A multifunctional flame-retardant textile based on biomass and a method for preparing the same

Abstract

The present application belongs to the technical field of multifunctional textiles, and provides a biomass-based multifunctional flame-retardant textile and a preparation method thereof.Cotton fabric is dipped in a folic acid aqueous solution and dried, the folic acid-treated cotton fabric is dipped in an egg yolk aqueous solution and dried; the cotton fabric is alternately dipped in the folic acid aqueous solution and the egg yolk aqueous solution to obtain pretreated cotton fabric; the pretreated cotton fabric is dipped in a phytic acid aqueous solution and dried to obtain a biomass-based colored antibacterial and ultraviolet-resistant multifunctional flame-retardant textile.The present application uses a layer-by-layer self-assembly method to construct a folic acid / egg yolk / phytic acid coating on the surface of the cotton fabric, successfully prepares an antibacterial and ultraviolet-resistant multifunctional flame-retardant textile with good coloring effect, improves the added value of the textile, expands the application field of the textile, and has important practical application value and social significance.

Description

Technical Field

[0001] This invention relates to the field of multifunctional textile technology, and in particular to a multifunctional flame-retardant textile based on biomass and its preparation method. Background Technology

[0002] With the improvement of living standards, textiles are widely used in clothing, decoration, and construction. However, textiles are flammable and release smoke and toxic gases during combustion, posing a serious threat to people's lives and property, greatly limiting their application. Therefore, flame-retardant treatment of textiles can slow the spread of fire, reduce the production of toxic gases during combustion, and protect personal and property safety. There are two common methods for preparing flame-retardant textiles: one is to treat the textiles with various flame-retardant finishing agents; the other is to manufacture flame-retardant fibers. However, the production cost of flame-retardant fibers is high and the technology is difficult, so flame-retardant finishing agents are generally used to treat textiles.

[0003] Conventional halogen-based flame retardants have advantages such as low dosage and high flame retardant efficiency, but they produce dense smoke and hydrogen halide gases during combustion, causing fatal injuries to people in fires. Furthermore, these harmful substances can accumulate in the environment and organisms, seriously endangering human health and the ecological environment. With increasing awareness of ecological protection, halogen-free flame retardants have become the mainstream of current research. Biomass materials, rich in elements such as carbon, nitrogen, and phosphorus, can be used as raw materials for flame retardants. At the same time, the development and use of bio-based polymeric flame retardants can effectively alleviate resource scarcity and avoid the environmental pollution problems caused by the application of petroleum-based materials. Moreover, people have increasingly higher requirements for the performance of flame-retardant textiles. Flame-retardant fibers or fabrics that only possess flame-retardant properties cannot meet the special requirements of certain sectors, necessitating the development of multifunctional flame-retardant textiles.

[0004] Therefore, developing a multifunctional flame-retardant textile based on biomass with coloring, antibacterial, and UV-resistant properties has significant practical application value and social significance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art by providing a multifunctional flame-retardant textile based on biomass and its preparation method.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] This invention provides a method for preparing a multifunctional flame-retardant textile based on biomass, comprising the following steps:

[0008] 1) The cotton fabric was soaked in folic acid aqueous solution and then dried. The folic acid-treated cotton fabric was soaked in egg yolk aqueous solution and then dried. The cotton fabric was soaked alternately in folic acid aqueous solution and egg yolk aqueous solution to obtain pretreated cotton fabric.

[0009] 2) The pretreated cotton fabric was soaked in phytic acid aqueous solution and then dried to obtain a biomass-based multifunctional flame-retardant textile.

[0010] Preferably, the folic acid aqueous solution in step 1) has a mass concentration of 0.1-1.5% and a pH value of 3-5.

[0011] Preferably, the mass concentration of the egg yolk aqueous solution in step 1) is 25-75%.

[0012] Preferably, in step 1), the soaking time in the folic acid aqueous solution and the soaking time in the egg yolk aqueous solution are independently 8 to 12 minutes, and the drying temperature is independently 55 to 65°C.

