Skin-friendly non-sense cotton and preparation method thereof

Abstract

The present invention relates to a kind of skin-friendly non-sense cotton and preparation method thereof, and belongs to the technical field of polymer materials. The skin-friendly non-sense cotton includes, by weight: 60-100 parts of cotton fiber, 10-15 parts of catalyst, 10-20 parts of anti-wrinkle finishing agent, 5-10 parts of modified antibacterial agent, 5-10 parts of trimethylolpropane polyether, 2-5 parts of Chinese medicine ingredients, and 4-8 parts of deionized water; the anti-wrinkle finishing agent molecules enter the amorphous region of cotton fiber, tightly entangle with cellulose molecules, hinder the relative slip between cellulose molecules, and in addition, the isocyanate group is unblocked at high temperature, and forms a network structure with cotton fiber, enhances friction resistance and hydrogen bonding, and improves anti-wrinkle performance; in the modified antibacterial agent, stilbene and chitosan destroy bacterial cell membranes, cause nucleic acid and protein leakage, accelerate cell apoptosis, and inhibit bacteria and mite activities. The skin-friendly non-sense cotton prepared by the present invention not only has good comfort, but also has excellent anti-wrinkle, anti-mite and antibacterial properties.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to skin-friendly non-sense cotton and a preparation method thereof. Background Art

[0002] As an important natural fiber material, cotton is widely used in clothing, bedding, curtains, home decorations and medical fields because of its softness, breathability and excellent moisture absorption. With the improvement of living standards, people's demand for skin-friendly and non-sense cotton is growing.

[0003] The core of cotton fiber is cellulose macromolecules, which are tightly connected by hydrogen bonds and van der Waals forces. However, under the influence of moisture or external forces, hydrogen bonds are easily broken, causing fiber deformation and difficult to recover, resulting in easy wrinkling of cotton fabrics. In addition, the macromolecular chains in the amorphous region of cotton fibers are arranged loosely, with fewer hydrogen bonds and lack of sufficient cross-linking to resist external force deformation. Therefore, during wearing and use, once subjected to external forces, some hydrogen bonds in cotton fibers will be destroyed and reorganized in new positions, resulting in the inability of cellulose macromolecules to quickly recover to their original state, which may lead to permanent deformation, exacerbating the generation and deepening of wrinkles. In addition, the surface of cotton fibers is relatively smooth, and there are many pores inside, which are easy to adsorb and store bacteria, causing human diseases and cotton loss. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a skin-friendly and non-sense cotton and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A skin-friendly non-sense cotton comprises the following raw materials in parts by weight: 60-100 parts of cotton fiber, 10-15 parts of a catalyst, 10-20 parts of an anti-wrinkle finishing agent, 5-10 parts of a modified antibacterial agent, 5-10 parts of trimethylolpropane polyether, 2-5 parts of a traditional Chinese medicine component, and 4-8 parts of deionized water;

[0007] The catalyst is triethylamine;

[0008] The traditional Chinese medicine ingredient is matrine.

[0009] The anti-wrinkle finishing agent is prepared by the following method:

[0010] Step A1: polypropylene glycol 2000, 2,2-dihydroxymethylbutyric acid and dibutyltin dilaurate are uniformly mixed, the temperature is raised to 80°C, hexamethylene diisocyanate trimer is added under nitrogen protection, and the reaction is carried out for 3 hours to obtain an intermediate product. The reaction route can be expressed as follows:

[0011]

[0012] Further, the mass ratio of polypropylene glycol 2000, 2,2-dihydroxymethylbutyric acid, dibutyltin dilaurate, and hexamethylene diisocyanate trimer is 6.9-7.5: 0.5-0.7: 0.05-0.06: 4.8-5.3;

[0013] Step A2: The intermediate product, acetone and triethylamine are mixed, reacted at room temperature for 30 minutes, and then 3-aminopropyltriethoxysilane is added, the temperature is raised to 45°C, the reaction is performed for 1 hour, and finally deionized water is added and stirred for 30 minutes to obtain an anti-wrinkle finishing agent. The reaction route can be expressed as follows:

[0014]

[0015] Furthermore, the mass ratio of the intermediate product, acetone, triethylamine, 3-aminopropyltriethoxysilane and deionized water is 100-200:15-20:2.15:1.2:90-130.

