CN109457391A - A kind of PcH/ZIF nano fibrous membrane and preparation method thereof - Google Patents
A kind of PcH/ZIF nano fibrous membrane and preparation method thereof Download PDFInfo
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4318—Fluorine series
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/435—Polyesters
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
Abstract
The Static Spinning PcH/ZIF nano fibrous membrane and preparation method thereof that the invention discloses a kind of for membrane distillation.The preparation method is that: ZIF-71 nano particle is added in solvent, ultrasound makes it be uniformly dispersed, and then weighs PcH polymer and is dissolved in the mixed liquor, after magnetic agitation, by spinning solution standing and defoaming, for use；Spinning solution is subjected to electrostatic spinning, electrostatic nanofibers are received with PEF non-woven fabrics, to obtain PcH/ZIF nano fibrous membrane of the PEF non-woven fabrics as supporting layer；Nano fibrous membrane is removed from collector, after vacuum drying, hot-pressing processing is carried out, obtains Static Spinning PcH/ZIF nano fibrous membrane.Static Spinning PcH/ZIF nano fibrous membrane provided by the invention is greater than 99.99% for salt-stopping rate in membrane distillation, and has preferable mechanical performance and anti-wettability energy, improves vapour permeability, greatly reduces the risk of fouling membrane.
Description
Technical field
The present invention relates to a kind of preparation methods of Static Spinning PcH/ZIF nano fibrous membrane for membrane distillation, belong to film steaming
Evaporate technical field.
Background technique
Membrane distillation is a kind of emerging thermal drivers isolation technics, and (such as reverse osmosis, ultrafiltration is received with traditional membrane separation technique
Filter etc.) it compares, it has the advantages that small rectifying device, low operation temperature, salt rejection rate are high, hydraulic pressure is low etc., causes researcher
Extensive concern.Electrostatic spinning is a kind of simple direct membrane preparation method, by being forced under high voltage electric field by spinning head
Polymer solution produces nano fibrous membrane.The highly porous film with controllable bore diameter can be manufactured by electrostatic spinning.It is usually used in
The polymer of Static Spinning has polypropylene (PP), polyethylene (PE), Kynoar (PVDF).The chemical stabilization of these three polymer
Property is pretty good, but thermal stability is general.And polyvinylidene fluoride be total to hexafluoropropene (following shorthand PcH) have both thermal stability it is good and
Chemical property stablizes two kinds of advantages and solvent resistance is strong, and processing performance is good, is a kind of basis material of excellent composite material.
Meanwhile PcH is semi-crystalline thermoplastic polymer, containing a variety of crystal phases such as α, β, γ, often promotes α opposite by control film-forming process
β phase transition promotes dielectric material performance.Film is made in PcH, and the reaction film that can be used as membrane separation technique is applied to sea water desalination, pure
Water preparation, the separating-purifying of chemical industry and environmental protection etc..However, static spinning membrane is usually more fluffy, cause weaker
Mechanical performance and poor film properties.Therefore, hot pressing post-processing is particularly important.Some researches show that hot pressing can improve film
Mechanical and physical property, to improve the stability of film.After hot pressing, the fenestra wetting phenomena of film is reduced, and permeation flux increases.
Metal-organic framework (MOFs) is a kind of emerging hybridized nanometer porous material.MOFs is by by organic linking
Object and metallic molecule are assembled into what crystallization bracket was formed, have high specific surface area and hole in the crystalline material of report
Rate.Their aperture, porosity, crystalline size and pattern can be by selecting suitable organic crosslinking agent and metal cluster to be fitted
When adjustment, and by auxiliary synthesize or coordination modulation etc. multiple technologies be controlled.Therefore, MOFs is widely regarded as separating
With catalysis etc. multi-purpose materials, wherein ZIF-71 is most typical hydrophobicity MOFs material in MOFs, can be used for adjusting film
Hydrophilicity and hydrophobicity.
Summary of the invention
The technical problems to be solved by the present invention are: by Static Spinning ZIF-71 and polymer, in non-woven backing material
On prepare a kind of novel nanofiber membrane distillation film, to improve the hydrophobicity and mechanical strength of film.
