KR101939991B1 - High performance collecting filter for pollution material and manufacturing method thereof - Google Patents
High performance collecting filter for pollution material and manufacturing method thereof Download PDFInfo
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- KR101939991B1 KR101939991B1 KR1020170057365A KR20170057365A KR101939991B1 KR 101939991 B1 KR101939991 B1 KR 101939991B1 KR 1020170057365 A KR1020170057365 A KR 1020170057365A KR 20170057365 A KR20170057365 A KR 20170057365A KR 101939991 B1 KR101939991 B1 KR 101939991B1
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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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
- B01D2239/025—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanofibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0471—Surface coating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
Abstract
The present invention relates to a filter for collecting harmful substances that increases the chemical bonding force between a subject material and nanofibers, including surface treated nanofibers, and a method for producing the same. More particularly, the present invention relates to a nanofiber- And by changing the chemical structure, the collection ability can be improved.
Description
The present invention relates to a filter for collecting harmful substances and a method for producing the same, and more particularly, to a filter for enhancing the chemical bonding force between a substance and a nanofiber including a surface-treated nanofiber, To improve the ability to collect harmful substances.
A filter is defined as a thin film that filters foreign substances in liquids and gases. Generally, the method of removing harmful substances including fine dust in the gas can be classified into an electric dust collecting type and a dry type and a wet type filter type.
Electrostatic dust collecting type electrifies fine dust in air and attracts dust by using force like static electricity. It is selectively filled with (+) and (), attracting dust to a parallel and dense metal dust collecting plate. As a result, the collected fine dust is aggregated into a mass by the molecular cohesive force.
The electrostatic precipitator has a simple internal structure and low noise. When the fan of the same capacity is used, there is no need to replace the filter due to a large amount of air after dust collection. However, it is necessary to periodically clean the metal dust collecting plate collecting the dust, and there is a drawback that the dust collecting effect is required when the power is supplied and the installation space is wide.
The dry filter type uses a cloth or paper containing a small hole to filter the dust present in the air, such as a filter paper. The type of filter can be classified into PreFilter, Medium Filter, HEPA (0.3 micrometer) and ULPA (0.12 micrometer) according to how small dust can be filtered out.
The HEPA and ULPA filters have a drawback in that a large power is required for the HEPA and ULPA filters because the holes through which the air passes are very small to filter fine dust, but the force for passing air is very large and glass fiber dust is generated in the manufacture of the filter.
The wet type filter filter removes dust by combining water droplets and dust by spraying water such as water with small water vapor as if spraying with an atomizer, or removes dust by contact of water and dust by absorbing water such as filter . However, the wet type filter has a disadvantage in that the efficiency is low at a high air velocity.
In order to solve the disadvantages of the conventional filters as described above, various methods for manufacturing nano-sized fibers and applying them to filters are being studied. The nanofiber-based filter has the advantage that the specific surface area is very large compared with the filter media of the conventional filter having a large diameter, and the pressure loss of the air is small and flexible. However, nanofiber-based filters have limitations that make it difficult to control conditions for production and performance improvement.
In the prior art (Korean Patent Laid-Open Publication No. 1020110049952), the electrospun nanofibers are formed into a chip shape by primary heat treatment and crushing, and a mixed catalyst is formed by mixing the nanofibers of the chip- The present invention relates to a mixed catalyst filter having pores by heat treatment. However, such a conventional catalyst has a disadvantage in that the production process is complicated, and there is a limitation that an additional catalyst is essential.
In addition, although the prior art (US Patent Publication No. 2016/0166959) describes an air filter for coating organic fibers with a conductive material, the coating of the organic fibers has no effect on the chemical bonding force between the fine dust There is a limitation that it does not exceed.
An object of the present invention is to provide a harmful substance trapping filter capable of improving the performance of a conventional nanofiber filter by increasing the chemical bonding force between a harmful substance (object substance) including fine dust and a nanofiber, Method.
It is another object of the present invention to provide an air purification filter having excellent ability to collect harmful substances including fine dust, and a filter for removing harmful substances capable of providing an air purification device using the air purification filter.
