Full-color Visualization Humidity Detection Method Based on Intelligent Fabrics

Abstract

The present invention provides a full-color visual humidity detection method based on intelligent fabric, and the method includes: uniformly mixing a cellulose nanocrystal dispersion liquid and an aqueous solution of polyvinyl alcohol according to a predetermined solute mass ratio, and ultrasonically treating until the solution is clarified to obtain a mixed liquid; dropping the mixed liquid onto the surface of a non-woven fabric, performing self-assembly drying, and obtaining an intelligent fabric after the drying is completed; cutting the intelligent fabric to prepare a humidity detection strip; dropping cyclohexane onto the humidity detection strip until the non-woven fabric becomes transparent, and the humidity detection strip can respond and change color according to the change of relative humidity to achieve visual humidity detection. By the above method, the present invention can effectively utilize the mutual synergistic effect among cellulose nanocrystals, polyvinyl alcohol, cyclohexane, and non-woven fabric, and realizes the full-color visual humidity detection of intelligent fabric with a simple process, and has a fast humidity response speed, a wide humidity response range, bright visual colors, and has high practical application value.

Description

Technical Field

[0001] The present invention relates to the technical field of humidity detection, and particularly to a full-color visualization humidity detection method based on intelligent fabric. Background Art

[0002] Too high or too low air humidity will affect human health. With people's attention to a healthy life, humidity control has become increasingly important. In order to effectively adjust the humidity environment, it is very necessary to detect the air humidity. Most of the current humidity detection products on the market are electronic products, and there are few intuitive color visualizations to indicate the humidity environment. Since fabrics are used in all aspects of daily life, if the fabrics worn daily can be combined with color-visualized humidity detection, the environmental humidity can be detected at any time.

[0003] For example, the patent with the publication number CN108314803A provides a chiral nematic cellulose nanocrystal-glycerol composite film and its preparation method and application. By mixing a chiral nematic cellulose nanocrystal dispersion liquid with a glycerol aqueous solution and then forming a film, the obtained chiral nematic cellulose nanocrystal-glycerol composite film not only has excellent optical properties of cellulose nanocrystals but also has the humidity-sensitive property of glycerol, and has a good humidity detection effect as a humidity-sensitive indicator material. However, this method requires preparing corresponding composite film materials. If it is to be applied to existing fabric products, the composite film needs to be further compounded with the fabric products, and humidity detection cannot be directly carried out on the basis of existing fabric products, increasing the application difficulty. At the same time, the time required for the color of the composite film material to change from the initial color to the indicated color corresponding to the humidity is 10 - 20 minutes, and the duration of the indicated color is 3 - 5 minutes, with a slow response to humidity and difficult to meet the requirements of practical applications.

[0004] In view of this, it is necessary to design an improved full-color visualization intelligent humidity detection method to solve the above problems. Summary of the Invention

[0005] Aiming at the defects of the above-mentioned existing technologies, the purpose of the present invention is to provide a full-color visualization humidity detection method based on intelligent fabric, which realizes full-color visualization humidity detection with a relatively fast response speed and a relatively wide response range.

[0006] To achieve the above purpose, the present invention provides a full-color visualization humidity detection method based on intelligent fabric, including the following steps:

[0007] S1. Mix a cellulose nanocrystal dispersion liquid and a polyvinyl alcohol aqueous solution evenly according to a predetermined solute mass ratio, and ultrasonically treat until the solution is clear to obtain a mixed solution;

[0008] S2. Drop the mixture obtained in step S1 onto the surface of the non-woven fabric, perform self-assembly drying, and obtain an intelligent fabric after drying is completed;

[0009] S3. Cut the intelligent fabric obtained in step S2 to prepare a humidity detection strip;

[0010] S4. Drop cyclohexane onto the humidity detection strip obtained in step S3 until the non-woven fabric becomes transparent, and then the humidity detection strip responds and changes color according to the change in relative humidity to achieve visual humidity detection.

[0011] As a further improvement of the present invention, in step S1, the mass ratio of the solutes is 9:1 to 6:4.

[0012] As a further improvement of the present invention, in step S1, the concentration of the cellulose nanocrystal dispersion is 0.3 wt% to 1.5 wt%, preferably 0.8 wt%.