To solve the above-mentioned problems, the technical solution of the present invention is to provide a kind of Static Spinning PcH/ZIF for membrane distillation
The preparation method of nano fibrous membrane, which comprises the following steps:
Step 1): ZIF-71 nano particle is added in solvent, and ultrasound makes it be uniformly dispersed, and then weighs PcH polymerization
Object is dissolved in the mixed liquor, after magnetic agitation, by spinning solution standing and defoaming, for use；
Step 2): pouring into syringe for spinning solution, carries out electrostatic spinning under high pressure effect, is received with PEF non-woven fabrics quiet
Conducting nanofiber silk, to obtain PcH/ZIF nano fibrous membrane of the PEF non-woven fabrics as supporting layer；
Step 3): nano fibrous membrane is removed from collector, after vacuum drying, is carried out hot-pressing processing, is obtained Static Spinning
PcH/ZIF nano fibrous membrane.
Preferably, the mass concentration in the step 1) in ZIF solvent is the matter of 0.25~0.75%, PcH in a solvent
Measuring concentration is 18~25%；The solvent is the mixture of n,N-Dimethylformamide and acetone.
It is highly preferred that the n,N-Dimethylformamide and the volume ratio of acetone are (7:3)~(9:1).
Preferably, the time of standing and defoaming is 0.5~2 hour in the step 1), and temperature is 30~60 DEG C.
Preferably, the syringe needle internal diameter of syringe is 0.5~1mm in the step 2), and 0.5~1.5mL/h of charging rate is applied
Making alive is 15-25kV, and collector revolving speed is 200~400r/min, the distance between injection needle and collector for 15~
20cm；Controlled at 20~30 DEG C, humidity 2045%RH during the electrostatic spinning, spinning head during electrostatic spinning
It is moved back and forth horizontally along slide unit, movement speed is 1~2cm/s.
Preferably, vacuum drying temperature is 60~80 DEG C in the step 3), and the time is 8~12 hours；The hot pressing
The pressure of processing is 0.2~0.4kPa, and hot pressing temperature is 140~180 DEG C, and hot pressing time is 2~4 hours.
The present invention also provides a kind of preparation method systems of above-mentioned Static Spinning PcH/ZIF nano fibrous membrane for membrane distillation
Standby Static Spinning PcH/ZIF nano fibrous membrane.
Mixed substrate membrane containing nano-grade molecular sieve of the inventive film based on ZIF and PcH, the advantages of having both ZIF film and PcH film, have preferable point
From and mechanical performance.It is used for the Static Spinning PcH/ZIF nano fibrous membrane of membrane distillation in the present invention, passes through the doping and hot pressing of ZIF
Post-processing, can be effectively improved the mechanical performance and anti-wettability energy of electrostatic spinning nano fiber film, and since ZIF is in tunica fibrosa
Presence, improve the interaction of water-film between the two, effectively facilitated vapour permeability, the infiltration for substantially increasing film is logical
A possibility that measuring, while also effectivelying prevent Liquid Penetrant into fenestra, greatly reducing fouling membrane.
Static Spinning PcH/ZIF nano fibrous membrane provided by the invention is greater than 99.99% for salt-stopping rate in membrane distillation, and has
There are preferable mechanical performance and anti-wettability energy, improve vapour permeability, greatly reduces the risk of fouling membrane.
Detailed description of the invention
Fig. 1 is the SEM photograph (a) of 1 gained ZIF-71 material of embodiment and the film of electrostatic spinning PcH/ZIF nano fibrous membrane
The comparison diagram of surface SEM photograph (b)；
Fig. 2 is the XRD characterization figure of membrane material prepared by additive amount 0.5wt%ZIF-71 in embodiment 1；
Fig. 3 is influence of the ZIF-71 additive amount to permeation flux and penetrating fluid conductivity in embodiment 1；
Fig. 4 is the permeation flux of PcH/ZIF film and to cut under different material liquid concentration (35,70g/L NaCl) in embodiment 2
Salt rate；
Fig. 5 is the permeation flux of PcH/ZIF nano fibrous membrane under stimulated dye wastewater in embodiment 3.
Specific embodiment
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.
