Preparation method of photoelectric dual-signal response structural color fabric

Abstract

The application discloses a preparation method of photoelectric dual-signal response structural color fabric, and relates to the technical field of textile processing. The method comprises the following steps: S1, synthesis of PS@SiO2 colloidal microspheres, wherein PS@SiO2 represents polystyrene coated with silicon dioxide; S2, preparation of PS@SiO2 liquid photonic crystal; S3, preparation of Mxene dispersion liquid; and S4, preparation of photoelectric dual-signal response structural color fabric, which comprises the following steps: S4.1, preparation of elastic solid photonic crystal PS@SiO2 SPCs film; S4.2, preparation of conductive elastic knitted fabric M-Fabric; and S4.3, combination of the PS@SiO2 SPCs and the M-Fabric together under the adhesive action of water-based polyacrylate WPA, so as to obtain the structural color fabric M-Fabric@SPCs with photoelectric dual-signal response.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile processing, in particular to a preparation method of a photoelectric dual-signal response structural color fabric. BACKGROUND

[0002] Photonic crystal (PCs) coated fabrics not only present bright structural colors, but also exhibit good color fastness due to the role of adhesive / encapsulant. This nature-inspired structural color endows textiles with new color definition, but the color of these structural color fabrics is usually constant (at the same observation angle). If the color of the structural color fabric can change with the movement of the body, it can further promote the application of PCs materials in smart textile materials.

[0003] Chameleons are a kind of reptiles with the skill of actively adjusting their skin color. The principle of color change is to realize the change of skin color by adjusting the lattice spacing of guanine nanocrystals in the thick layer of dermal iris. The color change mechanism is closely related to the structural color of PCs. Non-dense PCs are a kind of PCs materials simulating the skin of chameleons. The structure has the same optical properties as dense PCs, but the difference is that the microspheres in non-dense PCs are in a non-contact state, and the microspheres are connected by a certain substance and still maintain an ordered arrangement structure. If the filling material is an elastomer, a flexible force-induced color-changing structural color film can be prepared. For example, Hu et al. obtained non-dense PCs by using SiO2 microspheres as units and DEGEEA as filling material. Benefiting from the elasticity of PDEGEEA, the non-dense PCs film exhibits good force-induced color-changing effect. If the filling material also has conductivity, a photoelectric dual-signal response photonic skin can also be obtained. A hydrogel-based optoelectronic skin with photoelectric interactive sensing properties is prepared by using PS@SiO2 microspheres as units, which provides valuable reference for visual electronic interactive devices and intelligent wearable systems. In recent years, flexible wearable devices based on textiles have received extensive attention. Textiles, as a necessity of people's life, have become one of the preferred substrates for wearable devices due to their good air permeability, flexibility and low cost. If non-dense PCs are combined with conductive fabrics, a functional structural color fabric with photo signal and electrical signal response can be obtained, but there is a problem of poor color brightness. SUMMARY

[0004] The present application provides a preparation method of a photoelectric dual-signal response structural color fabric, which solves the problem of poor color brightness of the functional structural color fabric with photo signal and electrical signal response.

[0005] According to an aspect of the present disclosure, a preparation method of a photoelectric dual-signal response structural color fabric is provided, the method comprising:

[0006] S1: Synthesis of PS@SiO2 colloidal microspheres, PS@SiO2 represents silica-coated polystyrene;

[0007] S2: Preparation of PS@SiO2 liquid photonic crystal;

[0008] S3: Preparation of Mxene dispersion;

[0009] S4: Preparation of structural color fabric with photoelectric dual signal response, including:

[0010] Preparation of elastic solid photonic crystal PS@SiO2 SPCs film: 30 μL of liquid photonic crystal PS@SiO2 LPCs-MEA was injected into the space between two glass slides with a spacing of 0.1 mm, and the glass slides were placed directly under the ultraviolet lamp for irradiation for 30 s to obtain an elastic SPCs film with bright structural color, i.e. PS@SiO2 SPCs,

[0011] Preparation of conductive elastic knitted fabric: white elastic knitted fabric was added to a solution containing 10 g / L NaOH aqueous solution, soaked at a temperature of 95 ℃ for 1 hour, then rinsed with deionized water, and finally dried in an oven at 60 ℃ for 1 hour; the dried elastic knitted fabric was immersed in the Mxene dispersion for 5 minutes, then dried in an oven at 60 ℃ for 20 minutes, and the Mxene-loaded conductive elastic knitted fabric was obtained after three cycles of immersion, denoted as M-Fabric;

[0012] The PS@SiO2 SPCs and the M-Fabric were combined together under the adhesion of the aqueous polyacrylate WPA to obtain a structural color fabric M-Fabric@SPCs with photoelectric dual signal response.

