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Resistance type fire detection/early-warning sensor and application

A technology of early warning sensor and fire detection, applied in the direction of electric fire alarm, etc., can solve the problems of fire alarm impact, fast spreading speed, poor penetrating ability, etc., achieve low price, simple preparation method, and easy to obtain Effect

Active Publication Date: 2018-06-01
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they also have obvious disadvantages: infrared fire alarms are easily affected by various heat sources and have poor penetrating ability; smoke alarms are mostly used in indoor environments, and the alarm can only be triggered when a large amount of smoke is generated after a fire has broken out for a period of time , it is impossible to timely and effectively detect / early warning before the fire occurs, and the alarm response time after the fire occurs is greater than 100 seconds (Fire Technol., 2000, 36, 89)
However, when flammable materials burn, they spread extremely quickly (the flame spreads to a height greater than 8 meters in about 80 seconds, Fire Safety Journal, 2011, 46, 317), and even causes fatal damage in more than 10 seconds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Soak 25mg of melamine foam in 1mg / ml graphene oxide aqueous solution prepared from graphite, take it out and centrifuge at 3000rpm for 5 minutes, then bake at 80°C for 3h. The experiment was repeated several times until 8 mg of graphene oxide was dip-coated on the melamine foam. Then immerse it in 0.5mg / ml n-octyltriethoxysilane-modified dual-scale (10nm and 200nm) nano-silica (mixed at a mass ratio of 1:1) in tetrahydrofuran dispersion and centrifuge at 3000rpm for 5 minutes, Then bake at 80°C for 3h. This was repeated several times until 67mg of modified superhydrophobic particles were dip-coated on the graphene oxide / melamine foam composite material to obtain a fire detection / early warning composite material 1.

[0031] With dry cell, warning light, the fire detection / early warning composite material 1 that embodiment 1 prepares is connected by wire, as figure 1 As shown, a resistance-type fire detection / early warning sensor 1 is obtained.

Embodiment 2

[0033] Soak 45mg of melamine foam in 1mg / ml graphene oxide aqueous solution made from carbon nanotubes, take it out and centrifuge at 500rpm for 10 minutes, then bake at 80°C for 3h. The experiment was repeated several times until 40 mg of graphene oxide was dip-coated on the melamine foam. Then immerse it in 0.5mg / ml n-octyltriethoxysilane-modified dual-scale (10nm and 200nm) nano-silica (mixed at a mass ratio of 1:1) in tetrahydrofuran dispersion and centrifuge at 500rpm for 10 minutes, Then bake at 80°C for 3h. This was repeated several times until 15 mg of modified superhydrophobic particles were dip-coated on the graphene oxide / melamine foam composite material, a fire detection / warning composite material 2 .

[0034] With dry cell, warning light, the fire detection / early warning composite material 2 that embodiment 2 prepares is connected by wire, as figure 1 As shown, a resistance-type fire detection / early warning sensor 2 is obtained.

Embodiment 3

[0036] Soak 35mg of melamine foam in 1mg / ml graphene oxide aqueous solution made from carbon nanofibers, take it out and centrifuge at 5000rpm for 2 minutes, then bake at 80°C for 3h. The experiment was repeated several times until 24 mg of graphene oxide was dip-coated on the melamine foam. It was then immersed in 0.5 mg / ml n-octyltriethoxysilane-modified dual-scale (25nm and 500nm) nano-titanium dioxide (mixed at a mass ratio of 1:1) in tetrahydrofuran dispersion and centrifuged at 5000rpm for 2 minutes, then 80 Bake at ℃ for 3h. This was repeated several times until 41 mg of modified superhydrophobic particles were dip-coated on the graphene oxide / melamine foam composite material, a fire detection / warning composite material3.

[0037] With dry cell, warning light, the fire detection / early warning composite material 3 that embodiment 3 prepares is connected by wire, as figure 1 As shown, a resistance-type fire detection / early warning sensor 3 is obtained.

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Abstract

The invention relates to the field of functional materials. In order to solve the deficiencies and defects of the traditional infrared fire alarms and smoke alarms in the using process at present, theinvention provides a novel resistance type fire detection / early-warning sensor, which is formed by connecting a low-voltage power supply, a warning lamp, a fire early-warning composite material and aplurality of lead wires in sequence, wherein the fire early-warning composite material is prepared from, by weight, 25-45 parts of melamine foam, 8-40 parts of graphene oxide and 15-67 parts of silicon-containing additive. The process is simple and efficient, and the raw material is low in cost. The invention further provides an application of the resistance type fire detection / early-warning sensor. The resistance type fire detection / early-warning sensor is used for monitoring and preventing various types of combustible materials in a high fire risk region, reducing or even avoiding the occurrence of fires and loss caused by the fires.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a resistance type fire detection / early warning sensor and its application as a fire detection / early warning. Background technique [0002] Combustible materials such as polymers are indispensable materials in people's daily life; in the field of construction; as far as thermoplastic polyurethane rigid foam is concerned, in developed countries such as Western Europe and North America, it has always been the main material for building thermal insulation. However, the combustion of such flammable materials produces fumes containing highly toxic hydrogen cyanide, which can lead to suffocation and death in a short period of time. According to the official WeChat account of the Fire Department of the Ministry of Public Security, in 2016, a total of 312,000 fires were reported across the country, with 1,582 deaths and 1,065 injuries, resulting in direct property losses of 3.72 billio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/06C08J9/40C08L61/28
CPCC08J9/40C08J2361/28G08B17/06
Inventor 汤龙程徐辉张国栋赵丽龚丽秀
Owner HANGZHOU NORMAL UNIVERSITY
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