Method for preparing anti-ultraviolet silk fabric by utilizing lavender biomass pigment

Abstract

The invention discloses a method for preparing an anti-ultraviolet silk fabric by utilizing lavender biomass pigment, which comprises the following steps: (1) crushing a lavender biomass raw material by using a crusher to obtain lavender powder; (2) extracting lavender biomass pigment with deionized water, and filtering to obtain pigment dye liquor; (3) soaking the silk in the pigment dye liquor by using a mordant through a pre-mordant method, a same-mordant method or a post-mordant method; the mordant is aluminum potassium sulfate, copper sulfate or ferrous sulfate; the dipping conditions are as follows: the material-liquid ratio is 1: 10-1: 80, the dosage of the mordant is 1-6g / L, the temperature is 20-90 DEG C, the time is 30-150min, and the pH value is 2-9; and (4) carrying out water washing and soaping on the dyed silk fabric for 1-5 times, and drying. The lavender biomass pigment is used as an ultraviolet absorbent for finishing the silk fabric, so that the silk fabric has excellent ultraviolet resistance; meanwhile, the lavender biomass pigment is used as the dye, so that the silk fabric has special colors and unique luster.

Description

Technical Field

[0001] The present invention belongs to the field of silk fabrics, and relates to a method for improving the ultraviolet resistance of silk fabrics. Specifically, the present invention relates to a method for preparing an ultraviolet-resistant silk fabric using lavender biomass pigment. Background Art

[0002] As a protein fiber, silk has excellent hygroscopicity, air permeability, comfort and other characteristics, and is used as an elegant and luxurious clothing fabric and decoration. Under light conditions, aromatic amino acids such as tyrosine and tryptophan in the silk macromolecular structure are easily oxidized, causing oxidative cleavage of the polypeptide chain segments, resulting in yellowing of the silk fabric, and a decrease in light resistance and ultraviolet resistance. Therefore, it is necessary to finish the silk fabric with ultraviolet resistance.

[0003] The ultraviolet resistance of fabrics is measured by the ultraviolet protection coefficient UPF and the transmittance of UVA and UVB. In the prior art, inorganic nanomaterials and organic substances are commonly used to achieve the reflection and absorption of light to improve the ultraviolet resistance of textiles. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, an embodiment of the present invention provides a method for preparing an ultraviolet-resistant silk fabric using lavender biomass pigment. The present invention dyes the silk fabric with lavender biomass pigment and finishes it with ultraviolet resistance, endowing the silk fabric with special color and excellent ultraviolet resistance.

[0005] The present invention adopts the following technical solutions:

[0006] The present invention discloses a method for preparing an ultraviolet-resistant silk fabric using lavender biomass pigment, comprising the following steps:

[0007] (1) Crushing lavender biomass raw materials with a crusher to obtain lavender powder;

[0008] (2) Extracting lavender biomass pigment with deionized water and filtering to obtain a pigment dye solution; the ratio of material to liquid is 1:10 - 1:60, the temperature is 40 - 90 °C, the time is 20 - 120 min, the extraction times are 1 - 3 times, and the filtration times are 1 - 3 times;

[0009] (3) Immersing silk in the pigment dye solution by pre-mordanting method, simultaneous mordanting method or post-mordanting method using a mordant; the mordant is potassium alum, copper sulfate or ferrous sulfate; the immersion conditions include: the ratio of material to liquid is 1:10 - 1:80, the dosage of the mordant is 1 - 6 g / L, the temperature is 20 - 90 °C, the time is 30 - 150 min, and the pH value is 2 - 9.

[0010] (4) Washing and soaping the dyed silk fabric for 1 - 5 times, and drying.

[0011] In some embodiments, in step (2), during the extraction process, the solid-liquid ratio is 1:10 to 1:20, the temperature is 40 to 60 °C, the time is 30 to 40 min, the extraction times are 1 to 2 times, and the filtration times are 1 to 2 times.

[0012] In some preferred embodiments, in step (2), during the extraction process, the solid-liquid ratio is 1:15, the temperature is 50 °C, the time is 30 min, the extraction times are 1 time, and the filtration times are 1 time.

[0013] In some preferred embodiments, the mordant is copper sulfate and the dyeing is carried out by the post-mordant method.

