CN113996121A - Bio-based active carbon fiber filtering composite core material and preparation method and application thereof - Google Patents
Bio-based active carbon fiber filtering composite core material and preparation method and application thereof Download PDFInfo
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- CN113996121A CN113996121A CN202110104902.XA CN202110104902A CN113996121A CN 113996121 A CN113996121 A CN 113996121A CN 202110104902 A CN202110104902 A CN 202110104902A CN 113996121 A CN113996121 A CN 113996121A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2055—Carbonaceous material
- B01D39/2065—Carbonaceous material the material being fibrous
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
Abstract
The invention discloses a bio-based activated carbon fiber filtering composite core material and a preparation method and application thereof, wherein the preparation method comprises the following steps: activating the hybrid fiber to obtain hybrid activated carbon fiber, carrying out hybrid fabric combing treatment on the bio-based activated carbon fiber and the hybrid activated carbon fiber to prepare a bio-based activated carbon fiber filter layer precursor, heating and degassing the bio-based activated carbon fiber filter layer precursor under a vacuum condition, then soaking the degassed bio-based activated carbon fiber filter layer precursor in nano titanium dioxide aqueous solution or nano silver aqueous solution, drying after soaking to obtain a bio-based activated carbon fiber filter layer, and compounding the bio-based activated carbon fiber filter layer with a melt-blown non-woven fabric filter layer; the hybrid fiber is one or more of T300 carbon fiber, T700 carbon fiber, T800 carbon fiber, T1000 carbon fiber and viscose-based carbon fiber, and the mass ratio of the bio-based active carbon fiber to the hybrid active carbon fiber is 2-8: 1.
Description
Technical Field
The invention relates to a bio-based active carbon fiber filtering composite core material, a preparation method and application thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
With the continuous spread of pneumonia epidemic infected by novel coronavirus, the demand of protective equipment such as various filter materials and masks is increased. The conditional national profession and production of medical protection and filtration materials, particularly the typical personal protection filtration product such as a mask, has continuously increased demand in a short time, and has continuously raised very strict requirements for the quality stability and the functionalization level of the filtration material for the mask. The traditional disposable medical filter material is prepared by combining and laminating spun-bonded non-woven fabrics and melt-blown non-woven fabrics of polypropylene fibers, and the micro-pore structure formed by random overlapping of superfine fibers is utilized to filter and block dust, germs and particles of other harmful substances. However, the inventors have found that the conventional filter material of the laminated combination of ultrafine fibers has many problems of filtration efficiency and virus-blocking efficiency and functionality due to the bottleneck problems of flexibility and strength and adsorption property of the fibers themselves.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a bio-based activated carbon fiber filtering composite core material, a preparation method and application thereof, which can improve the service durability of a filtering fabric material and a product and enable the composite core material to have double functions of filtering and bacteriostasis.
In order to achieve the purpose, the technical scheme of the invention is as follows:
on one hand, the preparation method of the bio-based activated carbon fiber filtering composite core material comprises the following steps:
activating the hybrid fiber to obtain hybrid activated carbon fiber, carrying out hybrid fabric combing treatment on the bio-based activated carbon fiber and the hybrid activated carbon fiber to prepare a bio-based activated carbon fiber filter layer precursor, heating and degassing the bio-based activated carbon fiber filter layer precursor under a vacuum condition, then soaking the degassed bio-based activated carbon fiber filter layer precursor in nano titanium dioxide aqueous solution or nano silver aqueous solution, drying after soaking to obtain a bio-based activated carbon fiber filter layer, and compounding the bio-based activated carbon fiber filter layer with a melt-blown non-woven fabric filter layer;
the hybrid fiber is one or more of T300 carbon fiber, T700 carbon fiber, T800 carbon fiber, T1000 carbon fiber and viscose-based carbon fiber, and the mass ratio of the bio-based active carbon fiber to the hybrid active carbon fiber is 2-8: 1.
