CN112680877B - Antibacterial non-woven fabric and preparation process thereof - Google Patents
Antibacterial non-woven fabric and preparation process thereof Download PDFInfo
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Abstract
The application relates to the field of non-woven fabrics, and particularly discloses an antibacterial non-woven fabric and a preparation process thereof. An antibacterial non-woven fabric comprises the following raw materials in parts by weight: 50-60 parts of polypropylene resin; 10-12 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde; 8-10 parts of nano TiO2. The preparation process comprises the following steps: s1, preparing fiber yarns; s2, preparing a fiber web; and S3, preparing non-woven fabrics. According to the antibacterial non-woven fabric, 3, 4-dihydroxy-5-nitro-benzaldehyde is adopted, and aldehyde groups in a molecular structure of 3, 4-dihydroxy-5-nitro-benzaldehyde can be combined with amino groups on an enzyme molecular structure in microbial cells, so that the enzyme activity is inhibited, the cell growth and proliferation of microbes are inhibited, the growth of microbes on the surface of the non-woven fabric is reduced, the mildew on the surface of the non-woven fabric is reduced, and the antibacterial effect of the non-woven fabric is improved; in addition, the preparation technology of the application improves the connection compactness among the fiber yarns by needling the fiber layer through the separation density, so that the prepared non-woven fabric has better toughness.
Description
Technical Field
The application relates to the field of non-woven fabrics, in particular to an antibacterial non-woven fabric and a preparation process thereof.
Background
Nonwoven fabrics, also known as nonwovens, are composed of oriented or random fibers. It is called a cloth because of its appearance and certain properties.
The non-woven fabric in the prior art is widely applied to the medical and health industry and is widely applied to production and life. For example, the adhesive has wide application in products such as paper diapers, sanitary towels, protective pads, wet tissues, band-aids, masks, food packaging bags and the like.
The inventor finds that the surface of the non-woven fabric can be mildewed after the non-woven fabric is placed for a long time, the processing and the use of the non-woven fabric are influenced, and the improvement is needed.
Disclosure of Invention
The application provides an antibacterial non-woven fabric and a preparation process thereof, and aims to solve the problem that the mildew phenomenon can occur on the surface of the non-woven fabric after the non-woven fabric is placed for a long time.
In a first aspect, the present application provides an antibacterial non-woven fabric, which adopts the following technical scheme:
an antibacterial non-woven fabric comprises the following raw materials in parts by weight:
50-60 parts of polypropylene resin;
10-12 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde;
8-10 parts of nano TiO2。
By adopting the technical scheme, the molecular structure of the 3, 4-dihydroxy-5-nitro-benzaldehyde contains aldehyde groups, and when microorganisms are adhered to the surface of the non-woven fabric, the aldehyde groupsThe group is combined with an amino group on an enzyme protein tyrosine kinase molecular structure in a microbial cell, so that the enzyme activity of the enzyme protein tyrosine kinase is inhibited, the cell growth and proliferation of the microbe are further inhibited, the breeding of the microbe on the surface of the non-woven fabric is reduced, the non-woven fabric is more durable, and the antibacterial effect of the non-woven fabric is improved; nano TiO22Absorbing ultraviolet light to form high-activity electrons with negative charges, and transferring the high-activity electrons to TiO2Is adsorbed on TiO2H of the surface2The O is oxidized to form free radicals, the free radicals penetrate through cell membranes of microorganisms adsorbed on the non-woven fabric and destroy membrane structures, combination of the 3, 4-dihydroxy-5-nitro-benzaldehyde and enzyme protein tyrosine kinase in microorganism cells is facilitated, and the effect of improving the antibacterial effect of the non-woven fabric is achieved.
Preferably, the raw material also comprises 4 to 6 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.2 to 0.4 part of catalyst according to parts by weight.
