Gambiered canton gauze imitation method based on Maillard reaction

Abstract

The invention provides a gambiered canton gauze imitation method based on a Maillard reaction, and belongs to the technical field of textile manufacturing. The method comprises the following steps: S1, preparing a binary glycosyl cross-linking agent mother solution; s2, preparing and applying a working solution; and S3, sequentially carrying out calendering, baking and washing post-treatment on the fabric. According to the present invention, the food additive sucralose polyaldehyde derivative reacts with the amino group, the hydroxyl group and other polar groups in the protein fabric molecule to prepare the yellowish-brown-to-black fabric, the color of the fabric is similar to the color of the gambiered canton gauze, the natural dye dioscorea cirrhosa does not need to be used, and the quality of the prepared gambiered canton gauze is stable and controllable. According to the invention, by adding the aromatic amino acid, the aromatic amino acid and the polyaldehyde derivative of the sucralose serving as a food additive are subjected to a Maillard reaction similar to that in food, so that the produced gambiered canton gauze fabric has a food fragrance and is relatively high in color fastness.

Description

Technical Field

[0001] The invention relates to the technical field of textile manufacturing, in particular to a method for imitating Xiangyunsha based on the Maillard reaction. Background Art

[0002] Ramie silk is a traditional mulberry silk dyed with pure plant dyes unique to Guangdong Province, my country. It features two different colors on each side: a shiny black front and a coffee-colored underside. Unlike the smooth, flowing texture of ordinary silk, ramie silk has a firm, smooth feel, a strong papery texture, and offers a comfortable, airy, and cool feel. Also known as ramie silk, ramie silk is nicknamed "xiangyunsha" (sounding cloud yarn) because of the jingling sound it produces when worn. Later, it was nicknamed "xiangyunsha" (fragrant cloud yarn), a homophonic name. Traditional Xiangyunsha's unique coloring has earned it a consumer appeal. The traditional Xiangyunsha production process uses mulberry silk as raw material. After dyeing it with the sap of the ramie tuber (containing gelatin and tannins), the silk is exposed to sunlight, which deposits a yellow-brown gelatinous substance on the surface. Then, soil containing iron oxide is evenly coated on the silk. After repeated drying and washing, the silk develops a characteristic black and brown color. And affected by the structure and weather changes, the gloss and color of the raw fabric also have different shades of changes, which makes Xiangyunsha have a unique natural beauty. The blackness and gloss of different Xiangyunsha fabrics will vary, and the brown on the back will also have changes in hue and saturation.

[0003] However, the production of Xiangyunsha fabrics is subject to many uncontrollable factors, including the cultivation of plant dyes, the intensity of ultraviolet rays, temperature, the location of river mud, and other external factors. Furthermore, due to the use of plant dyes, Xiangyunsha's color fastness, such as soap fastness, wet rubbing fastness, sunlight fastness, and perspiration fastness, is difficult to meet the fastness standards required by existing synthetic dyes. Furthermore, traditional Xiangyunsha production is complex, requiring significant time and labor.

[0004] Invention patent CN114892398B discloses a method for imitating Xiangyunsha, which is to form a polyphenol film on the silk fabric by rapid oxidative polymerization of polyphenol compounds and essences. The fabric is yellow-brown, and then the modified fabric is subjected to technical operations such as in-situ loading of metal ions and encapsulation coating of silicone materials, giving the silk fabric a variety of properties including fragrance, antibacterial and antifouling, to obtain imitation Xiangyunsha. Although this patent also provides a method for imitating Xiangyunsha, the technical solution provided by this patent introduces a variety of metal ions including heavy metal ions, such as iron ions, gold ions, silver ions, copper ions, manganese ions, zinc ions, lead ions, mercury ions, cadmium ions, etc., and also adds essences. However, with the improvement of consumers' awareness of safety and health, higher requirements are also placed on the safety of ecological textiles. Fabrics containing heavy metal ions obviously cannot meet consumers' needs for safety and health. Therefore, to date, Xiangyunsha still uses yam as raw material, metals in river mud as chelating agents, and long-term sunlight exposure as the source of ultraviolet rays and temperature. However, the above processing method has the disadvantages of consuming a lot of time and manpower, and the process is cumbersome and the quality is uneven, which makes it difficult to meet consumers' requirements for high-end silk textiles. Summary of the Invention