Another object of the present invention is to provide a harmful material trapping filter capable of ensuring a smooth airflow by reducing the diameter of the nanofiber by surface-treating the nanofiber, and a manufacturing method thereof.
It is another object of the present invention to provide a filter for collecting harmful substances and a method for producing the filter, which can increase the collecting power by changing the physical and chemical structure of the nanofibers without using a catalyst after the surface treatment of the nanofibers.
Another object of the present invention is to provide a filter for collecting harmful substances and a method for producing the same, which can extend the lifetime of the filter by increasing the specific surface area due to reduction in diameter of the surface-treated nanofibers when the same power is used.
A method of manufacturing a harmful substance trapping filter according to an embodiment of the present invention includes forming a nanofiber and surface-treating the nanofiber to increase a chemical bonding force between the nanofiber and a target material, And treating the nanofibers to induce a change in physical and chemical properties of the nanofibers to enhance the collecting power.
In addition, the method for manufacturing a harmful material trapping filter according to an embodiment of the present invention may further include applying the surface treated nanofibers to a filter.
The surface treatment may increase the specific surface area of the nanofiber by reducing the diameter of the nanofiber, thereby minimizing air pressure loss.
The surface treatment may induce a change in properties of the nanofiber by subjecting the nanofiber to a surface treatment by reactive ion etching (RIE).
The surface treatment may increase the chemical bonding force by increasing the dipole moment by forming an amide group (CONH), an ester group (COOR), and a carboxyl group (COOH) on the nanofiber by surface-treating the reactive ion etching.
The surface treatment may improve the trapping ability according to the increase of the chemical bonding force between the target substance and the nanofibers by controlling the condition of the surface treatment.
The surface treatment may induce a change in the properties of the nanofibers by subjecting the nanofibers to a surface treatment of a thermal annealing process.
The surface treatment may induce a change in properties of the nanofibers by subjecting the nanofibers to a surface treatment with a plasma coating.
The surface treatment may include surface-treating the self-assembled monolayer (SAM), which is patterned on the nanofibers to form a plurality of lines, to induce a change in the properties of the nanofibers.
The surface treatment may induce a change in properties of the nanofiber by subjecting the nanofiber to surface treatment with conductive nanoparticle coating or substitution.
The harmful substance trapping filter according to an embodiment of the present invention is characterized in that the harmful substance trapping filter including nanofiber includes the nanofiber surface-treated so as to increase the chemical bonding force between the target substance and the nanofiber .
The surface-treated nanofibers are reduced in diameter by the surface treatment, and the specific surface area increases, so that the pressure loss of the air can be minimized.
The surface-treated nanofibers can be changed in physical and chemical properties by the surface treatment of reactive ion etching (RIE).
The surface-treated nanofibers can be changed in physical and chemical properties by the surface treatment of a thermal annealing process.
The surface-treated nanofibers can be changed in physical and chemical properties by the surface treatment of the plasma coating.
The surface-treated nanofibers may be patterned to change the physical and chemical properties of the self-assembled monolayer (SAM) forming a plurality of lines by the surface treatment.
The surface-treated nanofibers can be changed in physical and chemical properties by the surface treatment of conductive nanoparticle coating or substitution.
The harmful substance collecting filter according to another embodiment of the present invention is characterized by including a filter surface-treated so as to increase a chemical bonding force with a target substance.
According to the embodiment of the present invention, the surface of the nanofiber can be treated to increase the chemical bonding force between the nanofiber and the harmful substance including the fine dust, thereby improving the performance of the conventional nanofiber filter.
In addition, according to the embodiment of the present invention, it is possible to provide an air purifying filter excellent in the ability to collect harmful substances including fine dust and an air purifying apparatus to which the air purifying filter is applied.
In addition, according to the embodiment of the present invention, the diameter of the nanofibers can be reduced by surface-treating the nanofibers to ensure smooth airflow.
In addition, according to the embodiment of the present invention, the physical and chemical structure of the nanofiber can be changed without using a catalyst by surface treatment on the nanofiber, thereby improving the collecting ability.
