CN108993177A - A kind of preparation method of the concave-convex non-woven cloth of membrane distillation - Google Patents
A kind of preparation method of the concave-convex non-woven cloth of membrane distillation Download PDFInfo
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- CN108993177A CN108993177A CN201810801518.3A CN201810801518A CN108993177A CN 108993177 A CN108993177 A CN 108993177A CN 201810801518 A CN201810801518 A CN 201810801518A CN 108993177 A CN108993177 A CN 108993177A
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- woven cloth
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- 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
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
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- 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
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- 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
- B01D71/38—Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Manufacturing & Machinery (AREA)
- Nonwoven Fabrics (AREA)
- Artificial Filaments (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a kind of membrane distillation preparation methods of concave-convex non-woven cloth, belong to fabrics for industrial use technical field.The preparation method of the membrane distillation non-woven cloth, comprising the following steps: the 1) preparation of precursor assorted fibre non-woven cloth；2) heat treatment of precursor assorted fibre non-woven cloth；3) the further provided for contouring processing of nonwoven fabric surface.The characteristics of prepared concave-convex non-woven cloth has high porosity, low heat transfer property and hydrophobicity strong, high temperature resistant, corrosion resistance has good application characteristic in membrane distillation field.
Description
Technical field
The present invention relates to a kind of membrane distillation preparation methods of concave-convex non-woven cloth, belong to fabrics for industrial use technology neck
Domain.
Background technique
Film distillation technology is a kind of novel separation skill using hydrophobic microporous membrane two sides steam pressure difference as mass transfer force
Art has the characteristics that equipment simple, operating pressure and temperature is low, separative efficiency is high, be widely used in seawater/brackish water desalination,
The fields such as recirculated cooling water/reverse osmosis concentrated water zero discharge, drug/food/chemical products low-temp low-pressure concentration.Membrane distillation film,
As the key and core of film distillation technology, should have hydrophobicity is strong, porosity is high, mechanical strength is big, heat transfer coefficient is small, stablize
The features such as property (including chemical stability, thermal stability etc.) is good.
Common membrane distillation film includes polyvinylidene fluoride film, polypropylene screen, polytetrafluoroethylene film etc..Wherein, polytetrafluoro
The excellent characteristics such as vinyl film hydrophobicity is strong, heat transfer coefficient is low, heat transfer coefficient is small, stability is good, and it is widely used in membrane distillation neck
Domain (C.-L.Lai, R.-M.Liou, S.-H.Chen, G.-W.Huang and K.-R.Lee.Preparation and
characterization of plasma-modified PTFE membrane and its application in
Direct contact membrane distillation.Desalination.2011,267:184-192；S.Feng,
Z.Zhong, Y.Wang, W.Xing and E.Drioli.Progress and perspectives in PTFE
Membrane:Preparation, modification, and applications.Journal of Membrane
Science.2018,549:332-349.), especially number acid/alkalinity is strong, the severe ring such as toxin concentration height, fluid temperature height
Border.But its porosity is low, mechanical strength is poor, limit its further application (Y.Huang, Q.-L.Huang, H.Liu,
C.-X.Zhang, Y.-W.You, N.-N.Li and C.-F.Xiao.Preparation, characterization, and
applications of electrospun ultrafine fibrous PTFE porous membranes.Journal
Of Membrane Science.2017,523:317-326.).Have benefited from the exploitation of electrostatic spinning polytetrafluoroethylfiber fiber film
(Xiong Jie, Huo Peng fly the Zhejiang preparation method [P] of polytetrafluoroethylsuperfine superfine fiber porous membrane: CN101530750,2009-09-
16；Chen Meiyu, to chat about, Sun Runjun, Liu is in a kind of Shaanxi the preparation method of polytetrafluoroethylene fibre [P] of female:
CN103276466A, 2013-09-04.), effectively increase the porosity of polytetrafluoroethylene film.However, polytetrafluoroethylene film
Mechanical strength increase in porosity, fibrous refinement during further reduced.In addition, during long-play,
Hydrophobic polytetrafluoroethylene film is easy to pollute so that its long-play stability it is poor (A.Hausmann, P.Sanciolo,
T.Vasiljevic, M.Weeks, K.Schroen, S.Gray and M.Duke.Fouling of dairy components
on hydrophobic polytetrafluoroethylene(PTFE)membranes for membrane
Distillation.Journal of Membrane Science.2013,442:149-159；K.Wang, D.Hou,
J.Wang, Z.Wang, B.Tian and P.Liang.Hydrophilic surface coating on hydrophobic
PTFE membrane for robust anti-oil-fouling membrane distillation.Applied
Surface Science.2018,450:57-65.).
