WO2014168366A1 - 해수담수화용 분리막 및 이의 제조방법 - Google Patents
해수담수화용 분리막 및 이의 제조방법 Download PDFInfo
- Publication number
- WO2014168366A1 WO2014168366A1 PCT/KR2014/002722 KR2014002722W WO2014168366A1 WO 2014168366 A1 WO2014168366 A1 WO 2014168366A1 KR 2014002722 W KR2014002722 W KR 2014002722W WO 2014168366 A1 WO2014168366 A1 WO 2014168366A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carbon nanotubes
- seawater desalination
- opened
- membrane
- dopamine
- Prior art date
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 59
- 239000013535 sea water Substances 0.000 title claims abstract description 41
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000000926 separation method Methods 0.000 title claims abstract 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 133
- 239000002041 carbon nanotube Substances 0.000 claims description 117
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 117
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims description 54
- 238000000034 method Methods 0.000 claims description 49
- 238000007254 oxidation reaction Methods 0.000 claims description 39
- 230000003647 oxidation Effects 0.000 claims description 38
- 229960003638 dopamine Drugs 0.000 claims description 27
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 239000004952 Polyamide Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 229920002647 polyamide Polymers 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 13
- 150000001412 amines Chemical class 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 238000012695 Interfacial polymerization Methods 0.000 claims description 7
- 239000011261 inert gas Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 claims description 6
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims description 6
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 claims description 6
- VHRGRCVQAFMJIZ-UHFFFAOYSA-N cadaverine Chemical compound NCCCCCN VHRGRCVQAFMJIZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001479 atomic absorption spectroscopy Methods 0.000 claims description 5
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 3
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 33
- 150000003839 salts Chemical class 0.000 abstract description 23
- 230000035699 permeability Effects 0.000 abstract description 21
- 238000002360 preparation method Methods 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 17
- 238000001223 reverse osmosis Methods 0.000 description 13
- 239000006185 dispersion Substances 0.000 description 10
- 230000001965 increasing effect Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 230000029142 excretion Effects 0.000 description 4
- 229920001690 polydopamine Polymers 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- 238000002411 thermogravimetry Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 description 1
- 241000237536 Mytilus edulis Species 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- UWCPYKQBIPYOLX-UHFFFAOYSA-N benzene-1,3,5-tricarbonyl chloride Chemical compound ClC(=O)C1=CC(C(Cl)=O)=CC(C(Cl)=O)=C1 UWCPYKQBIPYOLX-UHFFFAOYSA-N 0.000 description 1
- 230000003592 biomimetic effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000009295 crossflow filtration Methods 0.000 description 1
- 229960001149 dopamine hydrochloride Drugs 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007970 homogeneous dispersion Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000020638 mussel Nutrition 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/14—Dynamic membranes
- B01D69/141—Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes
- B01D69/148—Organic/inorganic mixed matrix membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0006—Organic membrane manufacture by chemical reactions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
- B01D69/125—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
- B01D69/125—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction
- B01D69/1251—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction by interfacial polymerisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/021—Carbon
- B01D71/0212—Carbon nanotubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/56—Polyamides, e.g. polyester-amides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/58—Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
- B01D71/60—Polyamines
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
- C01B32/168—After-treatment
- C01B32/178—Opening; Filling
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/12—Specific ratios of components used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/40—Details relating to membrane preparation in-situ membrane formation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/34—Length
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/36—Diameter
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/08—Nanoparticles or nanotubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Definitions
- the present invention relates to a seawater desalination membrane and a method for producing the same, and more particularly, to a seawater desalination membrane and a method for producing the same having excellent water permeability and salt rejection rate.
- Seawater desalination membranes (reverse osmosis membranes) are efficiently used to produce household or industrial water by separating molecular materials and removing salts from seawater.
- an important factor that determines its performance is the water permeability and salt rejection rate of the seawater desalination membrane.
- the prior art document devised to solve this problem relates to a reverse osmosis membrane in which carbon nanotubes are inserted and a method for manufacturing the reverse osmosis membrane by inserting carbon nanotubes in the preparation of the reverse osmosis membrane, and a reverse osmosis membrane having improved chlorine resistance of the reverse osmosis membrane active layer
- Patent Document 1 proposes a Republic of Korea Patent Registration No. 10-1123859
- the present invention relates to a polyamide reverse osmosis membrane having improved chlorine resistance and a method for manufacturing the same, and to a polyamide reverse osmosis membrane having improved chlorine resistance by introducing carbon nanotubes into a conventional polyamide reverse osmosis membrane active layer manufacturing process through interfacial polymerization.