The active carbon fiber is a superfine fiber with a super-strong nanometer pore structure, has large specific surface area and strong adsorption selectivity and adsorption property, and in addition, because the active carbon fiber belongs to the category of inorganic fiber, the mechanical property of the carbon fiber for preparing the active carbon fiber is both the traditional polypropylene fiber and the traditional polyester fiber, so the active carbon fiber can be matched with the traditional filter fiber material for use, and the service durability of the filter fabric material and the product can be improved. However, the research shows that the fabric layer made of the activated carbon fiber has poor filtering performance and no bacteriostatic performance.
According to the invention, the bio-based activated carbon fiber and other activated carbon fibers are mixed in a specific proportion to prepare a fabric, then the fabric is impregnated with nano titanium dioxide aqueous solution or nano silver, so that the prepared bio-based activated carbon fiber filter layer has high adsorption performance, filtering performance and antibacterial performance, and the obtained filter composite core material has high strength, long durability, high adsorption performance, filtering performance and excellent antibacterial function by compounding with the melt-blown non-woven fabric filter layer.
On the other hand, the bio-based activated carbon fiber filtering composite core material is obtained by the preparation method.
In a third aspect, the bio-based activated carbon fiber filtering composite core material is applied to protective articles.
The invention has the beneficial effects that:
according to the invention, the active carbon fibers are selected, and the active carbon fiber filter layer is subjected to dipping treatment, so that the bio-based active carbon fiber filter layer has higher adsorption performance, filtering performance and excellent bacteriostatic function. And the bio-based activated carbon fiber filter layer and the melt-blown non-woven fabric filter layer are facilitated, so that the obtained filtering composite core material has a higher filtering effect, and the service durability of the filtering fabric material and the product can be improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a bio-based activated carbon fiber composite filter material prepared in example 1 of the present invention;
wherein, 1, the first spunbonded nonwoven layer, 2, the bio-based activated carbon fiber filter layer, 3, the melt-blown nonwoven filter layer, 4 and the second spunbonded nonwoven layer.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In view of the problems of low strength, poor adsorption performance, low filtration efficiency, poor antibacterial effect and the like of the conventional filter material, the invention provides a bio-based activated carbon fiber filter composite core material, and a preparation method and application thereof.
The invention provides a preparation method of a bio-based activated carbon fiber filtering composite core material, which comprises the following steps:
activating the hybrid fiber to obtain hybrid activated carbon fiber, carrying out hybrid fabric combing treatment on the bio-based activated carbon fiber and the hybrid activated carbon fiber to prepare a bio-based activated carbon fiber filter layer precursor, heating and degassing the bio-based activated carbon fiber filter layer precursor under a vacuum condition, then soaking the degassed bio-based activated carbon fiber filter layer precursor in nano titanium dioxide aqueous solution or nano silver aqueous solution, drying after soaking to obtain a bio-based activated carbon fiber filter layer, and compounding the bio-based activated carbon fiber filter layer with a melt-blown non-woven fabric filter layer;
the hybrid fiber is one or more of T300 carbon fiber, T700 carbon fiber, T800 carbon fiber, T1000 carbon fiber and viscose-based carbon fiber, and the mass ratio of the bio-based active carbon fiber to the hybrid active carbon fiber is 2-8: 1.
According to the invention, the bio-based activated carbon fiber and other activated carbon fibers are mixed in a specific proportion to prepare a fabric, then the fabric is impregnated with nano titanium dioxide aqueous solution or nano silver, so that the prepared bio-based activated carbon fiber filter layer has high adsorption performance, filtering performance and antibacterial performance, and the obtained filter composite core material has high strength, long durability, high adsorption performance, filtering performance and excellent antibacterial function by compounding with the melt-blown non-woven fabric filter layer.
In some examples of this embodiment, the bio-based activated carbon fiber has a filament surface average pore size of 1 to 2 nm.
In some examples of this embodiment, the hybrid activated carbon fiber has a filament surface average pore size of 1 to 4 nm.
In some examples of this embodiment, the degassing treatment is performed at a temperature of 120 to 140 ℃ for 1 to 3 hours.
In some examples of this embodiment, the concentration of the aqueous solution of nano titanium dioxide or nano silver is 1 to 2.5%. In the present invention, "%" is a mass percentage.
In some embodiments of this embodiment, the drying is performed at 60-80 ℃ for 2-6 hours.