[0016] The modified antibacterial agent is prepared by the following method:

[0017] Step B1: Chitosan and NaOH solution were stirred at room temperature for 3 h, frozen at −20 °C for 24 h, γ-glycidyloxypropyltrimethoxysilane and ethanol were added, heated to 60 °C, reacted for 6 h, and then paraformaldehyde, acetic acid solution and pterostilbene were added, stirred at 90 °C for 30 min, washed, and rotary evaporated to obtain the pre-product;

[0018] Furthermore, the dosage ratio of chitosan, NaOH solution, γ-glycidyloxypropyltrimethoxysilane, ethanol, paraformaldehyde, acetic acid solution, and pterostilbene is 0.05-0.08 mol: 15 mL: 0.025 mol: 0.3-0.4 mol: 0.1-0.16 mol: 50 mL: 0.1-0.16 mol, the mass fraction of NaOH solution is 50%, and the mass fraction of acetic acid solution is 40%;

[0019] Step B2: Mix the pre-product and N,N-dimethylformamide, heat to 60°C, add vanillic acid and dimethyl sulfoxide and stir for 4 hours, adjust the pH of the solution to 5.5 with 0.1 mol / L hydrochloric acid, stir at room temperature for 24 hours, and vacuum dry to obtain a modified antibacterial agent;

[0020] Furthermore, the usage ratio of the preproduct, vanillic acid, dimethyl sulfoxide and N,N-dimethylformamide is 1 mol:0.5-1.5 mol:10 mL:0.1 mL.

[0021] A method for preparing skin-friendly non-sense cotton specifically comprises the following steps:

[0022] S1: weighing raw materials according to weight, putting the Chinese medicinal ingredients into a grinder for grinding, and then mixing with cotton fiber, catalyst, modified antibacterial agent, trimethylolpropane polyether and deionized water, stirring at a speed of 150-300 rpm for 15 minutes, and drawing to obtain yarn;

[0023] S2: dyeing the yarn, and weaving it on an automatic air-jet loom with a width of 160 cm, a warp density of 250 yarns / 10 cm, and a weft density of 220 yarns / 10 cm to obtain a green cloth;

[0024] S3: Dip the raw cloth into the impregnation liquid of the anti-wrinkle finishing agent at a pressure of 4-25 kg / cm and a liquid carrying rate of 72-88%, and dry at 140-180° C. for 1-5 hours to obtain skin-friendly and non-sense cotton.

[0025] Beneficial effects of the present invention:

[0026] The wrinkle-resistant finishing agent prepared by the invention comprises the following steps: firstly, under the action of a catalyst, dibutyltin dilaurate, the isocyanate group of a hexamethylene diisocyanate trimer and the hydroxyl group of polypropylene glycol 2000 are reacted to form a carbamate bond, and then a hydrophilic chain extender 2,2-dimethylolbutyric acid is introduced to synthesize an intermediate product. In the process, the 2,2-dimethylolbutyric acid not only serves as a chain extender, but also affects the length of the molecular chain of the wrinkle-resistant finishing agent. When the chain length increases, the anti-wrinkle finishing agent can more effectively enter the amorphous region of cotton and enhance the wrinkle-resistant effect. Secondly, a neutralizing agent, triethylamine, is reacted with the carboxyl group of the intermediate product, and then a silane coupling agent, 3-aminopropyltriethoxysilane, is used as a blocking segment to react with the isocyanate group in the intermediate product to generate a carbamate bond, thereby synthesizing the wrinkle-resistant finishing agent. The prepared anti-wrinkle finishing agent molecules can enter the amorphous area of ​​cotton fibers, tightly entangle with cellulose molecules, effectively hinder the relative slippage between cellulose molecules, and achieve a significant anti-wrinkle effect; in addition, after high-temperature heat treatment, the blocked isocyanate groups in the anti-wrinkle finishing agent are unblocked and the reaction activity is restored, and then react with the hydroxyl groups in the cotton fiber macromolecules to form a strong network cross-linked structure. This structure further limits the relative displacement of the fiber molecular chains by enhancing friction resistance and hydrogen bonding, thereby giving cotton excellent anti-wrinkle properties.

