A high-temperature resistant smart sensing fabric and its preparation method

Abstract

This invention provides a high-temperature resistant smart sensing fabric and its preparation method. The high-temperature resistant smart sensing fabric is made from a smart response material dispersion, a regulator, and a fabric. The smart response material dispersion can be purchased directly or prepared from smart response materials, a dispersant, and a solvent. By adding a regulator, this invention gives the smart response material dispersion suitable surface tension and viscosity, allowing it to be distributed on the fabric surface through printing. It still exhibits good environmental responsiveness in high-temperature environments, effectively improving the high-temperature resistance of the smart sensing fabric. Simultaneously, this smart sensing fabric can sense changes in external temperature, bending deformation, and pressure. Furthermore, the preparation method of this high-temperature resistant smart sensing fabric is simple, and the preparation process generates minimal pollution. Due to its excellent high-temperature resistance, it can be applied in specialized fields such as fire rescue, aerospace, and the petroleum industry, showing broad application prospects.

Description

Technical Field

[0001] This invention relates to smart textiles, specifically to a high-temperature resistant smart sensing fabric and its preparation method. Background Technology

[0002] Intelligent sensing fabrics are undoubtedly an important feature of the future development of textiles and will become a part of people's daily lives. They represent a wide variety of fabrics and clothing, and their intelligence comes from the special components added to the fabrics. These components can be electronic devices, specially constructed polymers, or even colorants.

[0003] Smart sensing fabrics combine sensors, multimedia, and communication technologies with traditional fabrics, giving textiles new functions such as communication, display, and health monitoring. They have broad application prospects in fields such as medicine, sports and fitness, information and entertainment, industry, and the military. However, the operating temperature range of existing smart sensing fabrics is relatively low, usually below 150°C.

[0004] Therefore, its application is limited in some extreme environments, such as fire rescue, aerospace, and the petroleum industry. Summary of the Invention

[0005] Based on the aforementioned technical background, the inventors made pioneering efforts and discovered that: by preparing printing ink using a regulator and a dispersion of smart responsive materials, and then printing it onto the surface of a fabric, the present invention, by adding a regulator to give the printing ink suitable viscosity and surface tension, allows the smart responsive material to be distributed on the fabric surface through printing. The inventors found that, compared with the ordinary impregnation method, the smart responsive fabric prepared by this method still has good environmental responsiveness in high-temperature environments and excellent high-temperature resistance, making it applicable to extreme high-temperature environments. In addition, this high-temperature resistant smart sensing fabric can sense changes in external temperature, bending deformation, and pressure, further expanding its application range, thus completing the present invention.

[0006] The first aspect of the present invention is to provide a high-temperature resistant smart sensing fabric, which is made from a smart response material dispersion, a regulator and a fabric.

[0007] A second aspect of the present invention is to provide a method for preparing the high-temperature resistant intelligent sensing fabric described in the first aspect of the present invention, the method comprising the following steps:

[0008] Step 1: Mix the smart response material dispersion and the regulator to obtain the printing ink;

[0009] Step 2: Print the printing ink obtained in Step 1 onto the fabric, and after drying, obtain a high-temperature resistant smart sensing fabric.

[0010] A third aspect of the present invention is to provide the use of the high-temperature resistant intelligent sensing fabric described in the first aspect of the present invention or the high-temperature resistant intelligent sensing fabric prepared by the preparation method described in the second aspect of the present invention, which can be applied in the fields of fire rescue, aerospace and petroleum industry.

[0011] The high-temperature resistant smart sensing fabric and its preparation method provided by this invention have the following advantages:

[0012] (1) The intelligent sensing fabric can sense changes in external temperature, bending deformation and pressure, and still has good environmental responsiveness at high temperatures;

[0013] (2) This intelligent sensing fabric can be applied in high-temperature environments, and its preparation method is simple, with broad application prospects. Attached Figure Description

[0014] Figure 1 This diagram illustrates the change in resistance of the high-temperature resistant intelligent sensing fabric prepared in Embodiment 1 of the present invention as a function of temperature.

[0015] Figure 2 This diagram illustrates the change in resistance of the high-temperature resistant intelligent sensing fabric prepared in Embodiment 2 of the present invention as a function of bending angle.

[0016] Figure 3 This diagram illustrates the change in resistance of the high-temperature resistant intelligent sensing fabric prepared in Embodiment 3 of the present invention as a function of applied pressure.