[0014] In some preferred embodiments, step (3) is as follows: First, immerse the silk fabric in the pigment dye solution with a solid-liquid ratio of 1:(40 - 70), a temperature of 70 to 80 °C, an immersion time of 60 to 90 min, and a pH value of 3 to 5; then immerse the dyed silk fabric in a 1 - 4 g / L copper sulfate solution with a solid-liquid ratio of 1:(40 - 70), a temperature of 70 to 80 °C, and a time of 60 to 90 min.

[0015] In some more preferred embodiments, step (3) is as follows: First, immerse the silk fabric in the pigment dye solution with a solid-liquid ratio of 1:70, a temperature of 80 °C, an immersion time of 90 min, and a pH value of 3; then immerse the dyed silk fabric in a 4 g / L copper sulfate solution with a solid-liquid ratio of 1:70, a temperature of 80 °C, and a time of 90 min.

[0016] In some embodiments, in step (4), the water washing means washing in tap water for 1 to 10 min.

[0017] In some embodiments, in step (4), the soaping is as follows: Wash in a 1 - 3 g / L soaping solution at 20 to 60 °C for 10 to 40 min; then wash in water at 40 to 60 °C for 1 to 10 min.

[0018] In some embodiments, in step (4), the drying temperature is 60 to 80 °C.

[0019] In some preferred embodiments, in step (4), the soaping times are 2 to 5 times; more preferably 5 times.

[0020] The present invention has the following advantages and beneficial effects:

[0021] The present invention uses lavender biomass pigment as an ultraviolet absorbent to finish silk fabrics, enabling the silk fabrics to have excellent ultraviolet resistance; at the same time, using lavender biomass pigment as a dye, the silk fabrics have special colors and unique lusters. The method of the present invention also broadens the application range of lavender and improves the resource utilization of lavender. Description of the Drawings

[0022] Figure 1 shows the influence of different material-liquid ratios on the extraction content of lavender biomass pigment.

[0023] Figure 2 shows the influence of different temperatures on the extraction content of lavender biomass pigment.

[0024] Figure 3 shows the influence of different times on the extraction content of lavender biomass pigment.

[0025] Figure 4 shows the influence of different material-liquid ratios on the color depth and ultraviolet resistance of silk fabrics.

[0026] Figure 5 shows the influence of the dosage of different CuSO4 on the color depth and ultraviolet resistance of silk fabrics.

[0027] Figure 6 shows the influence of different temperatures on the color depth and ultraviolet resistance of silk fabrics.

[0028] Figure 7 shows the influence of different times on the color depth and ultraviolet resistance of silk fabrics.

[0029] Figure 8 shows the influence of different pH values on the color depth and ultraviolet resistance of silk fabrics.

[0030] Figure 9 is the dyeing sample diagram of silk fabrics prepared in different examples.

[0031] Figure 10 is the infrared spectrogram of the original silk fabric of the comparative example and the dyed fabric prepared in Example 10.

[0032] Figure 11 is the scanning electron micrograph (×800 times) of the original silk fabric of the comparative example (left) and the dyed fabric prepared in Example 10 (right).

[0033] Figure 12 is the antibacterial test of the original silk fabric of the comparative example (left) and the dyed fabric prepared in Example 10 (right). Detailed Embodiments

[0034] Embodiments of the present invention will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] The lavender biomass raw material mentioned in the present invention refers to dehydrated lavender obtained by first drying lavender.

[0036] The soap washing solution used in the embodiments of the present invention is: Silk and Wool Cleaning Liquid (Blue Moon (China) Industrial Co., Ltd.).

[0037] The tests involved in the embodiments of the present invention are as follows:

[0038] (1) Absorbance test

[0039] Use a pipette to transfer the dye solution, dilute the multiple of the dye solution, and measure its absorbance with a UV-8000 ultraviolet spectrophotometer to make the dye solution show the maximum absorption wavelength in the visible light range, and record the absorbance to draw the absorption spectrum curve.

[0040] (2) Color characteristic value test

[0041] Referring to GB / T 3977-2008 "Methods of Expressing Color", use a CS-821N desktop spectrophotometer to measure the K / S value, L*, a*, and b* values of the dyed fabric respectively.

[0042] The larger the K / S value, the darker the color of the fabric.

[0043] (3) Anti-ultraviolet performance test

[0044] Referring to GB / T 18830-2009 "Evaluation of Anti-ultraviolet Performance of Textiles", use a YG(B)912E textile anti-ultraviolet performance tester to measure the UPF, UVA, and UVB values of the dyed fabric respectively.

