Preparation method of heterogeneous bimetal MOFs modified composite textile material and NH3 adsorption, sterilization and anti-ultraviolet application of heterogeneous bimetal MOFs modified composite textile material

Abstract

The invention provides a preparation method of a heterogeneous bimetal MOFs (Metal-Organic Frameworks) modified composite textile material and NH3 adsorption, sterilization and ultraviolet resistance application of the heterogeneous bimetal MOFs modified composite textile material. The method comprises the following steps: firstly, carrying out surface carboxylation treatment on a textile material, then constructing stable bimetal MOFs (Cu / Ti-MV-102) on the surface of the textile material by adopting a layer-by-layer self-assembly method and utilizing Lewis acidity, charge and bond energy differences of hard metal (Ti < 4 + >) and soft metal (Cu < 2 + >), and finally preparing the heterogeneous bimetal MOFs modified composite textile material with NH3 adsorbability, bactericidal activity and ultraviolet resistance at the same time.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of functional textile material preparation, and in particular to a preparation method of a composite textile material modified by heterogeneous bimetallic MOFs and NH3 adsorption, sterilization and ultraviolet resistance applications of the composite textile material. BACKGROUND

[0002] NH3 is a pungent, toxic and corrosive gas, which can cause irritation and serious damage to the skin, eyes, respiratory tract and lungs even at a concentration as low as 50 ppm. Therefore, it is crucial to reduce the concentration of NH3 in the environment, especially indoor NH3 concentration.

[0003] At present, adsorption and catalysis play an important role in NH3 treatment. Metal-organic frameworks (MOFs) have shown potential in NH3 adsorption due to their high specific surface area, adjustable pore size and chemical diversity. However, existing MOFs still face bottlenecks in NH3 adsorption. First, the capture efficiency of adsorbents for low-concentration NH3 is insufficient, and the powder form cannot meet the actual application requirements. Second, single-metal MOFs have poor stability, and after the adsorbent adsorbs NH3 in harsh environments (such as high humidity conditions), the metal-ligand bond will break due to strong coordination, and the adsorption is unstable, which cannot achieve effective adsorption of NH3.

[0004] Therefore, it is necessary to design an improved preparation method of a composite textile material modified by heterogeneous bimetallic MOFs and NH3 adsorption, sterilization and ultraviolet resistance applications to solve the above problems. SUMMARY

[0005] The application aims to provide a preparation method of a composite textile material modified by heterogeneous bimetallic MOFs and NH3 adsorption, sterilization and ultraviolet resistance applications.

[0006] To achieve the above-mentioned application purposes, in one aspect, the application provides a preparation method of a composite textile material modified by heterogeneous bimetallic MOFs, which comprises the following steps:

[0007] S1, surface carboxylation modification is performed on the textile material to obtain a CFC;

[0008] S2, the CFC obtained in step S1 is sequentially immersed in a Cu precursor solution, a ligand solution and a Ti precursor solution to form a single immersion treatment; after repeating the immersion treatment for 2-20 times, the obtained sample is placed in a beta-cyclodextrin solution and reacted at 50-180 DEG C for 2-20 h to obtain a composite textile material.

[0009] Preferably, in step S2, the soaking time of CFC in the Cu precursor solution is 10-60 min, the soaking time in the ligand solution is 10-60 min, and the soaking time in the Ti precursor solution is 10-60 min.

[0010] Preferably, in step S2, the Cu precursor solution is N,N-dimethylacetamide, ethanol, and copper salt dissolved in water, and the concentration is 0.1-1 mol / L; the volume ratio of N,N-dimethylacetamide, ethanol, and water in the Cu precursor solution is 1:1:1-1:5:10.

[0011] Preferably, in step S2, the ligand solution is obtained by mixing N,N-dimethylacetamide, 1,3,5-benzene tricarboxylic acid, ethanol, and water, the concentration of N,N-dimethylacetamide in the ligand solution is 0.1-0.5 mol / L, and the mass ratio of N,N-dimethylacetamide to 1,3,5-benzene tricarboxylic acid is 1:1-1:10; the volume ratio of ethanol to water in the ligand solution is 1:1-1:10.