[0017] Figure 4 The images shown are of the high-temperature resistant intelligent sensing fabric prepared in Example 3 of the present invention before and after calcination. Detailed Implementation

[0018] The present invention will now be described in detail, and its features and advantages will become clearer and more apparent from these descriptions.

[0019] The first aspect of the present invention is to provide a high-temperature resistant smart sensing fabric, which is made from a smart response material dispersion, a regulator and a fabric.

[0020] The smart response material dispersion can be purchased directly or prepared from smart response materials, dispersants, and solvents.

[0021] The smart responsive material is selected from one or more of carbon nanotubes, graphene, and graphene oxide. The carbon nanotubes are selected from one or more of single-walled carbon nanotubes, carboxylated single-walled carbon nanotubes, hydroxylated single-walled carbon nanotubes, aminated single-walled carbon nanotubes, double-walled carbon nanotubes, carboxylated double-walled carbon nanotubes, hydroxylated double-walled carbon nanotubes, multi-walled carbon nanotubes, carboxylated multi-walled carbon nanotubes, and hydroxylated multi-walled carbon nanotubes. Preferably, it is selected from one or more of single-walled carbon nanotubes, carboxylated single-walled carbon nanotubes, double-walled carbon nanotubes, multi-walled carbon nanotubes, and hydroxylated multi-walled carbon nanotubes. More preferably, it is selected from one or two of single-walled carbon nanotubes and multi-walled carbon nanotubes.

[0022] The graphene is selected from one or more of pyrolytic graphene, carboxylated graphene, aminographene, and mercaptographene, preferably from one or two of pyrolytic graphene and carboxylated graphene, and more preferably from pyrolytic graphene.

[0023] The dispersant is selected from one or more of polyvinyl alcohol, ethyl cellulose, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether phosphate, sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, Triton, silane coupling agent, phthalate coupling agent and graphene dispersant, preferably selected from one or more of polyvinylpyrrolidone, sodium dodecylbenzene sulfonate, silane coupling agent and graphene dispersant, more preferably selected from one or more of sodium dodecylbenzene sulfonate, polyvinylpyrrolidone and graphene dispersant.

[0024] Experiments have shown that the addition of the above-mentioned dispersant can make the smart response material more evenly distributed on the fabric without affecting its response performance and expanding its response range.

[0025] The mass ratio of the dispersant to the smart response material is (0.1-6):1, preferably (0.5-5):1, and more preferably (1-4.5):1.

[0026] The amount of dispersant added affects the dispersion uniformity and responsiveness of smart responsive materials on fabrics. If the amount of dispersant added is too high, the responsiveness of the smart fabric will decrease and the response range will shrink. If the amount of dispersant added is too low, the dispersion uniformity of the smart responsive material on the fabric will decrease, which will also affect the responsiveness of the smart fabric.

[0027] The regulator is selected from one or more of ethylene glycol, 1,2-propanediol, 1,3-butanediol, 1,6-hexanediol and glycerol, preferably from one or more of ethylene glycol, 1,3-butanediol and 1,6-hexanediol, and more preferably from one or two of ethylene glycol and 1,6-hexanediol.

[0028] Adding a regulator to the smart response material dispersion adjusts its viscosity and surface tension, enabling it to be successfully printed on fabrics and improving its high-temperature resistance.

[0029] The mass ratio of the regulator to the smart response material dispersion is 0.05:1 to 0.3:1, preferably 0.07:1 to 0.25:1, and more preferably 0.1:1 to 0.2:1.

[0030] The fabric is selected from one or more of plain weave, twill weave, and satin weave polyester, aramid, quartz, and glass fabrics, preferably from one or more of plain weave, twill weave, and glass fabrics, and more preferably from plain weave or twill weave quartz fabrics.

[0031] The above-mentioned fabric has good high-temperature resistance and good compatibility with smart response materials. The resulting high-temperature resistant smart sensing fabric still has good environmental responsiveness at high temperatures and can be applied to some extreme high-temperature environments.

[0032] The high-temperature resistant intelligent sensing fabric described in this invention can sense changes in external temperature, bending deformation, and pressure. The temperature response range of this intelligent sensing fabric is 0–330°C, the bending deformation response range is 0–90°C, and the pressure response range is 100Pa–7000Pa. This high-temperature resistant intelligent sensing fabric exhibits excellent high-temperature resistance; even after being calcined at 900°C in an oxygen-free environment and then cooled to room temperature, it still retains pressure and bending responsiveness, with a maximum withstand temperature of 900°C.