[0045] The larger the UPF, the better the ultraviolet blocking effect of the dyed silk fabric. UVA is the one with the longest wavelength in ultraviolet rays and can reach the dermis layer of the skin. The smaller the UVA, the less long-wave ultraviolet rays passing through the fabric. UVB is the one with a shorter wavelength in ultraviolet rays. The smaller the UVB, the less short-wave ultraviolet rays passing through the fabric. The anti-ultraviolet performance of the fabric is jointly confirmed by UPF, UVA, and UVB.

[0046] (4) Soaping color fastness test

[0047] Refer to GB / T 3921-2008 "Textiles - Tests for colour fastness - Colour fastness to soaping". Use the SW-12AC colour fastness to washing tester to conduct soaping on the dyed fabric respectively, with the liquor ratio of 1:50, the soaping liquor of 2 g / L, soaping at 40 °C for 30 min, followed by water washing and drying at 40 °C to constant weight.

[0048] (5) Rubbing colour fastness test

[0049] Refer to GB / T 3920-2008 "Textiles - Tests for colour fastness - Colour fastness to rubbing". Use the Y(B)571G colour fastness to rubbing tester to conduct dry and wet rubbing tests on the dyed fabric respectively, and use a colour comparison card to compare colours to obtain the dry and wet rubbing grades.

[0050] (6) Infrared spectrum analysis test

[0051] Using a Fourier transform infrared spectrometer (perkinElmer Frontier), the scanning range is 4000 cm -1 ~500 cm -1 with a resolution of 4 cm -1 and each wavelength is scanned 32 times.

[0052] Exploration experiment group 1: Extraction of lavender biomass pigment by water extraction

[0053] Exploration experiment 1-1:

[0054] Change the liquor ratio, and the liquor ratios are 1:10, 1:15, 1:20, 1:25, 1:30, 1:35, 1:40 respectively. Extract at 70 °C for 60 min to obtain lavender biomass pigment, filter to get a clear solution, and test the absorbance of the solution (the higher the pigment content, the greater the absorbance). The results are shown in Figure 1 and it can be seen through Figure 1 that as the liquor ratio decreases, the absorbance increases and the pigment content in the solution increases. When the liquor ratios are 1:10 and 1:15, the pigment contents are similar. A larger liquor ratio is beneficial for subsequent dyeing of silk fabrics. Select the pigment extraction liquor ratio at 1:15.

[0055] Exploration experiment 1-2:

[0056] Change the temperature during the extraction process. The temperatures are 50 °C, 55 °C, 60 °C, 65 °C, 70 °C, 75 °C, 80 °C, 90 °C respectively, the liquor ratio is 1:15, and the time is 60 min. Extract lavender biomass pigment and filter to get a clear solution. The results are shown in Figure 2 and it can be seen through Figure 2 that the extraction of lavender pigment is suitable to be carried out under lower temperature conditions. At 50 °C, the pigment content is the highest and the absorbance is the largest.

[0057] Exploration experiment 1-3:

[0058] The extraction time was changed, and the extraction times were 30 min, 45 min, 60 min, 75 min, 90 min, and 120 min respectively. The solid-liquid ratio was 1:15, the temperature was 50 °C, and lavender biomass pigment was extracted. A clear solution was obtained by filtration. The results are shown in Figure 3 , and through Figure 3 It can be seen that as the extraction time increases, the absorbance value first decreases and then increases, but the changes are all small. The reason for the analysis is that the content of lavender flower pigment is small, and the extraction can be completed in a short time. From Figure 3 It can be obtained that when the pigment is extracted for 30 min, the content is the highest and the absorbance is the largest. The appropriate extraction time for lavender pigment is 30 min.

[0059] Example 1

[0060] A method for preparing an anti-ultraviolet silk fabric using lavender biomass pigment, comprising the following steps:

[0061] (1) Crush the lavender biomass raw material with a crusher to obtain lavender powder;

[0062] (2) Water extraction process of lavender biomass pigment: the solid-liquid ratio is 1:15, the temperature is 50 °C, the extraction time is 30 min, the pH value is about 7, the extraction times is 1 time, and the filtration times is 1 time to obtain lavender biomass pigment dye liquor;

[0063] (3) Potassium alum pre-mordant dyeing process: First, immerse the silk fabric in a 1.25 g / L potassium alum solution, with a solid-liquid ratio of 1:40 and a temperature of 70 °C for 60 min. Then put the impregnated silk fabric into the lavender biomass pigment dye liquor, where the solid-liquid ratio of the dye liquor is 1:40, the temperature is 70 °C, and the time is 60 min. Use acetic acid-sodium acetate buffer solution and / or sodium hydroxide to adjust the pH value to 4.8.