[0005] In view of this, the present invention provides a method for imitating Xiangyunsha based on the Maillard reaction, comprising the following steps:

[0006] S1. Preparation of diglycoside cross-linking agent mother solution:

[0007] Dissolve sucralose in a non-aqueous solvent and stir evenly to obtain a sucralose solution; dissolve an oxidant in distilled water and stir evenly to obtain an oxidant aqueous solution; add the oxidant aqueous solution dropwise to the sucralose solution, and react at a temperature of -5 to 25° C. in the dark for 30 minutes to 24 hours to obtain a prepared solution; freeze the prepared solution at -60° C. to -20° C. for 1 to 12 hours, and filter to obtain a liquid that is a mother solution of a diglycosyl cross-linking agent;

[0008] S2. Preparation and application of working fluid:

[0009] Add a catalyst to the mother liquor of the dibasic sugar-based cross-linking agent, adjust the pH value of the system to between 2 and 5, add an aromatic amino acid and a thickener, and stir evenly to obtain a working solution A;

[0010] Add a catalyst to the mother liquor of the dibasic sugar-based crosslinker, adjust the pH value of the system to between 2 and 5, add an aromatic amino acid, a thickener, and a reactive dye, and stir evenly to obtain a working solution B;

[0011] Apply working liquid B on the front side of the fabric and working liquid A on the back side of the fabric;

[0012] S3, performing calendering, baking and water washing on the fabric in sequence to obtain Xiangyun yarn based on the Maillard reaction.

[0013] Furthermore, the amount of sucralose used in step S1 accounts for 5% to 20% of the initial total mass of the reaction system.

[0014] Furthermore, the non-aqueous solvent in step S1 is a solvent that can form hydrogen bonds with water molecules.

[0015] Furthermore, the oxidant in step S1 is periodate, and the molar ratio of the oxidant to sucralose is 2.0-3.0:1.

[0016] Furthermore, inert gas is introduced during the reaction process in step S1, and 5% to 20% of a non-aqueous solvent is added to the prepared solution before freezing the prepared solution.

[0017] Furthermore, the effective content of the diglycosyl cross-linking agent in the diglycosyl cross-linking agent mother solution in step S1 is 5% to 15%.

[0018] Furthermore, the catalyst in step S2 is selected from at least one of zinc sulfate, magnesium chloride, and zinc chloride, and the amount of the catalyst is 1-10 wt%.

[0019] Furthermore, the process parameters of the calendering treatment in step S3 are: temperature of 150-200° C., and pressure of 80-100° C.

[0020] Furthermore, the process parameters of the baking treatment in step S3 are: baking at 150-200° C. for 60 seconds to 600 seconds.

[0021] Furthermore, the process parameters of the water washing post-treatment in step S3 are: water washing at 40-60° C. for 5-10 minutes, a bath ratio of 3-8:1, a dosage of soap flakes of 0.5-1 g / L, and a dosage of sodium carbonate of 0.5-2 g / L.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention utilizes polyaldehyde derivatives of the food additive sucralose to react with polar groups such as amino groups and hydroxyl groups in protein fabric molecules to prepare yellowish-brown to black fabric, which is similar in color to Xiangyunsha. The present invention does not require the use of the natural dye Dioscorea, and the quality of the prepared Xiangyunsha is stable and controllable.

[0024] The invention adds aromatic amino acids to generate a Maillard reaction similar to that in food with polyaldehyde derivatives of the food additive sucralose, so that the produced Xiangyunsha fabric has a food aroma.

[0025] The Xiangyunsha fabric prepared by the invention has high color fastness. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the carbon NMR spectrum of the sucralose tetraaldehyde cross-linking agent prepared in Example 1 of the present invention.

[0027] Figure 2 This is a picture of Xiangyunsha based on the Maillard reaction prepared in Example 1 of the present invention.

[0028] Figure 3 This is a picture of Xiangyunsha prepared based on the Maillard reaction in Example 2 of the present invention.

[0029] Figure 4 This is a picture of Xiangyunsha prepared based on the Maillard reaction in Example 3 of the present invention.

[0030] Figure 5 This is a picture of Xiangyunsha based on the Maillard reaction prepared in Example 4 of the present invention.

