Modified Mxene/PVA flame-retardant composite material and preparation method thereof

A flame retardant composite material and modification technology, applied in the field of composite materials, can solve problems affecting people's health, mechanical properties and other performance effects, and normal operation of electronic equipment, etc., to achieve a wide range of applications, excellent flame retardant performance, good Effects of Conductive Properties and Electromagnetic Shielding Properties

Pending Publication Date: 2021-05-04
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, usually this requires the addition of a large amount of flame retardants to achieve the ideal flame retardant effect, which has a great impact on the mechanical properties and other properties of the material; at the same time, with the vigorous development of wireless electronic devices, electromagnetic radiation has become a A kind of pollution that cannot be ignored, it not only affects people's health, but also has a certain impact on the normal operation of electronic equipment

Method used

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  • Modified Mxene/PVA flame-retardant composite material and preparation method thereof
  • Modified Mxene/PVA flame-retardant composite material and preparation method thereof
  • Modified Mxene/PVA flame-retardant composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] Add 30mL of hydrochloric acid and 10mL of deionized water into a polytetrafluoroethylene beaker, then add 3.5g of lithium fluoride, stir well at 300r / min for 25min; slowly add 3.5g of titanium aluminum carbide (MAX phase), and then Stir at 400r / min at a constant temperature and react at a constant temperature for 48h at a temperature of °C to obtain a post-reaction solution, wash the post-reaction solution with deionized water until the pH value of the post-reaction solution is neutral, centrifuge at a speed of 3500r / min for 30min, and take The supernatant was used to obtain MXene. Disperse Mxene in deionized water and ultrasonically treat it for 30 minutes to obtain a Mxene dispersion with a mass volume concentration of 2 mg / mL; add 1 g of CTAB to 100 mL of MXene dispersion, and react with magnetic stirring at a speed of 300 r / min for 20 minutes to obtain Mixed solution; use sodium hydroxide to adjust the pH value of the mixed solution to 9.0, and magnetically stir the...

Embodiment 2

[0036] Add 30mL of hydrochloric acid and 10mL of deionized water into a polytetrafluoroethylene beaker, then add 4.5g of lithium fluoride, stir well at 400r / min for 30min, slowly add 4.5g of titanium aluminum carbide (MAX phase), at 55℃ Stir at 600r / min at a constant temperature and react at a constant temperature for 24 hours to obtain a reacted liquid, wash the reacted liquid with deionized water until the pH of the reacted liquid is neutral, centrifuge at a speed of 5000r / min for 10min, and take the Serum, get MXene. Disperse Mxene in deionized water and ultrasonically treat it for 20 minutes to obtain a Mxene dispersion with a mass volume concentration of 2 mg / mL; add 1 g of CTAB to 100 ml of MXene dispersion, and react with magnetic stirring at 200 r / min for 10 minutes to obtain a mixed solution; use sodium hydroxide to adjust the pH of the mixed solution to 9.5, and react with magnetic stirring at 40°C and 200r / min for 8 hours; slowly add 2ml of tetraethyl orthosilicate,...

Embodiment 3

[0038] Add 30mL of hydrochloric acid and 10mL of deionized water into a polytetrafluoroethylene beaker, then add 4.0g of lithium fluoride, stir well at 350r / min for 27min, then slowly add 4.0g of titanium aluminum carbide (MAX phase), at 50℃ Stir and react at a constant temperature at 500r / min under high temperature for 36h to obtain the reacted liquid, wash the reacted liquid with deionized water until the pH value of the reacted liquid is neutral, centrifuge at a speed of 4250r / min for 20min, and take the above Serum, get MXene. Disperse Mxene in deionized water and sonicate for 25 minutes to obtain a Mxene dispersion with a mass volume concentration of 2 mg / ml; add 1 g of CTAB to 100 mL of MXene dispersion solution, and magnetically stir at 250 r / min for 15 minutes to obtain a mixed solution; use sodium hydroxide to adjust the pH value of the mixed solution to 9.25, and react with magnetic stirring at 40°C and 250r / min for 8h; slowly add 2ml of tetraethyl orthosilicate, and...

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Abstract

The invention discloses a modified MXene/PVA flame-retardant composite material and a preparation method thereof, the flame-retardant composite material is formed by compounding a flame-retardant additive and a resin matrix, the resin matrix is polyvinyl alcohol resin, and the flame-retardant additive is modified MXene. The method comprises the steps: dispersing Mxene in deionized water, and carrying out ultrasonic treatment to obtain Mxene dispersion liquid; adding CTAB, and carrying out magnetic stirring reaction to obtain a mixed solution; adjusting the pH value of the mixed solution, carrying out magnetic stirring reaction, adding tetraethoxysilane, and carrying out magnetic stirring reaction to obtain a precipitate; dissolving the precipitate in an ethanol water solution, dropwise adding a silane coupling agent, carrying out magnetic stirring reaction, and washing to obtain modified MXene; dispersing polyvinyl alcohol in deionized water to obtain a polyvinyl alcohol solution; adding modified MXene; and uniformly dispersing and drying to obtain the multifunctional flame-retardant composite material. The composite material has excellent flame retardant property, good conductivity and electromagnetic shielding property, and can be used in the field of building coatings and other coatings.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a flame-retardant composite material, in particular to a multifunctional flame-retardant composite material and a preparation method thereof. Background technique [0002] At present, a large number of combustible or combustible materials are closely related to our production and life. The potential hidden danger of fire is always threatening people's life safety. Using additives to convert combustible materials into flame-retardant materials is a more common method. However, usually this requires the addition of a large amount of flame retardants to achieve the ideal flame retardant effect, which has a great impact on the mechanical properties and other properties of the material; at the same time, with the vigorous development of wireless electronic devices, electromagnetic radiation has become a A kind of pollution that cannot be ignored, it not only affects people's...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K9/06C08K9/04C08K7/26C08K3/14
CPCC08K9/06C08K9/04C08K7/26C08K3/14C08K2201/011C08K2201/001C08L2201/02C08L2201/22C08L29/04
Inventor 王育华宁浩哲马忠英
Owner LANZHOU UNIVERSITY
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