[0013] In a possible implementation, the S1 includes:

[0014] Step S101: 60 mL of polystyrene PS emulsion and 300 mL of deionized water were added to a single-neck flask, and the PS microspheres were uniformly dispersed in the deionized water by ultrasonic vibration for 10 minutes;

[0015] Step S102: 24 mL of ammonia water was added to the flask at a rotation speed of 500 revolutions per minute, and magnetic stirring was performed for 10 minutes,

[0016] Step S103: vinyltriethoxysilane VTES was slowly added dropwise to the flask, and the reaction was carried out at a temperature of 30 ℃ for 20 hours to obtain a PS@SiO2 colloidal microsphere dispersion;

[0017] Step S104: the PS@SiO2 colloidal microsphere dispersion was washed by centrifugation with anhydrous ethanol for 3 times, and finally the precipitate was dispersed in anhydrous ethanol for storage.

[0018] In a possible implementation, the S2 comprises:

[0019] S202, configuration of the prepolymer:

[0020] 1 mL of 2-methacrylic acid-2-methoxyethyl ester M EA, 20 μL of polyethylene glycol diacrylate PEGDA and 5 μL of 2-hydroxy-2-methylpropiophenone HMPP are added into a serum bottle, and a mixed transparent prepolymer is obtained after ultrasonic vibration for 10 minutes, and is named as MPH;

[0021] S203, configuration of the LPC precursor:

[0022] 2 mL of PS@SiO2 microsphere dispersion liquid, 10 μL of carbon black and ethanol dispersion liquid with a mass fraction of 12% and a concentration of 0.025 g / mL, and a predetermined amount of MPH are added into a serum bottle, and the PS@SiO2 microspheres are uniformly dispersed in the mixed medium after ultrasonic vibration for 5 minutes;

[0023] The serum bottle is transferred to a vacuum drying oven at 100 ℃, and after 90 minutes, a liquid photonic crystal PS@SiO2 LPC-MEA with bright structural color is obtained.

[0024] In a possible implementation, the S3 comprises:

[0025] S301, 1 g of lithium fluoride LiF is added into a polytetrafluoroethylene beaker containing 20 mL of 9 mol / L hydrochloric acid, and the lithium fluoride LiF is completely dissolved after magnetic stirring for 10 minutes;

[0026] S302, then 1 g of titanium aluminum carbide Ti3AlC2 powder is slowly added into the system of S301, and the reaction is carried out under magnetic stirring at 35 ℃ for 24 hours, and the obtained black liquid is repeatedly centrifuged with deionized water at a speed of 3500 r / min until the pH value of the supernatant is 7; the supernatant is poured out, deionized water is added into the centrifuge tube again, and the centrifuge tube is hand shaken for 30 minutes and ultrasonically vibrated in an ice water bath for 10 minutes; finally, the centrifuge tube is centrifuged at a speed of 3500 r / min for 5 minutes, and the supernatant is the Mxene nanosheet dispersion liquid.

[0027] In a possible implementation, by changing the particle size of the PS microspheres, PS@SiO2 microspheres with different particle sizes are obtained.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] The application discloses a preparation method of a photoelectric dual-signal response structural color fabric. The structural color fabric with bright structural color is obtained by increasing the refractive index contrast of the PCs system and introducing black substances. First, PS@SiO2 microspheres with a core-shell structure are selected as assembly machines, high-refractive PS@SiO2 microspheres (refractive index is 1.5-1.59) are dispersed in low-refractive 2-methacrylate-2-methoxyethyl ester (MEA, refractive index is 1.427) by using a volatilization-driven supersaturation precipitation method. Due to the high-refractive index contrast (refractive index difference is 0.11), the PS@SiO2 LPCs present bright structural color. Then, the MEA is polymerized by using an ultraviolet light irradiation technology, the PS@SiO2 microspheres are quickly positioned, and the non-dense LPCs are converted into non-dense SPCs. MXene is used as a conductive material and a light scattering absorber, and a black conductive fabric is prepared by using a dip coating method. The PS@SiO2 non-dense SPCs are combined with the conductive fabric to prepare the structural color fabric with photoelectric dual-signal response. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A flow chart of a preparation method of a photoelectric dual-signal response structural color fabric is shown.