[0027] The modified antibacterial agent prepared by the present invention firstly utilizes the hydroxyl group of chitosan to react with the epoxy group of γ-glycidyloxypropyltrimethoxysilane, and then grafts stilbene onto chitosan to obtain a pre-product; secondly, under the action of catalyst N,N-dimethylformamide, the hydroxyl group of the pre-product is esterified with the carboxyl group of vanillic acid to synthesize the modified antibacterial agent. Among the modified antibacterial agents, stilbene, a natural polyphenol compound, exhibits excellent anti-mite and antibacterial properties. It can effectively destroy bacterial cell membranes, cause internal structure collapse, nucleic acid and protein leakage, induce the generation of active oxygen, accelerate cell apoptosis, and combine with natural antibacterial substance chitosan to enhance the inhibitory effect on bacteria and fungi; chitosan is positively charged in an acidic or neutral environment, and can be firmly adsorbed on the negatively charged bacterial cell wall to destroy its structural integrity. In addition, chitosan may also enter the cell wall through osmosis, causing cell wall rupture or hole formation, further destroying the cell membrane, thereby effectively inhibiting bacterial activity.

[0028] The skin-friendly non-sense cotton prepared by the present invention is delicate and soft, with excellent comfort, and has both excellent wrinkle resistance and excellent antibacterial properties. The Chinese medicinal ingredients incorporated significantly enhance its anti-mite and antibacterial capabilities, ensuring health and safety during wearing. The skin-friendly non-sense cotton can not only effectively inhibit bacterial growth and extend the service life of clothing, but also perfectly fit the high-quality life concept pursued by modern people, showing broad application prospects. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1:

[0030] A method for preparing skin-friendly non-sense cotton specifically comprises the following steps:

[0031] S1: Weigh the raw materials by weight, including 60 parts of cotton fiber, 10 parts of catalyst, 10 parts of anti-wrinkle finishing agent (prepared in this embodiment), 5 parts of modified antibacterial agent (prepared in this embodiment), 5 parts of trimethylolpropane polyether, 2 parts of traditional Chinese medicine ingredients, and 4 parts of deionized water, put matrine into a grinder for grinding, and then mix it with cotton fiber, triethylamine, modified antibacterial agent, trimethylolpropane polyether and deionized water, stir at a speed of 150 rpm for 15 minutes, and draw to obtain yarn;

[0032] S2: dyeing the yarn, and weaving it on an automatic air-jet loom with a width of 160 cm, a warp density of 250 yarns / 10 cm, and a weft density of 220 yarns / 10 cm to obtain a green cloth;

[0033] S3: Dip the green cloth into the impregnation liquid of the anti-wrinkle finishing agent at a pressure of 4-25 kg / cm and a liquid carrying rate of 72-88%, and dry at 140° C. for 1-5 hours to obtain skin-friendly cotton;

[0034] The anti-wrinkle finishing agent is prepared by the following method:

[0035] Step A1: 6.9 g of polypropylene glycol 2000, 0.5 g of 2,2-dihydroxymethylbutyric acid and 0.05 g of dibutyltin dilaurate were mixed evenly, the temperature was raised to 80° C., 4.8 g of hexamethylene diisocyanate trimer was added under nitrogen protection, and the mixture was reacted for 3 h to obtain an intermediate product;

[0036] Step A2: 100 g of the intermediate product, 15 g of acetone and 2.15 g of triethylamine were mixed, reacted at room temperature for 30 min, then 1.2 g of 3-aminopropyltriethoxysilane was added, the temperature was raised to 45° C., the reaction was continued for 1 h, and finally 90 g of deionized water was added and stirred for 30 min to obtain an anti-wrinkle finishing agent;

[0037] The modified antibacterial agent is prepared by the following method:

[0038] Step B1: 0.05 mol chitosan and 15 mL NaOH solution were stirred at room temperature for 3 h, and then frozen at −20 ° C for 24 h. 0.025 mol γ-glycidyloxypropyltrimethoxysilane and 0.3 mol ethanol were added, heated to 60 ° C, reacted for 6 h, and then 0.1 mol paraformaldehyde, 50 mL acetic acid solution and 0.1 mol pterostilbene were added. The mixture was stirred at 90 ° C for 30 min, washed, and rotary evaporated to obtain the pre-product. The mass fraction of the NaOH solution was 50%, and the mass fraction of the acetic acid solution was 40%;

[0039] Step B2: Mix 1 mol of the pre-product and 0.1 mL of N,N-dimethylformamide, heat to 60°C, add 0.5 mol of vanillic acid and 10 mL of dimethyl sulfoxide and stir for 4 h, adjust the pH of the solution to 5.5 with 0.1 mol / L hydrochloric acid, stir at room temperature for 24 h, and vacuum dry to obtain the modified antibacterial agent. Embodiment 2:

[0040] A method for preparing skin-friendly non-sense cotton specifically comprises the following steps:

[0041] S1: Weigh the raw materials by weight, including 80 parts of cotton fiber, 13 parts of catalyst, 15 parts of anti-wrinkle finishing agent (prepared in this embodiment), 7 parts of modified antibacterial agent (prepared in this embodiment), 7 parts of trimethylolpropane polyether, 4 parts of traditional Chinese medicine ingredients, and 6 parts of deionized water, put matrine into a grinder for grinding, and then mix it with cotton fiber, triethylamine, modified antibacterial agent, trimethylolpropane polyether and deionized water, stir at a speed of 170 rpm for 15 minutes, and draw to obtain yarn;

[0042] S2: dyeing the yarn, and weaving it on an automatic air-jet loom with a width of 160 cm, a warp density of 250 yarns / 10 cm, and a weft density of 220 yarns / 10 cm to obtain a green cloth;

[0043] S3: Dipping the green cloth in the impregnation liquid of the anti-wrinkle finishing agent at a pressure of 4-25 kg / cm and a liquid carrying rate of 72-88%, and drying at 160° C. for 1-5 hours to obtain skin-friendly cotton;

[0044] The anti-wrinkle finishing agent is prepared by the following method:

[0045] Step A1: 7.2 g of polypropylene glycol 2000, 0.6 g of 2,2-dihydroxymethylbutyric acid and 0.055 g of dibutyltin dilaurate were mixed evenly, the temperature was raised to 80° C., 5.1 g of hexamethylene diisocyanate trimer was added under nitrogen protection, and the mixture was reacted for 3 h to obtain an intermediate product;

[0046] Step A2: 150 g of the intermediate product, 17 g of acetone and 2.15 g of triethylamine were mixed, reacted at room temperature for 30 min, 1.2 g of 3-aminopropyltriethoxysilane was added, the temperature was raised to 45°C, the reaction was continued for 1 h, and finally 110 g of deionized water was added and stirred for 30 min to obtain an anti-wrinkle finishing agent;

[0047] The modified antibacterial agent is prepared by the following method:

[0048] Step B1: 0.65 mol chitosan and 15 mL NaOH solution were stirred at room temperature for 3 h, and then frozen at −20 ° C for 24 h. 0.025 mol γ-glycidyloxypropyltrimethoxysilane and 0.35 mol ethanol were added, heated to 60 ° C, reacted for 6 h, and then 0.13 mol paraformaldehyde, 50 mL acetic acid solution and 0.13 mol pterostilbene were added. The mixture was stirred at 90 ° C for 30 min, washed, and rotary evaporated to obtain the pre-product. The mass fraction of the NaOH solution was 50%, and the mass fraction of the acetic acid solution was 40%;

[0049] Step B2: Mix 1 mol of the pre-product and 0.1 mL of N,N-dimethylformamide, heat to 60°C, add 1 mol of vanillic acid and 10 mL of dimethyl sulfoxide and stir for 4 h, adjust the pH of the solution to 5.5 with 0.1 mol / L hydrochloric acid, stir at room temperature for 24 h, and vacuum dry to obtain the modified antibacterial agent. Embodiment 3:

[0050] A method for preparing skin-friendly non-sense cotton specifically comprises the following steps:

[0051] S1: Weigh the raw materials by weight, including 100 parts of cotton fiber, 15 parts of catalyst, 20 parts of anti-wrinkle finishing agent (prepared in this embodiment), 10 parts of modified antibacterial agent (prepared in this embodiment), 10 parts of trimethylolpropane polyether, 5 parts of traditional Chinese medicine ingredients, and 8 parts of deionized water, put matrine into a grinder for grinding, and then mix it with cotton fiber, triethylamine, modified antibacterial agent, trimethylolpropane polyether and deionized water, stir at a speed of 300 rpm for 15 minutes, and draw to obtain yarn;

[0052] S2: dyeing the yarn, and weaving it on an automatic air-jet loom with a width of 160 cm, a warp density of 250 yarns / 10 cm, and a weft density of 220 yarns / 10 cm to obtain a green cloth;

[0053] S3: Dipping the green cloth in the impregnation liquid of the anti-wrinkle finishing agent at a pressure of 4-25 kg / cm and a liquid carrying rate of 72-88%, and drying at 180° C. for 1-5 hours to obtain skin-friendly cotton;

[0054] The anti-wrinkle finishing agent is prepared by the following method:

[0055] Step A1: 7.5 g of polypropylene glycol 2000, 0.7 g of 2,2-dihydroxymethylbutyric acid and 0.06 g of dibutyltin dilaurate were mixed evenly, the temperature was raised to 80° C., 5.3 g of hexamethylene diisocyanate trimer was added under nitrogen protection, and the mixture was reacted for 3 h to obtain an intermediate product;

[0056] Step A2: 200 g of the intermediate product, 20 g of acetone and 2.15 g of triethylamine were mixed, reacted at room temperature for 30 min, 1.2 g of 3-aminopropyltriethoxysilane was added, the temperature was raised to 45° C., the reaction was continued for 1 h, and finally 130 g of deionized water was added and stirred for 30 min to obtain an anti-wrinkle finishing agent;

[0057] The modified antibacterial agent is prepared by the following method:

[0058] Step B1: 0.08 mol chitosan and 15 mL NaOH solution were stirred at room temperature for 3 h, and then frozen at −20 ° C for 24 h. 0.025 mol γ-glycidyloxypropyltrimethoxysilane and 0.4 mol ethanol were added, heated to 60 ° C, reacted for 6 h, and then 0.16 mol paraformaldehyde, 50 mL acetic acid solution and 0.16 mol pterostilbene were added. The mixture was stirred at 90 ° C for 30 min, washed, and rotary evaporated to obtain the pre-product. The mass fraction of the NaOH solution was 50%, and the mass fraction of the acetic acid solution was 40%;

[0059] Step B2: Mix 1 mol of the pre-product and 0.1 mL of N,N-dimethylformamide, heat to 60°C, add 1.5 mol of vanillic acid and 10 mL of dimethyl sulfoxide and stir for 4 h, adjust the pH of the solution to 5.5 with 0.1 mol / L hydrochloric acid, stir at room temperature for 24 h, and vacuum dry to obtain the modified antibacterial agent.

[0060] Comparative Example 1

[0061] This comparative example is a skin-friendly non-sense cotton, which differs from Example 3 in that an equal amount of glyoxal is used to replace the anti-wrinkle finishing agent prepared in Example 3, and the rest are the same.

[0062] Comparative Example 2

[0063] This comparative example is a skin-friendly cotton. The difference from Example 3 is that an equal amount of DuPont Silver Shield 930 silver ion antibacterial agent is used to replace the modified antibacterial agent prepared in Example 3, and the rest are the same.

[0064] Performance test: The skin-friendly non-sense cotton obtained in Examples 1-3 and Comparative Examples 1-2 was cut into standard test sizes, and the wrinkle recovery angle test was performed according to GB / T3819-1997, the antibacterial test was performed with reference to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method", and the anti-mite test was performed according to the standard GB / T2912.2-2009. According to the JISL 1096 standard, the stiffness R is used to represent the softness of the fabric. The smaller the R value, the softer the fabric (R for pure cotton is 3.46); the test results are shown in the following table:

[0065]

[0066] It can be seen from the test data in the table that the skin-friendly and non-sensitive cotton prepared in Example 1 has excellent anti-mite and antibacterial effects. It can also be seen from the above table that the skin-friendly and non-sensitive cotton prepared by the present invention has good anti-wrinkle performance, is softer, and better fits the human body.

