CN116099388A - Preparation method and application of sub-nano porous PET film - Google Patents
Preparation method and application of sub-nano porous PET film Download PDFInfo
- Publication number
- CN116099388A CN116099388A CN202211608024.6A CN202211608024A CN116099388A CN 116099388 A CN116099388 A CN 116099388A CN 202211608024 A CN202211608024 A CN 202211608024A CN 116099388 A CN116099388 A CN 116099388A
- Authority
- CN
- China
- Prior art keywords
- sub
- pet film
- nano
- nano porous
- ions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920002799 BoPET Polymers 0.000 title claims abstract description 136
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 150000002500 ions Chemical class 0.000 claims abstract description 92
- 239000011148 porous material Substances 0.000 claims abstract description 48
- 238000000926 separation method Methods 0.000 claims abstract description 38
- 238000002791 soaking Methods 0.000 claims abstract description 36
- 239000003960 organic solvent Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 24
- 239000012528 membrane Substances 0.000 claims description 24
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 16
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 10
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N hexane Substances CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 239000000243 solution Substances 0.000 description 14
- 229910021645 metal ion Inorganic materials 0.000 description 13
- 230000001678 irradiating effect Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 description 7
- 238000009776 industrial production Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 210000004492 nuclear pore Anatomy 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000866 electrolytic etching Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000001612 separation test Methods 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940021013 electrolyte solution Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007785 strong electrolyte Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- 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
- B01D71/48—Polyesters
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/34—Use of radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/46—Impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/02—Details relating to pores or porosity of the membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/02—Details relating to pores or porosity of the membranes
- B01D2325/021—Pore shapes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/04—Characteristic thickness
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a preparation method and application of a sub-nano porous PET film, wherein the preparation method comprises the following steps: under the vacuum condition, the PET film is subjected to vertical uniform irradiation by utilizing a heavy ion accelerator, and the number of heavy ions of the irradiated PET film is 10 8 ～10 12 ions/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the And (3) soaking the irradiated PET film by using an organic solvent to form a plurality of sub-nano pore canals which are parallel to each other and perpendicular to the surface of the film, taking out and cleaning the organic solvent residue after soaking, and naturally airing to obtain the sub-nano porous PET film, wherein the sub-nano pore canals are through holes, and the diameters of the sub-nano pore canals are sub-nano grade. The preparation method of the sub-nano porous PET film is simple and practical, is beneficial to reducing the production cost and carrying out industrialized production, and the sub-nano pore channels are uniformly and vertically distributed, so that the prepared sub-nano porous PET film has good ion separation performance, stable performance and wide application prospect.
Description
Technical Field
The invention relates to the field of separation membranes, in particular to a preparation method and application of a sub-nano porous PET membrane.
Background
Along with the continuous improvement of the industrialization level in China, the sewage quantity generated in industrial production is increased year by year while the economy is increased at a high speed, and the development of the sewage treatment technology has important significance for the industrial development in China. Membrane separation technology is a common technology in wastewater treatment. Compared with other technologies, the membrane separation has the characteristics of being capable of being carried out at normal temperature, good in selectivity, capable of being recycled for multiple times, free of phase change in the process and the like. The membrane separation technology has wide application in the fields of sea water desalination, sewage purification, gas separation, medicine separation and purification and the like. Future membrane separation technologies will become the dominant new generation of separation technologies. The membrane separation technology at the present stage has the following problems: the commercial separation membrane production process is easy to cause environmental pollution, and the production process is complex.
The nuclear pore membrane is a porous membrane material obtained by irradiating a polymer film with charged ions to break chemical bonds in the polymer and then performing chemical etching. The holes on the conventionally manufactured nuclear pore membrane are random holes. The effective aperture of the nuclear pore membrane reaches sub-nanometer at present, and can be realized by an electroetching method. However, due to the defects of nonlinear photochemical reaction rate, complicated electroetching operation equipment, large energy consumption, incapability of large-area continuous production and the like, the sub-nanometer nuclear pore membrane with stable separation performance, low cost and simple preparation process is difficult to obtain. Therefore, the research on the sub-nanometer polymer porous membrane which has the advantages of simple and convenient preparation process, environmental protection, low production and processing cost and better ion separation performance has very important significance.
Disclosure of Invention
The invention provides a preparation method and application of a sub-nano porous PET film, aiming at solving the problems of complex manufacturing process and unstable performance of a separation film.