[0013] Preferably, when the cotton fabric is alternately soaked in folic acid aqueous solution and egg yolk aqueous solution once, the number of layers deposited is 1.

[0014] Preferably, the number of layers deposited on the pretreated cotton fabric is 1 to 3.

[0015] Preferably, the phytic acid aqueous solution in step 2) has a mass concentration of 5-20%.

[0016] Preferably, the soaking time in step 2) is 8 to 12 minutes, and the drying temperature is 55 to 65°C.

[0017] The present invention also provides the preparation method described above to prepare a multifunctional flame-retardant textile based on biomass.

[0018] The beneficial effects of this invention include:

[0019] 1) This invention uses a layer-by-layer self-assembly method to construct a folic acid / egg yolk / phytic acid coating on the surface of cotton fabric, successfully preparing a biomass-based antibacterial and UV-resistant multifunctional flame-retardant textile with good coloring effect, which increases the added value of textiles, expands the application fields of textiles, and has important practical application value and social significance.

[0020] 2) This invention utilizes biomass materials such as folic acid, egg yolk, and phytic acid. Folic acid is one of the vitamin B complex components and is widely distributed in green vegetables. The amino groups in folic acid are positively charged under acidic conditions, exhibiting certain antibacterial properties. Simultaneously, it can absorb ultraviolet light in the 280–370 nm range, providing UV protection. Phytic acid is widely available, easy to extract, contains a large amount of phosphorus, and possesses excellent flame-retardant properties. Egg yolk and folic acid can give textiles a uniform yellow color, providing excellent coloring effects. By assembling folic acid, egg yolk, and phytic acid onto the surface of textiles, a biomass-based, antibacterial, and UV-resistant multifunctional flame-retardant textile with excellent coloring effects is prepared.

[0021] 3) This invention uses biomass materials for flame-retardant finishing of textiles, which has higher ecological performance and lower environmental pollution risk than traditional flame-retardant technologies. It better protects human life, property, and the ecological environment, and is conducive to the construction of a green and environmentally friendly social development model. Most traditional flame retardants are synthesized from petroleum-based compounds. The biopolymer flame retardant used in this invention has advantages such as wide availability, biodegradability, and renewability. Its development and use can effectively alleviate resource scarcity and avoid the environmental pollution problems caused by the application of petroleum-based materials. Attached Figure Description

[0022] Figure 1 The results of Staphylococcus aureus inhibition test on the multifunctional flame-retardant textile, blank group and untreated cotton fabric of Example 1 are shown.

[0023] Figure 2 The coloring effect of the multifunctional flame-retardant textile in Example 1 and the color comparison of the untreated cotton fabric are shown.

[0024] Figure 3 The results of the vertical burning test of the multifunctional flame-retardant textile in Example 2 are shown. Detailed Implementation

[0025] This invention provides a method for preparing a multifunctional flame-retardant textile based on biomass, comprising the following steps:

[0026] 1) The cotton fabric was soaked in folic acid aqueous solution and then dried. The folic acid-treated cotton fabric was soaked in egg yolk aqueous solution and then dried. The cotton fabric was soaked alternately in folic acid aqueous solution and egg yolk aqueous solution to obtain pretreated cotton fabric.

[0027] 2) The pretreated cotton fabric was soaked in phytic acid aqueous solution and then dried to obtain a biomass-based multifunctional flame-retardant textile.

[0028] In this invention, the mass concentration of the folic acid aqueous solution in step 1) is preferably 0.1-1.5%, more preferably 0.5-1.2%, and even more preferably 0.8-1.0%; the pH value of the folic acid aqueous solution is preferably 3-5, and even more preferably 4.