[0064] (4) Wash the silk fabric in tap water for 5 min, then add it to a soaping solution with a solid-liquid ratio of 1:50, a temperature of 40 °C, and a concentration of 2 g / L, and soap it in a color fastness to washing tester for 30 min. Then wash it with 40 °C clear water for 5 min, then wash it under normal temperature tap water for 5 min, and finally dehydrate and dry it.

[0065] Example 2

[0066] The difference from Example 1 is:

[0067] Step (3) is: Potassium alum co - mordant dyeing process: Add 1.25 g / L of potassium alum to the lavender biomass pigment dye liquor, with a pH value of 4.8, a dye liquor to fabric ratio of 1:40. Put the silk fabric into it at a temperature of 70 °C, and the impregnation time is 60 min.

[0068] Others are the same as in Example 1.

[0069] Example 3

[0070] The difference from Example 1 is:

[0071] Step (3) is: Potassium alum post - mordant dyeing: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the dye liquor to fabric ratio is 1:40, the temperature is 70 °C, the impregnation time is 60 min, and the pH value is 4.8. Then immerse the dyed silk fabric in a 1.25 g / L potassium alum solution, with a liquor to fabric ratio of 1:40, a temperature of 70 °C, and a time of 60 min.

[0072] Others are the same as in Example 1.

[0073] Example 4

[0074] The difference from Example 1 is:

[0075] Step (3) is: Ferrous sulfate pre - mordant dyeing process: First, immerse the silk fabric in a 1.25 g / L ferrous sulfate solution, with a liquor to fabric ratio of 1:40, a temperature of 70 °C, and a time of 60 min. Then put the impregnated silk fabric into the lavender biomass pigment dye liquor, where the dye liquor to fabric ratio is 1:40, the temperature is 70 °C, the impregnation time is 60 min, and the pH value is 4.8.

[0076] Others are the same as in Example 1.

[0077] Example 5

[0078] The difference from Example 1 is:

[0079] Step (3) is: Ferrous sulfate co - mordant dyeing process: Add 1.25 g / L of ferrous sulfate to the lavender biomass pigment dye liquor, with a pH value of 4.8, a dye liquor to fabric ratio of 1:40. Put the silk fabric into it at a temperature of 70 °C, and the impregnation time is 60 min.

[0080] Others are the same as in Example 1.

[0081] Example 6

[0082] The difference from Example 1 is:

[0083] Step (3) is: post-mordant dyeing process with ferrous sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the ratio of dye to liquor is 1:40, the temperature is 70°C, the immersion time is 60 min, and the pH value is 4.8. Then, immerse the dyed silk fabric in a 1.25 g / L ferrous sulfate solution, with a ratio of material to liquor of 1:40, a temperature of 70°C, and a time of 60 min.

[0084] Others are the same as in Example 1.

[0085] Example 7

[0086] The difference from Example 1 is:

[0087] Step (3) is: pre-mordant dyeing process with copper sulfate: First, immerse the silk fabric in a 1.25 g / L copper sulfate solution, with a ratio of material to liquor of 1:40, a temperature of 70°C, and an immersion time of 60 min. Then, put the immersed silk fabric into the lavender biomass pigment dye liquor, where the ratio of dye to liquor is 1:40, the temperature is 70°C, the immersion time is 60 min, and the pH value is 4.8.

[0088] Others are the same as in Example 1.

[0089] Example 8

[0090] The difference from Example 1 is:

[0091] Step (3) is: simultaneous mordant dyeing process with copper sulfate: Add 1.25 g / L copper sulfate to the lavender biomass pigment dye liquor, with a pH value of 4.8, a ratio of dye to liquor of 1:40, put the silk fabric at a temperature of 70°C, and the immersion time is 60 min.

[0092] Others are the same as in Example 1.

[0093] Example 9

[0094] The difference from Example 1 is:

[0095] Step (3) is: post-mordant dyeing process with copper sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the ratio of dye to liquor is 1:40, the temperature is 70°C, the immersion time is 60 min, and the pH value is 4.8. Then, immerse the dyed silk fabric in a 1.25 g / L copper sulfate solution, with a ratio of material to liquor of 1:40, a temperature of 70°C, and a time of 60 min.

[0096] Others are the same as in Example 1.

