阅读说明：本技术 一种抗菌聚丙烯无纺布及其制备方法 (Antibacterial polypropylene non-woven fabric and preparation method thereof ) 是由 史斌 姚启明 史清友 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种抗菌聚丙烯无纺布,所述聚丙烯无纺布表面依次粘附有改性电气石层、季铵盐化壳聚糖层。本发明还公开了上述抗菌聚丙烯无纺布的制备方法,包括如下步骤：S1、在聚丙烯无纺布表面涂覆二苯甲酮溶液,紫外光照射,洗涤得到布料A；S2、将布料A浸泡在改性电气石分散液中,然后紫外光照射,取出洗涤,干燥得到布料B；S3、在季铵盐化壳聚糖水溶液中浸泡布料B,震荡反应,然后取出洗涤,干燥得到抗菌聚丙烯无纺布。本发明具有良好的抗菌性能。(The invention discloses an antibacterial polypropylene non-woven fabric, wherein a modified tourmaline layer and a quaternary ammonium salinization shell polysaccharide layer are sequentially adhered to the surface of the polypropylene non-woven fabric. The invention also discloses a preparation method of the antibacterial polypropylene non-woven fabric, which comprises the following steps: s1, coating a benzophenone solution on the surface of the polypropylene non-woven fabric, irradiating by ultraviolet light, and washing to obtain a fabric A; s2, soaking the cloth A in the modified tourmaline dispersion liquid, irradiating by ultraviolet light, taking out, washing and drying to obtain a cloth B; and S3, soaking the cloth B in a quaternary ammonium salinized chitosan aqueous solution, carrying out oscillation reaction, taking out, washing and drying to obtain the antibacterial polypropylene non-woven fabric. The invention has good antibacterial performance.)

1. The antibacterial polypropylene non-woven fabric is characterized in that a modified tourmaline layer and a quaternary ammonium salinization shell polysaccharide layer are sequentially adhered to the surface of the polypropylene non-woven fabric.

2. The antibacterial polypropylene nonwoven fabric according to claim 1, wherein the modified tourmaline is methacrylic anhydride modified tourmaline.

3. A method for preparing the antibacterial polypropylene nonwoven fabric as claimed in claim 1 or 2, which comprises the following steps:

s1, coating a benzophenone solution on the surface of the polypropylene non-woven fabric, irradiating by ultraviolet light, and washing to obtain a fabric A;

s2, soaking the cloth A in the modified tourmaline dispersion liquid, irradiating by ultraviolet light, taking out, washing and drying to obtain a cloth B;

and S3, soaking the cloth B in a quaternary ammonium salinized chitosan aqueous solution, carrying out oscillation reaction, taking out, washing and drying to obtain the antibacterial polypropylene non-woven fabric.

4. The method for preparing the antibacterial polypropylene nonwoven fabric according to claim 3, wherein in S1, the ultraviolet light is irradiated for 10-20S.

5. The method for preparing the antibacterial polypropylene nonwoven fabric according to claim 3 or 4, wherein the concentration of the benzophenone solution in S1 is 15 to 20 mmol/L.

6. The method for preparing an antibacterial polypropylene nonwoven fabric according to any one of claims 3 to 5, wherein in S1, the solvent of the benzophenone solution is n-heptane.

7. The method for preparing the antibacterial polypropylene nonwoven fabric according to any one of claims 3 to 6, wherein in S2, the soaking time is 20-30 min; preferably, in S2, the ultraviolet light is irradiated for 4-8 min.

8. The method for preparing the antibacterial polypropylene nonwoven fabric according to any one of claims 3 to 7, wherein in S2, the mass fraction of the modified tourmaline dispersion is 2 to 4 wt%; preferably, in S2, the solvent of the modified tourmaline dispersion liquid is water.

9. The method for preparing the antibacterial polypropylene non-woven fabric according to any one of claims 3 to 8, wherein the reaction is performed at room temperature for 15 to 18 hours with shaking.

10. The method for preparing an antibacterial polypropylene nonwoven fabric according to any one of claims 3 to 9, wherein the concentration of the aqueous solution of the quaternized chitosan is 0.5 to 1 g/ml.

Technical Field

The invention relates to the technical field of non-woven fabrics, in particular to an antibacterial polypropylene non-woven fabric and a preparation method thereof.

Background

Polypropylene, PP for short, is a colorless, odorless, nontoxic and semitransparent solid substance. The polypropylene has chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, good high-wear-resistance processing property and the like, so that the polypropylene can be rapidly and widely developed and applied in a plurality of fields such as machinery, automobiles, electronic and electric appliances, buildings, textiles, packaging, agriculture, forestry, fishery, food industry and the like since the coming out.

The polypropylene non-woven fabric can be made into a packaging bag, is attractive and elegant, can be used repeatedly, and can also be reused after being washed. The polypropylene non-woven fabric is usually reinforced by processes such as spunlace and needling in the preparation process, gravure is left on the surface of the polypropylene non-woven fabric, bacteria are easy to gather, and therefore the antibacterial performance of the polypropylene non-woven fabric needs to be improved.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides an antibacterial polypropylene non-woven fabric and a preparation method thereof, and the antibacterial polypropylene non-woven fabric has good antibacterial performance.

