CN115069217A - Method for preparing carbon fiber composite material and filter element - Google Patents
Method for preparing carbon fiber composite material and filter element Download PDFInfo
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- CN115069217A CN115069217A CN202210897436.XA CN202210897436A CN115069217A CN 115069217 A CN115069217 A CN 115069217A CN 202210897436 A CN202210897436 A CN 202210897436A CN 115069217 A CN115069217 A CN 115069217A
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28023—Fibres or filaments
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- 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
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Abstract
The invention discloses a method for preparing a carbon fiber composite material and a filter element, wherein the method for preparing the carbon fiber composite material comprises the following steps: adding a scale inhibitor into the graphene oxide solution to obtain a scale inhibition graphene oxide solution; adding carbon fibers into the scale-inhibiting graphene oxide solution, and carrying out wet treatment to obtain the composite material. Thus, the composite material for purifying water having a better scale inhibition performance can be obtained.
Description
Technical Field
The invention relates to the field of water purification, in particular to a method for preparing a carbon fiber composite material and a filter element.
Background
Water purification equipment is widely applied to the fields of drinking, chemical engineering, medical treatment, cultivation, planting, food, beverage and the like. Activated carbon has played an important role in many fields since its birth. However, in the field of water purification, when the powdered activated carbon is used as a filter element material of water purification equipment for the first time, a part of activated carbon powder is dissolved in a filtering water body, so that the filtered water body has a blackening phenomenon, and the user has poor appearance and use experience. Carbon fiber, as a third-generation activated carbon material appearing after powdered activated carbon and granular activated carbon, has gradually become the mainstream choice of filter core materials due to its advantages of porosity, stable structure and the like. However, when the carbon fiber filter element is used for filtering water with complex water quality, the carbon fiber filter element can adsorb fewer kinds of impurities, has long purification time and is complex to operate, and the purified water quality still needs to be further treated to reach the national standard of water purification, so that the strict requirements of the market on water purification equipment are difficult to meet.
Therefore, the current methods and filter elements for preparing carbon fiber composite materials still need to be improved.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
the inventor finds that although the carbon fiber has the advantages of easy regeneration, difficult pulverization and sedimentation, high adsorption speed and high shape plasticity when being used as a filter element material of water purification equipment, such as being prepared into yarn, cloth, felt and paper as required to meet various purposes, the carbon fiber also has the defects of high production cost, poor adsorption capacity for suspended solids and insoluble dyes, easy scaling and blockage of the filter element after long-term use in a water body with complex water quality and the like.
The present invention aims to alleviate or solve at least to some extent at least one of the above mentioned problems.
In one aspect of the present invention, the present invention provides a method of preparing a carbon fiber composite material, comprising: adding a scale inhibitor into the graphene oxide solution to obtain a scale inhibition graphene oxide solution; and adding carbon fibers into the scale-inhibiting graphene oxide solution, and carrying out wet treatment to obtain the carbon fiber composite material. Thus, the composite material for purifying water having a good scale inhibition performance can be obtained.
According to an embodiment of the present invention, the pH of the graphene oxide solution is 6 to 7.5. Thereby, the structural stability of the composite material is possible.
According to the embodiment of the invention, the concentration of the graphene oxide solution is 1-4 g/L. Therefore, the water purification effect of the composite material can be improved.
According to the embodiment of the invention, the concentration of the scale inhibitor in the scale inhibition graphene oxide solution is 8-20 g/L. Therefore, the scale inhibition performance of the composite material in water purification can be improved.
According to an embodiment of the present invention, the scale inhibitor includes at least one of polyaspartate salts, polyepoxysuccinate salts, tripolyphosphate salts, hexametaphosphate salts, hydroxyethylidene diphosphonate salts, aminotrimethylene phosphonate salts, ethylenediamine methylene phosphonate salts, diethylenetriamine pentamethylene phosphonate salts, phosphonobutane tricarboxylate salts, polyacrylate salts, polymaleate salts, phosphonocarboxylate copolymers, and edible black fungus powder. Therefore, the scale inhibition performance of the composite material in water purification can be improved.