Based on this, numerous researchers have developed many strategies for improving polytetrafluoroethylene (PTFE) strength, including SiO is blended2
Particle (Y Liang, J.Ju, N.Deng, X.Zhou, J.Yan, W.Kang and B.Cheng.Super-hydrophobic
self-cleani ng bead-like SiO2@PTFE nanofiber membranes for waterproof-
Breathable applications.Applied Su rface Science.2018,442:54-64.), but it is mixed
SiO2Syringe needle is easily blocked during the spinning process, it is difficult to realize the continuity of spinning；With chitosan compound (Hao Rongyao, Sui Shuying, Zhu
The preparation of flat polytetrafluoroethylene (PTFE)-chitosan complex film and the research of performance study [J] textile science, 2006 (04): 35-40.),
But the method requires film-forming temperature, consumes energy in production process, and this method also requires coating thickness, production technology
It is more difficult to control；And the method that electrostatic spinning is blended in PEO/PTFE-PAI (preparation of Feng Yan polytetrafluoroethylfiber fiber film and its changes
Property [D] Jiangxi Normal University, 2016.), but this method, with the increase of PAI content, contact angle becomes smaller, hydrophobicity decline.
So far, it is a kind of can high-efficiency and continuous production high-performance (hydrophobicity is strong, porosity is high, mechanical strength is big, conduct heat
Coefficient is low, stability is good) membrane distillation also urgently developed with film.
Summary of the invention
Above-mentioned background technique there are aiming at the problem that, it is concave-convex non-woven that the purpose of the present invention is to provide a kind of membrane distillations
The preparation method of cloth, this kind of method efficiently, can be prepared continuously with strong non-of high porosity, low thermal conductiv-ity energy and hydrophobicity
Woven cloths, and flux of the made non-woven cloth in membrane distillation application is high, resistance salt rate is high, long-play effect stability.
The preparation method of the concave-convex non-woven cloth of the membrane distillation, preparation method include the following steps:
(1) preparation of precursor assorted fibre non-woven cloth: ptfe emulsion, boric acid solution and polyvinyl alcohol is molten
The spinning solution and 4 of liquid composition, the spinning solution that 4 '-diaminodiphenyl ethers, pyromellitic dianhydride and dimethylformamide form are synchronous
Electrospinning spinning is prepared on receiving lace curtaining by micron order polytetrafluoroethylene (PTFE)/polyvinyl alcohol and nanoscale polyamic acid precursor
The non-woven cloth of assorted fibre composition；
The polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber diameter range is 0.7-1.2 μm；The polyamic acid
The diameter range of nanofiber is 100-300nm；The polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber and polyamic acid nanometer
The quality hybrid ratio of fiber is 3: 1-1: 3；
(2) heat treatment of precursor assorted fibre non-woven cloth: by the precursor assorted fibre non-woven cloth of preparation with one
Constant speed degree is delivered in dual temperature area heat treatment drying chamber, at a certain temperature will be before polytetrafluoroethylene (PTFE)/polyvinyl alcohol and polyamic acid
Body assorted fibre non-woven cloth is converted to micron order coarse structure polytetrafluoroethylene (PTFE) and nanoscale polyimides assorted fibre group
At non-woven cloth；
The diameter range of the polytetrafluoroethylene (PTFE) micrometer fibers is 1.0-1.5 μm；The polyimide acid Nanowire
The diameter range of dimension is 120-350nm；
(3) the further provided for contouring processing of nonwoven fabric surface: the non-woven cloth after heat treatment is delivered in concave-convex shaped roller and is carried out
Concave-convex surfaceization processing prepares the membrane distillation with concave-convex non-woven cloth；
The membrane distillation is with concave-convex non-woven cloth with a thickness of 60-150 μm.
