CN106669452A - Polytetrafluoroethylene fiber membrane - Google Patents
Polytetrafluoroethylene fiber membrane Download PDFInfo
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- CN106669452A CN106669452A CN201510766522.7A CN201510766522A CN106669452A CN 106669452 A CN106669452 A CN 106669452A CN 201510766522 A CN201510766522 A CN 201510766522A CN 106669452 A CN106669452 A CN 106669452A
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- vestibule
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- 239000000835 fiber Substances 0.000 title claims abstract description 39
- 239000012528 membrane Substances 0.000 title claims abstract description 24
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 19
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 18
- -1 Polytetrafluoroethylene Polymers 0.000 title claims abstract description 14
- 239000011148 porous material Substances 0.000 claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 47
- 238000009827 uniform distribution Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000002834 transmittance Methods 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims description 22
- 230000037431 insertion Effects 0.000 claims description 22
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000009826 distribution Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 11
- 239000002253 acid Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 229940058401 polytetrafluoroethylene Drugs 0.000 description 10
- 230000004907 flux Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001523 electrospinning Methods 0.000 description 2
- 238000010041 electrostatic spinning Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229920001661 Chitosan Polymers 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
-
- 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
- B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
- B01D61/364—Membrane distillation
-
- 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
- B01D69/08—Hollow fibre membranes
-
- 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
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/36—Polytetrafluoroethene
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Artificial Filaments (AREA)
Abstract
The invention provides a polytetrafluoroethylene fiber membrane which comprises a polytetrafluoroethylene material body, wherein polytetrafluoroethylene takes the shape of fiber; the diameter of the fiber is greater than 200 nm and less than or equal to 2000 nm; the polytetrafluoroethylene material body is provided with pore cavities of which the apertures are 10-2000 nm and cavity walls formed by three-dimensional spaces surrounding the pore cavities; the pore cavities are in uniform distribution; the pore cavities are communicated in a three-dimensional manner; the pore cavities are in uniform distribution means that the pore cavities are in uniform distribution in a porous material by any unit-grade volume; the porosity is greater than or equal to 75%; the light transmittance is 50% or higher; the tensile strength is 28 N/mm<2> or higher; and the water resistance is 4 kg/cm<2> or higher. A specific and definite measurement mode is provided for pore cavity distribution uniformity of the polytetrafluoroethylene fiber membrane, the pore distribution uniformity of the porous material and a multi-stage porous structure of the porous material is measured by small-unit grade volume, the porous structure is high in uniformity, and thus uniformity consistency of different properties of the porous material can be ensured.
Description
Technical field
The present invention relates to a kind of porous material, specifically a kind of polytetrafluoroethylfiber fiber film, are particularly well-suited to Membrane Materials.
Background technology
Solid containing certain amount hole, porous material, is a kind of material that network structure is made up of insertion or blind bore hole.For continuous media material, porous material typically has the advantages that relative density is low, specific strength is high, specific surface area is high, lightweight, sound insulation, heat-insulated, good penetrability.According to the difference of pore size, porous material can be divided into micropore again（Aperture is less than 2 nm）It is material, mesoporous（Aperture 2-50 nm）Material and macropore（Aperture is more than 50 nm）Material.
Porous material is distinguished by its material, can be divided into metal polyporous material and non-metal porous material.Non-metal porous material typically has the features such as specific surface area is big, density is little, thermal conductivity is little, relative density is little, porosity is big, in catalyst（Including carrier）, adsorbent, insulation, thermal insulation, sewage and exhaust-gas treatment, filter liquid and gas（Or even bacterium）, light building material, the field such as environmental protection, improved soil, chemical industry is with a wide range of applications.Wherein, polytetrafluoroethylporous porous membrane material is with the performance such as its temperature stability, chemical stability, electric insulation, fire-retardant, self-lubricating, and its range of application is extremely wide.However, the randomness, scrambling due to pore structure, it still can not meet many application performances.
In many applications, it is required for its porous material itself uniform, its pore size, hole are evenly distributed so that performance uniformity, but in fact, many porous materials do not reach this requirement, its uniformity supplies；Despite material call oneself and reached higher uniformity, but its uniformity is still the uniformity under large volume yardstick, if being weighed with small size yardstick, such as take up an official post in material and take the said three-dimensional body that polylith volume is not more than a cubic centimetre, its quality is surveyed respectively, its uniformity coefficient difference is still very big, thus result in polytetrafluoroethylporous porous membrane material various performances such as intensity, elastic modelling quantity, flux etc. it is uneven, have a strong impact on its function.
