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A kind of method that uses graphene oxide as an initiator to initiate the polymerization of epoxy monomers

A monomer polymerization and epoxy technology, applied in the field of graphene oxide modification, can solve problems such as poor interface compatibility and complex reaction process, and achieve the effects of improving dispersibility, simplifying the preparation process, and improving the interface effect.

Active Publication Date: 2020-08-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of polymer / graphene composites in the prior art includes two steps of polymer preparation and composite process, the main disadvantage of which is that the reaction process is complicated and the interface compatibility is poor

Method used

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  • A kind of method that uses graphene oxide as an initiator to initiate the polymerization of epoxy monomers
  • A kind of method that uses graphene oxide as an initiator to initiate the polymerization of epoxy monomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of method using graphene oxide as initiator to initiate epoxy monomer polymerization, comprises the steps:

[0036] Step 1: Preparation of Graphene Oxide

[0037] Adopt Hummers method or improved Hummers method to prepare graphene oxide and grind into powder, concrete preparation is as follows:

[0038] (1) Get 10g potassium thiosulfate (K 2 S 2 o 8 ) and 10g phosphorus pentoxide (P 2 o 5 ) was successively added to 50ml of concentrated sulfuric acid (98%) in an oil bath at 80°C, with 0.8 to 1.2 parts of potassium thiosulfate per 1 part of graphite powder, and 0.8 to 1.2 parts of potassium thiosulfate per 1 part of graphite powder. Add graphite powder according to the proportion of phosphorus oxide, and stir magnetically at 80°C for 4.5 hours. After the reaction is completed, wait for the reaction solution to cool to room temperature, add it to 2L of deionized water for dilution, and vacuum filter the reaction solution after standing for more than 12 hours. ...

Embodiment 2

[0048] A kind of method using graphene oxide as initiator to initiate epoxy monomer polymerization, comprises the steps:

[0049] Step 1: Preparation of Graphene Oxide

[0050] Same as Step 1 in Example 1.

[0051] Step 2: Graphene oxide initiates the polymerization of epichlorohydrin

[0052] (1) Add 59mg of graphene oxide into the reaction flask, add 0.32ml of ethylene glycol with a syringe, fully mix with graphene oxide under the action of magnetic stirring, and add 10ml of epichlorohydrin monomer drop by drop Put it into the reaction bottle, after 1h dripping, the temperature is raised to 60°C for reaction, and the reaction time is 48h;

[0053] (2) After the reaction, take 400ml of ether as a precipitant, drop the reaction solution into the precipitant, let it stand for 24 hours, pour off the supernatant, separate the precipitated part and dry it in a vacuum oven to obtain the product.

[0054] (3) Dispersing the obtained product in a tetrahydrofuran solution, centrifu...

Embodiment 3

[0058] A kind of method using graphene oxide as initiator to initiate epoxy monomer polymerization, comprises the steps:

[0059] Step 1: Preparation of Graphene Oxide

[0060] Same as Step 1 in Example 1.

[0061] Step 2: Graphene oxide initiates the polymerization of 3-hydroxypropylene oxide

[0062] (1) Add 55 mg of graphene oxide to the reaction flask, 10 ml of 3-hydroxypropylene oxide, and add it dropwise to the reaction flask. After 1 hour of dripping, the temperature is raised to 40 ° C for reaction. The monomer and graphene oxide are fully mixed, and the reaction time is 24h;

[0063] (2) After the reaction, take 400ml of ether as a precipitant, drop the reaction solution into the precipitant, let it stand for 24 hours, pour off the supernatant, separate the precipitated part and dry it in a vacuum oven to obtain the product.

[0064] (3) Dispersing the obtained product in a tetrahydrofuran solution, centrifuging and washing with tetrahydrofuran repeatedly for 5 tim...

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Abstract

The invention discloses a method for initiating polymerization of an epoxy monomer by using graphene oxide as an initiator. The method comprises the following steps: the epoxy monomer and the graphene oxide are added to a reaction system, wherein, the mass rate of the epoxy monomer to the graphene oxide is 300-5, the graphene oxide can prompt the epoxy monomer to undergo cationic ring-opening polymerization at the temperature of 0-100 DEG C, and the obtained epoxy polymer can be grafted in situ on the surface of a graphene oxide sheet layer, so that surface modification of the graphene oxide is realized, and cation-initiated polymerization and grafting amount are controlled by reaction time and reaction temperature.

Description

technical field [0001] The invention relates to the technical field of ring-opening polymerization of epoxy monomers and the modification of graphene oxide, in particular to a method of initiating the polymerization of epoxy monomers by using graphene oxide as an initiator, so that the epoxy monomers can be grafted in situ A method for modifying graphene oxide by branches on the surface of graphene oxide. Background technique [0002] Graphene is a carbon material with a thickness of one atom. Carbon atoms form a two-dimensional honeycomb lattice structure in a tightly packed manner. The special structural characteristics of graphene endow it with excellent electrical, optical and mechanical properties. , is currently known as the world's highest strength material. Since its discovery in 2004, it has shown broad application prospects in various fields such as chemistry, physics, materials, and electronics. In addition, graphene also has good chemical stability and high mec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C08G65/08C08G65/22
CPCC08G65/08C08G65/223C08G83/001
Inventor 耿建新吴宇黄勇
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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