Embodiment 1
(1) 0.25,0.5,0.75wt%ZIF-71 nano particle preparation of spinning solution: are added to the mixed liquor of DMF and acetone
(DMF: acetone=8:2), ultrasound makes ZIF-71 be uniformly dispersed, and then weighs 20wt%PcH polymer and is dissolved in above-mentioned mixed liquor, sets
In on magnetic stirring apparatus, at 60 DEG C, 6h is stirred under conditions of 1400r/min, after the completion of stirring, by spinning solution standing and defoaming, to
With.(while preparing the PcH spinning solution that ZIF-71 is not added, deaeration is stand-by).
(2) preparation of Static Spinning PcH/ZIF nano fibrous membrane: pouring into the asepsis injector that specification is 10mL for spinning solution,
Electrostatic spinning, syringe needle internal diameter 0.7mm are carried out using flat mouth syringe needle, asepsis injector is connect by disposable plastic connecting tube and Rule
First end connection, flat mouth syringe needle connect with the female Luer other end and are placed on slide unit, and syringe is installed to micro-injection
On pump, under the high pressure of 20kV, the charging rate for controlling spinning solution is 1mL/h, roller rotation rate 300r/min, roller bearing and syringe
The distance between syringe needle 15cm, temperature and humidity are controlled respectively in 25 DEG C and 30%RH.Meanwhile one layer of PET is wrapped up on roller bearing
Non-woven fabrics is 1cm/s by adjusting the movement speed of slide unit, can be made and be supported by PET non-woven fabrics as electrostatic spinning receiver
The PcH/ZIF nano fibrous membrane of layer carrying.
(3) hot pressing post-processes: after static spinning membrane is successfully prepared, PcH/ZIF nano fibrous membrane being put in 60 DEG C first
Baking oven 12h then carries out hot-pressing processing to film to improve its mechanical performance.Membrane sample is laid in the iron that pressure is 0.297kPa
It between plate, then places it in baking oven, hot pressing 2h at a temperature of 140 DEG C, takes out stand-by.
(4) MD performance test: direct contact membrane distillation (DCMD) device to test Different adding amount system of laboratory scale
The performance of the PcH/ZIF nano fibrous membrane obtained, material liquid are the NaCl solution of 35g/L, and temperature maintains 60 ± 1 DEG C；Penetrating fluid
For deionized water, temperature maintains 20 ± 1 DEG C, and the rate of circulating flow of material liquid and penetrating fluid is set as 400mL/min.
It is the pattern and performance characterization of PcH/CNT nano fibrous membrane below:
(1) pattern:
Field emission scanning electron microscope (SEM, Hitachi, Japan S-4700) characterizes nanofiber environmental microbes.Before test
Sample is through 140 DEG C of processing 2h of hot pressing.
(2) the MD performance characterization of PcH/ZIF nano fibrous membrane:
The permeation flux J of Static Spinning PcH/ZIF filmw[L/(m2H)], the calculation formula of salt-stopping rate Rs (%) is respectively such as formula
(1) shown in.
In formula (1), Δ V is penetrating fluid volume incrementss, unit: L；AmFor effective membrane area, unit: m2；Δ t is the time
Interval, unit: h.
From Figure 2 it can be seen that the XRD characterization data of comparison tri- kinds of materials of PcH, ZIF-71 and 0.5wt%ZIF/PcH, provable
The successful synthesis of 0.5wt%ZIF/PcH material.
As seen from Figure 3, the Electrospun nano-fibers of Different adding amount ZIF material preparation are loaded onto respectively in membrane module
Film carries out nanofiber film properties test through distillation device, and discovery is added the preparation-obtained PcH/ZIF of ZIF-71 material and receives
The permeation flux of rice tunica fibrosa is much higher than PcH nano fibrous membrane, and conductivity is also sufficiently stable.And it can be found that additive amount is
The performance of the nano fibrous membrane of 0.5wt%ZIF preparation is best.
Embodiment 2
(1) 0.25,0.5,0.75wt%ZIF-71 nano particle preparation of spinning solution: are added to the mixed liquor of DMF and acetone
(DMF: acetone=8:2), ultrasound makes ZIF-71 be uniformly dispersed, and then weighs 20wt%PcH polymer and is dissolved in above-mentioned mixed liquor, sets
In on magnetic stirring apparatus, at 60 DEG C, 6h is stirred under conditions of 1400r/min, after the completion of stirring, by spinning solution standing and defoaming, to
With.