- Korean Patent Laid-Open Publication No. 10-2011-0098503 Patent Document 2
- Patent Document 2 Korean Patent Laid-Open Publication No. 10-2011-0098503
- Patent Document 2 Korean Patent Laid-Open Publication No. 10-2011-0098503
- Patent Document 1 Republic of Korea Patent No. 10-1123859
- Patent Document 2 Republic of Korea Patent Publication No. 10-2011-0098503
- an object of the present invention is to provide a seawater desalination membrane and a method for producing the same, which has excellent water permeability but does not reduce salt excretion rate.
- Seawater desalination membrane according to one aspect of the present invention for solving the above problems includes a carbon nanotube coated with a dopamine the end is opened.
- the average length of the carbon nanotubes is 1 ⁇ 2 ⁇ m, characterized in that the average diameter is 5 ⁇ 8nm.
- Binding energy according to the combination of carbon and oxygen is characterized in that a peak is formed at 288 ⁇ 290 eV.
- step 2) coating the carbon nanotubes whose end is opened by step 1) with dopamine;
- step 2) dispersing the carbon nanotubes obtained in step 2) in the amine solution to prepare a carbon nanotube-polyamide composite membrane by interfacial polymerization;
- step 1) oxidizes carbon nanotubes for 1 to 3 hours while injecting an inert gas at 800 to 1000 ° C.
- the inert gas is injected to cool to room temperature.
- the amount of dopamine used to coat the open end of the carbon nanotube in step 2) is characterized in that the coating using 1,000 parts by weight based on 100 parts by weight of the open carbon nanotube.
- the amine contained in the amine solution is ortho-phenylenediamine, ortho-phenylenediamine, meta-phenylenediamine, para-phenylenediamine, and piperazine. ), Ethylene diamine, cadaverine, and any one selected from the group consisting of a mixture thereof.
- the seawater desalination membrane according to the present invention and a method for preparing the same can enable the provision of a seawater desalination membrane with excellent water permeability and excellent salt rejection.
- Figure 2 is a photograph showing the results of dispersion and the results of UV spectrometer analysis without coating with dopamine.
- FIG. 3 is a photograph showing a carbon nanotube whose end is opened by treating the thermal oxidation method according to Example 1.
- FIG. 4 is a photograph showing carbon nanotubes whose ends are not opened because the thermal oxidation method is not treated by Comparative Example 1.
- FIG. 4 is a photograph showing carbon nanotubes whose ends are not opened because the thermal oxidation method is not treated by Comparative Example 1.
- thermogravimetric analysis (TGA) result of carbon nanotubes with and without thermal oxidation treatment is a thermogravimetric analysis (TGA) result of carbon nanotubes with and without thermal oxidation treatment.
- Example 10 is a process chart for preparing a carbon nanotube-polyamide composite separator according to Example 1 of the present invention.
- the present inventors made a thorough research to develop a seawater desalination membrane and a method for preparing the seawater desalination membrane having excellent water permeability and excellent salt rejection, and thus, the present inventors have found a seawater desalination membrane according to the present invention and a method for preparing the same. .
- seawater desalination membranes reverse osmosis membranes
- reverse osmosis membranes separate the water and salt of seawater so that the seawater can be used as general water. Therefore, only excellent water permeability and salt rejection of the separator ensure the excellent performance of the whole membrane.
- the support layer is bonded to the separator, this support layer is to support the separator.
- the thickness of the support layer is generally 100 ⁇ 200 ⁇ m, it is preferable that the thickness of the separator is 100 ⁇ 120 ⁇ m.
- the thermal oxidation method is a method of oxidizing by applying high temperature heat.
- the seawater desalination separator according to the present invention includes carbon nanotubes coated with dopamine.
- the dopamine is one of the biomimetic substances found in mussel extracts. Dopamine spontaneously adsorbs on a variety of materials under specific conditions and has hydroxyl group (-OH) and amine (-NH2) functional groups to improve the hydrophilicity of the adsorbed material.
- the dopamine is coated on the carbon nanotubes, the dispersibility of the carbon nanotubes in the solution used in the preparation of the seawater freshwater separator is improved.