[0033] A second aspect of the present invention is to provide a method for preparing the high-temperature resistant intelligent sensing fabric described in the first aspect of the present invention, the method comprising the following steps:

[0034] Step 1: Mix the smart response material dispersion and the regulator to obtain the printing ink;

[0035] Step 2: Print the printing ink obtained in Step 1 onto the fabric, and after drying, obtain a high-temperature resistant smart sensing fabric.

[0036] The following is a detailed description and explanation of this step.

[0037] Step 1: Mix the smart response material dispersion and the regulator to obtain the printing ink.

[0038] The preferred mixing method is mechanical stirring, with a stirring time of 10–60 min, preferably 15–45 min, and more preferably 20–30 min.

[0039] The smart response material dispersion can be purchased directly, or it can be prepared by grinding and mixing the smart response material and dispersant, and then mixing them in a solvent for 20-45 minutes.

[0040] The smart response material and dispersant are first ground and mixed. This makes the smart response material more evenly dispersed in the solvent and improves the particle size uniformity of the smart response material, thereby improving the responsiveness of the smart sensing fabric.

[0041] In this invention, the smart responsive material is selected from one or more of carbon nanotubes, graphene, and graphene oxide. The carbon nanotubes are selected from one or more of single-walled carbon nanotubes, carboxylated single-walled carbon nanotubes, hydroxylated single-walled carbon nanotubes, aminated single-walled carbon nanotubes, double-walled carbon nanotubes, carboxylated double-walled carbon nanotubes, hydroxylated double-walled carbon nanotubes, multi-walled carbon nanotubes, carboxylated multi-walled carbon nanotubes, and hydroxylated multi-walled carbon nanotubes. Preferably, it is selected from one or more of single-walled carbon nanotubes, carboxylated single-walled carbon nanotubes, double-walled carbon nanotubes, multi-walled carbon nanotubes, and hydroxylated multi-walled carbon nanotubes. More preferably, it is selected from one or two of single-walled carbon nanotubes and multi-walled carbon nanotubes.

[0042] The graphene is selected from one or more of pyrolytic graphene, carboxylated graphene, aminographene, and mercaptographene, preferably from one or two of pyrolytic graphene and carboxylated graphene, and more preferably from pyrolytic graphene.

[0043] The dispersant is selected from one or more of polyvinyl alcohol, ethyl cellulose, polyvinylpyrrolidone, fatty alcohol polyoxyethylene ether phosphate, sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, Triton, silane coupling agent, phthalate coupling agent and graphene dispersant, preferably selected from one or more of polyvinylpyrrolidone, sodium dodecylbenzene sulfonate, silane coupling agent and graphene dispersant, more preferably selected from one or two of sodium dodecylbenzene sulfonate, polyvinylpyrrolidone and graphene dispersant.

[0044] The mass ratio of the dispersant to the smart response material is (0.1-6):1, preferably (0.5-5):1, and more preferably (1-4.5):1.

[0045] The solvent is selected from one or more of water, ethanol, methanol, acetone and ethylenediamine, preferably from one or more of water, ethanol and ethylenediamine, and more preferably a mixture of water and ethanol.

[0046] Preferably, the volume ratio of water to ethanol is (1-15):1, more preferably (3-12):1, and even more preferably (7-10):1.

[0047] The regulator is selected from one or more of ethylene glycol, 1,2-propanediol, 1,3-butanediol, 1,6-hexanediol, and glycerol, preferably from one or more of ethylene glycol, 1,3-butanediol, and 1,6-hexanediol, and more preferably from one or two of ethylene glycol and 1,6-hexanediol. The regulator can adjust the viscosity, drying speed, and printability of the printing ink, ensuring a smooth printing process.

[0048] The mass concentration of the regulator is 2% to 30%, preferably 5% to 25%.

[0049] The mass ratio of the regulator to the smart response material dispersion is 0.05:1 to 0.3:1, preferably 0.07:1 to 0.25:1, and more preferably 0.1:1 to 0.2:1.

[0050] The concentration of the printing ink is 0.5 to 50 wt%, preferably 1 to 40 wt%, and more preferably 10 to 32 wt%.

[0051] The viscosity of the printing ink is 1–300,000 mPa·s, preferably 2–20 mPa·s and 50–30,000 mPa·s, more preferably 5–10 mPa·s and 100–10,000 mPa·s.

[0052] The surface tension of the printing ink is 20–60 mN / m, preferably 25–55 mN / m, and more preferably 30–50 mN / m.