[0031] Figure 6 This is a picture of Xiangyunsha prepared based on the Maillard reaction in Example 5 of the present invention.

[0032] Figure 7 This is a picture of Xiangyunsha of comparative example 1 of the present invention.

[0033] Figure 8 This is a picture of Xiangyunsha prepared in Comparative Example 2 of the present invention.

[0034] Figure 9 This is the carbon nuclear magnetic resonance spectrum of the sucrose aldehyde cross-linking agent prepared in Comparative Example 2 of the present invention.

[0035] Figure 10 This is a picture of Xiangyunsha prepared in Comparative Example 3 of the present invention.

[0036] Figure 11 This is a picture of Xiangyunsha prepared in Comparative Example 4 of the present invention.

[0037] Figure 12 This is a picture of Xiangyunsha prepared in Comparative Example 5 of the present invention. DETAILED DESCRIPTION

[0038] The present invention provides a method for imitating Xiangyunsha based on the Maillard reaction, comprising the following steps:

[0039] S1. Preparation of diglycoside cross-linking agent mother solution:

[0040] Dissolve sucralose in a non-aqueous solvent and stir evenly to obtain a sucralose solution; dissolve an oxidant in distilled water and stir evenly to obtain an oxidant aqueous solution; add the oxidant aqueous solution dropwise to the sucralose solution, and react at a temperature of -5 to 25° C. in the dark for 30 minutes to 24 hours to obtain a prepared solution; freeze the prepared solution at -60° C. to -20° C. for 1 to 12 hours, and filter to obtain a liquid that is a mother solution of a diglycosyl cross-linking agent;

[0041] S2. Preparation and application of working fluid:

[0042] Add a catalyst to the mother liquor of the dibasic sugar-based cross-linking agent, adjust the pH value of the system to between 2 and 5, add an aromatic amino acid and a thickener, and stir evenly to obtain a working solution A;

[0043] Add a catalyst to the mother liquor of the dibasic sugar-based crosslinker, adjust the pH value of the system to between 2 and 5, add an aromatic amino acid, a thickener, and a reactive dye, and stir evenly to obtain a working solution B;

[0044] Apply working liquid B on the front side of the fabric and working liquid A on the back side of the fabric;

[0045] S3, performing calendering, baking and water washing on the fabric in sequence to obtain Xiangyun yarn based on the Maillard reaction.

[0046] In some embodiments of the present invention, the amount of sucralose used in step S1 accounts for 5% to 20% of the initial total mass of the reaction system.

[0047] In some embodiments of the present invention, the non-aqueous solvent in step S1 is a solvent that can form hydrogen bonds with water molecules. Preferably, the non-aqueous solvent is selected from at least one of methanol, ethanol, propanol, n-propanol, and isopropanol.

[0048] The present invention adds an alcohol non-aqueous solvent to form hydrogen bonds with the hydroxyl groups in the molecular structure of sucralose, thereby slowing down the rapid temperature rise of the reaction system after the addition of the oxidant solution, which triggers a series of adverse reactions such as runaway reaction, decomposition or structural destruction of the target product, and increase of by-products. At the same time, the sucralose molecules are protected from thermal decomposition or oxidation.

[0049] In some embodiments of the present invention, the oxidant in step S1 is periodate, and the molar ratio of the oxidant to sucralose is 2.5-3.5:1.

[0050] In some embodiments of the present invention, an inert gas is introduced during the reaction process of step S1. Preferably, the inert gas is selected from at least one of nitrogen and helium.

[0051] In some embodiments of the present invention, 5% to 20% of a non-aqueous solvent is added to the preparation solution before freezing the preparation solution. The purpose of freezing the preparation solution is to remove and recover the oxidant.

[0052] In one embodiment of the present invention, the temperature of the filtration in step (4) is controlled within the range of -60°C to -20°C. Preferably, the temperature of the filtration in step (4) is controlled within the range of -40°C to -20°C. More preferably, the temperature of the filtration in step (4) is controlled within the range of -30°C.

[0053] In some embodiments of the present invention, the effective content of the diglycosyl cross-linking agent in the diglycosyl cross-linking agent mother solution in step S1 is 5% to 15%.

[0054] In some embodiments of the present invention, the main structural formula of the diglycosyl cross-linking agent in step S1 is shown below: .

