Antibacterial PVA material and preparation process thereof

Abstract

The invention relates to an antibacterial PVA material and a preparation process thereof, and belongs to the technical field of PVA materials, the preparation process comprises the following steps: S1, pretreating a part of raw materials to obtain a base solution, sepiolite A and a blend for later use; s2, mixing the sepiolite A with alpinia katsumadai essential oil, pimpinella diversifolia essential oil and eucalyptus globulus essential oil to obtain sepiolite B for later use; s3, mixing sepiolite B, a base solution, diatomite, the blend and a dispersing agent to prepare a PVA spinning solution; s4, the PVA spinning solution is prepared into PVA fibers; and S5, processing the PVA fibers into a non-woven fabric, namely the antibacterial PVA material finished product. The alpinia katsumadai essential oil, the pimpinella diversifolia essential oil and the eucalyptus globulus essential oil are combined, so that the prepared PVA material has an excellent antibacterial effect; meanwhile, the PVA material prepared by the invention also has outstanding hydrophilicity, so that the PVA material can be easily dissolved in water.

Description

Technical Field

[0001] The present invention belongs to the technical field of PVA materials, and in particular, relates to an antibacterial PVA material and a preparation process thereof. Background Art

[0002] PVA is a water-soluble material with the characteristics of being flexible, lightweight, breathable, easy to decompose, non-toxic and non-irritating, inexpensive, and recyclable. These characteristics make PVA materials have broad application prospects in agriculture, medical care, light industry, and other fields. For example, in agriculture, PVA materials are often made into non-woven fabrics for use as covering materials to increase soil temperature and promote crop growth; in the medical and health field, PVA materials are often made into antibacterial and hydrophilic non-woven fabrics for use in feminine hygiene products and baby diapers. Hydrophilic non-woven fabrics can quickly guide liquids into the absorption layer and minimize the reverse osmosis of liquids, thereby providing better user experience and protection effects; and non-woven fabrics with antibacterial properties can effectively prevent the spread of pathogens, which is of great significance to protecting public health.

[0003] However, most of the PVA materials currently available on the market are difficult to satisfy the requirements of having both antibacterial and hydrophilic properties, or there are materials that have both properties but their performance effects are poor. Therefore, providing a PVA material with antibacterial and hydrophilic properties has important practical significance and broad market prospects. Summary of the invention

[0004] The purpose of the present invention is to provide an antibacterial PVA material and a preparation process thereof, which solves the problem of poor antibacterial and hydrophilic properties of PVA materials in the prior art.

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

[0006] A preparation process of an antibacterial PVA material, the preparation process specifically comprising the following steps:

[0007] S1, pre-treating part of the raw materials to obtain base liquid, sepiolite A and blending material for standby use;

[0008] S2, sepiolite A and cardamom essential oil, fennel essential oil, eucalyptus globulus essential oil are mixed to obtain sepiolite B, for standby use;

[0009] S3, mixing sepiolite B, base liquid, diatomaceous earth, blend and dispersant to prepare PVA spinning solution;

[0010] S4, preparing PVA fibers from the PVA spinning solution;

[0011] S5, processing the PVA fibers into non-woven fabrics, i.e., the finished antibacterial PVA material.

[0012] As a preferred technical solution of the present invention, step S1 is specifically as follows: PVA and pure water are configured into a PVA solution, the temperature is controlled and stirred to obtain a base liquid, which is set aside; sepiolite and a 1% hydrochloric acid solution are mixed and stirred, centrifuged and washed, and the temperature is controlled and dried to obtain sepiolite A, which is set aside; styrene-maleic anhydride copolymer and sodium hydroxide solution are mixed and stirred at a controlled temperature, a 10% hydrochloric acid solution is added to adjust the pH, and then deionized water is added and stirred to obtain a blend, which is set aside.

[0013] Furthermore, the degree of polymerization of the PVA is 1800-2000.

[0014] Furthermore, the sepiolite is 800 mesh.