The preparation method of the concave-convex non-woven cloth of the membrane distillation, it is characterised in that the heat treatment drying chamber is dual temperature
Area's drying chamber, the first warm area temperature range are 290-310 DEG C, and the second warm area temperature range is 380-400 DEG C, and drying chamber length range is
20-40m, the conveying are 0.5-2.5m/min.
The preparation method of the concave-convex non-woven cloth of the membrane distillation, it is characterised in that the concave-convex shaped roller is by having
The metal upper roller of salient point and the rubber lower roll composition of smooth surface.
Due to using the technology described above, the concave-convex non-woven cloth prepared by the present invention has the following characteristics that
(1) the bumps non-woven cloth of membrane distillation prepared by mixes fibre by micron order polytetrafluoroethylene (PTFE) and nanoscale polyimides
Dimension composition, micron order polytetrafluoroethylene (PTFE) provides excellent hydrophobic performance and chemical stability, and the height of nanoscale polyimides
Powerful feature effectively raises the mechanical property of the concave-convex non-woven cloth of membrane distillation；In addition, nanoscale polyimides reduce it is non-
Woven cloths aperture is conducive to the raising for hindering salt rate, furthermore the nano junction of the micrometer structure of polytetrafluoroethylene fibre and polyimides
Structure constructs similar patellate and " receives micro- " super-drainage structure of two-phase, realizes the high hydrophobic property of the non-woven cloth.
(2) since the concave-convex non-woven cloth of prepared membrane distillation has convex-concave surface, rough surface degree is further improved,
The hydrophobic performance of concave-convex non-woven cloth is enhanced, to obtain super hydrophobic surface, so that fouling membrane degree is reduced, it can be in length
Stablize in time distillation process and keeps high-throughput；Meanwhile convex-concave surface reduces heat transfer coefficient, to be effectively reduced temperature
Throughput loss caused by polarization phenomena.
When above-mentioned two feature makes prepared membrane distillation high, long with flux height, resistance salt rate with concave-convex non-woven cloth
Between operational effect stablize the features such as, membrane distillation field have good application characteristic.
The present invention provides a kind of membrane distillation preparation methods of concave-convex non-woven cloth, efficiently to prepare high performance membrane distillation
A kind of new way is provided with non-woven cloth.
Detailed description of the invention
Fig. 1 is the schematic diagram for preparing the concave-convex non-woven cloth of membrane distillation.
Fig. 2 is the electron microscopic picture of the concave-convex non-woven cloth of membrane distillation.
Fig. 3 is the distribution diagram of element of the concave-convex non-woven cloth of membrane distillation.
Fig. 4 is the contact angle test figure of the concave-convex non-woven cloth of membrane distillation.
Fig. 5 is the stress-strain curve diagram piece of the concave-convex non-woven cloth of membrane distillation.
Fig. 6 is membrane distillation test process schematic diagram.
Specific embodiment
Below in conjunction with specific embodiment, the invention will be described in further detail.
Embodiment 1
The concave-convex non-woven cloth of membrane distillation is prepared first, is divided into three steps:
(1) preparation of precursor assorted fibre non-woven cloth: the ptfe emulsion for being 15: 1 by mass ratio
Boric acid solution (4wt%) blending and stirring of (60wt%) and poly-vinyl alcohol solution (10wt%) and 30 μ L/g polyvinyl alcohol is to uniform
After be made into polytetrafluoroethylene (PTFE)/polyvinyl alcohol spinning solution；By 4,4 '-diaminodiphenyl ethers and pyromellitic dianhydride with molar ratio for 1:
1 is dissolved in dimethylformamide, is configured to the polyamic acid spinning solution that mass fraction is 28wt%.Two kinds of spinning solutions are synchronized into electricity
Be spun into be made of micron order polytetrafluoroethylene (PTFE)/polyvinyl alcohol and nanoscale polyamic acid precursor assorted fibre it is non-woven
Cloth, specific electrospinning parameters are as follows: spinning voltage 28kV receives distance 18cm, polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber and poly-
The quality hybrid ratio of amic acid nanofiber is 2: 1, and polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber average diameter of acquisition is
0.9 μm, the average diameter of polyamic acid nanofiber is 153nm.
