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Graphene oxide sulfonate type waterborne polyurethane composite material and preparation method thereof

A technology of water-based polyurethane and olefin sulfonate, which is applied in the field of composite material preparation, can solve the problems of low heat resistance and achieve high heat resistance and good water dispersibility

Inactive Publication Date: 2014-08-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, water-based polyurethane adhesives generally have the problem of low heat resistance.

Method used

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  • Graphene oxide sulfonate type waterborne polyurethane composite material and preparation method thereof
  • Graphene oxide sulfonate type waterborne polyurethane composite material and preparation method thereof
  • Graphene oxide sulfonate type waterborne polyurethane composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of graphite oxide: In an ice bath, mix 4g of primary graphite powder, 4.8g of sodium nitrate and 160ml of concentrated sulfuric acid, and stir for 15 minutes to ensure thorough mixing, then slowly add 16g of potassium permanganate, and continue in the ice bath The reaction was stirred under conditions for 2 hours. Then it was stirred at room temperature for 36 hours. Slowly add 320ml of distilled water, stir for 15min, then add 320ml of distilled water to dilute, then add 40ml of 30wt% hydrogen peroxide to reduce the remaining potassium permanganate and MnO 2 , and finally the above reaction solution was repeatedly washed with deionized water until neutral, and then dried to obtain graphite oxide.

[0028] 2. Preparation of 1mg / ml graphene oxide aqueous dispersion: Take 0.25g of prepared graphite oxide and add it to 250ml of water, mix and stir evenly, and ultrasonically peel at 30°C for 1 hour to obtain 1mg / ml graphene oxide aqueous dispersion liquid. ...

Embodiment 2

[0031] 1. Preparation of graphite oxide: In an ice bath, mix 5g of primary graphite powder, 4g of sodium nitrate and 225ml of concentrated sulfuric acid, and stir for 20min to ensure thorough mixing, then slowly add 30g of potassium permanganate, and continue to mix in the ice bath The reaction was stirred for 2.5 hours. Then it was stirred at room temperature for 42 hours. Slowly add 450ml of distilled water, stir for 15min, then add 350ml of distilled water to dilute, then add 60ml of 30wt% hydrogen peroxide to reduce the remaining potassium permanganate and MnO 2 , and finally the above reaction solution was repeatedly washed with deionized water until neutral, and then dried to obtain graphite oxide.

[0032] 2. Preparation of 3 mg / ml graphene oxide aqueous dispersion: Take 0.75 g of the prepared graphite oxide and add it to 250 ml of water, mix and stir evenly, and ultrasonically peel at 30° C. for 1.5 hours to obtain a 3 mg / ml graphene oxide aqueous dispersion.

[0033...

Embodiment 3

[0035] 1. Preparation of graphite oxide: In an ice bath, mix 5g of primary graphite powder, 5g of sodium nitrate and 250ml of concentrated sulfuric acid, and stir for 30min to ensure thorough mixing, then slowly add 40g of potassium permanganate, and continue in the ice bath The reaction was stirred for 2.5 hours. Then the ice bath was removed, and stirred at room temperature for 48 hours. Slowly add 500ml of distilled water, stir for 15min, then add 250ml of distilled water to dilute, then add 75ml of 30wt% hydrogen peroxide to reduce the remaining potassium permanganate and MnO 2 , and finally the above reaction solution was repeatedly washed with deionized water until neutral, and then dried to obtain graphite oxide.

[0036] 2. Preparation of 5mg / ml graphene oxide aqueous dispersion: Take 1.25g of the prepared graphite oxide and add it to 250ml of water, mix and stir evenly, and ultrasonically peel at 30°C for 2 hours to obtain a 5mg / ml graphene oxide acetone dispersion. ...

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Abstract

The invention discloses a graphene oxide sulfonate type waterborne polyurethane composite material and a preparation method thereof. The preparation method comprises the following steps of (1) preparing graphite oxide by using an improved Hummers method; (2) dispersing the prepared graphite oxide into water to prepare an aqueous dispersion solution of graphene oxide; and (3) blending the aqueous dispersion solution of graphene oxide and a sulfonate type waterborne polyurethane emulsion to prepare the graphene oxide sulfonate type waterborne polyurethane composite. The two components in the graphene oxide sulfonate type waterborne polyurethane composite material prepared by the invention are relatively good in compatibility; and in addition, the thermal stability of sulfonate type waterborne polyurethane is improved through graphene oxide modification.

Description

technical field [0001] The invention relates to a preparation method of a graphene oxide sulfonate type waterborne polyurethane composite material, belonging to the field of composite material preparation. Background technique [0002] Waterborne polyurethane refers to a binary colloidal system formed by dissolving or dispersing polyurethane resin in water. Water-based polyurethane uses water instead of organic solvents as the dispersion medium. It not only has the advantages of non-toxic, non-flammable, non-polluting, energy-saving and easy to process, but also has excellent mechanical properties, adhesive properties, wear resistance and aging resistance. It has been widely used in industries such as construction, automobile, shoemaking and food packaging. [0003] Usually, by introducing a hydrophilic group into the polyurethane molecule, the polyurethane molecular chain has a certain degree of hydrophilicity, so that it can be dispersed in water to prepare a water-based ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K3/04
Inventor 夏正斌雷亮
Owner SOUTH CHINA UNIV OF TECH
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