Method for improving blood-absorbing, water-absorbing and antibacterial properties of plant fiber fabric

Abstract

A method for improving blood-absorbing, water-absorbing and antibacterial properties of plant fiber fabrics relates to the technical field of improvement of properties of plant fiber fabrics and is characterized by comprising the steps of (1) weighing 10 parts of sodium periodate, (2) taking cellulose fabrics, (3) washing the cellulose fabrics treated in the step (2) for three times, (4) preparing 0.25-5mg / mL dopamine hydrochloride solution, (5) adding the dopamine hydrochloride solution into the cellulose fabrics, and (6) drying the cellulose fabrics. The method comprises the following steps: (1) preparing a dopamine hydrochloride solution, (2) preparing a cellulose fabric, (3) preparing a dopamine hydrochloride solution, (5) immersing the cellulose fabric treated in the step (3) into the dopamine hydrochloride solution prepared in the step (4), (6) preparing a 0.25-2wt% sodium alginate solution, (7) immersing the cellulose fabric treated in the step (5) into the sodium alginate solution obtained in the step (6), (8) preparing a 0.25-4wt% chitosan and chitosan quaternary ammonium salt mixture solution, and (7) preparing a chitosan-chitosan quaternary ammonium salt mixture solution. And (9) immersing the cellulose fabric treated in the step (7) into the chitosan and chitosan quaternary ammonium salt mixture solution in the step (8). The method provided by the invention can realize double improvement of economic benefits and environmental benefits.

Description

Technical Field

[0001] The invention relates to the technical field of improving the performance of plant fiber fabrics, in particular to a method for improving the blood and water absorption and antibacterial performance of plant fiber fabrics. Background Art

[0002] Cellulose-based textiles are widely used in clothing, towels, menstrual products (sanitary napkins, tampons), etc. Currently, the sanitary napkins and tampons on the market mainly rely on superabsorbent materials as the main matrix. This type of matrix is ​​made by hydrophilic modification of ordinary plant fibers (such as cotton). Tampons are only improved in the way of use. However, tampons and sanitary napkins have their own advantages and disadvantages. Generally speaking, sanitary napkins are still the mainstream of the market.

[0003] As the main matrix of sanitary napkins or tampons, it is required to have a large water and blood absorption capacity and a certain antibacterial property. Currently, menstrual products with antibacterial properties are relatively rare in the market, and giving menstrual products antibacterial properties can prevent menstrual infections. Therefore, in the development of new sanitary napkins or tampon matrices, there is still a great demand for combining antibacterial properties with water and blood absorption characteristics. Summary of the invention

[0004] The purpose of the present invention is to provide a method for improving the blood absorption, water absorption and antibacterial properties of plant fiber fabrics, so as to achieve the purpose of adopting a simple, feasible, green and environmentally friendly modification process to significantly improve the water absorption, blood absorption and antibacterial properties of existing cellulose-based textiles.

[0005] The method for improving the blood and water absorption and antibacterial properties of plant fiber fabrics provided by the present invention is characterized by comprising the following steps: Step (1), weigh 10 parts of sodium periodate ("parts" are measured by mass, the same below), add 1000 parts of water to dissolve, and obtain a 10 mg / mL sodium periodate solution; Step (2), taking a cellulose fabric, completely immersing it in the sodium periodate solution obtained in step (1), and stirring it in the dark for 48-72 hours; Step (3), washing the cellulose fabric obtained in step (2) with water three times and drying at room temperature; Step (4), preparing a 0.25-5 mg / mL dopamine hydrochloride solution, and adjusting the pH to 5-9 with a 1 M NaOH solution; Step (5), immersing the cellulose fabric obtained in step (3) in the dopamine hydrochloride solution prepared in step (4), shaking for 24 hours, washing with water three times, and drying at room temperature; Step (6), prepare a 0.25-2wt% sodium alginate solution, and adjust the pH to 5-8 with a 0.1M NaOH solution; Step (7), immersing the cellulose fabric obtained in step (5) in the sodium alginate solution obtained in step (6), shaking for 24 hours, washing with water three times, and drying at room temperature; Step (8), preparing a 0.25-4wt% solution of a mixture of chitosan and chitosan quaternary ammonium salt, and adjusting the pH to 5-7 with a 0.1M NaOH solution; Step (9), immersing the cellulose fabric obtained in step (7) in the mixture solution of chitosan and chitosan quaternary ammonium salt in step (8), shaking for 24 hours, washing with water for 3 times, and freeze-drying to obtain the fabric.

[0006] Furthermore, the cellulose fabric in step (2) is made of plant fiber.

[0007] Furthermore, the mass ratio of the cellulose fabric weighed in step (2) to the sodium periodate in step (1) is (1-4):1.

[0008] Furthermore, in step (5), the amount of dopamine hydrochloride is 0.25-5% of the mass of the cellulose fabric.

[0009] Furthermore, in step (7), the sodium alginate is 0.5-10% of the mass of the cellulose fabric.