[0031] Figure 2 An SEM image of a cross section of M-Fabric@SPCs is shown.

[0032] Figure 3 EDS data of a cross section of M-Fabric@SPCs is shown.

[0033] Figure 4 Mapping of a cross section of M-Fabric@SPCs is shown.

[0034] Figure 5 An SEM image of a surface of PS@SiO2 SPCs is shown.

[0035] Figure 6 An SEM image of a cross section of PS@SiO2 SPCs is shown.

[0036] Figure 7 Photos of M-Fabric@SPCs with different colors and reflection spectra thereof are shown.

[0037] Figure 8 A schematic diagram of different observation angles under a 15° light source is shown.

[0038] Figure 9 M-Fabric@SPCs under different observation angles under a 15° light source are shown.

[0039] Figure 10Reflectance spectra of M-Fabric® SPCs at different viewing angles under 45° light source.

[0040] Figure 11 Photos showing color change of red M-Fabric® SPCs under different strains.

[0041] Figure 12 Reflectance spectra of structural color fabrics under different strains.

[0042] Figure 13 Relative resistance change curve and wavelength change curve of structural color fabrics under different deformations.

[0043] Figure 14 Photos showing monitoring of human joint movement.

[0044] Figure 15 Reflectance spectra of human joints attached with M-Fabric® SPCs.

[0045] Figure 16 Relative resistance change curve of M-Fabric® SPCs when human joints move. DETAILED DESCRIPTION

[0046] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in different drawings represent the same or similar elements. Although various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0047] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0048] In addition, for the purpose of convenience and brevity, detailed descriptions of well-known functions and structures incorporated in the disclosure will be omitted. It will be appreciated that the present disclosure can be practiced with the exact details as

[0049] A method for preparing a photoelectric dual-signal response structural color fabric, the method comprising:

[0050] S1: Synthesis of PS@SiO2colloidal microspheres, PS@SiO2denoting silica-coated polystyrene;

[0051] S2: Preparation of PS@SiO2liquid photonic crystal;

[0052] S3: Preparation of Mxene dispersion liquid;

[0053] S4: Preparation of the structural color fabric with photoelectric dual signal response, comprising:

[0054] Preparation of the elastic solid photonic crystal PS@SiO2 SPCs film: 30 μL of liquid photonic crystal PS@SiO2 LPCs-MEA was injected into the space between two glass slides with a spacing of 0.1 mm, and the glass slides were placed directly under the ultraviolet lamp for irradiation for 30 s to obtain an elastic SPCs film with bright structural color, i.e., PS@SiO2 SPCs,

[0055] Preparation of the conductive elastic knitted fabric: the cut white elastic knitted fabric was added into a 10 g / L NaOH aqueous solution, soaked at a temperature of 95 ℃ for 1 hour, then rinsed with deionized water, and finally dried in an oven at 60 ℃ for 1 hour; the dried elastic knitted fabric was immersed in a Mxene dispersion liquid for 5 minutes, and then dried in an oven at 60 ℃ for 20 minutes, and the Mxene-loaded conductive elastic knitted fabric, denoted as M-Fabric, was obtained after three cycles of immersion;

[0056] The PS@SiO2 SPCs and the M-Fabric were combined together under the adhesion of the waterborne polyacrylate WPA to obtain the M-Fabric@SPCs with photoelectric dual signal response.

[0057] In a possible implementation, the S1 comprises:

[0058] Step S101, 60 mL of polystyrene PS emulsion and 300 mL of deionized water were added into a single-neck flask, and the PS microspheres were uniformly dispersed in the deionized water by ultrasonic vibration for 10 minutes;

[0059] First, PS@SiO2 microspheres with different particle sizes were synthesized. Different particle sizes of PS microspheres prepared by emulsion polymerization were used as cores, and then SiO2 shells were coated on the surfaces of the PS microspheres through hydrolysis and polycondensation of VTES. The specific preparation process includes two steps: one is the synthesis of PS microspheres. During the emulsion polymerization process, initiator molecules enter the monomer-swollen micelles wrapped by sodium dodecyl sulfate (SDS), initiate the emulsion polymerization reaction, and form primary micro-nuclei. As the reaction proceeds, the monomers in the oil droplets diffuse into the water and are absorbed by the micro-nuclei, and the micro-nuclei gradually grow into PS microspheres. The second step is the coating of SiO2 shells.