[0055] In some embodiments of the present invention, the protein content in the fabric in step S2 is 80% to 100%. Preferably, the fabric is a protein fiber fabric. More preferably, the protein fiber fabric includes but is not limited to any one of silk and wool.

[0056] In some embodiments of the present invention, the catalyst in step S2 is selected from at least one of zinc sulfate, magnesium chloride, and zinc chloride, and the amount of the catalyst is 1-10 wt %. Preferably, the amount of the catalyst is 1-6 wt %, and more preferably, the amount of the catalyst is 3 wt %.

[0057] In some embodiments of the present invention, the aromatic amino acid in step S2 includes any one of phenylalanine, tyrosine, and tryptophan. Preferably, the aromatic amino acid in step S2 is phenylalanine.

[0058] In some embodiments of the present invention, the amount of the aromatic amino acid added in step S2 is 0.5% to 5%. Preferably, the amount of the aromatic amino acid added in step S2 is 0.9%.

[0059] In some embodiments of the present invention, the thickener in step S2 includes thickener DM-5288A, and the amount of the thickener added in step S2 is 0.5-10 g / L. Preferably, the amount of the thickener added in step S2 is 3 g / L.

[0060] In some embodiments of the present invention, the stirring speed in step S2 is 8000-12000 rpm, and the time is 2-5 min. Preferably, the stirring speed in step S2 is 10000 rpm, and the time is 3 min.

[0061] In some embodiments of the present invention, the structure of the reactive dye in step S2 is vinyl sulfone or acrylamide. Preferably, the reactive dye in step S2 includes vinyl sulfone type reactive dye blue 19 or vinyl sulfone type reactive dye red 23.

[0062] In some embodiments of the present invention, the amount of the reactive dye added in step S2 is 0% to 0.2%.

[0063] In some embodiments of the present invention, the step of applying the working liquid B on the front of the fabric in step S2 includes: placing a screen printing plate on the front of the fabric, pouring the working liquid B on the screen printing plate, performing a scraping operation, and drying after the scraping is completed. The weight gain rate of the fabric is 10% to 25%, the mesh number of the screen printing plate is 100 to 150 meshes, the drying temperature is 60 to 90°C, and the time is 20 to 60 seconds. Preferably, the mesh number of the screen printing plate is 120 meshes, the drying temperature is 80°C, and the time is 40 seconds.

[0064] In some embodiments of the present invention, the step of applying working liquid A on the back of the fabric in step S2 includes: placing a screen printing plate on the back of the fabric, pouring the working liquid A on the screen printing plate, performing a scraping operation, and drying after the scraping is completed. The weight gain rate of the fabric is 0.5% to 8%, the mesh number of the screen printing plate is 200~350 mesh, the drying temperature is 60~90℃, and the time is 20~60 seconds. Preferably, the mesh number of the screen printing plate is 250 mesh, the drying temperature is 80℃, and the time is 30 seconds.

[0065] In some embodiments of the present invention, the process parameters of the calendering treatment in step S3 are: temperature of 150-200°C, pressure of 80-100T. Preferably, the process parameters of the calendering treatment in step S3 are: temperature of 160°C, pressure of 80T.

[0066] In some embodiments of the present invention, the process parameters of the baking treatment in step S3 are: baking at 150-200°C for 60s-600s. Preferably, the process parameters of the baking treatment in step S3 are: baking at 170°C for 300s.

[0067] In some embodiments of the present invention, the process parameters of the water washing post-treatment in step S3 are: water washing at 40-60°C for 5-10 minutes, a bath ratio of 3-8:1, an amount of soap flakes of 0.5-1 g / L, and an amount of sodium carbonate of 0.5-2 g / L. Preferably, the process parameters of the water washing post-treatment in step S3 are: water washing at 50°C for 5 minutes, a bath ratio of 5:1, an amount of soap flakes of 0.5 g / L, and an amount of sodium carbonate of 0.5 g / L.

