Zhangzhou camphor satin fabric and preparation process thereof

Abstract

The preparation process comprises the following steps: S1, freezing mulberry silk fibers, and stripping sericin on the surfaces of fibroin fibers in the mulberry silk fibers by utilizing a thermal expansion and cold contraction principle; s2, immersing the silk fibroin fibers subjected to physical sericin stripping into a solution containing a functional dye; s3, dissolving the stripped sericin in an alkaline solution to obtain a sericin solution with the pH value of 8-9, activating the sericin solution, and adding a cross-linking agent into the sericin solution; then uniformly coating the sericin solution on the surface of the fibroin fiber loaded with the anti-radiation dye to form a sericin film; s4, heating and curing the fibroin fibers coated with the sericin films on the surfaces; and S5, spinning and weaving the cleaned and dried fibers in sequence to obtain the finished fabric. The preparation environment is green and environment-friendly, and the obtained finished fabric not only has excellent performance based on functional materials, but also does not affect the touch feeling and softness of protein fibers of the fabric.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and in particular to a Zhang satin fabric and a preparation process thereof. Background Art

[0002] Zhang satin, as a traditional silk fabric with a long history, originated in Zhangzhou area of Fujian Province in the late Ming and early Qing dynasties. It is famous for its unique weaving process and artistic style, and was once one of the high-grade fabrics commonly used by the court nobles. The weaving technique of Zhang satin is extremely exquisite. It is woven with two groups of warp threads and four groups of weft threads, forming a pure silk jacquard velvet fabric with satin as the ground and pile warp for pattern. This fabric not only has a tight texture and bright luster, but also has a strong three-dimensional sense, and is known as the "relief on silk".

[0003] In order to meet the needs of modern society, the weaving process of Zhang satin is also constantly innovating. The application of modern technology has greatly improved the production efficiency of Zhang satin while maintaining its original artistic characteristics. Mulberry silk is the main weaving material of Zhang satin fabric. As a natural protein fiber, it is loved by consumers because of its excellent softness, gloss and comfort. However, with the increasing demand for functional textiles by consumers, the performance of mulberry silk itself is not enough to meet the current needs of consumers. How to endow it with additional functions (such as anti-radiation, antibacterial, anti-ultraviolet, etc.) while maintaining the original characteristics of mulberry silk has become an important research topic.

[0004] Currently, the most common means of endowing fabric functionality is to use the blending method of multiple fibers and yarns. By mixing different types of yarns together, the functionality can be enhanced to a certain extent. However, the traditional weaving method of blending will change the touch and softness of Zhang satin itself. The satisfaction of functional requirements is based on reducing the appearance requirements of consumers, and it is difficult to meet both requirements at the same time. Therefore, a new solution is needed to solve these problems. Summary of the Invention

[0005] The present invention overcomes the deficiencies of the prior art and provides a Zhang satin fabric and a preparation process thereof.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a preparation process of a Zhang satin fabric, comprising the following steps:

[0007] S1: Freeze the mulberry silk fiber at -40 to -80 °C for 10 - 20 min, and then place the frozen fiber in an environment of 10 - 30 °C to strip the sericin on the surface of the fibroin fiber in the mulberry silk fiber;

[0008] S2: Immerse the fibroin fiber after physically stripping sericin into a solution containing functional dye, control the temperature of the dye solution at 40 - 60 °C, and the impregnation time at 1 - 4 h;

[0009] S3: Dissolve the degummed sericin in an alkaline solution to obtain a sericin solution with a pH value of 8 - 9 and conduct an activation treatment. Meanwhile, add a crosslinking agent to the sericin solution; subsequently, uniformly coat the sericin solution on the surface of the silk fibroin fibers loaded with anti-radiation dyes to form a sericin film;

[0010] S4: Conduct a heat curing treatment on the silk fibroin fibers with a sericin film coated on the surface, so that the sericin gradually crosslinks and adheres to the fiber surface. The heating temperature is controlled at 60 - 80 °C and the time is 10 - 30 min; wash and dry the cured fibers to remove impurities and residues on the surface;

[0011] S5: Spin and weave the washed and dried fibers in sequence to braid into a finished fabric.

[0012] In a preferred embodiment of the present invention, in step S2, the functional dye is an anti-radiation dye, which is one or more of nanoscale titanium dioxide or nanoscale zinc oxide, and the particle size of the dye is 10 - 100 nm.

[0013] In a preferred embodiment of the present invention, in step S2, a dispersant is further added to the dye solution, and ultrasonic treatment is carried out on the solution simultaneously during the impregnation process.