[0060] Step S102, 24 mL of ammonia water was added to the flask at a speed of 500 revolutions per minute, and magnetic stirring was performed for 10 minutes;

[0061] Step S103, VTES was slowly added dropwise into the flask, and the reaction was carried out at a temperature of 30 ℃ for 20 hours to obtain a PS@SiO2 colloidal microsphere dispersion liquid.

[0062] Step S104, the PS@SiO2 colloidal microsphere dispersion liquid is washed by centrifugation with anhydrous ethanol for 3 times, and finally the precipitate is dispersed in anhydrous ethanol for storage.

[0063] In a possible implementation, the S2 includes:

[0064] S202, configuration of the prepolymer:

[0065] 1 mL of 2-methoxyethyl acrylate M EA, 20 μL of polyethylene glycol diacrylate PEGDA and 5 μL of 2-hydroxy-2-methylpropiophenone HMPP are added into a serum bottle, and a mixed transparent prepolymer is obtained after ultrasonic vibration for 10 minutes, and is named as MPH;

[0066] S203, configuration of the LPC precursor:

[0067] 2 mL of PS@SiO2 microsphere dispersion liquid, 10 μL of carbon black and alcohol dispersion liquid with a mass fraction of 12% and a concentration of 0.025 g / mL, and a predetermined amount of MPH are added into a serum bottle, and the PS@SiO2 microspheres are uniformly dispersed in the mixed medium by ultrasonic vibration for 5 minutes;

[0068] The serum bottle is transferred to a vacuum drying oven at 100 ℃, and after 90 minutes, a liquid photonic crystal PS@SiO2 LPCs-MEA with bright structural color is obtained.

[0069] For example, the amount of MPH is 300 μL, 350 μL, 450 μL, 500 μL, and the color of the obtained PS@SiO2 LPCs-MEA is different.

[0070] In a possible implementation, the S3 includes:

[0071] S301, 1 g of lithium fluoride LiF is added into a polytetrafluoroethylene beaker containing 20 mL of 9 mol / L hydrochloric acid, and the lithium fluoride LiF is completely dissolved by magnetic stirring for 10 minutes;

[0072] S302, then 1 g of titanium aluminum carbide Ti3AlC2 powder is slowly added into the system of S301, and the reaction is carried out by magnetic stirring at 35 ℃ for 24 hours; the obtained black liquid is repeatedly washed by centrifugation with deionized water at a speed of 3500 revolutions per minute until the pH value of the supernatant is 7; the supernatant is poured out, deionized water is added into the centrifuge tube again, and the centrifuge tube is hand shaken for 30 minutes and ultrasonically vibrated in an ice water bath for 10 minutes; finally, the centrifuge tube is centrifuged at a speed of 3500 revolutions per minute for 5 minutes, and the supernatant is the Mxene nanosheet dispersion liquid.

[0073] In a possible implementation, by changing the particle size of the PS microspheres, PS@SiO2 microspheres with different particle sizes can be obtained.

[0074] By Figures 2-6 , the micro-morphology of M-Fabric@SPCs can be observed. Figure 2 The SEM (Scanning Electron Microscope) image of the cross section of M-Fabric@SPCs is given, and the three-layer structure can be clearly seen, which is the top layer of PS@SiO2 SPCs, the WPA layer and the WPA semi-embedded base fabric M-Fabric. Thanks to the excellent adhesion of WPA, PS@SiO2 SPCs are tightly adhered to the surface of the base fabric. Through EDS and Mapping tests, it can be known that Ti elements are uniformly distributed on the base fabric, indicating that MXene is uniformly coated. Figure 2 The horizontal axis in the XPS spectrum represents energy, with a unit of keV, and the vertical axis represents intensity, with a unit of cps / eV. Figure 2 The elements (Element) in the XPS spectrum include: C, O, Ti, Si, Figure 2 The atomic percentage (Atomic%) and weight percentage (Wt%) of each element are shown in the XPS spectrum. The Si element from the PS@SiO2 microspheres is distributed on the top layer of SPCs ( Figure 3 and Figure 4 ). Referring to Figure 5 and Figure 6 , the SEM image of SPCs on the surface of M-Fabric@SPCs is consistent with that of air-filled PS@SiO2 SPCs-Air. The PS@SiO2 microspheres still maintain an ordered face-centered cubic structure, but the microspheres are no longer in close "point-point" contact with each other, but are filled with PMEA to form a non-dense ordered photonic crystal structure.

