Antibacterial odor-removing nursing core material and production process thereof

Abstract

The invention discloses an antibacterial odor-removing nursing core material and a production process thereof, and belongs to the technical field of nursing materials, the antibacterial odor-removing nursing core material comprises the following raw materials by weight: 50 parts of super absorbent fibers, 10-15 parts of antibacterial odor-removing particles and 40-50 parts of viscose fibers; the antibacterial odor-removing nursing core material is prepared by the following steps: adding superabsorbent fibers, antibacterial odor-removing particles and viscose fibers into an air laying machine according to a weight part ratio, carrying out air laying, then carrying out needling reinforcement, and discharging to obtain the antibacterial odor-removing nursing core material, the antibacterial and odor-removing nursing core material prepared by the preparation method disclosed by the invention takes the super-absorbent fibers and the viscose fibers as main raw materials, so that the nursing core material can efficiently absorb liquid and keep a stable structure after absorbing the liquid, and the antibacterial and odor-removing particles are uniformly distributed in the nursing core material through an air laying process, so that the functions of the antibacterial and odor-removing particles are fully played; the antibacterial and odor-removing effects of the nursing core material are obviously improved.

Description

Technical Field

[0001] The invention belongs to the technical field of nursing products, and in particular relates to an antibacterial and odor-removing nursing core material and a production process thereof. Background Art

[0002] Nursing products are usually composed of a surface layer, a guide layer, a coating layer, an absorbent core and a back layer. The nursing core material should have the characteristics of fast and uniform liquid absorption, large liquid storage capacity and flat structure after liquid absorption. Existing water-absorbent resin SAP particles have the advantage of large liquid absorption, but they are prone to gel agglomeration after liquid absorption, resulting in unevenness and affecting further liquid absorption capacity; at the same time, water-absorbent resin SAP particles are not antibacterial, and are prone to breed bacteria and produce odor after liquid absorption. Especially in adult care products, due to the large amount of adult excretion and the low frequency of changing care products, it is very easy to produce odor, so there is a higher demand for products with antibacterial and deodorizing functions.

[0003] Therefore, how to prepare a care core material with both antibacterial and deodorizing functions is a technical problem that needs to be solved at present. Summary of the invention

[0004] The object of the present invention is to provide an antibacterial and deodorizing care core material and a production process thereof, so as to solve the problems in the background technology.

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

[0006] An antibacterial and odor-removing care core material comprises the following raw materials in parts by weight:

[0007] 50 parts of super absorbent fiber, 10-15 parts of antibacterial and deodorizing particles and 40-50 parts of viscose fiber; the antibacterial and deodorizing particles are prepared by the following steps:

[0008] Step S1, adding the pretreated corn cob into deionized water and stirring to mix, then adding 2-azaadamantane-N-oxyl and sodium bromide and continuing to stir, adding sodium hypochlorite solution after mixing evenly, stirring and reacting at room temperature for 4 hours, using 2 mol / L sodium hydroxide solution to maintain the pH of the reaction system at 10 during the reaction, then washing with anhydrous ethanol to neutrality and drying in a vacuum drying oven to obtain an oxidatively modified corn cob;

[0009] Step S2, adding the oxidized modified corn cob to a zinc nitrate hexahydrate methanol solution and soaking it for 2 hours, taking it out and washing it with methanol, then adding it to a 2-methylimidazole methanol solution and soaking it for 2 hours, taking it out and washing it again with methanol, and drying it in a vacuum drying oven at 80° C. for 5 hours to obtain a ZIF-8 loaded corn cob; the oxidized modified corn cob is easy to form a coordination bond with the metal ion, and then using 2-methylimidazole as an organic ligand, ZIF-8 with high porosity can be directly grown in situ on the surface and inside of the corn cob;

[0010] Step S3, adding ZIF-8 loaded corn cobs into ethanol aqueous solution and dispersing them evenly, then adding sodium borohydride solution and stirring and mixing until no bubbles are generated, then dropping silver nitrate solution while stirring, and after the addition is completed, stirring and reacting at room temperature for 1 hour, filtering and washing with anhydrous ethanol for 3 times, and vacuum drying at 50°C to obtain antibacterial and deodorizing particles.

