Hydrophobic non-woven fabric and preparation method thereof

Abstract

The invention relates to the technical field of non-woven fabrics, in particular to a hydrophobic non-woven fabric and a preparation method thereof.The preparation method comprises the steps that perfluorodecanethiol and octavinyl polysilsesquioxane are used as raw materials to react to generate fluorine-containing polysilsesquioxane, then the fluorine-containing polysilsesquioxane is dispersed in an ethanol solution to form a hydrophobic modified solution, and the hydrophobic modified solution is added into the hydrophobic modified solution to prepare the hydrophobic non-woven fabric. Fluorine-containing polysilsesquioxane molecules in the hydrophobic modification solution not only have the organic-inorganic hybridization characteristic of polysilsesquioxane, but also contain hydrophobic groups of perfluorodecanethiol, so that the hydrophobic modification solution has excellent hydrophobic performance, the antibacterial non-woven fabric with the surface coated with silver-loaded chitosan is subjected to impregnation modification, and the antibacterial non-woven fabric with the surface coated with perfluorodecanethiol has excellent antibacterial performance. According to the present invention, with the silver-loaded chitosan, the fluorine-containing polysilsesquioxane molecules can be adsorbed and attached to the surface of the non-woven fabric to form the compact hydrophobic layer, the good antibacterial property of the non-woven fabric can be maintained due to the existence of the silver-loaded chitosan, and the chemical bond formed by the fluorine-containing polysilsesquioxane and the surface of the non-woven fabric is stable so as to achieve the good antibacterial property; the modified non-woven fabric keeps stable hydrophobic performance and antibacterial performance.

Description

Technical Field

[0001] The invention relates to the technical field of nonwoven fabrics, and in particular to a hydrophobic nonwoven fabric and a preparation method thereof. Background Art

[0002] In the field of textile materials, non-woven fabrics, as an important non-woven material, have attracted much attention due to their unique physical properties and wide application prospects. With the advancement of science and technology and changes in market demand, the performance requirements for non-woven fabrics are increasing. Although traditional non-woven fabrics have the advantages of moisture-proof, breathable, flexible, thin, flame-retardant, non-toxic and odorless, low price and recyclable, they are still insufficient in terms of hydrophobicity. Especially in some special application scenarios, such as medical, protection, packaging and other fields, there are higher requirements for the hydrophobicity of non-woven fabrics.

[0003] At present, the common hydrophobic non-woven fabrics on the market mainly achieve their hydrophobic properties through chemical treatment or physical modification. However, these methods often have problems such as poor stability of hydrophobic properties and poor environmental protection. After the non-woven fabrics are washed many times, their hydrophobicity will deteriorate. Therefore, how to improve the hydrophobic stability of non-woven fabrics on the basis of improving their hydrophobic properties has become a technical problem that needs to be urgently solved by technicians in this field. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a hydrophobic non-woven fabric and a preparation method thereof, which can effectively solve the problem of poor hydrophobic stability of the non-woven fabric in the prior art.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A method for preparing a hydrophobic nonwoven fabric, the method comprising the following steps:

[0009] Step 1, preparing a pretreatment etching solution using cellulase as a raw material, and then immersing the cotton non-woven fabric in the pretreatment etching solution for etching treatment;

[0010] Step 2, immersing the etched cotton non-woven fabric into a silver-loaded antibacterial coating solution to obtain an antibacterial non-woven fabric;

[0011] Step 3: Immerse the antibacterial non-woven fabric in a hydrophobic modification solution for hydrophobic modification treatment to obtain a hydrophobic non-woven fabric.

[0012] Furthermore, in step 1, the preparation method of the pretreatment etching solution is:

[0013] S2.1, citric acid solution and sodium citrate dihydrate solution were mixed in a volume ratio of 2:3, stirred at a stirring speed of 300 r / min for 10 min, and then citric acid solution or sodium citrate dihydrate solution was added dropwise to adjust the pH value to 5.5, and the result was recorded as a mixed solution;

[0014] S2.2. Add 3-5 g of cellulase to 1 L of the mixed solution, and stir at a stirring speed of 500 r / min for 10 min to obtain the pretreatment etching solution.

[0015] Furthermore, the concentration of the citric acid solution in S2.1 is 0.1 mol / L, and the concentration of the sodium citrate dihydrate solution in S2.1 is 0.1 mol / L.

