Nylon fabric color fixing agent and preparation method thereof

Abstract

The invention provides a nylon fabric color fixing agent and a preparation method thereof, the color fixing agent comprises a bio-based compound and a nano barrier component, the bio-based color fixing component is a compound formed by quaternized chitosan, tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystalline-ZIF-8-coated SiO2 core-shell particles. The color fixing agent disclosed by the invention avoids the use of bisphenol compounds in the traditional color fixing process, and has the characteristic of environmental protection.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textile fabrics, in particular to a nylon fabric color fixing agent and a preparation method thereof. BACKGROUND

[0002] Nylon materials are widely used in engineering plastics, fibers and packaging due to their excellent mechanical properties and chemical resistance. However, the dyeing process is easily affected by dye diffusion and thermal stability. Existing patents such as CN107724124A propose a gemini surfactant composite color fixing agent, which enhances the adsorption capacity of acid dyes through the synergistic effect of quaternary ammonium salt cations and nonionic surfactants. CN106930125A uses fatty amine and urea to construct a multi-copolymer system to further optimize the balance of color fastness and hand feeling. However, these methods still face challenges such as high cost, complex process and insufficient compatibility with specific dyes in practical application, which drives the demand for the development of new color fixing agents.

[0003] In recent years, with the tightening of environmental regulations, nylon color fixing agents need to consider functionality and sustainability. For example, the patent of Jinfa Technology achieves a synergistic improvement in low fluorescence intensity and high color value by compounding perylene and DPP pigments, while reducing the color difference after water boiling. In addition, DELI GF-1 and other formaldehyde-free color fixing agents avoid the health risks of traditional formaldehyde-based auxiliaries by optimizing the formula design, providing a safer solution for nylon dyeing. These technological advancements indicate that the innovation direction of nylon color fixing agents is evolving from single physical encapsulation to multifunctional composite systems to meet the development trend of high performance, low cost and green. SUMMARY

[0004] The technical problem to be solved: The present application provides a nylon fabric color fixing agent and a preparation method thereof, which contains a bio-based composite and a nano-barrier component, avoiding the use of traditional bisphenol compounds in the color fixing process, and having environmental protection characteristics.

[0005] Technical solution: A nylon fabric color fixing agent, which contains a bio-based composite and a nano-barrier component, the bio-based color fixing component is a quaternary ammonium chitosan, a composite formed by tannic acid and zirconium ions, and the nano-barrier component is cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0006] Preferably, the preparation method of the bio-based composite comprises the following steps: S1. Dissolve chitosan in acetic acid solution and add glycidyl trimethyl ammonium chloride, heat to obtain quaternary ammonium chitosan; S2. Add tannic acid and ZrOCl2 to the mixed solution obtained in S1, and heat to obtain a bio-based composite.

[0007] Preferably, the preparation method of the cellulose nanocrystal-ZIF-8@SiO2 core-shell particles comprises the following steps: S11. Cellulose nanocrystals are added to water, and after ultrasonic dispersion, a cellulose nanocrystal / water dispersion is obtained; S12. Zn(NO3)2·6H2O and 2-methylimidazole are added to the cellulose nanocrystal / water dispersion obtained in S11, and after heating reaction, TEOS is added, and after adjusting the pH of the solution by adding ammonia water, cellulose nanocrystal-ZIF-8@SiO2 core-shell particles are obtained.

[0008] Preferably, the volume fraction of the acetic acid solution in S1 is 1-5%; The addition amount of chitosan in S1 is 10-20wt% of the mass of the acetic acid solution; The mass ratio of chitosan to glycidyltrimethylammonium chloride in S1 is 1:1.5-2; The heating reaction time in S1 is 2-4h, and the temperature is 60-80℃.

[0009] Preferably, the mass ratio of tannic acid to quaternary ammonium chitosan in S2 is 1:5-8; The Zr in ZrOCl2 in S2 4+ The molar ratio of tannic acid is 1:3-5; The heating reaction temperature in S2 is 80-100℃, and the time is 3-5h.

