CN112830486B - Te nanowire active carbon fiber material with piezoelectricity, and preparation method and application thereof - Google Patents

Te nanowire active carbon fiber material with piezoelectricity, and preparation method and application thereof Download PDF

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CN112830486B
CN112830486B CN202110138309.7A CN202110138309A CN112830486B CN 112830486 B CN112830486 B CN 112830486B CN 202110138309 A CN202110138309 A CN 202110138309A CN 112830486 B CN112830486 B CN 112830486B
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nanowire
carbon fiber
activated carbon
fiber material
insole
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CN112830486A (en
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夏德华
李智耀
麻丁仁
何春
罗蔓慧
郑溪源
刘威奇
关心怡
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Sun Yat Sen University
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/312—Preparation
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/02—Sulfur; Selenium; Tellurium; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B19/00—Selenium; Tellurium; Compounds thereof
    • C01B19/02—Elemental selenium or tellurium
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/51—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof
    • D06M11/52—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof with selenium, tellurium, polonium or their compounds; with sulfur, dithionites or compounds containing sulfur and halogens, with or without oxygen; by sulfohalogenation with chlorosulfonic acid; by sulfohalogenation with a mixture of sulfur dioxide and free halogens
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
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    • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/40—Fibres of carbon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Abstract

The invention belongs to the technical field of new nano materials, and particularly relates to a Te nanowire activated carbon fiber material with piezoelectricity, and a preparation method and application thereof. The semi-metal Te of the material has a nanowire structure on the microcosmic aspect, and when mechanical vibration stimulation is generated, more electrons can be generated and offset after deformation, the Te nanowire is catalyzed to generate free radicals, and the material has a remarkable killing effect on bacteria and fungi; the material has larger specific surface area, and can adsorb odor or peculiar smell; meanwhile, the method has the advantages of simple synthesis, no toxicity, harmlessness, environmental protection, high efficiency and the like, and has wide application prospect. The antibacterial insole is loaded in the insole, has a 70-99% bactericidal effect on bacteria and fungi, has a remarkable effect, can deodorize and prevent mildew, and has a remarkable prevention and treatment effect on microorganism infection diseases such as dermatophytosis.

Description

Te nanowire active carbon fiber material with piezoelectricity, and preparation method and application thereof
Technical Field
The invention belongs to the technical field of semi-metal nano piezoelectric composite materials. More particularly, relates to a Te nanowire activated carbon fiber material with piezoelectricity, a preparation method and application thereof.
Background
Piezoelectric material refers to a material that can accumulate electrical charge due to mechanical stress in some non-centrosymmetric structures of solid material. Piezoelectric materials are extremely sensitive to mechanical vibrations, and even water flow, muscle movement and respiration can cause electrical charges; with the ability to convert mechanical stimuli to electrical signals, or vice versa. The piezoelectric material comprises piezoelectric single crystals, polycrystalline piezoelectric ceramics, high-molecular piezoelectric materials, polymer-piezoelectric ceramic composite materials and the like, can be applied to the fields of pressure cavity oscillators, piezoelectric transducers, biological materials and the like, and has narrow application field.
Infectious skin diseases caused by microorganisms, such as beriberi, have high morbidity in various countries in the world, and the incidence rate of adults in cities in China can reach more than 60 percent. The infectious dermatosis occurs on the palmar surface of the toes, and the disease causes are invasion of epidermophyton, trichophyton or trichophyton toenails, and the thick of plantar cuticle, the lack of sebum, rich sweat glands and moist feet, which are beneficial to growth and reproduction of moulds. Therefore, daily hygiene and prevention are important. The shoe pad sold in the market at present comprises an active carbon deodorization shoe pad, an antibacterial shoe pad and the like, wherein the active carbon shoe pad has strong adsorption capacity to odor due to the extremely large specific surface area, but has poor antibacterial property, so that the problem of shoe pad bacterial breeding cannot be fundamentally solved; antibacterial insoles such as silver-doped antibacterial insoles have the effect of inhibiting bacteria on soles of feet, but have only the antibacterial effect and lack the function of adsorbing odor of the insoles, and are high in cost and not suitable for industrialization. Chinese patent application CN111109762A discloses a Chinese herbal medicine bacteriostatic insole with asymmetric humidity control, wherein a bottom fabric of the insole can absorb water vapor, a foaming layer is active carbon and the like, and a surface fabric is a Chinese herbal medicine knitted fabric, and the top fabric and the surface fabric are mutually combined and have the functions of inhibiting bacteria and fungi on feet; but the bacteriostatic and bactericidal effects still cannot meet the daily requirements of people, and the Chinese herbal medicines are expensive and have higher production cost.