[0010] Furthermore, the 0.25-4wt% chitosan and chitosan quaternary ammonium salt mixture solution in step (8) is prepared by mixing chitosan and chitosan quaternary ammonium salt in a mass ratio of (5-10):1.

[0011] Furthermore, in step (9), the total mass of chitosan and chitosan quaternary ammonium salt is 0.5-10% of the mass of the cellulose fabric.

[0012] The method for improving the blood and water absorption and antibacterial properties of plant fiber fabrics provided by the present invention is based on existing cellulose-based textiles, and is successively soaked in sodium periodate solution, dopamine hydrochloride solution, sodium alginate solution, and chitosan and chitosan quaternary ammonium salt mixture solution, and creatively combines sodium periodate oxidation with dopamine in-situ polymerization to modify the fiber material. The positive effects are mainly reflected in: 1. The method of the present invention utilizes the oxidizing property of sodium periodate to oxidize the vicinal diol structure in the sugar skeleton of cellulose to generate aldehyde groups. After washing to remove excess sodium periodate, dopamine is added under alkaline conditions, and the following two reactions occur: one is the formation of a Schiff base bond between the amino group of dopamine and the aldehyde group, and the other is a dopamine polymerization reaction. The generation of aldehyde groups enables the formed dopamine polymer to be firmly adsorbed onto the fiber, which not only improves the adsorption efficiency of polydopamine on the fiber fabric, but also enhances the binding stability of polydopamine and cellulose fabric, providing a basis for subsequent material modification.

[0013] 2. The method of the present invention utilizes the adsorption effect of alginate, chitosan and their derivatives, which greatly improves the water absorption performance of the modified material.

[0014] 3. The method of the present invention adopts a mixture solution of chitosan and chitosan quaternary ammonium salt, which has good antibacterial activity, can inhibit the growth and reproduction of some fungi, bacteria, and viruses, and improve the antibacterial properties of plant fiber fabrics.

[0015] 4. The materials required for the method of the present invention are simple, easy to obtain, green and environmentally friendly, and the modification process is easy to operate, which significantly improves the water absorption, blood absorption and antibacterial properties of existing cellulose-based textiles. The modified materials can be used for the development of sanitary napkin substrates, tampons and medical dressings in the later stage.

[0016] 5. The mass ratio of dopamine hydrochloride, sodium alginate, chitosan and chitosan quaternary ammonium salt to cellulose fabric is controlled in the method of the present invention respectively because the concentration of dopamine hydrochloride is small and the adsorption amount is small, which is not conducive to the reaction. However, when the concentration of dopamine hydrochloride is too large, dopamine forms free nanoparticles and cannot be effectively adsorbed on the surface of plant fibers, resulting in waste. The mass of sodium alginate, chitosan and chitosan quaternary ammonium salt is adjusted in turn according to the mass of dopamine hydrochloride, and the method of the present invention can achieve a dual improvement in economic and environmental benefits. DETAILED DESCRIPTION Example

[0017] Weigh 10g of sodium periodate, dissolve it in water and dilute it to 1L to prepare a 10mg / mL solution, then weigh 20g of a commercially available plant fiber face towel, immerse it in the sodium periodate solution, and stir to react for 72 hours in the dark. After the reaction is completed, take out the face towel, wash it with water 3 times, and dry it at room temperature for later use.

[0018] 200 mL of 1 mg / mL dopamine hydrochloride solution was prepared, and the pH was adjusted to 7 using 1 M NaOH solution, and then the plant fiber face washcloth prepared above was immersed in it, shaken for 24 hours, washed with water 3 times, and dried at room temperature. At this time, the dopamine hydrochloride was 1% of the mass of the face washcloth.

[0019] 250 mL of 1 wt% sodium alginate solution was prepared, and the pH was adjusted to 6 using 0.1 M NaOH solution. The face washcloth treated with the dopamine hydrochloride solution was immersed in the solution, and the reaction was shaken for 24 hours, washed with water 3 times, and dried at room temperature. At this time, the sodium alginate content was 1.25% of the mass of the face washcloth.

[0020] Chitosan and chitosan quaternary ammonium salt were mixed in a mass ratio of 9:1 to prepare 250 mL of a 1wt% mixed solution. A 0.1M NaOH solution was used to adjust the pH to 6, and the face washcloth obtained by soaking in sodium alginate was immersed therein, shaken for 24 hours, washed with water 3 times, and freeze-dried to obtain a modified face washcloth material. At this time, the total mass of chitosan and chitosan quaternary ammonium salt was 1.25% of the mass of the face washcloth. Example

[0021] Weigh 10g of sodium periodate, dissolve it in water and dilute it to 1L to prepare a 10mg / mL solution, then weigh 20g of commercially available tampons, immerse them in the sodium periodate solution, and stir to react for 72 hours in the dark. After the reaction is completed, take out the tampons, wash them with water 3 times, and dry them at room temperature for later use.