[0014] In a preferred embodiment of the present invention, the dispersant is one or more of polyvinylpyrrolidone or polyethylene glycol.

[0015] In a preferred embodiment of the present invention, the frequency of the ultrasonic treatment is controlled between 20 - 50 kHz.

[0016] In a preferred embodiment of the present invention, the alkaline solution is a sodium hydroxide solution with a concentration of 0.5 - 2%, which is used to dissolve sericin and adjust the pH value to 8 - 9.

[0017] In a preferred embodiment of the present invention, the crosslinking agent is glutaraldehyde, and its mass is 1 - 10% of the mass of sericin.

[0018] In a preferred embodiment of the present invention, in step S3, the specific activation treatment method is: add a reducing agent to the sericin solution. The reducing agent is sodium metabisulfite, and the dosage of the reducing agent accounts for 1 - 5% of the mass of sericin in the sericin solution

[0019] In a preferred embodiment of the present invention, in step S3, the specific coating method is: load the sericin solution into a spraying device, and use the spraying method to spray the sericin solution on the surface of the silk fibroin, finally forming a sericin film; the spraying speed is 50 - 1000 ml / min.

[0020] To achieve the above object, the present invention also provides a Zhang satin fabric, which is woven from fibers prepared by the above-mentioned preparation process.

[0021] The present invention solves the defects existing in the background art and has the following beneficial effects:

[0022] (1) Based on the composition structure of protein fibers, the present invention first separates sericin from fibroin, then combines fibroin with functional materials, and finally reactivates and solidifies sericin on the surface of fibroin loaded with functional materials to endow protein fibers with other functions. Compared with the prior art, the imparting of functionality will not affect the softness, hygroscopicity and touch of the fiber itself, thus meeting the functional requirements of consumers for fabrics without sacrificing the requirements for the appearance and touch of the fabric. Both are achieved, ensuring that the fabric prepared from this functional fiber has good functionality and the soft hygroscopicity of natural fibers.

[0023] (2) By controlling the freezing temperature of appropriate mulberry silk fibers, while ensuring the separation of sericin and fibroin as much as possible, it will not cause an excessive increase in production costs, combining production quality and economic benefits. At the same time, this physical method of separating fibroin and sericin using the principle of thermal expansion and contraction does not involve chemical reagents such as strong acids and strong alkalis compared with the prior art, avoiding harm to the environment and damage to the fibers, reducing wastewater discharge and environmental pollution.

[0024] (3) The present invention also activates the separated sericin. By selecting an appropriate reducing agent and controlling the intake amount of the appropriate reducing agent, it ensures high activation performance of sericin, improves the binding performance between sericin and fibroin, and can also ensure the toughness of the sericin structure to a certain extent to ensure the protection of fibroin.

[0025] (4) By the spraying method, the separated sericin is recombined with fibroin loaded with functional materials, which can ensure the uniformity of the formation of the sericin film, avoid uneven thickness affecting the protective performance and softness of sericin, and affect the touch and softness of the fabric woven from the fibers of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0027] Figure 1 is the process flow chart of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0030] Unless otherwise specified in this application, all raw materials are obtained from commercial purchases or prepared by conventional methods in the art. For details, please refer to the following table:

[0031]

[0032]

[0033] Exemplary Process

[0034] As Figure 1 shown, a preparation process for Zhang satin fabric includes the following steps:

[0035] S1: Freeze the mulberry silk fibers at -40 to -80 °C for 10 - 20 min, and then place the frozen fibers in an environment of 10 - 30 °C to strip the sericin on the surface of the fibroin fibers in the mulberry silk fibers.

[0036] S2: Immerse the fibroin fibers after physical stripping of sericin into a solution containing functional dyes, control the temperature of the dye solution at 40 - 60 °C, and the impregnation time at 1 - 4 h.

[0037] S3: Dissolve the stripped sericin in an alkaline solution to obtain a sericin solution with a pH value of 8 - 9 and perform activation treatment, and at the same time add a cross-linking agent to the sericin solution; then evenly coat the sericin solution on the surface of the fibroin fibers loaded with anti-radiation dyes to form a sericin film.

[0038] S4: Perform heat curing treatment on the fibroin fibers with a sericin film coated on the surface to gradually cross-link the sericin and attach it to the fiber surface. Control the heating temperature at 60 - 80 °C and the time at 10 - 30 min; wash and dry the cured fibers to remove impurities and residues on the surface.