[0068] The mechanism of action of the present invention:

[0069] Protein fiber fabrics, such as wool and silk, are typically dyed with weakly acidic dyes. Chemically, most dyes are aromatic derivatives. In terms of dye-fiber interactions, weakly acidic dyes bond to amino groups on protein fibers through relatively strong forces, such as ionic bonds. The main problem with this dyeing method is that the likelihood of the dye dissociating from the fiber increases with increasing dyeing depth. During production, processing, and use, dye dissociated from dark-colored textiles can adsorb onto lighter-colored textiles, resulting in color defects. Dyeing also produces significant amounts of colored wastewater.

[0070] The Maillard reaction is a complex organic chemical reaction involving the polymerization and condensation of amino-containing compounds with carbonyl compounds at room temperature or under heating conditions. At different stages, substances ranging from light yellow to brown and even black are produced. Many natural protein materials already contain aromatic amino acids, such as phenylalanine, tyrosine, and tryptophan, in their structural units, which can serve as part of the chromophore. The present invention modifies natural proteins with a colorless, dibasic sugar-based crosslinker containing aldehyde groups. Because amino groups are much more reactive than hydroxyl groups, aldehyde groups react with amino groups to form imine derivatives, which in turn link the chromophores together, creating a bread-colored (yellowish-brown to black) dyed protein fabric similar in color to Xiangyunsha.

[0071] Because the modified protein fiber fabric is bonded to the protein fiber through multiple chemical bonds, its wet color fastness, including soap wash fastness and wet rubbing fastness, is superior to that of traditional petroleum-based synthetic dyes bonded to protein through ionic bonds. Furthermore, due to a chemical reaction similar to the Maillard reaction, the modified protein fiber fabric also has a distinct toasted aroma.

[0072] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention are described clearly and completely below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0073] Unless otherwise specified, the experimental methods or test methods described in the following examples are all conventional methods; the raw materials and auxiliary agents, unless otherwise specified, are all obtained from conventional commercial channels or prepared by conventional methods.

[0074] Example 1

[0075] A method for imitating Xiangyunsha based on the Maillard reaction, the specific steps are as follows:

[0076] S1. Preparation of diglycoside cross-linking agent mother solution:

[0077] S1.1. Take 50 g of sucralose and add it to 100 ml of methanol solution. Dissolve it by magnetic stirring at 600 rpm for 10 minutes to obtain a sucralose solution.

[0078] S1.2, take 53.4 g of sodium periodate, add it to 400 ml of distilled water, and dissolve it by magnetic stirring at a speed of 800 rpm for 15 minutes to obtain an aqueous solution of sodium periodate, and protect the aqueous solution of sodium periodate from light;

[0079] S1.3. Control the temperature of the sucralose solution in step (1) at 10°C, introduce high-purity nitrogen as a protective gas, and protect the sucralose solution from light. Then, use a constant pressure separatory funnel to dropwise add the light-protected sodium periodate aqueous solution at a rate of 20 ml / min. After the addition is complete, react in the dark for 2 hours to obtain a prepared solution.

[0080] S1.4. After the reaction, the prepared solution was transferred to a -30°C environment and frozen for 5 hours. Excess sodium periodate and generated sodium iodate precipitated as salt. The oxidant was recovered by vacuum filtration at -30°C, with a recovery rate of nearly 100%. The residual oxidant was tested with starch potassium iodide test paper. If the test paper did not turn blue, the recovery rate was close to 100%. The liquid obtained after filtration was the mother liquor of the diglycosyl cross-linking agent.

[0081] S2. Preparation and application of working fluid:

[0082] Preparation of working solution A: 500 ml of the mother solution of the diglycoside crosslinker described in step S1 was measured, with an effective content of the diglycoside crosslinker of 10%, 3% zinc sulfate as a catalyst, 0.9% aromatic amino acid phenylalanine, and 3 g / L commercial thickener DM-5288A, and the mixture was stirred in a homogenizer at 10,000 rpm for 3 min to obtain working solution A;

[0083] Preparation of working solution B: 500 ml of the mother solution of the diglycoside crosslinker described in step S1 was measured, with an effective content of the diglycoside crosslinker of 10%, 3% zinc sulfate as a catalyst, 0.9% aromatic amino acid phenylalanine, 3 g / L commercial thickener DM-5288A, and 0.08% protein-specific reactive dye vinyl sulfone reactive dye blue 19 were added, and the mixture was stirred in a homogenizer at 10,000 rpm for 3 min to obtain working solution B;

