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Ethylene urea composite nano-material for capturing formaldehyde and preparation method

A technology of composite nanomaterials and inorganic nanomaterials, applied in separation methods, chemical instruments and methods, coatings, etc., can solve the problems of poor ability to capture formaldehyde, low solubility, easy sedimentation and stratification, etc. Hardness and the effect of improving overall performance

Active Publication Date: 2017-01-25
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low solubility of ordinary ethylene urea powder in oily paint and its solvent, easy sedimentation and stratification, and poor ability to capture formaldehyde, the present invention is proposed

Method used

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  • Ethylene urea composite nano-material for capturing formaldehyde and preparation method
  • Ethylene urea composite nano-material for capturing formaldehyde and preparation method
  • Ethylene urea composite nano-material for capturing formaldehyde and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Pour 500 mL of industrial ethanol into the container of the colloid mill, add 300 g of nano-silica with a particle size of 30-150 nm, stir for 1 h, take out the silica paste, and store it in a container for later use.

[0026] Take 20 g of the above silicon dioxide, disperse it evenly in 200 mL of ethanol by ultrasonic, add 20 g of ethylene urea particles, and put it in a water bath at 50 ° C for 20 min to dissolve completely, add 8 mL of dispersant sodium polyacrylate solution (20% ), cooled in an ice bath, stirred, and cooled to below 10°C to obtain a silica-ethylene urea composite nanomaterial with a particle size of 110-140 nm, dried at 70°C for 5 h, taken out, ground, weighed, and set aside.

[0027] The content of ethylene urea is about 45% by thermogravimetric analysis. Take a small amount of the above materials and disperse them into xylene and acetone solvents respectively, and let them stand for a month to observe the dispersion effect, which is uniform as befo...

Embodiment 2

[0030] Pour 500 mL of industrial ethanol into the container of the colloid mill, add 300 g of calcium carbonate powder with a particle size of 50–100 nm, stir for 1 h, take out the calcium carbonate paste, and store it in a container for later use.

[0031] Take 100 g of the above calcium carbonate, ultrasonically disperse it in 1 L of ethanol, add 150 g of ethylene urea particles, and put it in a water bath at 50 ° C for 30 min to dissolve completely, add 8 mL of 1,6-hexanediol diacrylate solution (12%), cooled in an ice bath, stirred, and cooled to below 15°C to obtain calcium carbonate-ethylene urea composite nanomaterials with a particle size of 110-140 nm, dried at 70°C for 5 hours, taken out, ground, weighed, and set aside .

[0032] The content of ethylene urea is about 36% based on the data analyzed by thermogravimetric analyzer. Take a small amount of the above materials and disperse them in xylene and acetone solvent respectively, and let them stand for a month to ob...

Embodiment 3

[0035] Pour 500 mL of industrial ethanol into the container of the colloid mill, add 300 g of titanium dioxide powder with a particle size of 100-200 nm, stir for 1 h, take out the titanium dioxide paste, and store it in a container for later use.

[0036] Take 200 g of the above titanium dioxide, ultrasonically disperse it in 3 L of ethanol, add 400 g of ethylene urea particles, and put it in a water bath at 50 ° C for 20 min to dissolve completely, add 20 mL of polyamide solution (6%), and cool down in an ice bath , stirred, and cooled to below 15°C to obtain a titanium dioxide-ethylene urea composite nanomaterial with a particle size of 170-250nm, dried at 70°C for 5 hours, taken out, ground, weighed, and set aside.

[0037] The content of ethylene urea is about 33% based on the data analyzed by thermogravimetric analyzer. Take a small amount of the above materials and disperse them in xylene and acetone solvent respectively, and let them stand for a month to observe the dis...

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Abstract

The invention discloses an ethylene urea composite nano-material which is added to oil-based paint and has excellent formaldehyde capturing performance, and a preparation method of the ethylene urea composite nano-material. The technical method comprises the following steps: using an organic solvent as a solvent and a dispersion medium of ethylene urea; using silica, calcium carbonate, titanium dioxide, aluminum oxide and other inorganic nanometer materials with a particle size range of 30-500 nm as carriers; adjusting and controlling temperature and solubility of ethylene urea solution, and adding appropriate amount of a dispersion activating agent to prepare the ethylene urea composite nano-material which uses an inorganic nano-material as a core, uses ethylene urea as a shell, and has the particle size range of 50-1000 nm. The ethylene urea composite nano-material can be added to the oil-soluble paint to solve problems that ethylene urea is indissolvable and is easy to settle and stratify, and can be used for coating surfaces of indoor home furnishings made of artificial boards to effectively capture formaldehyde continuously released from the artificial boards, thereby reducing indoor formaldehyde exceeded pollution and protecting human health.

Description

technical field [0001] The invention relates to a ethylene urea composite nano-material added to an oil paint for capturing formaldehyde released from artificial boards and a preparation method thereof, belonging to the technical field of environmental protection and health. Background technique [0002] Formaldehyde is one of the main indoor pollutants that affect human health, mainly related to indoor home furnishing and interior decoration. Since there is a large amount of formaldehyde in the adhesives used in the production of wood-based panels such as fiberboard, particleboard, plywood, and blockboard, the home made of wood-based panels or the decoration made of wood-based panels will last for a long time. Release formaldehyde to the outside, pollute the indoor environment and endanger people's health. The indoor environment is a relatively closed space. When the formaldehyde concentration in the air reaches 0.06~0.07 mg / m³, children will have mild asthma; when the for...

Claims

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Application Information

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IPC IPC(8): C09D7/12B01D53/72
CPCB01D53/72B01D2258/06C09D7/60
Inventor 万平玉张曼金鑫吴云臣刘宁唐阳
Owner BEIJING UNIV OF CHEM TECH
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