Further, according to the embodiment of the present invention, when the same power is used, the lifetime of the filter can be extended by increasing the specific surface area due to reduction in diameter of the surface-treated nanofibers.
In addition, according to the embodiment of the present invention, the surface treatment technology of the nanofiber improves the chemical binding force with the harmful substance and the physical change due to the reduction of the diameter of the nanofiber, thereby improving the ability to collect harmful substances, It is possible to expect smooth flow of air (minimization of pressure loss) and an effect of increasing the life of the filter at the same time.
1 is a flowchart of a method for manufacturing a harmful substance trapping filter according to an embodiment of the present invention.
FIGS. 2A and 2B illustrate examples of nanofibers included in a harmful substance trapping filter according to an embodiment of the present invention.
FIG. 3 is a graph illustrating a change in performance of the surface-treated nanofibers according to an embodiment of the present invention.
FIG. 4 is a graph showing an image result of a change in characteristics of the surface-treated nanofibers according to an embodiment of the present invention.
FIG. 5 shows the results of surface modification of the surface-treated nanofibers according to an embodiment of the present invention.
6 is a graph showing changes in the contact angle of the nanofibers before and after the surface treatment according to the embodiment of the present invention.
FIG. 7 shows a change in performance of a filter including a surface-treated nanofiber according to an embodiment of the present invention.
Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. In addition, the same reference numerals shown in the drawings denote the same members.
Also, terminologies used herein are terms used to properly represent preferred embodiments of the present invention, which may vary depending on the viewer, the intention of the operator, or the custom in the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.
1 is a flowchart of a method for manufacturing a harmful substance trapping filter according to an embodiment of the present invention.
Referring to FIG. 1, a nanofiber is formed in
For example, nanofibers are microfibers having diameters of only a few tens to a few nanometers (nm), and can be used as filters because of their surface area relative to volume. Here, the material and the kind of the nanofibers are not limited. According to an embodiment of the present invention, a method of manufacturing a harmful substance trapping filter according to an embodiment of the present invention may use a membrane or a micro fiber in a range larger than that of the nanofiber, but the nanofiber will be mainly described in the present invention.
In accordance with an embodiment,
In
In
For example, step 120 may be a step of inducing a property change of the nanofibers by surface-treating the nanofibers with reactive ion etching (RIE).
Specifically, Step 120 can increase the chemical bonding force due to an increase in dipole moment by forming an amide group (CONH), an ester group (COOR) and a carboxyl group (COOH) on the nanofiber by surface treatment of reactive ion etching, Can be adjusted to improve the trapping ability due to the increase in the chemical bonding force between the target substance and the nanofibers.
The reactive ion etching (RIE) was carried out under conditions of 50 sccm, 50 W, 100 mtorr in 30 seconds, 1 cycle, 2 cycles and 3 cycles in the oxygen (O 2 ) atmosphere (gas type and flow rate, .
Depending on the embodiment, the process sequence of reactive ion etching loads the specimen, identifies the loaded specimen in the chamber, and then sets the reactive ion etch environment conditions (such as degree of vacuum, type and amount of gas) set. For example, the reactive ion etch environment conditions can be set in a chamber by flowing oxygen gas (O 2 gas) at a predetermined degree of vacuum (100 mtorr) at 50 sccm.
Thereafter, the plasma is floated at an output of 50W, surface treatment is performed, and the specimen is recovered. From the results of the surface treatment, the surface of the nanofiber is changed to be hydrophilic, and the thickness (diameter) of the nanofiber is decreased.
Accordingly, the method of manufacturing a harmful substance trapping filter according to an embodiment of the present invention can induce a physical and chemical property change of the nanofibers by performing surface treatment of reactive ion etching on the nanofibers.
Here, the change in the physical properties is a decrease in the thickness (diameter) of the nanofibers, so that the thickness (diameter) of the nanofibers decreases, thereby ensuring smooth air flow to the filter. Also, when the same power is used, the collecting efficiency can be improved, and the life of the filter can be extended by increasing the specific surface area.
In addition, the change of the chemical property increases the attractivity and hydrophilicity of the target substance, thereby providing the effect of improving the trapping ability (trapping force or adsorption force) of the target substance.