[0075] Referring to Figures 7-9 , LPCs are prepared by using PS@SiO2 microspheres with three different particle sizes, and different colors of PS@SiO2 SPCs films are obtained by light curing, and then combined with black M-Fabric to obtain M-Fabric@SPCs with different colors. As shown in Figure 7 , the SEM images of the cross section of M-Fabric@SPCs with different colors are shown in Figure 7The horizontal axis represents wavelength (unit nm), and the vertical axis represents reflectivity. Blue (PC-1), green (PC-2) and red (PC-3) structural color fabrics were prepared by using PS@SiO2 microspheres with particle sizes of 174 nm, 208 nm and 241 nm, respectively. The corresponding reflection spectra showed reflection peaks at 440 nm, 560 nm and 625 nm, respectively. At the same time, the CIE diagram converted from the reflection spectrum showed the simulated color, which was consistent with the actual structural color fabric. It is worth mentioning that the structural color of the M-Fabric@SPCs changed during the photocuring process of the conversion of the LPCs to the SPCs. Due to the preservation of the ordered structure of the PS@SiO2 microspheres during the photocuring process, the M-Fabric@SPCs also had the iridescent effect.

[0076] Figures 9-10 The test results of the M-Fabric@SPCs showed the color change of the M-Fabric@SPCs under different observation angles. Figure 10 The horizontal axis represents wavelength (unit nm), and the vertical axis represents reflectivity. The three different colors of structural color fabrics all showed different colors under different angles. Taking PC-3 under a 45° light source as an example, when the observation angle increased from -15° to 110°, the maximum reflection wavelength of the reflection spectrum increased from 540 nm to 620 nm, with a wavelength difference of 90 nm, and a significant red shift phenomenon appeared, which indicated that the M-Fabric@SPCs showed different structural colors under different observation angles, i.e., the iridescent effect.

[0077] The elastic knitted fabric substrate and the PS@SiO2 SPCs-PMEA film gave the M-Fabric@SPCs the mechanochromic property. In order to test the performance of the structural color fabric in transmitting light signals under stress, a horizontal tensile force was applied to the red structural color fabric, and the structural color fabric deformed with the action of the force, while showing a series of color changes. As shown in Figure 11 , the red structural color fabric changed from red to cyan within a deformation range of 0 ~ 70% (ε represents the deformation rate). As can be seen from Figure 12 , the corresponding reflection spectrum shifted from 625 nm to 480 nm, Figure 12 , the horizontal axis represents wavelength, and the vertical axis represents reflectivity. Different colors represent different deformation rates. The changes in color and reflection spectrum prove that the lattice structure of the PS@SiO2 SPCs-PMEA changed under the action of external force.

[0078] Figure 13 The relative resistance change curve and the wavelength change curve of the structural color fabric under different deformations are shown. The horizontal axis represents the deformation rate, the left vertical axis represents the ratio of the real-time resistance to the initial resistance, and the right vertical axis represents the maximum reflection wavelength. Figure 13The middle black curve represents a strain coefficient GF of 2.07, and the red curve represents a strain coefficient GF of -1.45. The strain coefficient (GF) is a parameter for evaluating the sensitivity of the sensing material, and is the ratio of the resistance change of the material to the strain (ε) in the strain interval. The greater the absolute value of GF, the more sensitive the sensing material is.

[0079] Thanks to the excellent photoelectric dual-signal output performance of M-Fabric SPCs, the visualization monitoring of human joint movement can be realized by attaching the M-Fabric fabric to the skin of the human body. Compared with elastomer or hydrogel-based sensors, fabric-based sensors have the advantages of comfort and air permeability, and are more suitable as visualization detection devices for human movement.

[0080] M-Fabric SPCs can well monitor the bending actions of the finger, wrist, elbow, knee, and ankle. Taking finger bending as an example, Figure 14 The figure shows the state when the finger is straightened to bent, it can be seen that the M-Fabric SPCs changes from green to blue, and the reflection spectrum shifts from 550 nm to 465 nm. The visualized optical signal expresses the change of the limb movement. By repeatedly bending the finger, a regular relative resistance change curve is obtained, which also proves the normal collection of the electrical signal. The above experimental results show that M-Fabric SPCs can well complete the monitoring task of human movement and output photoelectric signals, which proves that M-Fabric SPCs have good application prospects.

[0081] Figure 15 The figure shows the reflection spectrum of the human joint attached with M-Fabric SPCs. The green curve is the spectrum of M-Fabric SPCs in the straightened state of the finger, the horizontal axis represents the wavelength, and the vertical axis represents the deformation rate. Figure 16 The figure shows the relative resistance change curve of M-Fabric SPCs when the human joint moves, that is, the ratio of the real-time resistance to the initial resistance changes with time.