According to an embodiment of the invention, the salt comprises at least one of a calcium salt, a sodium salt, a potassium salt and a magnesium salt. Therefore, the pollution of the composite material to water quality during water purification can be reduced.
According to the embodiment of the invention, the mesh number of the scale inhibitor is 120-250 meshes. Thereby, the structural stability and the service life of the composite material can be improved.
According to an embodiment of the present invention, before adding the carbon fibers into the scale inhibiting graphene oxide solution, the method further includes: and carrying out activation treatment on the carbon fiber. This can improve the surface activity of the carbon fiber.
According to an embodiment of the invention, the activation treatment comprises: soaking the carbon fibers in an activator solution, wherein the activator comprises at least one of sulfuric acid, nitric acid, hydrogen peroxide, sodium hydroxide, calcium nitrate, diammonium phosphate, citric acid, and phosphoric acid. This can further improve the surface activity of the carbon fiber.
In another aspect of the invention, the invention provides a filter cartridge comprising: the filter element is made of the carbon fiber composite material prepared by the method. Therefore, the filter element has all the characteristics and advantages of the method for preparing the carbon fiber composite material, and the description is omitted.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic flow diagram of a method of making a carbon fiber composite material according to one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
In one aspect of the present invention, the present invention provides a method of preparing a carbon fiber composite material, comprising: adding the scale inhibitor into the graphene oxide solution, uniformly mixing to prepare a scale inhibition graphene oxide solution, and soaking the carbon fibers in the scale inhibition graphene oxide solution to prepare the high-activity carbon fiber composite material with high adsorption and good scale inhibition performance. Specifically, referring to fig. 1, the method of preparing the composite material may include the steps of:
s100: adding the scale inhibitor into the graphene oxide solution
According to some embodiments of the invention, in this step, the scale inhibitor is added into the graphene oxide solution, and the graphene oxide solution can be obtained after ultrasonic and/or shaking dissolution.
According to some embodiments of the present invention, the pH of the graphene oxide solution is not particularly limited, for example, the pH of the graphene oxide solution may be 6 to 7.5. The inventor finds that when the graphene oxide solution is a neutral solution, the graphene oxide can be well compounded with the carbon fiber to form a composite material. Through a large number of theoretical analyses and experimental researches, the inventor further finds that when the graphene oxide solution is an acidic solution, for example, when the pH is 6 to 7, the graphene oxide and the carbon fiber are better in composite effect, and the formed composite material has better structural stability.
According to some embodiments of the present invention, the concentration of the graphene oxide solution is not particularly limited, and for example, the concentration of the graphene oxide solution may be 1 to 4 g/L. When the concentration of the graphene oxide solution is more than 4g/L, the concentration of the graphene oxide is too high, and the graphene oxide is easy to gather on the surface of the carbon fiber, so that the porous structure on the surface of the carbon fiber is blocked, and a good adsorption effect cannot be realized; when the concentration of the graphene oxide solution is less than 1g/L, the content of graphene oxide attached to the surface of the carbon fiber is too low, and the sterilization effect cannot be well realized through the graphene oxide.
According to some embodiments of the present invention, a method of preparing the above graphene oxide solution is not particularly limited, and for example, the graphene oxide solution may be prepared using Hummers method. Specifically, the following steps may be included: 1g of graphite powder and 0.5g of sodium nitrate are added into 23ml of concentrated sulfuric acid, and 3g of potassium permanganate is slowly added when the graphite powder and the sodium nitrate are stirred in an ice-water bath, so that the reaction temperature is kept below 10 ℃. The mixture was then transferred to an oil bath and stirred at 35 ℃ for 30 minutes. Then, 46ml of ultrapure water was added to the mixture, and the solution became brown. Then stirring the mixture in a water bath kettle at the temperature of 98 ℃ for 30 minutes, adding 140ml of warm ultrapure water and 2.5ml of hydrogen peroxide, changing the color of the solution from brown to yellow, centrifugally separating the obtained solution, alternately washing the solution with ultrapure water and absolute ethyl alcohol until the pH value of the solution is neutral, and then ultrasonically diluting the graphene oxide solution to 1-4 g/L.