[0015] Furthermore, the mass ratio of the sepiolite to the hydrochloric acid solution is 1:5.5-6; the dosage ratio of the styrene-maleic anhydride copolymer, the sodium hydroxide solution and the deionized water is 1g:6-8g:700-800mL.

[0016] Furthermore, the mass fraction of the PVA solution is 3%; the mass fraction of the sodium hydroxide solution is 5%.

[0017] Furthermore, the temperature of the temperature control and stirring is 90-95°C, and the time is 5-6h; the time of mixing and stirring the sepiolite and hydrochloric acid solution is 1-1.5h; the temperature of the temperature control and drying is 85-90°C; the temperature of the temperature control and stirring is 25-27°C, and the time is 1.5-2h; and the pH is adjusted to pH=5.

[0018] As a preferred technical solution of the present invention, step S2 is specifically: mixing sepiolite A and anhydrous ethanol and ultrasonically dispersing them, adding cardamom essential oil, anise essential oil and eucalyptus essential oil, mixing evenly and stirring, and drying at a controlled temperature to obtain sepiolite B.

[0019] Furthermore, the usage ratio of the sepiolite A, anhydrous ethanol, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil is 2-3g:15-18mL:0.03-0.04g:0.04-0.05g:0.02-0.03g.

[0020] Furthermore, the cardamom essential oil is obtained by conventional steam distillation using water as a solvent and the dried seeds of the perennial herbaceous plant cardamom of the genus Alpinia in the Zingiberaceae family at a ratio of 1 g:15 mL of cardamom seeds to water; the anise essential oil is obtained by conventional steam distillation using 70% alcohol by mass fraction, the dried seeds of the herbaceous plant anise of the genus Anise in the Umbelliferae family at a ratio of anise seeds to alcohol of 1 g:10 mL; the globulus essential oil is obtained by conventional steam distillation using 50% alcohol by mass fraction, the dried leaves of the tree genus Eucalyptus in the genus Eucalyptus in the Myrtaceae family at a ratio of 1 g:10 mL of globulus leaves to alcohol.

[0021] Furthermore, the ultrasonic dispersion time is 10-15 minutes; the stirring time is 24-26 hours; the temperature of the temperature-controlled drying is 55-60°C and the time is 8-10 hours.

[0022] As a preferred technical solution of the present invention, step S3 specifically comprises: mixing sepiolite B and the base liquid uniformly and firstly ultrasonicating and then homogenizing, adding diatomaceous earth, blending material and dispersant and magnetically stirring to obtain a PVA spinning solution.

[0023] Furthermore, the diatomaceous earth is 600 mesh.

[0024] Furthermore, the mass ratio of the sepiolite B, the base liquid, the diatomaceous earth, the blend and the dispersant is 0.8-1:20-22:0.75-0.85:0.5-0.8:0.5-0.7.

[0025] Furthermore, the time for the ultrasonication and then the homogenization is 2-3 minutes respectively; the time for the magnetic stirring is 1-1.5 hours.

[0026] As a preferred technical solution of the present invention, step S4 is specifically: PVA spinning solution is placed in a spinneret hole diameter of 0.8-2mm, a spinning temperature of 80-90°C, a hot air temperature of 120-150°C, annular blowing, and the hot air stretching multiple of the fiber is 2-5 times to obtain PVA fiber.

[0027] As a preferred technical solution of the present invention, step S5 specifically comprises: randomly arranging and thermally bonding the PVA fibers on a hot roller under the action of a hot air flow, and then subjecting the fibers to a hydroformylation bath treatment to obtain a finished antibacterial PVA material.

[0028] Furthermore, the hydroformylation bath comprises: 210-225 g / L sulfuric acid, 68-70 g / L sodium sulfate, and 22-25 g / L formaldehyde; the hydroformylation temperature is 60-70° C., and the hydroformylation time is 15-18 min.

[0029] As a preferred technical solution of the present invention, the present invention also provides a PVA material prepared by the above-mentioned preparation process.