The melt-blown non-woven fabric filter layer can be prepared by selecting any one or combination and mixing of various types of fibers of polyester fibers, polypropylene fibers, chinlon, spandex and acrylic fibers as raw materials, or by adopting the fibers as main fibers and using any one of fibers prepared from polyphenylene sulfide, polyether ether ketone, ethylene terephthalate, butylene terephthalate and other thermoplastic resins as mixed fibers, wherein the mixing type and the proportion of the fiber raw materials are flexibly adjusted according to the use requirements.
In some embodiments of this embodiment, the meltblown nonwoven filter layer is a web-like layered structure.
In one or more embodiments, the density of the reticular layered structure is 0.03-0.09 g/cm3The thickness of the single-layer net structure is 0.1-0.6 mm.
In some examples of the embodiment, the specific surface area of the monofilament fiber of the melt-blown non-woven fabric filter layer is 0.04-0.1 m2/g。
In some examples of this embodiment, the filter layer of the melt-blown nonwoven fabric has a grammage of 15 to 30g/m2. The weight of a single piece of a melt-blown non-woven fabric filter layer for preparing protective articles (such as a mask) is 0.2-0.6 g.
In some examples of this embodiment, the method of compounding is hot press lamination.
In one or more embodiments, heat press bondedThe conditions are as follows: the temperature is 130-160 ℃, and the pressure is 70-100 kg/cm2. By adopting the condition, the bio-based activated carbon fiber filter layer and the melt-blown non-woven fabric filter layer can be compounded into a whole, and the bio-based activated carbon fiber filter layer, the melt-blown non-woven fabric filter layer and the spun-bonded non-woven fabric layer can also be compounded into a whole.
In some examples of this embodiment, the first spunbond nonwoven fabric layer, the bio-based activated carbon fiber filter layer, and the meltblown nonwoven fabric filter layer are sequentially stacked and combined.
In some examples of this embodiment, a bio-based activated carbon fiber filter layer, a meltblown nonwoven filter layer, and a second spunbond nonwoven layer are sequentially stacked and combined.
In some examples of this embodiment, a first spunbond nonwoven fabric layer, a bio-based activated carbon fiber filter layer, a meltblown nonwoven fabric filter layer, and a second spunbond nonwoven fabric layer are sequentially stacked and combined.
The spun-bonded non-woven fabric layer can be made of one or more of terylene, polypropylene fiber, chinlon, spandex and acrylic fiber by combination and mixing, and the gram weight of the spun-bonded non-woven fabric protective layer is controlled to be 20-40g/m2The gram weight of the single sheet is controlled within the range of 0.2-0.8 g, wherein the mixing type and the proportion of the fiber raw materials are flexibly adjusted according to the use requirement.
In another embodiment of the invention, a bio-based activated carbon fiber filtering composite core material is provided, which is obtained by the preparation method.
In a third embodiment of the invention, the application of the bio-based activated carbon fiber filtering composite core material in a protective product is provided.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
A composite laminated material for filtering biobased activated carbon fiber is composed of a first spunbonded non-woven fabric layer 1, a biobased activated carbon fiber filtering layer 2, and a melt-blown non-woven fabric layerThe filter layer 3 and the second spun-bonded non-woven fabric layer 4. Wherein, the first spun-bonded non-woven fabric layer 1 and the second spun-bonded non-woven fabric layer 4 are made of the same material, the spun-bonded non-woven fabric layer is prepared from terylene, and the single-layer gram weight is 20g/m2The single sheet has the gram weight of 0.2 g, and the surface of the spun-bonded non-woven fabric layer is coated with a bio-based activated carbon fiber filter layer which is formed by mixing bio (lyocell) based activated carbon fibers and T300 according to the mixing ratio of 2:1, wherein the average pore diameter of each monofilament of the lyocell fibers and the hybrid fibers is 2.0nm, and the average pore diameter of each monofilament surface of the hybrid fibers is 1.0 nm. After a filter layer fabric of the bio-based activated carbon fiber filter layer is formed, firstly, activated carbon fibers are subjected to vacuum degassing treatment for 1 hour at 130 ℃, then, a 1.0% aqueous solution of nano titanium dioxide is adopted for impregnation, and the impregnation is carried out after drying for 2 hours at 65 ℃ to complete bacteriostasis treatment. The surface of the bio-based activated carbon fiber filter layer is coated with a fabric filter layer made of acrylic fiber raw material mixed with thermoplastic resin such as polyphenylene sulfide and the like, the mixing ratio of the two fibers is 2:1, and the bulk density of the melt-blown non-woven fabric layer is 0.03g/cm3The thickness of the single-layer net-shaped filter layer is 0.1mm, and the specific surface area of the monofilament fiber of the melt-blown non-woven fabric layer is 0.04m2(ii) in terms of/g. The gram weight of the melt-blown non-woven fabric filter layer is 15g/m2The single-piece gram weight is 0.2 gram. The four-layer structure of the laminated fabric filter material adopts the hot pressing temperature of 130 ℃ and the hot pressing temperature of 70kg/cm2The pressure of (2) is hot-pressed and attached in a hot metal roller. The specific surface area of the prepared adsorption material is 1500m2More than g, 99 percent of filtering efficiency, 99 percent of bacteriostasis efficiency, not less than PM2.5 technical requirement of filtering grade and 17.5N of peeling strength.