[0029] In this invention, the folic acid aqueous solution is prepared by mixing folic acid, water, and acetic acid, and then shaking the mixture to obtain the folic acid aqueous solution. The pH value of the mixture is preferably 3-5, the shaking temperature is preferably 45-55℃, more preferably 47-52℃, and even more preferably 50℃. The shaking time is preferably 25-35 min, more preferably 27-32 min, and even more preferably 29-30 min. The shaking rate is preferably 50-100 round trips / min, more preferably 60-90 round trips / min, and even more preferably 70-80 round trips / min.

[0030] In this invention, the mass concentration of the egg yolk aqueous solution in step 1) is preferably 25-75%, more preferably 35-70%, and even more preferably 45-55%.

[0031] In this invention, the method for preparing the egg yolk aqueous solution is as follows: the egg white and egg yolk are separated using a separator, and the water and egg yolk are mixed and stirred to obtain the egg yolk aqueous solution; the stirring time is preferably 10-30 min, more preferably 12-25 min, and more preferably 15-20 min; the stirring speed is preferably 400-600 rpm, and more preferably 450-550 rpm.

[0032] In step 1) of the present invention, the soaking time in the folic acid aqueous solution and the soaking time in the egg yolk aqueous solution are preferably 8-12 min, more preferably 9-11 min, and more preferably 10 min; the drying temperature is preferably 55-65°C, more preferably 57-62°C, and more preferably 59-60°C.

[0033] In this invention, when the cotton fabric is alternately soaked in folic acid aqueous solution and egg yolk aqueous solution once, the number of layers deposited on the cotton fabric is 1.

[0034] In this invention, the number of layers deposited on the pretreated cotton fabric is preferably 1 to 3, and more preferably 2.

[0035] In step 1) of the present invention, the mass ratio of cotton fabric to folic acid aqueous solution and the mass ratio of cotton fabric to egg yolk aqueous solution are preferably 1:45 to 55, more preferably 1:47 to 52, and even more preferably 1:50.

[0036] In this invention, the mass concentration of the phytic acid aqueous solution in step 2) is preferably 5-20%, more preferably 8-16%, and even more preferably 10-15%.

[0037] In this invention, the soaking time in step 2) is preferably 8 to 12 minutes, more preferably 9 to 11 minutes, and even more preferably 10 minutes; the drying temperature is preferably 55 to 65°C, more preferably 57 to 62°C, and even more preferably 59 to 60°C.

[0038] The present invention also provides a biomass-based multifunctional flame-retardant textile prepared by the aforementioned preparation method.

[0039] The technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0040] Example 1

[0041] Dissolve folic acid evenly in water, adjust the pH of the solution to 5 with acetic acid, and then place the solution in a 50°C constant temperature water bath and shake at a rate of 70 rpm for 30 min to obtain a folic acid aqueous solution with a mass concentration of 1.5%. Separate the egg white and egg yolk using a separator, add water to the egg yolk, and then place it on a magnetic stirrer and stir at a rate of 500 rpm for 10 min to obtain an egg yolk aqueous solution with a mass concentration of 50%.

[0042] The cotton fabric was immersed in a 1.5% folic acid aqueous solution (the mass ratio of cotton fabric to folic acid aqueous solution was 1:50) for 10 minutes. After immersion, the cotton fabric was removed and dried at 60°C. Then, the cotton fabric was immersed in a 50% egg yolk aqueous solution (the mass ratio of cotton fabric to egg yolk aqueous solution was 1:50) for 10 minutes. After immersion, the cotton fabric was removed and dried at 60°C. After the cotton fabric was alternately immersed in folic acid aqueous solution and egg yolk aqueous solution 3 times, folic acid and egg yolk were deposited on the surface of the cotton fabric to form 3 layers of coating.

[0043] Water was added to phytic acid to prepare a phytic acid aqueous solution with a mass concentration of 15%. The cotton fabric with the folic acid and egg yolk coating deposited was immersed in the phytic acid aqueous solution (the mass ratio of the cotton fabric with the coating deposited to the phytic acid aqueous solution was 1:50). After immersion for 10 minutes, the cotton fabric was taken out and dried at 60°C to obtain a biomass-based coloring antibacterial and UV-resistant multifunctional flame-retardant textile.