[0084] Apply working liquid B on the front of the silk fabric: take a screen printing plate with a mesh number of 120, place it on the front of the silk fabric, take the working liquid B, place it on the screen of the printing plate, and perform a scraping operation. After the operation is completed, remove the silk fabric after applying working liquid B, place it in an oven at 80°C for 40 seconds, and finally the weight gain rate of the silk fabric is 13.5%;

[0085] Apply working liquid A to the back of the silk fabric: take a 250 mesh screen printing plate, place it on the back of the silk fabric, take the working liquid A, place it on the screen of the printing plate, and perform a scraping operation. After the operation is completed, remove the silk fabric after applying working liquid A and place it in an oven for drying at 80°C for 30 seconds. The final weight gain rate of the silk fabric is 3%;

[0086] Cross-linking reaction process conditions: pre-baking at 110°C for 20 seconds, baking at 150°C for 180 seconds;

[0087] S3. The silk fabric treated in step S2 is placed in a calender at a temperature of 160° C. and a pressure of 80T for calendering treatment, and then placed in an oven and baked at 170° C. for 300 seconds. The baked silk fabric is washed with water at 50° C. for 5 minutes with a bath ratio of 5:1, a soap flake dosage of 0.5 g / L, and a sodium carbonate dosage of 0.5 g / L to obtain Xiangyunsha based on the Maillard reaction.

[0088] The photo of Xiangyunsha prepared based on Maillard reaction in Example 1 is shown in Figure 2 The color depth on the front is 12.3 and the color depth on the back is 9.8.

[0089] Performance testing:

[0090] The test showed that the aldehyde content in the mother liquor of the dibasic sugar-based cross-linking agent prepared in step S1 was 10.10 mmol / g, and the yield of the target product was calculated to be 99.2%.

[0091] 50 ml of the mother solution of the dibasic sugar-based cross-linking agent was taken and dried under reduced pressure at -60°C and a pressure of 4 Pa ​​for 6 hours to obtain a water-free and organic solvent-free powder.

[0092] Take the above powder and use the nuclear magnetic resonance carbon spectroscopy (CNMR) technology to track the structure of the oxidant. The results are as follows Figure 1 As shown by Figure 1The provided C-NMR spectrum reveals two aldehyde peaks at 163 ppm and 166 ppm. Previously reported C-NMR spectra of sucrose-based tetraaldehyde crosslinkers exhibit only a single aldehyde peak, while the characterization results of the present invention show two aldehyde peaks in the C-NMR spectrum of the sucralose tetraaldehyde crosslinker. This may be because traditional sucrose-based tetraaldehyde crosslinkers are typically prepared in aqueous solution. The hydrogen ions generated by the oxidation byproduct, formic acid, readily catalyze the reaction between the aldehyde and hydroxyl groups within the sucrose ring molecule to form hemiacetals, slowing the selective oxidation rate of the ortho-hydroxyl groups in the sucrose molecule by the oxidant and reducing the yield of the sucrose-based tetraaldehyde crosslinker. Consequently, only a single aldehyde peak is detected. In contrast, the present invention pre-dissolves sucralose in a non-aqueous monohydric alcohol solvent and dissolves periodate in distilled water. After the two solutions are mixed, the monohydric alcohol forms hydrogen bonds with hydrogen atoms in water molecules, and no byproduct, formic acid, is generated. Therefore, the preparation method provided by the present invention does not catalyze the formation of intramolecular and intermolecular hemiacetals by the sucralose tetraaldehyde cross-linker, and does not reduce the yield of the target product.

[0093] Example 2

[0094] The difference from Example 1 is that the dyes added in step S2 are vinyl sulfone type reactive dye blue 19, used in an amount of 0.08%; and vinyl sulfone type reactive dye red 23, used in an amount of 0.1%.

[0095] The photo of Xiangyunsha prepared based on Maillard reaction in Example 2 is shown in Figure 3 The color depth on the front is 15.1 and the color depth on the back is 9.5.

[0096] Example 3

[0097] The difference from Example 1 is that in step S2, zinc chloride is used instead of zinc sulfate as the catalyst, and the amount of the catalyst is 5%.

[0098] The photo of Xiangyunsha prepared based on Maillard reaction in Example 3 is shown in Figure 4 The color depth on the front is 12.1 and the color depth on the back is 9.7.