[0016] Furthermore, in step 1, the specific method of etching is:

[0017] The cotton nonwoven fabric was immersed in the pretreatment etching solution, placed in a constant temperature water bath at 40°C for etching for 30 minutes, then ultrasonically cleaned with anhydrous ethanol and deionized water for 10 minutes each, and finally dried in an oven at 80°C for 30 minutes.

[0018] Furthermore, in step 2, the preparation method of the silver-loaded antibacterial coating solution is:

[0019] Weigh 2-3g of chitosan and disperse it in a 2% acetic acid solution. After magnetic stirring at a stirring speed of 500r / min for 24h, add 0.5-0.6g of silver nitrate and magnetically stir at a stirring speed of 300r / min for 30min in a light-proof condition to obtain a silver-loaded antibacterial coating solution.

[0020] Furthermore, in step 2, the preparation method of the antibacterial non-woven fabric is:

[0021] The etched cotton non-woven fabric was immersed in a silver-loaded antibacterial coating solution, and the silver-loaded antibacterial coating solution was magnetically stirred at a stirring speed of 200 r / min for 15 minutes, followed by ultrasonic dispersion at a frequency of 26 kHz for 30 minutes. The cotton non-woven fabric was taken out and dried at a temperature of 80°C for 30 minutes to obtain an antibacterial non-woven fabric.

[0022] Furthermore, in step 3, the preparation method of the hydrophobic modified solution is:

[0023] S7.1. Add 4 mL of perfluorodecanethiol and 1 g of octavinyl polysilsesquioxane to 15 mL of dichloromethane, disperse evenly, add 0.1 g of 2,2-dimethoxy-phenylacetophenone, and then place under a 250 W ultraviolet high-pressure mercury lamp for 10 min to react. After the reaction is completed, a white precipitate is obtained;

[0024] S7.2, washing the white precipitate by centrifugation three times with ethanol solution, and then drying it in an oven at 80°C for 30 min. The obtained product is recorded as the modified product;

[0025] S7.3. Disperse 18-20 g of the modified product in an ethanol solution, and the resultant after ultrasonic dispersion is a hydrophobic modified solution.

[0026] Furthermore, in S7.1, the specific operation for uniform dispersion is stirring at a stirring speed of 500 r / min for 10 min, the mass fraction of the ethanol solution in S7.2 is 60%, the centrifugal speed and centrifugal time for centrifugal washing in S7.2 are 5000 r / min and 3 min respectively, the mass fraction of the ethanol solution in S7.3 is 80%, and the specific operation of ultrasonic dispersion in S7.3 is ultrasonic dispersion at a frequency of 28 kHz for 30 min.

[0027] Furthermore, in step 3, the specific method of the hydrophobic modification treatment is:

[0028] The antibacterial non-woven fabric is immersed in the hydrophobic modification solution, taken out after soaking for 2-3 hours, rinsed with anhydrous ethanol for 3 times, and dried in an oven at 45°C for 2-3 hours to obtain a hydrophobic non-woven fabric.

[0029] A hydrophobic nonwoven fabric is prepared by a method for preparing the hydrophobic nonwoven fabric.

[0030] Beneficial Effects

[0031] The present invention provides a hydrophobic nonwoven fabric and a preparation method thereof. Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention first etches the pure cotton non-woven fabric by cellulase, and then performs antibacterial modification on it by silver-loaded chitosan, so that the prepared non-woven fabric has stable antibacterial properties; cellulase can remove the hairiness and short thorns on the surface of the pure cotton non-woven fabric, making its surface smoother and flatter, which not only improves the appearance texture of the fabric, but also improves its touch and comfort. The etching effect makes the fabric surface more delicate, enhances the glossiness and wrinkle resistance, and improves the overall quality of the fabric. Moreover, under the premise of not damaging the internal structure of the fabric, the cellulase treatment can increase the strength of the fabric and make it more durable; secondly, cellulase can hydrolyze part of the cellulose on the surface of the cotton fiber, thereby generating a rough structure on the fiber surface. This rough structure provides a good substrate for subsequent antibacterial modification and hydrophobic modification, which is beneficial to the attachment and fixation of antibacterial molecules and hydrophobic molecules on the fiber surface.

