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A kind of molybdenum disulfide modified acrylic emulsion and water-based fireproof coating prepared by using the same

A technology of acrylic emulsion and molybdenum disulfide, applied in fireproof coatings, coatings, etc., can solve problems such as inability to use water-based environmentally friendly coatings, harsh reaction conditions and equipment, and difficulty in dispersion, achieve simple and efficient peeling, and improve the waterproofness of emulsions , the effect of expanding the application field

Active Publication Date: 2021-10-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in patent 106750038B, castor oil modified emulsion is used to improve the salt spray resistance and corrosion resistance of coatings, but vacuum dehydration is required to prepare castor oil modified monomers, which is harsh to reaction conditions and equipment; patent CN102174143 B contains fluorine Acrylic emulsion, the solid content after modification is greater than 45%, but it contains fluorine, a halogen element, and cannot be used in water-based environmental protection coatings
Adding inorganic fillers can improve the performance of polymer materials, but the addition of fillers will inevitably lead to problems such as difficulty in dispersion and easy agglomeration

Method used

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  • A kind of molybdenum disulfide modified acrylic emulsion and water-based fireproof coating prepared by using the same
  • A kind of molybdenum disulfide modified acrylic emulsion and water-based fireproof coating prepared by using the same
  • A kind of molybdenum disulfide modified acrylic emulsion and water-based fireproof coating prepared by using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of molybdenum disulfide modified acrylic acid emulsion, its preparation method comprises the steps: take by weighing 1g molybdenum disulfide nano sheet and 7.5g acrylic acid emulsion, under room temperature condition, carry out ultrasonic (120W) treatment 6h under stirring condition (250rpm) and become.

[0050] Wherein, the preparation method of the molybdenum disulfide nanosheets comprises the following steps: ultrasonically disperse 1 g of molybdenum disulfide in 100 ml of deionized water at a temperature of 3° C., and ultrasonically stir for 30 min; dropwise add 62.5 ml of TBA with a concentration of 0.1 mol / L Aqueous solution, add dropwise within 30min, then continue ultrasonic stirring for 2h, disperse evenly to prepare molybdenum disulfide suspension; add 56ml concentrated phosphoric acid (14.5mol / L) dropwise to the molybdenum disulfide suspension, add dropwise within 30min After completion, continue ultrasonic treatment for 2 hours; centrifuge the obtaine...

Embodiment 2

[0058] A molybdenum disulfide modified acrylic acid emulsion, the preparation method of which comprises the steps of: weighing 1g of molybdenum disulfide nano-sheets and 5g of acrylic acid emulsion, under room temperature, under stirring (220rpm) for 8h by ultrasonic (100W) treatment .

[0059] Wherein, the preparation method of the molybdenum disulfide nanosheets comprises the following steps: ultrasonically disperse 2g of molybdenum disulfide in 100ml of deionized water, the reaction temperature is 5°C, and ultrasonically stirred for 45min; dropwise adding 250ml of TBA aqueous solution with a concentration of 0.1mol / L , the dropwise addition is completed within 45min, and then continue to ultrasonically stir for 2h to disperse evenly to obtain a molybdenum disulfide suspension; add 110ml concentrated phosphoric acid (14.5mol / L) dropwise to the molybdenum disulfide suspension, and the dropwise addition is completed within 45min , continue to react for 2h; centrifuge the obtai...

Embodiment 3

[0066] A kind of molybdenum disulfide modified acrylic acid emulsion, its preparation method comprises the steps: take by weighing 1.5g molybdenum disulfide nano sheet and 6g acrylic acid emulsion, under room temperature, carry out ultrasonic (130W) treatment 8h under stirring condition (270rpm) and become.

[0067] Wherein, the preparation method of the molybdenum disulfide nanosheets includes the following steps: ultrasonically disperse 2 g of molybdenum disulfide in 200 ml of deionized water, the reaction temperature is 5 ° C, and ultrasonically stirred for 60 min; dropwise adding 300 ml of TBA aqueous solution with a concentration of 0.1 mol / L , the dropwise addition was completed within 45min, and then continued ultrasonic stirring for 4h to disperse evenly to obtain a molybdenum disulfide suspension; add 120ml concentrated phosphoric acid (14.5mol / L) dropwise to the molybdenum disulfide suspension, and the dropwise addition was completed within 45min , continue to react ...

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Abstract

The invention discloses a molybdenum disulfide modified acrylic emulsion, which is formed by ultrasonic treatment of molybdenum disulfide nanosheets and acrylic emulsion under stirring conditions. The invention utilizes TBA intercalation to peel off the molybdenum disulfide nanosheets, and then further reacts with the acrylic emulsion to prepare the modified acrylic emulsion, which is applied to the water-based fireproof coating, which can exert the barrier effect of the sheet during pyrolysis or combustion, and effectively capture the combustion The free radicals required for the reaction can inhibit the combustion reaction; at the same time, the Mo element in molybdenum disulfide can also be used as a carbon-forming agent when the polymer matrix is ​​burned or degraded, so that the coating has better thermal stability and barrier properties. The fire-resistant and stable properties of the paint are effectively improved; the preparation method involved is simple, the source of raw materials is wide, and it is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of fireproof coatings, and in particular relates to a molybdenum disulfide modified acrylic acid emulsion and a water-based fireproof coating prepared therefrom. Background technique [0002] As one of the representatives of transition metal sulfides in the periodic table, molybdenum disulfide (MoS 2 ) has a typical layered structure, which is stacked by atomic layers of molybdenum and sulfur, and generally exhibits a "sandwich plate" structure. Among them, the metal atoms and the chalcogen atoms in the layer are bonded by strong covalent bonds, while the layers are bonded by weak van der Waals force. As a layered material, nano-molybdenum disulfide has a structure similar to graphene, and has become a research hotspot in recent years due to its potential application value in lubrication, lithium-ion batteries, and optoelectronic devices. MoS 2 It has good thermal stability and can maintain the lamellar s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/00C09D5/18
CPCC08K2003/3009C08K2003/323C08K2201/011C08L2201/02C09D5/185C09D151/003C08L1/284C08K13/06C08K9/04C08K7/00C08K3/30C08K3/32C08K5/053C08K5/34922
Inventor 刘治田刘诗张旗王成
Owner WUHAN INSTITUTE OF TECHNOLOGY
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