The content of the invention
It is an object of the invention to provide architecture, controllable, high uniformity polytetrafluoroethylfiber fiber film.
The purpose of the present invention is realized by following measures：
A kind of polytetrafluoroethylfiber fiber film, including polytetrafluoroethylmaterial material body, polytetrafluoroethylene (PTFE) is in threadiness, 200nm ＜ fibre diameters are≤2000nm, the cavity wall that body has the vestibule in 10nm～2000nm apertures and formed around vestibule in three dimensions, its vestibule is in uniform distribution, the three-dimensional insertion of each vestibule, and vestibule refers to each vestibule on the porous material under arbitrary unit level volume in uniform distribution in uniform distribution；Porosity more than 75%, light transmittance is more than 50%, tensile strength 28N/mm2More than, water pressure resistance 4kg/cm2More than.
Specifically, above-mentioned polytetrafluoroethylfiber fiber film, vestibule with 200～2000nm apertures and the cavity wall formed around vestibule in three dimensions, arrange subordinate's vestibule of 10～150nm, vestibules at different levels each three-dimensional insertion and vestibule at different levels also insertion each other each other in cavity wall；Vestibule is in uniform distribution, and vestibule refers to each vestibule on the porous material under arbitrary unit level volume in uniform distribution in uniform distribution.
Specifically, above-mentioned unit level volume refers to cubic centimetre level or cubic millimeter level or more subsection level volume.
More specifically, above-mentioned vestibule is referred in uniform distribution be not more than each said three-dimensional body of a cubic centimetre and formed objects in the take up an official post volume that takes of the porous material, their quality is substantially suitable.
More specifically, above-mentioned quality quite refers to the said three-dimensional body for appointing the multiple volumes for taking to be not more than a cubic centimetre and formed objects on the porous material substantially, claim its quality respectively, the mean value of their quality is obtained, and arbitrary three-dimensional weight is not more than the 4% of said three-dimensional body mass average value relative to the absolute value of the bias of mass average value.
Further, the multistage material take up an official post the volume that takes be not more than one cubic millimeter formed objects said three-dimensional body, their quality are substantially suitable.
More specifically, the quality quite refers to the said three-dimensional body of the formed objects for appointing the multiple volumes for taking to be not more than a cubic millimeter on the porous material substantially, claim its quality respectively, the mean value of their quality is obtained, and arbitrary three-dimensional weight is not more than the 4% of said three-dimensional body mass average value relative to the absolute value of the bias of mass average value.
Preferably, above-mentioned polytetrafluoroethylfiber fiber film is made up of multistage porous material, and body is the vestibule being classified with material pore size, and the cavity wall in three dimensions around vestibule is constituted, subordinate's vestibule, vestibules at different levels each three-dimensional insertion and vestibule at different levels also insertion each other each other are set in cavity wall.More specifically, next stage porous material constitutes the cavity wall of upper level vestibule.The cavity wall of higher level's vestibule is constituted by the multistage porous material of its subordinate is compound, or is constituted by the porous materials at different levels of its subordinate are compound, and material can be caused to meet specific functional requirement.
Specifically, every grade of porous material of material body is a continuous structure body certainly.Maximum external boundary per one-level porous material is suitable with whole material body space boundary.I.e. every grade porous material can be present in body as the porous material of one-level independence, and with its physical and chemical performance alone.Such structure can cause the physical and chemical performance of porous materials at different levels difference, have different physical and chemical performances in the whole space of relatively-stationary material, better meet many functional requirements.
Beneficial effect
1., the invention provides a kind of polytetrafluoroethylfiber fiber film with loose structure, specify that its version, the hierarchy form of its vestibule and its uniformity structure can meet several functions demand.
2. the present invention is evenly distributed to the vestibule of polytetrafluoroethylfiber fiber film and proposes concrete and clear and definite metric form, specify that it is to get off to measure porous material and the pore size distribution uniformity of its multilevel hierarchy with the yardstick of subsection level volume, such loose structure is high uniformity, so as to ensure that the uniformity consistency of each performance of porous material.