The preparation method of the sub-nano porous PET film comprises the following steps:
under the vacuum condition, the PET film is subjected to vertical uniform irradiation by utilizing a heavy ion accelerator, and the number of heavy ions of the irradiated PET film is 10 8 ～10 12 ions/cm 2 ；
And (3) soaking the irradiated PET film by using an organic solvent to form a plurality of sub-nano pore canals which are parallel to each other and perpendicular to the surface of the film, taking out and cleaning the organic solvent residue after soaking, and naturally airing to obtain the sub-nano porous PET film, wherein the sub-nano pore canals are through holes, and the diameters of the sub-nano pore canals are sub-nano grade. The preparation process of the sub-nano porous PET film is simple, and the obtained sub-nano porous PET film has stable performance and good separation performance.
Optionally, the heavy ions are one or more elements with atomic number greater than or equal to 36. The prepared sub-nano porous PET film has stable performance and good separation performance.
Optionally, the energy of the heavy ions is 1-30 MeV/u. The prepared sub-nano porous PET film has stable performance and good separation performance.
Alternatively, the irradiation has a density of 10 8 ～10 12 ions/cm 2 . The prepared sub-nano porous PET film has stable performance and good separation performance.
Optionally, the organic solvent includes at least one of methanol, N-hexane, isopropanol, N-dimethylformamide, dimethyl sulfoxide, and tetrahydrofuran. The prepared sub-nano porous PET film has stable performance and good separation performance.
Optionally, the PET film has a thickness of 1 to 50 μm. The prepared sub-nano porous PET film has stable performance and good separation performance.
Optionally, the density of the sub-nanometer pore canal is 10 8 ～10 12 Individual/cm 2 . The prepared sub-nano porous PET film has stable performance and good separation performance.
Optionally, the soaking time is 1-24 h. The prepared sub-nano porous PET film has stable performance and good separation performance.
Optionally, the temperature of the organic solvent for soaking the membrane is 18-60 ℃. The prepared sub-nano porous PET film has stable performance and good separation performance.
An application of a sub-nano porous PET membrane comprises the sub-nano porous PET membrane, wherein the sub-nano porous PET membrane is used for ion separation.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a preparation method of a sub-nano porous PET film, which comprises the steps of irradiating the PET film by a heavy ion accelerator, soaking the PET film by an organic solvent, and the preparation method is simple and practical, is beneficial to reducing the production cost and carrying out industrial production, ensures that sub-nano pore channels are uniformly and vertically distributed, and the prepared sub-nano porous PET film has good ion separation performance, stable performance and wide application prospect.
The invention provides an application of a sub-nano porous PET film, which has the advantages of low cost, ion separation function, stable performance and good ion separation effect; when the solution contains the mono-valent metal ion and the divalent metal ion, the sub-nano porous PET film can separate the monovalent ion and intercept the divalent ion simply and with low energy consumption.
Drawings
FIG. 1 is a line graph showing the results of ion separation tests of a sub-nano porous PET film prepared in example 1 of the present invention;
FIG. 2 is a bar graph showing the results of ion separation test of the sub-nano porous PET film prepared in example 2 of the present invention.
Detailed Description
In order to describe the technical solution of the present invention in detail, the technical solution of the embodiments of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
Example 1:
the embodiment provides a preparation method of a sub-nano porous PET film, which comprises the following steps:
s1: under the vacuum condition, the vertical and uniform irradiation is carried out on the PET film by utilizing a heavy ion accelerator, the intensity and the irradiation time of the accelerator beam are regulated according to actual needs, and the number of heavy ions for irradiating the PET film is 10 8 ～10 12 ions/cm 2 。
The PET film used has a thickness of 1 to 50. Mu.m. The heavy ions are one or more of elements with atomic numbers greater than or equal to 36. The energy of heavy ions is 1-30 MeV/u, and the irradiation density is 10 8 ～10 12 ions/cm 2 。
S2: and (3) soaking the irradiated PET film by using an organic solvent to form a plurality of sub-nano pore canals which are parallel to each other and perpendicular to the surface of the film, taking out and cleaning the soaked PET film, and naturally airing the PET film to obtain the sub-nano porous PET film, wherein the sub-nano pore canals are through holes, and the diameters of the sub-nano pore canals are in the sub-nano level.