[0039] S5: Spin and weave the washed and dried fibers in sequence to weave into a finished fabric.

[0040] In mulberry silk fibers, fibroin and sericin are two different proteins with different coefficients of thermal expansion. By freezing the mulberry silk fibers at extremely low temperatures, the thermal motion of fibroin and sericin molecules can be significantly reduced, causing their volumes to contract. Subsequently, the fibers are rapidly placed in a normal temperature environment. Fibroin and sericin will re-expand due to the increase in temperature, but due to their different coefficients of thermal expansion, their expansion rates are also different, resulting in stress differences. The present invention utilizes the principle of thermal expansion and contraction, uses the change in temperature to peel off sericin from the surface of fibroin, forming physical peeling. Subsequently, the fibroin is immersed in a solution containing a functional dye to bind the functional dye to the fibroin, endowing the fibroin with corresponding functionality. Subsequently, the sericin is re-solidified on the fibroin loaded with the functional dye, and a fiber with increased functionality can be obtained without destroying the original softness, hygroscopicity, and air permeability of the fiber. The obtained fiber is twisted into yarn and the yarn is woven into cloth. The obtained fabric contains the corresponding functions of the functional dye without destroying the moisture absorption, air permeability, sweat discharge, softness, and comfort properties imparted by sericin to the fabric.

[0041] Specifically, in step S2, the functional dye is an anti-radiation dye, which is one or more of nanoscale titanium dioxide or nanoscale zinc oxide, and the particle size of the dye is 10 - 100 nanometers, so that the fibroin fiber can be uniformly combined with the nanoscale anti-radiation dye, giving the fibroin excellent anti-radiation performance. At the same time, a dispersant is added to the dye solution, and the solution is ultrasonically treated during the impregnation process to improve the dispersibility and adsorption effect of the dye; more specifically, the dispersant is one or more of polyvinylpyrrolidone or polyethylene glycol, and the frequency of the ultrasonic treatment is controlled between 20 - 50 kHz; the ultrasonic treatment and the addition of the dispersant in the dye solution are both used to ensure the uniform dispersion of the anti-radiation dye in the solution, ensure its uniform attachment to the surface of the fibroin fiber, and avoid the problem of local functional deficiency or poor performance caused by the local unbinding of the anti-radiation dye in the fibroin fiber.

[0042] Specifically, in step S3, the specific activation treatment method is: adding a reducing agent to the sericin solution, the reducing agent is sodium dithionite, and the dosage of the reducing agent accounts for 1 - 5% of the mass of sericin in the sericin solution. The addition of the reducing agent breaks the disulfide bonds in the sericin molecules and reduces them to mercapto groups, thereby breaking the cross-linking between the sericin molecules and changing their structure and properties. This process significantly improves the solubility of sericin, reduces the viscosity, enhances the adhesion of the functional material, and improves the uniformity and flexibility of the coating.

[0043] Specifically, in step S3, the specific coating method is as follows: load the sericin solution into a spraying device, and use the spraying method to spray the sericin solution on the surface of silk fibroin to finally form a sericin film; the spraying speed is 50 - 1000 ml / min to ensure that the thickness of the formed sericin film is between 2 - 5 microns; too fast spraying speed may lead to uneven distribution of sericin, while too slow spraying speed may cause excessive deposition of sericin. A spraying flow rate of 50 - 1000 ml / min can balance production efficiency and production quality.

[0044] Specifically, in step S3, the alkaline solution is sodium hydroxide solution with a concentration of 0.5 - 2%, which is used to dissolve sericin and adjust the pH value to 8 - 9. The cross-linking agent is glutaraldehyde, which is used to promote the cross-linking reaction of sericin molecular chains; sericin is an acidic protein and has higher solubility in a weakly alkaline environment. The alkaline environment formed with sodium hydroxide solution as the carrier is beneficial to the dissolution of sericin. Glutaraldehyde can react with the amino groups in sericin molecules to form imine bonds, which are further reduced to stable amine bonds. This process enables strong covalent cross-linking between sericin molecules, which is beneficial to enhancing the cross-linking density and stability of sericin, ensuring that a sericin film with uniform thickness and sufficient strength can be formed on the surface of silk fibroin by the subsequent spraying method.