[0033] 2. The present invention immerses the etched cotton non-woven fabric into a silver-loaded antibacterial coating solution, so that the prepared antibacterial non-woven fabric has stable antibacterial properties. Chitosan, as a natural polymer material, has excellent biocompatibility and biodegradability, and also has certain antibacterial properties. Its antibacterial ability can be significantly enhanced through silver-loaded treatment. The broad-spectrum antibacterial property of nanosilver enables the composite antibacterial agent to effectively inhibit the growth of various bacteria and fungi. The combination of chitosan and nanosilver not only improves the antibacterial effect, but also reduces the potential cytotoxicity of nanosilver, making it safer. In addition, the composite antibacterial agent has long-lasting antibacterial properties and can maintain the antibacterial effect of the fabric for a long time. Cellulase and chitosan are both natural or biological materials. Their application reduces the use of chemical agents and reduces pollution to the environment. This green and environmentally friendly processing method meets the requirements of sustainable development.

[0034] 3. The present invention uses perfluorodecanethiol and octavinyl polysilsesquioxane as raw materials to react to generate fluorinated polysilsesquioxane, which is then dispersed in an ethanol solution to form a hydrophobic modified solution. The fluorinated polysilsesquioxane molecules in the hydrophobic modified solution have both the organic-inorganic hybrid characteristics of polysilsesquioxane and the hydrophobic groups of perfluorodecanethiol, so they have excellent hydrophobic properties. The antibacterial non-woven fabric coated with silver-loaded chitosan is impregnated and modified, and the fluorinated polysilsesquioxane molecules can be adsorbed and attached to the surface of the non-woven fabric to form a dense hydrophobic layer. At the same time, due to the presence of silver-loaded chitosan, the non-woven fabric also maintains good antibacterial properties. Moreover, the chemical bond formed between the fluorinated polysilsesquioxane and the surface of the non-woven fabric is relatively stable and not easy to fall off or fail. Therefore, the modified non-woven fabric can maintain stable hydrophobic properties and antibacterial properties during long-term use. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. 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.

[0036] The present invention will be further described below in conjunction with the embodiments.

[0037] Example 1

[0038] A method for preparing a hydrophobic nonwoven fabric according to the present embodiment comprises the following steps:

[0039] Step 1, preparing a pretreatment etching solution using cellulase as a raw material, and then immersing the cotton non-woven fabric in the pretreatment etching solution for etching treatment;

[0040] Wherein, the preparation method of the pretreatment etching solution is:

[0041] S2.1. Mix a 0.1 mol / L citric acid solution and a 0.1 mol / L sodium citrate dihydrate solution in a volume ratio of 2:3, stir at a stirring speed of 300 r / min for 10 min, and then continue to dropwise add a 0.1 mol / L citric acid solution or a 0.1 mol / L sodium citrate dihydrate solution to adjust the pH value to 5.5. The result is recorded as a mixed solution;

[0042] S2.2. Add 3 g of cellulase to 1 L of the mixed solution, and stir at a stirring speed of 500 r / min for 10 min to obtain the pretreatment etching solution.

[0043] The specific method of etching treatment is:

[0044] The cotton nonwoven fabric was immersed in the pretreatment etching solution, placed in a constant temperature water bath at 40°C for etching for 30 minutes, then ultrasonically cleaned with anhydrous ethanol and deionized water for 10 minutes each, and finally dried in an oven at 80°C for 30 minutes.

[0045] Step 2, immersing the etched cotton non-woven fabric into a silver-loaded antibacterial coating solution to obtain an antibacterial non-woven fabric;

[0046] Wherein, the preparation method of the silver-loaded antibacterial coating solution is:

[0047] Weigh 2 g of chitosan and disperse it in a 2% acetic acid solution. After magnetic stirring at a stirring speed of 500 r / min for 24 hours, add 0.5 g of silver nitrate and magnetically stir at a stirring speed of 300 r / min for 30 minutes in a light-proof condition to obtain a silver-loaded antibacterial coating solution.

[0048] The preparation method of the antibacterial non-woven fabric is:

[0049] The etched cotton non-woven fabric was immersed in a silver-loaded antibacterial coating solution, and the silver-loaded antibacterial coating solution was magnetically stirred at a stirring speed of 200 r / min for 15 minutes, followed by ultrasonic dispersion at a frequency of 26 kHz for 30 minutes. The cotton non-woven fabric was taken out and dried at a temperature of 80°C for 30 minutes to obtain an antibacterial non-woven fabric.

[0050] Step 3: Immerse the antibacterial non-woven fabric in a hydrophobic modification solution for hydrophobic modification treatment to obtain a hydrophobic non-woven fabric.