3. polytetrafluoroethylfiber fiber film of the present invention is three-dimensional insertion, including every grade of hole three-dimensional communication, and hole at different levels mutually three-dimensional insertion, and connectivity is good, can fully meet the functional requirement of material.
4. the polytetrafluoroethylfiber fiber film of the present invention is the hydrophobic surface with multistage coarse structure.Surface water contact angle can reach more than 165 °.
5. poly tetrafluoroethylene has diffusing reflection phenomenon, polytetrafluoroethylstephanoporate stephanoporate tunica fibrosa, the such as film properties such as pore size distribution, hierarchy, porosity, hole shape architectural characteristic, technique etc. and light transmittance, mechanical strength, water pressure resistance are relevant, the polytetrafluoroethylfiber fiber film of the present invention, bright cunning that film color is bright, gloss becomes clear, without the need for supporting, form stable, thickness is controllable, is applied to Membrane Materials process, flux>38L/m2H, more than 99.8%, tensile strength can reach 32N/mm to rejection2More than, water pressure resistance 8kg/cm2More than.
6. the polytetrafluoroethylfiber fiber film of the present invention, can be the film of the different shapes such as flat, tubular type, hollow fiber form or rolling and specification, and without the need for supporting, form stable, thickness is controllable.
Specific embodiment
Specific embodiment gives detailed embodiment premised on technical solution of the present invention, but protection scope of the present invention is not limited only to following embodiments.Without departing from change above-mentioned technological thought of the invention in the case of, according to the ordinary technical knowledge and/or customary means of this area, it is clear that the replacement or change of various ways can also be made, and all should be included within the scope of the present invention.
Embodiment
1
The polytetrafluoroethylfiber fiber film of the present invention, with second hole structure, wherein, there is the second level vestibule for being uniformly distributed, being mutually communicated in the cavity wall of the first order vestibule be uniformly distributed, being mutually communicated, and the also insertion each other each other of two-stage hole, the insertion is three-dimensional insertion.Every grade of porous material of material body is a continuous structure body certainly.Total effective drainage porosity is 75%, and fibre diameter is 500nm ± 20 nm, and macropore average pore size is 1000nm, there is the insertion aperture of average pore size 50nm in the cavity wall of macropore.
It is machined into method to take up an official post in the porous material said three-dimensional body of the same size for taking 9 10mm × 10mm × 10mm, its quality is tested with plum Teller-support benefit XP26 Microbalance balances, as a result it is as shown in table 1, wherein, intensive reading is expressed as a percentage with the absolute value of the bias of mean value, its value be relative to mean value absolute value of the bias divided by mass average value, as shown in Table 1, its mass deviation is not more than 4%.
Determination of light transmittance：Using LCD5200 photoelectric characteristic testers, scanning 380-780nm wave bands calculate light transmittance of the sample to visible ray according to each wave band distribution character of sunshine that GBT2680-1994 is announced.
Table 1
| Piece number | Quality（mg） | Relative to the absolute value of the bias of mean value（%） |
| 1 | 703.655 | 0.9% |
| 2 | 703.939 | 0.9% |
| 3 | 717.350 | 1.0% |
| 4 | 722.294 | 1.7% |
| 5 | 695.606 | 2.1% |
| 6 | 709.895 | 0.0% |
| 7 | 701.682 | 1.2% |
| 8 | 714.150 | 0.6% |
| 9 | 723.142 | 1.8% |
| Mass average value | 710.190 |
The preparation method of the porous polytetrafluoroethylene material is：
（1）By the ptfe emulsion of solid content 60%, particle diameter 50nm shitosans, 9%（Mass ratio）Gelatin solution, 18wt% starch emulsions, uniform mixing, according to 55：30：9：5 mass ratioes, are made into spinning solution；
（2）Under vacuum, polytetrafluoroethylene (PTFE) precursor film is produced using electrospinning process in orientation electrostatic spinning fiber silk device, under vacuum 110 DEG C of process 20min；
（3）Precursor film is wound into 5 layers to cylinder hold mode, is sent into tube furnace and is sintered in vacuum or protective atmosphere, sintered and sintered using temperature programmed control zonal cooling, with the speed of 8 DEG C/min from room temperature to 170 DEG C, at 170 DEG C 50min is incubated；With the ramp of 8 DEG C/min to 280 DEG C, at 280 DEG C 60min is incubated；With the ramp of 2 DEG C/min to 360 DEG C, at 360 DEG C 15min is incubated；With the ramp of 8 DEG C/min to 400 DEG C, at 400 DEG C 80min is incubated.