[0097] Exploration experiment group 2: Influence of post-mordant dyeing process with copper sulfate on the color depth and ultraviolet resistance of silk fabric

[0098] A method for preparing silk fabric with ultraviolet resistance using lavender biomass pigment

[0099] (1) Crush the lavender biomass raw material with a crusher to obtain lavender powder;

[0100] (2) Water extraction process of lavender biomass pigment: the material-liquid ratio is 1:15, the temperature is 50 °C, the extraction time is 30 min, the pH value is 7, the extraction times is 1 time, and the filtration times is 1 time to obtain the lavender biomass pigment dye liquor;

[0101] (3) Change the after-mordant dyeing process conditions of copper sulfate

[0102] (4) Wash the silk fabric in tap water for 5 min, then add it to a soap washing solution with a material-liquid ratio of 1:50, a temperature of 40 °C, and a concentration of 2 g / L, and soap wash it in a color fastness to washing tester for 30 min. After the soap washing is completed, wash it with water at 40 °C for 5 min, then wash it under normal temperature tap water for 5 min, and finally dehydrate and dry it.

[0103] Exploration experiment 2-1: Influence of material-liquid ratio on the color depth and ultraviolet resistance of silk fabric

[0104] After-mordant dyeing process of copper sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the material-liquid ratios of the dye liquor are 1:20, 1:30, 1:40, 1:50, 1:60, 1:70 respectively, the temperature is 70 °C, the immersion time is 60 min, and the pH value is 4. Then immerse the dyed silk fabric in a 2 g / L copper sulfate solution, and the corresponding material-liquid ratios are 1:20, 1:30, 1:40, 1:50, 1:60, 1:70 respectively, the temperature is 70 °C, and the time is 60 min. The results are shown in Figure 4 .

[0105] It can be seen through Figure 4 that the K / S value of the fabric increases with the increase of the material-liquid ratio, and the ultraviolet protection coefficient UPF increases with the increase of the bath ratio, showing an upward trend. The optimal material-liquid ratio is 1:70. At the material-liquid ratio of 1:70, the values of transmittance UVA and UVB are also relatively low.

[0106] Exploration experiment 2-2: Influence of CuSO4 dosage on the color depth and ultraviolet resistance of silk fabric

[0107] After-mordant dyeing process of copper sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the material-liquid ratio of the dye liquor is 1:70, the temperature is 70 °C, the immersion time is 60 min, and the pH value is 4. Then immerse the dyed silk fabric in 1 g / L, 1.5 g / L, 2 g / L, 2.5 g / L, 3 g / L, 3.5 g / L, 4 g / L, 4.5 g / L copper sulfate solutions respectively, the material-liquid ratio is 1:70, the temperature is 70 °C, and the time is 60 min. The results are shown in Figure 5。

[0108] Through Figure 5 It can be seen that as the dosage of CuSO4 increases, the K / S value of the fabric first increases and then decreases. The K / S value is the highest when the dosage of CuSO4 is 4 g / L, the anti-ultraviolet coefficient UPF is the highest at 4 g / L, and the transmittance of UVA and UVB is also relatively low at 4 g / L. In summary, when the dosage of CuSO4 is 4 g / L, the K / S value and ultraviolet performance are the best.

[0109] Exploratory Experiment 2-3: Effect of Temperature on Color Depth and Anti-ultraviolet Performance of Silk Fabrics

[0110] Post-mordant dyeing process with copper sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the liquor ratio of the dye liquor is 1:70, the temperatures are 30 °C, 40 °C, 50 °C, 60 °C, 70 °C, 80 °C, 90 °C respectively, the impregnation time is 90 min, and the pH value is 4. Then immerse the dyed silk fabric in a 4 g / L copper sulfate solution, with a liquor ratio of 1:70, and the corresponding temperatures are 30 °C, 40 °C, 50 °C, 60 °C, 70 °C, 80 °C, 90 °C respectively, and the time is 90 min. The results are shown in Figure 6 。

[0111] Through Figure 6 It can be seen that as the temperature increases, the K / S value of the fabric first increases and then decreases. The K / S value is the highest at 80 °C, the anti-ultraviolet coefficient UPF is the highest at 80 °C, and the transmittance of UVA and UVB is also relatively low at 80 °C. In summary, when the temperature is 80 °C, the K / S value and ultraviolet performance are the best.