[0013] As a further improvement of the present invention, in step S1, the cellulose nanocrystal dispersion is prepared from pulp board by a sulfuric acid hydrolysis method.

[0014] As a further improvement of the present invention, in step S1, the concentration of the polyvinyl alcohol aqueous solution is 1 wt% to 3 wt%, preferably 2 wt%.

[0015] As a further improvement of the present invention, in step S1, the preparation method of the polyvinyl alcohol aqueous solution is: mix polyvinyl alcohol and pure water, and heat and stir in a water bath at 60 - 80 °C until completely dissolved.

[0016] As a further improvement of the present invention, in step S2, the non-woven fabric is fixed at the bottom of the container, and the mixture is dropped onto the upper surface of the non-woven fabric and a liquid level height of at least 5 mm is formed in the container.

[0017] As a further improvement of the present invention, in step S2, the self-assembly drying method is: at room temperature, let the mixture stand and evaporate on the surface of the non-woven fabric.

[0018] As a further improvement of the present invention, in step S3, the preparation method of the humidity detection strip includes: divide the intelligent fabric cut into a strip shape into a visual response area and a sealed area along the length direction, encapsulate the sealed area, and leave pores as a cyclohexane dropping area when encapsulating the sealed area.

[0019] As a further improvement of the present invention, in step S4, it further includes: preparing a humidity detection colorimetric card for the humidity detection strip according to the color change of the humidity detection strip in a relative humidity environment of 0% to 100%; after comparing the color of the humidity detection strip with the humidity detection colorimetric card, the relative humidity can be measured.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The full-color visual humidity detection method based on intelligent fabric provided by the present invention can prepare a full-color variable-color intelligent fabric including a non-woven fabric layer and a color display layer by uniformly mixing a cellulose nanocrystal dispersion liquid and an aqueous solution of polyvinyl alcohol and then dropping and self-assembling and drying them on the non-woven fabric; on this basis, further dropping cyclohexane onto the intelligent fabric can, on the one hand, make the non-woven fabric layer in the intelligent fabric transparent, improve the light reflection of the color display layer, and make the color change more obvious; on the other hand, the rapid diffusion and volatilization of cyclohexane on the non-woven fabric cause a pressure difference to be formed around the test paper, driving the moisture in the air to gather on the color display side, accelerating the absorption of humidity in the air by the color display layer and triggering a real-time color change reaction, and improving the response speed of the color display layer. Based on the synergistic effect of the above two aspects, the intelligent fabric after dropping cyclohexane can quickly respond to color change under different humidity conditions, realizing full-color visual humidity detection. After cyclohexane and a small amount of moisture have completely volatilized, the sample strip can be used again, and this can be repeated many times without obvious change in the humidity detection effect of the sample strip.

[0022] 2. The full-color visual humidity detection method based on intelligent fabric provided by the present invention can adjust the color of the prepared intelligent fabric itself by controlling the solute mass ratio of the two by mixing a nanocrystal dispersion liquid with a specific concentration and an aqueous solution of polyvinyl alcohol, so as to improve the richness of colors and meet the application requirements under different conditions; at the same time, as a hydrophilic material, polyvinyl alcohol also helps to accelerate the response speed of the color display layer to humidity during the humidity detection process; and polyvinyl alcohol can penetrate into the non-woven fabric layer to a limited extent to form an interfacial bridge layer, effectively enhancing the interfacial bonding force between the color display layer and the non-woven fabric layer, while improving the toughness of cellulose nanocrystals and enhancing the comprehensive performance of the intelligent fabric.

[0023] 3. The full-color visual humidity detection method based on intelligent fabric provided by the present invention effectively utilizes the synergistic effect among cellulose nanocrystals, polyvinyl alcohol, cyclohexane, and non-woven fabric, prepares an intelligent fabric capable of full-color color change with a simple process, and enables it to have a full-color visual humidity detection function, and has a fast humidity response speed, a wide humidity response range, and bright visual colors, and can be applied to humidity detection in daily life, and has broad application prospects in the fields of health monitoring, intelligent textiles, etc. Description of the Drawings

[0024] Figure 1It is a physical picture of the intelligent fabric prepared in Example 1.

[0025] Figure 2 It is a scanning electron microscope image of the cross-section of the intelligent fabric prepared in Example 1.