Disclosure of Invention
The invention aims to solve the technical problems that the existing insole material cannot well meet the requirements of bacteriostasis, sterilization and deodorization at the same time, and the application range of the piezoelectric material is narrow, and provides a Te nanowire active carbon fiber material with piezoelectricity, which can absorb water vapor and odor in shoes and has the effects of sterilization and bacteriostasis.
The invention aims to provide a preparation method of a Te nanowire activated carbon fiber material with piezoelectricity.
The invention also aims to provide the Te nanowire activated carbon fiber material with piezoelectricity prepared by the method.
The invention also aims to provide the application of the Te nanowire activated carbon fiber material with piezoelectricity in the fields of sterilization and bacteriostasis.
The invention also aims to provide the piezoelectric bacteriostatic insole.
The above purpose of the invention is realized by the following technical scheme:
a preparation method of a Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, dissolving activated carbon fiber, sodium tellurite and a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) into water, gradually adding a reducing agent under the stirring condition, adjusting the pH value, uniformly stirring, and carrying out hydrothermal synthesis reaction at 140-180 ℃ to obtain a reaction solution;
and S2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging, washing the precipitate to be neutral, drying and grinding to obtain the Te nanowire activated carbon fiber material.
Preferably, in step S1, the temperature of the hydrothermal synthesis reaction is 160 ℃.
In step S1, the mass ratio of the sodium tellurite to the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is 1 (1-3). The inventor creatively discovers that the preparation within the condition range can ensure that the simple substance Te formed by reduction extends into a line along the 001 direction to form a Te nano-wire, thereby achieving good piezoelectric catalytic sterilization effect. Preferably, the mass ratio of the sodium tellurite to the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is 1.
Furthermore, in the step S2, the mass ratio of the Te nanowire to the activated carbon fiber in the obtained Te nanowire activated carbon fiber material is 1 (0.5-2). Preferably, the mass ratio of the Te nanowires to the activated carbon fibers is 1.
Further, in step S1, the reducing agent is sodium borohydride.
Furthermore, in step S1, the mass ratio of the sodium tellurite to the reducing agent is 1 (0.005-0.05).
Further, in the step S1, the concentration of the sodium tellurite dissolved in the water is 5-10 mg/mL. When the tellurium salt is added, the concentration of the added tellurium salt is controlled, so that the reaction can be fully performed to form simple substance Te, if the concentration is too high, the reaction can not be fully performed to form simple substance Te, and if the concentration is too low, the yield of the product in time can be influenced.
Further, in step S1, the pH is 12 to 13.
Further, in step S1, the reagent for adjusting pH is an aqueous ammonia solution of 25 to 28%.
Further, in step S1, the volume ratio of the aqueous ammonia solution to the aqueous solution is 1.
Further, in step S1, the hydrothermal synthesis reaction time is 8 to 12 hours. Preferably, the hydrothermal synthesis reaction time is 10h.
Further, in the step S2, the centrifugation is 8000-10000 rpm/min for 5-30 min. The drying temperature is 55-85 ℃, and the drying time is more than 24 h.
In addition, the invention also provides the Te nanowire activated carbon fiber material with piezoelectricity, which is obtained by the preparation method.
Researches show that semimetal Te in the piezoelectric Te nanowire activated carbon fiber material has a nanowire structure on a microscopic scale, and when mechanical vibration is stimulated, the material is easy to deform, can generate more electrons and generate deflection after deformation, catalyzes the Te nanowire to generate free radicals, and has a remarkable killing effect on bacteria and fungi; the material has larger specific surface area and can adsorb odor or peculiar smell; meanwhile, the method has the advantages of simple synthesis, no toxicity, harmlessness, environmental protection, high efficiency and the like, and has wide application prospect.
In addition, the invention also provides application of the Te nanowire activated carbon fiber material with piezoelectricity in the fields of sterilization and bacteriostasis.
