Flexible flame-retardant coating with sensitive temperature sensing and fire early warning functions as well as preparation method and application of flexible flame-retardant coating

A fire warning and flame retardant coating technology, applied in the field of flame retardant coatings, can solve the problems that fire warning flame retardant coatings cannot realize repeatable temperature sensing and fire warning functions, low sensitivity of fire warning system, etc., and achieve sensitive real-time perception Ability, excellent heat insulation and oxygen insulation ability, good adhesion effect

Active Publication Date: 2021-02-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that organic light materials are flammable, the sensitivity of the current fire warning system is low, and the graphene oxide-based thermal resistance response fire warning flame retardant coating cannot realize repeatable temperature sensing and fire warning functions, etc., to provide a Suitable for large-area products, with precise temperature detection function, sensitive detection at low temperature (below 200°C), and reusable flexible flame-retardant coating with sensitive temperature sensing and fire warning functions and preparation method thereof

Method used

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  • Flexible flame-retardant coating with sensitive temperature sensing and fire early warning functions as well as preparation method and application of flexible flame-retardant coating
  • Flexible flame-retardant coating with sensitive temperature sensing and fire early warning functions as well as preparation method and application of flexible flame-retardant coating
  • Flexible flame-retardant coating with sensitive temperature sensing and fire early warning functions as well as preparation method and application of flexible flame-retardant coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Synthesis of thermoelectrically responsive layered nanomaterials: Add 0.1 g of graphene and 150 mL of acetone into a 250 mL four-neck flask, and fully disperse them through mechanical stirring and ultrasonic treatment for 30 min. 0.2 g of 3,4-ethylenedioxythiophene was added, and the reaction temperature was adjusted to 50°C. Dissolve 1 g of ferric chloride in 50 g of acetone by mechanical stirring for 15 min, add it dropwise to the reaction solution within 1 h, and keep stirring for 8 h after the drop is complete. After the reaction, the reaction solution was allowed to stand at room temperature and centrifuged, the precipitate was washed three times with acetone, and dried in an oven at 80° C. for 6 hours to obtain a thermoelectrically responsive layered nanomaterial.

[0037] X-ray photoelectron spectroscopy (XPS) analysis was performed on the functionalized chain-like natural polymer. From figure 1 It can be observed that graphene is composed of 91.1% C and 8.9...

Embodiment 2

[0041] The difference between this example and example 1 is: in step 1), the amount of graphene is increased to 0.5g, acetone is replaced by n-hexane, and the mechanical stirring and ultrasonic treatment dispersion time is extended to 50min; 0.2g 3,4-ethylenedi Oxythiophene was replaced by 0.5g pyrrole, and the reaction temperature was increased to 70°C; 1g ferric chloride was replaced by 3g ammonium persulfate, the dropping time was shortened to 0.5h, and the reaction time was extended to 20h; the drying temperature of the product was reduced to 60°C, and the drying time Extended to 12h; in step 2), polyvinyl alcohol was replaced by hydropropyl methylcellulose, the amount of thermoelectric response layered nanomaterials was increased to 1g, and the time of mechanical stirring and ultrasonic treatment was extended to 30min. The coating amount of each spray on pine wood is reduced to 0.08mL / cm2, the drying temperature is reduced to 80°C, the drying time is extended to 20min, and...

Embodiment 3

[0043] The difference between this embodiment and Example 1 is: in step 1), 0.1g graphene is replaced by 0.05g montmorillonite, acetone is replaced by ethanol, and the mechanical stirring and ultrasonic treatment dispersion time is extended to 360min; 3,4-ethylene The amount of dioxythiophene is increased to 0.5g, and the reaction temperature is increased to 70°C; 1g of ferric chloride is replaced by 2g of ferric nitrate, the dropping time is extended to 2h, and the reaction time is extended to 24h; the drying temperature of the product is reduced to 40°C, and the drying time Extended to 24h; 0.5g polyvinyl alcohol in step 2) was replaced by 0.4g carboxymethyl cellulose, the amount of thermoelectric response layered nanomaterials was increased to 1.6g, and the time of mechanical stirring and ultrasonic treatment was extended to 30min. and Pinus sylvestris wood the coating volume per spray is reduced to 0.02mL / cm 2 , the drying temperature is reduced to 60°C, the drying time is...

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Abstract

The invention discloses a flexible flame-retardant coating with sensitive temperature sensing and fire early warning functions as well as a preparation method and application of the flexible flame-retardant coating. The preparation method comprises the following steps: firstly, synthesizing a thermoelectric response layered nano material through in-situ oxidative polymerization reaction, then mixing and dispersing the thermoelectric response layered nano material and long-chain macromolecules into a solvent to prepare a mixed coating, and then preparing the flexible flame-retardant coating with sensitive temperature sensing and fire early warning functions on a flammable base material through a one-step co-assembly method. Compared with the prior art, the prepared coating has good flexibility and adhesive force, so that the coating has wide applicability and can be applied to various inflammable base materials such as plastic, wood and foam materials through convenient methods such asdip-coating and spray-coating. The coating prepared by the invention is suitable for large-area products, has an accurate temperature detection function, can be sensitively detected at a low temperature (200 DEG C or below), can be repeatedly used, and can be widely applied to the fields of Internet of Things, electrical equipment, transportation and the like with relatively high requirements on fire safety.

Description

technical field [0001] The invention relates to a flame-retardant coating, in particular to a flexible flame-retardant coating with sensitive temperature sensing and fire warning functions, a preparation method and application thereof. Background technique [0002] In recent years, as organic lightweight materials (such as plastics, rubber, fibers, and wood, etc.) , For example, on the afternoon of April 15, 2019, the world-famous Notre Dame de Paris caused a fire due to a short circuit of the wires, and the fire was out of control due to the large number of wooden structures in the building, and eventually the entire building was severely damaged. On the one hand, this is because organic light materials such as the insulating glue layer on the wires and the wooden structure in the building are easy to burn. Once a fire occurs, the flame spreads extremely fast; on the other hand, the early warning response speed of the fire defense system in the building is slow. , When peo...

Claims

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Application Information

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IPC IPC(8): C09D129/04C09D101/28C09D129/14C09D105/08C09D5/18C09D7/61C09D7/65C08J7/05C08J9/36C08L23/12C08L75/04
CPCC09D129/04C09D101/28C09D101/286C09D129/14C09D105/08C09D5/18C09D7/61C09D7/65C08J7/05C08J7/0427C08J9/365C08J2323/12C08J2375/04C08J2429/04C08J2401/28C08J2429/14C08J2405/08C08J2465/00C08J2479/04C08L65/00C08K3/042C08L79/04C08K3/346C08K3/28C08K3/14
Inventor 赖学军谢华理曾幸荣李红强王冰林
Owner SOUTH CHINA UNIV OF TECH
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