[0012] Preferably, in step S2, the Ti precursor solution is obtained by mixing N,N-dimethylacetamide, ethanol, water, and isopropyl titanate, and the concentration is 0.05-0.5 mol / L; the volume ratio of N,N-dimethylacetamide, ethanol, and water in the Ti precursor solution is 1:1:1-1:5:10.

[0013] Preferably, in step S2, the β-cyclodextrin solution is obtained by mixing N,N-dimethylacetamide, ethanol, and β-cyclodextrin, and the ratio of N,N-dimethylacetamide volume, ethanol volume, and β-cyclodextrin mass is 1:5:1-1:20:1.

[0014] Preferably, in step S1, the surface carboxylation modification of the textile material is performed as follows: the textile material is placed in a treatment liquid, treated at 50-120℃ for 0.5-2 h, dried to obtain a pretreated textile material; then, the pretreated textile material is subjected to plasma treatment, soaked in a citric acid solution, and solidified to obtain the CFC.

[0015] Preferably, the treatment liquid is obtained by dissolving NaOH, a surfactant, and sodium citrate in water, the mass ratio of NaOH, the surfactant, and sodium citrate in the treatment liquid is (0.5-5):(0.5-5):(0.2-2), the concentration of sodium citrate in the treatment liquid is 0.5-5 mol / L; the solidification temperature is 90-150℃, and the time is 30-120 min.

[0016] In another aspect, the present application also provides a hetero-bimetallic MOFs modified composite textile material, which can be applied to NH3 adsorption, sterilization and anti-ultraviolet.

[0017] The present application has the following beneficial effects:

[0018] 1. The present application provides a preparation method of the hetero-bimetallic MOFs modified composite textile material, which comprises the following steps: first, performing surface carboxylation treatment on the textile material; then, constructing a stable bimetallic MOFs (Cu / Ti-MUV-102) on the surface of the textile material by using a layer-by-layer self-assembly method; and finally, utilizing the Lewis acidity, charge and bond energy difference between the hard metal (Ti 4+ ) and the soft metal (Cu 2+ ) to regulate the Lewis acidity strength and coordination environment of the MOF metal sites, optimize the material for NH3 coordination adsorption, and enhance the MOF structure stability, fabric stability, moisture resistance and NH3 adsorption performance. In addition, the Cu ion has a sterilization and antibacterial effect, and the Ti ion has a light response performance, so the material has excellent antibacterial and anti-ultraviolet properties. Through the above method, the hetero-bimetallic MOFs modified composite textile material with NH3 adsorption, sterilization and anti-ultraviolet properties can be prepared.

[0019] 2. The preparation method provided by the present application can avoid aggregation during the generation of MOFs, ensure uniform loading of MOFs, and provide more active adsorption sites for NH3 by means of the cavity and open metal sites of the beta-cyclodextrin and the carboxyl sites on the surface of the surface functionalized textile material, thereby greatly improving the adsorption efficiency of NH3.

[0020] 3. Compared with the conventional MOFs loading method, the preparation method provided by the present application has mild synthesis conditions, and the modified textile material still has good mechanical properties and air permeability compared with the original cotton. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Characterization results of CFC and CF prepared in Example 1 of the present application;

[0022] Figure 2 SEM images of CFC and MCFC prepared in Example 1 of the present application;

[0023] Figure 3 FTIR and XRD images of CF, CFC and MCFC prepared in Example 1 of the present application;

[0024] Figure 4 Optical photographs and ultraviolet absorption spectra of CF and CFC before and after loading MOFs in Example 1 of the present application;

[0025] Figure 5 Test results of ammonia adsorption of the MCFC prepared in Example 1 of the present application;

[0026] Figure 6 Test results of antibacterial property and ultraviolet resistance of the MCFC prepared in Example 1 of the present application. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Here, it should also be noted that, in order to avoid obscuring the present application due to unnecessary details, only structures and / or processing steps closely related to the solutions of the present application are shown in the accompanying drawings, and other details not closely related to the present application are omitted.

[0029] In addition, it should also be noted that the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or equipment.