Preferably, the bacteria include bacteria, fungi, the bacteria can be escherichia coli, staphylococcus aureus, pseudomonas aeruginosa, the fungi can be aspergillus niger, sphagnum rubrum, sphagnum gypseum, sphagnum floccosum and the like.
Furthermore, the Te nanowire activated carbon fiber material with piezoelectricity can be applied to the fields of treatment of wastewater containing a large amount of pathogenic bacteria, such as medical wastewater and the like.
In addition, the invention also provides a piezoelectric bacteriostatic insole which comprises the piezoelectric Te nanowire activated carbon fiber material.
The inventor creatively loads the piezoelectric Te nanowire activated carbon fiber material into the insole, when a user wears the insole to walk, the generated mechanical vibration stimulates the piezoelectric Te nanowire activated carbon fiber material to generate a piezoelectric effect, extra shielding charges are released from the surface of the piezoelectric Te nanowire activated carbon fiber material and are dispersed to the surface of the insole to form free charges, the free charges are combined with water molecules in shoes to generate active substances, such as superoxide radical, hydroxyl radical, hydrogen peroxide and the like, bacteria and fungi are killed, the sterilization effect can reach 70-99%, and the shoe insole has the effects of sterilization, bacteriostasis, deodorization and mildew prevention.
Furthermore, the usage amount of the Te nanowire active carbon fiber material with piezoelectricity is 2-10 mg/cm of each piezoelectric bacteriostatic insole 2 . Preferably, the usage amount of the Te nanowire activated carbon fiber material with piezoelectric property is 2mg/cm for each piezoelectric bacteriostatic insole 2 、5mg/cm 2 Or 10mg/cm 2 . More preferably, the usage amount of the Te nanowire activated carbon fiber material with piezoelectric property is 5mg/cm for each piezoelectric bacteriostatic insole 2 。
Furthermore, the base material of the insole can be knitted or woven pure cotton, polyester cotton cloth, bamboo or straw woven structure, loofah sponge and the like. The Te nanowire active carbon fiber material with piezoelectricity can be directly coated on the substrate material, and can also be adhered by adopting a conventional adhesive.
In addition, the invention also provides a preparation method of the piezoelectric bacteriostatic insole, which comprises the following steps:
s3, uniformly dispersing the Te nanowire activated carbon fiber material with piezoelectricity in the aqueous solution, uniformly coating the Te nanowire activated carbon fiber material on the non-woven fabric insole fabric to form a sterilization layer, and drying the insole for 24 hours at 65 ℃ to obtain the nano-composite material.
The invention has the following beneficial effects:
(1) The semimetal Te of the piezoelectric Te nanowire activated carbon fiber material has a nanowire structure on a microscopic scale, and when the material is stimulated by mechanical vibration, more electrons can be generated and offset after deformation, so that the Te nanowire is catalyzed to generate free radicals, and the material has a remarkable killing effect on bacteria and fungi; the material has larger specific surface area, and can adsorb odor or peculiar smell; meanwhile, the method has the advantages of simple synthesis, no toxicity, harmlessness, environmental protection, high efficiency and the like, and has wide application prospect.
(2) The piezoelectric Te nanowire activated carbon fiber material is creatively loaded in the insole, active substances such as free radicals and the like can be generated by utilizing mechanical vibration generated during walking and water vapor in shoes, bacteria and fungi can be killed, the sterilization effect can reach 70-99%, the effect is remarkable, and meanwhile, the material can also deodorize and prevent mildew, and has a remarkable prevention and treatment effect on microorganism infection diseases such as dermatophytosis and the like.
Drawings
FIG. 1 is an X-ray diffraction pattern of an XRD test of the materials of steps S1, S2 of example 1.
Fig. 2 is a scanning electron microscope SEM image of the Te nanowire activated carbon fiber material (Te/ACF) obtained in step S2 of example 1, the Activated Carbon Fiber (ACF) of comparative example 2, and the Te nanowire material of comparative example 3.
FIG. 3 is SEM images of different loading Te nanowire activated carbon fiber materials (Te/ACF) obtained in step S2 of examples 1-3.
Fig. 4 is a Mapping diagram of the Te nanowire activated carbon fiber material obtained in step S2 of example 1.