[0051] Wherein, the preparation method of the hydrophobic modified solution is:

[0052] S7.1, add 4 mL of perfluorodecanethiol and 1 g of octavinyl polysilsesquioxane to 15 mL of dichloromethane, stir at a stirring speed of 500 r / min for 10 min, then add 0.1 g of 2,2-dimethoxy-phenylacetophenone, and then place under a 250 W ultraviolet high-pressure mercury lamp for 10 min to react, and a white precipitate is obtained after the reaction is completed;

[0053] S7.2, the white precipitate was centrifuged and washed three times with 60% ethanol solution, the centrifugal speed and time were 5000 r / min and 3 min respectively, and then dried in an oven at 80°C for 30 min. The obtained product was recorded as the modified product;

[0054] S7.3. Disperse 18 g of the modified product in an ethanol solution with a mass fraction of 80%, and disperse it ultrasonically at a frequency of 28 kHz for 30 minutes to obtain a hydrophobic modified solution.

[0055] The specific method of hydrophobic modification treatment is:

[0056] The antibacterial non-woven fabric was immersed in the hydrophobic modification solution, taken out after soaking for 2 hours, rinsed with anhydrous ethanol for 3 times, and dried in an oven at 45°C for 2 hours to obtain a hydrophobic non-woven fabric.

[0057] A hydrophobic nonwoven fabric is prepared by a method for preparing the hydrophobic nonwoven fabric.

[0058] Example 2

[0059] A method for preparing a hydrophobic nonwoven fabric according to the present embodiment comprises the following steps:

[0060] Step 1, preparing a pretreatment etching solution using cellulase as a raw material, and then immersing the cotton non-woven fabric in the pretreatment etching solution for etching treatment;

[0061] Wherein, the preparation method of the pretreatment etching solution is:

[0062] S2.1. Mix a 0.1 mol / L citric acid solution and a 0.1 mol / L sodium citrate dihydrate solution in a volume ratio of 2:3, stir at a stirring speed of 300 r / min for 10 min, and then continue to dropwise add a 0.1 mol / L citric acid solution or a 0.1 mol / L sodium citrate dihydrate solution to adjust the pH value to 5.5. The result is recorded as a mixed solution;

[0063] S2.2. Add 5 g of cellulase to 1 L of the mixed solution, and stir at a stirring speed of 500 r / min for 10 min to obtain the pretreatment etching solution.

[0064] The specific method of etching treatment is:

[0065] The cotton nonwoven fabric was immersed in the pretreatment etching solution, placed in a constant temperature water bath at 40°C for etching for 30 minutes, then ultrasonically cleaned with anhydrous ethanol and deionized water for 10 minutes each, and finally dried in an oven at 80°C for 30 minutes.

[0066] Step 2, immersing the etched cotton non-woven fabric into a silver-loaded antibacterial coating solution to obtain an antibacterial non-woven fabric;

[0067] Wherein, the preparation method of the silver-loaded antibacterial coating solution is:

[0068] Weigh 3 g of chitosan and disperse it in a 2% acetic acid solution. After magnetic stirring at a stirring speed of 500 r / min for 24 hours, add 0.6 g of silver nitrate and magnetically stir at a stirring speed of 300 r / min for 30 minutes in a light-proof condition to obtain a silver-loaded antibacterial coating solution.

[0069] The preparation method of the antibacterial non-woven fabric is:

[0070] The etched cotton non-woven fabric was immersed in a silver-loaded antibacterial coating solution, and the silver-loaded antibacterial coating solution was magnetically stirred at a stirring speed of 200 r / min for 15 minutes, followed by ultrasonic dispersion at a frequency of 26 kHz for 30 minutes. The cotton non-woven fabric was taken out and dried at a temperature of 80°C for 30 minutes to obtain an antibacterial non-woven fabric.

[0071] Step 3: Immerse the antibacterial non-woven fabric in a hydrophobic modification solution for hydrophobic modification treatment to obtain a hydrophobic non-woven fabric.

