CN113975894A - Composite filter material with adsorption function and preparation method thereof - Google Patents
Composite filter material with adsorption function and preparation method thereof Download PDFInfo
- Publication number
- CN113975894A CN113975894A CN202111376310.XA CN202111376310A CN113975894A CN 113975894 A CN113975894 A CN 113975894A CN 202111376310 A CN202111376310 A CN 202111376310A CN 113975894 A CN113975894 A CN 113975894A
- Authority
- CN
- China
- Prior art keywords
- layer
- fiber
- filter material
- central
- composite filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a composite filter material with an adsorption function, and belongs to the field of filter materials. The composite filter material sequentially comprises a diversion supporting layer, a central filtering layer and a hydrophobic supporting layer from water inlet to water outlet; the diversion supporting layer is used for shunting liquid and supporting the central filtering layer; the central filter layer is used for aperture interception and charge adsorption filtration; and the hydrophobic support layer is used for supporting and maintaining the structure of the composite filter material. The filter material can be widely used for water filtration treatment, can intercept silt, rust, algae, suspended matters, microfiber and other particulate impurities in water, and can adsorb bacteria, viruses and with the diameter of 10%‑4～10‑6The colloid between mm has excellent performance, and can be applied to drinking water treatment, process water purification, sewage treatment, printing and dyeing wastewater treatment, water filtration treatment containing radioactive substances and the like. Book (I)The invention also discloses a preparation method of the composite filter material with the adsorption function.
Description
Technical Field
The invention relates to a composite filter material, in particular to a composite filter material with an adsorption function and a preparation method thereof, and belongs to the technical field of filter materials.
Background
With continuous pursuit of people on living quality and higher requirements on fluid cleanliness in industry, a filter material is needed, and the filter material can filter solid impurities and can effectively intercept colloidal substances in water. In the field of liquid filtration, the most common way is to use pore size to intercept suspended solid in liquid, and the filter material usually adopts a single-layer or loose multi-layer filter material structure, such as a microfiltration membrane, an ultrafiltration membrane, a reverse osmosis membrane, etc., because of technical limitation, if the pore size of the filter material is very dense, the initial pressure difference will be very high, resulting in short service life. At the same time, the diameter is 10 for bacteria, viruses and-4～10-6the colloid interception effect between mm is general.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defect that the filter material is only mechanically intercepted and filtered by the aperture size in the prior art, and provides the composite filter material with the adsorption function and the preparation method thereof, wherein the composite filter material can filter most of solid impurities in fluid, can adsorb and filter colloid substances in water, and reduces the additional equipment cost for specially removing colloid.
In order to solve the technical problems, the composite filter material with the adsorption function provided by the invention sequentially comprises a diversion supporting layer, a central filtering layer and a hydrophobic supporting layer from water inlet to water outlet;
the diversion supporting layer is used for shunting liquid and supporting the central filtering layer;
the central filter layer is used for aperture interception and charge adsorption filtration;
and the hydrophobic support layer is used for supporting and maintaining the structure of the composite filter material.
In the invention, the central filter layer is compounded by a plurality of materials, at least any two of wood cellulose, glass fiber and high polymer fiber and nano materials which can generate high Zeta potential in water.
In the invention, when the central filter layer is made of wood cellulose, glass fiber, high molecular polymer fiber and nano material, the mass percentage of the wood cellulose in the central filter layer is 30-50%, the mass percentage of the glass fiber in the central filter layer is 30-39.9%, the mass percentage of the high molecular polymer fiber in the central filter layer is 15-30%, and the mass percentage of the nano material in the central filter layer is 0.1-5%;
when the central filter layer is made of wood cellulose, high polymer fibers and nano materials, the mass ratio of the wood cellulose to the high polymer fibers in the central filter layer is 55-85%, the mass ratio of the high polymer fibers in the central filter layer is 13-40%, and the mass ratio of the nano materials in the central filter layer is 2-5%;
when the central filter layer is made of glass fibers, high polymer fibers and nano materials, the mass percentage of the glass fibers in the central filter layer is 75%, the mass percentage of the high polymer fibers in the central filter layer is 16.5%, and the mass percentage of the nano materials in the central filter layer is 8.5%.