[0099] Example 4

[0100] The difference from Example 1 is that in step S2, magnesium chloride is used instead of zinc sulfate as the catalyst, and the amount of the catalyst is 4%.

[0101] The photo of Xiangyunsha prepared based on Maillard reaction in Example 4 is shown in Figure 5 The color depth on the front is 12.3 and the color depth on the back is 9.6.

[0102] Example 5

[0103] The difference from Example 1 is that the amount of sodium periodate used in step S1.2 is 60 g.

[0104] The photo of Xiangyunsha prepared based on Maillard reaction in Example 5 is shown in Figure 6 The color depth on the front is 12.4, and the color depth on the back is 9.9.

[0105] Comparative Example 1

[0106] The Xiangyunsha fabric dyed with yam available on the market is Figure 7 .

[0107] Comparative Example 2

[0108] The difference from Example 2 is that an equal amount of sucrose derivative is used to replace the dibasic saccharide cross-linking agent mother solution in step S2.

[0109] The photo of Xiangyunsha prepared based on Maillard reaction in Comparative Example 2 is shown in Figure 8 .Depend on Figure 8 It can be seen that Comparative Example 2 can only produce light yellow fabric. The reason may be that sucrose derivatives form carboxaldehyde and semi-carboxaldehyde between molecules in water, resulting in a decrease in the number of polar groups such as hydroxyl and amino groups in protein fibers that react with them, making it difficult for them to undergo an effective Maillard reaction.

[0110] The preparation method of the sucrose derivative is as follows:

[0111] Sucrose and sodium periodate were dissolved in distilled water to prepare a reaction solution with a sucrose mass fraction of 5% and a molar ratio of sodium periodate to sucrose of 3:1. The reaction solution was reacted at 20°C for 26 hours, and then barium sulfate was added at a molar ratio of 1:2 to sodium periodate. After stirring for 1 hour, the solution was filtered to obtain a clear solution which was the sucrose aldehyde crosslinker.

[0112] After titration testing, the residual rate of sodium iodate was 13.2%, and the aldehyde content in the sucrose aldehyde crosslinker was 6.7 mmol / g, indicating that part of the sucrose was not oxidized or the oxidized sucrose formed intramolecular hemiacetal, resulting in a low aldehyde content in the crosslinker.

[0113] 10 ml of the sucrose aldehyde cross-linking agent was taken and dried under reduced pressure at -60°C and a pressure of 4 Pa ​​for 3 hours to obtain anhydrous powder.

[0114] Take the above powder and use the nuclear magnetic resonance carbon spectroscopy (CNMR) technology to track the structure of the oxidant. The results are as follows Figure 9 As shown by Figure 9 The provided carbon NMR spectrum shows that there is only one aldehyde peak at 163 ppm. This is because under the catalysis of formic acid, sucrose aldehyde forms an intramolecular hemiacetal in aqueous solution.

[0115] Comparative Example 3

[0116] The difference from Example 1 is that the amount of sodium periodate used is 31.25 g, and the remaining steps are the same as in Example 1. Figure 10 The color depth on the front is 8.3 and the color depth on the back is 6.8.

[0117] Comparative Example 4

[0118] The difference from Example 1 is that the amount of sodium periodate used is 10 grams, and the other steps are the same as Example 1. Figure 11 The color depth on the front is 4.1, and the color depth on the back is 3.2.

[0119] Comparative Example 5

[0120] The difference from Example 1 is that the amount of sodium periodate used is 110 grams, and the remaining steps are the same as Example 1. Figure 12 The color depth on the front is 8.1 and the color depth on the back is 6.2.

[0121] The color fastness of Examples 1-5 and Comparative Examples 1-5 was tested, and the results are shown in Table 1:

[0122] Table 1 Group Soap fastness Wet rubbing fastness Light fastness Example 1 4 4 4 Example 2 4 4 4 Example 3 4 4 4 Example 4 4 4 4 Example 5 4 4 4 Comparative Example 1 2~3 2~3 2 Comparative Example 2 4 4 4 Comparative Example 3 4 4 4 Comparative Example 4 4 4 4 Comparative Example 5 4 4 4