(2) heat treatment of precursor assorted fibre non-woven cloth: by the precursor assorted fibre non-woven cloth of preparation with
The speed of 0.5m/min is delivered in dual temperature area heat treatment drying chamber, and it is 300 that dual temperature area, which is heat-treated drying chamber the first warm area temperature range,
DEG C, the second warm area temperature range is 390 DEG C, and drying chamber length range is 30m, makes polytetrafluoroethylene (PTFE)/polyvinyl alcohol and polyamic acid
Precursor assorted fibre non-woven cloth is converted to micron order coarse structure polytetrafluoroethylene (PTFE) and nanoscale polyimides assorted fibre
The non-woven cloth of composition, and the average diameter of resulting polytetrafluoroethylene (PTFE) micrometer fibers is 1.2 μm；The polyimide acid is received
The average diameter of rice fiber is 171nm；
(3) the further provided for contouring processing of nonwoven fabric surface: the non-woven cloth after heat treatment is delivered in concave-convex shaped roller and is carried out
Concave-convex surfaceization processing, concave-convex shaped roller are made of the rubber lower roll of metal upper roller and smooth surface with salient point, are prepared described
The concave-convex non-woven cloth of membrane distillation；The membrane distillation is with concave-convex non-woven cloth with a thickness of 100 μm.
The schematic diagram of membrane distillation bumps non-woven cloth is as shown in Figure 1, the concave-convex non-woven cloth hole of above-mentioned obtained membrane distillation
Gap rate is up to 80.2%, strength 3.1MPa, and 150 ° of contact angle.It is used for membrane distillation, flux is up to 53.08L/m2H hinders salt
Rate > 99.99%, continuous and steady operation 12h have no the decline of membrane flux and hinder the decline of salt rate.
Embodiment 2
The concave-convex non-woven cloth of membrane distillation is prepared first, is divided into three steps:
(1) preparation of precursor assorted fibre non-woven cloth: the ptfe emulsion for being 15: 1 by mass ratio
Boric acid solution (4wt%) blending and stirring of (60wt%) and poly-vinyl alcohol solution (10wt%) and 30 μ L/g polyvinyl alcohol is to uniform
After be made into polytetrafluoroethylene (PTFE)/polyvinyl alcohol spinning solution；By 4,4 '-diaminodiphenyl ethers and pyromellitic dianhydride with molar ratio for 1:
1 is dissolved in dimethylformamide, is configured to the polyamic acid spinning solution that mass fraction is 28wt%.Two kinds of spinning solutions are synchronized into electricity
Be spun into be made of micron order polytetrafluoroethylene (PTFE)/polyvinyl alcohol and nanoscale polyamic acid precursor assorted fibre it is non-woven
Cloth, specific electrospinning parameters are as follows: spinning voltage 30kV receives distance 20cm, polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber and poly-
The quality hybrid ratio of amic acid nanofiber is 3: 1, and polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber average diameter of acquisition is
0.8 μm, the average diameter of polyamic acid nanofiber is 116nm.
(2) heat treatment of precursor assorted fibre non-woven cloth: by the precursor assorted fibre non-woven cloth of preparation with
The speed of 2.5m/min is delivered in dual temperature area heat treatment drying chamber, and it is 290 that dual temperature area, which is heat-treated drying chamber the first warm area temperature range,
DEG C, the second warm area temperature range is 380 DEG C, and drying chamber length range is 20m, makes polytetrafluoroethylene (PTFE)/polyvinyl alcohol and polyamic acid
Precursor assorted fibre non-woven cloth is converted to micron order coarse structure polytetrafluoroethylene (PTFE) and nanoscale polyimides assorted fibre
The non-woven cloth of composition, and the average diameter of resulting polytetrafluoroethylene (PTFE) micrometer fibers is 1.1 μm；The polyimide acid is received
The average diameter of rice fiber is 131nm；
(3) the further provided for contouring processing of nonwoven fabric surface: the non-woven cloth after heat treatment is delivered in concave-convex shaped roller and is carried out
Concave-convex surfaceization processing, concave-convex shaped roller are made of the rubber lower roll of metal upper roller and smooth surface with salient point, are prepared described
The concave-convex non-woven cloth of membrane distillation；The membrane distillation is with concave-convex non-woven cloth with a thickness of 70 μm.