[0011] Furthermore, the dosage ratio of the pretreated corn cob, deionized water, 2-azaadamantane-N-oxyl, sodium bromide and sodium hypochlorite solution is 5g:400mL:76.5-91.8mg:0.5-0.6g:110-130mL; the concentration of the sodium hypochlorite solution is 1.86mol / L.

[0012] Furthermore, the pretreated corn cob is prepared by the following steps:

[0013] Sodium chlorite and glacial acetic acid were added into deionized water and stirred to dissolve, and then corn cob particles were added, the temperature was raised to 80-90° C. and stirred to react for 3-4 hours, the particles were washed with deionized water until neutral, and dried in a drying oven at 50° C. to obtain pretreated corn cobs with lignin removed.

[0014] Furthermore, the dosage ratio of the sodium chlorite, glacial acetic acid, deionized water and corn cob particles is 7-8g:2.3-2.5mL:700-800mL:10g.

[0015] Furthermore, the corncob particles are the middle core layer of dry corncobs with a particle size of 80-100 meshes, and the middle core layer of corncobs contains more cellulose and less lignin, so that the cellulose can be fully utilized after pretreatment.

[0016] Furthermore, the dosage ratio of the oxidized modified corn cob, the hexahydrate zinc nitrate methanol solution and the 2-methylimidazole methanol solution is 3g:35-40mL:35-40mL; the concentration of the hexahydrate zinc nitrate methanol solution is 0.1mol / L; and the concentration of the 2-methylimidazole methanol solution is 0.8mol / L.

[0017] Furthermore, the dosage ratio of the ZIF-8 loaded corn cob, ethanol aqueous solution, sodium borohydride solution and silver nitrate solution is 2g:30-50mL:2-3mL:20-25mL; the mass ratio of ethanol to water in the ethanol aqueous solution is 4:1; the concentration of the sodium borohydride solution is 0.1mo / L; and the concentration of the silver nitrate solution is 5mmol / L.

[0018] Furthermore, the super absorbent fiber is a polyacrylate super absorbent fiber produced by Shandong Jiumian Textile Co., Ltd.

[0019] A production process of an antibacterial and deodorizing care core material comprises the following steps:

[0020] Super absorbent fiber, antibacterial and deodorizing particles and viscose fiber are added into an air-laying machine according to a weight ratio, air-laid at a speed of 2.5 m / min, and then needle-punched at a frequency of 180 punctures / min to obtain an antibacterial and deodorizing care core material after discharge.

[0021] Beneficial effects of the present invention:

[0022] The antibacterial and deodorizing care core material prepared by the present invention uses super absorbent fiber and viscose fiber as main raw materials. The super absorbent fiber plays the role of fast liquid absorption and liquid retention, is not easy to migrate in the core material, and the gel does not flow after absorbing liquid, so that the original structure can be kept intact; the viscose fiber can not only play the role of connection and mixing in the care core material, so that the care core material is fixed after absorbing liquid to maintain structural stability, but also can use capillary phenomenon to help liquid diffuse to other parts; the antibacterial and deodorizing particles can be evenly distributed in the care core material through the air-laid process, so as to give full play to the efficacy of the antibacterial and deodorizing particles;

[0023] The present invention uses dried corncob particles as a porous substrate, removes lignin in the corncob particles by pretreatment, thereby further increasing the proportion of cellulose or hemicellulose therein, and then exposes more active functional groups such as -OH and -COOH through oxidation modification to the corncob, thereby laying a foundation for subsequent loading of high-porosity ZIF-8, while increasing the binding strength and loading amount of the loaded ZIF-8; after the oxidatively modified corncob particles are loaded with ZIF-8, the loading amount and dispersibility of the nanosilver particles can be increased, thereby obtaining a care core material with excellent antibacterial and deodorizing effects;