[0067] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing skin-friendly non-sense cotton, characterized in that: The following steps are involved: S1: Put the Chinese medicinal ingredients into a grinder for grinding, then mix with cotton fiber, catalyst, modified antibacterial agent, trimethylolpropane polyether and deionized water, stir at a speed of 150-300 rpm for 15 minutes, draw and obtain yarn; S2: dyeing the yarn, and weaving it on an automatic air-jet loom with a width of 160 cm, a warp density of 250 yarns / 10 cm, and a weft density of 220 yarns / 10 cm to obtain a green cloth; S3: Dipping the green cloth in the impregnation liquid of the anti-wrinkle finishing agent at a pressure of 4-25 kg / cm and a liquid carrying rate of 72-88%, and drying at 140-180° C. for 1-5 hours to obtain skin-friendly cotton; The anti-wrinkle finishing agent is prepared by the following method: Step A1: polypropylene glycol 2000, 2,2-dihydroxymethylbutyric acid and dibutyltin dilaurate are uniformly mixed, the temperature is raised to 80° C., hexamethylene diisocyanate trimer is added under nitrogen protection, and the reaction is carried out for 3 hours to obtain an intermediate product; Step A2: The intermediate product, acetone and triethylamine are mixed, reacted at room temperature for 30 minutes, 3-aminopropyltriethoxysilane is added, the temperature is raised to 45°C, reacted for 1 hour, and finally deionized water is added and stirred for 30 minutes to obtain an anti-wrinkle finishing agent; The modified antibacterial agent is prepared by the following method: Step B1: Chitosan and NaOH solution were stirred at room temperature for 3 h, frozen at −20 °C for 24 h, γ-glycidyloxypropyltrimethoxysilane and ethanol were added, heated to 60 °C, reacted for 6 h, and then paraformaldehyde, acetic acid solution and pterostilbene were added, stirred at 90 °C for 30 min, washed, and rotary evaporated to obtain the pre-product; Step B2: Mix the pre-product and N,N-dimethylformamide, heat to 60°C, add vanillic acid and dimethyl sulfoxide and stir for 4 hours, adjust the pH of the solution to 5.5 with 0.1 mol / L hydrochloric acid, stir at room temperature for 24 hours, and vacuum dry to obtain the modified antibacterial agent.

2. The method for preparing skin-friendly non-sense cotton according to claim 1, characterized in that: In step A1, the mass ratio of polypropylene glycol 2000, 2,2-dihydroxymethylbutyric acid, dibutyltin dilaurate, and hexamethylene diisocyanate trimer is 6.9-7.5: 0.5-0.7: 0.05-0.06: 4.8-5.

3.

3. The method for preparing skin-friendly non-sense cotton according to claim 1, characterized in that: The mass ratio of the intermediate product, acetone, triethylamine, 3-aminopropyltriethoxysilane and deionized water in step A2 is 100-200:15-20:2.15:1.2:90-130.

4. The method for preparing skin-friendly non-sense cotton according to claim 1, characterized in that: In step B1, the dosage ratio of chitosan, NaOH solution, γ-glycidyloxypropyltrimethoxysilane, ethanol, paraformaldehyde, acetic acid solution and pterostilbene is 0.05-0.08 mol: 15 mL: 0.025 mol: 0.3-0.4 mol: 0.1-0.16 mol: 50 mL: 0.1-0.16 mol, the mass fraction of NaOH solution is 50%, and the mass fraction of acetic acid solution is 40%.

5. The method for preparing skin-friendly non-sense cotton according to claim 1, characterized in that: In step B2, the usage ratio of the pre-product, vanillic acid, dimethyl sulfoxide and N,N-dimethylformamide is 1 mol: 0.5-1.5mol:10mL:0.1mL.

6. The method for preparing skin-friendly non-sense cotton according to claim 1, characterized in that: The catalyst is triethylamine and the traditional Chinese medicine ingredient is matrine.

7. A skin-friendly cotton, characterized in that: Prepared according to the preparation method according to any one of claims 1 to 6.

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