The target material may be a harmful substance in the air such as fine dust, and is not limited to the concentration of fine dust, suspended dust (fine dust, PM10), or ultrafine dust (PM2.5).
Step 120 may be a step of inducing a change in properties of the nanofibers by surface-treating the nanofibers with a thermal annealing process.
According to an embodiment, the heat treatment process is performed under an inert atmosphere such as nitrogen and argon, and may be performed at a temperature of 275 ° C to 750 ° C. Also, the heat treatment step may be performed at a heating rate of 7 ° C / min to 20 ° C / min under atmospheric pressure conditions and at a cooling rate of 5 ° C / min to 20 ° C / min for 1 to 2 hours. However, the time and temperature of the heat treatment process may vary according to various embodiments, and thus the present invention is not limited thereto.
Step 120 is a surface treatment of the nanofibers in a heat treatment process, and after the heat treatment, the diameter and length of the nanofibers can be significantly reduced by the carbonization of the polymer than before the heat treatment.
Step 120 may be a step of inducing a change in properties of the nanofibers by surface-treating a plasma coating for plasma-vapor-depositing a mixed gas on the nanofibers.
For example, the plasma coating is a fluorocarbon (CF 4), argon (Ar), xenon (Ze), helium (He), nitrogen (N 2) and oxygen (O 2) any one or a mixture of these gases in the A plasma vapor deposition can be performed on the nanofibers.
Accordingly, the surface-treated nanofibers of the plasma coating can be activated on the surface to induce a change in chemical properties, and the hydrophilicity can be improved by the oxygen plasma coating.
Step 120 may be a step of surface-treating a self-assembled monolayer (SAM) that is patterned on the nanofibers to form a plurality of lines, thereby inducing a change in characteristics of the nanofibers.
The surface treatment of the self-assembled monolayer is an organic monolayer formed spontaneously, for example, by using a spontaneous reaction between a surface on which a hydroxy functional group is present and a silane to fix a portion bonded to the silane on the surface.
Step 120 may be a step of inducing a change in properties of the nanofiber by coating or substituting the surface of the nanofibers with conductive nanoparticles.
The method of manufacturing a harmful substance trapping filter according to an embodiment of the present invention is to increase the chemical bonding force with a target material according to changes in physical and chemical properties by surface treatment of nanofibers.
Accordingly, the surface treatment method using at least one of the reactive ion etching, the heat treatment, the plasma coating, the self-assembled monolayer, and the conductive nanoparticles described above is preferably used in a process commonly used in the market. However, And other processes or methods for changing the chemical properties may be applied.
A method of manufacturing a harmful material trapping filter according to an embodiment of the present invention may include applying the surface treated nanofibers to a filter (step 130).
For example, step 130 may be the step of applying the surface treated nanofibers to the filter support.
FIGS. 2A and 2B illustrate examples of nanofibers included in a harmful substance trapping filter according to an embodiment of the present invention.
More specifically, FIG. 2A illustrates an example of a surface treatment of a nanofiber included in a harmful substance trapping filter according to an embodiment of the present invention, FIG. 2B illustrates a process of treating a single nanofiber in the process performed in FIG. FIG.
The harmful
2A and 2B, the
The
For example, the surface-treated
Accordingly, the harmful
Here, the change in the physical properties is a decrease in the thickness (diameter) of the surface-treated
In addition, the change in the chemical characteristics increases the attractive force and hydrophilicity between the target material and the surface-treated
However, the surface treatment method (A) using at least one of the reactive ion etching, the heat treatment, the plasma coating, the self-assembled monolayer, and the conductive nanoparticle described above is preferably used in a process generally used in the market, Other processes or methods for changing the physical and chemical properties of the
FIG. 3 is a graph illustrating a change in performance of the surface-treated nanofibers according to an embodiment of the present invention.
