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Functional hollow earth silicon microballoons and method for preparing same

A silica and functionalized technology, applied in the field of composite materials and functional materials, can solve problems such as limited application, and achieve the effects of simple preparation, low density and large specific surface area

Inactive Publication Date: 2008-10-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of the hollow silica microspheres prepared by these methods only has silanol functional groups.
This limits its application in many ways

Method used

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  • Functional hollow earth silicon microballoons and method for preparing same
  • Functional hollow earth silicon microballoons and method for preparing same
  • Functional hollow earth silicon microballoons and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The ratio of raw materials used is as follows:

[0038] 100 parts (weight) of positively charged polystyrene microspheres on the surface

[0039] Ammonia (28wt.%) 80 parts (weight)

[0040] Vinyl triethoxysilane 50 parts (weight)

[0041] 400 parts (weight) of ethanol

[0042] 50 parts of deionized water (by weight)

[0043] According to the proportions of the above components, the polystyrene microspheres with positive charges on the surface were ultrasonically dispersed in the mixed medium of ethanol and water for 0.5 hours to obtain sample a. In a four-neck flask with nitrogen gas, heat to 50°C, then pour ammonia water into the reactor and stir for 5-15 minutes, then quickly pour vinyltriethoxysilane into the reaction container, and continue to stir the reaction 5-8 hours. Stop heating afterwards, after cooling to room temperature, carry out centrifugation, and wash 3-4 times with ethanol and water. This is vinyl-functionalized hollow silica microspheres.

Embodiment 2

[0045] The ratio of raw materials used is as follows:

[0046] 100 parts (weight) of positively charged polystyrene microspheres on the surface

[0047] Ammonia (28wt.%) 80 parts (weight)

[0048] Vinyl trimethoxysilane 20 parts (weight)

[0049] 400 parts (weight) of ethanol

[0050] 50 parts of deionized water (by weight)

[0051] According to the proportion of the above components, the polystyrene microspheres with positive charges on the surface were ultrasonically dispersed in the mixed medium of ethanol and water for 0.5 hours to obtain sample a. At this time, the sample a was heated to 60°C, and ammonia water Put it into the reactor and stir for 5-15 minutes, then quickly pour vinyltrimethoxysilane into the reaction vessel, and continue to stir and react for 5-8 hours. Stop heating afterwards, after cooling to room temperature, carry out centrifugation, and wash 3-4 times with ethanol and water. At this point, vinyl-functionalized hollow silica microspheres are obt...

Embodiment 3

[0053] The ratio of raw materials used is as follows:

[0054] 100 parts (weight) of positively charged polystyrene microspheres on the surface

[0055] Sodium hydroxide solution (0.01mol / L) 2 parts (weight)

[0056] 20 parts (weight) of γ-(methacryloyloxy)propyltrimethoxysilane

[0057] Methanol 400 parts (weight)

[0058]50 parts of deionized water (by weight)

[0059] According to the proportion of the above components, the positively charged polystyrene microspheres on the surface were ultrasonically dispersed in the mixed medium of methanol and water for 0.5 hours to obtain sample a. At this time, the sample a was heated to 40°C, and the hydrogen Pour the sodium solution into the reactor and stir for 5-15 minutes, then quickly pour γ-(methacryloyloxy)propyltrimethoxysilane into the reaction vessel, and continue to stir and react for 5-8 hours. Stop heating afterwards, after cooling to room temperature, carry out centrifugation, and wash 3-4 times with ethanol and wate...

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Abstract

The invention pertains to the technical field of composite materials and function materials, in particular to a functionalized hollow silica microsphere and a preparation method thereof. The functionalized hollow silica microsphere is formed by taking polystyrene microspheres with positive charge as a template and by taking alkali as an etchant and a catalyst to lead silane coupling agent to carry out condensation and hydrolysis on the surfaces of the polystyrene microspheres; meanwhile, the polystyrene microspheres are etched. The varied functional groups functionalized hollow silica microspheres prepared by the invention have small density, large specific area and special functional groups, thereby being used for absorbing heavy metals, proton exchange membrane conductivity modifiers, functional filling and functional material carriers.

Description

technical field [0001] The invention belongs to the technical field of composite materials and functional materials, and in particular relates to a functionalized hollow microsphere and a preparation method thereof. Background technique [0002] With the rapid development of nanotechnology, nanoparticles with novel topological structures have attracted great interest in recent years. Among them, the hollow microsphere is a functional material with a special structure, the hollow part can be gas, liquid or other active components with special functions, and the outer layer is a shell composed of inorganic substances or polymers. Polymer hollow nanospheres with a particle size between nanometers and micrometers have a wide range of applications in the fields of biology, catalysis, electronics, optics and magnetism because of their small size, hollow and spherical capsules. prospect, [0003] There are many methods for preparing silica hollow microspheres, including template / ...

Claims

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Application Information

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IPC IPC(8): C01B33/18
Inventor 袁俊杰浦鸿汀杨正龙滕新荣
Owner TONGJI UNIV
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