[0044] Antibacterial tests were conducted on the multifunctional flame-retardant textile, blank group, and untreated cotton fabric of Example 1. The method was as follows: 0.75g of sample was weighed, cut into small pieces, and placed into 15mL centrifuge tubes according to the group. The tubes were then sterilized in a high-temperature and high-pressure steam sterilizer at 121℃ and 103kPa for 20min. The bacterial solution was diluted to 10 with sterile PBS solution. 5 CFU / mL, samples (multifunctional flame-retardant textiles and untreated cotton fabrics from Example 1) were transferred to Erlenmeyer flasks, and 70 mL of sterile PBS solution and 5 mL of diluted bacterial suspension were added respectively. The blank group was left untreated. The flasks were incubated at 37°C with a shaker for 18 h. After incubation, the bacterial suspension was serially diluted 10-fold with sterile PBS solution, and 100 μL of the diluted solution was evenly spread onto LB solid medium. The flasks were incubated at 37°C for 18 h, and the colony count was recorded. The colony count was the colony count result at the corresponding dilution factor for each group. The bacterial concentration (CFU / mL) was calculated as: colony count × dilution factor × 10 (0.1 mL spread). Antibacterial rate = (1 - bacterial concentration of experimental group / bacterial concentration of blank group) × 100%. The Staphylococcus aureus inhibition test of the multifunctional flame-retardant textiles, blank group, and untreated cotton fabrics from Example 1 was as follows. Figure 1 As shown in Table 1, the antibacterial rate results of the Staphylococcus aureus antibacterial test are presented. Figure 1 As shown in Table 1, the blank group and the untreated cotton fabric group had no antibacterial properties. The multifunctional flame-retardant textile prepared in Example 1 had an inhibition rate of 99.22% against Staphylococcus aureus, which showed good antibacterial properties.

[0045] Table 1. Results of Staphylococcus aureus antibacterial test on different samples

[0046]

[0047] The UV resistance test results of the multifunctional flame-retardant textile prepared in Example 1 and the untreated cotton fabric are shown in Table 2. As shown in Table 2, the UVA and UVB transmittance of the multifunctional flame-retardant textile prepared in Example 1 are 0.1% and 0%, respectively, and the UV protection factor (UPF) is 11445.82, indicating that it has good UV resistance.

[0048] Table 2. UV resistance test results of different samples

[0049] Sample UVA transmittance (%) UVB transmittance (%) Protection factor (UPF) Untreated cotton fabrics 8.03 4.02 20.39 Example 1 0.1 0 11445.82

[0050] The coloring effect of the multifunctional flame-retardant textile prepared in Example 1 is compared with the color of the untreated cotton fabric. Figure 2 As shown. The K / S value of the multifunctional flame-retardant textile of Example 1 is 7.1382, which is derived from... Figure 2 It can be seen that, compared with the white untreated cotton fabric, the multifunctional flame-retardant textile of Example 1 has a uniform yellow color, indicating that the multifunctional flame-retardant textile prepared in Example 1 has a good coloring effect.

[0051] Example 2

[0052] Dissolve folic acid evenly in water, adjust the pH of the solution to 5 with acetic acid, and then place the solution in a 50°C constant temperature water bath and shake at a rate of 70 rpm for 30 min to obtain a folic acid aqueous solution with a mass concentration of 1.5%. Separate the egg white and egg yolk using a separator, add water to the egg yolk, and then place it on a magnetic stirrer and stir at a rate of 450 rpm for 10 min to obtain an egg yolk aqueous solution with a mass concentration of 25%.