[0072] Wherein, the preparation method of the hydrophobic modified solution is:

[0073] S7.1, add 4 mL of perfluorodecanethiol and 1 g of octavinyl polysilsesquioxane to 15 mL of dichloromethane, stir at a stirring speed of 500 r / min for 10 min, then add 0.1 g of 2,2-dimethoxy-phenylacetophenone, and then place under a 250 W ultraviolet high-pressure mercury lamp for 10 min to react, and a white precipitate is obtained after the reaction is completed;

[0074] S7.2, the white precipitate was centrifuged and washed three times with 60% ethanol solution, the centrifugal speed and time were 5000 r / min and 3 min respectively, and then dried in an oven at 80°C for 30 min. The obtained product was recorded as the modified product;

[0075] S7.3. Disperse 20 g of the modified product in an ethanol solution with a mass fraction of 80%, and disperse it ultrasonically at a frequency of 28 kHz for 30 minutes to obtain a hydrophobic modified solution.

[0076] The specific method of hydrophobic modification treatment is:

[0077] The antibacterial non-woven fabric was immersed in the hydrophobic modification solution, taken out after soaking for 3 hours, rinsed with anhydrous ethanol for 3 times, and dried in an oven at 45°C for 3 hours to obtain a hydrophobic non-woven fabric.

[0078] A hydrophobic nonwoven fabric is prepared by a method for preparing the hydrophobic nonwoven fabric.

[0079] Example 3

[0080] A method for preparing a hydrophobic nonwoven fabric according to the present embodiment comprises the following steps:

[0081] Step 1, preparing a pretreatment etching solution using cellulase as a raw material, and then immersing the cotton non-woven fabric in the pretreatment etching solution for etching treatment;

[0082] Wherein, the preparation method of the pretreatment etching solution is:

[0083] S2.1. Mix a 0.1 mol / L citric acid solution and a 0.1 mol / L sodium citrate dihydrate solution in a volume ratio of 2:3, stir at a stirring speed of 300 r / min for 10 min, and then continue to dropwise add a 0.1 mol / L citric acid solution or a 0.1 mol / L sodium citrate dihydrate solution to adjust the pH value to 5.5. The result is recorded as a mixed solution;

[0084] S2.2. Add 4 g of cellulase to 1 L of the mixed solution, and stir at a stirring speed of 500 r / min for 10 min to obtain the pretreatment etching solution.

[0085] The specific method of etching treatment is:

[0086] The cotton nonwoven fabric was immersed in the pretreatment etching solution, placed in a constant temperature water bath at 40°C for etching for 30 minutes, then ultrasonically cleaned with anhydrous ethanol and deionized water for 10 minutes each, and finally dried in an oven at 80°C for 30 minutes.

[0087] Step 2, immersing the etched cotton non-woven fabric into a silver-loaded antibacterial coating solution to obtain an antibacterial non-woven fabric;

[0088] Wherein, the preparation method of the silver-loaded antibacterial coating solution is:

[0089] Weigh 3 g of chitosan and disperse it in a 2% acetic acid solution. After magnetic stirring at a stirring speed of 500 r / min for 24 hours, add 0.5 g of silver nitrate and magnetically stir at a stirring speed of 300 r / min for 30 minutes in a light-proof condition to obtain a silver-loaded antibacterial coating solution.

[0090] The preparation method of the antibacterial non-woven fabric is:

[0091] The etched cotton non-woven fabric was immersed in a silver-loaded antibacterial coating solution, and the silver-loaded antibacterial coating solution was magnetically stirred at a stirring speed of 200 r / min for 15 minutes, followed by ultrasonic dispersion at a frequency of 26 kHz for 30 minutes. The cotton non-woven fabric was taken out and dried at a temperature of 80°C for 30 minutes to obtain an antibacterial non-woven fabric.

[0092] Step 3: Immerse the antibacterial non-woven fabric in a hydrophobic modification solution for hydrophobic modification treatment to obtain a hydrophobic non-woven fabric.

[0093] Wherein, the preparation method of the hydrophobic modified solution is:

[0094] S7.1, add 4 mL of perfluorodecanethiol and 1 g of octavinyl polysilsesquioxane to 15 mL of dichloromethane, stir at a stirring speed of 500 r / min for 10 min, then add 0.1 g of 2,2-dimethoxy-phenylacetophenone, and then place under a 250 W ultraviolet high-pressure mercury lamp for 10 min to react, and a white precipitate is obtained after the reaction is completed;

[0095] S7.2, the white precipitate was centrifuged and washed three times with 60% ethanol solution, the centrifugal speed and time were 5000 r / min and 3 min respectively, and then dried in an oven at 80°C for 30 min. The obtained product was recorded as the modified product;

[0096] S7.3. Disperse 19 g of the modified product in an ethanol solution with a mass fraction of 80%, and disperse it ultrasonically at a frequency of 28 kHz for 30 minutes to obtain a hydrophobic modified solution.