[0112] Exploratory Experiment 2-4: Effect of Time on Color Depth and Anti-ultraviolet Performance of Silk Fabrics

[0113] Post-mordant dyeing process with copper sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the liquor ratio of the dye liquor is 1:70, the temperature is 80 °C, the impregnation times are 30 min, 45 min, 60 min, 75 min, 90 min, 120 min respectively, and the pH value is 4. Then immerse the dyed silk fabric in a 4 g / L copper sulfate solution, with a liquor ratio of 1:70, and the temperature is 80 °C, and the corresponding times are 30 min, 45 min, 60 min, 75 min, 90 min, 120 min respectively. The results are shown in Figure 7 。

[0114] Through Figure 7 It can be seen that when the impregnation time is 90 min, the K / S value is the highest, the anti-ultraviolet coefficient UPF is the highest, and the transmittance of UVA and UVB is also the lowest at 90 min of impregnation time.

[0115] Exploration Experiment 2-5: Effects of pH Value on Color Depth and UV Resistance of Silk Fabrics

[0116] Post-mordant dyeing process with copper sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the ratio of dye to liquor is 1:70, the temperature is 80 °C, and the immersion time is 90 min. Adjust the pH value to 3, 4, 5, 6, 7, 8, and 9 respectively using acetic acid-sodium acetate buffer solution and / or sodium hydroxide. Then, immerse the dyed silk fabric in a 4 g / L copper sulfate solution, with a liquor ratio of 1:70, a temperature of 80 °C, and a time of 90 min. The results are shown in Figure 8 .

[0117] It can be seen from Figure 8 that when the pH value is 3, the K / S value is the highest, the UV protection coefficient UPF is the highest, and the transmittances of UVA and UVB are also relatively low at a pH value of 3.

[0118] Example 10

[0119] The difference from Example 9 is: different conditions for the post-mordant dyeing process with copper sulfate

[0120] Step (3) of Example 10 is: Post-mordant dyeing process with copper sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the ratio of dye to liquor is 1:70, the temperature is 80 °C, the immersion time is 90 min, and the pH value is 3. Then, immerse the dyed silk fabric in a 4 g / L copper sulfate solution, with a liquor ratio of 1:70, a temperature of 80 °C, and a time of 90 min.

[0121] The others are the same as in Example 9.

[0122] Example 11

[0123] The difference from Example 10 is: different number of soaping times. In Example 11, soaping is done 2 times.

[0124] Step (4) of Example 11 is: Wash the silk fabric in tap water for 5 min, then add it to a soaping liquor with a liquor ratio of 1:50, a temperature of 40 °C, and a concentration of 2 g / L, and soap it in a color fastness to washing tester for 30 min. Then wash it with 40 °C clear water for 5 min, soap it 2 times, then wash it under normal temperature tap water for 5 min, and finally dehydrate and dry it.

[0125] The others are the same as in Example 10.

[0126] Example 12

[0127] The difference from Example 10 is: different number of soaping times. In Example 12, soaping is done 5 times.

[0128] Step (4) of Example 12 is as follows: Wash the silk fabric in tap water for 5 min, then add it to a soap bath with a liquor ratio of 1:50, a temperature of 40 °C, and a concentration of 2 g / L, and carry out soaping in a color fastness to washing tester for 30 min. Then wash it with water at 40 °C for 5 min, carry out soaping 5 times, then wash it under normal temperature tap water for 5 min, and finally dehydrate and dry it.

[0129] Others are the same as Example 10.

[0130] Example 13

[0131] The difference from Example 10 is that the pH value in the post - mordant dyeing process with copper sulfate in step (3) is different.

[0132] Step (3) in Example 13 is as follows: Post - mordant dyeing process with copper sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the liquor ratio of the dye liquor is 1:70, the temperature is 80 °C, the immersion time is 90 min, and the pH value is 4. Then immerse the dyed silk fabric in a 4 g / L copper sulfate solution, with a liquor ratio of 1:70, a temperature of 80 °C, and a time of 90 min.

[0133] Others are the same as Example 10.

[0134] Example 14

[0135] The difference from Example 13 is that the number of soaping times in Example 14 is 2 times.

[0136] Step (4) of Example 14 is as follows: Wash the silk fabric in tap water for 5 min, then add it to a soap bath with a liquor ratio of 1:50, a temperature of 40 °C, and a concentration of 2 g / L, and carry out soaping in a color fastness to washing tester for 30 min. Then wash it with water at 40 °C for 5 min, carry out soaping 2 times, then wash it under normal temperature tap water for 5 min, and finally dehydrate and dry it.

[0137] Others are the same as Example 13.

[0138] Example 15

[0139] The difference from Example 10 is that the pH value in the post - mordant dyeing process with copper sulfate in step (3) is different.