According to some embodiments of the present invention, the concentration of the scale inhibitor in the scale-inhibiting graphene oxide solution obtained by adding the scale inhibitor to the graphene oxide solution is not particularly limited, for example, the concentration of the scale inhibitor in the scale-inhibiting graphene oxide solution may be 8 to 20 g/L. When the concentration of the scale inhibitor in the scale inhibition graphene oxide solution is less than 8g/L, the concentration of the scale inhibitor is low, and the effect of inhibiting the growth of scale during filtration is poor; when the concentration of the scale inhibitor in the scale inhibition graphene oxide solution is more than 20g/L, the concentration of the scale inhibitor is too high, so that the porous structure on the surface of the carbon fiber is easily blocked, and the carbon fiber cannot realize a good adsorption effect.
According to some embodiments of the present invention, the kind of the scale inhibitor is not particularly limited, for example, the scale inhibitor may include at least one of polyaspartate, polyepoxysuccinate, tripolyphosphate, hexametaphosphate, hydroxyethylidene diphosphonate, aminotrimethylene phosphonate, ethylenediamine methylene phosphonate, diethylenetriamine pentamethylene phosphonate, phosphonobutane tricarboxylate, polyacrylate, polymaleate, phosphonocarboxylate copolymer, and edible black fungus powder, so that the composite material may have a good scale inhibition performance in purifying water by the addition of the bio-friendly scale inhibitor. Further, according to other embodiments of the present invention, the inventors have found that when the scale inhibitor is simultaneously selected from at least two kinds within the above range, the scale inhibition performance of the prepared composite material is more excellent in purifying water.
According to some embodiments of the present invention, the selection of the salt in the scale inhibitor is not particularly limited, for example, the salt in the scale inhibitor may include at least one of a calcium salt, a sodium salt, a potassium salt, and a magnesium salt. When the salts in the scale inhibitor are salts in the range, the elements of the scale inhibitor are all common metal elements in the water body, and metal elements which influence human health, such as heavy metal elements and the like, are not additionally introduced into the water body by adding the scale inhibitor, so that the pollution of the composite material to water quality during water purification can be effectively reduced, and the safety of the composite material during water purification is greatly improved.
According to some embodiments of the present invention, the particle size of the scale inhibitor is not particularly limited, for example, the mesh number of the scale inhibitor may be 120-250 mesh, and when the mesh number of the scale inhibitor is 120-250 mesh, the dispersibility of the scale inhibitor in the graphene oxide solution is better, so as to facilitate the subsequent compounding with the carbon fiber. When the mesh number of the scale inhibitor is larger than 250 meshes, the particle size of the scale inhibitor is too small, and the stability of the scale inhibitor and the carbon fiber after compounding is poor, so that the service life of the scale inhibition performance of the composite material is short; when the mesh number of the scale inhibitor is less than 120 meshes, the particle size of the scale inhibitor is too large, the scale inhibitor is difficult to compound into the porous structure of the carbon fiber, and the porous structure of the carbon fiber is easy to block after being compounded into the porous structure of the carbon fiber, so that a good adsorption effect cannot be realized.
It can be understood that, the above-mentioned compounding of the scale inhibitor to the inside of the porous structure of the carbon fiber means that a small amount of the scale inhibitor is arranged inside the porous structure of the carbon fiber, but the porous structure of the carbon fiber is not blocked, and the scale inhibitor only needs to partially fill part of the porous structure on the surface of the carbon fiber, but does not need to be arranged inside all the porous structures of the carbon fiber, so that a good scale removal effect can be achieved.
