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Multifunctional organic-inorganic composite polymeric microball and preparing method thereof

A technology of polymer microspheres and composite polymers, applied in the field of organic-inorganic composite polymer microspheres and their preparation, to achieve high stability and simple operation

Inactive Publication Date: 2003-11-12
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no relevant literature reports on organic-inorganic composite polymer microspheres with multiple responsive properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: In a 500mL three-necked flask, add 2.0g of an aqueous dispersion of ferric oxide, add 40mL of water, 3mL of concentrated ammonia water and 160mL of methanol, stir at high speed (about 500 rpm) for 0.5 hours, and mix thoroughly. Then add a mixed solution of tetraethyl orthosilicate and methanol (3mL tetraethyl orthosilicate + 30mL methanol), stir at high speed for 5 minutes, then adjust the stirring speed to about 150 rpm, and then place it in an oil bath at 40°C After the reaction was carried out for 24 hours, 2.0 mL of coupling agent MPS was added, and the reaction was continued for 24 hours. Finally, the reaction system was cooled to room temperature with stirring. The product was collected by centrifugation, washed several times with ethanol and water, and finally divided into deionized water to obtain an aqueous dispersion of ferric oxide nanoparticles coated with silicon dioxide modified by a silane coupling agent. The solids content is about 2.0 wt%. ...

Embodiment 2

[0035] Example 2: In a 500mL three-necked flask, add 4.20g of an aqueous dispersion of ferric oxide, add 40mL of water, 3mL of concentrated ammonia water and 160mL of methanol, stir at high speed (about 500 rpm) for 0.5 hours, and mix thoroughly. Then add a mixed solution of tetraethyl orthosilicate and methanol (3mL tetraethyl orthosilicate + 30mL methanol), stir at high speed for 5 minutes, then adjust the stirring speed to about 150 rpm, and then place it in an oil bath at 40°C After the reaction was carried out for 24 hours, 2.0 mL of MPS was added, and the reaction was continued for 24 hours. Finally, the reaction system was cooled to room temperature with stirring. The product is collected by centrifugation, washed with ethanol and water several times, and finally divided into deionized water to obtain an aqueous dispersion of ferric oxide coated with silicon dioxide modified by a silane coupling agent. About 2.0 wt%.

[0036] In a 100mL three-necked flask, add 2.0g of...

Embodiment 3

[0037] Example 3: In a 500mL three-necked flask, add 4.20g of an aqueous dispersion of ferric oxide, add 40mL of water, 3mL of concentrated ammonia water and 160mL of methanol, stir at high speed (about 500 rpm) for 0.5 hours, and mix thoroughly. Then add a mixed solution of tetraethyl orthosilicate and methanol (3mL tetraethyl orthosilicate + 30mL methanol), stir at high speed for 5 minutes, then adjust the stirring speed to about 150 rpm, and then place it in an oil bath at 40°C After the reaction was carried out for 24 hours, 2.0 mL of MPS was added, and the reaction was continued for 24 hours. Finally, the reaction system was cooled to room temperature with stirring. The product is collected by centrifugation, washed with ethanol and water several times, and finally divided into deionized water to obtain an aqueous dispersion of ferric oxide coated with silicon dioxide modified by a silane coupling agent. About 2.0 wt%.

[0038] In a 100mL three-necked flask, add 2.0g of...

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Abstract

The present invention relates to an organic-inorganic composite high-molecular microsphere with multiple response property and its preparation method. Said method includes the following steps: using alkyl metasilicate as precursor, utilizing gel-sol process to prepare magnetic nano granules covered with silicon dioxide, and using silicane coupling agent to make surface modification, then adopting template polymerization process, using the above-mentioned magnetic nano granules as seed and using isopropyl acrylamide or its derivative as main monomer, and using acrylic acid or its salt as functional monomer and controlling the dose of main monomer, functional monomer and crosslinking agent to prepare the organic-inorganic composite high-molecular microsphere with different swelling ratios.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an organic-inorganic composite polymer microsphere with multiple functions such as magnetism and temperature sensitivity and a preparation method thereof. technical background [0002] Stimuli-responsive polymer microspheres are a kind of functional polymer microspheres that people are very interested in in recent years. They can respond to external stimuli (such as temperature, pH, ionic strength, pressure, electric field, magnetic field, etc.) Its own physical and chemical properties, colloidal properties, etc. change. The responsiveness of polymer microspheres to external stimuli makes them of great value both in the field of basic research and in the field of application. Magnetic polymer microspheres are one of these polymer microspheres. They are microspheres with magnetic properties and special structures formed by combining organic polymers and inor...

Claims

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Application Information

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IPC IPC(8): C08F2/44C08K9/02C08L33/26
Inventor 杨武利邓勇辉汪长春府寿宽
Owner FUDAN UNIV
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