[0010] Preferably, the mass fraction of the cellulose nanocrystal / water dispersion in S11 is 1-5wt%.

[0011] Preferably, the molar ratio of Zn(NO3)2·6H2O to 2-methylimidazole in S12 is 1:4-6; The addition amount of Zn(NO3)2·6H2O and 2-methylimidazole in S12 is 0.1-0.3g per 100mL of dispersion; The heating reaction temperature in S12 is 40-60℃, and the time is 12-20h; The concentration of ammonia water in S12 is 1-2M, and the pH is 10-12.

[0012] Preferably, the use method of the color fixing agent comprises the following steps: S21. The color fixing agent is configured into a color fixing agent working solution with water; S22. The dyed nylon fabric is immersed in the color fixing agent working solution obtained in S21, and after heating treatment, a color fixed nylon fabric is obtained.

[0013] The mass fraction of the color fixing agent working solution in S21 is 2-6wt%.

[0014] The ratio of the immersion bath in S22 is 1:10-18; The heating treatment time in S22 is 20-40 min, and the temperature is 40-50℃.

[0015] Advantages: The present application has the following advantages: 1. In the present application, the quaternary ammonium chitosan-metal coordination synergistic effect exists in the bio-based fixing agent: the quaternary ammonium group (-N+(CH3)3) neutralizes the charge of the dye, and Zr 4 ⁺-TA ligand forms a three-dimensional cross-linked network, which locks the dye inside the fiber, thereby improving the washing fastness of the dyed fabric; in addition, tannic acid can not only act as a cross-linking bridge agent, but also impart antibacterial properties to the fabric; 2. In the present application, ZIF-8 microporous adsorbs free dye molecules in the nano-barrier component; the SiO2 shell provides physical barrier, reduces fiber swelling, and the SiO2 shell nanopore barrier prevents water molecules from penetrating, which helps to improve the wet rubbing fastness; the bio-based carrier cellulose nanocrystals can enhance the dispersion of particles, avoiding the hardening of fabric hand caused by nano-agglomeration; 3. In the present application, the bio-based fixing agent is combined with the nano-barrier component, that is, chemical bonding and physical barrier are combined to realize the environmental protection of nylon fabric fixing, avoiding the use of bisphenol compounds in the traditional fixing process, which has environmental protection characteristics and good application prospect. DETAILED DESCRIPTION

[0016] The present application will be further described below in conjunction with examples, which are an explanation of the present application but the present application is not limited to the following examples: Example 1

[0017] A nylon fabric fixing agent, the fixing agent comprises a bio-based compound and a nano-barrier component, the bio-based fixing component is a compound of quaternary ammonium chitosan, tannic acid and zirconium ions, and the nano-barrier component is cellulose nanocrystal-ZIF-8@SiO2 core-shell particle.

[0018] The preparation method of the bio-based compound comprises the following steps: S1. Dissolve chitosan in a 1% acetic acid solution, the addition amount of chitosan is 10wt% of the mass of the acetic acid solution, and glycidyl trimethyl ammonium chloride is added, the mass ratio of chitosan to glycidyl trimethyl ammonium chloride is 1:1.5, and the quaternary ammonium chitosan is obtained by heating at 60℃ for 2h; S2. Add tannic acid and ZrOCl2 to the mixed solution obtained in S1, the mass ratio of tannic acid to quaternary ammonium chitosan is 1:5, and the mass ratio of Zr 4+The bio-based complex was obtained by heating at 80℃ for 3h with a molar ratio of 1:3.