- the seawater desalination membrane according to another aspect of the present invention comprises a carbon nanotube whose end is opened and coated with dopamine, the average length of the carbon nanotube is 1 ⁇ 2 ⁇ m, the average diameter is 5 ⁇ 8nm .
- the ends of the carbon nanotubes are preferably opened by treating the carbon nanotubes by thermal oxidation.
- the average length of the ends of the carbon nanotubes before the treatment is shortened to 1 to 2 ⁇ m after the treatment.
- the carbon nanotubes having an average diameter of 6 to 10 nm before treatment are reduced to 5 to 8 nm after the treatment.
- the length of the open end of the carbon nanotube is less than 1 ⁇ m the length is too short, it is difficult to expect the improvement of water permeation performance through the inside of the carbon nanotube in the selection layer is not preferable.
- the length of the open end of the carbon nanotube exceeds 2 ⁇ m the length is too long is not preferable because the protruding portion in the selection layer occurs.
- the performance is generally improved, but less than 5 nm is not preferable because the water transmittance is too low, if more than 8 nm salt rejection to be achieved in the present invention is It is not preferable to fall too much.
- the dopamine is coated to improve the dispersibility of the carbon nanotubes in the solution used in the preparation of the seawater freshwater separator.
- the binding energy due to the bond between carbon and oxygen forms a peak at 288 to 290 eV.
- characteristic peaks such as those after the thermal oxidation process are not observed at 288 to 290 eV.
- the selective layer for seawater desalination reverse osmosis membrane according to the present invention having such characteristics is excellent in water permeability and salt rejection rate, and thus it is possible to improve the performance of the seawater desalination reverse osmosis membrane.
- step 2) coating the carbon nanotubes whose end is opened by step 1) with dopamine;
- step 2) dispersing the carbon nanotubes obtained in step 2) in the amine solution to prepare a carbon nanotube-polyamide composite membrane by interfacial polymerization;
- the carbon nanotubes are opened at their ends by the thermal oxidation method of step 1).
- Thermal oxidation is not particularly limited as long as the carbon nanotubes are opened by oxidizing the carbon nanotubes by injecting heat.
- the carbon nanotubes are oxidized for 1 to 3 hours while injecting an inert gas at 800 to 1,000 ° C. And, it is cooled to 25 ⁇ 40 °C at room temperature, after which it is heated to 300 ⁇ 600 °C and maintained for 2 to 4 hours, it is characterized in that the inert gas is injected to cool to room temperature.
- the ends of the carbon nanotubes are opened.
- the membrane When the membrane is prepared for seawater desalination, including carbon nanotubes whose ends are opened, it enables a rapid water permeation phenomenon into the carbon nanotubes, and a membrane for seawater desalination having excellent water permeability compared to before the terminal is opened. Can be provided.
- the end of the carbon nanotubes are opened by the thermal oxidation method, the average diameter of the carbon nanotubes is reduced to 5 to 8 nm, thereby reducing the effect of reducing the salt excretion rate in the active layer.
- the average length of the carbon nanotubes becomes 1 to 2 ⁇ m, and there is no protruding portion, and at the same time, the carbon nanotubes are completely enclosed in the separator to reduce the water permeability. This phenomenon is preferable because it can prevent the phenomenon.
- the carbon nanotubes By coating the carbon nanotubes with dopamine in the step 2) it is possible to improve the dispersibility of the carbon nanotubes in the solution used for preparing the membrane. It is common to administer a surfactant to improve the dispersibility of the carbon nanotubes in the solution used in the manufacture of the separator, but despite the addition of the surfactant, the dispersion of the carbon nanotubes is poor and agglomeration occurs. Was present. However, by coating the carbon nanotubes with dopamine, the dispersibility of the carbon nanotubes is remarkably improved.
- the amount of dopamine used to coat the carbon nanotubes in the step 2) is characterized in that the coating by using 1,000 parts by weight based on 100 parts by weight of the carbon nanotubes the end is opened.
- a carbon nanotube-polyamide composite separator is formed by interfacial polymerization.
- the carbon nanotubes are coated with dopamine, so that the dispersibility is excellent in the amine solution, and the aggregation phenomenon is significantly reduced.
- the amine contained in the amine solution is ortho-phenylenediamine, ortho-phenylenediamine, meta-phenylenediamine, para-phenylenediamine, and piperazine. ), Ethylene diamine, cadaverine, and mixtures thereof.
- the thermal oxidation process was the first step through a thermal annealing process to remove amorphous carbon and impurities.
