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Sandwich structural high-efficiency flame-retardant coating layer with fire warning and super-hydrophobic functions as well as preparation method and application of coating layer

A fire early warning and flame retardant coating technology, applied in the field of flame retardant coatings, can solve the problems of poor water resistance of water-based coatings, low sensitivity of fire early warning systems, inability to apply large-sized materials, etc., and achieve easy control, excellent water resistance and self-cleaning. performance, excellent thermal stability and barrier properties

Active Publication Date: 2019-12-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency flame-retardant coating with sensitive fire warning and super-hydrophobic functions for the problems of flammability of light materials, poor water resistance of water-based coatings, low sensitivity of current fire warning systems, and inability to apply to large-sized materials. Layers and methods of making them

Method used

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  • Sandwich structural high-efficiency flame-retardant coating layer with fire warning and super-hydrophobic functions as well as preparation method and application of coating layer
  • Sandwich structural high-efficiency flame-retardant coating layer with fire warning and super-hydrophobic functions as well as preparation method and application of coating layer
  • Sandwich structural high-efficiency flame-retardant coating layer with fire warning and super-hydrophobic functions as well as preparation method and application of coating layer

Examples

Experimental program
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Effect test

Embodiment 1

[0035]1) Preparation of the bottom conductive layer: Add 0.8g silver nanowires and 1.2g polyvinyl butyral into 98g ethanol, stir them ultrasonically for 40min to fully disperse them, prepare coating A, and then spray coating A on the polyvinyl butyral On acrylic and sylvestris pine substrates, the coating volume is 0.1mL / cm 2 , and then placed in an oven to dry at 50°C for 10 minutes; the process of spraying and drying was repeated 4 times to obtain a bottom conductive layer with a thickness of about 5 μm;

[0036] 2) Preparation of the temperature-sensitive sensing layer in the middle: add 1g graphene oxide and 1g carboxymethyl chitosan to 98g deionized water together, stir them ultrasonically for 60min to fully disperse them, prepare coating B, and then spray coating B on On the bottom conductive layer prepared in step 1), the coating amount is 0.1mL / cm 2 , and then placed in an oven to dry at 70°C for 30 minutes, and the process of spraying and drying was repeated 10 times...

Embodiment 2

[0042] The difference between this embodiment and Example 1 is: in step 1) and step 3), 0.8g silver nanowires are replaced with 1.2g copper nanowires, the polyvinyl butyral consumption is increased to 2.8g, and the ethanol consumption is reduced to 96g, the ultrasonic stirring time was extended to 60min, and the coating amount was reduced to 0.05mL / cm 2 , the drying temperature was increased to 60°C, and the repetition process was reduced to 2 times. The vertical combustion, fire warning and water resistance test results are shown in Table 1 and Table 2, and the relevant test methods are the same as in Example 1.

Embodiment 3

[0044] The difference between this embodiment and Example 1 is: in step 1) and step 3), 0.8g silver nanowires are replaced with 0.6g silver nanoparticles, the polyvinyl butyral consumption is reduced to 0.4g, and the ethanol consumption is increased to 99g, the ultrasonic stirring time was shortened to 20min, and the repetition process was increased to 6 times. The vertical combustion, fire warning and water resistance test results are shown in Table 1 and Table 2, and the relevant test methods are the same as in Example 1.

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Abstract

The invention discloses a sandwich structural high-efficiency flame-retardant coating layer with fire warning and super-hydrophobic functions as well as a preparation method and application of the coating layer. In the preparation method, a bottom electroconductive layer, a middle temperature-sensitive sensing layer, and a top superhydrophobic electroconductive layer are sequentially prepared on aflammable substrate. The bottom electroconductive layer is prepared by the following steps: uniformly dispersing a metal nano material and an oil-soluble long-chain polymer into an organic solvent toform a coating A, spraying the coating A onto the substrate, and performing primary drying; and repeating the processes of spraying and drying for 1-10 times. Compared with the prior art, the flame-retardant coating layer prepared by the invention can show an ultra-sensitive fire warning function and excellent flame-retardant performance even if applied to a large-area substrate; the surface of the coating layer also has super-hydrophobicity, so that the coating layer shows excellent self cleaning and water resistance; and the flame-retardant coating layer prepared by the invention can give reliable fire safety to flammable materials, and can be widely used in the fields of transportation, furniture electrical appliances, building decoration, electric wires and cables and the like.

Description

technical field [0001] The invention relates to flame-retardant coatings, in particular to a sandwich-structured high-efficiency flame-retardant coating with fire warning and super-hydrophobic functions, and a preparation method and application thereof. Background technique [0002] In recent years, fires have occurred frequently around the world. For example, on April 15, 2019, a fire broke out in Notre Dame Cathedral in France due to a short circuit of the wires. The top of the wooden tower was burned in the fire, causing irreparable losses to human civilization; June 2017 In the early hours of the 14th, a major fire occurred in the Grenfell Tower, a 24-story apartment building in London, killing 79 people. This is mainly due to: on the one hand, the widespread use of flammable lightweight materials (such as plastics, rubber, and wood, etc.) has huge fire hazards; 100s, ACS Nano 2017, 12(1), 416-424), often leads to missing the best fire extinguishing and escape time at t...

Claims

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Application Information

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IPC IPC(8): C09D129/14C09D5/24C09D105/08C09D7/61C08J7/04B05D5/12B05D5/00C08L23/12
CPCB05D5/00B05D5/12B05D7/584C08J7/042C08J2323/12C08J2405/08C08J2429/14C08K2201/001C08K2201/011C09D5/24C09D7/61C09D105/08C09D129/14C08K7/06C08K5/5419C08K3/042
Inventor 赖学军谢华理曾幸荣李红强陈嘉韵陈淑嫔
Owner SOUTH CHINA UNIV OF TECH
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