[0053] The surface tension and viscosity of ink affect the printing effect, which in turn affects the high-temperature resistance of the final high-temperature resistant smart sensing fabric. Printing inks with good printing effect and excellent high-temperature resistance are produced within the above viscosity and surface tension range.

[0054] The inventors have discovered that when the concentration of the printing ink is within the above-mentioned range, the smart response material is uniformly dispersed in the solvent, which is beneficial for the uniform distribution of the smart response material on the fabric after printing, thereby improving the response performance of the smart fabric.

[0055] Step 2: Print the printing ink obtained in Step 1 onto the fabric, and after drying, obtain a high-temperature resistant smart sensing fabric.

[0056] In existing technologies, smart response materials are often loaded onto the surface of fabrics through impregnation. However, impregnation cannot be used to design the structure of smart response devices, limiting their response performance and application areas. The inventors have discovered a smart sensing fabric with excellent high-temperature resistance that can be printed.

[0057] The printing method used is dispensing printing, screen printing, or inkjet printing, with dispensing printing or screen printing being preferred.

[0058] The fabric is selected from one or more of plain weave, twill weave, and satin weave polyester, aramid, quartz, and glass fabrics, preferably from one or more of plain weave, twill weave, and glass fabrics, and more preferably from plain weave or twill weave quartz fabrics.

[0059] The drying temperature is 60–120°C, preferably 70–100°C, and more preferably 80–90°C.

[0060] The drying time is 10-60 min, preferably 20-45 min, and more preferably 30-40 min.

[0061] A third aspect of the present invention is to provide the use of the high-temperature resistant intelligent sensing fabric described in the first aspect of the present invention or the high-temperature resistant intelligent sensing fabric prepared by the preparation method described in the second aspect of the present invention, which can be applied in high-temperature environments, such as fire rescue, aerospace and petroleum industry.

[0062] The beneficial effects of this invention are as follows:

[0063] (1) The high-temperature resistant intelligent sensing fabric of the present invention can sense the external temperature, bending deformation and pressure. Its temperature response range is 0 to 330°, bending deformation response range is 0 to 90°, and pressure response range is 100Pa to 7000Pa.

[0064] (2) The high-temperature resistant intelligent sensing fabric of the present invention has a maximum temperature tolerance of 900℃ in an oxygen-free environment, and has excellent high-temperature resistance.

[0065] (3) The high-temperature resistant intelligent sensing fabric of the present invention adopts dispensing printing, screen printing and inkjet printing processes, which has the advantages of simple preparation method and can realize industrial production.

[0066] Example

[0067] The present invention is further illustrated by specific examples below. These embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0068] Example 1

[0069] Add 20 mL of ethylene glycol to 100 g of a 10 wt% multi-walled carbon nanotube dispersion (XFM05, Nanjing Xianfeng Nanomaterials Technology Co., Ltd.), stir for 30 minutes to prepare a printing ink with a viscosity of 300 mPa·s and a surface tension of 35 mN / m.

[0070] Temperature sensors were printed on the surface of plain quartz fabric using a dispensing printing process. The fabric was then dried in an oven at 80°C for 30 minutes to prepare a high-temperature resistant temperature-sensing smart fabric.

[0071] Example 2

[0072] Add 10 mL of ethylene glycol and 10 mL of water to 100 g of a 10 wt% multi-walled carbon nanotube dispersion (XFM05, Nanjing Xianfeng Nanomaterials Technology Co., Ltd.) and stir for 30 minutes to prepare a printing ink with a viscosity of 210 mPa·s and a surface tension of 45 mN / m.

[0073] A bending deformation sensor was printed on the surface of plain weave quartz fabric using a dispensing printing process. The fabric was then dried in an oven at 80°C for 30 minutes to prepare a high-temperature resistant bending deformation sensing smart fabric.

[0074] Example 3

[0075] Grind and mix 15g of graphene dispersant (M007, Hunan Zhongyan Building Materials Technology Co., Ltd.) and 5g of graphene powder evenly. Add 100mL of water and ethanol mixed solvent (volume ratio of 9:1) and stir for 30 minutes. Then add 20mL of ethylene glycol and stir for 30 minutes to make printing ink. The viscosity of the printing ink is 180mPa·s and the surface tension is 30mN / m.