S200: adding carbon fibers into a scale inhibition graphene oxide solution, and carrying out wet treatment
According to some embodiments of the invention, the carbon fiber is added into the scale-inhibiting graphene oxide solution in the step, and the carbon fiber composite material with better scale removal performance can be obtained through wet treatment.
According to some embodiments of the present invention, the process of the wet treatment is not particularly limited, and for example, the wet treatment may include the steps of: soaking carbon fibers in the scale inhibition graphene oxide solution, carrying out ultrasonic and/or oscillation treatment, then pulling the carbon fibers from the scale inhibition graphene oxide solution, repeating the ultrasonic and/or oscillation and pulling operations for multiple times, namely compounding the scale inhibitor and the graphene oxide onto the carbon fibers, and then baking to obtain the composite material. According to other embodiments of the present invention, the time of the ultrasonic and/or shaking treatment is not particularly limited, for example, the time of the ultrasonic and/or shaking treatment may be 1 to 4 hours later; the ultrasonic and/or oscillation treatment and the pulling treatment are/is adopted as one cycle, the cycle number is not particularly limited, for example, the cycle operation can be repeated for 4-6 times to obtain the composite material with better composite effect of the scale inhibitor and the graphene oxide.
According to some embodiments of the present invention, the process of the wet treatment is not particularly limited, and for example, the wet treatment may include the steps of: soaking carbon fibers (for example, carbon fibers broken into filaments) in the scale-inhibiting graphene oxide solution, then winding the carbon fibers containing the scale-inhibiting graphene oxide on a mold through external force (for example, vacuumizing treatment can be adopted), correcting the carbon fibers by using a smooth cylinder to ensure the uniformity of the size, and then baking to obtain the composite material.
According to some embodiments of the present invention, in order to further improve the composite effect of the composite material, before adding the carbon fiber into the scale-inhibiting graphene oxide solution, the method may further include: and (3) carrying out activation treatment on the carbon fiber. The dry process is characterized in that the carbon fiber precursor is subjected to pretreatment, carbonization and other steps, so that nano-scale holes are generated on the surface of the carbon fiber, the specific surface area is obviously improved, the carbon fiber prepared by the dry process is low in activity of functional groups on the surface, and the activity of the functional groups on the surface of the carbon fiber can be improved by activation treatment.
According to some embodiments of the present invention, the method of the activation treatment is not particularly limited, and for example, the activation treatment may include: the carbon fiber is soaked in an activator solution, wherein the kind of the activator is not particularly limited, and for example, the activator may include at least one of sulfuric acid, nitric acid, hydrogen peroxide, sodium hydroxide, calcium nitrate, diammonium phosphate, citric acid, and phosphoric acid. According to other embodiments of the present invention, the concentration of the activator solution may be 0.1 to 1M. Specifically, the activation treatment may include: soaking the carbon fiber in an activating agent solution for ultrasonic treatment for 4-6h, then washing the carbon fiber to be neutral, drying the carbon fiber in the atmosphere, and naturally cooling the carbon fiber for standby application, wherein the atmosphere can be at least one of nitrogen, helium and argon, and the oxygen-free atmosphere can be selected to reduce the occurrence of other side reactions between the carbon fiber surface functional groups and gases in the drying process, so that the activity of the functional groups is reduced.
According to some embodiments of the present invention, the shape of the composite material prepared by the wet process is not particularly limited, and for example, the shape of the composite material may be a roll film, a sheet, or a block.
In another aspect of the invention, the invention provides a filter cartridge comprising: the filter element is made of the carbon fiber composite material prepared by the method. Therefore, the filter element has all the characteristics and advantages of the method for preparing the carbon fiber composite material, and the description is omitted.
The following embodiments are provided to illustrate the present application, and should not be construed as limiting the scope of the present application. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1:
1. activation treatment: soaking the carbon fiber in 0.1M sulfuric acid solution for ultrasonic treatment for 4h, then washing with water to neutrality, drying at 70 ℃ in nitrogen atmosphere, and naturally cooling for later use.
