A textile with irregular photonic crystal texture pattern and preparation method thereof

Abstract

The present invention relates to the field of textile structural coloration, and particularly to a textile with an irregular photonic crystal texture pattern and a method for preparing the same. The method comprises the following steps: S1. uniformly mixing a nanosphere dispersion, a high-boiling-point additive, a stray light absorber, and a surfactant to obtain a nanosphere printing paste; S2. applying an aqueous solution of a charge-effect modifier to the surface of a hydrophobic fabric, and subsequently performing a heat-drying or non-heat-drying treatment depending on the properties and application method of the charge-effect modifier to obtain a modified fabric; S3. applying a nanosphere printing paste to the surface of the modified fabric obtained in S2; S4. heating and assembling the modified fabric containing the nanosphere coating obtained in S3 to obtain a textile with an irregular photonic crystal texture pattern. This method utilizes the charge effect to simply and quickly produce a photonic crystal structured coloration pattern with an iridescent effect and high structural stability on the fabric, endowing the textile with unique aesthetics and fashion, and is suitable for large-scale industrial applications.

Description

Technical Field

[0001] The present invention relates to the field of textile structural coloration, and in particular to a textile with an irregular photonic crystal texture pattern and a preparation method thereof. Background Art

[0002] Photonic crystals are a type of crystalline material formed by arranging two or more substances with different dielectric constants (refractive indices) in a periodic pattern in space. This special periodic structure gives them unique optical controllability, and thus they are widely used in a variety of fields such as display devices, detection, sensing, anti-counterfeiting markings, and fashion textiles. Patterned coloring of textiles is an important means to increase the added value of textile products and meet personalized aesthetic needs. Patterned photonic crystals with iridescent effects not only have specific pattern effects, but also exhibit high brightness, high saturation, and dynamically changing structural color visual effects. They have great development prospects in the fields of ecological textiles, fashion textiles, and smart textiles.

[0003] At present, the preparation technologies of patterned photonic crystals include optical etching technology, mask technology, inkjet printing technology, screen printing technology, etc. Among them, although optical etching technology is relatively mature, it requires expensive and sophisticated equipment and is difficult to be widely used; mask technology is difficult to achieve industrial production due to template limitations; inkjet printing technology is hindered from industrial application due to the easy clogging of the nozzle; screen printing is currently the most commonly used method for constructing patterned photonic crystals. Zhou et al. (Zhou C, Qi Y, Zhang S, et al. Rapid fabrication of vivid noniridescent structural colors on fabrics with robust structural stability by screen printing [J]. Dyes and Pigments, 2020, 176: 108-226.) prepared a printing paste with polyacrylate (PA) water-based adhesive, carbon black and polystyrene microspheres, and printed it on white polyester fabric by screen printing to obtain a non-iridescent color pattern. Due to the bonding effect of PA, the prepared photonic crystals have strong structural stability and the outline of the structural color pattern is clear. However, because the PA macromolecules in the printing paste (accounting for 8wt% of the nanospheres) significantly affect the regular assembly of the nanospheres, the printed pattern has a wide viewing angle similar to that of dyes, the saturation and brightness of the structural color are low, and the unique iridescent effect of the photonic crystal structural color is lost. Chinese patent document CN115233473A uses a screen printing method to print a photonic crystal structure color pattern with a scintillating effect on fabric. This method adds a synthetic thickener with high thickening capacity to the printing paste to play a viscosity-regulating role, which is conducive to obtaining a clear-cut pattern. However, the addition of the thickener inevitably affects the assembly of the nanospheres to a certain extent, resulting in a short-range ordered-long-range quasi-ordered photonic crystal pattern with a certain scintillating effect but no obvious iridescence effect. Chinese patent document CN115287919A uses a screen printing method to create a pattern of differing hydrophilicity and hydrophobicity on a textile substrate. Combined with shear-induced assembly, liquid photonic crystals are confined to the hydrophilic patterned areas. The resulting patterned photonic crystals exhibit both good outline clarity and a significant iridescent effect. While this method can produce photonic crystal patterns with an iridescent effect, it is complex. Furthermore, due to the limitations of the screen printing method, the patterns of industrial products exhibit repetitiveness.With the improvement of people's living standards, people have higher and higher requirements for the aesthetics of textiles. The pursuit of individuality and uniqueness has become a fashion trend. Textiles with irregular texture patterns are favored by people. For example, the Chinese folk batik art produces a natural ice effect that is difficult to imitate artificially, making each product unique and showing a fresh and natural beauty. However, it is still a difficult problem to achieve the industrial production of textiles with irregular photonic crystal texture patterns through currently commonly used printing technologies. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for preparing textiles with irregular photonic crystal texture patterns. This method utilizes the charge effect to simply and quickly produce photonic crystal structure color-producing patterns with iridescent effects and high structural stability on the fabric, giving the textiles unique aesthetics and fashion, and is suitable for large-scale industrial applications.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A method for preparing a textile having an irregular photonic crystal texture pattern, the method comprising the following steps:

[0007] S1. Preparation of nano-microsphere printing paste

[0008] The nanosphere dispersion, a high boiling point additive, a stray light absorber, and a surfactant are uniformly mixed to obtain a nanosphere printing paste; wherein the solid content of the nanosphere dispersion is 25% to 55%. Based on the weight of the nanosphere dispersion as 100%, the amount of the high boiling point additive is 0.5 to 6% of the weight of the nanosphere dispersion, the amount of the stray light absorber is 0 to 0.3% of the weight of the nanosphere dispersion, and the amount of the surfactant is 2 to 8% of the weight of the nanosphere dispersion;

[0009] The high boiling point additive is selected from one or a mixture of glycerol, propylene glycol, formamide, and ethylene glycol;

[0010] The surfactant is selected from one or a mixture of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, polyoxyethylene sorbitan fatty acid ester, fatty acid methyl ester ethoxylate or polypropylene glycol ethylene oxide adduct;

[0011] The stray light absorber is selected from one or a mixture of black dye, nano carbon black or water-soluble black pigment;

[0012] S2. applying an aqueous solution of a charge effect modifier to the surface of a hydrophobic fabric, and performing subsequent heating and drying or non-heating drying treatment according to the properties and application method of the charge effect modifier to obtain a modified fabric;

[0013] The charge effect modifier is an ionic surfactant or a charged polymer. When the charge effect modifier is an ionic surfactant, the concentration is 0.1 to 30 wt %; when the charge effect modifier is a charged polymer, the concentration is 0.01 to 0.8 wt %;

[0014] S3, applying nano-microsphere printing paste on the surface of the modified fabric obtained in S2;

[0015] S4. The modified fabric containing the nano-microsphere coating obtained in S3 is heated and assembled to obtain a textile having an irregular photonic crystal texture pattern.

[0016] In S2 of the present invention, if the nano-microsphere printing paste applied subsequently adopts hard-core-soft-shell nano-microspheres, the above-mentioned modifier can be directly applied to the surface of the hydrophobic fabric with a tight structure; for hydrophilic or loosely structured fabrics, water-repellent finishing or coating finishing is required. If the nano-microsphere printing paste applied subsequently adopts hard nano-microspheres, in order to improve the stability of the assembly structure, before applying the charge effect modifier, it is necessary to construct an appropriate polymer film on the surface of the fabric according to the Chinese invention patent "Large-area preparation method of high-stability and high-saturation photonic crystal structure color-forming fabric" (ZL202111437620.8), that is, a fabric with a polymer layer obtained by heating and curing the special polymer described in the patent to form a film.

[0017] The preparation method of the present invention can form irregular photonic crystal patterns on textile substrates to obtain textiles with both unique texture pattern effects and photonic crystal iridescent effect structural colors, thereby achieving the beauty and uniqueness of the patterns and colors.

[0018] Preferably, the nanoparticles described in S1 are colloidal nanoparticles with ionic groups or negatively or positively charged surfaces, including

[0019] Organic polymer colloidal nanospheres include polystyrene (PS), polymethyl methacrylate (PMMA), polystyrene@polyacrylic acid (PS@PAA), polystyrene@polydopamine (PS@PDA), poly(styrene-hydroxyethyl acrylate) (P(St-HEA)), poly(styrene-methyl methacrylate) (P(St-MMA)), poly(styrene-methacrylic acid) (P(St-MAA)), polystyrene@poly(methyl methacrylate-butyl acrylate) (PS@P(MMA-BA)), polymethyl methacrylate@poly(hydroxyethyl acrylate-hydroxyethyl methacrylate) (PMAA@P(HEA-HEMA)), poly(styrene-methacrylic acid)@poly(ethyl acrylate-methacrylic acid) (P(St-MAA)@P(EA-MAA)) nanospheres.