More specifically, FIG. 3 shows the change in performance for a non-surface treated nanofiber (without RIE treatment) and a change in performance for a surface treated nanofiber (30s RIE treatment) of reactive ion etching (RIE) for 30 seconds Were measured. In addition, the change in performance of the reactive ion etching (RIE) surface treated nanofiber (60s RIE treatment) for 60 seconds was measured, and the surface treated nanofiber (90s RIE treatment) for reactive ion etching (RIE) Were measured.
Here, the surface treatment for 30 seconds was taken as one cycle, and 60 seconds for 2 cycles and 90 seconds for 3 cycles.
Referring to FIG. 3, the x-axis (Operational time) of the graph represents time and the y-axis (Residual PM 2.5 concentration in chamber) represents the value of residual concentration of fine dust (target material) in the closed chamber.
As shown in FIG. 3, the value of the fine dust residual concentration in the closed chamber was decreased with time of the surface treatment of 0 second, 30 seconds, 60 seconds, and 90 seconds, and it was confirmed that the fine dust collecting performance of the nanofiber was improved have. Further, it can be confirmed that the collection time of the fine dust is shortened (the fine dust is collected more and more quickly) according to the time of the surface treatment.
Accordingly, the method of manufacturing a harmful material trapping filter according to an embodiment of the present invention can produce nanofibers having enhanced collecting power in proportion to an increase in the time of surface treatment of reactive ion etching (RIE).
FIG. 4 is a graph showing an image result of a change in characteristics of the surface-treated nanofibers according to an embodiment of the present invention.
More specifically, Figure 4 shows image results for nanofibers in which physical and chemical properties are changed by surface treatment.
FIG. 4A shows an image of a non-surface treated nanofiber (without RIE treatment), and FIG. 4B shows an image of a surface treated nanofiber (30s RIE treatment) of reactive ion etching (RIE) for 30 seconds It is. 4C shows an image of a surface treated nanofiber (60s RIE treatment) of reactive ion etching (RIE) for 60 seconds, and FIG. 4D shows an image of a surface treated nano fiber (RIE) Fiber (90 s RIE treatment).
Here, the surface treatment for 30 seconds was taken as one cycle, and 60 seconds for 2 cycles and 90 seconds for 3 cycles.
The mean diameter of the non-surface treated nanofibers in FIG. 4A is 449 43 nm, and the average diameter of the surface-treated nanofibers of reactive ion etching (RIE) for 30 seconds in FIG. 4B is 410 39 nm .
In addition, the mean diameter of the surface-treated nanofibers of reactive ion etching (RIE) for 60 seconds in FIG. 4C is 347 43 nm, and the surface treated nanofibers of reactive ion etching (RIE) for 90 seconds in FIG. Shows an average diameter of 305 ± 37 nm.
Accordingly, the method of manufacturing a harmful material trapping filter according to an embodiment of the present invention can produce a nanofiber having a reduced diameter (thickness) in proportion to an increase in time of surface treatment of reactive ion etching (RIE).
FIG. 5 shows the results of surface modification of the surface-treated nanofibers according to an embodiment of the present invention.
More specifically, FIG. 5A shows the results of surface-modified XPS (Xray Photoelectron Spectroscopy) data of non-surface treated nanofibers, and FIG. 5B shows the results of surface-treated nanofibers of reactive ion etching (RIE) FIG. 5C shows the results of surface-modified XPS data, and FIG. 5C shows the results of surface-modified XPS data of surface-treated nanofibers of reactive ion etching (RIE) for 90 seconds.
Here, the surface treatment for 30 seconds was regarded as one cycle, and the surface treatment for 30 seconds was performed for three cycles in Fig. 5C.
Referring to FIG. 5, the x-axis (binding energy) of the graph represents binding energy, and the y-axis (intensity) represents intensity.
As shown in FIG. 5, it can be confirmed that graphs of the amide group (CONH), the ester group (COOR) and the carboxyl group (COOH) formed on the nanofiber vary with the surface treatment time of 0 second, 30 seconds and 90 seconds . From this, it can be seen that a chemical change of surface-treated nanofibers of reactive ion etching (RIE) is induced.
The conventional technique of coating the existing organic fibers with a conductive material has no chemical change on the surface of the nanofibers, so that there is no change in the graph as shown in Fig.
