Photoluminescent fabric and preparation method thereof

Abstract

The present invention belongs to the technical field of functional fabrics, and relates to a photoluminescent fabric and a preparation method thereof. S1. Soak the cotton fabric in an ethanol solution, then wash it with water and air dry it; S2. Treat the cotton fabric obtained in step S1 in a polyacrylamide solution, rinse it with distilled water and dry it, and treat it with a polyeuropium tungstate solution, rinse it with distilled water and dry it; S3. Repeat step S2 for 1 to 5 times to obtain a photoluminescent fabric, which has excellent photoluminescent properties.

Description

Technical Field

[0001] The invention belongs to the technical field of functional fabrics and relates to a photoluminescent fabric and a preparation method thereof. Background Art

[0002] Fluorescent fabrics refer to ordinary fabrics that have a strong reflective effect after being fluorescently dyed or coated. The use of fluorescent fabrics can make targets at a very far distance or in the dark receive strong reflected light, thus playing a good warning and safety prevention role. At present, fluorescent fabrics are mainly chemical fibers, and cotton and linen basically use fluorescent coatings through adhesives to achieve the purpose of dyeing, mainly organic luminescent materials. Compared with luminescent organic materials, lanthanide compound-type luminescent materials have attracted more and more attention due to their larger Stokes shift, narrower linear emission and longer life.

[0003] Polyoxometalates are well-defined nanoscale metal oxygen clusters with rich metal elements and diverse frameworks. Importantly, polyoxometalates are an important class of inorganic ligands that can coordinate with lanthanide elements to improve their luminescence properties. Therefore, lanthanide polyoxometalates are excellent building blocks for constructing smart luminescent materials. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a photoluminescent fabric and a preparation process thereof, wherein the fabric has excellent photoluminescent properties.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A method for preparing a photoluminescent fabric comprises the following steps:

[0007] S1. Soak the cotton fabric in an ethanol solution, then wash it with water and dry it;

[0008] S2. The cotton fabric obtained in step S1 is treated in a polyacrylamide solution, rinsed with distilled water and dried, treated with a polyeuropium tungstate solution, rinsed with distilled water and dried;

[0009] S3. Repeat step S2 1 to 5 times to obtain a photoluminescent fabric.

[0010] Furthermore, in step S2, the treatment in the polyacrylamide solution is specifically: immersing in the polyacrylamide solution for 30 minutes.

[0011] Furthermore, in step S2, the treatment with the polyeuropium tungstate solution is specifically: immersing in the polyeuropium tungstate solution for 30 minutes.

[0012] Further, the polyeuropium tungstate is Na 9 EW 10 O36 .

[0013] Furthermore, in step S2, the concentration of the polyacrylamide solution is 5 to 35 g / L.

[0014] Furthermore, in step S2, the polyeuropium tungstate solution is 10-90 g / L.

[0015] Furthermore, the drying temperature is 60°C.

[0016] The invention also provides the photoluminescent fabric prepared by the above-mentioned preparation method.

[0017] Compared with the prior art, in the technical solution provided by the present invention, the europium decatungstate anion ([EuW 10 O 39 ] 9- ) exhibits excellent luminescence performance. In its structure, Eu 3+ ions and two [W 5 O 18 ] 6- Ligand coordination, showing typical Eu 3+ The emission characteristic peak of Eu 3+ ions to [W 5 O 18 ] 6- energy transfer; the introduction of polyelectrolytes can interact with negatively charged polyoxometalates through electrostatic interactions, thereby being fixed on the fabric, giving the fabric excellent photoluminescence properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 for Na 9 EW 10 O 36 Infrared spectrum of

[0019] Figure 2 The emission wavelength diagram of fabrics prepared with polyacids of different concentrations under 306nm excitation, wherein the upper left is the enlarged emission spectrum diagram at 10g / L, and the upper right is the enlarged emission spectrum diagram at 30g / L;

[0020] Figure 3 These are the scanning electron microscope images and mapping test images of the fabric in Example 3, where (a, b) are scanning electron microscope images of the fabric; and (cf) are mapping images of the distribution of each element. DETAILED DESCRIPTION

[0021] The present invention can be better understood according to the following examples. However, it is easy for those skilled in the art to understand that the contents described in the examples are only used to illustrate the present invention, and should not and will not limit the present invention described in detail in the claims.

[0022] Example 1

[0023] The compound was prepared according to the literature (Bulletin of the Chemical Society of Japan, 1993, 66 (2): 444-449), and the compound molecular formula is Na 9 EW 10 O 36 The structure was confirmed by infrared spectroscopy and X-ray single crystal diffraction, and the samples were collected, ground and set aside. The infrared spectrum of the compound was tested by potassium bromide tablets, and by comparing with the literature, it was confirmed that the synthesized compound was Na 9 EW 10 O 36 The infrared spectrum of the compound is shown in Figure 1 shown.

[0024] Example 2

[0025] Step 1: Soak the cotton fabric in an ethanol solution, then wash it with water, dry it and set it aside.

[0026] Step 2: Weigh a certain amount of Na 9 EW 10 O 36 , dissolve it in water to make a Na 9 EW 10 O 36 Solution.

[0027] Step 3, dissolve polyacrylamine hydrochloride in water, stir for 30 minutes, and prepare a 20g / L solution;

[0028] Step 4: immerse the cotton fabric (5*5 cm) obtained in step 2) in the polyacrylamide solution obtained in step 4) for 30 min, rinse with distilled water, and then dry at 60°C; immerse the obtained fabric in Na 9 EW 10 O 36 The solution was kept for 30 min, then rinsed with distilled water and dried at 60 °C.