[0020] Inorganic colloidal nanoparticles of silica (SiO2), titanium dioxide (TiO2), zirconium oxide (ZrO) nanoparticles, or

[0021] Any one of organic@inorganic and inorganic@organic colloidal nanospheres, polystyrene@silica (PS@SiO2) and silica@polystyrene (SiO2@PS) nanospheres.

[0022] Preferably, the ionic surfactant in S2 includes anionic surfactants and cationic surfactants, the anionic surfactants include sodium stearate, sodium palmitate, sodium lauryl sulfate or sodium dodecylbenzenesulfonate; the cationic surfactants include hexadecyltrimethylammonium bromide, dodecyltrimethylammonium bromide or hexadecylpyridinium chloride; the charged natural or synthetic polymers include sodium alginate, carboxymethyl cellulose, sodium polyacrylate and its derivatives.

[0023] Preferably, the charge effect modifier in S2 is applied by dipping, padding or coating.

[0024] Preferably, the subsequent heating and drying / non-heating drying treatment described in S2 is carried out according to the performance and application method of the charge effect modifier, specifically: when an ionic surfactant is used, the modified fabric needs to be heated and dried, the drying temperature is 60-90°C, and the drying time is 2-5 minutes; when a charged polymer is used, the liquid carrying rate of the modified fabric is controlled to be 5-80% without heating and drying treatment, and the next step of processing is directly carried out.

[0025] Preferably, the hydrophobic fabric described in S2 has a water contact angle of 110° to 180°.

[0026] Preferably, the nano-microsphere printing paste described in S3 is applied by blade coating or spraying.

[0027] Preferably, in the heating assembly described in S4, the assembly temperature is 40 to 130° C. and the assembly time is 3 to 60 minutes.

[0028] Preferably, the fabric is selected from polyester fabric, nylon fabric, cotton fabric, silk fabric, polyester-cotton blended fabric or polyester-spandex blended fabric.

[0029] A textile with an irregular photonic crystal texture pattern is prepared according to the preparation method of the present invention.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention applies a charge effect modifier to the surface of the fabric and utilizes the basic physical principle that like charges repel and opposite charges attract. This promotes the local enrichment and supersaturated crystallization of charged colloidal nanospheres on the textile substrate modified by the charge effect modifier, forming an irregular photonic crystal texture pattern. The result is a textile with both a unique texture pattern and iridescent structural color, making the pattern of each textile product unique.

[0032] 2. The size of the light and dark areas of the irregular pattern prepared by the present invention can be adjusted. The modifier that can produce the charge effect is widely available, inexpensive, environmentally friendly, requires a small amount, and is easy to use.

[0033] 3. The method of the present invention for preparing irregularly patterned photonic crystal textiles is simple and efficient, can be prepared quickly and on a large scale, and is suitable for continuous industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a digital photograph of the textile with irregular photonic crystal texture pattern prepared in Example 1;

[0035] Figure 2 A digital photograph (left) and a reflectivity curve (right) of the textile with an irregular photonic crystal texture pattern prepared in Example 2 are shown;

[0036] Figure 3 is a digital photograph of the textile with irregular photonic crystal texture pattern prepared in Example 3;

[0037] Figure 4 is a digital photograph of the textile with irregular photonic crystal texture pattern prepared in Example 4;

[0038] Figure 5 is a digital photograph of the textile with irregular photonic crystal texture pattern prepared in Example 5;

[0039] Figure 6 is a digital photograph of the textile with irregular photonic crystal texture pattern prepared in Example 6;

[0040] Figure 7 This is a digital photograph of the textile with an irregular photonic crystal texture pattern prepared in Example 7, wherein a is the sample pattern photographed when the angle between the observation angle and the normal is 0°, and b is the sample pattern photographed when the angle between the observation angle and the normal is 45°;

[0041] Figure 8is a digital photograph of the textile with an irregular photonic crystal texture pattern prepared in Example 8, wherein a is the sample pattern photographed at an angle of 0° between the observation angle and the normal, b is the sample pattern photographed at an angle of 45° between the observation angle and the normal, and c is the sample pattern photographed at an angle of 75° between the observation angle and the normal;

[0042] Figure 9 This is a digital photograph of the textile with an irregular photonic crystal texture pattern prepared in Example 9, wherein a is the sample pattern photographed when the angle between the observation angle and the normal is 0°, and b is the sample pattern photographed when the angle between the observation angle and the normal is 45°;

[0043] Figure 10 is a digital photograph of the textile with irregular photonic crystal texture pattern prepared in Example 10;