In the invention, the average size of the nano material is 100-300 nanometers, and the nano material is in the shape of fiber, porous sphere, powder or sheet.
In the invention, the nanometer material can generate Zeta potential of not less than 30mV in water with pH of 4-10.5.
In the invention, the flow guide supporting layer and the hydrophobic supporting layer are both polyester fiber non-woven fabric or polypropylene non-woven fabric.
In the invention, the high molecular polymer fiber is any one or combination of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyacrylonitrile, polyether sulfone, polystyrene or polypropylene; the nano material is hydrated alumina, yttrium oxide, silicon oxide or epoxy resin.
In the invention, the average pore diameter range of the central filter layer is 1-8 μm.
The invention also provides a preparation method of the composite filter material with the adsorption function, which comprises the following steps:
s1, mixing three or two of lignin fiber, high polymer fiber and glass fiber according to a proportion to obtain mixed fiber;
s2, dissolving the nano material in pure water, then adding the mixed fiber obtained in the step S1 in proportion, stirring and mixing, standing for not less than 24 hours in a constant temperature and humidity environment, and growing to form fiber wadding;
s3, uniformly spreading the fiber wadding obtained in the step S2 through continuous water flow, and performing cold rolling to improve the strength;
s4, drying and compacting the fiber wadding subjected to cold rolling into a net, and performing hot-pressing compounding on the non-woven fabric serving as the flow guide supporting layer and the hydrophobic supporting layer to form a film through hot-melt double-sided adhesive;
and S5, soaking or washing the filter material obtained in the step S4 by using ultrapure water, washing away residual chemical substances and fiber fragments, and drying and cleaning to obtain the composite filter material with the adsorption function.
In the present invention, the step S2 further includes a step of promoting normal attachment and growth of the nano-material on the hybrid fiber.
The invention has the beneficial effects that: (1) the composite filter material can not only intercept suspended substances in water through the pore diameter, but also absorb colloidal substances in water through positive charges generated by the nano material and the superfine fiber, and can not only filter silt, rust, algae, suspended substances, microfibers and other particulate impurities in water, but also absorb bacteria and viruses and have a diameter of 10%-4～10-6And (5) colloid between mm. (2) The composite filter material can be used for manufacturing various filter products, and is suitable for the field of drinking water, and is used for filtering industrial production water, including power plant production water, nuclear power plant process water, electronic plant production water, pharmaceutical plant production water, industrial domestic wastewater and water containing radioactive substances. For solid particle impurities larger than 1 micron, mechanical interception can be realized by the aperture size of the filter material; for submicron and even nanometer bacteria, viruses and colloidal substances which are in a negatively charged state in water, the central filter layer of the composite filter material contains nano fibers and can produce in water>The above-mentioned submicron-sized impurities can be effectively adsorbed by a Zeta potential of 30 mV. Thereby realizing high-precision filtration, high flux and low pressure loss, andand the service life longer than that of high-precision mechanical filtration can be provided, and the long-term operation cost is saved for users.
Drawings
FIG. 1 is a schematic view of a composite filter material with an adsorption function;
FIG. 2 is a flow chart of the preparation process of example 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, the composite filter material in this embodiment includes 3 layers from the water inlet to the water outlet, and the first layer is a flow guide support layer 1, the second layer is a central filter layer 2, and the third hydrophobic support layer 3 in sequence. The three-layer structure forms an integral structure and then is tightly combined, so that the filter material is prevented from being loose after being folded, the influence on strength and filtering effect is avoided, the thickness of the filter material is reduced after the integral structure is formed, and more effective filtering areas can be provided in the same space. The main functions of the flow guiding support layer 1 are to divide the flow through the flow guiding support layer into a filter layer and a liquid layer and to support a central filter layer. The central filter layer 2 is mainly used for intercepting and filtering silt, rust, algae, suspended matters, micro-fiber and other particle impurities in water and adsorbing bacteria, viruses and the like with electric charges by using pore diameters of 10-4～10-6And (5) colloid between mm. The hydrophobic support layer 3 is mainly used for supporting and protecting the filter material structure from deformation. In this example, a polyester fiber nonwoven fabric having an average pore size of 40 μm was used as the flow-guiding support layer 1 and the hydrophobic support layer 3; the central filter layer 2 is made of a mixture of wood cellulose, glass fiber, polyethylene terephthalate (PET) fiber and hydrated alumina nano-materials. The hydroxyl of the lignocellulose can be grafted with the hydrated alumina nano material; the addition of the glass fiber material is beneficial to enhancing the strength of the filter material, reducing the average pore diameter and increasing the dirt holding capacity; polyethylene terephthalate (PET) fiber introduction facilitates graft growth of nanomaterials on lignocellulose and provides higher strength support. The mass ratio of the wood cellulose in various materials of the central filter layer is 50%, and the length-diameter ratio of the wood cellulose is 3-5 mm: 0.2 mm; the glass fiber is made of medium-alkali glass, the diameter of the fiber is about 0.65mm, the length of the fiber is 3-5 mm, and the mass percentage of the glass fiber in various materials is 30%; the mass percentage of polyethylene terephthalate (PET) in various materials is 15 percent; the molecular formula of the hydrated alumina nano material is gamma-AlOOH, the hydrated alumina nano material accounts for 5% of the mass of various materials, has an average size of 200 nanometers, is sheet-shaped, and can generate Zeta potential of not less than 50mV in water with a pH range of 7.