[0024] The antibacterial and deodorizing particles prepared by the present invention can simultaneously perform antibacterial and adsorb and reduce odor, and have the advantages of safety and high efficiency. The antibacterial and deodorizing particles contain metal ions (Zn 2+ ), imidazole ligands and uniformly dispersed nanosilver particles, the three work synergistically to achieve the best antibacterial effect, thereby reducing the number of bacteria and enzymatic hydrolysis in urine, and reducing the decomposition of urea in urine into ammonium hydroxide; the pore structure in the antibacterial and deodorizing particles has excellent adsorption properties, which can adsorb part of the ammonium hydroxide and prevent the release of ammonia after the concentration of ammonium hydroxide increases, further reducing the release of odor, thereby achieving an excellent deodorizing effect. DETAILED DESCRIPTION

[0025] 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.

[0026] Example 1

[0027] This embodiment provides a pretreated corn cob, which is prepared by the following steps:

[0028] 7 g of sodium chlorite and 2.3 mL of glacial acetic acid were added to 700 mL of deionized water and stirred to dissolve. Then, 10 g of corn cob particles with a particle size of 80 mesh (the core layer of dry corn cobs) were added, the temperature was raised to 80° C. and stirred to react for 4 hours. The corn cobs were washed with deionized water until neutral, and dried in a drying oven at 50° C. to obtain pretreated corn cobs with lignin removed.

[0029] Example 2

[0030] This embodiment provides a pretreated corn cob, which is prepared by the following steps:

[0031] 7.5 g of sodium chlorite and 2.4 mL of glacial acetic acid were added to 750 mL of deionized water and stirred to dissolve. Then, 10 g of corn cob particles with a particle size of 90 mesh (the core layer of dry corn cobs) were added, the temperature was raised to 85° C. and stirred to react for 3.5 h. The corn cobs were washed with deionized water until neutral, and dried in a drying oven at 50° C. to obtain pretreated corn cobs with lignin removed.

[0032] Example 3

[0033] This embodiment provides a pretreated corn cob, which is prepared by the following steps:

[0034] 8 g of sodium chlorite and 2.5 mL of glacial acetic acid were added to 800 mL of deionized water and stirred to dissolve. Then, 10 g of corn cob particles with a particle size of 100 mesh (the core layer of dry corn cobs) were added, the temperature was raised to 90° C. and stirred to react for 3 h. The corn cobs were washed with deionized water until neutral, and dried in a drying oven at 50° C. to obtain pretreated corn cobs with lignin removed.

[0035] Example 4

[0036] This embodiment provides an antibacterial and deodorizing particle, which is prepared by the following steps:

[0037] Step S1, adding 5 g of the pretreated corn cob obtained in Example 1 to 400 mL of deionized water and stirring to mix, then adding 76.5 mg of 2-azaadamantane-N-oxyl and 0.5 g of sodium bromide and continuing to stir, and after mixing evenly, adding 110 mL of a 1.86 mol / L sodium hypochlorite solution, stirring and reacting at room temperature for 4 h, using a 2 mol / L sodium hydroxide solution to maintain the pH of the reaction system at 10 during the reaction, and then washing with anhydrous ethanol to neutrality and drying in a vacuum drying oven to obtain an oxidatively modified corn cob;

[0038] Step S2, adding 3 g of oxidized modified corn cob into 35 mL of 0.1 mol / L zinc nitrate hexahydrate methanol solution and soaking for 2 h, taking it out and washing it with methanol, then adding it into 35 mL of 0.8 mol / L 2-methylimidazole methanol solution and soaking it for 2 h, taking it out and washing it with methanol again, and drying it in a vacuum drying oven at 80° C. for 5 h to obtain ZIF-8 loaded corn cob;

[0039] Step S3, add 2g of ZIF-8 loaded corn cob into 30mL of ethanol aqueous solution and disperse evenly, then add 2mL of 0.1mol / L sodium borohydride solution and stir and mix until no bubbles are generated, then add 20mL of 5mmol / L silver nitrate solution dropwise while stirring, and continue to stir and react at room temperature for 1h after the addition is completed. After filtering, wash with anhydrous ethanol 3 times, and vacuum dry at 50°C to obtain antibacterial and deodorizing particles.