[0030] Beneficial effects of the present invention:

[0031] (1) The present invention adds cardamom essential oil containing β-pinene, 1,8-cineole and p-cymene, etc., which has a broad-spectrum antibacterial effect; adds anise essential oil whose main component is anethole and also contains α-cedrene and β-bisabolene, so as to destroy the bacterial biofilm structure and allow endogenous substances to leak out; adds eucalyptus globulus essential oil rich in 1,8-cineole and also contains pinene, terpineol acetate, α-terpineol, etc., so as to affect the activity of enzymes related to bacterial physiological metabolism and interfere with the normal physiological metabolic process of bacteria; that is, the present invention adds The combination of cardamom essential oil, anise essential oil and eucalyptus globulus essential oil synergistically increases the antibacterial effect of the compound essential oil from the different dimensions of broad-spectrum antibacterial, destruction of bacterial biofilm structure and interference with normal physiological metabolism of bacteria; on this basis, the porous structure of sepiolite is used to adsorb the compound essential oil into the sepiolite, which can effectively achieve the sustained-release antibacterial effect of the essential oil. Finally, polyvinyl alcohol solution is used as the matrix to prepare PVA material containing sepiolite adsorbed with compound essential oil, which also makes the PVA material have excellent antibacterial effect.

[0032] (2) The present invention adds styrene-maleic anhydride copolymer, introduces polar hydrophilic oxygen-containing groups into the system, improves the hydrophilic properties of the system, and constructs a network structure. On this basis, diatomaceous earth and sepiolite are compounded and dispersed in the network structure to form micropores. Excellent channels are formed between these pore structures, which help increase the contact area between the inside of the material and the outside world, thereby improving the hydrophilicity of the PVA material, making the PVA material easily soluble in water, and the finished PVA material has outstanding solubility. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0034] The cardamom essential oil used in the embodiment of the present invention is obtained by conventional steam distillation of the dried seeds of the perennial herbaceous plant cardamom of the genus Alpinia in the Zingiberaceae family with water as a solvent, and the ratio of cardamom seeds to water is 1g:15mL; the anise essential oil is obtained by conventional steam distillation of the dried seeds of the herbaceous plant anise of the genus Anise in the Umbelliferae family with 70% alcohol by mass as a solvent, and the ratio of anise seeds to alcohol is 1g:10mL; the eucalyptus globulus essential oil is obtained by conventional steam distillation of the dried leaves of the tree genus Eucalyptus in the genus Eucalyptus in the Myrtaceae family with 50% alcohol by mass as a solvent, and the ratio of eucalyptus globulus leaves to alcohol is 1g:10mL; the styrene-maleic anhydride copolymer used in the embodiment of the present invention was purchased from Wuhan Kemik Biomedical Technology Co., Ltd.; it will not be repeated later.

[0035] Example 1

[0036] A preparation process of an antibacterial PVA material, the preparation process specifically comprising the following steps:

[0037] S1. PVA with a degree of polymerization of 1900 and pure water are configured into a PVA solution with a mass fraction of 3%, the temperature is controlled at 90°C and stirred for 5 hours to obtain a base liquid for standby use; sepiolite and a hydrochloric acid solution with a mass fraction are mixed and stirred for 1 hour, centrifuged and washed, and dried at a temperature of 90°C to obtain sepiolite A for standby use; styrene-maleic anhydride copolymer and a sodium hydroxide solution with a mass fraction are mixed uniformly and the temperature is controlled at 27°C and stirred for 1.5 hours, a hydrochloric acid solution with a mass fraction of 10% is added to adjust the pH to 5, and then deionized water is added and stirred uniformly to obtain a blend for standby use;

[0038] The mass ratio of the sepiolite to the hydrochloric acid solution with a mass fraction of 1% is 1:5.5; the amount ratio of the styrene-maleic anhydride copolymer, the sodium hydroxide solution and the deionized water is 1g:8g:700mL;

[0039] S2, sepiolite A and anhydrous ethanol were mixed and ultrasonically dispersed for 10 minutes, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil were added, mixed evenly and stirred for 24 hours, and then dried at 58° C. for 10 hours to obtain sepiolite B;