Meanwhile, the manufacturing method of the harmful material collecting filter according to the embodiment of the present invention is characterized in that the chemical change (increase in chemical bonding force with the target substance) and the physical change Reduction in air pressure loss, and prolongation of life) are simultaneously generated, and the performance of the filter can be improved accordingly.
6 is a graph showing changes in the contact angle of the nanofibers before and after the surface treatment according to the embodiment of the present invention.
More specifically, FIG. 6A shows the contact angle with respect to the non-surface treated nanofibers, and FIG. 6B shows the contact angle with respect to the surface-treated nanofibers of reactive ion etching (RIE).
The average contact angle of the non-surface treated nanofibers in FIG. 6A with respect to water is 82 or more, and the average contact angle with respect to water of the surface-treated nanofibers of reactive ion etching (RIE) in FIG. 6B is less than 10.
As shown in FIG. 6, it can be seen that the nanofiber without surface treatment has higher hydrophobicity than the surface-treated nanofiber with reactive ion etching (RIE).
Accordingly, the method for manufacturing a harmful material trapping filter according to an embodiment of the present invention can produce a nanofiber with improved hydrophilicity by surface treatment of reactive ion etching (RIE) The collecting power for the water can be improved.
FIG. 7 shows a change in performance of a filter including a surface-treated nanofiber according to an embodiment of the present invention.
More specifically, FIG. 7 shows the surface of treated nanofibers (30s surface treatment) of non-surface treated nanofibers (0 second), reactive ion etching (RIE) for 30 seconds, surfaces of reactive ion etching (RIE) The fine dust collecting efficiency, the pressure loss, the reference value, the contact value, and the performance index for the treated nanofibers (60s surface treatment) and the surface treated nanofibers (90s surface treatment) of reactive ion etching (RIE) The experimental results are shown in the table.
Referring to FIG. 7, the fine dust collecting efficiency of the nanofibers is increased, the pressure loss is decreased, and the WHO (PM2.5) value of fine dust (PM2.5) is increased according to the surface treatment time of 0 second, 30 seconds, 60 seconds and 90 seconds (25ug / m < 3 >) of the World Health Organization (WHO).
In addition, it is shown that the contact angle greatly decreases to an unmeasurable level (hydrophilicity) at 83 °, and it can be expressed as a performance index value (QF) of the air filter, It increases to 0.1564 with the time of the surface treatment of the second.
Accordingly, the method of manufacturing a harmful material trapping filter according to an embodiment of the present invention increases fine dust collecting efficiency, decreases pressure loss, and decreases the value of WHO reference value by increasing the time of surface treatment of reactive ion etching (RIE) The time to reach is reduced, and the figure of merit value can be increased to produce nanofibers.
Therefore, by using the surface-treated nanofibers, it is possible to manufacture a filter having an increased collection force by increasing the chemical bonding force with the target substance, and can be used more effectively as an air cleaning filter and as an air cleaning device.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.
Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.
200: Filter to collect harmful substances
210: nanofiber
220: Surface treated nanofibers
Claims (18)
Surface-treating the nanofibers so as to increase a chemical bonding force between the subject material and the nanofibers,
The surface treating step
The surface of the nanofibers is subjected to surface treatment by reactive ion etching (RIE) to induce a change in the physical and chemical properties of the nanofibers, thereby enhancing the collecting power by increasing attraction and hydrophilicity with the target material Wherein said method comprises the steps of:
Applying the surface treated nanofibers to a filter
Further comprising the steps of:
The surface treating step
Wherein the nanofiber is surface-treated to reduce the diameter of the nanofiber, thereby increasing the specific surface area and minimizing the pressure loss of the air.
The surface treating step
(COH), carboxyl group (COOH) and carboxyl groups (COOH) on the nanofibers to increase the chemical bonding force according to an increase in dipole moment.
The surface treating step
Wherein the condition of the surface treatment is adjusted so as to improve the collecting ability according to an increase in the chemical binding force between the subject material and the nanofibers.
The surface treating step
Wherein the nanofibers are subjected to a surface treatment by a thermal annealing process to induce a change in characteristics of the nanofibers.