The organic solvent comprises at least one of methanol, N-hexane, isopropanol, N-dimethylformamide, dimethyl sulfoxide and tetrahydrofuran. The density of the sub-nanometer pore canal is 10 8 ～10 12 Individual/cm 2 The sub-nanometer pore canal is evenly distributed on the sub-nanometer porous PET film. Compared with the traditional separation membrane, the sub-nano porous PET membrane has one important characteristic that the sub-nano pore canal is a straight through hole.
In the soaking process, the damaged area of the PET film irradiated by heavy ions is partially dissolved and discharged, and sub-nano pore channels which are identical in height, parallel to each other and perpendicular to the surface of the PET film are finally formed on the PET film, wherein the sub-nano pore channels are through holes, the soaking time is 1-24 h, and the temperature is 18-60 ℃ when the film is soaked by an organic solvent.
In this embodiment, lanzhou heavy ion acceleration is utilizedProvided by the device 129 Vertical uniform irradiation of 12 μm thick PET film with Xe ions in a vacuum atmosphere, wherein heavy ions 129 The energy of Xe was 19.5MeV/u and the irradiation dose was 4.25X10 10 ions/cm 2 After the irradiation is finished, the PET film is put into methanol for soaking, the methanol temperature is 21 ℃ and the soaking time is 24 hours, the PET film is taken out after the soaking is finished, washed and naturally dried, and the sub-nano porous PET film is obtained, and the density of sub-nano pore channels is 4.25 multiplied by 10 10 Individual/cm 2 。
The embodiment provides a preparation method of a sub-nano porous PET film, which comprises the steps of irradiating the PET film through a heavy ion accelerator, soaking the PET film in an organic solvent, and the preparation method is simple and practical, is beneficial to reducing the production cost and carrying out industrial production, ensures that sub-nano pore channels are uniformly and vertically distributed, and the prepared sub-nano porous PET film has good ion separation performance, stable performance and wide application prospect.
Example 2:
the embodiment provides a preparation method of a sub-nano porous PET film, which comprises the following steps:
s1: under the vacuum condition, the vertical and uniform irradiation is carried out on the PET film by utilizing a heavy ion accelerator, the intensity and the irradiation time of the accelerator beam are regulated according to actual needs, and the number of heavy ions for irradiating the PET film is 10 8 ～10 12 ions/cm 2 。
The PET film used has a thickness of 1 to 50. Mu.m. The heavy ions are one or more of elements with atomic numbers greater than or equal to 36. The energy of heavy ions is 30MeV/u, and the irradiation density is 10 8 ～10 12 ions/cm 2 。
S2: and (3) soaking the irradiated PET film by using an organic solvent to form a plurality of sub-nano pore canals which are parallel to each other and perpendicular to the surface of the film, taking out and cleaning the soaked PET film, and naturally airing the PET film to obtain the sub-nano porous PET film, wherein the sub-nano pore canals are through holes, and the diameters of the sub-nano pore canals are in the sub-nano level.
The organic solvent comprises at least one of methanol, N-hexane, isopropanol, N-dimethylformamide, dimethyl sulfoxide and tetrahydrofuranOne less. The density of the sub-nanometer pore canal is 10 8 ～10 12 Individual/cm 2 The sub-nanometer pore canal is evenly distributed on the sub-nanometer porous PET film.
In the soaking process, the damaged area of the PET film irradiated by heavy ions is partially dissolved and discharged, and sub-nano pore channels which are identical in height, parallel to each other and perpendicular to the surface of the PET film are finally formed on the PET film, wherein the sub-nano pore channels are through holes, the soaking time is 1-24 h, and the temperature is 18-60 ℃ when the film is soaked by an organic solvent.
In this embodiment, provided by a Lanzhou heavy ion accelerator 129 Vertical uniform irradiation of 12 μm thick PET film with Xe ions in a vacuum atmosphere, wherein heavy ions 129 The energy of Xe was 19.5MeV/u and the irradiation dose was 1.7X10 10 ions/cm 2 After the irradiation is finished, the PET film is put into dimethyl sulfoxide for soaking, the temperature of the dimethyl sulfoxide is 21 ℃ during soaking, the soaking time is 24 hours, and after the soaking is finished, the PET film is taken out for cleaning and naturally airing, so as to obtain the sub-nano porous PET film, wherein the density of sub-nano pore channels is 1.7x10 10 Individual/cm 2 。
The embodiment provides a preparation method of a sub-nano porous PET film, which comprises the steps of irradiating the PET film through a heavy ion accelerator, soaking the PET film in an organic solvent, and the preparation method is simple and practical, is beneficial to reducing the production cost and carrying out industrial production, ensures that sub-nano pore channels are uniformly and vertically distributed, and the prepared sub-nano porous PET film has good ion separation performance, stable performance and wide application prospect.