Example 2
A bio-based activated carbon fiber filtering composite laminated material comprises a first spun-bonded non-woven fabric layer, a bio-based activated carbon fiber filtering layer, a melt-blown non-woven fabric filtering layer and a second spun-bonded non-woven fabric layer. Wherein the spun-bonded non-woven fabric layer is prepared from polypropylene fibers and has a single-layer gram weight of 40g/m2The single sheet has a gram weight of 0.8 g, a bio-based activated carbon fiber filter layer is attached to the surface of the spunbonded non-woven fabric layer, and the bio-based activated carbon fiber filter layer is formed by mixing bio (lyocell) based activated carbon fibers and T700 in a mixing ratio of 8:1, wherein lyocell is mixed with T700The average pore size of the monofilament of the fiber and the hybrid fiber is 2.0nm, and the average pore size of the monofilament surface of the hybrid fiber is 4.0 nm. After a filter layer fabric of the bio-based activated carbon fiber filter layer is formed, firstly, activated carbon fibers are degassed at 130 ℃ for 3 hours in vacuum, then, the activated carbon fibers are soaked in a nano-silver aqueous solution with the concentration of 2.5%, and then, the activated carbon fibers are dried at 80 ℃ for 6 hours to complete the sterilization treatment. The surface of the bio-based activated carbon fiber filter layer is coated with a fabric filter layer made of polyamide fiber raw material mixed with thermoplastic resin such as butanediol terephthalate, the mixing ratio of the two fibers is 3:1, and the bulk density of the melt-blown non-woven fabric layer is 0.09g/cm3The thickness of the single-layer net-shaped filter layer is 0.6mm, and the specific surface area of the monofilament fiber of the melt-blown non-woven fabric layer is 0.1m2(ii) in terms of/g. The gram weight of the melt-blown non-woven fabric filter layer is 30g/m2The single-piece gram weight is 0.6 gram. The four-layer structure of the laminated fabric filter material adopts the hot pressing temperature of 160 ℃ and the hot pressing temperature of 100kg/cm2The pressure of (2) is hot-pressed and attached in a hot metal roller. The specific surface area of the prepared adsorption material is 1500m2More than g, 99 percent of filtering efficiency, 99 percent of bacteriostasis efficiency, not less than PM2.5 technical requirement of filtering grade and 17.5N of average peeling strength.
