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

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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

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

Example Embodiment

[0034] Example 1

[0035] 1) Preparation of the bottom conductive layer: Add 0.8g of silver nanowires and 1.2g of polyvinyl butyral into 98g of ethanol together, stir them for 40min with ultrasonic to disperse them fully, prepare paint A, and then spray paint A on the poly On acrylic and Pinus sylvestris substrate, the coating amount is 0.1mL / cm 2 , And then put it in an oven to dry at 50 ℃ for 10 minutes; the process of spraying and drying was repeated 4 times to obtain the bottom conductive layer with a thickness of about 5 μm;

[0036] 2) Preparation of the middle temperature-sensitive sensing layer: Add 1g of graphene oxide and 1g of carboxymethyl chitosan into 98g of deionized water, stir them with ultrasonic for 60min to fully disperse them, prepare paint B, and then spray paint B on Step 1) On the prepared bottom conductive layer, the coating amount is 0.1mL / cm 2 , Then put it in an oven and dry for 30 minutes at 70°C, and repeat the process of spraying and drying 10 times t...

Example Embodiment

[0041] Example 2

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

Example Embodiment

[0043] Example 3

[0044] The difference between this embodiment and embodiment 1 is that 0.8g silver nanowires are replaced with 0.6g silver nanoparticles in steps 1) and 3), the amount of polyvinyl butyral is reduced to 0.4g, and the amount of ethanol is increased to 99g, the ultrasonic stirring time is shortened to 20min, and the repeating process is increased to 6 times. The test results of vertical burning, fire warning and water resistance are shown in Table 1 and Table 2, and the related 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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