By adopting the technical scheme, the 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and the 3, 4-dihydroxy-5-nitro-benzaldehyde are mixed and then can react under the catalysis of a catalyst at high temperature, the molecular structure of a product obtained by the reaction contains a nonpolar carbon chain and a polar hydroxyl group, when a microorganism is adsorbed on the surface of the non-woven fabric, the nonpolar carbon chain part enters a phospholipid layer on a microorganism cell membrane, and the polar hydroxyl group enters a protein layer, so that a lipid-protein double molecular structure on the microorganism cell is damaged, the microbial cell is caused to be morphologically changed and die, the sterilization effect is achieved, and the antibacterial performance of the non-woven fabric is better.
Preferably, the catalyst is zirconium dioxide.
Preferably, the raw materials also comprise 1-2 parts by weight of 15% (v/v) diluted hydrochloric acid and 0.2-0.4 part by weight of iron powder.
By adopting the technical scheme, a product obtained by reacting 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid with 3, 4-dihydroxy-5-nitro-benzaldehyde is reduced under the catalysis of 15% (v/v) dilute hydrochloric acid and iron powder, and the product obtained by the reaction blocks microorganisms, so that adhesive molecules on the microorganisms are changed, the adhesion of the surfaces of the microorganisms is reduced, the microorganisms are not easy to adhere to the surfaces of non-woven fabrics and then breed, the bacteriostatic effect is achieved, and the antibacterial performance of the non-woven fabrics is improved.
Preferably, the raw materials further comprise 2-4 parts of acetonitrile and 2-4 parts of dihexadecyl methyl tertiary amine by weight.
By adopting the technical scheme, 3, 4-dihydroxy-5-nitro-benzaldehyde and dicetyl methyl tertiary amine react at high temperature, and the molecular structure of the product obtained by the reaction has nitrogen ions with positive charges, so that the density of the positive charges on the molecules is increased, the product is favorably adsorbed on the surface of microorganisms, the permeability of the cell walls of the microorganisms is further changed, the thalli are broken, and the antibacterial effect of the non-woven fabric is further improved; the solvent acetonitrile is used, the solubility of the dicetyl methyl tertiary amine in the acetonitrile is higher, so that the dicetyl methyl tertiary amine and the 3, 4-dihydroxy-5-nitro-benzaldehyde are mixed and dissolved more uniformly, the full reaction of the dicetyl methyl tertiary amine and the 3, 4-dihydroxy-5-nitro-benzaldehyde is facilitated, and the antibacterial effect of the non-woven fabric is improved in an auxiliary manner.
In a second aspect, the present application provides a process for preparing an antibacterial non-woven fabric, which adopts the following technical scheme:
a preparation process of an antibacterial non-woven fabric comprises the following steps:
s1, preparing fiber yarns; extruding and melting polypropylene resin, nano TiO and 3, 4-dihydroxy-5-nitro-benzaldehyde at 180 ℃ under 170-;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 50 needles/cm2-220 needles/cm2Needling is carried out at a density of 200 needles/cm2800 needles/cm2Is needle punched at a density of (1), and then continuously at 1000 needles/cm2-4000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
Through adopting above-mentioned technical scheme, the density carries out the acupuncture to the fibrous layer for the connection between the cellosilk is compacter compact, and the non-woven fabrics toughness of making is better.
Preferably, in the S1, 4-6 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 4-6 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.2-0.4 part of catalyst are stirred and mixed, stirred and reacted for 1-1.5h at 80-100 ℃, then added with 1-2 parts of 15% (v/v) diluted hydrochloric acid and 0.2-0.4 part of iron powder and stirred and mixed, stirred and reacted for 50-60min at 140 ℃, then cooled to 30-40 ℃, and then added with 2-4 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 2-4 parts of acetonitrile and 2-4 parts of dihexadecyl methyl tertiary amine and mixed, stirred and reacted for 30-40min, then added with the rest 3, 4-dihydroxy-5-nitro-benzaldehyde, 50-60 parts of polypropylene resin and 8-10 parts of nano TiO2, heating to 170-180 ℃, extruding and melting, stirring for reaction for 30-40min, spinning at the flow rate of 0.5g/min, and cooling to room temperature to obtain the fiber.