The surface treating step
Wherein the nanofiber is subjected to a surface treatment with plasma coating to induce a change in characteristics of the nanofiber.
The surface treating step
Wherein the nanofibers are patterned to form a plurality of lines, and the surface of the self-assembled monolayer (SAM) is induced to change the characteristics of the nanofibers.
The surface treating step
Wherein the nanofiber is subjected to surface treatment with conductive nanoparticle coating or substitution to induce a change in characteristics of the nanofiber.
The nanofibers surface-treated so as to increase the chemical bonding force between the object substance and the nanofibers,
The surface treated nanofibers
Wherein the surface is treated by reactive ion etching (RIE) to change its physical and chemical properties, and the trapping power is improved by increasing attraction and hydrophilicity with the target material.
The surface treated nanofibers
Wherein the surface treatment reduces the diameter and increases the specific surface area, thereby minimizing the pressure loss of the air.
The surface treated nanofibers
Characterized in that the physical and chemical characteristics of the thermal annealing process are changed by the surface treatment of the thermal annealing process.
The surface treated nanofibers
Characterized in that the physical and chemical properties are changed by the surface treatment of the plasma coating.
The surface treated nanofibers
Characterized in that physical and chemical properties are changed by the surface treatment of a selfassembled monolayer (SAM) that is patterned to form a plurality of lines.
The surface treated nanofibers
Characterized in that physical and chemical properties are changed by the surface treatment of conductive nanoparticle coating or substitution.
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| KR1020170057365A KR101939991B1 (en) | 2017-05-08 | 2017-05-08 | High performance collecting filter for pollution material and manufacturing method thereof |
| PCT/KR2018/005075 WO2018208040A2 (en) | 2017-05-08 | 2018-05-02 | High-performance harmful substance collection filter and manufacturing method therefor |
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| KR1020170057365A KR101939991B1 (en) | 2017-05-08 | 2017-05-08 | High performance collecting filter for pollution material and manufacturing method thereof |
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| CN112717556A (en) * | 2020-11-30 | 2021-04-30 | 安徽元琛环保科技股份有限公司 | Preparation method of filtering material with functions of denitration and dioxin removal |
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| US20110020917A1 (en) * | 2007-06-22 | 2011-01-27 | Innovative Surface Technologies, Inc. | Nanofibers containing latent reactive groups |
| US20120145632A1 (en) * | 2009-07-15 | 2012-06-14 | Konraad Albert Louise Hector Dullaert | Electrospinning of polyamide nanofibers |
| US20140275692A1 (en) * | 2013-03-15 | 2014-09-18 | Shagufta Patel | Modified surface energy non-woven filter element |
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| KR100635136B1 (en) * | 2004-12-30 | 2006-10-17 | 이재근 | The Nano fiber filter using functional Nano fiber and the mathod |
| KR101006547B1 (en) * | 2008-09-29 | 2011-01-07 | 서울대학교산학협력단 | Method for fabricating nano-structure form |
| KR101583593B1 (en) * | 2012-04-20 | 2016-01-08 | (주)바이오니아 | Nano Porous Films Composed Carbon Nano Structure-Metal Composite or Carbon Nano Structure-Metal Oxide Composite and a process for preparing the same |
| US20160166959A1 (en) * | 2014-12-12 | 2016-06-16 | The Board Of Trustees Of The Leland Stanford Junior University | Air filter for high-efficiency pm2.5 capture |
| KR101734461B1 (en) * | 2015-07-31 | 2017-05-11 | 한국과학기술연구원 | Disposable absorbent article and manufacturing method thereof |
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| US20110020917A1 (en) * | 2007-06-22 | 2011-01-27 | Innovative Surface Technologies, Inc. | Nanofibers containing latent reactive groups |
| US20120145632A1 (en) * | 2009-07-15 | 2012-06-14 | Konraad Albert Louise Hector Dullaert | Electrospinning of polyamide nanofibers |
| US20140275692A1 (en) * | 2013-03-15 | 2014-09-18 | Shagufta Patel | Modified surface energy non-woven filter element |
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