[0030] The present application provides a preparation method of a heterogeneous bimetallic MOFs modified composite textile material, comprising the following steps:

[0031] S1, surface functionalization of the textile material:

[0032] The textile material is placed in a treatment liquid and treated at 50-120℃ for 0.5-2h, and after drying, a pretreated textile material is obtained; then, the textile material is subjected to plasma treatment, and is immersed in a citric acid solution for immersion treatment, and after solidification, a surface functionalized textile material CFC is prepared; through surface modification, more active groups (carboxyl groups, etc.) can be introduced on the surface of the textile material, which is beneficial to subsequent MOFs assembly;

[0033] S2, preparation of a bimetallic organic framework compound Cu / Ti-MUV-102 on the surface of the textile material:

[0034] The CFC obtained in step S1 is sequentially immersed in a Cu precursor solution, a ligand solution and a Ti precursor solution, and the above steps are repeated for 2-20 times, then the obtained sample is placed in a β-cyclodextrin solution and stirred for 30min, and then reacted at 50-180℃ for 2-20h, so that Cu / Ti-MUV-102 is formed on the surface of the textile material, and a heterogeneous bimetallic MOFs modified composite textile material is prepared.

[0035] In the technical solution, the double-metal MOFs (Cu / Ti-MUV-102) are constructed on the surface of the textile material by using the layer-by-layer self-assembly method, the hard metal (Ti 4+ ) and the soft metal (Cu 2+ ) are coupled at the same node, and the stability, water resistance and NH3 adsorption performance of the material are optimized in cooperation, because: Cu and Ti can both coordinate with NH3, when the double metals exist in the material at the same time, the coordination of one metal with NH3 can weaken the coordination of the other metal with NH3 to a certain extent, so that the metal-NH3 coordination bond is not broken due to the strong coordination between the single metal and NH3 under the condition of high-concentration NH3, and the NH3 adsorption performance of the modified textile material is affected; at the same time, the stability and water resistance of the material are improved by means of the synergistic effect between the Cu and Ti nodes, so that the metal-NH3 coordination bond is not broken under the conditions of high humidity and high temperature, and the adsorption performance is not invalid.

[0036] In some embodiments, in step S1, the processing liquid is obtained by dissolving NaOH, a surfactant and sodium citrate in water, and the mass ratio of the three in the processing liquid is (0.5-5):(0.5-5):(0.2-2), and the concentration of sodium citrate is 0.5-5 mol / L. Specifically, in some embodiments, the amount of NaOH added in the processing liquid is 0.5-5 g, the amount of sodium citrate added is 0.5-5 g, and the amount of surfactant added is 0.2-2 g.

[0037] In some embodiments, in step S1, the textile material is a fiber material such as yarn, fabric, etc., such as cotton fiber, etc.

[0038] In some embodiments, in step S1, the time of plasma treatment is 1-20 min, and the time of soaking treatment is 2 h.

[0039] In some embodiments, in step S1, the mass concentration of the citric acid solution is 100-500 g / L.

[0040] In some embodiments, in step S1, the solidification temperature is 90-150 DEG C, and the time is 30-120 min.

[0041] In some embodiments, in step S2, the Cu precursor solution is obtained by dissolving N,N-dimethylacetamide (DMA), ethanol and copper salt in water, the concentration is 0.1-1 mol / L, the volume ratio of N,N-dimethylacetamide, ethanol and water is 1:1:1-1:5:10, and the copper salt can be Cu(NO3)2·3H2O.

[0042] In some embodiments, in step S2, the ligand solution is obtained by mixing DMA, 1,3,5-benzene tricarboxylic acid, ethanol and water, the concentration of DMA in the ligand solution is 0.1-0.5 mol / L, the mass ratio of DMA to 1,3,5-benzene tricarboxylic acid is 1:1-1:10, and the volume ratio of ethanol to water is 1:1-1:10.

[0043] In some embodiments, in step S2, the Ti precursor solution is obtained by mixing N,N-dimethylacetamide, ethanol, water and titanium isopropoxide (TIPO), and the concentration of the Ti precursor solution is 0.05-0.5 mol / L, the volume ratio of N,N-dimethylacetamide, ethanol and water is 1:1:1-1:5:10.

[0044] In some embodiments, in step S2, the β-cyclodextrin solution is obtained by mixing N,N-dimethylacetamide, ethanol and β-cyclodextrin, and the volume ratio of N,N-dimethylacetamide, ethanol and β-cyclodextrin is 1:5:1-1:20:1.

