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Porous carbon modified waterborne polyurethane material and preparation method thereof

A technology of water-based polyurethane and porous carbon, which is applied in the direction of chemical instruments and methods, and other chemical processes, can solve the problems of poor thermal performance, mechanical properties and adsorption performance of water-based polyurethane, and achieve improved thermal stability and mechanical properties. The effects of stability and excellent adsorption performance

Inactive Publication Date: 2020-05-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the thermal properties, mechanical properties and adsorption properties of the existing unmodified water-based polyurethane are poor, and functional modification is required to expand its application.

Method used

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  • Porous carbon modified waterborne polyurethane material and preparation method thereof
  • Porous carbon modified waterborne polyurethane material and preparation method thereof
  • Porous carbon modified waterborne polyurethane material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 15.34g of polycaprolactone diol (PCL2000), 6.25g of isophore diisocyanate (IPDI), 1.0g of 2-2 dihydroxymethane into a 250mL three-necked flask equipped with a reflux condenser, a thermometer and an electric stirrer Propionic acid hydrophilic chain extender is dissolved in the solvent, and a small amount of catalyst dibutyltin dilaurate (DBTDL) is added, and the water bath is heated to 80°C for reaction. The reaction time is 2h; then add 0.5g trimethylolpropane , the reaction time is 1h; the temperature of the water bath is lowered to 40°C, then add 0.8g triethylamine, and react for 0.7h; finally add 64.77mL of water, disperse into the polymer under high-speed stirring, the reaction time is 1h, and finally get Waterborne polyurethane prepolymer (WPU).

[0038] Preparation of oxidized porous carbon: put 5g of porous carbon into a beaker, then add 90mL of sulfuric acid and 10mL of phosphoric acid, slowly add 25g of potassium permanganate while stirring in an ice-water ...

Embodiment 2

[0041] Add 14.84g polycaprolactone diol (PCL1000), 6.75g isophore diisocyanate (IPDI), 1.0g dimethylolpropionic acid to a 250mL three-necked flask equipped with a reflux condenser, a thermometer and an electric stirrer The hydrophilic chain extender is dissolved in the solvent, and a small amount of catalyst dibutyltin dilaurate (DBTDL) is added, and the water bath is heated to 75°C for reaction. The reaction time is 1h; then add 0.5g trimethylolpropane, and the reaction time is 2h; the temperature of the water bath was lowered to 40°C, then 0.8g of triethylamine was added, and reacted for 0.5h; finally, 65mL of water was added and dispersed into the polymer under high-speed stirring, and the reaction time was 1h, and finally a water-based polyurethane prepolymer was obtained. body.

[0042] Preparation of oxidized porous carbon: put 3g of porous carbon into a beaker, then add 30mL of sulfuric acid and 10mL of phosphoric acid, slowly add 10g of potassium permanganate while sti...

Embodiment 3

[0045] Add 10.8g of diphenylmethane diisocyanate and 17.5g of polycarbonate diol into a 250mL three-necked flask equipped with a reflux condenser, a thermometer, and an electric stirrer, and then add 3.0g of dimethylol butyric acid to make it hydrophilic The chain extender is dissolved in the solvent, and a small amount of catalyst dibutyltin dilaurate (DBTDL) is added, and the water bath is heated to 85°C for reaction, and the reaction time is 3h; then 0.5g of trimethylolpropane is added, and the reaction time is 1.5h The temperature of the water bath was lowered to 45°C, then 0.86g of triethylamine was added, and reacted for 1h; finally, 84.9mL of water was added, dispersed into the polymer under high-speed stirring, and the reaction time was 1h, and finally a waterborne polyurethane prepolymer was obtained.

[0046] Preparation of oxidized porous carbon: put 10g of porous carbon into a beaker, add 100mL of sulfuric acid and 15mL of phosphoric acid, slowly add 60g of potassiu...

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Abstract

The invention provides a porous carbon modified waterborne polyurethane material and a preparation method thereof. The preparation method comprises the following steps: S1, preparing a waterborne polyurethane prepolymer: mixing polyglycol, diisocyanate and a hydrophilic chain extender, carrying out a heating reaction, then adding a small molecular cross-linking agent, carrying out a heating reaction, then adding an organic alkali, carrying out a reaction, and finally adding water to carry out a reaction so as to obtain the waterborne polyurethane prepolymer; S2, preparing oxidized porous carbon: adding organic acid into the porous carbon, performing stirring, adding potassium permanganate in an ice-water bath, performing stirring for oxidation reaction, adjusting the pH value to be neutral, and performing filtering to obtain the oxidized porous carbon; and S3, preparing a porous carbon modified waterborne polyurethane dispersion liquid: dispersing the oxidized porous carbon in a solvent, carrying out ultrasonic treatment, performing mixing with the waterborne polyurethane prepolymer, stirring, and carrying out reduced pressure distillation to remove the solvent, thereby obtaining the porous carbon modified waterborne polyurethane. The thermal stability, the mechanical property and the adsorption property of the waterborne polyurethane material are improved.

Description

technical field [0001] The invention belongs to the field of modified water-based polyurethane materials, and in particular relates to a porous carbon-modified water-based polyurethane material and a preparation method thereof. Background technique [0002] Water-based polyurethane is a new type of polyurethane system that uses water instead of organic solvents as the dispersion medium, also known as water-dispersed polyurethane, water-based polyurethane or water-based polyurethane. Polymer materials containing urethane groups in the main chain have the advantages of no pollution, safety and reliability, excellent mechanical properties, good compatibility, and easy modification, and are widely used in many fields. Water-based polyurethane materials are mainly used in industries such as light textiles, industrial coatings, building materials, papermaking, and adhesives; they are often used in coatings, leather coatings, fabric coatings, fiber treatment agents, plastic coating...

Claims

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Application Information

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IPC IPC(8): C08L75/06C08L75/08C08L75/04C08K9/02C08K7/24C08G18/75C08G18/76C08G18/73C08G18/66C08G18/42C08G18/44C08G18/48C08G18/32C08G18/34C08G18/12B01J20/26B01J20/30
CPCB01J20/267C08G18/0823C08G18/12C08G18/348C08G18/4277C08G18/44C08G18/4825C08G18/4854C08G18/6659C08G18/6692C08G18/722C08G18/73C08G18/755C08G18/7621C08G18/7671C08K7/24C08K9/02C08L2201/08C08L75/06C08L75/08C08L75/04C08G18/3206
Inventor 赵艳娜薛瑜瑜牛育华林磊
Owner SHAANXI UNIV OF SCI & TECH
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