[0044] Figure 11 This is a digital photograph of a textile without a texture pattern prepared in Comparative Example 1;

[0045] Figure 12 This is a digital photograph of a textile without a texture pattern prepared in Comparative Example 2;

[0046] Figure 13 This is a digital photograph of a textile without a texture pattern prepared in Comparative Example 3, wherein a is a sample pattern photographed on the front side of the fabric, and b is a sample pattern photographed on the back side of the fabric;

[0047] Figure 14 This is a digital photograph of a textile without a texture pattern prepared in Comparative Example 4;

[0048] Figure 15 This is a digital photograph of the textile without texture pattern prepared in Comparative Example 5. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is further described in detail below through specific examples. It should be understood that the implementation of the present invention is not limited to the following examples, and any form of modification and / or change made to the present invention will fall within the scope of protection of the present invention.

[0050] In the present invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the art. The methods in the following examples are all conventional methods in the art unless otherwise specified.

[0051] Unless otherwise specified, the reagents used in the following examples can be purchased from conventional biochemical reagent stores.

[0052] Surfactants and sodium alginate were purchased from Zhejiang Chuanhua Co., Ltd., special polymer ① (PUE1401) was purchased from Shanghai Sisheng Polymer Materials Co., Ltd., sodium dodecyl sulfate was purchased from Aladdin Reagent (Shanghai) Co., Ltd., and sodium dodecylbenzenesulfonate was purchased from Shanghai MacLean Biochemical Technology Co., Ltd. (some of the products are listed, but not limited to the above products).

[0053] The polyester fabric with a special polymer film described in the present invention is a fabric with a polymer layer obtained by heating and curing a special polymer into a film according to the Chinese invention patent "Large-area preparation method of high-stability and high-saturation photonic crystal structure color-producing fabric" (ZL202111437620.8), wherein the special polymer includes a soft-segment and hard-segment copolymerized polyurethane polymer, or a soft-segment and hard-segment copolymerized polyacrylic polymer;

[0054] The specific preparation method of the polyester fabric with special polymer film used in the following examples is: 8 g / m2 of special polymer ① (PUE1401) is scraped onto the surface of the polyester fabric, and the fabric is placed in a heating device and heated at 80° C. for 5 minutes to form a film.

[0055] Example 1

[0056] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0057] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 180 nm and a mass fraction of 45% was mixed with 3% glycerol, 0.12% water-soluble black pigment, and 5% polyoxyethylene sorbitan fatty acid ester, based on the weight of the nanosphere dispersion as 100%, and the mixture was set aside;

[0058] (2) coating a 0.5% sodium dodecylbenzenesulfonate aqueous solution on the surface of a white water-repellent treated polyester fabric, and then heating the fabric at 90° C. for 2 minutes to obtain a fabric modified with a charge effect modifier;

[0059] (3) coating the nano-microsphere printing paste prepared in step (1) on the surface of the modified fabric, with the thickness of the paste being about 0.1 mm;

[0060] (4) The fabric containing the nanospheres was placed in an oven at 130°C and heated for 15 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0061] Example 2

[0062] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0063] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 190 nm and a mass fraction of 25% was mixed with 0.5% ethylene glycol, 0.24% nano carbon black, and 3% fatty alcohol polyoxyethylene ether, based on the weight of the nanosphere dispersion as 100%, and the mixture was set aside;

[0064] (2) A white water-repellent treated polyester fabric was immersed in a 5% sodium dodecyl sulfate aqueous solution for 10 seconds, with a liquid carrying rate of 70%, and heated at 90°C for 2 minutes to obtain a fabric modified with a charge effect modifier;

[0065] (3) spraying the nano-microsphere printing paste prepared in step (1) on the surface of the modified fabric;

[0066] (4) The fabric containing the nanospheres was placed in an oven at 120°C and heated for 20 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0067] Example 3

[0068] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0069] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 185 nm and a mass fraction of 35% was mixed with 1% formamide and 4% polyoxyethylene sorbitan fatty acid ester based on the weight of the nanosphere dispersion as 100% and set aside;

[0070] (2) coating a 3% sodium dodecyl sulfate aqueous solution on the surface of a black water-repellent treated cotton fabric, and then heating the fabric at 90° C. for 2 min to obtain a fabric modified with a charge effect modifier;

[0071] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the modified fabric;

[0072] (4) The fabric containing the nanospheres was placed in an oven at 90°C and heated for 40 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0073] Example 4