[0053] The cotton fabric was immersed in a 1.5% folic acid aqueous solution (the mass ratio of cotton fabric to folic acid aqueous solution was 1:50) for 10 minutes. After immersion, the cotton fabric was removed and dried at 60°C. Then, the cotton fabric was immersed in a 25% egg yolk aqueous solution (the mass ratio of cotton fabric to egg yolk aqueous solution was 1:50) for 10 minutes. After immersion, the cotton fabric was removed and dried at 60°C. The cotton fabric was alternately immersed in the folic acid aqueous solution and the egg yolk aqueous solution once. The folic acid and egg yolk deposited and assembled a coating on the surface of the cotton fabric.

[0054] Water was added to phytic acid to prepare a 5% phytic acid aqueous solution. The cotton fabric with the folic acid and egg yolk coating deposited was immersed in the phytic acid aqueous solution (the mass ratio of the cotton fabric with the coating to the phytic acid aqueous solution was 1:50). After immersion for 10 minutes, the cotton fabric was removed and dried at 60°C to obtain a biomass-based coloring antibacterial and UV-resistant multifunctional flame-retardant textile.

[0055] The vertical burning test results of the multifunctional flame-retardant textile prepared in Example 2 are as follows: Figure 3 As shown, by Figure 3 It can be seen that the damaged length of the multifunctional flame-retardant textile is 7.8cm, indicating that it has good flame-retardant properties.

[0056] Example 3

[0057] Folic acid was dissolved evenly in water, and acetic acid was added to adjust the pH of the solution to 4. The solution was then placed in a 47°C constant temperature water bath and shaken at a rate of 60 rpm for 32 min to obtain a folic acid aqueous solution with a mass concentration of 0.3%. Egg whites and yolks were separated using a separator. Water was added to the egg yolks, and the mixture was then placed on a magnetic stirrer and stirred at a rate of 550 rpm for 15 min to obtain an egg yolk aqueous solution with a mass concentration of 40%.

[0058] The cotton fabric was immersed in a 0.3% folic acid aqueous solution (the mass ratio of cotton fabric to folic acid aqueous solution was 1:47) for 9 minutes. After immersion, the cotton fabric was removed and dried at 58°C. Then, the cotton fabric was immersed in a 40% egg yolk aqueous solution (the mass ratio of cotton fabric to egg yolk aqueous solution was 1:47) for 9 minutes. After immersion, the cotton fabric was removed and dried at 58°C. After the cotton fabric was alternately immersed in folic acid aqueous solution and egg yolk aqueous solution twice, folic acid and egg yolk were deposited on the surface of the cotton fabric to form two coating layers.

[0059] Water was added to phytic acid to prepare a phytic acid aqueous solution with a mass concentration of 10%. The cotton fabric with the folic acid and egg yolk coating deposited was immersed in the phytic acid aqueous solution (the mass ratio of the cotton fabric with the coating deposited to the phytic acid aqueous solution was 1:47). After immersion for 9 minutes, the cotton fabric was taken out and dried at 58°C to obtain a biomass-based coloring antibacterial and UV-resistant multifunctional flame-retardant textile.

[0060] Example 4

[0061] Dissolve folic acid evenly in water, adjust the pH of the solution to 3 with acetic acid, and then place the solution in a 52°C constant temperature water bath and shake at a rate of 80 rpm for 28 min to obtain a folic acid aqueous solution with a mass concentration of 1.0%. Separate egg whites and yolks using a separator, add water to the egg yolks, and then place the mixture on a magnetic stirrer and stir at a rate of 520 rpm for 18 min to obtain an egg yolk aqueous solution with a mass concentration of 70%.

[0062] The cotton fabric was immersed in a 1.0% folic acid aqueous solution (the mass ratio of cotton fabric to folic acid aqueous solution was 1:52) for 11 minutes. After immersion, the cotton fabric was removed and dried at 62°C. Then, the cotton fabric was immersed in a 70% egg yolk aqueous solution (the mass ratio of cotton fabric to egg yolk aqueous solution was 1:52) for 11 minutes. After immersion, the cotton fabric was removed and dried at 62°C. After the cotton fabric was alternately immersed in the folic acid aqueous solution and the egg yolk aqueous solution twice, the folic acid and egg yolk were deposited on the surface of the cotton fabric to form two coating layers.