[0140] Step (3) in Example 13 is as follows: Post - mordant dyeing process with copper sulfate: First, immerse the silk fabric in the lavender biomass pigment dye liquor, where the liquor ratio of the dye liquor is 1:70, the temperature is 80 °C, the immersion time is 90 min, and the pH value is 5. Then immerse the dyed silk fabric in a 4 g / L copper sulfate solution, with a liquor ratio of 1:70, a temperature of 80 °C, and a time of 90 min.

[0141] Others are the same as Example 10.

[0142] Example 16

[0143] The difference from Example 15 is that the number of soaping times in Example 16 is 2 times.

[0144] Step (4) of Example 16 is as follows: Wash the silk fabric in tap water for 5 min, then add it to a soaping bath with a liquor ratio of 1:50, a temperature of 40 °C, and a concentration of 2 g / L, and carry out soaping in a color fastness to washing tester for 30 min. Then wash it with water at 40 °C for 5 min, carry out soaping 2 times, then wash it under normal temperature tap water for 5 min, and finally dehydrate and dry it.

[0145] Others are the same as Example 15.

[0146] Comparative example

[0147] Raw silk fabric.

[0148] Test results:

[0149] Table 1 Test results of anti-ultraviolet performance and color shade of silk fabrics prepared in different examples

[0150]

[0151]

[0152] Table 2 Test results of color fastness of silk fabrics prepared in different examples

[0153]

[0154] From Table 1, Table 2 and Figure 9 it can be seen that

[0155] From the comparison of Examples 1 - 9, it can be seen that Example 1 is pre-metallic mordant dyeing with KAl(SO4)2, Example 2 is simultaneous mordant dyeing with KAl(SO4)2, Example 3 is post-metallic mordant dyeing with KAl(SO4)2, Example 4 is pre-metallic mordant dyeing with FeSO4, Example 5 is simultaneous mordant dyeing with FeSO4, Example 6 is post-metallic mordant dyeing with FeSO4, Example 7 is pre-metallic mordant dyeing with CuSO4, Example 8 is simultaneous mordant dyeing with CuSO4, Example 9 is post-metallic mordant dyeing with CuSO4. The silk fabrics prepared in Examples 1 - 9 all have a certain anti-ultraviolet effect, but the color depth of the silk fabrics prepared in Examples 1 - 3 is low, and there is uneven dyeing in Examples 4 - 6. Considering the anti-ultraviolet performance and the influence of color depth comprehensively, the effects of Examples 7 - 9 are better. Considering the rubbing fastness and soaping fastness comprehensively, the best one is CuSO4 by post-metallic mordant dyeing, with the dry rubbing fastness and wet rubbing fastness both being grade 5, and the soaping fastness being grade 4 - 5.

[0156] It can be seen from the comparison between Example 9 and Example 10 that the specific conditions of the post-mordant dyeing process with copper sulfate have a great influence on the color depth and ultraviolet resistance of silk fabrics. The color depth and ultraviolet resistance of the silk fabric prepared in Example 10 are far better than those in Example 9.

[0157] It can be seen from the comparison between Example 10 (soaping once), Example 11 (soaping twice), and Example 12 (soaping five times) that as the number of soaping increases, the K / S value and UPF also increase, and the ultraviolet resistance of the silk fabric prepared in Example 12 is more excellent.

[0158] It can be seen from the comparison between Example 10 (pH = 3), Example 13 (pH = 4), and Example 15 (pH = 5) that when the pH of the post-mordant dyeing process with copper sulfate is 3, the performance of the prepared silk fabric is more excellent.

[0159] Figure 10 The infrared spectra of the original silk fabric and the silk fabric prepared in Example 10 are shown. By Figure 10 It can be seen that there are slight shifts in the positions of the characteristic peaks between the undyed original fabric and the dyed fabric in Example 10. This may be due to the interaction between the lavender dye molecules and the silk fiber molecules, such as hydrogen bonding or van der Waals forces, which affect the vibration frequency of the functional groups. The intensity of the peaks in the figure may also change. If the lavender dye molecules adsorb on the surface of the silk fabric or undergo chemical changes with the silk molecules, it may lead to changes in the concentration of relevant functional groups, resulting in an increase in the absorption peak intensity.

[0160] Figure 11 This is the SEM analysis of the original silk fabric and the silk fabric prepared in Example 10. By Figure 11 It can be seen that under the scanning electron microscope, there are no short fibers, cracks, etc. in the longitudinal direction of the silk fabric before and after finishing. That is, after finishing, the luster, strength, and structure of the silk fabric have not changed.