Example 1 a composite material was prepared as follows, as shown in figure 2:
s1, pre-drying the lignocellulose according to the properties, and then crushing the lignocellulose by a high-speed crusher; according to the characters, repeatedly beating polyethylene terephthalate (PET) into bulk fibers by using a high-speed beating rod in a pipeline to make the bundle fibers into single fibers;
s2, mixing the lignin fiber, polyethylene terephthalate (PET) and glass fiber to obtain a three-in-one mixed fiber sample;
s3, mixing the hydrated alumina nano material according to the weight ratio of 1: 10, adding pure water, placing the three-in-one mixed fiber obtained in the step S2 into a vessel, stirring and mixing, standing for 28 hours in a constant temperature and humidity environment, and promoting normal attachment and growth of the hydrated alumina nano material on the mixed fiber by ultrasonic treatment to form fiber wadding;
and S4, preparing a stainless steel water tank, wherein one end of the stainless steel water tank is provided with a flow inlet, and the other end of the stainless steel water tank is provided with an overflow port. And transferring the fiber flocs which are grown in the growth vessel into a stainless steel water tank, supplying water to the stainless steel water tank, simultaneously stirring and dispersing the fiber flocs, overflowing water with the fiber flocs by using the stainless steel water tank, and recycling the overflowed water to the inflow port of the stainless steel water tank by using a water pump, so that the fiber flocs are continuously supplied to the stainless steel water tank. Placing a slope netting machine in front of an overflow port of the stainless steel water tank or at the overflow port of the stainless steel water tank, wherein the slope netting machine is a conveying belt composed of 40-mesh stainless steel nets, uniformly paving fiber batting in the stainless steel water tank on the stainless steel nets, and conveying the fiber batting to a rolling dryer for cold rolling to improve the strength;
s5, drying and compacting the cold-rolled web-formed fiber wadding, and performing hot-pressing compounding on two surfaces of the fiber wadding to form a film by using polyester fiber non-woven fabrics and epoxy glue respectively to form a composite filter material;
s6, soaking the composite filter material obtained in the step S5 for 3 days by using ultrapure water, and removing residual chemical substances and fiber fragments;
and S7, drying the composite filter material processed in the S6, finishing the composite filter material after drying, obtaining coiled filter cloth through a hot roller according to the set width, and finally sealing and packaging for later use.
The average pore size of the central filter layer of the composite filter material prepared by the embodiment is 1.5-5 μm.
Example 2
In this example, a polypropylene nonwoven fabric having an average pore size of 45 μm was used as the flow guide support layer and the hydrophobic support layer; the central filter layer is made of a mixture of wood cellulose, polybutylene terephthalate (PBT) fibers and silicon oxide nano materials. The hydroxyl of the lignocellulose can be grafted with the nano material; the addition of polybutylene terephthalate (PBT) fibers is beneficial to enhancing the strength of the filter material and improving the dirt-holding capacity. Wherein the mass percentage of the lignocellulose in various materials of the central filter layer is 55%, and the length-diameter ratio of the lignocellulose is 3-5 mm: 0.2 mm; the mass percentage of polybutylene terephthalate (PBT) in various materials is 40%; the silicon oxide nano material accounts for 5 percent of the mass of each material, has the average size of 200 nanometers, is in a porous spherical shape, and can generate Zeta potential of not less than 38mV in water with the pH range of 6.