[0076] Pressure sensors were printed onto the surface of plain-weave quartz fabric using a dispensing printing process. The fabric was then dried in an oven at 80°C for 30 minutes to prepare a high-temperature resistant pressure-sensing smart fabric. Figure 4 As shown in (a), the photograph after calcination at 900℃ for 30 min is as follows. Figure 4 As shown in (b), from Figure 4 As can be seen, its size and shape remained basically unchanged before and after calcination, indicating that the smart fabric has good high-temperature resistance.

[0077] Experimental Example

[0078] Experiment Example 1: Temperature Sensing Performance Test

[0079] The temperature sensing performance of the smart sensing fabric prepared in Example 1 was tested. The smart sensing fabric was placed on a temperature-controlled platform, and a resistance tester was connected to it with wires to test the change in resistance with temperature. The test results are as follows. Figure 1 As shown.

[0080] from Figure 1 As can be seen from the data, the intelligent sensing fabric has temperature sensing performance. After multiple heating and cooling cycles, the intelligent sensing fabric still has good temperature sensing performance, with a temperature response range of 0 to 330℃.

[0081] Experiment Example 2: Bending Deformation Sensing Performance Test

[0082] The bending deformation sensing performance of the smart sensing fabric prepared in Example 2 was tested. The smart sensing fabric was placed on a stepper motor platform, and connected to a resistance tester with wires. The bending angle was controlled by the stepper motor platform, and the change in resistance with the bending angle was tested. The test results are as follows: Figure 2 As shown.

[0083] from Figure 2 As can be seen from the data, the intelligent sensing fabric has bending deformation sensing performance, and its bending deformation response range is 0~90℃.

[0084] Experiment Example 3: Pressure Sensing Performance Test

[0085] The pressure sensing performance of the smart sensing fabric prepared in Example 3 was tested at room temperature and 300°C. The specific test procedure is as follows: At room temperature, the smart sensing fabric prepared in Example 3 was placed on a universal testing machine. The smart sensing fabric was connected to a resistance tester with wires. Different pressures were applied using the universal testing machine, and the change in resistance with pressure was tested. The test results are as follows. Figure 3 As shown.

[0086] The smart sensing fabric was placed in a muffle furnace and heated to 300°C. A wire was used to connect the fabric to a resistance tester, and different pressures were applied using weights to test the change in resistance with pressure. The test results are as follows: Figure 3 As shown.

[0087] Figure 3 In a normal temperature environment, the pressure response range of the intelligent sensing fabric is 100Pa to 7000Pa. In a high temperature environment of 300℃, the intelligent sensing fabric still has pressure sensing performance, with a pressure response range of 100Pa to 7000Pa, which is the same as the pressure response range in the normal temperature environment. This indicates that the intelligent sensing fabric prepared by the present invention has pressure sensing performance and good high temperature resistance.

[0088] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A method for preparing a high-temperature-resistant intelligent sensing fabric, characterized in that, The high-temperature-resistant intelligent sensing fabric is prepared from an intelligent response material dispersion liquid, a regulator and a fabric, and the preparation method comprises the following steps: Step 1, the intelligent response material dispersion liquid and the regulator are mixed to obtain printing ink, the concentration of the printing ink is 1-40 wt%, the viscosity of the printing ink is 100-300 mPa·s, the surface tension of the printing ink is 20-60 mN / m, and the intelligent response material is selected from one or more of carbon nanotubes, graphene and graphene oxide, the regulator is selected from one or more of ethylene glycol, 1,2-propylene glycol, 1,3-butanediol, 1,6-hexanediol and glycerol, the mass ratio of the regulator to the intelligent response material dispersion liquid is 0.05:1-0.3:1; Step 2, the printing ink obtained in step 1 is printed on the fabric, and after drying, a high-temperature-resistant intelligent sensing fabric is obtained, and the printing mode adopted is point gluing printing; the fabric is a plain quartz fabric.

2. The preparation method according to claim 1, characterized in that, the temperature response range of the intelligent sensing fabric is 0-330 DEG C, the bending deformation response range is 0-90 DEG, the pressure response range is 100 Pa-7000 Pa, and the highest tolerance temperature of the intelligent sensing fabric in an oxygen-free environment is 900 DEG C.

3. The preparation method according to claim 1, characterized in that, in step 1, the concentration of the printing ink is 10-32 wt%; the viscosity of the printing ink is 180-300 mPa·s, and the surface tension of the printing ink is 25-55 mN / m.

4. Use of the high-temperature-resistant intelligent sensing fabric prepared by the preparation method in any one of claims 1 to 3 in the fields of fire rescue, aerospace and petroleum industry.

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