- the carbon nanotubes were placed in a furnace, and the reaction was performed at 900 ° C. for 2 hours in an argon atmosphere.
- a thermal oxidation reaction process was performed to open the ends of the carbon nanotubes.
- Fill the furnace with high-purity air heat the carbon nanotubes to 400 °C at 10 °C / min in air condition, maintain 3 hours at isothermal temperature at 400 °C, and raise the furnace temperature to 500 °C at 10 °C / min.
- inert gas argon
- a polydopamine coating process was introduced to increase the dispersing performance of the end-opened carbon nanotubes.
- Dopamine solution 2,000 ppm Dopamine hydrochloride
- a precursor of polydopamine was prepared under specific conditions (using a 1 M NaOH solution in 15 mM Trizma solution to adjust the pH to pH 8.5 or higher), and then using a known stirring coating method.
- the reaction proceeded with the nanotubes.
- the coating process was performed while reacting with an ultrasonic homogeneous system for uniform coating, and the polydopamine was purified by centrifugation to separate the carbon nanotubes uniformly coated. 9 is to confirm the structure of the poly dopamine-coated carbon nanotubes through TEM analysis.
- the dopamine-coated carbon nanotubes according to Preparation Example 2 was dispersed in a water system with a surfactant and stirred with meta-phenylenediamine (MPD) to obtain an MPD solution, TMC After dissolving (Trimesoyl chloride) in a Dodecane solvent to obtain an organic solution, a carbon nanotube-polyamide composite membrane having open ends was prepared by interfacial polymerization. In addition, UV-vis spectroscopy was performed while increasing the concentration of carbon nanotubes to confirm the dispersion performance.
- MPD meta-phenylenediamine
- a carbon nanotube-polyamide composite separator was prepared in the same manner as in Example 1 except that the processes of Preparation Example 1 and Preparation Example 2 were not performed.
- a carbon nanotube-polyamide composite separator was prepared in the same manner as in Example 1 except that the procedure of Preparation Example 1 was not performed.
- a carbon nanotube-polyamide composite separator was prepared in the same manner as in Example 1 except that the process of Preparation Example 2 was not performed.
- FIG. 3 is a thermal oxidation method according to Preparation Example 1
- Figure 4 is a TEM photograph of the end of the carbon nanotubes when the thermal oxidation method is not performed.
- the average length of the carbon nanotubes is 3 to 5 ⁇ m, and when the terminal is opened by the thermal oxidation method, the average length is 1 to 2 ⁇ m.
- the average length of the carbon nanotubes was also shortened.
- the average diameter is 6 to 10 nm, and when the terminal is opened by the thermal oxidation method, the average diameter is 5 to 8 nm. It was confirmed that the average diameter of the carbon nanotubes is also reduced due to the terminal opening according to the oxidation method.
- FIG. 5 is a case in which the end is not opened and the dopamine is coated with carbon nanotubes according to Comparative Example 1
- FIG. 6 is the dopamine coated in Comparative Example 3 If not, but the end is used to open the carbon nanotubes.
- the permeability increased when the ends of the carbon nanotubes were unopened than when the terminals were not opened.
- the weight of the carbon nanotubes decreased as the temperature increased to a high temperature.
- the binding energy (Binding Energy) according to the binding of carbon and oxygen is 288 ⁇ 290 eV It was confirmed that the peak is formed at. However, in the absence of thermal oxidation, characteristic peaks were not observed at 288 ⁇ 290 eV.
- Table 2 shows the results obtained by measuring the water permeability and salt rejection of the membrane as the content of carbon nanotubes is increased using the separator prepared in Example 1.
- Table 3 below is a result of measuring the water permeability and salt rejection of the separator prepared from Comparative Example 3.
- Example 1 in the case of Example 1 according to the present invention, as can be seen in Table 2, it was confirmed that the water permeability and the salt rejection rate were excellently improved or maintained even though the content of carbon nanotubes was increased. On the contrary, in Table 3, even in the case of increasing the content of carbon nanotubes in Comparative Example 3, the water permeability did not increase, and the salt excretion rate also decreased. Through this, it was confirmed that the coating of dopamine on the end-opened carbon nanotubes contributes to the improvement of water transmittance and salt rejection rate.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Polyamides (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
Claims (7)
- 말단이 개봉되고 도파민으로 코팅된 탄소나노튜브를 포함하는 해수담수화용 분리막.