Fig. 5 is an EDS diagram of the Te nanowire activated carbon fiber material obtained in step S2 of example 1.
FIG. 6 shows DMPO-O of the Te nanowire activated carbon fiber material obtained in step S2 of example 1 under the piezoelectric effect 2 - ESR spectrum of complex.
FIG. 7 is a graph showing the bactericidal (E.coli) effect of example 1, comparative examples 1 to 3, and a blank insole by generating a piezoelectric effect by mechanical vibration.
FIG. 8 is a plate diagram of E.coli culture in the measurement of bactericidal activity; the left panel is a control group without mechanical vibration when the Te nanowire-added activated carbon fiber material is not moved, and the right panel is a panel culture result which generates a piezoelectric sterilization effect after the Te nanowire-added activated carbon fiber material is moved.
FIG. 9 is an SEM photograph showing that Escherichia coli was killed in the bactericidal performance measurement.
FIG. 10 is a diagram showing the sterilization mechanism of the insole in example 1.
Detailed Description
The invention is further described with reference to the drawings and specific examples, which are not intended to limit the invention in any way. The reagents, methods and apparatus employed in the present invention are conventional in the art, except as otherwise indicated.
Unless otherwise indicated, reagents and materials used in the following examples are commercially available.
Example 1 preparation of insole from piezoelectric Te nanowire activated carbon fiber Material
The method for preparing the insole by using the Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, mixing activated carbon fiber and sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) of polyethylene oxide-polypropylene oxide-polyethylene oxide into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) Adjusting the pH value of the solution to 12 by using an ammonia water solution with the concentration of 25-28%, wherein the volume ratio of the ammonia water solution to the water solution is 1Transferring the combined solution into a hydrothermal reaction kettle with a polytetrafluoroethylene lining, and carrying out hydrothermal synthesis reaction for 10 hours at 160 ℃ to obtain a reaction solution;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percentage of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain the piezoelectric Te nanowire activated carbon fiber material, wherein the mass ratio of the Te nanowire to the activated carbon fiber is 1;
s3, uniformly dispersing the Te nanowire activated carbon fiber material with piezoelectricity obtained in the step S2 into an aqueous solution, uniformly coating the Te nanowire activated carbon fiber material with piezoelectricity on a non-woven fabric insole fabric to form a sterilization layer, wherein the usage amount of the Te nanowire activated carbon fiber material with piezoelectricity is 5.0mg/cm for each piezoelectric bacteriostatic insole 2 Drying the insole at 65 ℃ for 24 hours to obtain the insole.
Example 2 preparation of insole from piezoelectric Te nanowire activated carbon fiber Material
The method for preparing the insole by using the Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, mixing activated carbon fiber and sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) of polyethylene oxide-polypropylene oxide-polyethylene oxide into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) Adjusting the pH value of the solution to 12 by using an ammonia water solution with the concentration of 25-28%, wherein the volume ratio of the ammonia water solution to the water solution is 1;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percentage of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain the piezoelectric Te nanowire activated carbon fiber material, wherein the mass ratio of Te nanowires to activated carbon fibers is 1;
s3, uniformly dispersing the Te nanowire activated carbon fiber material with piezoelectricity obtained in the step S2 into an aqueous solution, uniformly coating the Te nanowire activated carbon fiber material with piezoelectricity on a non-woven fabric insole fabric to form a sterilization layer, wherein the usage amount of the Te nanowire activated carbon fiber material with piezoelectricity is 5.0mg/cm for each piezoelectric bacteriostatic insole 2 And drying the insole at 65 ℃ for 24 hours to obtain the insole.
Example 3 preparation of insole from Te nanowire activated carbon fiber Material having piezoelectric Properties
The method for preparing the insole by using the Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, mixing activated carbon fiber and sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) of polyethylene oxide-polypropylene oxide-polyethylene oxide into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) Adjusting the pH value of the solution to 12 by using an ammonia water solution with the concentration of 25-28%, wherein the volume ratio of the ammonia water solution to the water solution is 1;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percent of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain the piezoelectric Te nanowire activated carbon fiber material, wherein the mass ratio of Te nanowires to activated carbon fibers is 2;
s3, obtaining in the step S2The Te nanowire active carbon fiber material with piezoelectricity is uniformly dispersed in the water solution and is uniformly coated on the non-woven insole fabric to form a sterilization layer, and the using amount of the Te nanowire active carbon fiber material is 5.0mg/cm for each piezoelectric bacteriostatic insole 2 Drying the insole at 65 ℃ for 24 hours to obtain the insole.