[0045] In some embodiments, in step S2, the soaking time of the CFC in the Cu precursor solution is 10-60 min, the soaking time of the CFC in the ligand solution is 10-60 min, and the soaking time of the CFC in the Ti precursor solution is 10-60 min. In particular, to avoid the influence of the two consecutive soaking processes on the soaking solution, after each soaking process is completed, the textile material is soaked in ethanol for 10-60 s before the next soaking process.

[0046] The preparation method of the composite textile material modified by the heterogeneous bimetallic MOFs and the NH3 adsorption, sterilization and anti-ultraviolet application thereof will be further described below in combination with specific embodiments.

[0047] Embodiment 1

[0048] In this embodiment, a composite textile material modified by heterogeneous bimetallic MOFs is prepared, and the specific preparation method comprises the following steps:

[0049] S1, 5g of NaOH, 1.5g of Triton X-100 and 0.75g of sodium citrate are dissolved in 500ml of deionized water to obtain a treatment solution; according to the requirements, 5g of cotton fabric (CF) is evenly cut and then immersed in the treatment solution, and is placed at 100℃ for 1h, after the soaking is completed, the fabric is taken out, washed with deionized water for 3-5 times, and dried at 60℃ for standby; then, the fabric is subjected to plasma treatment, the treatment time is 5min, and then the fabric is immersed in a citric acid aqueous solution with a mass concentration of 1.5g / mL for 2h, dried at 60℃, and then solidified at 120℃ for 50min to obtain a surface functionalized cotton fabric (CFC);

[0050] S2, 3.8 g Cu(NO3)2·3H2O, N,N-dimethylacetamide, ethanol, deionized water were mixed to prepare a Cu precursor solution of 50 mL, the volume ratio of N,N-dimethylacetamide, ethanol, deionized water was 1:1:1; DMA, ethanol, deionized water and 1.35 g 1,3,5-benzene tricarboxylic acid were mixed to prepare a ligand solution of 50 mL, the volume ratio of DMA, ethanol, deionized water was 1:1:1; DMA, ethanol, deionized water and 50 uL TIPO were mixed to prepare a Ti precursor solution of 50 mL, the volume ratio of DMA, ethanol, deionized water was 1:1:1;

[0051] The Cu precursor solution and the ligand solution were respectively ultrasonically treated for 20 min, a 5 cm×5 cm CFC was immersed in 50 mL of the Cu precursor solution for 15 min, taken out and immersed in ethanol for 10 s, then immersed in the ligand solution for 15 min, taken out and immersed in ethanol for 10 s, finally immersed in the Ti precursor solution for 15 min, taken out and immersed in ethanol for 10 s, the whole immersion process was defined as one cycle, and the process was repeated for 5 cycles;

[0052] After the immersion was completed, the obtained sample was added into a β-cyclodextrin solution, stirred for 30 min to make the sample completely immersed in the solution, and then heated at 150 ℃ for 6 h; after the heating was completed, the fiber was washed with ethanol to remove the unbound particles, and dried at room temperature for 2 h, thereby obtaining a hetero-bimetallic MOFs modified composite textile material, denoted as MCFC.

[0053] The characterization results of the CFC and the CF are shown in Figure 1 , wherein, Figure 1 Fig. (a1) and Fig. (a2) in are SEM images of the CF at different magnifications, Figure 1 Fig. (a3) in is an optical photo of the CF, Figure 1 Fig. (b1) and Fig. (b2) in are SEM images of the CFC at different magnifications, Figure 1 Fig. (b3) in is an optical photo of the CFC, and the results show that the carboxylation makes the CFC slightly yellow and the surface rough. Figure 1 Fig. (c) in is an FTIR graph of the CFC and the CF, by comparing the two graphs, it can be seen that a new absorption peak appears at 1719 cm -1 in the spectrum of the CFC, which is attributed to the extension of CO(COOH) of the carboxylated CF, confirming the formation of CF-COOH, at 3340 cm -1 , 2890 cm -1 , 1640 cm -1 , 1320 cm -1 and 1030 cm -1The other absorption bands at correspond to OH stretching, CH stretching, OH bending, CO bending, and COC stretching, respectively.

[0054] SEM images of CFC and MCFC obtained by loading bimetallic organic framework compound MOFs are shown in Figure 2. Figure 2 As shown, Figure 2 Figure (a) is the SEM image of CF. Figure 2 Figure (b) is the SEM image of CFC. Figure 2 Figure (c) is the SEM image of MCFC. The results show that carboxylation can significantly increase the MOFs loading on the fabric.