The invention provides an antibacterial polypropylene non-woven fabric, wherein a modified tourmaline layer and a quaternary ammonium salinization shell polysaccharide layer are sequentially adhered to the surface of the polypropylene non-woven fabric.

Preferably, the modified tourmaline is methacrylic anhydride modified tourmaline.

The methacrylic anhydride modified tourmaline can be prepared according to the conventional method in the field.

The invention also discloses a preparation method of the antibacterial polypropylene non-woven fabric, which comprises the following steps:

s1, coating a benzophenone solution on the surface of the polypropylene non-woven fabric, irradiating by ultraviolet light, and washing to obtain a fabric A;

s2, soaking the cloth A in the modified tourmaline dispersion liquid, irradiating by ultraviolet light, taking out, washing and drying to obtain a cloth B;

and S3, soaking the cloth B in a quaternary ammonium salinized chitosan aqueous solution, carrying out oscillation reaction, taking out, washing and drying to obtain the antibacterial polypropylene non-woven fabric.

Preferably, in S1, the ultraviolet light is irradiated for 10-20S.

Preferably, in S1, the concentration of the benzophenone solution is 15-20 mmol/L.

Preferably, in S1, the solvent of the benzophenone solution is n-heptane.

Preferably, in S2, the soaking time is 20-30 min.

Preferably, in S2, the ultraviolet light is irradiated for 4-8 min.

Preferably, in S2, the modified tourmaline dispersion liquid has a mass fraction of 2 to 4 wt%.

Preferably, in S2, the solvent of the modified tourmaline dispersion liquid is water.

Preferably, the reaction is shaken at room temperature for 15-18 h.

Preferably, the aqueous quaternized chitosan solution has a concentration of 0.5 to 1 g/ml.

The quaternary ammonium salinization chitosan can be graft modified chitosan such as 3-chlorine-2-hydroxypropyl trimethyl ammonium chloride, 2, 3-epoxypropyl trimethyl ammonium chloride, etc.; the chitosan quaternary ammonium salt can be obtained from the market, and can also be prepared according to the conventional method in the field.

The coating amount of the benzophenone solution is not specified, and the polypropylene non-woven fabric can be uniformly coated and soaked.

Has the advantages that:

the method comprises the steps of coating a photoinitiator benzophenone solution on the surface of a polypropylene non-woven fabric, then carrying out ultraviolet irradiation for a short time to graft benzophenone on the surface of polypropylene, then soaking in tourmaline grafted with carbon-carbon double bonds, carrying out ultraviolet irradiation to carry out unsaturated double bond copolymerization, thereby grafting tourmaline on the surface of the polypropylene non-woven fabric, wherein the tourmaline has electronegativity, then soaking in a quaternary ammonium salinized chitosan aqueous solution, and obtaining a quaternary ammonium salinized chitosan layer by self-loading on the surface of the tourmaline layer through electrostatic adsorption, wherein the tourmaline and the quaternary ammonium salinized chitosan are matched with each other, so that the antibacterial performance of the polypropylene non-woven fabric can be greatly improved.

Detailed Description

The technical solution of the present invention will be described in detail below with reference to specific examples.

The quaternized chitosan used in examples 1-3 was 3-chloro-2-hydroxypropyltrimethylammonium chloride graft-modified chitosan.

Example 1

The surface of the polypropylene non-woven fabric is sequentially adhered with a modified tourmaline layer and a quaternary ammonium salinization shell polysaccharide layer;

wherein, in the preparation process of the modified tourmaline, 5g of 2000-mesh tourmaline is added into 500ml of N, N-dimethylformamide, the ultrasonic dispersion is uniform, the temperature is raised to 40 ℃, 4ml of methacrylic anhydride is dripped, the heat preservation and the stirring are carried out for 2h, the filtration is carried out, the filter cake is washed by ethanol, and the modified tourmaline is obtained by drying.

The preparation method of the antibacterial polypropylene non-woven fabric comprises the following steps:

s1, taking the size of 10 x 10cm and the gram weight of 60g/m²The polypropylene non-woven fabric is cleaned by ethanol and water for 20min in an ultrasonic mode in sequence, after drying, 10ml of n-heptane solution with the concentration of 15mmol/L benzophenone is coated on the surface of the polypropylene non-woven fabric, standing and soaking are carried out for 1min, ultraviolet light is used for irradiating for 20s, n-heptane is used for washing for 1 time, and then ethanol and water are used for washing for 3 times in sequence to obtain cloth A;

s2, soaking the cloth A in a modified tourmaline water dispersion liquid with the mass fraction of 2 wt%, shaking and soaking for 30min, irradiating for 4min by using ultraviolet light, taking out, washing with water, and drying at 60 ℃ to obtain a cloth B;

s3, soaking the cloth B in a quaternary ammonium salinized chitosan aqueous solution with the concentration of 1g/ml, oscillating and reacting for 15 hours at room temperature, taking out, washing with water, and drying at 60 ℃ to obtain the antibacterial polypropylene non-woven fabric.

Example 2

The surface of the polypropylene non-woven fabric is sequentially adhered with a modified tourmaline layer and a quaternary ammonium salinization shell polysaccharide layer;

wherein, in the preparation process of the modified tourmaline, 5g of 2000-mesh tourmaline is added into 500ml of N, N-dimethylformamide, the ultrasonic dispersion is uniform, the temperature is raised to 40 ℃, 4ml of methacrylic anhydride is dripped, the heat preservation and the stirring are carried out for 2h, the filtration is carried out, the filter cake is washed by ethanol, and the modified tourmaline is obtained by drying.

The preparation method of the antibacterial polypropylene non-woven fabric comprises the following steps:

s1, taking the size of 10 x 10cm and the gram weight of 60g/m²The polypropylene non-woven fabric is sequentially cleaned by ethanol and water for 20min in an ultrasonic way, after being dried, 10ml of n-heptane solution with the concentration of 20mmol/L benzophenone is coated on the surface of the polypropylene non-woven fabric, the polypropylene non-woven fabric is kept stand and soaked for 1min, is irradiated by ultraviolet light for 10s and is treated by n-heptane solutionWashing with heptane for 1 time, and then washing with ethanol and water sequentially for 3 times to obtain cloth A;

s2, soaking the cloth A in a modified tourmaline water dispersion solution with the mass fraction of 4 wt%, shaking and soaking for 20min, irradiating with ultraviolet light for 8min, taking out, washing with water, and drying at 60 ℃ to obtain a cloth B;

s3, soaking the cloth B in 0.5g/ml quaternary ammonium salinized chitosan aqueous solution, oscillating and reacting at room temperature for 18h, taking out, washing with water, and drying at 60 ℃ to obtain the antibacterial polypropylene non-woven fabric.

Example 3

The surface of the polypropylene non-woven fabric is sequentially adhered with a modified tourmaline layer and a quaternary ammonium salinization shell polysaccharide layer;

wherein, in the preparation process of the modified tourmaline, 5g of 2000-mesh tourmaline is added into 500ml of N, N-dimethylformamide, the ultrasonic dispersion is uniform, the temperature is raised to 40 ℃, 4ml of methacrylic anhydride is dripped, the heat preservation and the stirring are carried out for 2h, the filtration is carried out, the filter cake is washed by ethanol, and the modified tourmaline is obtained by drying.

The preparation method of the antibacterial polypropylene non-woven fabric comprises the following steps:

s1, taking the size of 10 x 10cm and the gram weight of 60g/m²The polypropylene non-woven fabric is cleaned by ethanol and water for 20min in an ultrasonic mode in sequence, after drying, 10ml of n-heptane solution with 17mmol/L benzophenone is coated on the surface of the polypropylene non-woven fabric, standing and soaking are carried out for 1min, ultraviolet light is used for irradiating for 15s, n-heptane is used for washing for 1 time, and then ethanol and water are used for washing for 3 times in sequence to obtain cloth A;

s2, soaking the cloth A in a modified tourmaline water dispersion solution with the mass fraction of 3 wt%, shaking and soaking for 25min, irradiating for 6min by using ultraviolet light, taking out, washing with water, and drying at 60 ℃ to obtain a cloth B;

s3, soaking the cloth B in 0.7g/ml quaternary ammonium salinized chitosan aqueous solution, oscillating and reacting for 17 hours at room temperature, taking out, washing with water, and drying at 60 ℃ to obtain the antibacterial polypropylene non-woven fabric.

Experiment of

Reference national standard GB/T20944 textile antibacterialEvaluation method of properties the antibacterial properties of examples 1 to 3 were tested. The testing process comprises the following steps: firstly, carrying out constant-temperature oscillation (37 ℃ and 150r/min) on gram-negative bacteria escherichia coli or gram-positive bacteria staphylococcus aureus in sterile nutrient broth for activation for 24 h; the bacterial solution was diluted to 1.0X 10 with sterile nutrient broth and 0.03mol/L Phosphate Buffered Saline (PBS)⁵CFU/mL; then 10mL of the solution with a concentration of 1.0X 10⁵Placing CFU/mL bacterial solution and a non-woven fabric into a sterilized 50mL triangular flask, oscillating at constant temperature of 37 ℃ and 150r/min, taking 0.14mL bacterial solution at regular intervals, diluting to 7mL by using 0.03mol/L PBS solution, uniformly mixing, transferring 0.1mL bacterial solution, coating the bacterial solution on a sterilized solid culture medium, carrying out inverted culture at 37 ℃ for 24h, and counting surface colonies. Antibacterial ratio of film ═ C₀-C₁)/C₀100% of C, wherein₀Concentration of the bacterial suspension before antibiosis (CFU/mL), C₁The concentration of the bacterial liquid after the sterilization (CFU/mL) is shown. The results are shown in Table 1.

TABLE 1 test results

As can be seen from the above table, the present invention has excellent antibacterial properties.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.