（4）Temperature programmed control cooling after sintering, according to routine techniques subsequent treatment, after extracting cylinder out, cuts off, and obtains the flat porous Teflon tunica fibrosa with two-stage pore structure, and thickness is 176 μm.
, without the need for supporting, form stable, thickness is controllable, can be used for gas-liquid separation and Liquid liquid Separation for the polytetrafluoroethylfiber fiber film, realizes that Accurate Classification is filtered, such as it is applied to two-spot or many vigour（Liquid）The filtration of body, its flux is big, and rejection is high, is difficult to be contaminated（Such as the infiltration fouling membrane of multi-component liquid）, the advantage with efficient long-acting.169 ° of film water contact angle, light transmittance is 58%, tensile strength 30N/mm2More than, water pressure resistance 5kg/cm2More than.
Such as, in being applied to the Membrane Materials of acid/alcohol-water-non-volatile solute system, total flux can reach 38kg/m2More than h, in system non-volatile solute rejection more than 99.8%, volatilization alcohol/acid separation factor=[alcohol/acid mass fraction in distillate ×（1- material liquids alcohol/acid mass fraction）] ÷ [material liquid alcohol/acid mass fraction ×（1- distillates alcohol/acid mass fraction）] can reach more than 10.
Embodiment
2
The polytetrafluoroethylfiber fiber film of the present invention, with three-level pore structure, wherein, there is the second level vestibule for being uniformly distributed, being mutually communicated in the cavity wall of the first order vestibule be uniformly distributed, being mutually communicated, and the also insertion each other each other of two-stage hole, the insertion is three-dimensional insertion.Every grade of porous material of material body is a continuous structure body certainly.Total effective drainage porosity is 80%, and fibre diameter is 700 ± 20 nm, and macropore average pore size is 1500nm, there is the insertion second hole of average pore size 100nm in the cavity wall of macropore, there is the third level hole of average pore size 10nm insertion on the hole wall in second level hole.
It is machined into method to take up an official post in the porous material said three-dimensional body of the same size for taking 9 10mm × 10mm × 10mm, its quality is tested with plum Teller-support benefit XP26 Microbalance balances, as a result it is as shown in table 1, wherein, intensive reading is expressed as a percentage with the absolute value of the bias of mean value, its value be relative to mean value absolute value of the bias divided by mass average value, as shown in Table 2, its mass deviation is not more than 4%.
Table 2
| Piece number | Quality（mg） | Relative to the absolute value of the bias of mean value（%） |
| 1 | 544.988 | 0.5% |
| 2 | 538.318 | 0.7% |
| 3 | 534.743 | 1.4% |
| 4 | 545.727 | 0.6% |
| 5 | 534.739 | 1.4% |
| 6 | 534.262 | 1.5% |
| 7 | 550.025 | 1.4% |
| 8 | 558.842 | 3.1% |
| 9 | 538.219 | 0.7% |
| Mass average value | 542.207 |
The preparation method of the porous polytetrafluoroethylene material is：
（1）By PTFE fine powder end, the polyethylene glycol mixing that molecular weight is 1000,380 DEG C are heated with stirring to, persistently stir 60min, be quickly cooled to room temperature and crushed, carried out crushing at subzero degree Celsius and obtain polytetrafluoroethylgranule granule；
（2）Particle diameter is distributed as the emulsion of solid content 60% for 200nm polytetrafluoroethylgranule granules, by its with particle diameter 100nm shitosans, 9%（Mass ratio）Chitosan solution, 15wt% starch emulsions, uniform mixing, according to 55：30：9：5 mass ratioes, are made into spinning solution；
（3）Under vacuum, polytetrafluoroethylene (PTFE) precursor film is produced using electrospinning process in orientation electrostatic spinning fiber silk device, under vacuum 110 DEG C of process 20min；
（4）Precursor film is wound into 5 layers to diameter 2mm cylinders hold mode, is sent into tube furnace and is sintered in vacuum or protective atmosphere, sintered and sintered using temperature programmed control zonal cooling, with the speed of 8 DEG C/min from room temperature to 180 DEG C, at 180 DEG C 60min is incubated；With the ramp of 8 DEG C/min to 300 DEG C, at 300 DEG C 60min is incubated；With the ramp of 2 DEG C/min to 360 DEG C, at 360 DEG C 20min is incubated；With the ramp of 8 DEG C/min to 400 DEG C, at 400 DEG C 80min is incubated.