[0040] The usage ratio of the sepiolite A, anhydrous ethanol, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil is 2g:18mL:0.035g:0.05g:0.02g;

[0041] S3, the sepiolite B and the base liquid were mixed evenly and ultrasonically homogenized for 2.5 min each, 600 mesh diatomaceous earth, the blend and Wentou 80 were added and magnetically stirred for 1 h to obtain a PVA spinning solution;

[0042] The mass ratio of the sepiolite B, base liquid, diatomaceous earth, blend and dispersant is 0.8:21:0.75:0.5:0.7;

[0043] S4, the PVA spinning solution obtained in step S3 is subjected to the conditions of spinneret hole diameter of 0.8 mm, spinning temperature of 85° C., hot air temperature of 150° C., annular blowing, and hot air drafting multiple of 2 times to obtain PVA fiber;

[0044] S5, randomly arranging the PVA fibers obtained in step S4 on a hot roller under the action of a hot air flow to form thermal bonds, and then performing a hydroformylation bath treatment to obtain a finished antibacterial PVA material;

[0045] The hydroformylation bath composition is: 210 g / L sulfuric acid, 68 g / L sodium sulfate, 25 g / L formaldehyde; the hydroformylation temperature is 60° C., and the hydroformylation time is 15 min;

[0046] The PVA material weight obtained in this embodiment is 50 g / m 2 .

[0047] Example 2

[0048] A preparation process of an antibacterial PVA material, the preparation process specifically comprising the following steps:

[0049] S1. PVA with a degree of polymerization of 1800 and pure water are configured into a PVA solution with a mass fraction of 3%, the temperature is controlled at 95°C and stirred for 5.5 hours to obtain a base liquid for standby use; sepiolite and a hydrochloric acid solution with a mass fraction of 1% are mixed and stirred for 1 hour, centrifuged and washed, and dried at a temperature of 85°C to obtain sepiolite A for standby use; styrene-maleic anhydride copolymer and a sodium hydroxide solution with a mass fraction are mixed uniformly and the temperature is controlled at 25°C and stirred for 2 hours, a hydrochloric acid solution with a mass fraction of 10% is added to adjust the pH to 5, and then deionized water is added and stirred uniformly to obtain a blend for standby use;

[0050] The mass ratio of the sepiolite to the hydrochloric acid solution with a mass fraction of 1% is 1:6; the amount ratio of the styrene-maleic anhydride copolymer, the sodium hydroxide solution and the deionized water is 1g:6g:750mL;

[0051] S2, sepiolite A and anhydrous ethanol were mixed and ultrasonically dispersed for 12.5 min, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil were added, mixed evenly and stirred for 25 h, and then dried at 55 ° C for 9 h to obtain sepiolite B;

[0052] The usage ratio of the sepiolite A, anhydrous ethanol, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil is 3g:15mL:0.04g:0.04g:0.03g;

[0053] S3, the sepiolite B and the base liquid were mixed evenly and ultrasonically homogenized for 2 minutes each, 600 mesh diatomaceous earth, the blend and Wentou 80 were added and magnetically stirred for 1 hour to obtain a PVA spinning solution;

[0054] The mass ratio of the sepiolite B, base liquid, diatomaceous earth, blend and dispersant is 1:20:0.8:0.65:0.5;

[0055] S4, the PVA spinning solution obtained in step S3 is subjected to the conditions of spinneret hole diameter of 1.5 mm, spinning temperature of 80° C., hot air temperature of 120° C., annular blowing, and hot air drafting multiple of 5 times to obtain PVA fiber;

[0056] S5, randomly arranging the PVA fibers obtained in step S4 on a hot roller under the action of a hot air flow to form thermal bonds, and then performing a hydroformylation bath treatment to obtain a finished antibacterial PVA material;

[0057] The hydroformylation bath composition is: 225 g / L sulfuric acid, 69 g / L sodium sulfate, and 22 g / L formaldehyde; the hydroformylation temperature is 65° C., and the hydroformylation time is 16.5 min.