Example 4 preparation of insole from Te nanowire activated carbon fiber Material having piezoelectric Properties
The method for preparing the insole by using the Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, mixing activated carbon fiber and sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) of polyethylene oxide-polypropylene oxide-polyethylene oxide into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) Adjusting the pH value of the solution to 12 by using an ammonia water solution with the concentration of 25-28%, wherein the volume ratio of the ammonia water solution to the water solution is 1;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percentage of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain the piezoelectric Te nanowire activated carbon fiber material, wherein the mass ratio of the Te nanowire to the activated carbon fiber is 1;
s3, uniformly dispersing the Te nanowire activated carbon fiber material with piezoelectricity obtained in the step S2 into an aqueous solution, uniformly coating the Te nanowire activated carbon fiber material with piezoelectricity on a non-woven fabric insole fabric to form a sterilization layer, wherein the usage amount of the Te nanowire activated carbon fiber material with piezoelectricity is 5.0mg/cm for each piezoelectric bacteriostatic insole 2 And drying the insole at 65 ℃ for 24 hours to obtain the insole.
Example 5 preparation of insole from Te nanowire activated carbon fiber Material having piezoelectric Properties
The method for preparing the insole by using the Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, mixing activated carbon fiber and sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) Adjusting the pH value of the solution to 13 by using an ammonia water solution with the concentration of 25-28%, wherein the volume ratio of the ammonia water solution to the water solution is 1;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percent of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain the piezoelectric Te nanowire activated carbon fiber material, wherein the mass ratio of the Te nanowire to the activated carbon fiber is 1;
s3, uniformly dispersing the Te nanowire activated carbon fiber material with piezoelectricity obtained in the step S2 in an aqueous solution, and uniformly coating the Te nanowire activated carbon fiber material with piezoelectricity on a non-woven fabric insole fabric to form a sterilization layer, wherein the usage amount of the Te nanowire activated carbon fiber material with piezoelectricity is 5.0mg/cm for each piezoelectric bacteriostatic insole 2 And drying the insole at 65 ℃ for 24 hours to obtain the insole.
Example 6 preparation of insoles from Te nanowire activated carbon fiber Material having piezoelectric Properties
The method for preparing the insole by using the Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, mixing activated carbon fiber and sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) of polyethylene oxide-polypropylene oxide-polyethylene oxide into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) The solution is prepared by using 25 to 28 percent ammonia water solutionAdjusting the pH to 12, wherein the volume ratio of the ammonia water solution to the aqueous solution is 1;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percentage of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain the piezoelectric Te nanowire activated carbon fiber material, wherein the mass ratio of the Te nanowire to the activated carbon fiber is 1;
s3, uniformly dispersing the Te nanowire activated carbon fiber material with piezoelectricity obtained in the step S2 in an aqueous solution, and uniformly coating the Te nanowire activated carbon fiber material with piezoelectricity on a non-woven fabric insole fabric to form a sterilization layer, wherein the usage amount of the Te nanowire activated carbon fiber material with piezoelectricity is 5.0mg/cm for each piezoelectric bacteriostatic insole 2 And drying the insole at 65 ℃ for 24 hours to obtain the insole.
Example 7 preparation of insole from Te nanowire activated carbon fiber Material having piezoelectric Properties
The method for preparing the insole by using the Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, mixing activated carbon fiber and sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) Adjusting the pH value of the solution to 12 by using an ammonia water solution with the concentration of 25-28%, wherein the volume ratio of the ammonia water solution to the water solution is 1;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percentage of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain the piezoelectric Te nanowire activated carbon fiber material, wherein the mass ratio of Te nanowires to activated carbon fibers is 1;
s3, uniformly dispersing the Te nanowire activated carbon fiber material with piezoelectricity obtained in the step S2 into an aqueous solution, uniformly coating the Te nanowire activated carbon fiber material with piezoelectricity on a non-woven fabric insole fabric to form a sterilization layer, wherein the usage amount of the Te nanowire activated carbon fiber material with piezoelectricity is 5.0mg/cm for each piezoelectric bacteriostatic insole 2 Drying the insole at 65 ℃ for 24 hours to obtain the insole.