By adopting the technical scheme, the 3, 4-dihydroxy-5-nitro-benzaldehyde is added in batches, so that the reaction of the 3, 4-dihydroxy-5-nitro-benzaldehyde and the 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and the uniform mixing reaction of the 3, 4-dihydroxy-5-nitro-benzaldehyde and the dicetyl methyl tertiary amine are not interfered by other components, and the reaction product is favorably obtained.
In summary, the present application has the following beneficial effects:
1. according to the preparation method, the 3, 4-dihydroxy-5-nitro-benzaldehyde is adopted, and the aldehyde group in the molecular structure of the 3, 4-dihydroxy-5-nitro-benzaldehyde is combined with the amino group on the molecular structure of the enzyme in the microbial cell, so that the enzyme activity is inhibited, the cell growth and proliferation of the microbe are further inhibited, the breeding of the microbe on the surface of the non-woven fabric is reduced, and the antibacterial effect of the non-woven fabric is improved.
2. In the application, 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid is preferably adopted, the molecular structure of a product obtained by reacting 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid with 3, 4-dihydroxy-5-nitro-benzaldehyde contains a nonpolar carbon chain and a polar hydroxyl group, and the carbon chain and the hydroxyl group destroy the lipid-protein bimolecular structure on a microbial cell to cause the microbial cell to die due to morphological change, so that the sterilization effect is achieved, and the antibacterial performance of the non-woven fabric is better.
3. According to the method, the fiber layer is needled through the separation density, so that the connection compactness between the fibers is improved, and the effect of better toughness of the prepared non-woven fabric is achieved.
Detailed Description
The present application will be described in further detail with reference to examples.
In the present application, polypropylene resin is available from Lida chemical Co., Ltd, Yangzhou; 3, 4-dihydroxy-5-nitro-benzaldehyde was purchased from Wuhankemike biomedical technologies, Inc.; nano-TiO 2 was purchased from junan titanium chemical materials ltd; 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid was purchased from block chemical technology (Shanghai) Co., Ltd; dicetylmethyl tertiary amine is available from Wawland import and export Limited, Tianjin.
The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified.
Examples
Example 1
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22The preparation process comprises the following steps:
s1, preparing fiber yarns; 50 parts of polypropylene resin and 8 parts of nano TiO2Extruding and melting 10 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde at 170 ℃, stirring and reacting for 30min, spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber filaments;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 50 needles/cm2Needling is carried out at a density of 200 needles/cm2Is needle punched at a density of (1), and then continuously at 1000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 2
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22The preparation process comprises the following steps:
s1, preparing fiber yarns; 60 parts of polypropylene resin and 10 parts of nano TiO2Extruding and melting 12 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde at 180 ℃, stirring and reacting for 40min, spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber filaments;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 220 needles/cm2The needle punching is carried out at the density of (1), and the needle punching is finished at 800 needles/cm2Is subjected to needling at a density of, and then continued at 4000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 3
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22The preparation process comprises the following steps:
s1, preparing fiber yarns; 55 parts of polypropylene resin and 9 parts of nano TiO2Extruding and melting 11 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde at 175 ℃, stirring and reacting for 35min, spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber filaments;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 135 needles/cm2The needle punching is carried out at the density of (1), and after the needle punching is finished, the needle punching is carried out at the density of 500 needles/cm2Is needle punched at a density of (1), and then continuously at 2500 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 4
The application discloses a drugThe fungus non-woven fabric comprises the following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid; the preparation process of the catalyst zirconium dioxide comprises the following steps:
s1, preparing fiber yarns; 4 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 4 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.2 part of catalyst zirconium dioxide are stirred and mixed, stirred and reacted for 1 hour at the temperature of 80 ℃, and then the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 50 parts of polypropylene resin and 8 parts of nano TiO are added2Heating to 170 ℃ for extrusion melting, stirring for reaction for 30min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 50 needles/cm2Needling is carried out at a density of 200 needles/cm2Is needle punched at a density of (1), and then continuously at 1000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 5
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid; the preparation process of the catalyst zirconium dioxide comprises the following steps:
s1, preparing fiber yarns; stirring and mixing 6 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 6 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.4 part of catalyst zirconium dioxide, stirring and reacting at 100 ℃ for 1.5h, and then adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 60 parts of polypropylene resin and 10 parts of nano TiO2Heating to 180 ℃ for extrusion melting, stirring for reaction for 40min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 220 needles/cm2The needle punching is carried out at the density of (1), and the needle punching is finished at 800 needles/cm2Is subjected to needling at a density of, and then continued at 4000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 6
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid; the preparation process of the catalyst zirconium dioxide comprises the following steps:
s1, preparing fiber yarns; 5 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 5 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.3 part of catalyst zirconium dioxide are stirred and mixed, stirred and reacted for 1.5h at 90 ℃, and then the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 55 parts of polypropylene resin and 9 parts of nano TiO are added2Heating to 175 ℃ for extrusion melting, stirring for reaction for 35min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, placing the fiber net of S2 at 135 needles/cm2The needle punching is carried out at the density of (1), and after the needle punching is finished, the needle punching is carried out at the density of 500 needles/cm2Is needle punched at a density of (1), and then continuously at 2500 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 7
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid; zirconium dioxide as a catalyst; 15% (v/v) dilute hydrochloric acid; the preparation process of the iron powder comprises the following steps:
s1, preparing fiber yarns; 4 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde and 4 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-Stirring and mixing carboxylic acid and 0.2 part of catalyst zirconium dioxide, stirring and reacting for 1h at 80 ℃, then adding 1 part of 15% (v/v) dilute hydrochloric acid and 0.2 part of iron powder, stirring and mixing, stirring and reacting for 50min at 120 ℃, and then adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 50 parts of polypropylene resin and 8 parts of nano TiO2Heating to 170 ℃ for extrusion melting, stirring for reaction for 30min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 50 needles/cm2Needling is carried out at a density of 200 needles/cm2Is needle punched at a density of (1), and then continuously at 1000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 8
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid; zirconium dioxide as a catalyst; 15% (v/v) dilute hydrochloric acid; the preparation process of the iron powder comprises the following steps:
s1, preparing fiber yarns; stirring and mixing 6 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 6 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.4 part of catalyst zirconium dioxide, stirring and reacting at 100 ℃ for 1.5h, adding 2 parts of 15% (v/v) dilute hydrochloric acid and 0.4 part of iron powder, stirring and mixing, stirring and reacting at 140 ℃ for 60min, adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 60 parts of polypropylene resin and 10 parts of nano TiO2Heating to 180 ℃ for extrusion melting, stirring for reaction for 40min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 220 needles/cm2Needling is carried out under the density of (1)At 800 needles/cm2Is subjected to needling at a density of, and then continued at 4000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 9
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid; zirconium dioxide as a catalyst; 15% (v/v) dilute hydrochloric acid; the preparation process of the iron powder comprises the following steps:
s1, preparing fiber yarns; stirring and mixing 5 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 5 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.3 part of catalyst zirconium dioxide, stirring and reacting at 90 ℃ for 1.5h, adding 1 part of 15% (v/v) dilute hydrochloric acid and 0.3 part of iron powder, stirring and mixing, stirring and reacting at 130 ℃ for 55min, adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 55 parts of polypropylene resin and 9 parts of nano TiO2Heating to 175 ℃ for extrusion melting, stirring for reaction for 35min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, placing the fiber net of S2 at 135 needles/cm2The needle punching is carried out at the density of (1), and after the needle punching is finished, the needle punching is carried out at the density of 500 needles/cm2Is needle punched at a density of (1), and then continuously at 2500 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 10
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a Acetonitrile; the preparation process of the dicetyl methyl tertiary amine comprises the following steps:
s1, preparing fiber yarns; mixing 2 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 2 parts of acetonitrile and 2 parts of dicetyl methyl tertiary amine, stirring to react for 30-40min, and adding the rest3, 4-dihydroxy-5-nitro-benzaldehyde, 50 parts of polypropylene resin and 8 parts of nano TiO2Heating to 170 ℃ for extrusion melting, stirring for reaction for 30min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 50 needles/cm2Needling is carried out at a density of 200 needles/cm2Is needle punched at a density of (1), and then continuously at 1000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 11
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a Acetonitrile; the preparation process of the dicetyl methyl tertiary amine comprises the following steps:
s1, preparing fiber yarns; mixing 4 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 4 parts of acetonitrile and 4 parts of dicetyl methyl tertiary amine uniformly, stirring to react for 40min, and adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 60 parts of polypropylene resin and 10 parts of nano TiO2Heating to 180 ℃ for extrusion melting, stirring for reaction for 40min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 220 needles/cm2The needle punching is carried out at the density of (1), and the needle punching is finished at 800 needles/cm2Is subjected to needling at a density of, and then continued at 4000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 12
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a Acetonitrile; the preparation process of the dicetyl methyl tertiary amine comprises the following steps:
s1, preparing fiber yarns; mixing 3 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 3 parts of acetonitrile and 3 parts of dicetyl methyl tertiary amine uniformly, stirring to react for 35min, and adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 55 parts of polypropylene resin and 9 parts of nano TiO2Heating to 175 ℃ for extrusion melting, stirring for reaction for 35min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, placing the fiber net of S2 at 135 needles/cm2The needle punching is carried out at the density of (1), and after the needle punching is finished, the needle punching is carried out at the density of 500 needles/cm2Is needle punched at a density of (1), and then continuously at 2500 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 13
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid; zirconium dioxide as a catalyst; 15% (v/v) dilute hydrochloric acid; iron powder; acetonitrile; the preparation process of the dicetyl methyl tertiary amine comprises the following steps:
s1, preparing fiber yarns; stirring and mixing 4 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 4 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.2 part of catalyst zirconium dioxide, stirring and reacting for 1 hour at 80 ℃, adding 1 part of 15% (v/v) dilute hydrochloric acid and 0.2 part of iron powder, stirring and mixing, stirring and reacting for 50min at 120 ℃, then cooling to 30 ℃, continuously adding 2 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 2 parts of acetonitrile and 2 parts of dicetyl methyl tertiary amine, uniformly mixing, stirring and reacting for 30-40min, then adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 50 parts of polypropylene resin and 8 parts of nano TiO2Heating to 170 deg.C for extrusion melting, stirring for reaction for 30min, spraying at 0.5g/min, cooling to room temperature,preparing fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 50 needles/cm2Needling is carried out at a density of 200 needles/cm2Is needle punched at a density of (1), and then continuously at 1000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 14
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid; zirconium dioxide as a catalyst; 15% (v/v) dilute hydrochloric acid; iron powder; acetonitrile; the preparation process of the dicetyl methyl tertiary amine comprises the following steps:
s1, preparing fiber yarns; stirring and mixing 6 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 6 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.4 part of catalyst zirconium dioxide, stirring and reacting for 1.5h at 100 ℃, adding 2 parts of 15% (v/v) dilute hydrochloric acid and 0.4 part of iron powder, stirring and mixing, stirring and reacting for 60min at 140 ℃, cooling to 40 ℃, continuously adding 4 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 4 parts of acetonitrile and 4 parts of dicetyl methyl tertiary amine, stirring and reacting for 40min, adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 60 parts of polypropylene resin and 10 parts of nano TiO2Heating to 180 ℃ for extrusion melting, stirring for reaction for 40min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 220 needles/cm2The needle punching is carried out at the density of (1), and the needle punching is finished at 800 needles/cm2Is subjected to needling at a density of, and then continued at 4000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 15
The application discloses antibiotic non-woven fabrics, including following raw materials: a polypropylene resin; 3, 4-dihydroxy-5-nitro-benzaldehyde; nano TiO22(ii) a 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid; zirconium dioxide as a catalyst; 15% (v/v) dilute hydrochloric acid; iron powder; acetonitrile; the preparation process of the dicetyl methyl tertiary amine comprises the following steps:
s1, preparing fiber yarns; stirring and mixing 5 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 5 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.3 part of catalyst zirconium dioxide, stirring and reacting at 90 ℃ for 1.5h, adding 1 part of 15% (v/v) dilute hydrochloric acid and 0.3 part of iron powder, stirring and mixing at 130 ℃ for 55min, cooling to 35 ℃, continuously adding 3 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 3 parts of acetonitrile and 3 parts of dicetyl methyl tertiary amine, stirring and reacting for 35min, adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 55 parts of polypropylene resin and 9 parts of nano TiO2Heating to 175 ℃ for extrusion melting, stirring for reaction for 35min, then spraying at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber yarns;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, placing the fiber net of S2 at 135 needles/cm2The needle punching is carried out at the density of (1), and after the needle punching is finished, the needle punching is carried out at the density of 500 needles/cm2Is needle punched at a density of (1), and then continuously at 2500 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
The contents of the components are shown in table 1 below.
