A hollow submicron sphere, its preparation method and application

A submicron, hollow technology, applied in the field of organic-inorganic hybrid hollow submicron spheres and their preparation, can solve the problems of wide particle size distribution of hollow microspheres, a large number of organic solvents, complex system components, etc. Simple process and simple system composition

Active Publication Date: 2016-02-24
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hollow microspheres obtained by the soft template method have a wide particle size distribution, complex system components, and relatively poor controllability
In addition, a large amount of organic solvents are required in the process of removing the template or preparing the emulsion, causing great environmental pollution.

Method used

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  • A hollow submicron sphere, its preparation method and application
  • A hollow submicron sphere, its preparation method and application
  • A hollow submicron sphere, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The raw materials are 3-methacryloyloxypropyltrimethoxysilane (TPM), silica colloid particles (LudoxTM40) with a particle size of 30 nm, isoamyl acetate (PEA), and the initiator is potassium persulfate. Add 0.5mL of TPM, 0.65mL of silica colloidal particle dispersion, and 1mL of PEA into 40mL of water, stir at 15°C for 16 hours, pass nitrogen gas and exhaust oxygen for 30 minutes, then raise the temperature to 70°C, add 10mg of potassium persulfate to initiate polymerization, and the polymerization reaction lasts for 12 Hour. The resulting emulsion was centrifuged, washed three times with ethanol, dispersed in water, and freeze-dried to obtain a white powdery solid.

[0052] The above-mentioned powder was dispersed in ethanol to make a transmission electron microscope sample and a scanning electron microscope sample, and the particle morphology was observed. like figure 1 As shown, the particles have an obvious hollow structure, and there are nanoparticles embedded in...

Embodiment 2

[0054] The raw materials are 3-methacryloyloxypropyltrimethoxysilane (TPM), colloidal silica particles (LudoxHS40) with a particle size of 12 nanometers, isoamyl acetate (PEA), and the initiator is potassium persulfate. Add 1mL of TPM, 0.28mL of silica colloidal particle dispersion, and 2mL of PEA into 40mL of water, stir at 20°C for 24 hours, pass nitrogen gas and exhaust oxygen for 30 minutes, then raise the temperature to 65°C, add 10mg of potassium persulfate to initiate polymerization, and the polymerization reaction lasts for 12 hours . The resulting emulsion was centrifuged, washed three times with ethanol, dispersed in water, and freeze-dried to obtain a white powdery solid.

[0055] The above-mentioned powder was dispersed in ethanol to make a transmission electron microscope sample and a scanning electron microscope sample, and the particle morphology was observed. like figure 2 As shown, the particles have an obvious hollow structure, and there are nanoparticles ...

Embodiment 3

[0057] The raw materials are 3-methacryloyloxypropyltrimethoxysilane (TPM), silica colloidal particles (LudoxHS40) with a particle size of 7 nm, isoamyl acetate (PEA), and the initiator is potassium persulfate. Add 1mL of TPM, 0.225mL of silica colloidal particle dispersion, 2mL of PEA into 40mL of water, stir at 20°C for 24 hours, pass nitrogen gas and exhaust oxygen for 30 minutes, then raise the temperature to 65°C, add 10mg of potassium persulfate to initiate polymerization, and the polymerization reaction lasts for 12 hours . The resulting emulsion was centrifuged, washed three times with ethanol, dispersed in water, and freeze-dried to obtain a white powdery solid.

[0058] The above-mentioned powder was dispersed in ethanol to make a transmission electron microscope sample and a scanning electron microscope sample, and the particle morphology was observed. like image 3 As shown, the particles have an obvious hollow structure, and there are nanoparticles embedded in t...

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Abstract

The invention discloses a hollow sub-microsphere as well as a preparation method and an application thereof. A shell of the sub-microsphere adopts an organic and inorganic composite structure, so that the thermodynamic stability and the structural stability are high; meanwhile, the hollow sub-microsphere has internally-hydrophobic and externally-hydrophilic characteristics, can be applied to fields of oil-water separation, hydrophobic drug delivery, catalyst protection, nano-reactors and the like and is a material with the broad application prospect. The preparation method is simple in process and good in repeatability, and removal conditions of templates are mild; and water is used as a dispersion medium, so that environmental pollution is little.

Description

technical field [0001] The invention relates to a hollow submicron sphere and its preparation method and application, in particular to an organic-inorganic hybrid hollow submicron sphere and its preparation method and application. Background technique [0002] Hollow microsphere is a new type of particulate material developed in the 1950s and 1960s. Its diameter ranges from nanometers to hundreds of microns, and it is hollow inside. It is a material with a special structure. Compared with solid spheres or non-spherical particles of the same size, hollow microspheres have the advantages of low density and large specific surface area. In addition, due to its large hollow volume, its guest loading capacity is greatly increased, and it can accommodate large-sized guests, resulting in a microscopic "wrapping" effect, which makes hollow microspheres have broad application prospects as a new type of functional material, such as for light Quality fillers, separation materials, cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/14
Inventor 邱东关银燕张新萍谢玥
Owner INST OF CHEM CHINESE ACAD OF SCI
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