[0063] Water was added to phytic acid to prepare a phytic acid aqueous solution with a mass concentration of 15%. The cotton fabric with the folic acid and egg yolk coating deposited was immersed in the phytic acid aqueous solution (the mass ratio of the cotton fabric with the coating deposited to the phytic acid aqueous solution was 1:52). After immersion for 11 minutes, the cotton fabric was taken out and dried at 62°C to obtain a biomass-based coloring antibacterial and UV-resistant multifunctional flame-retardant textile.

[0064] Example 5

[0065] Dissolve folic acid evenly in water, adjust the pH of the solution to 5 with acetic acid, and then place the solution in a 50°C constant temperature water bath and shake at a rate of 90 rpm for 30 min to obtain a folic acid aqueous solution with a mass concentration of 1.0%. Separate the egg white and egg yolk using a separator, add water to the egg yolk, and then place it on a magnetic stirrer and stir at a rate of 500 rpm for 10 min to obtain an egg yolk aqueous solution with a mass concentration of 25%.

[0066] The cotton fabric was immersed in a 1.0% folic acid aqueous solution (the mass ratio of cotton fabric to folic acid aqueous solution was 1:50) for 10 minutes. After immersion, the cotton fabric was removed and dried at 60°C. Then, the cotton fabric was immersed in a 25% egg yolk aqueous solution (the mass ratio of cotton fabric to egg yolk aqueous solution was 1:50) for 10 minutes. After immersion, the cotton fabric was removed and dried at 60°C. After the cotton fabric was alternately immersed in folic acid aqueous solution and egg yolk aqueous solution 3 times, folic acid and egg yolk were deposited and assembled into 3 layers on the surface of the cotton fabric.

[0067] Water was added to phytic acid to prepare a 5% phytic acid aqueous solution. The cotton fabric with the folic acid and egg yolk coating deposited was immersed in the phytic acid aqueous solution (the mass ratio of the cotton fabric with the coating to the phytic acid aqueous solution was 1:50). After immersion for 10 minutes, the cotton fabric was removed and dried at 60°C to obtain a biomass-based coloring antibacterial and UV-resistant multifunctional flame-retardant textile.

[0068] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for the preparation of a multi-functional, flame-retardant textile based on biomass, characterized in that, The method comprises the following steps: 1) dipping and drying the cotton fabric in a water solution of folic acid, dipping and drying the folic acid treated cotton fabric in a water solution of egg yolk, and alternately dipping in the water solution of folic acid and the water solution of egg yolk to obtain a pretreated cotton fabric; 2) dipping and drying the pretreated cotton fabric in a water solution of phytic acid to obtain a biomass-based multifunctional flame-retardant textile; In step 1), the time for each dipping in the water solution of folic acid and the time for each dipping in the water solution of egg yolk are independently 8-12 min, and the drying temperature is independently 55-65℃; In step 1), the mass concentration of the water solution of folic acid is 0.1-1.5%, and the pH value of the water solution of folic acid is 3-5; In step 1), the mass concentration of the water solution of egg yolk is 25-75%; In step 2), the mass concentration of the water solution of phytic acid is 5-20%; In step 2), the dipping time is 8-12 min, and the drying temperature is 55-65℃.

2. The production method according to claim 1, characterized by, When the alternately dipping in the water solution of folic acid and the water solution of egg yolk is performed once, the number of layers deposited on the cotton fabric is 1 layer.

3. The production method according to claim 2, characterized by, The number of layers deposited on the pretreated cotton fabric is 1-3 layers.

4. The biomass-based multifunctional flame-retardant textile prepared by the preparation method according to any one of claims 1-3.

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