Example 8 preparation of insole from Te nanowire activated carbon fiber Material having piezoelectric Properties
The method for preparing the insole by using the Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, mixing activated carbon fiber and sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) of polyethylene oxide-polypropylene oxide-polyethylene oxide into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) Adjusting the pH value of the solution to 12 by using an ammonia water solution with the concentration of 25-28%, wherein the volume ratio of the ammonia water solution to the water solution is 1;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percentage of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain the piezoelectric Te nanowire activated carbon fiber material, wherein the mass ratio of Te nanowires to activated carbon fibers is 1;
s3, uniformly dispersing the Te nanowire activated carbon fiber material with piezoelectricity obtained in the step S2 in an aqueous solution, and uniformly coating the Te nanowire activated carbon fiber material with piezoelectricity on a non-woven fabric insole fabric to form a sterilization layer, wherein the usage amount of the Te nanowire activated carbon fiber material with piezoelectricity is 2.0mg/cm for each piezoelectric bacteriostatic insole 2 And drying the insole at 65 ℃ for 24 hours to obtain the insole.
Example 9 preparation of insoles made of Te nanowire activated carbon fiber Material having piezoelectric Properties
The method for preparing the insole by using the Te nanowire activated carbon fiber material with piezoelectricity comprises the following steps:
s1, mixing activated carbon fiber and sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) Adjusting the pH value of the solution to 12 by using an ammonia water solution with the concentration of 25-28%, wherein the volume ratio of the ammonia water solution to the water solution is 1;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percentage of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain the piezoelectric Te nanowire activated carbon fiber material, wherein the mass ratio of Te nanowires to activated carbon fibers is 1;
s3, uniformly dispersing the Te nanowire activated carbon fiber material with piezoelectricity obtained in the step S2 in an aqueous solution, and uniformly coating the Te nanowire activated carbon fiber material with piezoelectricity on a non-woven fabric insole fabric to form a sterilization layer, wherein the usage amount of the Te nanowire activated carbon fiber material with piezoelectricity is 10.0mg/cm for each piezoelectric bacteriostatic insole 2 Drying the insole at 65 ℃ for 24 hours to obtain the insole.
Comparative example 1 insole
The difference from the embodiment 1 is that the non-woven fabric insole fabric of the comparative example 1 is made into a non-woven fabric insole without adding a Te nanowire active carbon fiber material with piezoelectricity.
Comparative example 2 insole
The difference from the example 1 is that the insole fabric of the comparative example 2 replaces the Te nanowire activated carbon fiber material with piezoelectricity with activated carbon fiber to prepare the non-woven insole. The preparation method comprises the following steps:
uniformly dispersing activated carbon fiber in water solution, and uniformly coating on non-woven insole fabric, wherein the usage amount of the activated carbon fiber is 5.0mg/cm for each piezoelectric antibacterial insole 2 And drying the insole at 65 ℃ for 24 hours to obtain the insole.
Comparative example 3 insole
The difference from the embodiment 1 is that the insole fabric of the comparative example 3 replaces the Te nanowire activated carbon fiber material with piezoelectric Te nanowire material to prepare a non-woven insole. The preparation method comprises the following steps:
s1, adding sodium tellurite (Na) 2 TeO 3 ) Dissolving the triblock copolymer (P123) of polyethylene oxide-polypropylene oxide-polyethylene oxide into water, and gradually adding reducing agent sodium borohydride (NaBH) under stirring 4 ) Adjusting the pH value of the solution to 12 by using an ammonia water solution with the concentration of 25-28%, wherein the volume ratio of the ammonia water solution to the water solution is 1;
wherein the concentration of the sodium tellurite is 5.0mg/mL, and the mass ratio of the sodium tellurite to the P123 is 1; the mass percent of the sodium borohydride solution is 80%, the mass ratio of the sodium tellurite to the sodium borohydride is 1;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging at 8000rpm/min for 10min, discarding supernatant, washing the precipitate with ethanol and ultrapure water to neutrality, drying at 55-85 ℃ for 24h, and grinding to obtain a Te nanowire material;
s3, obtaining in the step S2The Te nanowire material is uniformly dispersed in the water solution and uniformly coated on the non-woven fabric insole fabric to form a sterilization layer, and the usage amount of the Te nanowire material is 5.0mg/cm for each piezoelectric antibacterial insole 2 And drying the insole at 65 ℃ for 24 hours to obtain the insole.