[0082] The above has described various embodiments of the present disclosure, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications, or technical improvements in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A method for preparing a photoelectric dual-signal responsive structured colored fabric, characterized in that, The method includes: S1: Synthesis of PS@SiO2 colloidal microspheres, where PS@SiO2 represents silica-coated polystyrene; S2: Preparation of PS@SiO2 liquid photonic crystal; S3: Preparation of Mxene dispersion; S4: Preparation of structured colored fabric with photoelectric dual signal response, including: preparation of elastic solid photonic crystal PS@SiO2 SPCs film: 30 μL of PS@SiO2 liquid photonic crystal PS@SiO2 LPCs-MEA was injected into the space between two glass slides with a spacing of 0.1 mm. The glass slides were placed directly under an ultraviolet lamp for 30s to obtain an elastic SPCs film with bright structural color, namely PS@SiO2 SPCs; Preparation of conductive elastic knitted fabric: White elastic knitted fabric was added to a 10 g / L NaOH aqueous solution and soaked at 95℃ for 1 hour. Then it was rinsed with deionized water and finally dried in a 60℃ oven for 1 hour. The dried elastic knitted fabric was then immersed in Mxene dispersion for 5 minutes and dried in a 60℃ oven for 20 minutes. After three cycles of immersion, Mxene-loaded conductive elastic knitted fabric was obtained, denoted as M-Fabric. PS@SiO2 SPCs and M-Fabric are bonded together by water-based polyacrylate WPA to obtain structurally colored fabric M-Fabric@SPCs with photoelectric dual-signal response; S2 includes: S202, Prepolymer Configuration: 1 mL of 2-methoxyethyl 2-acrylate (MEA), 20 μL of polyethylene glycol diacrylate (PEGDA), and 5 μL of 2-hydroxy-2-methylphenylacetone (HMPP) were added to a serum bottle. After ultrasonic vibration for 10 minutes, a mixed transparent prepolymer was obtained and named MPH. S203, LPCs precursor configuration: 2 mL of PS@SiO2 microsphere dispersion, 10 μL of carbon black and ethanol dispersion with a mass fraction of 12% and a concentration of 0.025 g / mL, and a predetermined amount of MPH were added to the serum bottle. The mixture was ultrasonically vibrated for 5 minutes to ensure that the PS@SiO2 microspheres were uniformly dispersed in the mixed medium. The serum bottle was transferred to a vacuum drying oven at 100 °C. After 90 minutes, a liquid photonic crystal PS@SiO2 LPCs-MEA with a bright structural color was obtained. S3 includes: S301. Add 1 g of lithium fluoride (LiF) to a polytetrafluoroethylene beaker containing 20 mL of 9 mol / L hydrochloric acid, and stir magnetically for 10 minutes to completely dissolve the lithium fluoride (LiF). S302, then 1 g of aluminum carbide Ti3AlC2 powder was slowly added to the S301 system, and the reaction was carried out at 35 ℃ with magnetic stirring for 24 hours. The obtained black liquid was repeatedly centrifuged and washed with deionized water at 3500 rpm until the pH of the supernatant was 7. The supernatant was discarded, and deionized water was added to the centrifuge tube again. After shaking by hand for 30 minutes, it was ultrasonically vibrated in an ice-water bath for 10 minutes. Finally, it was centrifuged at 3500 rpm for 5 minutes. The supernatant was the Mxene nanosheet dispersion.

2. The method for preparing a photoelectric dual-signal response structured colored fabric according to claim 1, characterized in that, S1 includes: Step S101: Add 60 mL of polystyrene (PS) emulsion and 300 mL of deionized water into a single-necked flask, and ultrasonically vibrate for 10 minutes to uniformly disperse the PS microspheres in the deionized water. Step S102: Add 24 mL of ammonia solution to the flask at a rotation speed of 500 rpm, and stir magnetically for 10 minutes. In step S103, vinyltriethoxysilane (VTES) is slowly added dropwise to the flask, and the mixture is reacted at 30 °C for 20 hours to obtain a PS@SiO2 colloidal microsphere dispersion. In step S104, the PS@SiO2 colloidal microsphere dispersion was centrifuged and washed three times with anhydrous ethanol, and finally the precipitate was dispersed in anhydrous ethanol for storage.

3. The method for preparing a photoelectric dual-signal response structured colored fabric according to claim 1, characterized in that, By changing the particle size of the PS microspheres, PS@SiO2 microspheres with different particle sizes were obtained.

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