[0161] Figure 12 The antibacterial test results of the original silk fabric and the silk fabric prepared in Example 10 are shown. The antibacterial properties of the silk before and after finishing were tested using Escherichia coli. Using the shaking culture method, the fabric specimen and the bacterial solution were added to a triangular flask and allowed to come into full contact under shaking conditions so that the bacteria could fully interact with the fabric surface. After cultivation, the number of viable bacteria in the bacterial solution was measured, and the antibacterial rate of the fabric was calculated. Through calculation, the antibacterial property of the silk fabric after finishing against Escherichia coli reached 94%.

[0162] In the present invention, terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0163] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for preparing anti-ultraviolet silk fabric using lavender biomass pigment, characterized in that, It includes the following steps: (1) Crush the lavender biomass raw material with a crusher to obtain lavender powder; (2) Extract the lavender biomass pigment with deionized water and filter to obtain the pigment dye solution; the ratio of material to liquid is 1:10 - 1:60, the temperature is 40 - 90 °C, the time is 20 - 120 min, the extraction times are 1 - 3 times, and the filtration times are 1 - 3 times; (3) Immerse the silk in the pigment dye solution by the pre-mordant method, simultaneous mordant method or post-mordant method using a mordant; The mordant is potassium alum, copper sulfate or ferrous sulfate; the immersion conditions include: the ratio of material to liquid is 1:10 - 1:80, the dosage of the mordant is 1 - 6 g / L, the temperature is 20 - 90 °C, the time is 30 - 150 min, and the pH value is 2 - 9; (4) Wash and soapy wash the dyed silk fabric 1 - 5 times and dry it.

2. The method for preparing an anti-ultraviolet silk fabric using lavender biomass pigment according to claim 1, characterized in that, In step (2), during the extraction process, the ratio of material to liquid is 1:10 - 1:20, the temperature is 40 - 60 °C, the time is 30 - 40 min, the extraction times are 1 - 2 times, and the filtration times are 1 - 2 times.

3. The method for preparing an anti-ultraviolet silk fabric using lavender biomass pigment according to claim 2, characterized in that, In step (2), during the extraction process, the ratio of material to liquid is 1:15, the temperature is 50 °C, the time is 30 min, the extraction times are 1 time, and the filtration times are 1 time.

4. The method for preparing an anti-ultraviolet silk fabric using lavender biomass pigment according to claim 1, wherein, The mordant is copper sulfate and the dyeing is carried out by the post-mordant method.

5. The method for preparing an anti-ultraviolet silk fabric using lavender biomass pigment according to claim 4, characterized in that, Step (3) is: first immerse the silk fabric in the pigment dye solution, the ratio of material to liquid is 1:(40 - 70), the temperature is 70 - 80 °C, the immersion time is 60 - 90 min, and the pH value is 3 - 5; then immerse the dyed silk fabric in a 1 - 4 g / L copper sulfate solution, the ratio of material to liquid is 1:(40 - 70), the temperature is 70 - 80 °C, and the time is 60 - 90 min.

6. The method for preparing an anti-ultraviolet silk fabric using lavender biomass pigment according to claim 5, characterized in that, Step (3) is: first immerse the silk fabric in the pigment dye solution, the ratio of material to liquid is 1:70, the temperature is 80 °C, the immersion time is 90 min, and the pH value is 3; then immerse the dyed silk fabric in a 4 g / L copper sulfate solution, the ratio of material to liquid is 1:70, the temperature is 80 °C, and the time is 90 min.

7. A method for preparing a silk fabric with ultraviolet resistance using lavender biomass pigment according to any one of claims 4-6, characterized in that, In step (4), the number of soapy wash times is 2 - 5 times; preferably 5 times.

8. The method for preparing an anti-ultraviolet silk fabric using lavender biomass pigment according to claim 7, characterized in that, In step (4), the water wash means washing in tap water for 1 - 10 min.

9. The method for preparing an anti-ultraviolet silk fabric using lavender biomass pigment according to claim 7, characterized in that, In step (4), the soapy wash is: wash in a 1 - 3 g / L soapy wash solution at 20 - 60 °C for 10 - 40 min; then wash in water at 40 - 60 °C for 1 - 10 min.

10. The method for preparing an anti-ultraviolet silk fabric using lavender biomass pigment according to claim 7, characterized in that, In step (4), the drying temperature is 60 - 80 °C.

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