Test examples Property measurement
1. XRD test
XRD testing was performed on the materials of example 1, steps S1, S2, and the results are shown in fig. 1. As can be seen from the figure, the Te nanowire active carbon fiber material can be prepared by hydrothermal synthesis reaction.
2. SEM detection
Scanning electron microscope SEM examination was performed on the Te nanowire activated carbon fiber material (Te/ACF) obtained in step S2 of example 1, the Activated Carbon Fiber (ACF) of comparative example 2, and the Te nanowire material of comparative example 3, and the results were shown in fig. 2. As can be seen from the figure, the nano structure of the Te nanowire activated carbon fiber material obtained in step S2 of example 1 is a smooth-surfaced, long, thin, uniform and ultrafine nanowire structure, and the Te nanowire can be grown in situ on the activated carbon fiber in the hydrothermal process.
Scanning electron microscope SEM detection is carried out on the Te nanowire activated carbon fiber material (Te/ACF) obtained in the step S2 of the embodiment 1 to 3, and the result is shown in figure 3. It can be seen from the figure that with the change of the adding amount of the activated carbon fiber, te nanowire activated carbon fiber materials with different mass ratios can be obtained.
3. Mapping chart
Mapping graph determination is carried out on the Te nanowire activated carbon fiber material obtained in the step S2 of the example 1, and the result is shown in figure 4. As can be seen from the figure, the material is composed of two elements of C and Te, the elements of C and Te are uniformly distributed in Mapping graph, and the shape of Te nanowire can be seen in the graph.
4. EDS diagram
EDS chart measurement is performed on the Te nanowire activated carbon fiber material obtained in the step S2 of the example 1, and the result is shown in figure 5. As can be seen, except for the elements contained in the gold spraying treatment and the sample stage, the Te and C elements contained in the material can be seen.
5. ESR superoxide radical trapping
By usingThe dimethyl sulfoxide solution of DMPO carries out a free radical capture experiment on the Te nanowire activated carbon fiber material obtained in the step S2 of the embodiment 1, and the reaction principle is that DMPO can capture superoxide radical generated in the catalytic process and quickly generates DMPO-O 2 - Complex, superoxide radical capture corresponds to an ESR spectrum with quadruple characteristic peaks in approximate proportions of 1. As can be seen from the figure, the Te nano-wire can generate free charge under the piezoelectric action so as to activate oxygen into superoxide radical.
6. Measurement of Sterilization and deodorization Performance
(1) Measurement of fungicidal Property
The insoles prepared in the examples 1 to 9 and the comparative examples 1 to 3 were worn normally and walked for 3 days, the number of steps counted when the insole for each experiment was worn was controlled to be the same, then the insole was cut into pieces, placed in a beaker, the insole was rinsed with 200mL of sterile water and diluted with microorganisms on the insole at the same time by a dilution factor of 10000 times, the diluted suspension was uniformly applied to a Luria Bertani solid medium, cultured for 12 hours under a constant temperature sterile culture condition of 37 ℃, and the number of colonies was calculated. Blank control was also set: example 1 the insole was worn normally but not walking, and the other measurements were the same.
Taking example 1, comparative examples 1-3 and blank control as examples, the data were collated to give FIGS. 7-9, and the other data are shown in Table 1.
As can be seen from fig. 7, comparative example 1 containing no Te nanowire activated carbon fiber material (non-woven fabric + mechanical vibration) or a blank control without mechanical vibration (Te NWs/ACF without mechanical vibration) or comparative example 2 containing only activated carbon (ACF + mechanical vibration) had no killing effect on bacteria and fungi; the Te nanowire activated carbon fiber material insole (Te NWs/ACF + mechanical vibration) in the embodiment 1 can effectively kill bacteria and fungi on the insole under the condition of mechanical vibration when a person walks, and can kill 99.0 percent of the bacteria and fungi; comparative example 3 the insole (Te NWs + mechanical vibration) with only Te nanowires added had a certain bactericidal effect, but the effect was significantly reduced compared to example 1.