Example 2 the composite material was prepared as follows:
s1, pre-drying the lignocellulose according to the properties, and then crushing the lignocellulose by a high-speed crusher; according to the properties, repeatedly beating polybutylene terephthalate (PBT) into bulk fibers by using a high-speed beating rod in a pipeline to make the bundle fibers into single fibers;
s2, mixing the lignin fiber and polybutylene terephthalate (PBT) glass fiber to obtain a two-in-one mixed fiber sample;
s3, mixing the silicon oxide nano material according to the weight ratio of 1: 10, adding pure water, placing the two-in-one mixed fiber obtained in the step S2 into a vessel, stirring and mixing, standing for 28 hours in a constant temperature and humidity environment, and adding 1 g of NaHCO3(sodium bicarbonate) promotes the normal attachment and growth of the silicon oxide nano material on the mixed fiber to form fiber wadding;
s4 is the same as in example 1;
s5, drying and compacting the fiber wadding subjected to cold rolling to form a net, and performing hot-pressing compounding on two surfaces of the fiber wadding to form a film by using a polypropylene non-woven fabric and acrylic acid glue respectively to form a composite filter material;
s6 and S7 are the same as in example 1.
The average pore size of the center filtration layer of the composite filter prepared in this example was 7 μm.
Example 3
In this example, a polyester fiber nonwoven fabric having an average pore size of 40 μm was used as the flow guide support layer and the hydrophobic support layer; the central filter layer is made of a mixture of wood cellulose, glass fiber, polyacrylonitrile and polystyrene mixture and yttrium oxide nano-material. The hydroxyl of the lignocellulose can be grafted with the nano material; the addition of the glass fiber material is beneficial to enhancing the strength of the filter material, reducing the average pore diameter and increasing the dirt holding capacity; the introduction of the polyacrylonitrile and polystyrene mixed fiber helps the nano material to be stably grafted on the lignocellulose for growing and provides higher-strength support. Wherein the mass ratio of the wood cellulose in various materials of the central filter layer is 30%, the length-diameter ratio of the wood cellulose is 3-5 mm: 0.2 mm; the glass fiber is made of medium-alkali glass, the diameter of the fiber is about 0.65mm, the length of the fiber is 3-5 mm, and the mass percentage of the glass fiber in various materials is 39.9%; the mass percentage of the polyacrylonitrile and polystyrene mixture in various materials is 30%, and the mass percentage of the polyacrylonitrile and polystyrene is 3: 1; the yttrium oxide nano material accounts for 0.1 percent of the mass of each material, has an average size of 280 nanometers, is fibrous in shape, and can generate Zeta potential of not less than 30mV in water with a pH range of 10.5.
Example 3 a composite material was prepared as follows:
s1, pre-drying the lignocellulose according to the properties, and then crushing the lignocellulose by a high-speed crusher; according to characters, repeatedly beating the polyacrylonitrile and polystyrene mixture into bulk fibers by adopting a high-speed beating rod in the pipeline, and enabling the bundle fibers to be in a single fiber shape;
s2, mixing the lignin fiber, the glass fiber and the polyacrylonitrile and polystyrene mixture to obtain a three-in-one mixed fiber sample;
s3, mixing the yttrium oxide nano material according to the weight ratio of 1: 10, adding pure water into a vessel, then placing the three-in-one mixed fiber obtained in the step S2 into the vessel, stirring and mixing, standing for 24 hours in a constant temperature and humidity environment, and promoting normal attachment and growth of the yttrium oxide nano material on the mixed fiber by ultrasonic treatment to form a fiber wadding;
s4 to S7 are the same as in example 1.
The average pore size of the central filtration layer of the composite filter prepared in this example was 2 μm.