[0123] As shown in Table 1, the color fastness of the imitation fabrics prepared in Examples 1-5 and Comparative Examples 2-5 is superior to that of Comparative Example 1. This is because the sucralose derivatives or sucrose derivatives in Examples 1-5 and Comparative Examples 2-5 undergo a chemical bond reaction with the protein fiber, while Comparative Example 1 is Xiangyunsha dyed with yam, and the plant dye is bound to the fiber through weaker bonds such as dispersion, van der Waals forces, and hydrogen bonds. Therefore, the wet treatment color fastness of Comparative Example 1 is the worst. In terms of light fastness, the plant dye in Comparative Example 1 is a mixture, which is easily affected by ultraviolet light intensity. In contrast, Examples 1-5 and Comparative Examples 2-5 both produce brown to black products through the Maillard reaction, which have better resistance to ultraviolet light.

[0124] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for imitating Xiangyunsha based on the Maillard reaction, characterized in that: The following steps are involved: S1. Preparation of diglycoside cross-linking agent mother solution: Dissolve sucralose in a non-aqueous solvent and stir evenly to obtain a sucralose solution; dissolve an oxidant in distilled water and stir evenly to obtain an oxidant aqueous solution; add the oxidant aqueous solution dropwise to the sucralose solution, and react at a temperature of -5 to 25° C. in the dark for 30 minutes to 24 hours to obtain a prepared solution; freeze the prepared solution at -60° C. to -20° C. for 1 to 12 hours, and filter to obtain a liquid that is a mother solution of a diglycosyl cross-linking agent; S2. Preparation and application of working fluid: Add a catalyst to the mother liquor of the dibasic sugar-based cross-linking agent, adjust the pH value of the system to between 2 and 5, add an aromatic amino acid and a thickener, and stir evenly to obtain a working solution A; Add a catalyst to the mother liquor of the dibasic sugar-based crosslinker, adjust the pH value of the system to between 2 and 5, add an aromatic amino acid, a thickener, and a reactive dye, and stir evenly to obtain a working solution B; Apply working liquid B on the front side of the fabric and working liquid A on the back side of the fabric; S3, performing calendering, baking and water washing on the fabric in sequence to obtain Xiangyun yarn based on the Maillard reaction.

2. The method for imitating Xiangyunsha based on the Maillard reaction according to claim 1, characterized in that: The amount of sucralose used in step S1 accounts for 5% to 20% of the initial total mass of the reaction system.

3. The method for imitating Xiangyunsha based on the Maillard reaction according to claim 1, characterized in that: The non-aqueous solvent in step S1 is a solvent that can form hydrogen bonds with water molecules.

4. The method for imitating Xiangyunsha based on the Maillard reaction according to claim 1, characterized in that: In step S1, the oxidant is periodate, and the molar ratio of the oxidant to sucralose is 2.5-3.5:

1.

5. The method for imitating Xiangyunsha based on the Maillard reaction according to claim 1, characterized in that: In the reaction process of step S1, an inert gas is introduced, and 5% to 20% of a non-aqueous solvent is added to the prepared solution before freezing the prepared solution.

6. The method for imitating Xiangyunsha based on the Maillard reaction according to claim 1, characterized in that: The effective content of the diglycosyl cross-linking agent in the diglycosyl cross-linking agent mother solution in step S1 is 5% to 15%.

7. The method for imitating Xiangyunsha based on the Maillard reaction according to claim 1, characterized in that: The catalyst in step S2 is selected from at least one of zinc sulfate, magnesium chloride, and zinc chloride, and the amount of the catalyst is 1-10 wt%.

8. The method for imitating Xiangyunsha based on the Maillard reaction according to claim 1, characterized in that: The process parameters of the calendering treatment in step S3 are: temperature of 150-200°C and pressure of 80-100°C.

9. The method for imitating Xiangyunsha based on the Maillard reaction according to claim 1, characterized in that: The process parameters of the baking treatment in step S3 are: baking at 150-200° C. for 60 seconds to 600 seconds.

10. The method for imitating Xiangyunsha based on the Maillard reaction according to claim 1, characterized in that: The process parameters of the water washing post-treatment in step S3 are: water washing at 40-60° C. for 5-10 minutes, a bath ratio of 3-8:1, a dosage of soap flakes of 0.5-1 g / L, and a dosage of sodium carbonate of 0.5-2 g / L.

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