Example 3
A bio-based activated carbon fiber filtering composite laminated material comprises a first spun-bonded non-woven fabric layer, a bio-based activated carbon fiber filtering layer, a melt-blown non-woven fabric filtering layer and a second spun-bonded non-woven fabric layer. Wherein the spun-bonded non-woven fabric layer is prepared from acrylic fibers and has a single-layer gram weight of 35g/m2The single sheet has the gram weight of 0.7 g, and the surface of the spun-bonded non-woven fabric layer is coated with a bio-based activated carbon fiber filter layer which is formed by mixing bio (lyocell) based activated carbon fibers and T800 according to the mixing ratio of 6:1, wherein the average pore diameter of each monofilament of the lyocell fibers and the hybrid fibers is 1.5nm, and the average pore diameter of each monofilament surface of the hybrid fibers is 2.6 nm. After a filter layer fabric of the bio-based activated carbon fiber filter layer is formed, firstly, activated carbon fibers are subjected to vacuum degassing treatment for 1.5 hours at 130 ℃, then, a 1.8% aqueous solution of nano titanium dioxide is adopted for impregnation, and drying is carried out for 3.6 hours at 65 ℃ to complete the sterilization treatment. In the active carbon fiber filter layer of biobasedThe surface of the fabric filter layer is coated with fibers prepared by mixing polyurethane fiber raw material with polyether-ether-ketone thermoplastic resin, the mixing ratio of the two fibers is 2:1, and the bulk density of the melt-blown non-woven fabric layer is 0.035g/cm3The thickness of the single-layer mesh filter layer is 0.25mm, and the specific surface area of the monofilament fiber of the melt-blown non-woven fabric layer is 0.09m2(ii) in terms of/g. The gram weight of the melt-blown non-woven fabric filter layer is 22g/m2The single-piece gram weight is 0.25 g. The above four-layer structure of laminated fabric filter material adopts hot pressing temperature of 150 deg.C and 90kg/cm2The pressure of (2) is hot-pressed and attached in a hot metal roller. The specific surface area of the prepared adsorption material is 1500m2More than g, 99 percent of filtering efficiency, 99 percent of bacteriostasis efficiency, not less than PM2.5 technical requirement of filtering grade and 19.5N of peeling strength.
Example 4
A bio-based activated carbon fiber filtering composite laminated material comprises a first spun-bonded non-woven fabric layer, a bio-based activated carbon fiber filtering layer, a melt-blown non-woven fabric filtering layer and a second spun-bonded non-woven fabric layer. Wherein the spun-bonded non-woven fabric layer is prepared from chinlon, and the single-layer gram weight is 30g/m2The single sheet has the gram weight of 0.6g, and the surface of the spun-bonded non-woven fabric layer is coated with a bio-based activated carbon fiber filter layer which is formed by mixing bio (lyocell) based activated carbon fibers and T1000 in a mixing ratio of 6:1, wherein the average pore diameter of monofilaments of the lyocell fibers and the mixed fibers is 1.8nm, and the average pore diameter of the surface of the monofilaments of the mixed fibers is 3.5 nm. After a filter layer fabric of the bio-based activated carbon fiber filter layer is formed, firstly, activated carbon fibers are subjected to vacuum degassing treatment at 130 ℃ for 2.5 hours, then, a nano-silver aqueous solution with the concentration of 2% is adopted for impregnation, and the impregnation is carried out after drying at 80 ℃ for 5 hours to complete the sterilization treatment. The surface of the bio-based activated carbon fiber filter layer is coated with a fabric filter layer made of fibers prepared by mixing thermoplastic resins such as polyester raw material and ethylene glycol terephthalate, the mixing ratio of the two fibers is 6:1, and the bulk density of the melt-blown non-woven fabric layer is 0.07g/cm3The thickness of the single-layer mesh filter layer is 0.5mm, and the specific surface area of the monofilament fiber of the melt-blown non-woven fabric layer is 0.09m2(ii) in terms of/g. The gram weight of the melt-blown non-woven fabric filter layer is 26g/m2The single-piece gram weight is 0.5 gram. Filtration of the above laminated fabricsThe hot pressing temperature of 150 ℃ and the hot pressing temperature of 90kg/cm are adopted among four-layer structures of the material2The pressure of (2) is hot-pressed and attached in a hot metal roller. The specific surface area of the prepared adsorption material is 1500m2More than g, 99 percent of filtering efficiency, 99 percent of bacteriostasis efficiency, not less than PM2.5 technical requirement of filtering grade and 20.1N of peeling strength.
Comparative example 1
This comparative example is the same as example 1, except that: the vacuum degassing treatment and the bacteriostasis treatment are omitted, and the specific surface area of the prepared adsorption material is less than 1000m2The filtration efficiency is 85 percent below the g, the bacteriostatic efficiency is 0 percent, the filtration grade can not meet the technical requirement of PM2.5, and the peel strength is 17.5N.