As can be seen from fig. 9, the cell membrane is continuously attacked by active oxygen species and finally ruptured during the mechanical vibration of the Te nanowire activated carbon fiber, which results in bacterial death, indicating that the Te nanowire piezoelectric catalyst can generate active oxygen species for killing bacteria and fungi under the mechanical vibration. The specific mechanism and process are shown in FIG. 10.
(2) Odor concentration determination
The insoles prepared in the embodiments 1 to 9 and the comparative examples 1 to 3 are normally worn and walked for 3 days, the number of steps counted when the insoles for each experiment are worn is controlled to be the same, the insoles are placed in a box with good air tightness of acrylic and both sides of which are communicated with polytetrafluoroethylene pipelines, the pipeline at one end blows off odor on the insoles by using high-purity nitrogen of 100mL/min, the pipeline at the other end is connected with an odor detector, and the odor value (OU value) of the odor emitted from the insoles after use is recorded. Blank controls were also set: example 1 the insole was worn normally but not walking, and the other measurements were the same. See table 1 for results.
TABLE 1 measurement results of sterilizing and deodorizing Properties
Figure BDA0002927842100000121
Figure BDA0002927842100000131
As can be seen from Table 1, the insoles prepared in the embodiments 1 to 9 of the invention have good sterilization effects along with Escherichia coli and black mold, wherein the Escherichia coli sterilization rate of the embodiment 1 is as high as 99.0%, and the Aspergillus niger sterilization rate is as high as 98.78%. Comparison of examples 1 to 7 demonstrates that different reagent dosages and hydrothermal conditions of the catalyst can be easily controlled and controlled, and that a good inactivation effect on bacteria and fungi can be maintained. The comparison of the examples 7 to 9 researches the influence of different usage amounts of the insole on the sterilization and deodorization performance, and the sterilization effect is not obviously improved when a certain concentration is reached. Comparative example shows that there is almost no sterilization effect under the conditions of using only the non-woven fabric (comparative example 1), using only the activated carbon fiber (comparative example 2), and not adding mechanical vibration (blank control); when only Te nanowires were used (comparative example 3), although some bactericidal deodorizing effect was exhibited, the effect was significantly reduced as compared with example 1.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (8)

1. A preparation method of a Te nanowire activated carbon fiber material with piezoelectricity is characterized by comprising the following steps:
s1, dissolving activated carbon fibers, sodium tellurite and a triblock copolymer of polyethylene oxide-polypropylene oxide-polyethylene oxide into water, gradually adding a reducing agent under the condition of stirring, adjusting the pH value, uniformly stirring, and carrying out hydrothermal synthesis reaction at the temperature of 140-180 ℃ to obtain a reaction solution;
s2, cooling the reaction liquid obtained in the step S1 to room temperature, centrifuging, cleaning the precipitate to be neutral, drying and grinding to obtain a Te nanowire activated carbon fiber material;
in the step S1, the mass ratio of the sodium tellurite to the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is 1 (1 to 3); the time of the hydrothermal synthesis reaction is 8 to 12 hours.
2. The preparation method of the Te nanowire/activated carbon fiber material according to claim 1, wherein in the step S2, the mass ratio of the Te nanowire to the activated carbon fiber in the obtained Te nanowire/activated carbon fiber material is 1 (0.5 to 2).
3. The preparation method according to claim 1, wherein in step S1, the mass ratio of the sodium tellurite to the reducing agent is 1 (0.005 to 0.05).
4. The method according to claim 1, wherein the pH is 12 to 13 in step S1.
5. A Te nanowire activated carbon fiber material with piezoelectricity, which is prepared by the preparation method of any one of claims 1 to 4.
6. The application of the Te nanowire active carbon fiber material with piezoelectricity claimed in claim 5 in the fields of sterilization and bacteriostasis.
7. A piezoelectric bacteriostatic insole, which is characterized by comprising the Te nanowire-containing activated carbon fiber material with piezoelectricity as claimed in claim 5.
8. A piezoelectric bacteriostatic insole according to claim 7, wherein the usage amount of the active carbon fiber material with the piezoelectric Te nanowires is 2 to 10mg/cm for each piezoelectric bacteriostatic insole 2 。
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