[0026] Figure 3 It is a schematic structural diagram of the humidity detection strip prepared in Example 1.

[0027] Figure 4 It is a physical picture of the color change of the humidity detection strip prepared in Example 1 under different relative humidity environments.

[0028] Figure 5 It is a schematic diagram of the humidity detection colorimetric card prepared in Example 1.

[0029] Figure 6 It is a comparison chart of the color change before and after dropping cyclohexane on the pure cellulose nanocrystal film in Comparative Example 1 and the non-woven fabric in Comparative Example 2. Detailed implementation manners

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Here, it should also be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, while other details less related to the present invention are omitted.

[0032] In addition, it should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0033] To achieve the above object, the present invention provides a full-color visual humidity detection method based on an intelligent fabric, comprising the following steps:

[0034] S1. Mix the cellulose nanocrystal dispersion liquid and the polyvinyl alcohol aqueous solution evenly according to a predetermined solute mass ratio, and ultrasonically treat until the solution is clarified to obtain a mixed solution;

[0035] S2. Drop the mixed solution obtained in step S1 onto the surface of the non-woven fabric, perform self-assembly drying, and obtain an intelligent fabric after drying is completed;

[0036] S3. Cut the intelligent fabric obtained in step S2 to prepare a humidity detection strip;

[0037] S4. After dropping cyclohexane onto the humidity detection strip obtained in step S3 until the non-woven fabric becomes transparent, the humidity detection strip responds and changes color according to the change in relative humidity, realizing visual humidity detection.

[0038] In the above way, the present invention can effectively utilize the synergistic effect among cellulose nanocrystals, polyvinyl alcohol, cyclohexane, and non-woven fabric. The non-woven fabric becomes transparent due to the refractive index matching between cyclohexane and the non-woven fabric. At the same time, it accelerates the absorption of humidity by cellulose nanocrystals, improves the response speed, and realizes full-color visual humidity detection. Meanwhile, polyvinyl alcohol is used to further improve the response speed of cellulose nanocrystals, enhance the toughness of cellulose nanocrystals and the interfacial bonding force between them and the non-woven fabric, and improve the comprehensive performance of the smart fabric. Among them, the refractive index difference between the used non-woven fabric and cyclohexane should be less than 0.08, and the transparency of the non-woven fabric dropped with cyclohexane can reach more than 95%. Moreover, the smaller this difference is, the higher the transparency is.

[0039] In step S1, the solute mass ratio is 9:1 to 6:4; the concentration of the cellulose nanocrystal dispersion is 0.3 wt% to 1.5 wt%, preferably 0.8 wt%; the concentration of the polyvinyl alcohol aqueous solution is 1 wt% to 3 wt%, preferably 2 wt%.

[0040] Among them, the cellulose nanocrystal dispersion is prepared from pulp board by the sulfuric acid hydrolysis method; the preparation method of the polyvinyl alcohol aqueous solution is: mixing polyvinyl alcohol and pure water, and heating and stirring in a water bath at 60 - 80 °C until completely dissolved.

[0041] In step S2, the non-woven fabric is fixed at the bottom of the container, and the mixed solution is dropped onto the upper surface of the non-woven fabric and forms a liquid level height of at least 5 mm in the container to ensure that a certain amount of cellulose nanocrystals accumulates on the surface of the non-woven fabric; the self-assembly drying method: at room temperature, the mixed solution is allowed to stand and evaporate on the surface of the non-woven fabric.

[0042] In step S3, the preparation method of the humidity detection strip includes: dividing the smart fabric cut into long strips into a visual response area and a sealed area along the length direction, encapsulating the sealed area, and leaving pores as cyclohexane dropping areas when encapsulating the sealed area.

[0043] In step S4, it also includes: preparing a humidity detection colorimetric card for the humidity detection strip according to the color change of the humidity detection strip in a relative humidity environment of 0% - 100%; after comparing the color of the humidity detection strip with the humidity detection colorimetric card, the relative humidity can be measured.

[0044] The following combines specific embodiments to illustrate the full-color visual humidity detection method based on smart fabric provided by the present invention.