Comparative example 2
This comparative example is the same as example 1, except that: the temperature of hot pressing and attaching is 120 ℃. The specific surface area of the prepared adsorption material is 1500m2The filtration efficiency is 99 percent and the bacteriostasis efficiency is 99 percent below the/g, the filtration grade reaches the technical requirement of PM2.5, and the peel strength is 10.1N.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation method of a bio-based active carbon fiber filtering composite core material is characterized by comprising the following steps:
activating the hybrid fiber to obtain hybrid activated carbon fiber, carrying out hybrid fabric combing treatment on the bio-based activated carbon fiber and the hybrid activated carbon fiber to prepare a bio-based activated carbon fiber filter layer precursor, heating and degassing the bio-based activated carbon fiber filter layer precursor under a vacuum condition, then soaking the degassed bio-based activated carbon fiber filter layer precursor in nano titanium dioxide aqueous solution or nano silver aqueous solution, drying after soaking to obtain a bio-based activated carbon fiber filter layer, and compounding the bio-based activated carbon fiber filter layer with a melt-blown non-woven fabric filter layer;
the hybrid fiber is one or more of T300 carbon fiber, T700 carbon fiber, T800 carbon fiber, T1000 carbon fiber and viscose-based carbon fiber, and the mass ratio of the bio-based active carbon fiber to the hybrid active carbon fiber is 2-8: 1.
2. The method for preparing the bio-based activated carbon fiber filtration composite core material as claimed in claim 1, wherein the average pore diameter of the monofilament surface of the bio-based activated carbon fiber is 1 to 2 nm;
or the average pore diameter of the monofilament surface of the hybrid activated carbon fiber is 1-4 nm.
3. The method for preparing the bio-based activated carbon fiber filtration composite core material as claimed in claim 1, wherein the degassing treatment temperature is 120 to 140 ℃ and the degassing treatment time is 1 to 3 hours.
4. The method for preparing the bio-based activated carbon fiber filtration composite core material as claimed in claim 1, wherein the concentration of the nano titanium dioxide aqueous solution or the nano silver aqueous solution is 1 to 2.5%.
5. The method for preparing the bio-based activated carbon fiber filtration composite core material as claimed in claim 1, wherein the drying condition is 60-80 ℃ for 2-6 hours.
6. The method for preparing the bio-based activated carbon fiber filtering composite core material as claimed in claim 1, wherein the melt-blown non-woven fabric filtering layer has a net-shaped laminated structure; preferably, the density of the reticular laminated structure is 0.03-0.09 g/cm3The thickness of the single-layer net structure is 0.1-0.6 mm;
or the specific surface area of the monofilament fiber of the melt-blown non-woven fabric filter layer is 0.04-0.1 m2/g；
Or the gram weight of the melt-blown non-woven fabric filter layer is 15-30 g/m2。
7. The method for preparing the bio-based activated carbon fiber filtration composite core material according to claim 1, wherein the compounding method is hot press bonding;
preferably, the hot press bonding conditions are as follows: the temperature is 130-160 ℃, and the pressure is 70-100 kg/cm2。
8. The method of claim 1, wherein the first spunbonded nonwoven fabric layer, the bio-based activated carbon fiber filter layer and the meltblown nonwoven fabric filter layer are sequentially stacked and combined;
or the bio-based activated carbon fiber filter layer, the melt-blown non-woven fabric filter layer and the second spun-bonded non-woven fabric layer are stacked in sequence and compounded;
or the first spun-bonded non-woven fabric layer, the bio-based activated carbon fiber filter layer, the melt-blown non-woven fabric filter layer and the second spun-bonded non-woven fabric layer are stacked in sequence and compounded.
9. A bio-based activated carbon fiber filtration composite core material, which is obtained by the preparation method according to any one of claims 1 to 8.
10. Use of the bio-based activated carbon fiber filtration composite core of claim 9 in protective applications.
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| CN115646064A (en) * | 2022-09-27 | 2023-01-31 | 武汉纺织大学 | Polyether-ether-ketone non-woven fabric filter material and preparation method and application thereof |
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