- 제 1항에 있어서,상기 탄소나노튜브의 평균 길이는 1~2㎛이고, 평균 직경은 5~8nm인 것을 특징으로 하는 해수담수화용 분리막.
- 제 1항에 있어서,원자흡광분석법에 의해 상기 말단이 개봉된 탄소나노튜브를 분석한 경우,탄소와 산소의 결합에 따른 결합에너지(Binding Energy)는 288~290 eV 에서 피크가 형성되는 것을 특징으로 하는 해수담수화용 분리막.
- 1) 열산화법을 통해 말단이 개봉된 탄소나노튜브를 얻는 단계;2) 상기 1)단계에 의해 말단이 개봉된 탄소나노튜브를 도파민으로 코팅하는 단계; 및3) 상기 2)단계에서 얻어진 탄소나노튜브를 아민 용액에 분산시킨 후 계면중합법에 의하여 탄소나노튜브-폴리아미드 복합 분리막을 제조하는 단계;를 포함하는 해수담수화용 분리막의 제조방법.
- 제 4항에 있어서,상기 1)단계의 열산화법은 800~1000℃에서 비활성기체를 주입하면서 1~3시간 동안 탄소나노튜브를 산화시킨 후,이를 상온에서 25~40℃까지 냉각하고,그 후 이를 300~600℃로 승온하여 2~4시간 동안 유지한 다음,비활성기체를 주입하여 상온까지 냉각시키는 것을 특징으로 하는 해수담수화용 분리막의 제조방법.
- 제 4항에 있어서,상기 2)단계에서 말단이 개봉된 탄소나노튜브를 코팅하기 위하여 사용되는 도파민의 양은 상기 말단이 개봉된 탄소나노튜브 100중량부에 대하여 1,000중량부를 사용하여 코팅하는 것을 특징으로 하는 해수담수화용 분리막의 제조방법.
- 제 4항에 있어서,상기 아민 용액에 포함되는 아민은 오르소-페닐렌다이아민(ortho-phenylenediamine), 메타-페닐렌다이아민(meta-phenylenediamine), 파라-페닐렌다이아민(para-phenylenediamine), 피페라진(piperazine), 에틸렌다이아민(ethylene diamine), 카다버린(cadaverine), 및 이들의 혼합물로 이루어지는 군으로부터 선택된 어느 하나인 것을 특징으로 하는 해수담수화용 분리막의 제조방법.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201480026035.0A CN105209160A (zh) | 2013-04-08 | 2014-03-31 | 用于海水淡化的分离膜及其制造方法 |
US14/783,299 US20160051940A1 (en) | 2013-04-08 | 2014-03-31 | Separation membrane for seawater desalination and method for producing same |
JP2016506230A JP6298149B2 (ja) | 2013-04-08 | 2014-03-31 | 海水淡水化用分離膜及びその製造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020130038195A KR101498041B1 (ko) | 2013-04-08 | 2013-04-08 | 해수담수화용 분리막 및 이의 제조방법 |
KR10-2013-0038195 | 2013-04-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014168366A1 true WO2014168366A1 (ko) | 2014-10-16 |
Family
ID=51689731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2014/002722 WO2014168366A1 (ko) | 2013-04-08 | 2014-03-31 | 해수담수화용 분리막 및 이의 제조방법 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20160051940A1 (ko) |
JP (1) | JP6298149B2 (ko) |
KR (1) | KR101498041B1 (ko) |
CN (1) | CN105209160A (ko) |
WO (1) | WO2014168366A1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2016158992A1 (ja) * | 2015-03-31 | 2018-01-25 | 国立大学法人信州大学 | 逆浸透複合膜及び逆浸透複合膜の製造方法 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6260997B2 (ja) * | 2014-01-10 | 2018-01-17 | 国立研究開発法人産業技術総合研究所 | ナノカーボン高分子複合体の製造方法及び該方法で製造されたナノカーボン高分子複合体 |
EP4234023A3 (en) * | 2016-04-07 | 2023-11-08 | Molecular Rebar Design LLC | Discrete carbon nanotubes with targeted oxidation levels and formulations thereof |
JP6733959B2 (ja) * | 2016-09-29 | 2020-08-05 | 国立大学法人信州大学 | 逆浸透複合膜 |
KR101958262B1 (ko) * | 2016-12-26 | 2019-07-02 | 한국수자원공사 | 탄소나노튜브가 함유된 지지체를 포함하는 역삼투 분리막 및 이의 제조방법 |