[0040] Example 5

[0041] This embodiment provides an antibacterial and deodorizing particle, which is prepared by the following steps:

[0042] Step S1, adding 5 g of the pretreated corn cob obtained in Example 2 to 400 mL of deionized water and stirring to mix, then adding 84.2 mg of 2-azaadamantane-N-oxyl and 0.55 g of sodium bromide and continuing to stir, and after mixing evenly, adding 120 mL of a 1.86 mol / L sodium hypochlorite solution, stirring and reacting at room temperature for 4 h, using a 2 mol / L sodium hydroxide solution to maintain the pH of the reaction system at 10 during the reaction, and then washing with anhydrous ethanol to neutrality and drying in a vacuum drying oven to obtain an oxidatively modified corn cob;

[0043] Step S2, adding 3 g of oxidized modified corn cob into 38 mL of 0.1 mol / L zinc nitrate hexahydrate methanol solution and soaking it for 2 h, taking it out and washing it with methanol, then adding it into 38 mL of 0.8 mol / L 2-methylimidazole methanol solution and soaking it for 2 h, taking it out and washing it with methanol again, and drying it in a vacuum drying oven at 80° C. for 5 h to obtain ZIF-8 loaded corn cob;

[0044] Step S3, add 2g of ZIF-8 loaded corn cob into 40mL of ethanol aqueous solution and disperse evenly, then add 2.5mL of 0.1mol / L sodium borohydride solution and stir and mix until no bubbles are generated, then add 22mL of 5mmol / L silver nitrate solution dropwise while stirring, and continue to stir and react at room temperature for 1h after the addition is completed. After filtering, wash with anhydrous ethanol 3 times, and vacuum dry at 50°C to obtain antibacterial and deodorizing particles.

[0045] Example 6

[0046] This embodiment provides an antibacterial and deodorizing particle, which is prepared by the following steps:

[0047] Step S1, adding 5 g of the pretreated corn cob prepared in Example 3 to 400 mL of deionized water, stirring and mixing, then adding 91.8 mg of 2-azaadamantane-N-oxyl and 0.6 g of sodium bromide and continuing to stir, adding 130 mL of a 1.86 mol / L sodium hypochlorite solution after mixing evenly, stirring and reacting at room temperature for 4 h, using a 2 mol / L sodium hydroxide solution to maintain the pH of the reaction system at 10 during the reaction, then washing with anhydrous ethanol to neutrality and drying in a vacuum drying oven to obtain an oxidatively modified corn cob;

[0048] Step S2, adding 3 g of oxidized modified corn cob into 40 mL of 0.1 mol / L zinc nitrate hexahydrate methanol solution and soaking it for 2 h, taking it out and washing it with methanol, then adding it into 40 mL of 0.8 mol / L 2-methylimidazole methanol solution and soaking it for 2 h, taking it out and washing it with methanol again, and drying it in a vacuum drying oven at 80° C. for 5 h to obtain ZIF-8 loaded corn cob;

[0049] Step S3, add 2g of ZIF-8 loaded corn cob into 50mL of ethanol aqueous solution and disperse evenly, then add 3mL of 0.1mol / L sodium borohydride solution and stir and mix until no bubbles are generated, then add 25mL of 5mmol / L silver nitrate solution dropwise while stirring, and continue to stir and react at room temperature for 1h after the addition is completed. After filtering, wash with anhydrous ethanol 3 times, and vacuum dry at 50°C to obtain antibacterial and deodorizing particles.