[0045] Example 1

[0046] This example provides a full-color visualization humidity detection method based on intelligent fabric, including the following steps:

[0047] S1. Acid-hydrolyze 25 g of pulp board with sulfuric acid at a concentration of 64% to prepare a cellulose nanocrystal dispersion with a mass percentage concentration of 0.8 wt%. Mix polyvinyl alcohol and pure water to make a polyvinyl alcohol with a mass percentage concentration of 2 wt%, and heat and stir it in a water bath at 70 °C until it is completely dissolved to obtain a polyvinyl alcohol aqueous solution. Take 667 μL of the 2 wt% polyvinyl alcohol aqueous solution and add it to 15 mL of the 0.8 wt% cellulose nanocrystal dispersion, so that the solute mass ratio of the cellulose nanocrystal dispersion to the polyvinyl alcohol aqueous solution is 9:1. After ultrasonic treatment with a cell ultrasonic disintegrator at 40% power for 4 min, the solution becomes clear to obtain a mixture.

[0048] S2. Use a disposable plastic petri dish with a diameter of 65 mm as a container. After cutting the non-woven fabric to the same size as the bottom of the container, use double-sided tape to lay the non-woven fabric flat and tightly on the bottom of the container. Then, slowly drop the mixture obtained in step S1 onto the surface of the non-woven fabric and form a liquid level height of 5 mm in the container. Then, place it at room temperature and let the mixture stand and evaporate on the surface of the non-woven fabric for self-assembly drying. After drying is completed, an intelligent fabric is obtained. The physical map and the scanning electron microscope image of the cross-section of the intelligent fabric are respectively as Figure 1 、 Figure 2 shown.

[0049] Among them, Figure 1 is taken in an environment with a relative humidity of 0% (in an oven). After taking it out of the oven and placing it in an environment with different humidities, its color does not change, indicating that when cyclohexane is not dropped, the intelligent fabric does not have a visual wet-responsive color-changing effect.

[0050] According to Figure 2 it can be seen that on the microscopic scale, the intelligent fabric sequentially includes a flexible non-woven fabric layer (Soft NW layer), a polyvinyl alcohol / non-woven fabric composite layer (PVA / NW layer), an interfacial layer, and a cellulose nanocrystal / polyvinyl alcohol composite color-developing layer (CNC / PVA color layer). According to Figure 2 the structure of each layer in

[0051] S3, cutting the smart fabric obtained in step S2 into a rectangular spline of 1 cm×4 cm, and dividing it into a visual response area and a sealing area along the length direction of the spline, wherein the length of the sealing area accounts for about three quarters; wrapping the sealing area of ​​the spline with transparent tape, and leaving a small hole on the transparent tape as a cyclohexane dripping area, so as to obtain a humidity detection strip, the structural schematic diagram of which is shown in FIG. Figure 3 shown.

[0052] S4, adding 4 drops of cyclohexane to the cyclohexane adding area on the humidity detection strip obtained in step S3, and the cyclohexane quickly diffuses to the entire non-woven fabric, making the non-woven fabric transparent, and the humidity detection strip can respond to the change of relative humidity and change color to achieve visual humidity detection.

[0053] In this embodiment, the humidity detection strip is placed under 38%, 48%, 62%, 72%, and 81% conditions for humidity detection, and the following results are obtained: Figure 4 Color change photos shown.

[0054] exist Figure 4 In the figure, the leftmost test strip is a back photo, and the rest are front photos; the leftmost back photo is the state without cyclohexane, and the non-woven fabric is white at this time; after cyclohexane is added to the cyclohexane drop area on the back of the test strip, the visual response area of ​​the humidity test strip changes color after about 30 seconds, showing different colors under different relative humidity environments, and the color difference can be recognized by the naked eye, realizing full-color visual humidity detection. The color presented by the visual response area in different humidity environments can last for about 120 seconds. After the cyclohexane evaporates, the color chromaticity weakens, and repeated addition of cyclohexane can make it recolor. The process is reversible, and cyclohexane can be repeatedly added as needed.

[0055] By further adjusting the relative humidity environment and conducting repeated experiments within the relative humidity range of 0% to 100%, the following results can be obtained: Figure 5 The humidity detection colorimetric card shown can measure the relative humidity by comparing the color of the visual response area on the humidity detection strip with the humidity detection colorimetric card.