Example 3:
the embodiment provides a preparation method of a sub-nano porous PET film, which comprises the following steps:
s1: under the vacuum condition, the vertical and uniform irradiation is carried out on the PET film by utilizing a heavy ion accelerator, the intensity and the irradiation time of the accelerator beam are regulated according to actual needs, and the number of heavy ions for irradiating the PET film is 10 8 ions/cm 2 。
The PET film used had a thickness of 1. Mu.m. The heavy ions are one or more of elements with atomic numbers greater than or equal to 36. The energy of the heavy ion is 1MeV +.u, the irradiation density is 10 8 ions/cm 2 。
S2: and (3) soaking the irradiated PET film by using an organic solvent to form a plurality of sub-nano pore canals which are parallel to each other and perpendicular to the surface of the film, taking out and cleaning the soaked PET film, and naturally airing the PET film to obtain the sub-nano porous PET film, wherein the sub-nano pore canals are through holes, and the diameters of the sub-nano pore canals are in the sub-nano level.
The organic solvent comprises at least one of methanol, N-hexane, isopropanol, N-dimethylformamide, dimethyl sulfoxide and tetrahydrofuran. The density of the sub-nanometer pore canal is 10 8 ～10 12 Individual/cm 2 The sub-nanometer pore canal is evenly distributed on the sub-nanometer porous PET film.
In the soaking process, the damaged area of the PET film irradiated by heavy ions is partially dissolved and discharged, and sub-nano pore channels which are identical in height, parallel to each other and perpendicular to the surface of the PET film are finally formed on the PET film, wherein the sub-nano pore channels are through holes, the soaking time is 1h, and the temperature is 18 ℃ when the organic solvent is used for soaking the film.
The embodiment provides a preparation method of a sub-nano porous PET film, which comprises the steps of irradiating the PET film through a heavy ion accelerator, soaking the PET film in an organic solvent, and the preparation method is simple and practical, is beneficial to reducing the production cost and carrying out industrial production, ensures that sub-nano pore channels are uniformly and vertically distributed, and the prepared sub-nano porous PET film has good ion separation performance, stable performance and wide application prospect.
Example 4:
the embodiment provides a preparation method of a sub-nano porous PET film, which comprises the following steps:
s1: under the vacuum condition, the vertical and uniform irradiation is carried out on the PET film by utilizing a heavy ion accelerator, the intensity and the irradiation time of the accelerator beam are regulated according to actual needs, and the number of heavy ions for irradiating the PET film is 10 12 ions/cm 2 。
The PET film used had a thickness of 50. Mu.m. The heavy ions are one or more of elements with atomic numbers greater than or equal to 36. The energy of the heavy ion is 30MeV/u, and the irradiation density is 10 12 ions/cm 2 。
S2: and (3) soaking the irradiated PET film by using an organic solvent to form a plurality of sub-nano pore canals which are parallel to each other and perpendicular to the surface of the film, taking out and cleaning the soaked PET film, and naturally airing the PET film to obtain the sub-nano porous PET film, wherein the sub-nano pore canals are through holes, and the diameters of the sub-nano pore canals are in the sub-nano level.
The organic solvent comprises at least one of methanol, N-hexane, isopropanol, N-dimethylformamide, dimethyl sulfoxide and tetrahydrofuran. The density of the sub-nanometer pore canal is 10 8 ～10 12 Individual/cm 2 The sub-nanometer pore canal is evenly distributed on the sub-nanometer porous PET film.
In the soaking process, the damaged area of the PET film irradiated by heavy ions is partially dissolved and discharged, and sub-nano pore channels which are identical in height, parallel to each other and perpendicular to the surface of the PET film are finally formed on the PET film, wherein the sub-nano pore channels are through holes, the soaking time is 24 hours, and the temperature is 60 ℃ when the organic solvent is used for soaking the film.