[0058] The PVA material obtained in this example has a gram weight of 45 g / m 2 .

[0059] Example 3

[0060] A preparation process of an antibacterial PVA material, the preparation process specifically comprising the following steps:

[0061] S1. PVA with a polymerization degree of 2000 and pure water are configured into a PVA solution with a mass fraction of 3%, and the solution is stirred at 93°C for 6 hours to obtain a base liquid for standby use; sepiolite and a hydrochloric acid solution with a mass fraction of 1% are mixed and stirred for 1.5 hours, centrifuged and washed, and dried at 88°C to obtain sepiolite A for standby use; styrene-maleic anhydride copolymer and a sodium hydroxide solution with a mass fraction are mixed uniformly and stirred at 226°C for 2 hours, a hydrochloric acid solution with a mass fraction of 10% is added to adjust the pH to 5, and then deionized water is added and stirred uniformly to obtain a blend for standby use;

[0062] The mass ratio of the sepiolite to the 1% hydrochloric acid solution is 1:5.7; the amount ratio of the styrene-maleic anhydride copolymer, the sodium hydroxide solution and the deionized water is 1g:7g:800mL;

[0063] S2, sepiolite A and anhydrous ethanol were mixed and ultrasonically dispersed for 15 minutes, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil were added, mixed evenly and stirred for 26 hours, and then dried at 60° C. for 8 hours to obtain sepiolite B;

[0064] The usage ratio of the sepiolite A, anhydrous ethanol, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil is 2.5g:16.5mL:0.03g:0.045g:0.025g;

[0065] S3, the sepiolite B and the base liquid were mixed evenly and ultrasonically treated for 3 minutes each, and then the diatomaceous earth, the blended material and Wentu 80 were added and magnetically stirred for 1.5 hours to obtain a PVA spinning solution;

[0066] The mass ratio of the sepiolite B, base liquid, diatomaceous earth, blend and dispersant is 0.9:22:0.85:0.8:0.6;

[0067] S4, the PVA spinning solution obtained in step S3 is subjected to the conditions of a spinneret hole diameter of 2 mm, a spinning temperature of 90° C., a hot air temperature of 135° C., an annular blowing, and a hot air drafting multiple of 3 times to obtain PVA fibers;

[0068] S5, randomly arranging the PVA fibers obtained in step S4 on a hot roller under the action of a hot air flow to form thermal bonds, and then performing a hydroformylation bath treatment to obtain a finished antibacterial PVA material;

[0069] The hydroformylation bath composition is: 217 g / L sulfuric acid, 70 g / L sodium sulfate, 23 g / L formaldehyde; the hydroformylation temperature is 70° C., and the hydroformylation time is 18 min.

[0070] The PVA material obtained in this example has a gram weight of 55 g / m 2 .

[0071] Comparative Example 1

[0072] Compared with Example 1, the difference is that in step S2 of Comparative Example 1, no cardamom essential oil is added, that is, the usage ratio of the sepiolite A, anhydrous ethanol, fennel essential oil and eucalyptus globulus essential oil is 2g:18mL:0.067g:0.038g; and the other operating steps and parameters remain unchanged.

[0073] Comparative Example 2

[0074] Compared with Example 1, the difference is that in step S2 of Comparative Example 2, no anise essential oil is added, that is, the usage ratio of the sepiolite A, anhydrous ethanol, cardamom essential oil and eucalyptus globulus essential oil is 2g:18mL:0.06g:0.045g; and the remaining operating steps and parameters remain unchanged.

[0075] Comparative Example 3

[0076] Compared with Example 1, the difference is that in step S2 of Comparative Example 3, no eucalyptus globulus essential oil is added, that is, the usage ratio of the sepiolite A, anhydrous ethanol, cardamom essential oil and fennel essential oil is 2g:18mL:0.045g:0.06g; and the other operating steps and parameters remain unchanged.