[0056] Depend on Figure 5 It can be seen that the humidity detection strip provided in this embodiment has a very wide humidity detection range, and can respond to color changes within the relative humidity range of 0% to 100%, and the color range covers blue, green, yellow, red and transparent, with rich and bright colors that are easy to distinguish with the naked eye.

[0057] As can be seen from the above, the humidity detection strip prepared in this embodiment can achieve full-color visual humidity detection after adding cyclohexane. Moreover, the preparation process and detection process of the humidity detection strip are both simple and easy to implement. The detection process has a fast response speed, a wide response range, and bright visual colors. It can be applied to humidity detection in daily life and has far-reaching application prospects in the fields of health monitoring, intelligent textiles, etc.

[0058] Comparative Examples 1-2

[0059] Comparative Example 1 provides a pure cellulose nanocrystal film, which is prepared by the following method:

[0060] Place 15 mL of a cellulose nanocrystal dispersion with a concentration of 0.8 wt% in a petri dish, let it stand at room temperature, and after it naturally evaporates into a film, cut it according to the size of the humidity detection strip in Example 1.

[0061] This pure cellulose nanocrystal film is blue. When it is placed under different relative humidity conditions, no color change can be observed with the naked eye, and it cannot be used for visual humidity detection.

[0062] Comparative Example 2 is pure non-woven fabric, which is the same as that used in Example 1 and is also cut according to the size of the humidity detection strip in Example 1.

[0063] Drop cyclohexane onto the pure cellulose nanocrystal film provided in Comparative Example 1 and the non-woven fabric provided in Comparative Example 2 respectively, and the color change situation is as Figure 6 shown. As can be seen from a in Figure 6 , after dropping cyclohexane onto the pure cellulose nanocrystal film, its color remains blue and does not become transparent; as can be seen from b in Figure 6 , the non-woven fabric with cyclohexane dropped on it is in a transparent state.

[0064] Further place the pure cellulose nanocrystal film with cyclohexane dropped on it under different humidity conditions. Its color always remains blue and does not change with humidity. Even if the pure cellulose nanocrystal film with cyclohexane dropped on it is attached to a transparent petri dish, no color change can still be observed, and visual humidity detection cannot be achieved.

[0065] Comparative Example 3

[0066] This comparative example provides a full-color visual humidity detection method based on intelligent fabric. Compared with Example 1, the difference is that in step S1, no polyvinyl alcohol aqueous solution is added, and only the cellulose nanocrystal dispersion is dropped onto the surface of the non-woven fabric. An intelligent fabric is prepared by self-assembly drying, and it is made into a humidity detection strip in the same way as in Example 1.

[0067] After dropping cyclohexane onto the humidity detection strip prepared in this comparative example, different colors can be presented in different relative humidity environments after about 42 s, enabling visual humidity detection.

[0068] Compared with Example 1, the humidity response speed of this comparative example is significantly slower, and the absence of polyvinyl alcohol leads to a weakened bonding force between the color-developing layer and the non-woven fabric layer in the humidity detection strip, affecting its actual application effect.

[0069] Examples 2 to 4

[0070] Examples 2 to 4 respectively provide a full-color visual humidity detection method based on smart fabrics. Compared with Example 1, the difference lies in changing the solute mass ratio of the cellulose nanocrystal dispersion and the polyvinyl alcohol aqueous solution in step S1, and the remaining steps are the same as those in Example 1, which will not be elaborated here.

[0071] Among them, the solute mass ratios of the cellulose nanocrystal dispersion and the polyvinyl alcohol aqueous solution in Examples 2 to 4 are 8:2, 7:3, and 6:4 respectively, and the colors of the prepared smart fabrics are green, yellow, and red respectively. These smart fabrics can all respond and change color according to the change of relative humidity after dropping cyclohexane, and their response speed and response range are basically the same as those in Example 1.

[0072] It should be noted that those skilled in the art should understand that in the full-color visual humidity detection method based on smart fabrics provided by the present invention, the concentrations of both the cellulose nanocrystal dispersion and the polyvinyl alcohol aqueous solution can be adjusted within an appropriate range as needed. Among them, the concentration of the cellulose nanocrystal dispersion is preferably 0.3 wt% to 1.5 wt%, and the concentration of the polyvinyl alcohol aqueous solution is preferably 1 wt% to 3 wt%.