CN106823831A (zh) * | 2017-03-03 | 2017-06-13 | 哈尔滨工业大学 | 一种有机催化膜的制备方法及应用 |
KR101998628B1 (ko) * | 2017-09-19 | 2019-07-10 | 키넷 주식회사 | 중공사막 및 이를 이용한 산소 농축을 위한 분리막 시스템 |
KR101998961B1 (ko) * | 2017-09-22 | 2019-07-10 | 현대건설주식회사 | 하이브리드 해수담수화 장치 및 방법 |
KR102389736B1 (ko) | 2020-03-27 | 2022-04-22 | 서울대학교산학협력단 | 탄소나노튜브를 포함하는 나노복합막 및 그 제조방법 |
CN111573780B (zh) * | 2020-04-09 | 2022-07-01 | 中国科学院宁波材料技术与工程研究所 | 光热膜蒸馏器及其制备方法和应用,以及水处理设备 |
CN113651315A (zh) | 2021-08-18 | 2021-11-16 | 成都富安纳新材料科技有限公司 | 易于分散的活性纳米碳粉末及其制备方法 |
CN113694726A (zh) * | 2021-09-24 | 2021-11-26 | 中国农业大学 | 一种去除模拟放射性废水中核素钴的纳滤膜的制备方法和应用 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100113823A (ko) * | 2009-04-14 | 2010-10-22 | 삼성전자주식회사 | 분산성 탄소나노튜브, 분산성 탄소나노튜브-고분자 복합체 및 이의 제조 방법 |
KR20110068969A (ko) * | 2008-06-30 | 2011-06-22 | 나노아시스 테크놀로지즈 인코오포레이티드 | 선택적 투과성을 위한 내장 나노튜브를 갖는 막 |
KR20120077997A (ko) * | 2010-12-31 | 2012-07-10 | 주식회사 효성 | 폴리아마이드계 역삼투 분리막의 제조방법 및 그에 의해 제조된 폴리아마이드계 역삼투 분리막 |
KR101250310B1 (ko) * | 2012-08-30 | 2013-04-03 | 한국수자원공사 | 탄소나노튜브가 함유된 폴리술폰 지지체를 이용한 폴리아미드 역삼투막 및 그 제조방법 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100250310B1 (ko) * | 1995-12-22 | 2000-04-01 | 정몽규 | 자동변속기 차량용 주차 잠금장치 |
US7931838B2 (en) * | 2006-08-31 | 2011-04-26 | Virginia Tech Intellectual Properties, Inc. | Method for making oriented single-walled carbon nanotube/polymer nano-composite membranes |
WO2012135065A2 (en) * | 2011-03-25 | 2012-10-04 | Porifera, Inc. | Membranes having aligned 1-d nanoparticles in a matrix layer for improved fluid separation |
-
2013
- 2013-04-08 KR KR1020130038195A patent/KR101498041B1/ko active IP Right Grant
-
2014
- 2014-03-31 WO PCT/KR2014/002722 patent/WO2014168366A1/ko active Application Filing
- 2014-03-31 CN CN201480026035.0A patent/CN105209160A/zh active Pending
- 2014-03-31 US US14/783,299 patent/US20160051940A1/en not_active Abandoned
- 2014-03-31 JP JP2016506230A patent/JP6298149B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20110068969A (ko) * | 2008-06-30 | 2011-06-22 | 나노아시스 테크놀로지즈 인코오포레이티드 | 선택적 투과성을 위한 내장 나노튜브를 갖는 막 |
KR20100113823A (ko) * | 2009-04-14 | 2010-10-22 | 삼성전자주식회사 | 분산성 탄소나노튜브, 분산성 탄소나노튜브-고분자 복합체 및 이의 제조 방법 |
KR20120077997A (ko) * | 2010-12-31 | 2012-07-10 | 주식회사 효성 | 폴리아마이드계 역삼투 분리막의 제조방법 및 그에 의해 제조된 폴리아마이드계 역삼투 분리막 |
KR101250310B1 (ko) * | 2012-08-30 | 2013-04-03 | 한국수자원공사 | 탄소나노튜브가 함유된 폴리술폰 지지체를 이용한 폴리아미드 역삼투막 및 그 제조방법 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2016158992A1 (ja) * | 2015-03-31 | 2018-01-25 | 国立大学法人信州大学 | 逆浸透複合膜及び逆浸透複合膜の製造方法 |