The embodiment provides a preparation method of a sub-nano porous PET film, which comprises the steps of irradiating the PET film through a heavy ion accelerator, soaking the PET film in an organic solvent, and the preparation method is simple and practical, is beneficial to reducing the production cost and carrying out industrial production, ensures that sub-nano pore channels are uniformly and vertically distributed, and the prepared sub-nano porous PET film has good ion separation performance, stable performance and wide application prospect.
Example 5:
the embodiment provides an application of a sub-nano porous PET film, which comprises the sub-nano porous PET film prepared in the embodiment 1-2, wherein the sub-nano porous PET film is used for ion separation.
The sub-nano porous PET film prepared in the above example 1 was sandwiched between H-type cells, and KCl, naCl, liCl, mgCl in 0.1mol/L was sequentially added 2 And CaCl 2 Pouring the solution into two sides of the electrolytic tank to enable the liquid levels at the two sides to be level, applying scanning voltage of-5V to the solution at the two sides of the electrolytic tank by using an Ag/AgCl electrode, and comparing the current under the same voltage to reflect the selection of ions by the sub-nano porous PET filmSex. As shown in fig. 1, the conduction current of the sub-nano porous PET film on monovalent metal ions is greater than that of divalent metal ions under the same voltage, which indicates that the sub-nano porous PET film can separate the monovalent ions from the divalent metal ions.
The sub-nano porous PET film prepared in the above example 2 was sandwiched between H-type cells, and KCl, naCl, mgCl in 1mol/L was sequentially added 2 、CaCl 2 Pouring the solution into one side of the electrolytic tank, pouring deionized water into the other side of the electrolytic tank, enabling the liquid levels on the two sides to be level, applying 10V voltage to the two sides of the electrolytic tank by using an Ag/AgCl electrode to drive cations to directionally move towards one side of the deionized water, enabling a positive electrode to be on one side of the solution and a negative electrode to be on one side of the deionized water, stopping applying the voltage after one hour, and measuring the conductivity of one side where the deionized water is placed by using a conductivity meter.
In strong electrolyte solutions, the molar concentration of ions is positively correlated with the conductivity of the solution, with greater conductivity indicating more ions permeate through the membrane and higher permeation rates. From the conductivity of the solution and the concentration of ions in the known solution, the selectivity of the sub-nano porous PET film to different ions can be tested. As shown in fig. 2, the permeation rate of the sub-nano porous PET film to monovalent metal ions is far greater than that of divalent metal ions, which indicates that the sub-nano porous PET film can separate monovalent ions from divalent metal ions.
Ion separation means that the selectivity exists when metal ions in the solution pass through the membrane, monovalent metal ions such as lithium ions, sodium ions, potassium ions and the like, divalent metal ions such as magnesium ions, calcium ions and the like, and monovalent ions and divalent ions are more easily trapped by the sub-nano porous PET membrane due to the large diameter of hydrated divalent ions and more charged ions; and the flux of monovalent ions passing through the sub-nano porous PET film is high, so that the separation of the monovalent ions and the divalent ions in the solution is realized.
The embodiment provides the application of the sub-nano porous PET film, which has the advantages of low cost, ion separation function, stable performance and good ion separation effect; when the solution contains the mono-valent metal ion and the divalent metal ion, the sub-nano porous PET film can separate the monovalent ion and intercept the divalent ion simply and with low energy consumption.
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. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but the present invention is described in detail with reference to the foregoing embodiments, and it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or that equivalents may be substituted for part of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment are included in the protection scope of the present invention.
Claims (10)
1. A preparation method of a sub-nano porous PET film is characterized in that: the method comprises the following steps:
under the vacuum condition, the PET film is subjected to vertical uniform irradiation by utilizing a heavy ion accelerator, and the number of heavy ions of the irradiated PET film is 10 8 ～10 12 ions/cm 2 ；
And (3) soaking the irradiated PET film by using an organic solvent to form a plurality of sub-nano pore canals which are parallel to each other and perpendicular to the surface of the film, taking out and cleaning the organic solvent residue after soaking, and naturally airing to obtain the sub-nano porous PET film, wherein the sub-nano pore canals are through holes, and the diameters of the sub-nano pore canals are sub-nano grade.
2. The method for preparing a sub-nano porous PET film according to claim 1, wherein: the heavy ions are one or more of elements with atomic numbers greater than or equal to 36.
3. The method for preparing a sub-nano porous PET film according to claim 1, wherein: the energy of the heavy ions is 1-30 MeV/u.
