A smart fireproof fabric for monitoring fire-causing signals and its preparation method

Abstract

This invention belongs to the field of flexible sensor technology, specifically disclosing a smart fireproof fabric for monitoring fire-causing signals and its preparation method. The smart fireproof fabric for monitoring fire-causing signals of this invention includes a gas-sensitive layer, a flame-retardant dielectric layer, and a temperature-sensitive layer arranged sequentially. The gas-sensitive layer comprises a PCTM gas-sensitive material, and the temperature-sensitive layer comprises a CTM temperature-sensitive material. The PCTM gas-sensitive material and the CTM temperature-sensitive material contain Schottky junctions and PN junctions, effectively improving the sensing sensitivity and range. The sandwich structure design ensures the independence of the sensor and interference-free signal transmission, improving data reliability. Furthermore, this invention has the advantages of simple preparation method and low maintenance cost, showing great application potential in the fields of intelligent fire monitoring, human-computer interaction devices, and intelligent robots.

Description

Technical Field

[0001] This invention relates to the field of flexible sensor technology, and in particular to a smart fireproof fabric for monitoring fire-causing signals and its preparation method. Background Technology

[0002] Accurate fire early warning is crucial for people's lives and property safety. The most commonly used fire alarms are based on detecting single factors such as hazardous gases, smoke particles, or abnormally high temperatures. Due to complex environmental conditions, false alarms are easily generated. Therefore, there is an urgent need to develop intelligent sensing materials that can resist interference from complex environmental factors, thereby effectively reducing the false alarm rate. Fire development generally consists of several stages: incubation period, early stage, development, and sudden burst. In the development and burst stages, open flames have often formed, generating large amounts of heat and toxic fumes, making it extremely difficult to extinguish the flames and for people to escape. Therefore, if the fire threat can be detected in the early stages of fire development, or even during the incubation period, the fire can be controlled immediately, minimizing the damage caused by the fire. During the incubation and early stages of a fire, small amounts of specific, easily detectable trace hazardous signals (such as hazardous gases like ammonia) are mainly produced.

[0003] In recent years, endowing fabrics with fire early warning capabilities has become a promising method to further improve their fire safety. Researchers have utilized the rapid change in output resistance of conductive materials (such as graphene, carbon nanotubes, and MXene) at high temperatures, enabling multifunctional smart sensing fabrics to trigger fire alarm systems within seconds, achieving rapid alarm response. However, despite this, it still only detects a single factor—abnormally high temperatures—and carries the risk of false alarms. Furthermore, the traditional working mode of this smart fireproof fabric requires contact with an open flame to activate, which has certain limitations.

[0004] Therefore, how to provide a smart fireproof fabric for monitoring fire-causing signals and its preparation method, and how to use multiple factors for fire early warning to reduce the risk of false alarms, is an urgent problem to be solved in this field. Summary of the Invention

[0005] In view of this, the present invention provides a smart fireproof fabric for monitoring fire-causing signals and its preparation method. By judging multiple factors, it improves the accuracy of fire early warning and reduces the risk of false fire alarms.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A smart fireproof fabric for monitoring fire-causing signals includes a gas-sensitive layer, a flame-retardant dielectric layer, and a temperature-sensitive layer arranged in sequence.

[0008] The gas-sensitive layer comprises PCTM gas-sensitive material, and the temperature-sensitive layer comprises CTM temperature-sensitive material.

[0009] Preferably, the preparation method of the PCTM gas-sensitive material includes the following steps:

[0010] 1) In-situ self-oxidation reaction of titanium-containing MXene material is carried out to obtain T-MXene;

[0011] 2) T-MXene, aminated CNTs and polyaniline are reacted to obtain PCTM gas-sensitive material.

[0012] Preferably, the temperature of the in-situ auto-oxidation reaction is 50–140°C, and the time of the in-situ auto-oxidation reaction is 12–72 h.

[0013] Preferably, in step 2), the mass ratio of T-MXene, aminated CNTs, and polyaniline is 1:1 to 4:5 to 8, and the reaction time is 1 to 6 hours.

[0014] Preferably, the preparation method of the CTM temperature-sensitive material includes the following steps:

[0015] 1) In-situ self-oxidation reaction of titanium-containing MXene material is carried out to obtain T-MXene;

[0016] 2) React T-MXene and aminated CNTs to obtain CTM temperature-sensitive material.

[0017] Preferably, the temperature of the in-situ auto-oxidation reaction is 50–140°C, and the time of the in-situ auto-oxidation reaction is 12–72 h.

[0018] Preferably, in step 2), the mass ratio of T-MXene to aminated CNTs is 0.5–3:7–9.5, and the reaction time is 1–6 h.

[0019] Preferably, the gas-sensitive layer is prepared by mixing PCTM gas-sensitive material with ink and then printing it onto the surface of flame-retardant polylactic acid fabric.

[0020] The temperature-sensitive layer is prepared by mixing CTM temperature-sensitive material with ink and then printing it onto the surface of flame-retardant polylactic acid fabric.

[0021] The flame-retardant dielectric layer is a flame-retardant polylactic acid fabric.

[0022] Preferably, the mass-to-volume ratio of the PCTM gas-sensitive material to the ink is 10-80 mg: 10 mL, and the mass-to-volume ratio of the CTM temperature-sensitive material to the ink is 10-80 mg: 10 mL.

[0023] Another objective of this invention is to provide a smart fireproof fabric for monitoring fire-causing signals prepared by the above-described preparation method.

[0024] This invention constructs a sandwich-structured smart fireproof textile with multimodal sensing and response functions for gas, smoke, and temperature (the upper layer is a gas-sensitive layer; the middle layer is a flame-retardant dielectric layer; and the lower layer is a temperature-sensitive layer; when worn, the upper layer is the side furthest from the skin, and the lower layer is the side closest to the skin). This product facilitates sensitive, stable, and accurate monitoring and alarm of fire-causing signals, possessing precise fire identification and instantaneous response capabilities for fire hazards. It avoids the problem of ultra-low concentrations of fire-causing signals (such as 5 ppm of ammonia and low concentrations of smoke, far exceeding the detection range of the human nose) going undetected by the wearer, demonstrating significant application potential in the fields of intelligent fire monitoring, human-computer interaction devices, and intelligent robots.

[0025] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Sensitive Monitoring and Interference Resistance: This invention utilizes multimodal sensing fabric to rapidly and accurately monitor various fire-causing signals. The gas-sensitive layer and temperature-sensitive layer contain PCTM gas-sensitive material and CTM temperature-sensitive material. The Schottky junctions and PN junctions formed between T-MXene and aminated CNTs, or between T-MXene, aminated CNTs, and PANi, effectively enhance sensing sensitivity and range. Furthermore, the sandwich structure design ensures sensor independence and interference-free signal transmission, improving data reliability.

[0027] 2. Environmental monitoring and personal protection: The intelligent fireproof fabric described in this invention can be used as a wearable fireproof fabric to provide direct personal protection for the wearer, rather than being limited to environmental monitoring as in traditional fire alarm systems.

[0028] 3. Simple process and low cost: The preparation method of this invention is simple, applicable to existing textile manufacturing technology, and easy to mass-produce. Furthermore, compared with traditional fire alarm systems, this invention has lower manufacturing and maintenance costs, resulting in good economic benefits.

[0029] 4. The intelligent fireproof fabric prepared by this invention can also achieve precise fire location and alarm with the assistance of intelligent Internet of Things (AIoT) and machine learning (ML). When a fire-causing signal is detected, the fabric can instantly activate the alarm system through a wireless communication module for rapid response. It shows great application potential in the fields of intelligent fire monitoring, human-computer interaction devices, and intelligent robots. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 Electron micrographs of the flame-retardant fabric, temperature-sensitive fabric, and gas-sensitive fabric of Embodiment 1 of the present invention;

[0032] Figure 2 This is a graph showing the gas sensing test results of Embodiment 1 of the present invention;

[0033] Figure 3 This is a graph showing the smoke sensing test results of Embodiment 1 of the present invention;

[0034] Figure 4 This is a graph showing the temperature sensing test results of Embodiment 1 of the present invention;

[0035] Figure 5 This is a diagram showing the results of simultaneous multimodal signal detection in Embodiment 1 of the present invention. Figure 5 In the diagram, 'a' represents the gas sensing image. Figure 5 In the diagram, b represents the temperature sensing image. Figure 5 In the diagram, 'c' represents the pressure sensor graph. Figure 5 In this context, d represents a three-layer sensing model;

[0036] Figure 6 This is a schematic diagram of the wireless connection of the present invention. Detailed Implementation

[0037] This invention provides a smart fireproof fabric for monitoring fire-causing signals, comprising a gas-sensitive layer, a flame-retardant dielectric layer, and a temperature-sensitive layer arranged in sequence.

[0038] In this invention, the gas-sensitive layer comprises PCTM gas-sensitive material, and the temperature-sensitive layer comprises CTM temperature-sensitive material.

[0039] In this invention, the preparation method of the PCTM gas-sensitive material includes the following steps:

[0040] 1) In-situ self-oxidation reaction of titanium-containing MXene material is carried out to obtain T-MXene;

[0041] 2) T-MXene, aminated CNTs and polyaniline are reacted to obtain PCTM gas-sensitive material.

[0042] In this invention, the titanium-containing MXene material is preferably Ti3C2T. x Specifically, it can also be Ti2C and Ti3CN.

[0043] In this invention, the temperature of the in-situ auto-oxidation reaction is 50–140°C, specifically 60°C, 70°C, 80°C, 90°C, 100°C, or 120°C; the time of the in-situ auto-oxidation reaction is 12–72 h, specifically 18 h, 24 h, 30 h, 36 h, 42 h, 48 h, 54 h, 60 h, or 66 h.

[0044] In this invention, the mass ratio of T-MXene, aminated CNTs and polyaniline in step 2) is 1:1 to 4:5 to 8, preferably 1:2 to 3:6 to 7, and more preferably 1:2.5:6.5; the reaction time is 1 to 6 hours, specifically 2 hours, 3 hours, 4 hours or 5 hours.

[0045] In this invention, the preferred method for preparing polyaniline is to use classical in-situ microenvironment polymerization technology, specifically: using ammonium persulfate as an initiator and phytic acid as a dopant, polyaniline is obtained by in-situ polymerization of aniline monomers.

[0046] In this invention, the molar ratio of ammonium persulfate, phytic acid and aniline monomer is 1-3:1-3:1-3, preferably 1.5-2.5:1.5-2.5:1.5-2.5, and more preferably 1:1:1.

[0047] In this invention, the in-situ polymerization time is preferably 1 to 8 hours, specifically 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, or 7 hours; the in-situ polymerization temperature is 0 to 40°C, specifically 5°C, 10°C, 20°C, or 30°C, and preferably carried out in an ice-water bath (0°C).

[0048] In this invention, the preparation method of the CTM temperature-sensitive material includes the following steps:

[0049] 1) In-situ self-oxidation reaction of titanium-containing MXene material is carried out to obtain T-MXene;

[0050] 2) React T-MXene and aminated CNTs to obtain CTM temperature-sensitive material.

[0051] In this invention, the temperature of the in-situ auto-oxidation reaction is 50–140°C, specifically 60°C, 70°C, 80°C, 90°C, 100°C, or 120°C; the time of the in-situ auto-oxidation reaction is 12–72 h, specifically 18 h, 24 h, 30 h, 36 h, 42 h, 48 h, 54 h, 60 h, or 66 h.

[0052] In this invention, the mass ratio of T-MXene to aminated CNTs in step 2) is 0.5-3:7-9.5, preferably 1-2:8-9, and more preferably 1.5:8.5; the reaction time is 1-6 hours, specifically 2 hours, 3 hours, 4 hours, or 5 hours.

[0053] In this invention, during the preparation of the PCTM gas-sensitive material and the CTM temperature-sensitive material, the in-situ self-oxidation reaction of the titanium-containing MXene material is preferably carried out in a dispersion.

[0054] In this invention, during the preparation of the PCTM gas-sensitive material and the CTM temperature-sensitive material, the reaction in step 2) is preferably carried out independently in an aqueous dispersion system. The preferred reaction conditions are stirring conditions, with a stirring rate preferably between 100 and 2000 rpm, specifically 200 rpm, 400 rpm, 500 rpm, 600 rpm, 800 rpm, 1000 rpm, 1200 rpm, 1500 rpm, and 1800 rpm, with the most preferred rate being 400 rpm. The reaction involves self-assembly through electrostatic forces, van der Waals forces, and hydrogen bonds.

[0055] In this invention, the gas-sensitive layer is prepared by mixing PCTM gas-sensitive material with ink and then printing it onto the surface of flame-retardant polylactic acid fabric; the temperature-sensitive layer is prepared by mixing CTM temperature-sensitive material with ink and then printing it onto the surface of flame-retardant polylactic acid fabric; and the flame-retardant dielectric layer is made of flame-retardant polylactic acid fabric.

[0056] In this invention, the coating amount of the mixture of PCTM gas-sensitive material and ink in the gas-sensitive layer is 20-25 g / m². 2 Specifically, it can be 21g / m 2 22g / m 2 23g / m 2 24g / m 2 The optimal value is 22.3 g / m 2 The coating amount of the mixture of CTM temperature-sensitive material and ink in the temperature-sensitive layer is 14-16 g / m². 2 Specifically, it can be 14.2g / m 2 14.5g / m 2 14.8g / m 2 15g / m 2 15.2g / m 2 15.5g / m 2 15.8g / m 2 The optimal value is 14.5 g / m 2 .

[0057] The preparation method of flame-retardant polylactic acid (PLA) fabric includes: first, immersing commercially available PLA fabric in N@PFR (APP:PA@FA = 1:2, 15 g / L) flame-retardant finishing solution for 8-15 minutes, and then vertically suspending it for drying to obtain flame-retardant PLA fabric. The bio-based PA@FA flame retardant is synthesized through a green and simple method: a mixture of 2.95 g furfurylamine (Maclean), 4.71 g phytic acid solution (Maclean), and 100 mL deionized water is added sequentially to a beaker and stirred for 30 minutes. Then, a brown powder is obtained by rotary evaporation and dried in a vacuum oven at 80°C for 24 hours to obtain the bio-based PA@FA flame retardant. APP was purchased from Aladdin Company. In the embodiments of this invention, the flame-retardant PLA fabrics were all prepared according to this method (immersion time of 10 minutes), but this is not considered a limitation on the type of flame-retardant PLA fabric.

[0058] In this invention, the printing process is preferably a micro-patterned screen printing technique or an ultra-high-speed precision spraying process.

[0059] In this invention, the printed pattern is preferably dense and continuous, and the printing is preferably done on both sides of the flame-retardant polylactic acid fabric.

[0060] In this invention, the mass-to-volume ratio of the PCTM gas-sensitive material to the ink is 10-80 mg: 10 mL, and the mass-to-volume ratio of the CTM temperature-sensitive material to the ink is 10-80 mg: 10 mL.

[0061] The present invention also provides a smart fireproof fabric for monitoring fire-causing signals prepared by the above preparation method.

[0062] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0063] The embodiments of the present invention use (Ti3C2T) x The preparation method of MXene few-layer dispersions all used MAX phase raw materials (purchased from Jilin 11 Company, YY201701, China). First, 40 mL of HCl (9 mol / L) and 2 g of LiF were added to a polytetrafluoroethylene container to form a low-concentration HF solution. Then, 2 g of MAX powder was added, and the mixture was stirred at 35 °C for 48 h. After the reaction, the mixture was centrifuged at 3500 r / min for 5 min and washed 5 times with deionized water. Finally, the mixture was sonicated in an ice-water bath for 2 h, centrifuged at 3500 r / min for 15 min, and the supernatant dispersion was collected for later use. The above (Ti3C2T) xThe method for preparing MXene few-layer dispersions is not considered a limitation of this invention.

[0064] Example 1

[0065] Take (Ti3C2T) x The MXene few-layer dispersion was heated in an oil bath at 80°C for 36 hours to form TiO2 through in-situ auto-oxidation, thus obtaining a T-MXene dispersion for later use.

[0066] T-MXene dispersion and aminated CNTs dispersion (purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd. XFDZ118) were mixed at a mass ratio of 2:8 (T-MXene: aminated CNTs) and stirred at 400 rpm for 2 h to obtain CTM temperature-sensitive material.

[0067] Using ammonium persulfate as an initiator, phytic acid as a dopant acid, and aniline as a raw material (the molar ratio of ammonium persulfate, phytic acid, and aniline is 1:1:1), the mixture was reacted in an ice-water bath for 2 hours to obtain polyaniline through in-situ polymerization. Then, T-MXene dispersion, aminated CNTs dispersion, and polyaniline (the mass ratio of T-MXene, aminated CNTs, and polyaniline is 1:3:6) were stirred at 400 rpm for 2 hours to obtain PCTM gas-sensitive material.

[0068] CTM temperature-sensitive material and PCTM gas-sensitive material were mixed with printing ink at a ratio of 20 mg / 10 mL, and dense and continuous sensing coatings were printed on both surfaces of different flame-retardant polylactic acid (PLA) fabrics using micro-patterned screen printing technology. (The printing material was the same on both surfaces of the same flame-retardant PLA fabric, and the coating amount of the CTM temperature-sensitive material and printing ink mixture was 15 g / m².) 2 The coating weight of the PCTM gas-sensitive material and printing ink mixture is 22 g / m³. 2 Then, a layer of flame-retardant polylactic acid fabric is placed between the two fabrics to obtain a smart fireproof fabric for monitoring fire-causing signals.

[0069] The SEM images of the flame-retardant dielectric layer (flame-retardant fabric), temperature-sensitive layer (temperature-sensitive fabric), and gas-sensitive layer (gas-sensitive fabric) in this embodiment are as follows: Figure 1 As shown, through Figure 1 It can be seen that after the surface of temperature-sensitive fabrics and gas-sensitive fabrics is treated with micro-patterned screen printing technology, the surface becomes rough, and the original gaps in the fibers are filled with conductive sensing particles, forming a dense and continuous conductive network.

[0070] Example 2

[0071] Take (Ti3C2T) xThe MXene few-layer dispersion was heated in an oil bath at 120°C for 24 hours to form TiO2 through in-situ auto-oxidation, thus obtaining a T-MXene dispersion for later use.

[0072] T-MXene dispersion and aminated CNTs dispersion (purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd. XFDZ118) were mixed at a mass ratio of 1:9 (T-MXene: aminated CNTs) and stirred at 400 rpm for 2 h to obtain CTM temperature-sensitive material.

[0073] Using ammonium persulfate as an initiator, phytic acid as a dopant acid, and aniline as a raw material (the molar ratio of ammonium persulfate, phytic acid, and aniline is 1:1:1), the mixture was reacted in an ice-water bath for 2 hours to obtain polyaniline through in-situ polymerization. Then, T-MXene dispersion, aminated CNTs dispersion, and polyaniline (the mass ratio of T-MXene, aminated CNTs, and polyaniline is 1:1:6) were stirred at 400 rpm for 3 hours to obtain PCTM gas-sensitive material.

[0074] CTM temperature-sensitive material and PCTM gas-sensitive material were mixed with printing ink at a ratio of 20 mg / 10 mL, respectively. Using micro-patterned screen printing technology, dense and continuous sensing coatings were printed on both surfaces of different flame-retardant polylactic acid (PLA) fabrics (the printing material was the same on both surfaces of the same flame-retardant PLA fabric; the coating amount of the CTM temperature-sensitive material and printing ink mixture was 16 g / m²). 2 The coating weight of the PCTM gas-sensitive material and printing ink mixture is 20 g / m². 2 Then, a layer of flame-retardant polylactic acid fabric is placed between the two fabrics to obtain a smart fireproof fabric for monitoring fire-causing signals.

[0075] Example 3

[0076] Take (Ti3C2T) x The MXene few-layer dispersion was heated in an oil bath at 140°C for 12 hours to form TiO2 through in-situ auto-oxidation, thus obtaining a T-MXene dispersion for later use.

[0077] T-MXene dispersion and aminated CNTs dispersion (purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd. XFDZ118) were mixed at a mass ratio of 0.5:9.5 (T-MXene: aminated CNTs) and stirred at 1000 rpm for 4 h to obtain CTM temperature-sensitive material.

[0078] Using ammonium persulfate as an initiator, phytic acid as a dopant acid, and aniline as a raw material (the molar ratio of ammonium persulfate, phytic acid, and aniline is 1:1:1), the mixture was reacted in an ice-water bath for 2 hours to obtain polyaniline through in-situ polymerization. Then, T-MXene dispersion, aminated CNTs dispersion, and polyaniline (the mass ratio of T-MXene, aminated CNTs, and polyaniline is 1:4:8) were stirred at 400 rpm for 4 hours to obtain PCTM gas-sensitive material.

[0079] CTM temperature-sensitive material and PCTM gas-sensitive material were mixed with printing ink at a ratio of 20 mg / 10 mL, respectively. Using micro-patterned screen printing technology, dense and continuous sensing coatings were printed on both surfaces of different flame-retardant polylactic acid (PLA) fabrics (the printing material was the same on both surfaces of the same flame-retardant PLA fabric; the coating amount of the CTM temperature-sensitive material and printing ink mixture was 14 g / m²). 2 The coating weight of the PCTM gas-sensitive material and printing ink mixture is 25 g / m². 2 Then, a layer of flame-retardant polylactic acid fabric is placed between the two fabrics to obtain a smart fireproof fabric for monitoring fire-causing signals.

[0080] Example 4

[0081] Take (Ti3C2T) x The MXene few-layer dispersion was heated in an oil bath at 50°C for 72 hours to form TiO2 through in-situ auto-oxidation, thus obtaining a T-MXene dispersion for later use.

[0082] T-MXene dispersion and aminated CNTs dispersion (purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd. XFDZ118) were mixed at a mass ratio of 3:7 (T-MXene: aminated CNTs) and stirred at 400 rpm for 6 h to obtain CTM temperature-sensitive material.

[0083] Using ammonium persulfate as an initiator, phytic acid as a dopant acid, and aniline as a raw material (the molar ratio of ammonium persulfate, phytic acid, and aniline is 1:1:1), the mixture was reacted in an ice-water bath for 2 hours to obtain polyaniline through in-situ polymerization. Then, T-MXene dispersion, aminated CNTs dispersion, and polyaniline (the mass ratio of T-MXene, aminated CNTs, and polyaniline is 1:2:5) were stirred at 600 rpm for 6 hours to obtain PCTM gas-sensitive material.

[0084] CTM temperature-sensitive material and PCTM gas-sensitive material were mixed with printing ink at a ratio of 20 mg / 10 mL, and dense and continuous sensing coatings were printed on both surfaces of different flame-retardant polylactic acid (PLA) fabrics using micro-patterned screen printing technology. (The printing material was the same on both surfaces of the same flame-retardant PLA fabric, and the coating amount of the CTM temperature-sensitive material and printing ink mixture was 15 g / m².) 2 The coating weight of the PCTM gas-sensitive material and printing ink mixture is 24 g / m². 2 Then, a layer of flame-retardant polylactic acid fabric is placed between the two fabrics to obtain a smart fireproof fabric for monitoring fire-causing signals.

[0085] Experimental Example 1

[0086] Gas sensing tests were conducted on the fire-causing signal monitoring smart fireproof fabric prepared in Example 1. Specifically, the test sample was placed in a sealed chamber, and then ammonia gas of different concentrations (0 ppm, 50 ppm, 100 ppm, 150 ppm, and 200 ppm) was introduced into the chamber, and the resistance of the sample was measured. The test results are as follows: Figure 2 As shown, through Figure 2 It can be seen that the gas-sensitive material undergoes chemical doping changes with ammonia gas, and the resistance of the sample increases sequentially, exhibiting a good linear relationship.

[0087] The fire-causing signal monitoring smart fireproof fabric prepared in Example 1 was subjected to smoke sensing tests. Specifically, the test sample was placed in a sealed chamber and then subjected to smoke sensing at 200 μg / m³. 3 Under the specified smoke concentration, the electrical signal changes of the cyclically tested samples were analyzed, and the test results are as follows: Figure 3 As shown, it exhibits satisfactory consistency.

[0088] Temperature tests were conducted on the fire-causing signal monitoring smart fireproof fabric prepared in Example 1. Specifically, the test sample was placed on a hot plate and heated at one end. Due to the Seebeck effect, the temperature difference caused the movement of directional electrons, forming an electric current and thus generating a thermoelectric voltage. We set up five cycles of low and high temperatures, and the test results are as follows. Figure 4 As shown, the test sample exhibits good cycle consistency and no signal drift in the five heating-cooling cycles.

[0089] The smart fireproof fabric for monitoring fire-causing signals prepared in Example 1 was subjected to simultaneous detection of multimodal signals, and the results are as follows: Figure 5 As shown, through Figure 5 It can be seen that it has good signal response capability and does not interfere with each other.

[0090] Wireless connection diagram as shown Figure 6As shown, by simultaneously detecting and processing signals of gas, smoke, and temperature, the signals are input into a micro central processor for judgment. If there is a fire hazard, an alarm signal is sent to a designated mobile phone number or email address via mobile phone or computer.

[0091] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0092] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing a fire hazard signal monitoring intelligent fireproof fabric, characterized in that, The gas sensitive layer, the flame-retardant dielectric layer and the temperature sensitive layer are sequentially arranged; The gas sensitive layer comprises PCTM gas sensitive material, and the temperature sensitive layer comprises CTM temperature sensitive material; The preparation method of the PCTM gas sensitive material comprises the following steps: 1) performing in-situ self-oxidation reaction on a titanium-containing MXene material to obtain T-MXene; 2) reacting the T-MXene, aminated CNTs and polyaniline to obtain the PCTM gas sensitive material; The temperature of the in-situ self-oxidation reaction in the step 1) is 50-140℃, and the time of the in-situ self-oxidation reaction is 12-72h; The mass ratio of the T-MXene, the aminated CNTs and the polyaniline in the step 2) is 1:1-4:5-8, and the reaction time is 1-6h; The preparation method of the CTM temperature sensitive material comprises the following steps: a) performing in-situ self-oxidation reaction on a titanium-containing MXene material to obtain T-MXene; b) reacting the T-MXene and aminated CNTs to obtain the CTM temperature sensitive material; The temperature of the in-situ self-oxidation reaction in the step a) is 50-140℃, and the time of the in-situ self-oxidation reaction is 12-72h; The mass ratio of the T-MXene and the aminated CNTs in the step b) is 0.5-3:7-9.5, and the reaction time is 1-6h.

2. The method for preparing a fire hazard signal monitoring intelligent fireproof fabric according to claim 1, characterized in that, The preparation method of the gas sensitive layer is that the PCTM gas sensitive material is mixed with ink and then printed on the surface of the flame-retardant polylactic acid fabric; The preparation method of the temperature sensitive layer is that the CTM temperature sensitive material is mixed with ink and then printed on the surface of the flame-retardant polylactic acid fabric; The flame-retardant dielectric layer is a flame-retardant polylactic acid fabric.

3. The method for preparing a fire hazard signal monitoring intelligent fireproof fabric according to claim 2, characterized in that, The mass-volume ratio of the PCTM gas sensitive material and the ink is 10-80mg:10mL, and the mass-volume ratio of the CTM temperature sensitive material and the ink is 10-80mg:10mL.

4. The fire disaster signal monitoring intelligent fireproof fabric prepared by the preparation method in any one of claims 1-3.

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