2. Preparing a scale inhibition graphene oxide solution: mixing a scale inhibitor: mixing sodium hydroxyethylidene diphosphonate and sodium phosphonobutane tricarboxylate in a mass ratio of 1:4, and crushing into 150 meshes; and then adding the scale inhibitor into a graphene oxide solution with the graphene oxide concentration of 2g/L for ultrasonic mixing to prepare a scale inhibition graphene oxide solution with the scale inhibitor concentration of 13 g/L.
3. Soaking the activated carbon fiber in a scale inhibition graphene oxide solution, oscillating, lifting, carrying out ultrasonic treatment for 2 hours, lifting, repeating the operation for 4 times, and drying at 65 ℃ to obtain the carbon fiber composite material.
4. Cutting the obtained carbon fiber composite material into carbon fiber sheets.
Example 2:
example 2 was identical to example 1, except that,
the activating agent is 0.1M sodium hydroxide solution, and the activating time is 3 h.
The scale inhibitor is prepared by mixing itaconic acid calcium methylenesuccinate and phosphonobutane tricarboxylic acid calcium powder in a mass ratio of 1: 3; preparing a scale inhibition graphene oxide solution with the scale inhibitor concentration of 12 g/L.
Cutting the obtained carbon fiber composite material into carbon fiber blocks.
Example 3:
example 3 was identical to example 1, except that,
the activating agent is 0.1M nitric acid solution, and the activating time is 3 h.
The scale inhibitor is prepared by mixing itaconic acid methylene magnesium succinate and hydroxyl ethylidene magnesium diphosphate according to the mass ratio of 1:3, and crushing into 120 meshes.
And preparing the obtained carbon fiber composite material into a carbon fiber roll film.
Example 4:
example 4 was identical to example 1, except that,
the activating agent is 0.1M citric acid solution, and the activating time is 3 h.
The scale inhibitor is prepared by mixing amino trimethylene calcium phosphonate and itaconic acid methylene calcium succinate in a mass ratio of 2: 3; preparing a scale inhibition graphene oxide solution with the scale inhibitor concentration of 14 g/L.
And preparing the obtained carbon fiber composite material into a carbon fiber block.
Example 5:
example 5 was identical to example 1, except that,
the scale inhibitor is sodium hydroxyethylidene diphosphonate, and is prepared into a scale inhibiting graphene oxide solution with the scale inhibitor concentration of 14 g/L.
Comparative example 1:
1. activation treatment: soaking the carbon fiber in 0.1M sodium hydroxide solution for ultrasonic treatment for 3h, then washing with water to neutrality, drying at 70 ℃ in nitrogen atmosphere, and naturally cooling for later use.
2. Soaking the activated carbon fiber in a graphene oxide solution, oscillating, lifting, carrying out ultrasonic treatment for 2 hours, lifting, repeating the operations for 4 times, and drying at 65 ℃ to obtain the carbon fiber composite material.
3. Cutting the obtained carbon fiber composite material into carbon fiber sheets.
The scale inhibition performance of the carbon fiber composite materials in examples 1-5 and comparative example 1 was tested according to GB/T16632-.