[0050] Comparative Example 1

[0051] The difference between this comparative example and Example 6 is that an equal amount of unpretreated corn cob particles are used to replace the pretreated corn cobs prepared in Example 3, and the other raw materials and steps are the same.

[0052] Comparative Example 2

[0053] The difference between this comparative example and Example 6 is that the oxidation modification operation of step S1 is not performed, and the pretreated corn cob is directly subjected to the operation of step S2, and the other raw materials and steps are the same.

[0054] Comparative Example 3

[0055] The difference between this comparative example and Example 6 is that the operation of loading nanosilver particles in step S3 is not performed, and the loaded ZIF-8 corn cobs are directly used as antibacterial and deodorizing particles, and the other raw materials and steps are the same.

[0056] Example 7

[0057] This embodiment provides an antibacterial and deodorizing care core material, which is produced by the following production process:

[0058] 50 parts by weight of super absorbent fiber, 10 parts by weight of antibacterial and deodorizing particles prepared in Example 4 and 40 parts by weight of viscose fiber are added into an air-laying machine, air-laid at a speed of 2.5 m / min, and then needle-punched at a frequency of 180 punctures / min to obtain an antibacterial and deodorizing care core material after discharge.

[0059] Example 8

[0060] This embodiment provides an antibacterial and deodorizing care core material, which is produced by the following production process:

[0061] 50 parts by weight of super absorbent fiber, 12 parts by weight of antibacterial and deodorizing particles prepared in Example 5 and 45 parts by weight of viscose fiber are added into an air-laying machine, air-laid at a speed of 2.5 m / min, and then needle-punched at a frequency of 180 punctures / min to obtain an antibacterial and deodorizing care core material after discharge.

[0062] Example 9

[0063] This embodiment provides an antibacterial and deodorizing care core material, which is produced by the following production process:

[0064] 50 parts by weight of super absorbent fiber, 15 parts by weight of antibacterial and deodorizing particles prepared in Example 6 and 50 parts by weight of viscose fiber are added into an air-laying machine, air-laid at a speed of 2.5 m / min, and then needle-punched at a frequency of 180 punctures / min to obtain an antibacterial and deodorizing care core material after discharge.

[0065] Comparative Example 4

[0066] The difference between this comparative example and Example 9 is that the antibacterial and deodorizing particles prepared in Comparative Example 1 are used to replace the antibacterial and deodorizing particles prepared in Example 6 in equal amounts, and the other raw materials and steps are the same.

[0067] Comparative Example 5

[0068] The difference between this comparative example and Example 9 is that the antibacterial and deodorizing particles prepared in Comparative Example 2 are used to replace the antibacterial and deodorizing particles prepared in Example 6 in equal amounts, and the other raw materials and steps are the same.

[0069] Comparative Example 6

[0070] The difference between this comparative example and Example 9 is that the antibacterial and deodorizing particles prepared in Comparative Example 3 are used to replace the antibacterial and deodorizing particles prepared in Example 6 in equal amounts, and the other raw materials and steps are the same.

[0071] Performance tests were conducted on Examples 7 to 9 and Comparative Examples 4 to 6. The antibacterial properties of the care core material samples were tested according to GB / T20944.3-2008 standard. The test bacteria were Gram-negative bacteria - Escherichia coli and Gram-positive bacteria - Staphylococcus aureus. Each group of care core materials was cut into 10 cm × 50 cm samples, and then placed in an airbag, and then 500 ppm ammonia was blown into the airbag and sealed. After 2 hours, the concentration of ammonia in the airbag was measured using a gas detection tube. The test results are shown in Table 1:

[0072] Table 1

[0073]

[0074]

[0075] It can be seen from the data in Table 1 that the care core material prepared by the present invention has more excellent antibacterial and deodorizing properties.

[0076] 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.