[0029] Step 5. Repeat step 4 twice.

[0030] Example 3

[0031] Step 1: Soak the cotton fabric in an ethanol solution, then wash it with water, dry it and set it aside.

[0032] Step 2: Weigh a certain amount of Na 9 EW 10 O 36 , dissolve it in water to make 30g / L.

[0033] Step 3, dissolving polyacrylamine hydrochloride in water, stirring for 30 minutes, and preparing a 20 g / L polyacrylamine hydrochloride solution;

[0034] Step 4, immerse the cotton fabric (5*5 cm) obtained in step 2) in the polyacrylamide solution obtained in step 4) for 30 minutes, rinse with distilled water, and then dry at 60°C; immerse the obtained fabric in polyeuropium tungstate for 30 minutes, rinse with distilled water, and then dry at 60°C;

[0035] Step 5. Repeat step 4 twice.

[0036] Example 4

[0037] Step 1: Soak the cotton fabric in ethanol solution, then wash it with water, dry it and set it aside.

[0038] Step 2: Weigh a certain amount of Na 9 EW 10 O 36 , dissolve it in water to make 50g / L.

[0039] Step 3, dissolving polyacrylamide in water, stirring for 30 minutes, and ultrasonicating for 30 minutes to prepare a 20 g / L polyacrylamide solution;

[0040] Step 4, immerse the cotton fabric (5*5 cm) obtained in step 2) in the polyacrylamide solution obtained in step 4) for 30 minutes, rinse with distilled water, and then dry at 60°C; immerse the obtained fabric in polyeuropium tungstate for 30 minutes, rinse with distilled water, and then dry at 60°C;

[0041] Step 5. Repeat step 4 twice.

[0042] Example 5

[0043] Step 1: Soak the cotton fabric in an ethanol solution, then wash it with water, dry it and set it aside.

[0044] Step 2: Weigh a certain amount of Na 9 EW 10 O 36 , dissolve it in water to make 70g / L.

[0045] Step 3, dissolving polyacrylamide in water, stirring for 30 minutes, and ultrasonicating for 30 minutes to prepare a 20 g / L polyacrylamide solution;

[0046] Step 4, immerse the cotton fabric of 5*5 cm obtained in step 2) in the polyacrylamide solution obtained in step 4) for 30 minutes, rinse with distilled water, and then dry at 60°C; immerse the obtained fabric in polyeuropium tungstate for 30 minutes, rinse with distilled water, and then dry at 60°C; this process is recorded as one layer;

[0047] Step 5. Repeat step 4 twice.

[0048] Example 6

[0049] Step 1: Soak the cotton fabric in an ethanol solution, then wash it with water, dry it and set it aside.

[0050] Step 2: Weigh a certain amount of Na 9 EW 10 O 36 , dissolve it in water to make 90g / L.

[0051] Step 3, dissolving polyacrylamide in water, stirring for 30 minutes, and ultrasonicating for 30 minutes to prepare a 20 g / L polyacrylamide solution;

[0052] Step 4, immerse the cotton fabric of 5*5 cm obtained in step 2) in the polyacrylamide solution obtained in step 4) for 30 minutes, rinse with distilled water, and then dry at 60°C; immerse the obtained fabric in polyeuropium tungstate for 30 minutes, rinse with distilled water, and then dry at 60°C; this process is recorded as one layer;

[0053] Step 5. Repeat step 4.

[0054] Test Example 1

[0055] The fluorescence performance of the fabric in Example 1 was tested using a fluorescence spectrometer, with excitation at 306 nm. The results are as follows: Figure 2 As shown in the figure, it can be seen that when Na 9 EW 10 O 36 When the concentration is 50g / L, the fluorescence intensity is the highest. The corresponding emission wavelength of 577nm belongs to 5 D 0 → 7 F 0 , 588 and 593 belong to 5 D 0 → 7 F 1 , 607, 615, 619nm belong to 5 D 0 → 7 F 2 , 650nm belongs to 5 D 0 →7 F 3 , 691, 705nm belongs to 5 D 0 → 7 F 4 In addition, under the conditions of 300nm excitation and 607nm emission, the fluorescence lifetime of the fabric was tested to be 3.0ms.

[0056] Scanning electron microscopy and mapping tests were performed on the fabric in Example 3 to confirm that Na 9 EW 10 O 36 Loaded successfully.

Claims

1. A method for preparing a photoluminescent fabric, characterized in that: The preparation method comprises the following steps: S1. Soak the cotton fabric in an ethanol solution, then wash it with water and dry it; S2. The cotton fabric obtained in step S1 is immersed in a polyacrylamide solution for 30 minutes, rinsed with distilled water and then dried, and then immersed in a polyeuropium tungstate solution for 30 minutes, rinsed with distilled water and then dried, wherein the concentration of the polyacrylamide solution is 5 to 35 g / L, and the concentration of the polyeuropium tungstate solution is 10 to 90 g / L; S3. Repeat step S2 1 to 5 times to obtain a photoluminescent fabric.

2. The preparation method according to claim 1, characterized in that: The polyeuropium tungstate is Na9EuW 10 O 36 .

3. The preparation method according to claim 1, characterized in that: The drying temperature is 60°C.

4. A photoluminescent fabric prepared by the preparation method according to any one of claims 1 to 3.

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