US10376847B2 (en) | 2015-03-31 | 2019-08-13 | Shinshu University | Reverse osmosis composite membrane and method for manufacturing reverse osmosis composite membrane |
US11000811B2 (en) | 2015-03-31 | 2021-05-11 | Shinshu University | Reverse osmosis composite membrane and method for manufacturing reverse osmosis composite membrane |
Also Published As
Publication number | Publication date |
---|---|
CN105209160A (zh) | 2015-12-30 |
US20160051940A1 (en) | 2016-02-25 |
JP2016517795A (ja) | 2016-06-20 |
JP6298149B2 (ja) | 2018-03-20 |
KR20140121958A (ko) | 2014-10-17 |
KR101498041B1 (ko) | 2015-03-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014168366A1 (ko) | 해수담수화용 분리막 및 이의 제조방법 | |
WO2015182975A1 (en) | Membranes having antibiotic and hydrophilic properties and preparation method thereof | |
WO2015163595A1 (ko) | 층간 자기조립을 이용한 그래핀 기반 나노탄소 섬유 제조 방법 | |
WO2015050387A1 (ko) | 표면개질 분리막 및 분리막의 표면개질 방법 | |
WO2016117856A1 (ko) | 기공을 갖는 입자를 이용한 폴리이미드 필름의 제조방법 및 저유전율의 폴리이미드 필름 | |
WO2015133848A1 (ko) | 기체분리용 그래핀 옥사이드 나노복합막, 환원된 그래핀 옥사이드 나노복합막 및 그 제조방법 | |
WO2015133849A1 (ko) | 기체 차단 특성이 향상된 그래핀 옥사이드 나노복합막 및 그 제조방법 | |
WO2013183969A1 (ko) | 표면 처리된 제올라이트를 포함하는 고투과 유량 역삼투막 및 이를 제조하는 방법 | |
WO2015137678A1 (ko) | 산화그래핀 코팅층을 포함하는 복합막, 이를 포함하는 다공성 고분자 지지체 및 이의 제조방법 | |
WO2017146457A2 (ko) | 열전환 폴리(벤즈옥사졸-이미드) 공중합체 기반의 초박형 복합막 및 그 제조방법 | |
WO2019212210A1 (ko) | 표면 이온 교환 고분자 전해질이 제거된 세공충진 이온 교환 고분자 전해질 복합막 및 이의 제조방법 | |
WO2019209010A1 (ko) | 방향족 탄화수소를 이용한 우수한 용질 제거 성능을 가진 분리막 제조 기술 | |
KR101491533B1 (ko) | 폴리도파민을 이용한 탄소 코팅된 금속입자의 제조방법 및 이를 통해 제조된 탄소 코팅된 금속입자 | |
WO2012074222A9 (ko) | 셀룰로오스계 수지를 이용한 수처리용 중공사막의 제조방법 | |
WO2016072726A2 (ko) | 항바이러스 여재용 양전하 코팅제, 항바이러스 여재 및 이의 제조방법 | |
WO2018194432A2 (ko) | 다공성 기재 층 및 cnt/키토산 나노 하이브리드 코팅층을 포함하는 멤브레인 및 이를 포함하는 정전식 집진 시스템 | |
WO2019117663A1 (ko) | 그래핀 복합 섬유 및 그 제조장치, 및 그 제조방법 | |
WO2016089055A1 (ko) | 나노 분리막 구조물 및 이의 제조 방법 | |
WO2020009421A1 (ko) | 수산화 반응을 이용한 친환경적으로 산화 흑연 및 산화 그래핀을 제조하는 방법 | |
WO2018004092A1 (ko) | 나노 구조체 네트워크 및 그 제조 방법 | |
WO2014115920A1 (ko) | 배향된 석출물을 가지는 금속복합재료 및 이의 제조방법 | |
WO2018074767A2 (ko) | 역삼투막 보호층 형성용 조성물, 이를 이용한 역삼투막 제조방법, 역삼투막 및 수처리 모듈 | |
WO2016114501A2 (ko) | 대면적 단일 도메인으로 배열된 유기분자의 수직원기둥 또는 라멜라 구조체의 제조방법 | |
WO2018155753A1 (ko) | 재생 가능한 수처리 분리막 및 이의 제조방법 | |
WO2017052256A1 (ko) | 수처리 분리막 및 이의 제조방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14782096 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016506230 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14783299 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14782096 Country of ref document: EP Kind code of ref document: A1 |