Example 4
In this example, a polyester fiber nonwoven fabric having an average pore size of 40 μm was used as the flow guide support layer and the hydrophobic support layer; the central filter layer is made of a mixture of wood cellulose, polyether sulfone and epoxy resin nano materials. Wherein the mass ratio of the wood cellulose in various materials of the central filter layer is 85%, the length-diameter ratio of the wood cellulose is 3-5 mm: 0.2 mm; the mass percentage of the polyether sulfone in various materials is 13 percent; the epoxy resin nano material accounts for 2 percent of the mass of various materials, has the average size of 300 nanometers, is powdery, and can generate Zeta potential of not less than 55mV in water with the pH range of 4.
Example 4 a composite material was prepared as follows:
s1, pre-drying the lignocellulose according to the properties, and then crushing the lignocellulose by a high-speed crusher; according to the characters, repeatedly beating the polyether sulfone fibers into bulk fibers by adopting a high-speed beating rod in the pipeline, and then making the fascicular fibers into single fibrous fibers;
s2, mixing the lignin fiber and the polyether sulfone fiber to obtain a two-in-one mixed fiber sample;
s3, mixing the epoxy resin nano material according to the weight ratio of 1: 10, adding pure water into the vessel, then placing the two-in-one mixed fiber obtained in the step S2 into the vessel, stirring and mixing, standing for 28 hours in a constant temperature and humidity environment, and promoting the normal adhesion and growth of the epoxy resin nano material on the mixed fiber through ultrasonic treatment to form fiber wadding;
s4 to S7 are the same as in example 1.
The average pore size of the central filtration layer of the composite filter prepared in this example was 8 μm.
Example 5
In this example, a polyester fiber nonwoven fabric having an average pore size of 40 μm was used as the flow guide support layer and the hydrophobic support layer; the central filtering layer is made of the mixture of glass fiber, polypropylene and hydrated alumina nano material. The addition of the glass fiber material is beneficial to enhancing the strength of the filter material, reducing the average pore diameter and increasing the dirt holding capacity; the polypropylene can realize the grafting of the alumina nano material on the cellulose of the alumina nano material and provide support. Wherein the glass fiber is made of medium-alkali glass, the diameter of the fiber is about 0.65mm, the length of the fiber is 3-5 mm, and the mass percentage of the glass fiber in various materials is 75%; the mass percentage of the polypropylene in various materials is 16.5 percent; the molecular formula of the hydrated alumina nano material is gamma-AlOOH, the mass percentage of the hydrated alumina nano material in various materials is 8.5%, the average size is 160 nanometers, the hydrated alumina nano material is in a sheet shape, and the hydrated alumina nano material can generate Zeta potential of not less than 50mV in water with the pH range of 7.
Example 1 a composite material was prepared as follows:
s1, beating the polypropylene into bulk fibers by adopting a high-speed beating rod in the pipeline according to the properties, and making the bundle fibers into single fibers;
s2, mixing the polypropylene fiber and the glass fiber to obtain a two-in-one mixed fiber sample;
s3, mixing the hydrated alumina nano material according to the weight ratio of 1: 10, adding pure water, placing the two-in-one mixed fiber obtained in the step S2 into a vessel, stirring and mixing, standing for 26 hours in a constant temperature and humidity environment, and promoting normal attachment and growth of the hydrated alumina nano material on the mixed fiber through ultrasonic treatment to form fiber wadding;
s4 to S7 are the same as in example 1.
The average pore size of the center filtration layer of the composite filter prepared in this example was 1 μm.
The composite filter material prepared by the embodiment can be suitable for liquid with pH from 4 to 11, has good acid and alkali resistance, and can meet the pH value ranges of water and discharge water of production process systems of most chemical plants and power plants including nuclear power plants, sewage treatment plants and the like; the tested filtering precision range of 0.1-25 microns shows that the filtering efficiency is more than 98 percent. The main practical test results show that the single-pass method tests that the filtration efficiency of 0.1 micron is more than 98%, the filtration efficiency of 0.45 micron is more than 99%, the filtration efficiency of 1 micron is more than 99.5%, the filtration efficiency of 5 micron is more than 99.8%, the filtration efficiency of 10 micron is more than 99.9%, and the filtration efficiency of 25 micron is more than 99.99%. The composite filter material is easy to fold, has good performance, easy shaping, high fluidity and low pressure drop, and can be used for most of high-precision water filtration.