[0055] The FTIR and XRD patterns of CF, CFC and MCFC are shown in Figure 2. Figure 3 As shown in Figure (a) and Figure (b), Figure (a) shows that at 1589cm -1 The absorption band observed at 3340 cm corresponds to the carboxylic acid groups introduced into the cellulose chains. -1 、2890cm -1 、1640cm -1 、1320cm -1 and 1030cm -1 The other absorption bands at 773 cm correspond to OH stretching, CH stretching, OH bending, CO bending and COC stretching. In addition to the cellulose peak, MCFC also shows a peak at 773 cm -1 Ti-O peak at 573 cm -1 The Cu-O peak at 17190 cm -1 and 1369cm -1 Unique absorption bands were observed at (220), (200), (222), (400), and (440), which can be attributed to the symmetrical and asymmetrical vibrations of the C=O and CH groups in the trimesic acid linker within MUV-102(Cu-Ti). Figure (b) shows that MCFC exhibits diffraction peaks at (220), (200), (222), (400), and (440), which match those of MUV-102(Cu-Ti) crystals. These results indicate that MCFC was successfully prepared.

[0056] Examples 2 to 3

[0057] The only difference between Examples 2 and 3 and Example 1 is that in step S2, the temperature for heating the reaction to prepare CFC is different from that in Example 1. Specifically, the temperature in Example 2 is 50° C., and the temperature in Example 3 is 100° C. The remaining experimental parameters are the same as those in Example 1 and are not further described here.

[0058] Optical photographs and UV absorption spectra of CF, CF treated with ethanol / DMA, and CFC before and after loading MOFs. Figure 4As shown, Figure 4 Figure a shows the optical photographs of CF, CF treated with ethanol / DMA, and CFC from left to right. Figure 4 Figure b is an optical photograph of the fabric obtained by carboxylation treatment of the corresponding fabric in Figure a (1C represents 1 carboxylation, 3C represents 3 carboxylation). Figure 4 Figure c is an optical photograph of the fabric obtained by loading MOFs on the surface of the carboxylated fabric in Figure b at different temperatures. In this figure, MCFC-5C-50 indicates that the material has undergone 5 cycles of soaking during the preparation process, and the heating reaction temperature is 50°C. The results show that the colors of CF (white), CFC (yellow), and MCFC (blue) gradually become darker, and as the number of MOFs loading layers increases, MCFC gradually changes from light blue to dark blue. Figure 4 Figure d in Figure 3 shows the K / S image of the corresponding fabric, which further confirms the successful loading of MOFs on cotton fabric.

[0059] Furthermore, this example also explores the NH3 adsorption, antibacterial and UV resistance of MCFC. The test process is carried out as follows: under high humidity conditions of RH50, 1g of composite textile material MCFC is placed in an NH3 environment with a concentration of 50ppm and an NH3 flow rate of 200mL / min. The penetration time is used to represent the adsorption capacity. The longer the penetration time, the stronger the adsorption. The test results are as follows: Figure 5 As shown in Figure 2, the MCFC prepared after 5 cycles was compared with Cu-BTC-MCFC (only MOFs containing Cu were loaded on CFC) and pure MUV-102 (Cu-Ti) powder. Figure 5 As shown in Figure (a), the adsorption test results of MCFC-5C-50, MCFC-5C-100, and MCFC-5C-150 are as follows Figure 5 As shown in Figure (b), it was finally concluded that the ammonia adsorption performance of MCFC was optimal, the breakthrough time was 500 minutes, and the hydrothermal temperature was 100°C.

[0060] Antibacterial properties were measured using the GB / T 20944 standard and the oscillation method. The specific test results are as follows: Figure 6 As shown, bacterial activity during the test was counted using CFU, where Figure 6 Figure (a) is the principle diagram of MCFC sterilization. Figure 6 Figure (b) shows the antibacterial activity of CFC and MCFC against Escherichia coli and Staphylococcus aureus. The results show that MCFC showed 99.9% resistance to both bacteria. The actual picture of the antibacterial test process is shown in Figure 2. Figure 6 As shown in Figure (c), the left figure corresponds to MCFC and the right figure corresponds to CF. The results show that the loading of MOFs can significantly improve the antibacterial properties of the material.