The schematic diagram of membrane distillation bumps non-woven cloth is as shown in Figure 1, the concave-convex non-woven cloth hole of above-mentioned obtained membrane distillation
Gap rate is up to 83.6%, strength 2.8MPa, and 140 ° of contact angle.It is used for membrane distillation, flux is up to 27.48L/m2H hinders salt
Rate 98.2%.
Embodiment 3
The concave-convex non-woven cloth of membrane distillation is prepared first, is divided into three steps:
(1) preparation of precursor assorted fibre non-woven cloth: the ptfe emulsion for being 15: 1 by mass ratio
Boric acid solution (4wt%) blending and stirring of (60wt%) and poly-vinyl alcohol solution (10wt%) and 30 μ L/g polyvinyl alcohol is to uniform
After be made into polytetrafluoroethylene (PTFE)/polyvinyl alcohol spinning solution；By 4,4 '-diaminodiphenyl ethers and pyromellitic dianhydride with molar ratio for 1:
1 is dissolved in dimethylformamide, is configured to the polyamic acid spinning solution that mass fraction is 28wt%.Two kinds of spinning solutions are synchronized into electricity
Be spun into be made of micron order polytetrafluoroethylene (PTFE)/polyvinyl alcohol and nanoscale polyamic acid precursor assorted fibre it is non-woven
Cloth, specific electrospinning parameters are as follows: spinning voltage 25kV receives distance 16cm, polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber and poly-
The quality hybrid ratio of amic acid nanofiber is 1: 1, and polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber average diameter of acquisition is
1.1 μm, the average diameter of polyamic acid nanofiber is 252nm.
(2) heat treatment of precursor assorted fibre non-woven cloth: by the precursor assorted fibre non-woven cloth of preparation with
The speed of 1.0m/min is delivered in dual temperature area heat treatment drying chamber, and it is 310 that dual temperature area, which is heat-treated drying chamber the first warm area temperature range,
DEG C, the second warm area temperature range is 400 DEG C, and drying chamber length range is 40m, makes polytetrafluoroethylene (PTFE)/polyvinyl alcohol and polyamic acid
Precursor assorted fibre non-woven cloth is converted to micron order coarse structure polytetrafluoroethylene (PTFE) and nanoscale polyimides assorted fibre
The non-woven cloth of composition, and the average diameter of resulting polytetrafluoroethylene (PTFE) micrometer fibers is 1.3 μm；The polyimide acid is received
The average diameter of rice fiber is 283nm；
(3) the further provided for contouring processing of nonwoven fabric surface: the non-woven cloth after heat treatment is delivered in concave-convex shaped roller and is carried out
Concave-convex surfaceization processing, concave-convex shaped roller are made of the rubber lower roll of metal upper roller and smooth surface with salient point, are prepared described
The concave-convex non-woven cloth of membrane distillation；The membrane distillation is with concave-convex non-woven cloth with a thickness of 140 μm.
The schematic diagram of membrane distillation bumps non-woven cloth is as shown in Figure 1, the concave-convex non-woven cloth hole of above-mentioned obtained membrane distillation
Gap rate is up to 76.3%, strength 3.6MPa, and 125 ° of contact angle.It is used for membrane distillation, flux is up to 46.61L/m2H hinders salt
Rate > 99.99%, continuous operation 10h, the decline of membrane flux 32.3L/m2H, resistance salt rate fall to 99.3%.