Example 16
The difference from example 7 is that 3, 4-dihydroxy-5-nitro-benzaldehyde is not added and the contents of the components are shown in table 1 below.
Comparative example
Comparative example 1
The difference from example 1 is that a nonwoven fabric made of polypropylene resin was used as a blank control.
Comparative example 2
The difference from example 1 is that 3, 4-dihydroxy-5-nitro-benzaldehyde is replaced by phenol, and the contents of the components are shown in table 1 below.
Comparative example 3
The difference from example 1 is that 3, 4-dihydroxy-5-nitro-benzaldehyde is not added and the contents of the components are shown in table 1 below.
Comparative example 4
The difference from example 4 is that 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid is replaced by sulfonamide and the content of each component is shown in table 1 below.
Comparative example 5
The difference from example 4 is that zirconium dioxide is replaced by tin sulfate, and the contents of the components are shown in table 1 below.
Comparative example 6
The difference from example 7 is that 15% (v/v) diluted hydrochloric acid was replaced with 30% (v/v) diluted hydrochloric acid, and the contents of the respective components are shown in Table 1 below.
Comparative example 7
The difference from example 10 is that dicetylmethyl tertiary amine was replaced with propane, and the contents of each component are shown in table 1 below.
TABLE 1-1 ingredient content tables for examples 1-16 and comparative examples 2-7
Tables 1-2 component content tables of examples 1-16 and comparative examples 2-7
The performance detection test is used for determining the bacteriostasis rate of the non-woven fabric: the nonwoven fabrics of examples 1 to 16 and comparative examples 1 to 7 were cut into 100mm × 100mm samples, and the samples were dipped in a concentration of 103Putting the staphylococcus aureus liquid in 40W light for irradiation, shaking for 1h at 25 ℃, measuring the bacterial number by adopting plate counting after finishing, comparing with the sample prepared in comparative example 1, calculating the bacteriostasis rate, wherein the larger the bacteriostasis rate is, the larger the bacteriostasis rate isThe better the antibacterial effect of the non-woven fabric, i.e. the less likely the non-woven fabric will mildew; the test results are shown in table 2 below.
TABLE 2 test results of examples and comparative examples
1. As can be seen by combining example 1 and comparative examples 1 to 3 with table 2, the addition of 3, 4-dihydroxy-5-nitro-benzaldehyde improves the antimicrobial effect of the nonwoven fabric, probably because: the aldehyde group in the molecular structure of the 3, 4-dihydroxy-5-nitro-benzaldehyde is combined with the amino group in the molecular structure of the enzyme in the microbial cell, so that the enzyme activity is inhibited, the cell growth and proliferation of the microbe are inhibited, the breeding of the microbe on the surface of the non-woven fabric is reduced, and the antibacterial effect of the non-woven fabric is improved.
2. As can be seen by combining example 1 and comparative examples 1 and 3 with Table 2, the nano TiO compound2The addition of (b) improves the antimicrobial effect of the nonwoven fabric, which may be due to: nano TiO22The free radicals are generated after the ultraviolet light is absorbed, penetrate through cell membranes of microorganisms adsorbed on the non-woven fabric and destroy membrane structures, so that the microorganisms are killed, and the antibacterial effect of the non-woven fabric is improved.