The test results of the submicron-sized test dust used for the composite filter material obtained in each example are as follows:
while the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (10)
1. The composite filter material with the adsorption function is characterized in that the composite filter material sequentially comprises a diversion supporting layer, a central filtering layer and a hydrophobic supporting layer from water inlet to water outlet;
the diversion supporting layer is used for shunting liquid and supporting the central filtering layer;
the central filter layer is used for aperture interception and charge adsorption filtration;
and the hydrophobic support layer is used for supporting and maintaining the structure of the composite filter material.
2. The composite filter material with adsorption function of claim 1, wherein the central filter layer is made of a composite of multiple materials, at least any two of wood cellulose, glass fiber and polymer fiber, and a nano material capable of generating high Zeta potential in water.
3. The composite filter material with adsorption function according to claim 2,
when the central filter layer is made of wood cellulose, glass fiber, high polymer fiber and nano materials, the mass percentage of the wood cellulose in the central filter layer is 30-50%, the mass percentage of the glass fiber in the central filter layer is 30-39.9%, the mass percentage of the high polymer fiber in the central filter layer is 15-30%, and the mass percentage of the nano materials in the central filter layer is 0.1-5%;
when the central filter layer is made of wood cellulose, high polymer fibers and nano materials, the mass ratio of the wood cellulose to the high polymer fibers in the central filter layer is 55-85%, the mass ratio of the high polymer fibers in the central filter layer is 13-40%, and the mass ratio of the nano materials in the central filter layer is 2-5%;
when the central filter layer is made of glass fibers, high polymer fibers and nano materials, the mass percentage of the glass fibers in the central filter layer is 75%, the mass percentage of the high polymer fibers in the central filter layer is 16.5%, and the mass percentage of the nano materials in the central filter layer is 8.5%.
4. The composite filter material with an adsorption function according to claim 2 or 3, wherein the nanomaterial has an average size of 100 to 300 nm and is in the form of fibers, porous spheres, powder or sheets.
5. The composite filter material with the adsorption function according to any one of claim 4, wherein the nanomaterial can generate a Zeta potential of not less than 30mV in water with a pH of 4-10.5.
6. The composite filter material with adsorption function of claim 1, wherein the flow guide support layer and the hydrophobic support layer are both polyester fiber non-woven fabric or polypropylene non-woven fabric.
7. The composite filter material with the adsorption function according to claim 1, wherein the high polymer fiber is any one or a combination of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyacrylonitrile, polyethersulfone, polystyrene or polypropylene; the nano material is hydrated alumina, yttrium oxide, silicon oxide or epoxy resin.
8. The composite filter material with adsorption function according to claim 1, wherein the average pore size of the central filter layer is 1 to 8 μm.
9. A preparation method of a composite filter material with an adsorption function is characterized by comprising the following steps:
s1, mixing three or two of lignin fiber, high polymer fiber and glass fiber according to a proportion to obtain mixed fiber;
s2, dissolving the nano material in pure water, then adding the mixed fiber obtained in the step S1 in proportion, stirring and mixing, standing for not less than 24 hours in a constant temperature and humidity environment, and growing to form fiber wadding;
s3, uniformly spreading the fiber wadding obtained in the step S2 through continuous water flow, and performing cold rolling to improve the strength;
s4, drying and compacting the fiber wadding subjected to cold rolling into a net, and performing hot-pressing compounding on the non-woven fabric serving as the flow guide supporting layer and the hydrophobic supporting layer to form a film through hot-melt double-sided adhesive;
and S5, soaking or washing the filter material obtained in the step S4, washing away residual chemical substances and fiber fragments, and drying and cleaning to obtain the composite filter material with the adsorption function.