[0074] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0075] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 198 nm and a mass fraction of 25% was mixed with 3% propylene glycol and 3% fatty alcohol polyoxyethylene ether based on the weight of the nanosphere dispersion as 100% and set aside;

[0076] (2) coating a 4% aqueous solution of hexadecyltrimethylammonium bromide on the surface of a black water-repellent treated silk fabric, and then heating the fabric at 70° C. for 3 minutes to obtain a fabric modified with a charge effect modifier;

[0077] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the modified fabric;

[0078] (4) The fabric containing the nanospheres was placed in an oven at 80°C and heated for 30 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0079] Example 5

[0080] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0081] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 188 nm and a mass fraction of 46% was mixed with 6% glycerol and 7% fatty alcohol polyoxyethylene ether based on the weight of the nanosphere dispersion as 100% and set aside;

[0082] (2) coating a 0.2% sodium alginate aqueous solution on the surface of a black water-repellent treated polyester-cotton blended fabric to obtain a fabric modified with a charge effect modifier;

[0083] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the modified fabric;

[0084] (4) The fabric containing the nanospheres was placed in an oven at 110°C and heated for 25 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0085] Example 6

[0086] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0087] (1) Preparation of nanosphere printing paste: a PS@P(MMA-EA) nanosphere dispersion with a particle size of 256 nm and a mass fraction of 45% was mixed with 5% glycerol, 0.22% water-soluble black pigment, and 6% fatty acid polyoxyethylene ester, based on the weight of the nanosphere dispersion as 100%, and the mixture was set aside;

[0088] (2) coating a 0.4% sodium polyacrylate aqueous solution on the surface of a white cotton fabric that had been treated with water repellent finishing to obtain a fabric modified with a charge effect modifier;

[0089] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the modified fabric;

[0090] (4) The fabric containing the nanospheres was placed in an oven at 90°C and heated for 30 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0091] Example 7

[0092] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0093] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 255 nm and a mass fraction of 35% was mixed with 1% glycerol, 0.20% nano carbon black, and 4% fatty alcohol polyoxyethylene ether, based on the weight of the nanosphere dispersion as 100%, and the mixture was set aside;

[0094] (2) coating a 6% sodium lauryl sulfate aqueous solution on the surface of a white water-repellent treated polyester / ammonia blended fabric, and then heating the fabric at 80° C. for 4 minutes to obtain a fabric modified with a charge effect modifier;

[0095] (3) scraping and coating the rice microsphere printing paste prepared in step (1) on the surface of the modified fabric;

[0096] (4) The fabric containing the nanospheres was placed in an oven at 120°C and heated for 20 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0097] Example 8

[0098] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0099] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 310 nm and a mass fraction of 45% was mixed with 2% glycerol, 0.16% nano carbon black, and 5% fatty alcohol polyoxyethylene ether, based on the weight of the nanosphere dispersion as 100%, and the mixture was set aside;

[0100] (2) coating a 6% sodium lauryl sulfate aqueous solution on the surface of a white water-repellent treated polyester fabric, and then heating the fabric at 80° C. for 4 minutes to obtain a fabric modified with a charge effect modifier;

[0101] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the modified fabric;

[0102] (4) The fabric containing the nanospheres was placed in an oven at 120°C and heated for 15 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0103] Example 9

[0104] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0105] (1) Preparation of nanosphere printing paste: a dispersion of SiO2 nanospheres with a particle size of 260 nm and a mass fraction of 25% is mixed with 1% glycerol, 0.20% nano carbon black, and 3% polyoxyethylene sorbitan fatty acid ester, based on the weight of the nanosphere dispersion as 100%, and the mixture is set aside;

[0106] (2) coating a 6% sodium lauryl sulfate aqueous solution on the surface of a white polyester fabric with a special polymer film, and then heating it at 80°C for 4 minutes to obtain a fabric modified with a charge effect modifier;

[0107] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the modified fabric;

[0108] (4) The fabric containing the nanospheres was placed in an oven at 60°C and heated for 50 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0109] Example 10

[0110] A method for preparing a textile having an irregular photonic crystal texture pattern, comprising the following steps:

[0111] (1) Preparation of nanosphere printing paste: a PS nanosphere dispersion with a particle size of 245 nm and a mass fraction of 30% is mixed with 3% propylene glycol, 0.3% nano carbon black, and 5% fatty alcohol polyoxyethylene ether, based on the weight of the nanosphere dispersion being 100%, and the mixture is set aside;

