 as core, the raspberry shape polystyrene microsphere (core) prepared in embodiment 2 / Silica (shell) organic-inorganic composite particles are used as building blocks and the electrostatic layered self-assembly method is used to prepare porous silica hollow sphere coatings on the glass surface. The schematic diagram of the preparation process is as follows Figure 7 shown. The specific process is as follows: First, the newly synthesized and undried raspberry-shaped polystyrene microspheres (core) / silica (shell) organic-inorganic composite particles are dispersed in ultrapure water, and cleaned in an ultrasonic cleaner. Sonicate for 30 minutes at medium 100W power. Secondly, the glass...

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Abstract

The invention belongs to the technical field of nanomaterial preparation and particularly relates to raspberry-like polystyrene microsphere / silicon dioxide composite particles and a preparation method and use thereof. In the invention, the monodispersed raspberry-like polystyrene microsphere (core) / silicon dioxide (shell) organic-inorganic composite particles are prepared by using polystyrene microspheres treated by oxygen plasma as cores and by a sol-gel process. The preparation method is to perform hydroxylation on the surfaces of the polystyrene microspheres by using the oxygen plasma treatment process which is simple and low in cost. The prepared raspberry-like polystyrene microsphere(core) / silicon dioxide(shell) organic-inorganic composite particles can be used as building modules, and a porous silicon dioxide hollow sphere coating, which has ultrahigh hydrophily and antifog performance, is formed on glass by an electrostatic layered self-assembly process.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to raspberry-shaped polystyrene microsphere (core) / silicon dioxide (shell) organic-inorganic composite particles, a preparation method thereof, and applications of the composite particles. Background technique [0002] In recent years, the organic / inorganic composite particles with hierarchical surface topography and regular structure (that is, small-sized particles uniformly cover the surface of large-sized particles) have become more and more popular due to their high surface roughness and potential applications. more and more people's attention. For example, in recent years, by studying the surface topology of lotus leaves with self-cleaning function, material scientists have found that the microscopic surface of lotus leaves is very rough and composed of superhydrophobic substances. Raspberry shape) spherical particles, and use this spherical particle as a buil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 贺军辉杜鑫
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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