[0097] The specific method of hydrophobic modification treatment is:

[0098] The antibacterial non-woven fabric was immersed in the hydrophobic modification solution, taken out after soaking for 3 hours, rinsed with anhydrous ethanol for 3 times, and dried in an oven at 45°C for 2 hours to obtain a hydrophobic non-woven fabric.

[0099] A hydrophobic nonwoven fabric is prepared by a method for preparing the hydrophobic nonwoven fabric.

[0100] Comparative Example 1

[0101] The hydrophobic non-woven fabric and the preparation method thereof provided in this comparative example are substantially the same as those in Example 1, with the main difference being that the pretreatment etching solution in Example 1 is replaced with deionized water in this comparative example 1.

[0102] Comparative Example 2

[0103] The hydrophobic non-woven fabric and the preparation method thereof provided in this comparative example are substantially the same as those in Example 1, with the main difference being that in this comparative example 2, the silver-loaded antibacterial coating solution in Example 1 is replaced with a silver nitrate solution having a concentration of 0.01 mol / L.

[0104] Comparative Example 3

[0105] The hydrophobic non-woven fabric and its preparation method provided in this comparative example are roughly the same as those in Example 1, with the main difference being that in this comparative example 3, the hydrophobic modified solution in Example 1 is replaced with a 5% by volume hexadecyltrimethoxysilane solution, wherein the preparation method of the hexadecyltrimethoxysilane solution is as follows: 45 mL of anhydrous ethanol, 2.5 mL of a 2.5% by mass hydrochloric acid solution and 2.5 mL of hexadecyltrimethoxysilane are mixed to obtain the obtained product.

[0106] Performance Testing

[0107] The hydrophobic nonwoven fabrics prepared in Examples 1-3 and Comparative Examples 1-3 are marked as Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2 and Comparative Example 3, respectively. Then, the performance of Examples 1-3 and Comparative Examples 1-3 is tested. The specific testing method is as follows:

[0108] 1. The antibacterial rates of Examples 1-3 and Comparative Examples 1-3 were determined with reference to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles (Part 3): Oscillation method". The antibacterial rates were calculated according to the following formula:

[0109] Antibacterial rate (%) = (A0-A1) / A0×100%

[0110] Where: A0 represents the colony count of the blank control sample after 24 hours of culture,

[0111] A1 represents the number of colonies after 24 hours of culture of the antibacterial finishing sample.

[0112] The colonies were cultured in a DH3600 constant temperature incubator, and the data obtained are recorded in the following table;

[0113] 2. The water contact angles of Examples 1-3 and Comparative Examples 1-3 were measured using a JGW-360 fully automatic optical contact angle meter. Then, Examples 1-3 and Comparative Examples 1-3 were rinsed 100 times and 200 times respectively with pure water, and the water contact angles of Examples 1-3 and Comparative Examples 1-3 after rinsing were measured. The obtained data are recorded in the following table;

[0114]

[0115] It can be seen from the data in the above table that the hydrophobic non-woven fabrics in Examples 1-3 have significantly better antibacterial properties than those in Comparative Examples 1-2, indicating that etching the entire non-woven fabric and then performing antibacterial modification can improve the antibacterial properties of the non-woven fabric, and the silver-loaded antibacterial coating solution can have a better antibacterial property than the silver nitrate solution; secondly, the hydrophobic non-woven fabrics in Examples 1-3 have a larger water contact angle than that in Comparative Example 3, indicating that adsorbing the hydrophobic modification solution on the surface of the non-woven fabric can make the prepared non-woven fabric have a better hydrophobic property.

[0116] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0117] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a hydrophobic nonwoven fabric, characterized in that: The preparation method comprises the following steps: Step 1, preparing a pretreatment etching solution using cellulase as a raw material, and then immersing the cotton non-woven fabric in the pretreatment etching solution for etching treatment; Step 2, immersing the etched cotton non-woven fabric into a silver-loaded antibacterial coating solution to obtain an antibacterial non-woven fabric; Step 3: Immerse the antibacterial non-woven fabric in a hydrophobic modification solution for hydrophobic modification treatment to obtain a hydrophobic non-woven fabric.