[0112] (2) coating a 0.3% carboxymethyl cellulose aqueous solution on the surface of a white polyester fabric with a special polymer film to obtain a fabric modified with a charge effect modifier;

[0113] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the modified fabric;

[0114] (4) The fabric containing the nanospheres was placed in an oven at 50°C and heated for 60 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0115] Figure 1 、 3The figures are digital photos of textiles with irregular photonic crystal texture patterns prepared in Examples 1 and 3, respectively. The fabrics are modified by charge effect using anionic surfactants. Due to the principle that like charges repel, charged colloidal nanospheres are locally enriched and supersaturated and crystallized on the textile substrate modified by the charge effect modifier, forming irregular photonic crystal texture patterns, proving that anionic surfactants can be used as charge effect modifiers for fabrics.

[0116] Figure 2 This is a digital photo of the textile with an irregular photonic crystal texture pattern prepared in Example 2 and its reflectivity curve. As shown in the reflectivity curve, the reflection peak in the texture pattern area is high and narrow, proving that its structural color has high brightness and saturation.

[0117] Figure 4 This is a digital photograph of a textile with an irregular photonic crystal texture pattern prepared in Example 4. A cationic surfactant was used to modify the fabric for charge effect. Due to the principle of opposite charges attracting each other, charged colloidal nanospheres were locally enriched and supersaturated and crystallized on the textile substrate modified by the charge effect modifier, forming an irregular photonic crystal texture pattern. This demonstrates that cationic surfactants can be used as charge effect modifiers for fabrics.

[0118] Figure 5 、 6 10 are digital photos of textiles with irregular photonic crystal texture patterns prepared in Examples 5, 6, and 10, respectively. The fabrics are modified by charged natural or synthetic polymers. Due to the principle of like charges repelling each other and the "fencing" effect of polymers, even if an extremely low concentration (less than 0.8%) of polymer charge effect modifier is used, the charged colloidal nanospheres are significantly enriched and supersaturated and crystallized on the textile substrate modified by the polymer charge effect modifier, forming irregular photonic crystal texture patterns. This proves that charged natural or synthetic polymers can be used as efficient fabric charge effect modifiers.

[0119] Figure 7 、 8 9 are digital photos of textiles with irregular photonic crystal texture patterns prepared in Examples 7, 8 and 9 respectively. It can be seen from the figures that the textiles with irregular photonic crystal texture patterns prepared have obvious iridescent effects.

[0120] Comparative Example 1

[0121] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 310 nm and a mass fraction of 45% was mixed with 2% glycerol, 0.16% nano carbon black, and 7% fatty alcohol polyoxyethylene ether, based on the weight of the nanosphere dispersion as 100%, and the mixture was set aside;

[0122] (2) coating the nano-microsphere printing paste prepared in step (1) on the surface of a white water-repellent polyester fabric;

[0123] (3) The fabric containing the nanospheres was placed in an oven at 120°C and heated for 15 minutes to obtain a textile with an irregular photonic crystal texture pattern.

[0124] Comparative Example 2

[0125] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 255 nm and a mass fraction of 35% was mixed with 1% glycerol, 0.20% nano carbon black, and 4% fatty alcohol polyoxyethylene ether, based on the weight of the nanosphere dispersion as 100%, and the mixture was set aside;

[0126] (2) After coating the surface of a white water-repellent treated polyester fabric with a 6% aqueous solution of fatty alcohol polyoxyethylene ether, the fabric was heated at 80°C for 4 minutes;

[0127] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the fabric treated in step (2);

[0128] (4) The fabric containing the nanospheres was placed in an oven at 120°C and heated for 20 min to obtain a textile without a textured pattern.

[0129] Comparative Example 3

[0130] (1) Preparation of nanosphere printing paste: a PS@P(MMA-EA) nanosphere dispersion with a particle size of 256 nm and a mass fraction of 45% was mixed with 5% glycerol, 0.22% water-soluble black pigment, and 6% fatty acid polyoxyethylene ester, based on the weight of the nanosphere dispersion as 100%, and the mixture was set aside;

[0131] (2) coating the surface of a white hydrophilic cotton fabric that has not been treated with water repellent finishing with a 0.4% sodium polyacrylate aqueous solution;

[0132] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the fabric treated in step (2);

[0133] (4) The fabric containing the nanospheres was placed in an oven at 90°C and heated for 30 min to obtain a textile without a textured pattern.