Claims (3)
1. a kind of membrane distillation preparation method of concave-convex non-woven cloth, which comprises the following steps:
(1) preparation of precursor assorted fibre non-woven cloth: by ptfe emulsion, boric acid solution and poly-vinyl alcohol solution group
At spinning solution and 4, the synchronous electrospinning of the spinning solution that 4 '-diaminodiphenyl ethers, pyromellitic dianhydride and dimethylformamide form
Spinning is prepared and is mixed by micron order polytetrafluoroethylene (PTFE)/polyvinyl alcohol and nanoscale polyamic acid precursor on receiving lace curtaining
The non-woven cloth of fiber composition；
The polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber diameter range is 0.7-1.2 μm；The polyamic acid nanometer
The diameter range of fiber is 100-300nm；The polytetrafluoroethylene (PTFE)/polyvinyl alcohol micron fiber and polyamic acid nanofiber
Quality hybrid ratio be 3: 1-1: 3；
(2) heat treatment of precursor assorted fibre non-woven cloth: by the precursor assorted fibre non-woven cloth of preparation with a constant speed
Degree is delivered in dual temperature area heat treatment drying chamber, at a certain temperature by polytetrafluoroethylene (PTFE)/polyvinyl alcohol and polyamic acid precursor
Assorted fibre non-woven cloth be converted to micron order coarse structure polytetrafluoroethylene (PTFE) and nanoscale polyimides assorted fibre composition
Non-woven cloth；
The diameter range of the polytetrafluoroethylene (PTFE) micrometer fibers is 1.0-1.5 μm；The polyimide acid nanofiber
Diameter range is 120-350nm；The conveying is 0.5-2.5m/min；
(3) the further provided for contouring processing of nonwoven fabric surface: the non-woven cloth after heat treatment is delivered in concave-convex shaped roller and carries out surface
Further provided for contouring processing prepares the membrane distillation with concave-convex non-woven cloth；
The membrane distillation is with concave-convex non-woven cloth with a thickness of 60-150 μm.
2. the membrane distillation according to claim 1 preparation method of concave-convex non-woven cloth, it is characterised in that at the heat
Reason drying chamber is dual temperature area drying chamber, and the first warm area temperature range is 290-310 DEG C, and the second warm area temperature range is 380-400 DEG C, is dried
Room length range is 20-40m.
3. the membrane distillation according to claim 1 or 2 preparation method of concave-convex non-woven cloth, it is characterised in that described is recessed
Convex setting roll is made of the rubber lower roll of metal upper roller and smooth surface with salient point.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020246550A1 (en) * | 2019-06-06 | 2020-12-10 | 東洋紡株式会社 | Porous membrane for membrane distillation |
| CN114225121A (en) * | 2021-12-22 | 2022-03-25 | 无锡中科光远生物材料有限公司 | Endothelialization part absorbable anti-adhesion fibrous membrane and preparation method thereof |
| CN114635230A (en) * | 2022-04-02 | 2022-06-17 | 天津工业大学 | Bulk phase super-hydrophobic nanofiber membrane for membrane distillation and preparation method thereof |
| CN115275506A (en) * | 2022-07-05 | 2022-11-01 | 天津工业大学 | Electrostatic spinning PI @ PMIA nanofiber membrane for zinc ion battery and preparation method of membrane |
-
2018
- 2018-07-20 CN CN201810801518.3A patent/CN108993177A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020246550A1 (en) * | 2019-06-06 | 2020-12-10 | 東洋紡株式会社 | Porous membrane for membrane distillation |
| CN114225121A (en) * | 2021-12-22 | 2022-03-25 | 无锡中科光远生物材料有限公司 | Endothelialization part absorbable anti-adhesion fibrous membrane and preparation method thereof |
| CN114635230A (en) * | 2022-04-02 | 2022-06-17 | 天津工业大学 | Bulk phase super-hydrophobic nanofiber membrane for membrane distillation and preparation method thereof |
| CN114635230B (en) * | 2022-04-02 | 2024-03-26 | 天津工业大学 | Bulk super-hydrophobic nanofiber membrane for membrane distillation and preparation method thereof |
| CN115275506A (en) * | 2022-07-05 | 2022-11-01 | 天津工业大学 | Electrostatic spinning PI @ PMIA nanofiber membrane for zinc ion battery and preparation method of membrane |
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Application publication date: 20181214 |