[0019] The preparation method of the cellulose nanocrystal-ZIF-8@SiO2 core-shell particles comprises the following steps: S11. The cellulose nanocrystal was added to water and dispersed by ultrasonic to obtain a cellulose nanocrystal / water dispersion with a mass fraction of 1wt%; S12. The cellulose nanocrystal / water dispersion obtained in S11 was added with Zn(NO3)2·6H2O and 2-methylimidazole at a molar ratio of 1:4, and the addition amount of Zn(NO3)2·6H2O and 2-methylimidazole was 0.1g per 100mL of dispersion. TEOS was added after heating at 40℃ for 12h, and 1M ammonia water was added to adjust the pH of the solution to 10 to obtain cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0020] The use method of the fixing agent comprises the following steps: S21. The fixing agent was configured into a fixing agent working solution with a mass fraction of 3wt% with water; S22. The dyed nylon fabric was immersed in the fixing agent working solution obtained in S21, with a bath ratio of 1:10, and was heated at 40℃ for 20min to obtain a fixing-treated nylon fabric. Example 2

[0021] A fixing agent for nylon fabric, the fixing agent comprises a bio-based complex and a nano barrier component, the bio-based fixing component is quaternary ammonium chitosan, a complex formed by tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0022] The preparation method of the bio-based complex comprises the following steps: S1. Chitosan was dissolved in an acetic acid solution with a volume fraction of 4%, and the addition amount of chitosan was 20wt% of the mass of the acetic acid solution, and glycidyltrimethylammonium chloride was added, and the mass ratio of chitosan to glycidyltrimethylammonium chloride was 1:2, and the quaternary ammonium chitosan was obtained by heating at 80℃ for 4h; S2. Tannic acid and ZrOCl2 were added to the mixed solution obtained in S1, and the mass ratio of tannic acid to quaternary ammonium chitosan was 1:8, and the Zr 4+ The bio-based complex was obtained by heating at 100℃ for 5h with a molar ratio of 1:5.

[0023] The preparation method of the cellulose nanocrystal-ZIF-8@SiO2 core-shell particles comprises the following steps: S11. Cellulose nanocrystals were added to water, and after ultrasonic dispersion, a cellulose nanocrystal / water dispersion with a mass fraction of 5wt% was obtained; S12. Zn(NO3)2·6H2O and 2-methylimidazole with a molar ratio of 1:6 were added to the cellulose nanocrystal / water dispersion obtained in S11, and the addition amount of Zn(NO3)2·6H2O and 2-methylimidazole was 0.3g per 100mL of dispersion. After heating at 40℃ for 20h, TEOS was added, and after adjusting the pH of the solution by adding 2M ammonia water, cellulose nanocrystal-ZIF-8@SiO2 core-shell particles were obtained.

[0024] The use method of the color fixing agent comprises the following steps: S21. The color fixing agent was configured into a color fixing agent working solution with a mass fraction of 6wt% with water; S22. The dyed nylon fabric was immersed in the color fixing agent working solution obtained in S21, the immersion bath ratio was 1:18, and the color fixing treated nylon fabric was obtained after heating treatment at 50℃ for 40min.

[0025] Example 3 A nylon fabric color fixing agent, the color fixing agent comprises a bio-based compound and a nano barrier component, the bio-based color fixing component is a quaternary ammonium chitosan, a compound formed by tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0026] The preparation method of the bio-based compound comprises the following steps: S1. Chitosan was dissolved in an acetic acid solution with a volume fraction of 4%, the addition amount of chitosan was 15wt% of the mass of the acetic acid solution, and glycidyltrimethylammonium chloride was added, the mass ratio of chitosan to glycidyltrimethylammonium chloride was 1:1.8, and heating reaction was carried out at 70℃ for 3h to obtain quaternary ammonium chitosan; S2. Tannic acid and ZrOCl2 were added to the mixed solution obtained in S1, the mass ratio of tannic acid to quaternary ammonium chitosan was 1:7, the molar ratio of Zr in ZrOCl2 to tannic acid was 1:4, and heating reaction was carried out at 90℃ for 4h to obtain a bio-based compound. 4+

[0027] The preparation method of the cellulose nanocrystal-ZIF-8@SiO2 core-shell particles comprises the following steps: S11. Cellulose nanocrystals were added to water, and after ultrasonic dispersion, a cellulose nanocrystal / water dispersion with a mass fraction of 2wt% was obtained; ​S12. To the cellulose nanocrystal / water dispersion obtained in S11, Zn(NO3)2·6H2O and 2-methylimidazole with a molar ratio of 1:5 were added, the addition amount of Zn(NO3)2·6H2O and 2-methylimidazole was 0.12 g per 100 mL of dispersion, after heating at 50°C for 15 h, TEOS was added, and after adjusting the pH of the solution to 10 by adding ammonia water with a concentration of 1.5 M, cellulose nanocrystal-ZIF-8@SiO2core-shell particles were obtained.

[0028] The use method of the color fixing agent comprises the following steps: S21. The color fixing agent was configured with water to obtain a color fixing agent working solution with a mass fraction of 3wt%; S22. The dyed nylon fabric was immersed in the color fixing agent working solution obtained in S21, the immersion bath ratio was 1:15, and the dyed nylon fabric was obtained after heating treatment at 45°C for 35 min.

[0029] Example 4 A color fixing agent for nylon fabric, the color fixing agent comprises a bio-based compound and a nano barrier component, the bio-based color fixing component is a quaternary ammonium chitosan, a compound formed by tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystal-ZIF-8@SiO2core-shell particles.

[0030] The preparation method of the bio-based compound comprises the following steps: S1. Chitosan was dissolved in an acetic acid solution with a volume fraction of 2%, the addition amount of chitosan was 18wt% of the mass of the acetic acid solution, glycidyltrimethylammonium chloride was added, the mass ratio of chitosan to glycidyltrimethylammonium chloride was 1:1.6, and heating reaction was carried out at 75°C for 2h to obtain quaternary ammonium chitosan; S2. Tannic acid and ZrOCl2 were added to the mixed solution obtained in S1, the mass ratio of tannic acid to quaternary ammonium chitosan was 1:6, the molar ratio of Zr in ZrOCl2 to tannic acid was 1:4, and heating reaction was carried out at 90°C for 4h to obtain a bio-based compound. 4+

[0031] The preparation method of the cellulose nanocrystal-ZIF-8@SiO2core-shell particles comprises the following steps: S11. Cellulose nanocrystals were added to water, and after ultrasonic dispersion, a cellulose nanocrystal / water dispersion with a mass fraction of 3wt% was obtained; ​S12. To the cellulose nanocrystal / water dispersion obtained in S11, Zn(NO3)2·6H2O and 2-methylimidazole with a molar ratio of 1:5 were added, the addition amount of Zn(NO3)2·6H2O and 2-methylimidazole was 0.2 g per 100 mL of dispersion, TEOS was added after heating at 40℃ for 18 h, and ammonia water with a concentration of 1M was added to adjust the pH of the solution to 10 to obtain cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0032] The use method of the color fixing agent comprises the following steps: S21. The color fixing agent was configured into a color fixing agent working solution with a mass fraction of 4wt%; S22. The dyed nylon fabric was immersed in the color fixing agent working solution obtained in S21, the immersion bath ratio was 1:16, and the dyed nylon fabric was obtained after heating treatment at 45℃ for 25 min. Example 5

[0033] A color fixing agent for nylon fabric, the color fixing agent comprises a bio-based compound and a nano barrier component, the bio-based color fixing component is a quaternary ammonium chitosan, a compound formed by tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0034] The preparation method of the bio-based compound comprises the following steps: S1. Chitosan was dissolved in an acetic acid solution with a volume fraction of 2%, the addition amount of chitosan was 15wt% of the mass of the acetic acid solution, glycidyltrimethylammonium chloride was added, the mass ratio of chitosan to glycidyltrimethylammonium chloride was 1:1.5, and heating reaction was carried out at 65℃ for 3h to obtain quaternary ammonium chitosan; S2. Tannic acid and ZrOCl2 were added to the mixed solution obtained in S1, the mass ratio of tannic acid to quaternary ammonium chitosan was 1:6, the molar ratio of Zr in ZrOCl2 to tannic acid was 1:4, and heating reaction was carried out at 95℃ for 2h to obtain a bio-based compound. 4+

[0035] The preparation method of the cellulose nanocrystal-ZIF-8@SiO2 core-shell particles comprises the following steps: S11. Cellulose nanocrystals were added to water, and a cellulose nanocrystal / water dispersion with a mass fraction of 2wt% was obtained after ultrasonic dispersion; ​S12. To the cellulose nanocrystal / water dispersion obtained in S11, Zn(NO3)2·6H2O and 2-methylimidazole were added in a molar ratio of 1:4, and the addition amount of Zn(NO3)2·6H2O and 2-methylimidazole was 0.2 g per 100 mL of dispersion. After heating at 55°C for 15 h, TEOS was added, and ammonia water with a concentration of 1M was added to adjust the pH of the solution to 11 to obtain cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0036] The use method of the color fixing agent comprises the following steps: S21. The color fixing agent is configured into a color fixing agent working solution with a mass fraction of 4wt%; S22. The dyed nylon fabric is immersed in the color fixing agent working solution obtained in S21, the immersion bath ratio is 1:16, and the dyed nylon fabric is obtained after heating treatment at 45°C for 35 min.

[0037] Example 6 A color fixing agent for nylon fabric, the color fixing agent comprises a bio-based compound and a nano barrier component, the bio-based color fixing component is a quaternary ammonium chitosan, a compound formed by tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0038] The preparation method of the bio-based compound comprises the following steps: S1. Chitosan is dissolved in an acetic acid solution with a volume fraction of 1%, the addition amount of chitosan is 10wt% of the mass of the acetic acid solution, and glycidyltrimethylammonium chloride is added, the mass ratio of chitosan to glycidyltrimethylammonium chloride is 1:1.6, and heating reaction is carried out at 65°C for 3h to obtain quaternary ammonium chitosan; S2. Tannic acid and ZrOCl2 are added to the mixed solution obtained in S1, the mass ratio of tannic acid to quaternary ammonium chitosan is 1:6, and the molar ratio of Zr in ZrOCl2 to tannic acid is 1:4, and heating reaction is carried out at 85°C for 4h to obtain a bio-based compound. 4+

[0039] The preparation method of the cellulose nanocrystal-ZIF-8@SiO2 core-shell particles comprises the following steps: S11. Cellulose nanocrystals are added to water, and after ultrasonic dispersion, a cellulose nanocrystal / water dispersion with a mass fraction of 2wt% is obtained; ​S12. To the cellulose nanocrystal / water dispersion obtained in S11, Zn(NO3)2·6H2O and 2-methylimidazole with a molar ratio of 1:5 were added, the addition amount of Zn(NO3)2·6H2O and 2-methylimidazole was 0.2 g per 100 mL of dispersion, after heating at 55℃ for 15 h, TEOS was added, and after adjusting the pH of the solution to 10 by adding 1M ammonia water, cellulose nanocrystal-ZIF-8@SiO2 core-shell particles were obtained.

[0040] The use method of the color fixing agent comprises the following steps: S21. The color fixing agent was configured into a color fixing agent working solution with a mass fraction of 4wt%; S22. The dyed nylon fabric was immersed in the color fixing agent working solution obtained in S21, the immersion bath ratio was 1:15, and the dyed nylon fabric was obtained after heating treatment at 45℃ for 30 min. Example 7

[0041] A color fixing agent for nylon fabric, the color fixing agent comprises a bio-based compound and a nano barrier component, the bio-based color fixing component is a quaternary ammonium chitosan, a compound formed by tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0042] The preparation method of the bio-based compound comprises the following steps: S1. Chitosan was dissolved in an acetic acid solution with a volume fraction of 4%, the addition amount of chitosan was 15wt% of the mass of the acetic acid solution, glycidyltrimethylammonium chloride was added, the mass ratio of chitosan to glycidyltrimethylammonium chloride was 1:1.6, and heating reaction was carried out at 70℃ for 3h to obtain quaternary ammonium chitosan; S2. Tannic acid and ZrOCl2 were added to the mixed solution obtained in S1, the mass ratio of tannic acid to quaternary ammonium chitosan was 1:6, the molar ratio of Zr in ZrOCl2 to tannic acid was 1:3, and heating reaction was carried out at 90℃ for 4h to obtain a bio-based compound. 4+

[0043] The preparation method of the cellulose nanocrystal-ZIF-8@SiO2 core-shell particles comprises the following steps: S11. Cellulose nanocrystals were added to water, and after ultrasonic dispersion, a cellulose nanocrystal / water dispersion with a mass fraction of 1wt% was obtained; ​S12. To the cellulose nanocrystal / water dispersion obtained in S11, Zn(NO3)2·6H2O and 2-methylimidazole with a molar ratio of 1:5 were added, the addition amount of Zn(NO3)2·6H2O and 2-methylimidazole was 0.2 g per 100 mL of dispersion, TEOS was added after heating at 55°C for 18 h, and ammonia water with a concentration of 1M was added to adjust the pH of the solution to 10 to obtain cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0044] The use method of the color fixing agent comprises the following steps: S21. The color fixing agent was configured with water to obtain a color fixing agent working solution with a mass fraction of 3wt%; S22. The dyed nylon fabric was immersed in the color fixing agent working solution obtained in S21, the immersion bath ratio was 1:15, and the color fixing treated nylon fabric was obtained after heating treatment at 45°C for 30 min. Example 8

[0045] A color fixing agent for nylon fabric, the color fixing agent comprises a bio-based compound and a nano barrier component, the bio-based color fixing component is a quaternary ammonium chitosan, a compound formed by tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0046] The preparation method of the bio-based compound comprises the following steps: S1. Chitosan was dissolved in a 3% acetic acid solution, the addition amount of chitosan was 18wt% of the mass of the acetic acid solution, and glycidyltrimethylammonium chloride was added, the mass ratio of chitosan to glycidyltrimethylammonium chloride was 1:1.6, and the quaternary ammonium chitosan was obtained after heating at 65°C for 3h; S2. Tannic acid and ZrOCl2 were added to the mixed solution obtained in S1, the mass ratio of tannic acid to quaternary ammonium chitosan was 1:6, and the molar ratio of Zr 4+ in ZrOCl2 to tannic acid was 1:4, and the bio-based compound was obtained after heating at 90°C for 3h.

[0047] The preparation method of the cellulose nanocrystal-ZIF-8@SiO2 core-shell particles comprises the following steps: S11. Cellulose nanocrystals were added to water, and a cellulose nanocrystal / water dispersion with a mass fraction of 1wt% was obtained after ultrasonic dispersion; S12. To the cellulose nanocrystal / water dispersion obtained in S11, Zn(NO3)2·6H2O and 2-methylimidazole were added in a molar ratio of 1:5, and the amount of Zn(NO3)2·6H2O and 2-methylimidazole added was 0.2 g per 100 mL of dispersion. After heating at 50°C for 18 h, TEOS was added, and ammonia water with a concentration of 1 M was added to adjust the pH of the solution to 12 to obtain cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

[0048] The use method of the color fixing agent comprises the following steps: S21. The color fixing agent was configured into a color fixing agent working solution with a mass fraction of 4wt%; S22. The dyed nylon fabric was immersed in the color fixing agent working solution obtained in S21, the immersion bath ratio was 1:14, and the dyed nylon fabric was treated at 40°C for 30 min to obtain a color fixed nylon fabric. Comparative Example 1

[0049] The difference between this comparative example and Example 8 is that the color fixing agent only uses a bio-based compound without using a nano-barrier component when used. Comparative Example 2

[0050] The difference between this comparative example and Example 8 is that the color fixing agent only uses a nano-barrier component without using a bio-based compound when used. Comparative Example 3

[0051] The difference between this comparative example and Example 8 is that the bio-based color fixing component is chitosan, and the compound formed by tannic acid and zirconium ions. Comparative Example 4

[0052] The difference between this comparative example and Example 8 is that the nano-barrier component is ZIF-8@SiO2 core-shell particles without adding cellulose nanocrystals. Comparative Example 5

[0053] The difference between this comparative example and Example 8 is that the nano-barrier component does not contain SiO2 component. Performance Test

[0054] The color fastness to rubbing performance test was performed on the obtained examples and comparative examples of the present application, and the results are shown in the following table.

[0055]

[0056] Note: 1. Rubbing fastness is an important indicator to measure the ability of the color of dyed fabric to keep under the action of friction, mainly divided into dry friction and wet friction two types. When testing, the standard white cotton cloth is rubbed with the sample, and the color fastness is better as the grade is higher according to the color degree of the white cloth; 2. In the present application, the rubbing fastness performance test refers to GB / T 3920-2024 "Textile color fastness test rubbing fastness".

[0057] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A nylon fabric color fixative, characterized by: The fixing agent comprises a bio-based complex and a nano barrier component, the bio-based fixing component is a quaternary ammonium chitosan, a complex of tannic acid and zirconium ions, and the nano barrier component is cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

2. The method for preparing the nylon fabric color-fixing agent according to claim 1, characterized in that: The preparation method of the bio-based complex comprises the following steps: S1. Dissolve chitosan in an acetic acid solution, add glycidyltrimethylammonium chloride, and heat to obtain quaternary ammonium chitosan; S2. Add tannic acid and ZrOCl2 to the mixed solution obtained in S1, and heat to obtain a bio-based complex.

3. The method for preparing the nylon fabric color-fixing agent according to claim 1, characterized in that: The preparation method of the cellulose nanocrystal-ZIF-8@SiO2 core-shell particles comprises the following steps: S11. Add cellulose nanocrystals to water, and ultrasonically disperse to obtain a cellulose nanocrystal / water dispersion; S12. Add Zn(NO3)2·6H2O and 2-methylimidazole to the cellulose nanocrystal / water dispersion obtained in S11, heat to add TEOS, adjust the pH of the solution by adding ammonia water to obtain cellulose nanocrystal-ZIF-8@SiO2 core-shell particles.

4. The method for preparing the nylon fabric color-fixing agent according to claim 2, characterized in that: The volume fraction of the acetic acid solution in S1 is 1-5%; And / or, the addition amount of chitosan in S1 is 10-20wt% of the mass of the acetic acid solution; And / or, the mass ratio of chitosan to glycidyltrimethylammonium chloride in S1 is 1:1.5-2; And / or, the heating reaction in S1 is carried out for 2-4h at a temperature of 60-80℃.

5. The method for preparing the nylon fabric color-fixing agent according to claim 2, characterized in that: The mass ratio of tannic acid to quaternary ammonium chitosan in S2 is 1:5-8; and / or, Zr in the S2 ZrOCl2 4+ molar ratio with tannic acid is 1:3~5; And / or, the heating reaction in S2 is carried out at a temperature of 80-100℃ for 3-5h.

6. The method for preparing the nylon fabric color-fixing agent according to claim 3, characterized in that: The mass fraction of the cellulose nanocrystal / water dispersion in S11 is 1-5wt%.

7. The method for preparing the nylon fabric color-fixing agent according to claim 3, characterized in that: The molar ratio of Zn(NO3)2·6H2O to 2-methylimidazole in S12 is 1:4-6; And / or, the addition amount of Zn(NO3)2·6H2O and 2-methylimidazole in S12 is 0.1-0.3g per 100mL of dispersion; And / or, the heating reaction in S12 is carried out at a temperature of 40-60℃ for 12-20h; And / or, the concentration of ammonia water in S12 is 1-2M, and the pH is 10-12.

8. The fixing agent obtained in any one of claims 1 to 3, characterized by: The use method of the fixing agent comprises the following steps: S21. Prepare a fixing agent working solution by mixing the fixing agent with water; S22. Dip the dyed nylon fabric into the fixing agent working solution obtained in S21, and heat to obtain a fixing-treated nylon fabric.

9. The method of using the fixative of claim 8, wherein: The mass fraction of the fixing agent working solution in S21 is 2-6wt%.

10. The method of using the fixative of claim 8, wherein: The dipping bath ratio in S22 is 1:10-18; And / or, the heating treatment in S22 is carried out for 20-40min at a temperature of 40-50℃.

Images