[0073] In summary, the full-color visual humidity detection method based on smart fabrics provided by the present invention effectively utilizes the synergistic effect among cellulose nanocrystals, polyvinyl alcohol, cyclohexane, and non-woven fabrics, and thus can achieve the full-color visual humidity detection of smart fabrics with a simple process. If any one of cyclohexane or non-woven fabric is missing, the required visual humidity detection cannot be achieved; if polyvinyl alcohol is missing, although visual humidity detection can still be achieved, the humidity response speed is significantly slower, and the bonding force between the color-developing layer and the non-woven fabric is weak, affecting the actual application effect. Based on this, the method provided by the present invention effectively utilizes the synergistic effect among various substances, and while achieving visual humidity detection, it also has the advantages of fast humidity response speed, wide humidity response range, bright visual color, and a strong bonding force between the color-developing layer and the non-woven fabric layer, which can meet the requirements of actual applications and has high practical application value.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A full-color visual humidity detection method based on intelligent fabric, characterized in that: It includes the following steps: S1. Mix the cellulose nanocrystal dispersion liquid and the polyvinyl alcohol aqueous solution evenly according to a predetermined solute mass ratio, and ultrasonically treat until the solution becomes clear to obtain a mixed solution; S2. Drop the mixed solution obtained in step S1 onto the surface of the non-woven fabric, perform self-assembly drying, and obtain an intelligent fabric after drying is completed; S3. Cut the intelligent fabric obtained in step S2 to prepare a humidity detection strip; S4. Drop cyclohexane onto the humidity detection strip obtained in step S3 until the non-woven fabric becomes transparent, and the humidity detection strip responds and changes color according to the change of relative humidity to achieve visual humidity detection.

2. The full-color visual humidity detection method based on intelligent fabric according to claim 1, characterized in that: In step S1, the solute mass ratio is 9:1 to 6:

4.

3. The full-color visual humidity detection method based on intelligent fabric according to claim 1, characterized in that: In step S1, the concentration of the cellulose nanocrystal dispersion liquid is 0.3 wt% to 1.5 wt%.

4. The full-color visual humidity detection method based on intelligent fabric according to claim 3, characterized in that: In step S1, the concentration of the cellulose nanocrystal dispersion liquid is 0.8 wt%.

5. The full-color visual humidity detection method based on intelligent fabric according to claim 1, characterized in that: In step S1, the cellulose nanocrystal dispersion liquid is prepared from pulp board by a sulfuric acid hydrolysis method.

6. The full-color visual humidity detection method based on intelligent fabric according to claim 1, characterized in that: In step S1, the concentration of the polyvinyl alcohol aqueous solution is 1 wt% to 3 wt%.

7. The full-color visual humidity detection method based on intelligent fabric according to claim 6, characterized in that: In step S1, the concentration of the polyvinyl alcohol aqueous solution is 2 wt%.

8. The full-color visual humidity detection method based on intelligent fabric according to claim 1, characterized in that: In step S1, the preparation method of the polyvinyl alcohol aqueous solution is: mix polyvinyl alcohol and pure water, and heat and stir in a water bath at 60 - 80 °C until completely dissolved.

9. The full-color visual humidity detection method based on intelligent fabric according to claim 1, characterized in that: In step S2, the non-woven fabric is fixed at the bottom of the container, and the mixed solution is dropped onto the upper surface of the non-woven fabric and forms a liquid level height of at least 5 mm in the container.

10. The full-color visual humidity detection method based on intelligent fabric according to claim 1, characterized in that: In step S2, the self-assembly drying method: at room temperature, let the mixed solution stand and evaporate on the surface of the non-woven fabric.

11. The full-color visual humidity detection method based on intelligent fabric according to claim 1, characterized in that: In step S3, the preparation method of the humidity detection strip includes: divide the intelligent fabric cut into a long strip shape into a visual response area and a sealed area along the length direction, encapsulate the sealed area, and leave pores as cyclohexane dropping areas when encapsulating the sealed area.

12. The full-color visual humidity detection method based on intelligent fabric according to claim 1, characterized in that: In step S4, it also includes: prepare a humidity detection colorimetric card for the humidity detection strip according to the color change of the humidity detection strip in a relative humidity environment of 0% - 100%; after comparing the color of the humidity detection strip with the humidity detection colorimetric card, the relative humidity can be measured.

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