[0022] 200 mL of 1 mg / mL dopamine hydrochloride solution was prepared, and the pH was adjusted to 7 using 1M NaOH solution, and then the prepared tampon was immersed in it, shaken for 24 hours, washed with water 3 times, and dried at room temperature. At this time, the dopamine hydrochloride was 1% of the mass of the tampon.

[0023] 250 mL of 1 wt% sodium alginate solution was prepared, and the pH was adjusted to 6 using 0.1 M NaOH solution. The tampon treated with dopamine hydrochloride solution was immersed in the solution, and the reaction was shaken for 24 hours, washed with water 3 times, and dried at room temperature. At this time, the sodium alginate content was 1.25% of the mass of the tampon.

[0024] Chitosan and chitosan quaternary ammonium salt were mixed in a mass ratio of 9:1 to form a mixed solution of 250 mL of 1 wt%. A 0.1 M NaOH solution was used to adjust the pH to 6, and the tampon obtained by the sodium alginate soaking treatment was immersed therein, shaken for 24 hours, washed with water 3 times, and freeze-dried to obtain a modified tampon material. At this time, the total mass of chitosan and chitosan quaternary ammonium salt was 1.25% of the mass of the tampon.

[0025] Untreated commercially available face washcloth materials and commercially available tampons were used as blank control groups. The physicochemical and microbiological indicators were as follows: The above is only an embodiment of the present invention, and is not any formal or substantial limitation of the present invention. For those skilled in the art, without departing from the method of the present invention, modifications, supplements and substitutions can be made, and these modifications, supplements and substitutions should also be within the scope of protection of the present invention. Any equivalent changes made by those skilled in the art using the technical content disclosed above without departing from the spirit and scope of the present invention are all equivalent embodiments of the present invention; any equivalent changes made to the above embodiments based on the essential technology of the present invention, modifications, supplements and substitutions, still fall within the scope of the technical solution of the present invention.

Claims

1. A method for improving the blood and water absorption and antibacterial properties of plant fiber fabrics, characterized in that: The following steps are involved: Step (1), weigh 10 parts of sodium periodate ("parts" are measured by mass, the same below), add 1000 parts of water to dissolve, and obtain a 10 mg / mL sodium periodate solution; Step (2), taking a cellulose fabric, completely immersing it in the sodium periodate solution obtained in step (1), and stirring it in the dark for 48-72 hours; Step (3), washing the cellulose fabric obtained in step (2) with water three times and drying at room temperature; Step (4), preparing a 0.25-5 mg / mL dopamine hydrochloride solution, and adjusting the pH to 5-9 with a 1 M NaOH solution; Step (5), immersing the cellulose fabric obtained in step (3) in the dopamine hydrochloride solution prepared in step (4), shaking for 24 hours, washing with water three times, and drying at room temperature; Step (6), prepare a 0.25-2wt% sodium alginate solution, and adjust the pH to 5-8 with a 0.1M NaOH solution; Step (7), immersing the cellulose fabric obtained in step (5) in the sodium alginate solution obtained in step (6), shaking for 24 hours, washing with water three times, and drying at room temperature; Step (8), preparing a 0.25-4wt% solution of a mixture of chitosan and chitosan quaternary ammonium salt, and adjusting the pH to 5-7 with a 0.1M NaOH solution; Step (9), immersing the cellulose fabric obtained in step (7) into the mixture solution of chitosan and chitosan quaternary ammonium salt in step (8), shaking for 24 hours, washing with water for 3 times, and freeze-drying to obtain the fabric.

2. The method for improving the blood and water absorption and antibacterial properties of plant fiber fabrics according to claim 1, further characterized in that: The cellulose fabric in step (2) is made of plant fiber.

3. The method for improving the blood and water absorption and antibacterial properties of plant fiber fabrics according to claim 2, further characterized in that: The mass of the cellulose fabric weighed in step (2) is based on a mass ratio of cellulose fabric to sodium periodate of (1-4):

1.

4. The method for improving the blood and water absorption and antibacterial properties of plant fiber fabrics according to claim 1, further characterized in that: In step (5), the amount of dopamine hydrochloride is 0.25-5% of the mass of the cellulose fabric.

5. The method for improving the blood and water absorption and antibacterial properties of plant fiber fabrics according to claim 1, further characterized in that: In step (7), the sodium alginate is 0.5-10% of the mass of the cellulose fabric.

6. The method for improving the blood and water absorption and antibacterial properties of plant fiber fabrics according to claim 1, further characterized by: The 0.25-4wt% chitosan and chitosan quaternary ammonium salt mixture solution in step (8) is prepared by mixing chitosan and chitosan quaternary ammonium salt in a mass ratio of (5-10):

1.

7. The method for improving the blood and water absorption and antibacterial properties of plant fiber fabrics according to claim 1, further characterized by: In step (9), the total mass of chitosan and chitosan quaternary ammonium salt is 0.5-10% of the mass of the cellulose fabric.