[0077] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An antibacterial and deodorizing care core material, characterized in that: It includes the following raw materials in parts by weight: 50 parts of super absorbent fiber, 10-15 parts of antibacterial and deodorizing particles and 40-50 parts of viscose fiber; the antibacterial and deodorizing particles are prepared by the following steps: Step S1, adding the pretreated corn cob into deionized water and stirring to mix, then adding 2-azaadamantane-N-oxyl and sodium bromide and continuing to stir, adding sodium hypochlorite solution after mixing evenly, stirring and reacting at room temperature for 4 hours, maintaining the pH of the reaction system at 10 during the reaction, washing and drying to obtain oxidatively modified corn cob; Step S2, soaking the oxidized modified corncob in a zinc nitrate hexahydrate methanol solution, taking it out and washing it with methanol, then soaking it in a 2-methylimidazole methanol solution, taking it out and washing it again with methanol, and vacuum drying it to obtain a ZIF-8 loaded corncob; Step S3, adding ZIF-8 loaded corn cobs into ethanol aqueous solution and dispersing them evenly, then adding sodium borohydride solution and stirring and mixing until no bubbles are generated, then dropping silver nitrate solution while stirring, and after the addition is completed, stirring and reacting at room temperature for 1 hour, filtering, washing, and vacuum drying to obtain antibacterial and deodorizing particles.

2. The antibacterial and deodorizing care core material according to claim 1, characterized in that: The dosage ratio of the pretreated corn cob, deionized water, 2-azaadamantane-N-oxyl, sodium bromide and sodium hypochlorite solution is 5g:400mL:76.5-91.8mg:0.5-0.6g:110-130mL; the concentration of the sodium hypochlorite solution is 1.86mol / L.

3. The antibacterial and deodorizing care core material according to claim 1, characterized in that: The pretreated corncob is prepared by the following steps: Sodium chlorite and glacial acetic acid were added into deionized water and stirred to dissolve, then corn cob particles were added, the temperature was raised to 80-90° C. and stirred to react for 3-4 hours, the mixture was washed with deionized water until neutral, and dried in a drying oven at 50° C. to obtain pretreated corn cobs.

4. The antibacterial and deodorizing care core material according to claim 3, characterized in that: The dosage ratio of the sodium chlorite, glacial acetic acid, deionized water and corn cob particles is 7-8g:2.3-2.5mL:700-800mL:10g.

5. The antibacterial and deodorizing care core material according to claim 3, characterized in that: The corncob particles are the core layer of dry corncobs with a particle size of 80-100 meshes.

6. The antibacterial and deodorizing care core material according to claim 1, characterized in that: The dosage ratio of the oxidized modified corn cob, the hexahydrate zinc nitrate methanol solution and the 2-methylimidazole methanol solution is 3g:35-40mL:35-40mL; the concentration of the hexahydrate zinc nitrate methanol solution is 0.1mol / L; the concentration of the 2-methylimidazole methanol solution is 0.8mol / L.

7. The antibacterial and deodorizing care core material according to claim 1, characterized in that: The dosage ratio of the ZIF-8 loaded corn cob, ethanol aqueous solution, sodium borohydride solution and silver nitrate solution is 2g:30-50mL:2-3mL:20-25mL; the mass ratio of ethanol to water in the ethanol aqueous solution is 4:1; the concentration of the sodium borohydride solution is 0.1mo / L; and the concentration of the silver nitrate solution is 5mmol / L.

8. The antibacterial and deodorizing care core material according to claim 1, characterized in that: The super absorbent fiber is a polyacrylate super absorbent fiber.

9. The production process of the antibacterial and deodorizing care core material according to claim 1, characterized in that: The following steps are involved: The super absorbent fiber, antibacterial and deodorizing particles and viscose fiber are added into an air-laying machine according to a weight ratio for air-laying, and then needle-punched and reinforced, and the antibacterial and deodorizing care core material is obtained after the material is discharged.

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