[0061] The principle of the anti-UV determination of MCFC is shown in Fig. (d) of Figure 6 , and the UV-vis diagram of CF, CFC, MCFC-5C-50, MCFC-5C-100 and MCFC-5C-150 is shown in Fig. (e) of Figure 6 , the results show that, compared with CFC, the MCFC after MOFs functionalization shows higher UV radiation absorption in the range of 290 to 450 nm; the corresponding UVA, UVB and UPF values of the materials are shown in Fig. (f) of Figure 6 , the results show that CF shows the lowest UPF value, in contrast, MCFC shows UPF value 2-3 times higher than CF, which belongs to good in the anti-UV evaluation grade, it can be seen that the Cu used in the process of MOFs functionalization to give fabric color is more effective in UV absorption.

[0062] The above examples are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A method for preparing a composite textile material modified with heterogeneous bimetallic MOFs, characterized in that: The steps include: S1. Carboxyl modification of the surface of textile materials to obtain CFC; S2. The CFC obtained in step S1 is sequentially immersed in a Cu precursor solution, a ligand solution, and a Ti precursor solution to form a single infiltration treatment; after repeating the infiltration treatment 2-20 times, the obtained sample is placed in a β-cyclodextrin solution and reacted at 50-180°C for 2-20 hours to obtain a composite textile material.

2. The preparation method according to claim 1, characterized in that In step S2, the CFC is immersed in the Cu precursor solution for 10-60 minutes, immersed in the ligand solution for 10-60 minutes, and immersed in the Ti precursor solution for 10-60 minutes.

3. The preparation method according to claim 1, characterized in that In step S2, the Cu precursor solution is obtained by dissolving N,N-dimethylacetamide, ethanol, and copper salt in water, and its concentration is 0.1-1 mol / L; the volume ratio of N,N-dimethylacetamide, ethanol, and water in the Cu precursor solution is 1:1:1-1:5:

10.

4. The preparation method according to claim 1, characterized in that In step S2, the ligand solution is obtained by mixing N,N-dimethylacetamide, 1,3,5-benzenetricarboxylic acid, ethanol, and water. The concentration of N,N-dimethylacetamide in the ligand solution is 0.1-0.5 mol / L, and the mass ratio of N,N-dimethylacetamide to 1,3,5-benzenetricarboxylic acid is 1:1-1:10; the volume ratio of ethanol to water in the ligand solution is 1:1-1:

10.

5. The preparation method according to claim 1, characterized in that In step S2, the Ti precursor solution is obtained by mixing N,N-dimethylacetamide, ethanol, water, and isopropyl titanate, and its concentration is 0.05-0.5 mol / L; the volume ratio of N,N-dimethylacetamide, ethanol, and water in the Ti precursor solution is 1:1:1-1:5:

10.

6. The preparation method according to claim 1, characterized in that In step S2, the β-cyclodextrin solution is obtained by mixing N,N-dimethylacetamide, ethanol, and β-cyclodextrin, and the ratio of the volume of N,N-dimethylacetamide, the volume of ethanol, and the mass of β-cyclodextrin is 1:5:1-1:20:

1.

7. The preparation method according to claim 1, characterized in that In step S1, the surface carboxylation modification of the textile material is carried out as follows: the textile material is placed in a treatment solution, treated at 50-120° C. for 0.5-2 hours, and dried to obtain a pre-treated textile material; then, the pre-treated textile material is subjected to plasma treatment, then immersed in a citric acid solution, and then cured to obtain CFC.

8. The preparation method according to claim 7, characterized in that The treatment liquid is prepared by dissolving NaOH, a surfactant, and sodium citrate in water. The mass ratio of NaOH, the surfactant, and the sodium citrate in the treatment liquid is (0.5-5):(0.5-5):(0.2-2), and the concentration of the sodium citrate in the treatment liquid is 0.5-5 mol / L. The curing temperature is 90-150° C., and the curing time is 30-120 min.

9. A heterogeneous bimetallic MOFs modified composite textile material prepared by the preparation method according to any one of claims 1 to 8.

10. Use of a heterogeneous bimetallic MOFs-modified composite textile material prepared by the preparation method according to any one of claims 1 to 8 or a heterogeneous bimetallic MOFs-modified composite textile material according to claim 9 in NH3 adsorption, sterilization and UV resistance.

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