10. The method for preparing a composite filter material with an adsorption function according to claim 9, wherein step S2 further comprises a step of promoting normal attachment and growth of the nanomaterial on the mixed fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111376310.XA CN113975894A (en) | 2021-11-19 | 2021-11-19 | Composite filter material with adsorption function and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111376310.XA CN113975894A (en) | 2021-11-19 | 2021-11-19 | Composite filter material with adsorption function and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113975894A true CN113975894A (en) | 2022-01-28 |
Family
ID=79749496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111376310.XA Pending CN113975894A (en) | 2021-11-19 | 2021-11-19 | Composite filter material with adsorption function and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113975894A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544342A (en) * | 2003-11-19 | 2004-11-10 | 吉林大学 | Nanometer water purifying material for removing virus and bacteria, its preparation method and uses |
| CN111467875A (en) * | 2020-04-28 | 2020-07-31 | 南京玻璃纤维研究设计院有限公司 | Nano-cellulose glass fiber composite filter material and preparation method and application thereof |
| CN214209746U (en) * | 2020-11-26 | 2021-09-17 | 西西埃热能(南京)有限公司 | Composite filter material and filter element for liquid filtration |
-
2021
- 2021-11-19 CN CN202111376310.XA patent/CN113975894A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544342A (en) * | 2003-11-19 | 2004-11-10 | 吉林大学 | Nanometer water purifying material for removing virus and bacteria, its preparation method and uses |
| CN111467875A (en) * | 2020-04-28 | 2020-07-31 | 南京玻璃纤维研究设计院有限公司 | Nano-cellulose glass fiber composite filter material and preparation method and application thereof |
| CN214209746U (en) * | 2020-11-26 | 2021-09-17 | 西西埃热能(南京)有限公司 | Composite filter material and filter element for liquid filtration |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ao et al. | Biodegradable all-cellulose composite membranes for simultaneous oil/water separation and dye removal from water | |
| Yuan et al. | Nanocellulose-based composite materials for wastewater treatment and waste-oil remediation | |
| Yang et al. | Antifouling nanocellulose membranes: How subtle adjustment of surface charge lead to self-cleaning property | |
| US7754123B2 (en) | High performance filter media with internal nanofiber structure and manufacturing methodology | |
| Huang et al. | A facile fabrication of chitosan modified PPS-based microfiber membrane for effective antibacterial activity and oil-in-water emulsion separation | |
| CN115155159B (en) | Stabilized filter media comprising nanofibers | |
| KR101752922B1 (en) | Multi-phase filter medium | |
| US11890561B2 (en) | Filter media having a fine pore size distribution | |
| Ni et al. | Synergistic effect on TiO2 doped poly (vinyl alcohol-co-ethylene) nanofibrous film for filtration and photocatalytic degradation of methylene blue | |
| EP0466827A4 (en) | Cationic charge modified filter media and use thereof | |
| CN109046040B (en) | Gradient filter membrane material based on nano-fibers and preparation method thereof | |
| CN107050927B (en) | Oil-water separation net film with composite structure and preparation method thereof | |
| Bai et al. | Efficient and recyclable ultra-thin diameter polyacrylonitrile nanofiber membrane: Selective adsorption of cationic dyes | |
| JP6612624B2 (en) | Semipermeable membrane support and filtration membrane for membrane separation activated sludge treatment | |
| Qiao et al. | Anisotropic cellulose nanocrystalline sponge sheets with ultrahigh water fluxes and oil/water selectivity | |
| CN113750815A (en) | Switchable emulsion type oil-water separation nano antibacterial film and preparation method thereof | |
| He et al. | Anchoring nano-zeolite NaX particles on polydopamine-modified PVDF/PAN electrospun membranes for enhancing interception, adsorption and antifouling performance | |
| CN113975894A (en) | Composite filter material with adsorption function and preparation method thereof | |
| CN214209746U (en) | Composite filter material and filter element for liquid filtration | |
| CN114653221A (en) | Low-nonspecific adsorption virus-removing porous membrane and preparation method thereof | |
| Yang et al. | Nanofiber membranes fabricated by coaxial electrospinning with porous channel structure for high-efficiency oil-water separation | |
| JP6038370B1 (en) | Support for semipermeable membrane for membrane separation activated sludge treatment, filtration membrane and module | |
| JP2019034304A (en) | Substrate for semipermeable membrane for membrane separation activated sludge treatment, filter membrane, and module | |
| CN113144913B (en) | High-permeability anti-fouling nanofiber separation membrane material and preparation method and application thereof | |
| Bigogno et al. | Integrated treatment of mining dam wastewater with quaternized chitosan and PAN/HPMC/AgNO 3 nanostructured hydrophylic membranes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220128 |