（5）Temperature programmed control cooling after sintering, according to routine techniques subsequent treatment, obtains the porous Teflon hollow membrane with three-level pore structure, and thickness is 184 μm, hollow-fibre membrane diameter 2mm.
, without the need for supporting, form stable, thickness is controllable, can be used for gas-liquid separation and Liquid liquid Separation for the polytetrafluoroethylfiber fiber film, realizes that Accurate Classification is filtered, such as it is applied to two-spot or many vigour（Liquid）The filtration of body, its flux is big, and rejection is high, is difficult to be contaminated（Such as the infiltration fouling membrane of multi-component liquid）, the advantage with efficient long-acting.173 ° of film water contact angle, light transmittance is 60%, tensile strength 28N/mm2More than, water pressure resistance 6kg/cm2More than.
Such as, it is applied to polynary（Or mixing）In the Membrane Materials of alcohol/acid-water-non-volatile solute system, total flux can reach 40kg/m2More than h, in system non-volatile solute rejection more than 99.9%, volatilization alcohol/acid separation factor=[alcohol/acid mass fraction in distillate ×（1- material liquids alcohol/acid mass fraction）] ÷ [material liquid alcohol/acid mass fraction ×（1- distillates alcohol/acid mass fraction）] can reach more than 10.
Claims (11)
1. a kind of polytetrafluoroethylfiber fiber film for Membrane Materials, including polytetrafluoroethylmaterial material body, polytetrafluoroethylene (PTFE) is in threadiness, 200nm ＜ fibre diameters are≤2000nm, the cavity wall that body has the vestibule in 10nm～2000nm apertures and formed around vestibule in three dimensions, its vestibule is in uniform distribution, the three-dimensional insertion of each vestibule, and vestibule refers to each vestibule on the porous material under arbitrary unit level volume in uniform distribution in uniform distribution；Porosity of=75%, light transmittance is more than 50%, tensile strength 28N/mm2More than, water pressure resistance 4kg/cm2More than.
2. the polytetrafluoroethylfiber fiber film of Membrane Materials is used for as claimed in claim 1, vestibule with 200～2000nm apertures and the cavity wall formed around vestibule in three dimensions, subordinate's vestibule of 10～150nm, vestibules at different levels each three-dimensional insertion and vestibule at different levels also insertion each other each other are set in cavity wall；Vestibule is in uniform distribution, and vestibule refers to each vestibule on the porous material under arbitrary unit level volume in uniform distribution in uniform distribution.
3. the polytetrafluoroethylfiber fiber film of Membrane Materials is used for as claimed in claim 1 or 2, and the unit level volume refers to cubic centimetre level or cubic millimeter level or more subsection level volume.
4. the polytetrafluoroethylfiber fiber film for Membrane Materials as described in claim 1,2 or 3, institute's vestibule is referred in uniform distribution and be not more than each said three-dimensional body of a cubic centimetre and formed objects in the take up an official post volume that takes of the porous material, and their quality is substantially suitable.
5. the polytetrafluoroethylfiber fiber film of Membrane Materials is used for as claimed in claim 4, the quality quite refers to the said three-dimensional body for appointing the multiple volumes for taking to be not more than a cubic centimetre and formed objects on the porous material substantially, claim its quality respectively, the mean value of their quality is obtained, and arbitrary three-dimensional weight is not more than the 4% of said three-dimensional body mass average value relative to the absolute value of the bias of mass average value.
6. the polytetrafluoroethylfiber fiber film for Membrane Materials as described in claim 1-5 is arbitrary, the multistage material take up an official post the volume that takes be not more than one cubic millimeter formed objects said three-dimensional body, their quality are substantially suitable.