TABLE 1
| Flow (L) | Scale inhibition Rate (%) | |
| Comparative example 1 | 100 | 12 |
| Example 1 | 800 | 97 |
| Example 2 | 900 | 91 |
| Example 3 | 850 | 92 |
| Example 4 | 880 | 95 |
| Example 5 | 350 | 20 |
The results are shown in table 1 and the test results show that: the scale inhibitor is added into the carbon fiber composite material in the embodiments 1 to 5, wherein two scale inhibitors are added into the carbon fiber composite material in the embodiments 1 to 4, one scale inhibitor is added into the carbon fiber composite material in the embodiment 5, the flow rate and the scale inhibition rate of the carbon fiber composite material in the embodiments 1 to 4 are both greater than the scale inhibition rate of the carbon fiber composite material in the embodiment 5, specifically, the carbon fiber composite material in the embodiments 1 to 4 still has the scale inhibition rate higher than 90% when the flow rate is greater than 800L, the carbon fiber composite material in the embodiment 5 still has the scale inhibition rate of 20% when the flow rate is 350L, the carbon fiber composite material in the invention has higher water purification amount in unit time and also has higher scale inhibition rate, thereby, the quality of purified water can be obviously improved, and the water purification efficiency and the water purification effect are both better, can better meet the use requirement. The scale inhibition rate of the carbon fiber composite material in the comparative example 1 is only 12% under the flow of 100L, and both the water purification efficiency and the water purification effect are poor, so that the use requirement cannot be met. In conclusion, when two scale inhibitors are added into the carbon fiber composite material, the scale inhibition effect is superior to that when only one scale inhibitor is added into the carbon fiber composite material; when only one scale inhibitor is added into the carbon fiber composite material, the scale inhibition effect of the scale inhibitor is superior to that of the carbon fiber composite material without the scale inhibitor.
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. All patents and publications referred to herein are incorporated by reference in their entirety. The term "comprising" or "comprises" is open-ended, i.e. comprising what is specified in the present invention, but not excluding other aspects. In the present invention, all numbers disclosed herein are approximate values, regardless of whether the word "about" or "approximately" is used. There may be differences below 10% in the value of each number or reasonably considered by those skilled in the art, such as differences of 1%, 2%, 3%, 4% or 5%.
It should be specifically noted that the term "chemical composition is the same" in the present application should be construed broadly, that is, the two main components have the same chemical composition, or the two main components have the same chemical composition, and may have errors or impurities within the allowable range, which can be understood by those skilled in the art.
In the description herein, references to the description of "one embodiment," "another embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. In addition, it should be noted that the terms "first" and "second" in this specification are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
In the description of this application, "a and/or B" may include the case of a alone, the case of B alone, or any of the cases of a and B, wherein A, B is merely an example, which may be any feature of the "and/or" connection "used in this application.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method of making a carbon fiber composite, comprising:
adding a scale inhibitor into the graphene oxide solution to obtain a scale inhibition graphene oxide solution;
and adding carbon fibers into the scale-inhibiting graphene oxide solution, and carrying out wet treatment to obtain the carbon fiber composite material.
2. The method of claim 1, wherein the graphene oxide solution has a pH of 6-7.5.
3. The method according to claim 1, wherein the concentration of the graphene oxide solution is 1-4 g/L.
4. The method of claim 1, wherein the concentration of the scale inhibitor in the scale inhibiting graphene oxide solution is 8-20 g/L.
5. The method of claim 1, wherein the scale inhibitor comprises at least one of polyaspartates, polyepoxysuccinates, tripolyphosphates, hexametaphosphates, hydroxyethylidene diphosphonates, aminotrimethylene phosphonates, ethylenediamine methylene phosphonates, diethylenetriamine pentamethylene phosphonate, phosphonobutane tricarboxylates, polyacrylates, polymaleates, phosphonocarboxylate copolymers, and edible black fungus powder.
6. The method of claim 5, wherein the salt comprises at least one of a calcium salt, a sodium salt, a potassium salt, and a magnesium salt.
7. The method as claimed in claim 5, wherein the mesh size of the scale inhibitor is 120-250 mesh.
8. The method of claim 1, wherein the adding carbon fibers to the scale inhibiting graphene oxide solution further comprises: and carrying out activation treatment on the carbon fiber.
9. The method according to claim 8, wherein the activation treatment comprises: soaking the carbon fibers in an activator solution, wherein the activator comprises at least one of sulfuric acid, nitric acid, hydrogen peroxide, sodium hydroxide, calcium nitrate, diammonium phosphate, citric acid, and phosphoric acid.
10. A filter cartridge, comprising: the filter element has a carbon fiber composite material prepared by the method of any one of claims 1 to 9.
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