[0134] Comparative Example 4

[0135] (1) Preparation of nanosphere printing paste: a PS@P(MMA-BA) nanosphere dispersion with a particle size of 188 nm and a mass fraction of 46% was mixed with 6% glycerol and 7% fatty alcohol polyoxyethylene ether based on the weight of the nanosphere dispersion as 100% and set aside;

[0136] (2) coating a 0.2% sodium alginate aqueous solution on the surface of a black hydrophilic cotton fabric that had not been treated with water repellent finishing, and heating the fabric at 80°C for 4 minutes;

[0137] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the fabric treated in step (2);

[0138] (4) The fabric containing the nanospheres was placed in an oven at 110°C and heated for 25 minutes to obtain a textile without a textured pattern.

[0139] Comparative Example 5

[0140] (1) Preparation of nanosphere printing paste: a PS nanosphere dispersion with a particle size of 245 nm and a mass fraction of 30% is mixed with 3% propylene glycol, 0.3% nano carbon black, and 5% fatty alcohol polyoxyethylene ether, based on the weight of the nanosphere dispersion being 100%, and the mixture is set aside;

[0141] (2) coating a 5% carboxymethyl cellulose aqueous solution on the surface of a white polyester fabric with a special polymer film to obtain a fabric modified with a charge effect modifier;

[0142] (3) applying the nano-microsphere printing paste prepared in step (1) on the surface of the fabric treated in step (2);

[0143] (4) The fabric containing the nanospheres was placed in an oven at 50°C and heated for 60 min to obtain a textile without a textured pattern.

[0144] Figure 11 This is a digital photograph of a textile without a textured pattern prepared in Comparative Example 1 (compared with Example 8). When the fabric is not modified with a charge effect modifier, there is no significant electrostatic interaction between the fabric and the nanospheres, and no irregular photonic crystal pattern can be produced.

[0145] Figure 12 This is a digital photograph of a textile without a textured pattern prepared in Comparative Example 2 (compared with Example 7). When a non-ionic surfactant is used as a charge effect modifier to modify the fabric, there is no charge effect between it and the nanospheres, and no irregular photonic crystal pattern can be produced.

[0146] Figure 13This is a digital photograph of a textile without a textured pattern produced in Comparative Example 3 (compared with Example 6). When the hydrophilic cotton fabric is not treated with a water-repellent finish, the charge effect modifier and nanosphere printing paste penetrate the back of the fabric, resulting in low brightness and saturation, and the inability to produce a distinct irregular photonic crystal texture pattern.

[0147] Figure 14 This is a digital photograph of a non-textured textile produced in Comparative Example 4 (compared to Example 5). After coating the fabric surface with a sodium alginate aqueous solution and then heating it, the nanosphere printing paste contains relatively little water, making it difficult for the sodium alginate to fully swell and ionize, hindering the formation of a strong charging effect with the nanospheres. Consequently, the irregular photonic crystal pattern cannot be produced.

[0148] Figure 15 This is a digital photograph of a textile without a textured pattern produced in Comparative Example 5 (compared with Example 10). When the carboxymethyl cellulose aqueous solution concentration is too high, due to its high molecular weight, its excessive use can hinder the orderly assembly of photonic crystals. The resulting fabric has low brightness and saturation, and fails to produce a distinct irregular photonic crystal texture pattern.

[0149] In summary, the present invention utilizes the basic physical principle that like charges repel and opposite charges attract to promote the local enrichment and supersaturated crystallization of charged colloidal nanospheres on a textile substrate modified by a charge effect modifier, forming an irregular photonic crystal texture pattern, thereby obtaining a textile with both a unique texture pattern and an iridescent effect structural color, making the pattern of each textile product unique.

[0150] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. Reference can be made to the descriptions of the identical or similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and the relevant parts can be referred to the descriptions of the methods.