4. The method for preparing a sub-nano porous PET film according to claim 1, wherein: the irradiation density was 10 8 ～10 12 ions/cm 2 。
5. The method for preparing a sub-nano porous PET film according to claim 1, wherein: the organic solvent comprises at least one of methanol, N-hexane, isopropanol, N-dimethylformamide, dimethyl sulfoxide and tetrahydrofuran.
6. The method for preparing a sub-nano porous PET film according to claim 1, wherein: the PET film has a thickness of 1-50 μm.
7. The method for preparing a sub-nano porous PET film according to claim 1, wherein: the density of the sub-nanometer pore canal is 10 8 ～10 12 Individual/cm 2 。
8. The method for preparing a sub-nano porous PET film according to claim 1, wherein: the soaking time is 1-24 h.
9. The method for preparing a sub-nano porous PET film according to claim 1, wherein: the temperature of the organic solvent for soaking the membrane is 18-60 ℃.
10. An application of a sub-nano porous PET film is characterized in that: a sub-nanoporous PET film comprising a sub-nanoporous PET film according to any one of claims 1 to 9 for ion separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211608024.6A CN116099388A (en) | 2022-12-14 | 2022-12-14 | Preparation method and application of sub-nano porous PET film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211608024.6A CN116099388A (en) | 2022-12-14 | 2022-12-14 | Preparation method and application of sub-nano porous PET film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116099388A true CN116099388A (en) | 2023-05-12 |
Family
ID=86266677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211608024.6A Pending CN116099388A (en) | 2022-12-14 | 2022-12-14 | Preparation method and application of sub-nano porous PET film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116099388A (en) |
-
2022
- 2022-12-14 CN CN202211608024.6A patent/CN116099388A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xu et al. | Preparation and characterization of Ti/SnO2-Sb electrode with copper nanorods for AR 73 removal | |
| EP2857441B1 (en) | Ion exchange membrane used in reverse electrodialysis device and reverse electrodialysis device including this membrane | |
| US9982104B2 (en) | Reverse electrodialysis device having enhanced maximum power density with ultra-thin ion exchange membranes | |
| Iddya et al. | Efficient ammonia recovery from wastewater using electrically conducting gas stripping membranes | |
| CN108905646B (en) | Graphene PVDF (polyvinylidene fluoride) composite conductive ultrafiltration membrane and preparation and pollutant removal methods thereof | |
| JP2016540118A (en) | Electrochemical cell with graphene-covered electrode | |
| CN100490957C (en) | Method for preparing polyimides microporous separation membrane | |
| WO2018214723A1 (en) | Manufacturing method of hybrid osmotic power generation film containing block copolymer film and functional porous film | |
| CN1807224A (en) | Si base membrane nanometer pore canal and its preparation method | |
| JP6910460B2 (en) | Water decomposition equipment | |
| CN112973458B (en) | Ion track porous membrane and physical preparation method and application thereof | |
| CN116099388A (en) | Preparation method and application of sub-nano porous PET film | |
| CN218709328U (en) | Ion separation device | |
| Maeda et al. | Reduction of carbon dioxide on partially-immersed Au plate electrode and Au-SPE electrode | |
| CN107998900B (en) | Preparation method of anion exchange membrane with single-multivalent selective separation function | |
| CN116139713A (en) | Preparation method of PI membrane for ion separation | |
| KR102004687B1 (en) | A module for lithium ion recycling of seawater and method for recycling lithium ion thereof | |
| KR20100013306A (en) | Inorganic conductive membrane, fuel cell containing the same, and method for manufacturing thereof | |
| CN108948387B (en) | Ion-selective nanochannel membrane and preparation method thereof | |
| CN110639514A (en) | High-stability silver oxide-graphene composite material and preparation method and application thereof | |
| CN113683799B (en) | Preparation method and application of high-strength and high-ion-selectivity film | |
| CN115353247B (en) | Ion separation device, method and application | |
| CN115845632B (en) | Anion exchange membrane and preparation method and application thereof | |
| CN113463133B (en) | Electrochemical device, application thereof and method for recycling metal in industrial wastewater | |
| Nishimura et al. | Electrodialytic transport properties of cation exchange membranes prepared from poly (vinyl alcohol) and poly (vinyl alcohol-co-2-acrylamido-2-methylpropane sulfonic acid) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |