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A kind of preparation method of hydrophilic acrylamide-based cross-linked polymer microspheres

An acrylamide-based, cross-linked polymer technology, which is applied in the direction of drilling compositions, chemical instruments and methods, can solve the problems of wide distribution and large particle size of polymer microspheres, and achieve low cost and low viscosity of the system , The effect of environmental protection in the reaction process

Inactive Publication Date: 2020-04-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing hydrophilic acrylamide-based cross-linked polymer microspheres, which effectively solves the problem of large particle size and wide distribution of polymer microspheres prepared in the prior art

Method used

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  • A kind of preparation method of hydrophilic acrylamide-based cross-linked polymer microspheres
  • A kind of preparation method of hydrophilic acrylamide-based cross-linked polymer microspheres
  • A kind of preparation method of hydrophilic acrylamide-based cross-linked polymer microspheres

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Step 1: Add 80 parts of methacryloxyethyl trimethylammonium chloride to 70 parts of distilled water, stir well, and then add 0.01 parts of 2,2-azo (2-methylpropyl amidine) Stir the dihydrochloride evenly, then heat the water bath to 50-60℃ for 6-7h while blowing nitrogen for 30-40 minutes;

[0024] Step 2: Take out the reaction product of step 1, wash it with ethanol 3 times, add acetone to dilute it, then put it in an oven at 50-55℃ for 24 hours, dry and pulverize to obtain polymethacryloxyethyl triacetate Methyl ammonium chloride is ready for use;

[0025] Step 3: Take 18 parts of ammonium sulfate and add to 45 parts of distilled water, fully stir and dissolve to obtain an ammonium sulfate solution;

[0026] Step 4: Add 1.5 parts of acrylamide, 2 parts of methacryloyloxyethyl trimethylammonium chloride, 1 part of acrylic acid, 0.02 parts of 2,2-azo(2-methylpropane Amidine) dihydrochloride, co-crosslinking agent, and dispersant are added to the ammonium sulfate solution in ...

Embodiment 2

[0029] Step 1: Add 85 parts of methacryloxyethyl trimethylammonium chloride to 75 parts of distilled water, stir well, and then add 0.05 parts of 2,2-azo (2-methylpropyl amidine) Stir the dihydrochloride evenly, then heat the water bath to 50-60℃ for 6-7h while blowing nitrogen for 30-40 minutes;

[0030] Step 2: Take out the reaction product of step 1, wash it with ethanol 3 times, add acetone to dilute it, then put it in an oven at 50-55℃ for 24 hours, dry and pulverize to obtain polymethacryloxyethyl triacetate Methyl ammonium chloride is ready for use;

[0031] Step 3: Add 20 parts of ammonium sulfate to 50 parts of distilled water, fully stir and dissolve to obtain an ammonium sulfate solution;

[0032] Step 4: Add 2.0 parts of acrylamide, 2.5 parts of methacryloyloxyethyl trimethylammonium chloride, 1.8 parts of acrylic acid, 0.03 parts of 2,2-azo(2-methylpropane Amidine) dihydrochloride, co-crosslinking agent, and dispersant are added to the ammonium sulfate solution in step...

Embodiment 3

[0035] Step 1: Add 90 parts of methacryloxyethyl trimethyl ammonium chloride to 80 parts of distilled water, stir well, and then add 0.1 part of 2,2-azo (2-methylpropyl amidine) Stir the dihydrochloride evenly, then heat the water bath to 50-60℃ for 6-7h while blowing nitrogen for 30-40 minutes;

[0036] Step 2: Take out the reaction product of step 1, wash it with ethanol 3 times, add acetone to dilute it, then put it in an oven at 50-55℃ for 24 hours, dry and pulverize to obtain polymethacryloxyethyl triacetate Methyl ammonium chloride is ready for use;

[0037] Step 3: Take 22 parts of ammonium sulfate and add it to 55 parts of distilled water, fully stir and dissolve to obtain an ammonium sulfate solution;

[0038] Step 4: Add 2.5 parts of acrylamide, 3 parts of methacryloyloxyethyl trimethylammonium chloride, 2.5 parts of acrylic acid, 0.04 parts of 2,2-azo (2-methylpropane Amidine) dihydrochloride, co-crosslinking agent, and dispersant are added to the ammonium sulfate soluti...

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Abstract

The invention relates to a preparation method of hydrophilic acrylamide-based crosslinked polymer microspheres. The method includes the steps of: 1) adding methacryloyloxyethyl trimethyl ammonium chloride into distilled water, then adding 2, 2-azo(2-methylpropylamidine)dihydrochloride, stirring the substances evenly, then introducing nitrogen gas and performing water bath heating; 2) taking out the reactants, first performing washing with ethanol three times, then adding acetone for dilution, then conducting drying in an oven, and performing crushing; 3) adding ammonium sulfate into distilledwater, conducting stirring dissolving to obtain an ammonium sulfate solution; 4) adding acrylamide, DMC, acrylic acid, 2, 2-azo(2-methylpropylamidine)dihydrochloride, a co-crosslinking agent and a dispersant into the ammonium sulfate solution obtained in step 3) in order and performing dissolving; and 5) introducing nitrogen gas into the above solution and performing water bath heating, thus obtaining the hydrophilic acrylamide-based crosslinked polymer microspheres. The method provided by the invention has the characteristics of simple operation, environment-friendly process and wide application range, and solves the problem that micron-sized monodisperse polymer microspheres with hydrophilcity and a cross-linked structure at the same time cannot be obtained in the prior art.

Description

Technical field [0001] The invention relates to the technical field of polymer microsphere preparation, in particular to a preparation method of hydrophilic acrylamide-based cross-linked polymer microspheres. Background technique [0002] Polymer microspheres are a new type of functional material with excellent performance. They have the characteristics of surface effect, volume effect, and functional groups. This makes polymer microspheres widely used in the fields of bioseparation, drug carrier, high-efficiency catalysis, chromatography packing, etc. Applications. The polymer microspheres can be classified according to the type of functional groups introduced into the polymer microspheres and whether they have a cross-linked structure. According to the hydrophilicity of the functional groups, they are divided into hydrophilic and hydrophobic polymer microspheres. The cross-linked structure is divided into linear and cross-linked polymer microspheres. Most of the researches on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/34C08F220/56C08F220/06C08F222/38C08F2/08C08F120/34C09K8/035
CPCC08F2/08C08F120/34C08F220/34C09K8/035C08F220/56C08F220/06C08F222/385
Inventor 张熙杜文浩吴鹏伟陶丹阳
Owner SICHUAN UNIV
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