[0151] The above describes in detail a textile having an irregular photonic crystal texture pattern and its preparation method provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the method and core concepts of the present invention. It should be noted that those skilled in the art will be able to make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing a textile having an irregular photonic crystal texture pattern, characterized in that The method comprises the following steps: S1. Preparation of nano-microsphere printing paste The nanosphere dispersion, the high boiling point additive, the stray light absorber and the surfactant are uniformly mixed to obtain a nanosphere printing paste; wherein the solid content of the nanosphere dispersion is 25% to 55%; based on the weight of the nanosphere dispersion being 100%, the amount of the high boiling point additive is 0.5 to 6% of the weight of the nanosphere dispersion, the amount of the stray light absorber is 0 to 0.3% of the weight of the nanosphere dispersion, and the amount of the surfactant is 2 to 8% of the weight of the nanosphere dispersion; The high boiling point additive is selected from one or a mixture of glycerol, propylene glycol, formamide, and ethylene glycol; The surfactant is selected from one or a mixture of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, polyoxyethylene sorbitan fatty acid ester, fatty acid methyl ester ethoxylate or polypropylene glycol ethylene oxide adduct; The stray light absorber is selected from one or a mixture of black dye, nano carbon black or water-soluble black pigment; the nano microspheres are colloidal nano microspheres with ionic groups or negative or positive charges on the surface; S2. applying an aqueous solution of a charge effect modifier to the surface of a hydrophobic fabric, and performing subsequent heating and drying or non-heating drying treatment according to the properties and application method of the charge effect modifier to obtain a modified fabric; The charge effect modifier is an ionic surfactant or a charged polymer. When the charge effect modifier is an ionic surfactant, the concentration is 0.1 to 30 wt %; when the charge effect modifier is a charged polymer, the concentration is 0.01 to 0.8 wt %; S3, applying nano-microsphere printing paste on the surface of the modified fabric obtained in S2; S4, heating and assembling the modified fabric containing the nanosphere coating obtained in S3 to obtain a textile having an irregular photonic crystal texture pattern; The ionic surfactant in S2 is selected from anionic surfactants and cationic surfactants, wherein the anionic surfactant is selected from sodium stearate, sodium palmitate, sodium lauryl sulfate or sodium dodecylbenzenesulfonate; the cationic surfactant is selected from cetyltrimethylammonium bromide, dodecyltrimethylammonium bromide or cetylpyridinium chloride; the charged natural or synthetic polymer is selected from sodium alginate, carboxymethyl cellulose, and sodium polyacrylate; The subsequent heating and drying / non-heating drying treatment described in S2 is carried out according to the performance and application method of the charge effect modifier. Specifically, when an ionic surfactant is used, the modified fabric needs to be heated and dried at a temperature of 60~90°C and a drying time of 2~5 minutes. When a charged polymer is used, the liquid carrying rate of the modified fabric is controlled to be 5~80% without heating and drying treatment, and the next step of processing is directly carried out.

2. The preparation method according to claim 1, wherein: The nanoparticles described in S1 are selected from Organic polymer colloidal nanospheres include polystyrene (PS), polymethyl methacrylate (PMMA), polystyrene@polyacrylic acid (PS@PAA), polystyrene@polydopamine (PS@PDA), poly(styrene-hydroxyethyl acrylate) (P(St-HEA)), poly(styrene-methyl methacrylate) (P(St-MMA)), poly(styrene-methacrylic acid) (P(St-MAA)), polystyrene@poly(methyl methacrylate-butyl acrylate) (PS@P(MMA-BA)), polymethyl methacrylate@poly(hydroxyethyl acrylate-hydroxyethyl methacrylate) (PMAA@P(HEA-HEMA)), poly(styrene-methacrylic acid)@poly(ethyl acrylate-methacrylic acid) (P(St-MAA)@P(EA-MAA)) nanospheres. Inorganic colloidal nanoparticles of silica (SiO2), titanium dioxide (TiO2), zirconium oxide (ZrO) nanoparticles, or Any one of organic@inorganic and inorganic@organic colloidal nanospheres, polystyrene@silica (PS@SiO2) and silica@polystyrene (SiO2@PS) nanospheres.

3. The preparation method according to claim 1, wherein: The charge effect modifier in S2 is applied by dipping, padding or coating.

4. The preparation method according to claim 1, wherein: The hydrophobic fabric described in S2 has a water contact angle of 110° to 180°.

5. The preparation method according to claim 1, wherein: The nano-microsphere printing paste described in S3 is applied by blade coating or spraying.

6. The preparation method according to claim 1, wherein: The heating assembly described in S4 has an assembly temperature of 40 to 130° C. and an assembly time of 3 to 60 minutes.

7. The preparation method according to claim 1, wherein: The fabric is selected from polyester fabric, nylon fabric, cotton fabric, silk fabric, polyester-cotton blended fabric or polyester-spandex blended fabric.

8. A textile having an irregular photonic crystal texture pattern produced according to the preparation method of claim 1.

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