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Preparation method of graphene modified polyurethane composite material

A technology of graphene modification and composite materials, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems such as low strength, poor water resistance, and poor erosion resistance, and achieve good erosion resistance and water resistance Enhanced water resistance and corrosion resistance

Inactive Publication Date: 2020-09-11
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, although polyurethane itself has many excellent properties, such as low temperature resistance, wear resistance, etc., there are also many shortcomings, such as poor water resistance, poor erosion resistance, low strength, etc., in order to improve these shortcomings and obtain more usable performance More excellent materials to meet our requirements

Method used

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  • Preparation method of graphene modified polyurethane composite material

Examples

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Effect test

Embodiment 1

[0033] A kind of preparation method of graphene modified polyurethane composite material, comprises the steps:

[0034] One, the preparation of graphene oxide:

[0035] (1) Add 200ml of 98% concentrated sulfuric acid and 5g of sodium nitrate into a dry beaker, and cool it to 5°C with ice water, then add 5g of graphite powder and 30g of potassium permanganate into the beaker and stir for 2 hours (note that adding Slowly add potassium permanganate and control the temperature of the reaction system not to exceed 15°C), after the stirring is completed, the temperature is raised to 35°C and reacted for 2 hours, after the reaction is completed, add 1000ml deionized water and stir for 30 minutes (when adding deionized water Pay attention to control the temperature between 90-98°C);

[0036] (2) then add 20ml hydrogen peroxide solution (wherein the massfraction of hydrogen peroxide is 30%) in the reaction system of step (1), and filter while hot, then wash the filter product with the...

Embodiment 2

[0044] A kind of preparation method of graphene modified polyurethane composite material, comprises the steps:

[0045] One, the preparation of graphene oxide:

[0046] (1) Add 200ml of 98% concentrated sulfuric acid and 8g of sodium nitrate into a dry beaker, and cool to 10°C with ice water, then add 8g of graphite powder and 64g of potassium permanganate into the beaker and stir for 1 hour (note that adding Slowly add potassium permanganate and control the temperature of the reaction system not to exceed 15°C), after the stirring is completed, the temperature is raised to 30°C and reacted for 3 hours, after the reaction is completed, add 1500ml deionized water and stir for 30 minutes (when adding deionized water Pay attention to control the temperature between 90-98°C);

[0047] (2) then add 23ml hydrogen peroxide solution (wherein the massfraction of hydrogen peroxide is 30%) in the reaction system of step (1), and filter while hot, then wash with the hydrochloric acid of co...

Embodiment 3

[0055] A kind of preparation method of graphene modified polyurethane composite material, comprises the steps:

[0056] One, the preparation of graphene oxide:

[0057] (1) Add 200ml of 98% concentrated sulfuric acid and 10g of sodium nitrate into a dry beaker, and cool to 7°C with ice water, then add 10g of graphite powder and 50g of potassium permanganate into the beaker and stir for 3 hours (note that adding Slowly add potassium permanganate and control the temperature of the reaction system not to exceed 15°C), after the stirring is completed, the temperature is raised to 40°C and reacted for 1 hour, after the reaction is completed, add 2000ml deionized water and stir for 30 minutes (when adding deionized water Pay attention to control the temperature between 90-98°C);

[0058] (2) then add 25ml hydrogen peroxide solution (wherein the massfraction of hydrogen peroxide is 30%) in the reaction system of step (1), and filter while hot, then wash with the hydrochloric acid of...

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Abstract

The invention discloses a preparation method of a graphene modified polyurethane composite material. The preparation method comprises the following steps of: (1) oxidizing graphite serving as a raw material to obtain graphene oxide; (2) modifying the obtained graphene oxide through a reducing agent and hydrochloric acid to obtain modified graphene oxide; and (3) ultrasonically dispersing the modified graphene oxide into deionized water, adding a photoinitiator, and performing curing in a photocuring machine to obtain a graphene-polyurethane composite material. The preparation method disclosedby the invention is simple, the problem of internal stress concentration of the composite material caused by secondary agglomeration generated by Van der Waals' force between graphene and polyurethaneis solved by modifying graphene, and the strength is improved. The modified graphene oxide has a good reinforcing effect on polyurethane, and the prepared graphene-polyurethane composite material isexcellent in performance and good in water resistance and erosion wear resistance.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a method for preparing a graphene-modified polyurethane composite material. Background technique [0002] Since graphene was discovered in 2004, the application of graphene has become more and more extensive. The emergence of nanomaterials provides new ideas and methods for the preparation of high-performance polymer composites. The excellent physical, chemical and mechanical properties of graphene have become a good modifier for the preparation of nanocomposites. However, many properties of graphene are still to be studied, such as superconductivity, magnetism, etc. Therefore, there are still many challenges in the performance and application of polymer nanocomposites prepared by graphene modification. [0003] At present, the research on the synthesis of graphene nanocomposites and its related applications has made great progress, but there are still many problems and challe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K9/02C08K3/04C01B32/198
CPCC08K9/02C08K3/042C01B32/198C08L75/04
Inventor 刘丹倪庆婷王欣施志展
Owner JIANGSU UNIV OF TECH
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