2. The method for preparing a hydrophobic nonwoven fabric according to claim 1, characterized in that: In step 1, the preparation method of the pretreatment etching solution is: S2.1, citric acid solution and sodium citrate dihydrate solution were mixed in a volume ratio of 2:3, stirred at a stirring speed of 300 r / min for 10 min, and then citric acid solution or sodium citrate dihydrate solution was added dropwise to adjust the pH value to 5.5, and the result was recorded as a mixed solution; S2.

2. Add 3-5 g of cellulase to 1 L of the mixed solution, and stir at a stirring speed of 500 r / min for 10 min to obtain the pretreatment etching solution.

3. The method for preparing a hydrophobic nonwoven fabric according to claim 2, characterized in that: The concentration of the citric acid solution in S2.1 is 0.1 mol / L, and the concentration of the sodium citrate dihydrate solution in S2.1 is 0.1 mol / L.

4. The method for preparing a hydrophobic nonwoven fabric according to claim 1, characterized in that: In step 1, the specific method of etching treatment is: The cotton nonwoven fabric was immersed in the pretreatment etching solution, placed in a constant temperature water bath at 40°C for etching for 30 minutes, then ultrasonically cleaned with anhydrous ethanol and deionized water for 10 minutes each, and finally dried in an oven at 80°C for 30 minutes.

5. The method for preparing a hydrophobic nonwoven fabric according to claim 1, characterized in that: In step 2, the preparation method of the silver-loaded antibacterial coating solution is: Weigh 2-3g of chitosan and disperse it in a 2% acetic acid solution. After magnetic stirring at a stirring speed of 500r / min for 24h, add 0.5-0.6g of silver nitrate and magnetically stir at a stirring speed of 300r / min for 30min in a light-proof condition to obtain a silver-loaded antibacterial coating solution.

6. The method for preparing a hydrophobic nonwoven fabric according to claim 1, characterized in that: In step 2, the preparation method of the antibacterial non-woven fabric is: The etched cotton non-woven fabric was immersed in a silver-loaded antibacterial coating solution, and the silver-loaded antibacterial coating solution was magnetically stirred at a stirring speed of 200 r / min for 15 minutes, followed by ultrasonic dispersion at a frequency of 26 kHz for 30 minutes. The cotton non-woven fabric was taken out and dried at a temperature of 80°C for 30 minutes to obtain an antibacterial non-woven fabric.

7. The method for preparing a hydrophobic nonwoven fabric according to claim 1, characterized in that: In step 3, the preparation method of the hydrophobic modification solution is: S7.

1. Add 4 mL of perfluorodecanethiol and 1 g of octavinyl polysilsesquioxane to 15 mL of dichloromethane, disperse evenly, add 0.1 g of 2,2-dimethoxy-phenylacetophenone, and then place under a 250 W ultraviolet high-pressure mercury lamp for 10 min to react. After the reaction is completed, a white precipitate is obtained; S7.2, washing the white precipitate by centrifugation three times with ethanol solution, and then drying it in an oven at 80°C for 30 min. The obtained product is recorded as the modified product; S7.

3. Disperse 18-20 g of the modified product in an ethanol solution, and the resultant after ultrasonic dispersion is a hydrophobic modified solution.

8. The method for preparing a hydrophobic nonwoven fabric according to claim 7, characterized in that: In S7.1, the specific operation for uniform dispersion is stirring at a stirring speed of 500 r / min for 10 min, the mass fraction of the ethanol solution in S7.2 is 60%, the centrifugal speed and centrifugal time for centrifugal washing in S7.2 are 5000 r / min and 3 min respectively, the mass fraction of the ethanol solution in S7.3 is 80%, and the specific operation of ultrasonic dispersion in S7.3 is ultrasonic dispersion at a frequency of 28 kHz for 30 min.

9. The method for preparing a hydrophobic nonwoven fabric according to claim 1, characterized in that: In step 3, the specific method of hydrophobic modification treatment is: The antibacterial non-woven fabric is immersed in the hydrophobic modification solution, taken out after soaking for 2-3 hours, rinsed with anhydrous ethanol for 3 times, and dried in an oven at 45°C for 2-3 hours to obtain a hydrophobic non-woven fabric.

10. A hydrophobic nonwoven fabric, characterized in that: The hydrophobic nonwoven fabric is prepared by the method for preparing the hydrophobic nonwoven fabric according to claim 1.

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