3. Combining examples 1, 4 and comparative examples 3,4 with table 2, it can be seen that the co-addition of 3, 4-dihydroxy-5-nitro-benzaldehyde and 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid improves the antimicrobial effect of the nonwoven fabric, probably because: 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 3, 4-dihydroxy-5-nitro-benzaldehyde are mixed and react, the molecular structure of the product obtained by the reaction contains nonpolar carbon chains and polar hydroxyl groups, and the nonpolar carbon chains and the polar hydroxyl groups destroy the cell structure of microorganisms to cause the morphological change and death of the microorganisms, so that the sterilization effect is achieved, and the antibacterial performance of the non-woven fabric is improved.
4. Combining examples 1, 4, 7 and comparative example 6 with table 2, it can be seen that the co-addition of 15% (v/v) dilute hydrochloric acid and iron powder can improve the antibacterial performance of the nonwoven fabric, probably because: the product obtained by the reaction of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 3, 4-dihydroxy-5-nitro-benzaldehyde is reduced under the catalysis of 15% (v/v) dilute hydrochloric acid and iron powder, and the product obtained by the reaction blocks microorganisms, so that the adhesion of the surfaces of the microorganisms is reduced, the microorganisms are not easily adhered to the surfaces of non-woven fabrics and then bred, the bacteriostatic effect is achieved, and the antibacterial performance of the non-woven fabrics is improved.
5. Combining examples 4 and 10 and comparative example 7 with table 2, it can be seen that the co-addition of 3, 4-dihydroxy-5-nitro-benzaldehyde and dicetyl methyl tertiary amine is beneficial to improving the antibacterial performance of the nonwoven fabric, probably because: 3, 4-dihydroxy-5-nitro-benzaldehyde and dihexadecyl methyl tertiary amine react, and the molecular structure of the product obtained by the reaction has N with positive charges, so that the density of the positive charges on the molecules is increased, the product is favorably adsorbed on the surface of a microorganism, the permeability of the cell wall of the microorganism is further changed, the thallus is broken, and the antibacterial effect of the non-woven fabric is improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (2)
1. An antibacterial non-woven fabric, which is characterized in that: the composite material comprises the following raw materials in parts by weight:
50-60 parts of polypropylene resin;
10-12 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde;
8-10 parts of nano TiO2；
4-6 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid;
0.2-0.4 parts of catalyst;
2-4 parts of acetonitrile;
2-4 parts of dicetylmethyl tertiary amine;
1-2 parts of 15% (v/v) dilute hydrochloric acid;
0.2-0.4 parts of iron powder;
the preparation process of the antibacterial non-woven fabric comprises the following steps:
s1, preparing fiber yarns; stirring and mixing 4-6 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 4-6 parts of 1- (butane-1-sulfonyl) pyrrolidine-2-carboxylic acid and 0.2-0.4 part of catalyst, stirring and reacting at 80-100 ℃ for 1-1.5h, adding 1-2 parts of 15% (v/v) diluted hydrochloric acid and 0.2-0.4 part of iron powder, stirring and mixing, stirring and reacting at 120-140 ℃ for 50-60min, cooling to 30-40 ℃, continuously adding 2-4 parts of 3, 4-dihydroxy-5-nitro-benzaldehyde, 2-4 parts of acetonitrile and 2-4 parts of dicetyl methyl tertiary amine, uniformly mixing, stirring and reacting for 30-40min, adding the rest of 3, 4-dihydroxy-5-nitro-benzaldehyde, 50-60 parts of polypropylene resin and 8-10 parts of nano TiO2Heating to 170-180 ℃ for extrusion melting, stirring for reaction for 30-40min, spinning at a flow rate of 0.5g/min, and cooling to room temperature to obtain fiber filaments;
s2, preparing a fiber web; opening and carding the fiber filaments in the S1, and then paving the fiber filaments into a fiber net;
s3, preparing non-woven fabrics; the web of S2 was laid at 50 needles/cm2-220 needles/cm2Needling is carried out at a density of 200 needles/cm2800 needles/cm2Is needle punched at a density of (1), and then continuously at 1000 needles/cm2-4000 needles/cm2And (4) needling is carried out under the density of the (A) to obtain the non-woven fabric.
2. The antibacterial nonwoven fabric according to claim 1, characterized in that: the catalyst is zirconium dioxide.
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