7. the polytetrafluoroethylfiber fiber film of Membrane Materials is used for as claimed in claim 6, the quality quite refers to the said three-dimensional body of the formed objects for appointing the multiple volumes for taking to be not more than a cubic millimeter on the porous material substantially, claim its quality respectively, the mean value of their quality is obtained, and arbitrary three-dimensional weight is not more than the 4% of said three-dimensional body mass average value relative to the absolute value of the bias of mass average value.
8. the polytetrafluoroethylfiber fiber film for Membrane Materials as described in claim 1-7 is arbitrary, it is made up of multistage porous material, body is the vestibule being classified with material pore size, and the cavity wall in three dimensions around vestibule is constituted, subordinate's vestibule, vestibules at different levels each three-dimensional insertion and vestibule at different levels also insertion each other each other are set in cavity wall.
9. the polytetrafluoroethylfiber fiber film for Membrane Materials as described in claim 1-8 is arbitrary, next stage porous material constitutes the cavity wall of upper level vestibule.
10. the polytetrafluoroethylfiber fiber film for Membrane Materials as described in claim 1-8 is arbitrary, the cavity wall of higher level's vestibule is constituted by the multistage porous material of its subordinate is compound.
11. polytetrafluoroethylfiber fiber films for Membrane Materials as described in claim 1-8 is arbitrary, the cavity wall of higher level's vestibule is constituted by the porous materials at different levels of its subordinate are compound.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510766522.7A CN106669452A (en) | 2015-11-11 | 2015-11-11 | Polytetrafluoroethylene fiber membrane |
| PCT/CN2016/105280 WO2017080478A1 (en) | 2015-11-11 | 2016-11-10 | Polytetrafluoroethylene fiber membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510766522.7A CN106669452A (en) | 2015-11-11 | 2015-11-11 | Polytetrafluoroethylene fiber membrane |
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| CN106669452A true CN106669452A (en) | 2017-05-17 |
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| CN201510766522.7A Withdrawn CN106669452A (en) | 2015-11-11 | 2015-11-11 | Polytetrafluoroethylene fiber membrane |
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| Country | Link |
|---|---|
| CN (1) | CN106669452A (en) |
| WO (1) | WO2017080478A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030062644A1 (en) * | 2001-03-19 | 2003-04-03 | Shinro Oyama | Polytetrafluoroethylene film and manufacture of same |
| CN103894077A (en) * | 2014-04-10 | 2014-07-02 | 江南大学 | Composite filter membrane with multidimensional pore structure and preparation method thereof |
| CN104906968A (en) * | 2014-03-13 | 2015-09-16 | 成都百途医药科技有限公司 | Teflon membrane and preparation method thereof |
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| JP2012130874A (en) * | 2010-12-22 | 2012-07-12 | Sumitomo Electric Ind Ltd | Fresh water generator, and fresh water generation system |
| CN104211245B (en) * | 2013-06-03 | 2016-07-06 | 洁海瑞泉膜技术（北京）有限公司 | A kind of processing method of percolate embrane method concentrated solution |
| CN105013341B (en) * | 2014-04-22 | 2018-02-23 | 四川百途环保材料科技有限公司 | A kind of preparation method of polytetrafluoroethylene (PTFE) super-hydrophobic film |
| CN105013344B (en) * | 2014-04-22 | 2017-12-08 | 成都百途医药科技有限公司 | A kind of preparation method of super-hydrophobic polytetrafluoroethylfiber fiber film |
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- 2015-11-11 CN CN201510766522.7A patent/CN106669452A/en not_active Withdrawn
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2016
- 2016-11-10 WO PCT/CN2016/105280 patent/WO2017080478A1/en active Application Filing
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| US20030062644A1 (en) * | 2001-03-19 | 2003-04-03 | Shinro Oyama | Polytetrafluoroethylene film and manufacture of same |
| CN104906968A (en) * | 2014-03-13 | 2015-09-16 | 成都百途医药科技有限公司 | Teflon membrane and preparation method thereof |
| CN103894077A (en) * | 2014-04-10 | 2014-07-02 | 江南大学 | Composite filter membrane with multidimensional pore structure and preparation method thereof |
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| WO2017080478A1 (en) | 2017-05-18 |
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