[0045] Specifically, in step S4, the specific cleaning and drying steps are as follows: rinse the surface of the fiber with warm water at 40 - 60 °C, and after cleaning, use a dryer to dry the fiber. After cleaning and drying, it also includes the step of ironing the fiber with an ironing machine to ensure that the surface of the fiber is flat and smooth, which is convenient for subsequent fiber processing techniques; the drying temperature is controlled at 50 - 60 °C. Protein fibers are prone to denaturation at high temperatures. Controlling the water washing temperature and drying temperature below 60 °C can effectively reduce the possibility of protein fiber denaturation, thus ensuring the production quality.

[0046] Example 1

[0047] S1. Place the mulberry silk fiber in a freeze dryer, first cool it to -40 °C, keep it for 10 min, then adjust the temperature to -80 °C for freezing treatment, and continue to keep it for 10 min. Use gradient cooling to better protect the flexibility of the fiber. Subsequently, quickly place the frozen fiber in a warm water bath at 30 °C and knead or brush it to physically peel off the sericin on the surface of the silk fibroin in the mulberry silk fiber.

[0048] S2: Dissolve nanoscale titanium dioxide with a particle size of 50 nanometers in water and add polyvinylpyrrolidone dispersant to make a dye solution. At the same time, use an ultrasonic generator to generate ultrasonic waves with a frequency of 40 kHz to assist in dye dispersion, control the temperature of the dye solution at 60 °C, and the impregnation time at 2 hours.

[0049] S3: Dissolve the degummed sericin in a 2% sodium hydroxide alkaline solution and add sodium dithionite reductant with a mass of 5% of the sericin mass to activate the sericin. Control the pH value to 8 to obtain a sericin solution, and add 0.5% glutaraldehyde crosslinking agent based on the mass of the sericin in the sericin solution to enhance the crosslinking of the sericin. Control the concentration of the sericin solution to 5%. Spray the prepared sericin solution evenly on the surface of the silk fibroin fiber loaded with the anti-radiation dye through a high-pressure spraying system to form a sericin film. Control the spraying time to 30 minutes and the spraying flow rate to 50 ml / min, and control the average thickness of the sericin film formed by spraying to 5 microns.

[0050] S4: Put the silk fibroin fiber coated with the sericin film into an oven for heat curing treatment, so that the sericin gradually crosslinks and firmly adheres to the fiber surface. Control the heating temperature to 60 °C and the curing time to 20 min; Wash the cured fiber with warm water at 60 °C and send it into a drying oven at 60 °C to dry, removing the surface impurities and residues to obtain the fiber loaded with functionality.

[0051] S5: Twist 8 fibers loaded with functional dyes into yarn through a twisting machine and weave them into cloth in a plain weave pattern.

[0052] Example Two

[0053] Different from Example One, in step S1 of this example, first cool down to -30 °C, keep it for 10 min, and then adjust the temperature to -60 °C for freezing treatment, and continue to keep it for 10 min.

[0054] Example Three

[0055] Different from Example One, in step S1 of this example, first cool down to -20 °C, keep it for 10 min, and then adjust the temperature to -40 °C for freezing treatment, and continue to keep it for 10 min.

[0056] Example Four

[0057] Different from Example One, in step S1 of this example, first cool down to -0 °C, keep it for 10 min, and then adjust the temperature to -10 °C for freezing treatment, and continue to keep it for 10 min.

[0058] Example Five

[0059] Different from Example One, in step S1 of this example, first cool down to -50 °C, keep it for 10 min, and then adjust the temperature to -100 °C for freezing treatment, and continue to keep it for 10 min.

[0060] Example Six

[0061] Different from Example 1, in step S1 of this example, the temperature is first decreased to -55°C and maintained for 10 minutes, and then the temperature is adjusted to -110°C for freezing treatment and maintained for another 10 minutes.

[0062] Example 7

[0063] Different from Example 1, in step S3 of this example, sodium metabisulfite reducing agent is not added and the activation treatment of sericin is abandoned.

[0064] Example 8

[0065] Different from Example 1, in step S3 of this example, a sodium metabisulfite reducing agent with a mass of 1% of the mass of sericin is added to perform activation treatment on sericin.

[0066] Example 9

[0067] Different from Example 1, in step S3 of this example, a sodium metabisulfite reducing agent with a mass of 10% of the mass of sericin is added to perform activation treatment on sericin.

[0068] Comparative Example 1

[0069] Steps S1 - S4 in Example 1 are skipped, and 8 mulberry silk fibers without loaded functional fibers are directly selected and twisted into yarn, and woven into cloth using the same plain weave method.

[0070] Experiment 1:

[0071] A comparative test of anti-radiation performance is carried out between Example 1 and Comparative Example 1. An infrared reflectance test experiment is adopted, and a Fourier transform infrared spectrometer (FTIR) is used to measure the infrared reflectance of the fabric in the 8 - 14 micron wavelength band. The experimental steps are as follows: The fabrics of the experimental group and the control group are respectively placed on the test instrument, the reflectance curves at different wavelengths are recorded, the average reflectance is calculated, and the differences between the two are compared.

[0072] Table 1 Data Sheet of Experiment 1

[0073]

[0074]

[0075] However, according to the above table, the fabric woven from the fibers obtained by this process has a 50-60% improvement in heat radiation resistance compared to the fabric woven from conventional mulberry silk fibers in the comparative example. The reason is that the nano-titanium dioxide anti-radiation material loaded in the fibroin fiber improves the reflectivity of infrared rays, thereby greatly enhancing the anti-radiation performance of the fiber. Subsequently, further coating, dyeing, etc. are carried out on the fabric, which can further improve the heat radiation resistance and other properties of the fabric, resulting in a Zhang satin fabric that does not affect the softness and touch of the fabric, and at the same time meets the needs of consumers in terms of appearance, touch, and functionality.

[0076] Experiment 2:

[0077] Perform sericin stripping experiments on Examples 1 to 6. The experimental method is as follows: Put the stripped fibroin fibers into water, observe their dissolution in water, measure the weight change of the fibers in water by weighing method, and calculate their water solubility loss rate. If the water solubility loss rate is low, it indicates that the sericin stripping is relatively thorough.

[0078] Experimental design: Take 100 g of fibroin fibers for sericin stripping from each of Examples 1 to 6 and put them into distilled water, soak for 2 h and stir with an electromagnetic stirring device, then filter out the fibroin and dry it, and weigh it.

[0079] According to the water solubility loss rate formula:

[0080] Water solubility loss rate = (initial weight - weight after drying) / initial weight * 100%

[0081] Calculate the water solubility loss rates of different examples, compare the water solubility loss rates of samples under different stripping conditions, and evaluate the stripping effect.

[0082] Table 2 Experimental data table of Experiment 2

[0083]

[0084]

[0085] As can be seen from the above table, the water solubility loss rates of Examples 1, 2, 3, 5, and 6 are all lower than 2%. Especially when the temperature is between -80°C and -120°C, the sericin stripping effect is almost at the threshold. Continuing to lower the temperature cannot significantly improve the sericin separation effect, but only increases the energy consumption and causes an increase in production costs. Therefore, freezing treatment at -80°C is the best choice based on economic and production effects.

[0086] The reasons for the above situation are as follows: The water in sericin quickly freezes at a relatively low temperature, forming a large number of small ice crystals. The growth of these ice crystals will damage the microstructure of sericin, making it extremely fragile and prone to cracking and peeling. In addition, the volume expansion effect at extremely low temperatures will generate significant stress between sericin and fibroin, further weakening the bonding force between the two. Therefore, at extremely low temperatures, sericin can be more thoroughly peeled off from fibroin fibers, resulting in a lower water solubility loss rate. The reason for the higher water solubility loss rate in Example 4 is that the relatively high temperature fails to completely freeze the water between fibroin and sericin, forming fewer and larger-sized ice crystals. In this case, the damage degree of the microstructure of sericin is limited, and it is unable to effectively weaken the bonding force between it and fibroin. Therefore, sericin still has strong adhesiveness and is difficult to be completely peeled off, leading to a higher water solubility loss rate.

[0087] Experiment 3:

[0088] Compare with Control Example 1, Example 7, Example 8, and Example 9 to conduct an experiment on the influence degree of the reducing agent concentration on the bonding performance between sericin and fibroin during the activation treatment. The experimental method is as follows: Place the sericin solutions with different reducing agent concentrations prepared in Example 1, Example 7, Example 8, and Example 9 in a high-pressure spray device, and spray the 100g fibroin fibers in all directions at a spray flow rate of 50ml / min for 30min under the same pressure. After the temperature increase and curing in step S4, weigh the mass of each group of fibroin fibers, and weigh the total mass after the combination of fibroin and sericin. Judge the influence of the reducing agent concentration on the bonding performance between sericin and fibroin through the amount of the total mass.

[0089] Table 3 Experimental data table of Experiment 3

[0090] sample Total mass of silk fibroin and sericin / g Example 1 139.44 Example 7 128.56 Example 8 134.51 Example 9 137.88

[0091] According to the analysis of the above table, the reducing agent with a mass of 5% of the sericin mass has the best bonding performance between sericin and fibroin. When no activation treatment of sericin is carried out and no reducing agent is added, the bonding performance between sericin and fibroin is significantly reduced. However, for the reducing agent with a mass of 10% of the sericin mass selected in Example 9, it does not linearly increase the bonding performance between sericin and fibroin, but instead causes a certain degree of reduction in the bonding performance.

[0092] The reasons for the above results are as follows: at an appropriate concentration, specifically at a reducing agent concentration of 5%, the reducing agent can effectively break some of the disulfide bonds in sericin, resulting in a reduction in the intra- and intermolecular crosslinking of sericin. This causes the three-dimensional structure of sericin to become more loose, increasing its flexibility and fluidity, which is beneficial for the combination of sericin and fibroin. At the same time, a moderate reducing agent concentration can promote the swelling of sericin, exposing more polar groups and hydrophobic regions, enhancing the interaction between sericin and fibroin, and improving the binding performance. However, when the reducing agent concentration is too high, the structure of fibroin may be overly changed, leading to a decline in its mechanical properties. The structure in fibroin will be damaged, resulting in a reduction in its strength and elasticity. In addition, excessive reduction may expose the hydrophobic regions on the surface of fibroin, weakening its interaction with sericin, thereby reducing the binding performance.

[0093] Based on the inspiration of the ideal embodiments of the present invention, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A preparation process of Zhang satin fabric, characterized in that, It includes the following steps: S1: Freeze the mulberry silk fiber at -40 to -80 °C for 10 - 20 min, and then place the frozen fiber in an environment of 10 - 30 °C to strip the sericin on the surface of the fibroin fiber in the mulberry silk fiber; S2: Immerse the fibroin fiber from which sericin has been physically stripped into a solution containing a functional dye, control the temperature of the dye solution at 40 - 60 °C, and the impregnation time at 1 - 4 h; S3: Dissolve the stripped sericin in an alkaline solution to obtain a sericin solution with a pH value of 8 - 9 and conduct activation treatment, and at the same time add a cross-linking agent to the sericin solution; then evenly coat the sericin solution on the surface of the fibroin fiber loaded with the anti-radiation dye to form a sericin film; S4: Conduct heat curing treatment on the fibroin fiber with a sericin film coated on the surface, so that the sericin gradually cross-links and adheres to the fiber surface, control the heating temperature at 60 - 80 °C, and the time at 10 - 30 min; wash and dry the cured fiber to remove impurities and residues on the surface; S5: Spin and weave the washed and dried fiber in sequence to weave into a finished fabric.

2. The Zhang satin fabric and its preparation process according to claim 1, characterized in that: In step S2, the functional dye is an anti-radiation dye, which is one or more of nano-titanium dioxide or nano-zinc oxide, and the particle size of the dye is 10 - 100 nm.

3. The Zhang satin fabric and its preparation process according to claim 1 are characterized in that: In step S2, a dispersant is further added to the dye solution, and the solution is subjected to ultrasonic treatment during the impregnation process.

4. The Zhang satin fabric and its preparation process according to claim 3, characterized in that: The dispersant is one or more of polyvinylpyrrolidone or polyethylene glycol.

5. The Zhang satin fabric and its preparation process according to claim 3, characterized in that: The frequency of the ultrasonic treatment is controlled between 20 - 50 kHz.

6. The Zhang satin fabric and its preparation process according to claim 1, characterized in that: The alkaline solution is a sodium hydroxide solution with a concentration of 0.5 - 2%, which is used to dissolve sericin and adjust the pH value to 8 - 9.

7. The Zhang satin fabric and its preparation process according to claim 1, characterized in that: The cross-linking agent is glutaraldehyde, and its mass is 1 - 10% of the mass of sericin.

8. The Zhang satin fabric according to claim 1 and its preparation process are characterized in that: In step S3, the specific activation treatment method is: add a reducing agent to the sericin solution, the reducing agent is sodium dithionite, and the dosage of the reducing agent accounts for 1 - 5% of the mass of sericin in the sericin solution.

9. The Zhang satin fabric and its preparation process according to claim 1 are characterized in that: In step S3, the specific coating method is: load the sericin solution into a spraying device, and use the spraying method to spray the sericin solution on the surface of the fibroin to finally form a sericin film; the spraying speed is 50 - 1000 ml / min.

10. A Zhang satin fabric, characterized in that: The fabric is woven from fibers prepared by the preparation process described in any one of claims 1 - 9.

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