[0077] Comparative Example 4

[0078] Compared with Example 1, the difference is that in Comparative Example 4, the sepiolite in steps S1, S2 and S3 is replaced by diatomaceous earth, that is:

[0079] In step S1: diatomaceous earth and a 1% hydrochloric acid solution are mixed and stirred for 1 hour, centrifuged and washed, and dried at 90° C. to obtain diatomaceous earth A for later use; the mass ratio of the diatomaceous earth to the 1% hydrochloric acid solution is 1:5.5;

[0080] In step S2: diatomaceous earth A and anhydrous ethanol are mixed and ultrasonically dispersed for 10 minutes, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil are added, mixed evenly and stirred for 24 hours, and then dried at 58° C. for 10 hours to obtain diatomaceous earth B;

[0081] The dosage ratio of the diatomaceous earth A, anhydrous ethanol, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil is 2g:18mL:0.035g:0.05g:0.02g;

[0082] In step S3: diatomaceous earth B and base liquid are mixed evenly and first ultrasonically and then homogenized for 2.5 minutes each, and diatomaceous earth, blend and dispersant are added and magnetically stirred for 1 hour to obtain a PVA spinning solution;

[0083] The mass ratio of the diatomite B, base liquid, diatomite, blend and Wentu 80 is 0.8:21:0.75:0.5:0.7;

[0084] The remaining operation steps and parameters remain unchanged.

[0085] Comparative Example 5

[0086] Compared with Example 1, the difference is that diatomaceous earth is not added in step S3 in Comparative Example 5, that is:

[0087] S3, the sepiolite B and the base liquid were mixed evenly and ultrasonically homogenized for 2.5 min each, and the blended material and Wentu 80 were added and magnetically stirred for 1 h to obtain a PVA spinning solution;

[0088] The mass ratio of the sepiolite B, base liquid, blend and dispersant is 1.55:21:0.5:0.7;

[0089] The remaining operation steps and parameters remain unchanged.

[0090] Comparative Example 6

[0091] Compared with Example 1, the difference is that no styrene-maleic anhydride copolymer is added in Comparative Example 6, that is, no blend is added in step S3 of Comparative Example 6, that is:

[0092] S3, the sepiolite B and the base liquid were mixed evenly and ultrasonically treated for 2.5 min each, and diatomaceous earth and Wentou 80 were added and magnetically stirred for 1 h to obtain a PVA spinning solution;

[0093] The mass ratio of the sepiolite B, base liquid, diatomaceous earth and dispersant is 0.8:21:0.75:0.7;

[0094] The remaining operation steps and parameters remain unchanged.

[0095] Test Example 1

[0096] According to GB / T 20944.3-2008, the antibacterial properties of the antibacterial PVA material products prepared in Examples 1-3 and Comparative Examples 1-3 were tested, and the experimental bacteria were Staphylococcus aureus ATCC6538 and Escherichia coli ATCC11229; the results are shown in Table 1.

[0097] Table 1

[0098] Width of E. coli inhibition zone (mm) Width of Staphylococcus aureus inhibition zone (mm) Example 1 4.92 4.94 Example 2 4.89 4.92 Example 3 4.88 4.90 Comparative Example 1 3.80 3.82 Comparative Example 2 3.55 3.58 Comparative Example 3 3.69 3.71

[0099] As can be seen from Table 1, the PVA material prepared by the present invention has an excellent antibacterial effect. This is because the present invention uses cardamom essential oil, anise essential oil and eucalyptus globulus essential oil in combination, starting from different dimensions of broad-spectrum antibacterial, destroying bacterial biofilm structure, and interfering with normal physiological metabolism of bacteria, synergistically increasing the antibacterial effect of the compound essential oil; applying it to the preparation of PVA material can also make the PVA material have an excellent antibacterial effect.

[0100] Test Example 2

[0101] The finished antibacterial PVA materials obtained in Examples 1-3 and Comparative Examples 4-6 were cut into a size of 5 mm×10 cm and a contact angle test was performed using a contact angle meter. Five points were randomly selected for each sample for testing, and the results were averaged. The results are shown in Table 2.

