Controlled polymer/inorganic compound hollow microsphere and method for preparing same

A technology of hollow microspheres and inorganic composites, applied in the field of composite materials and functional materials, can solve the problems of poor compatibility of organic matrix, decline of overall performance, poor mechanical properties, etc., and achieve good compatibility, high mechanical strength and stable size good sex effect

Inactive Publication Date: 2009-09-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both hollow polymer and inorganic microspheres have their own limitations. Polymer hollow microspheres have good compatibility with organic matrix, but have poor mechanical properties and a

Method used

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  • Controlled polymer/inorganic compound hollow microsphere and method for preparing same
  • Controlled polymer/inorganic compound hollow microsphere and method for preparing same
  • Controlled polymer/inorganic compound hollow microsphere 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] 2 parts of hollow silica microspheres (mass number)

[0039] KH-550 1 part (mass number)

[0040] 4-glycidyl ether-2,2,6,6-tetramethylpyridine-1-oxygen (GTEMPO) 0.5 parts (mass number)

[0041] 1 part of styrene (mass number)

[0042] 2g of hollow silica microspheres were ultrasonically dispersed with ethanol, added to a reaction vessel, ventilated with nitrogen, condensed and refluxed, controlled at a temperature of 80°C, added 1g of KH-550, stirred by magnetic force, reacted for 12 hours, cooled, centrifuged, and washed several times with ethanol . Then use ethanol to ultrasonically disperse, add 0.5g GTEMPO, under nitrogen atmosphere, stir at room temperature for 36 hours, centrifuge, and wash repeatedly with ethanol several times to ensure that all unreacted GTEMPO is removed. Hollow silica microspheres connected with nitroxide radicals were dispersed with toluene, under nitrogen protection, 1 g of styrene ...

Embodiment 2

[0044] The ratio of raw materials used is as follows:

[0045] 2 parts of hollow silica microspheres (mass number)

[0046] KH-550 1 part (mass number)

[0047] GTEMPO 0.5 part (mass number)

[0048]Azobisisobutyronitrile (AIBN) 0.1 part (mass number)

[0049] 1 part of styrene (mass number)

[0050] 2g of hollow silica microspheres were ultrasonically dispersed with ethanol, added to a reaction vessel, ventilated with nitrogen, condensed and refluxed, controlled at a temperature of 80°C, added 1g of KH-550, stirred by magnetic force, reacted for 12 hours, cooled, centrifuged, and washed several times with ethanol . Then use ethanol to ultrasonically disperse, add 0.5g GTEMPO, under nitrogen atmosphere, stir at room temperature for 36 hours, centrifuge, and wash repeatedly with ethanol several times to ensure that all unreacted GTEMPO is removed. The hollow silica microspheres connected with nitroxide radicals were dispersed with toluene, under the protection of nitrogen,...

Embodiment 3

[0052] The ratio of raw materials used is as follows:

[0053] 2 parts of hollow silica microspheres (mass number)

[0054] KH-550 1 part (mass number)

[0055] GTEMPO 0.5 part (mass number)

[0056] Azobisisobutyronitrile (AIBN) 0.1 part (mass number)

[0057] 2 parts of styrene (mass number)

[0058] 2g of hollow silica microspheres were ultrasonically dispersed with ethanol, added to a reaction vessel, ventilated with nitrogen, condensed and refluxed, controlled at a temperature of 80°C, added 1g of KH-550, stirred by magnetic force, reacted for 12 hours, cooled, centrifuged, and washed several times with ethanol . Then use ethanol to ultrasonically disperse, add 0.5g GTEMPO, under nitrogen atmosphere, stir at room temperature for 36 hours, centrifuge, and wash repeatedly with ethanol several times to ensure that all unreacted GTEMPO is removed. The hollow silica microspheres connected with nitroxide radicals were dispersed with toluene, under the protection of nitroge...

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Abstract

The invention belongs to the technical fields of compound materials and functional polymer materials, and particularly relates to a controlled polymer/inorganic compound hollow microsphere and a method for preparing the same. The preparation method comprises the following steps that: the surface of a silicon dioxide hollow microsphere is modified by KH-550; and a nitrogen-oxygen free radical is inoculated to the surface of silicon dioxide, and the nitrogen-oxygen free radical is used for triggering the active free radical polymerization on the surface of a monomer to form a controlled polymer layer. The microsphere prepared by the method has the advantages of uniform size, good size stability, big mechanical strength, good compatibility with an organic substrate, difficult falling-off of the polymer layer, controllable thickness of an inorganic layer and the polymer layer, quite strong designability and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of composite materials and functional materials, and in particular relates to a controllable polymer / inorganic composite hollow microsphere and a preparation method thereof. Background technique [0002] 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 particle sizes between nanometers and micrometers have broad application prospects in the fields of biology, catalysis, electronics, optics, and magnetism because of their small size, hollow and spherical capsules. , has gradually become a research hotspot in recent years. [0003] There are three main methods for preparing polymer hollow microspheres: self-assembly method, template method and emulsion method. There are many methods for preparing...

Claims

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Application Information

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IPC IPC(8): B01J13/02
Inventor 浦鸿汀秦玉洁袁俊杰万德成
Owner TONGJI UNIV
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