[0102] Table 2

[0103] Contact angle (°) Example 1 37 Example 2 37 Example 3 36 Comparative Example 4 48 Comparative Example 5 54 Comparative Example 6 59

[0104] It can be seen from Table 2 that the PVA material prepared by the present invention has outstanding hydrophilicity, which can make the PVA material easily soluble in water.

[0105] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0106] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A preparation process of an antibacterial PVA material, characterized in that: The preparation process specifically comprises the following steps: S1, pre-treating part of the raw materials to obtain base liquid, sepiolite A and blending material for standby use; S2, sepiolite A and cardamom essential oil, fennel essential oil, eucalyptus globulus essential oil are mixed to obtain sepiolite B, for standby use; S3, mixing sepiolite B, base liquid, diatomaceous earth, blend and dispersant to prepare PVA spinning solution; S4, preparing PVA fibers from the PVA spinning solution; S5, processing the PVA fibers into non-woven fabrics, i.e., the finished antibacterial PVA material.

2. The preparation process of the antibacterial PVA material according to claim 1, characterized in that: Step S2 is specifically as follows: sepiolite A and anhydrous ethanol are mixed and ultrasonically dispersed, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil are added, mixed evenly and stirred, and dried under temperature control to obtain sepiolite B.

3. The preparation process of the antibacterial PVA material according to claim 2, characterized in that: The usage ratio of the sepiolite A, anhydrous ethanol, cardamom essential oil, anise essential oil and eucalyptus globulus essential oil is 2-3g:15-18mL:0.03-0.04g:0.04-0.05g:0.02-0.03g.

4. The preparation process of the antibacterial PVA material according to claim 2, characterized in that: The cardamom essential oil is prepared by conventional steam distillation using water as a solvent and the dried seeds of the perennial herbaceous plant cardamom of the genus Alpinia in the Zingiberaceae family at a ratio of 1 g:15 mL of cardamom seeds to water; the anise essential oil is prepared by conventional steam distillation using 70% alcohol by mass fraction of the dried seeds of the herbaceous plant anise of the genus Anise in the Umbelliferae family at a ratio of anise seeds to alcohol of 1 g:10 mL; the eucalyptus globulus essential oil is prepared by conventional steam distillation using 50% alcohol by mass fraction of the dried leaves of the eucalyptus globulus tree of the genus Eucalyptus in the Myrtaceae family at a ratio of 1 g:10 mL of eucalyptus leaves to alcohol.

5. The preparation process of the antibacterial PVA material according to claim 2, characterized in that: The ultrasonic dispersion time is 10-15 minutes; the stirring time is 24-26 hours; the temperature of the temperature-controlled drying is 55-60° C., and the time is 8-10 hours.

6. The preparation process of the antibacterial PVA material according to claim 1, characterized in that: Step S3 specifically comprises: mixing sepiolite B and the base liquid uniformly and firstly ultrasonicating and then homogenizing, adding diatomaceous earth, blending material and dispersant and magnetically stirring to obtain a PVA spinning solution.

7. The preparation process of the antibacterial PVA material according to claim 6, characterized in that: The mass ratio of the sepiolite B, the base liquid, the diatomaceous earth, the blend and the dispersant is 0.8-1:20-22:0.75-0.85:0.5-0.8:0.5-0.

7.

8. The preparation process of the antibacterial PVA material according to claim 1, characterized in that: Step S4 is specifically as follows: PVA fiber is prepared by spinning the PVA solution under the conditions of spinneret hole diameter of 0.8-2mm, spinning temperature of 80-90°C, hot air temperature of 120-150°C, annular blowing, and hot air drawing multiple of the fiber of 2-5 times.

9. The preparation process of the antibacterial PVA material according to claim 1, characterized in that: Step S5 specifically includes: randomly arranging the PVA fibers on a hot roller to form thermal bonds under the action of a hot air flow, and then performing a hydroformylation bath treatment to obtain a finished antibacterial PVA material.

10. A PVA material prepared by the preparation process of the antibacterial PVA material according to any one of claims 1 to 9.