(2) preparation of Static Spinning PcH/ZIF nano fibrous membrane: pouring into the asepsis injector that specification is 10mL for spinning solution,
Electrostatic spinning, syringe needle internal diameter 0.7mm are carried out using flat mouth syringe needle, asepsis injector is connect by disposable plastic connecting tube and Rule
First end connection, flat mouth syringe needle connect with the female Luer other end and are placed on slide unit, and syringe is installed to micro-injection
On pump, under the high pressure of 20kV, the charging rate for controlling spinning solution is 1mL/h, roller rotation rate 300r/min, roller bearing and syringe
The distance between syringe needle 15cm, temperature and humidity are controlled respectively in 25 DEG C and 30%RH.Meanwhile one layer of PET is wrapped up on roller bearing
Non-woven fabrics is 1cm/s by adjusting the movement speed of slide unit, can be made and be supported by PET non-woven fabrics as electrostatic spinning receiver
The PcH/ZIF nano fibrous membrane of layer carrying.
(3) hot pressing post-processes: after static spinning membrane is successfully prepared, PcH/ZIF nano fibrous membrane being put in 60 DEG C first
Baking oven 12h then carries out hot-pressing processing to film to improve its mechanical performance.Membrane sample is laid in the iron that pressure is 0.297kPa
It between plate, then places it in baking oven, hot pressing 2h at a temperature of 140 DEG C, takes out stand-by.
(4) MD performance test: direct contact membrane distillation (DCMD) device of laboratory scale is tested respectively does not have to addition
Measure performance of the PcH/ZIF nano fibrous membrane under different material liquid concentration of preparation, NaCl solution that material liquid is 35g/L and
The NaCl solution of 70g/L, temperature maintain 60 ± 1 DEG C；Penetrating fluid is deionized water, and temperature maintains 20 ± 1 DEG C, and material liquid
400mL/min is set as with the rate of circulating flow of penetrating fluid.
Embodiment result is shown in Fig. 4.
Embodiment 3
(1) preparation of spinning solution: by 0.5wt%ZIF-71 nano particle be added DMF and acetone mixed liquor (DMF: acetone=
8:2), ultrasound makes ZIF-71 be uniformly dispersed, and then weighs 20wt%PcH polymer and is dissolved in above-mentioned mixed liquor, is placed in magnetic agitation
On device, at 60 DEG C, 6h is stirred under conditions of 1400r/min, after the completion of stirring, by spinning solution standing and defoaming, for use.
(2) preparation of Static Spinning PcH/ZIF nano fibrous membrane: pouring into the asepsis injector that specification is 10mL for spinning solution,
Electrostatic spinning, syringe needle internal diameter 0.7mm are carried out using flat mouth syringe needle, asepsis injector is connect by disposable plastic connecting tube and Rule
First end connection, flat mouth syringe needle connect with the female Luer other end and are placed on slide unit, and syringe is installed to micro-injection
On pump, under the high pressure of 20kV, the charging rate for controlling spinning solution is 1mL/h, roller rotation rate 300r/min, roller bearing and syringe
The distance between syringe needle 15cm, temperature and humidity are controlled respectively in 25 DEG C and 30%RH.Meanwhile one layer of PET is wrapped up on roller bearing
Non-woven fabrics is 1cm/s by adjusting the movement speed of slide unit, can be made and be supported by PET non-woven fabrics as electrostatic spinning receiver
The PcH/ZIF nano fibrous membrane of layer carrying.
(3) hot pressing post-processes: after static spinning membrane is successfully prepared, PcH/ZIF nano fibrous membrane being put in 60 DEG C first
Baking oven 12h then carries out hot-pressing processing to film to improve its mechanical performance.Membrane sample is laid in the iron that pressure is 0.297kPa
It between plate, then places it in baking oven, hot pressing 2h at a temperature of 140 DEG C, takes out stand-by.
(4) MD performance test: direct contact membrane distillation (DCMD) device of laboratory scale test respectively commercial membranes and
The performance of PcH/ZIF nano fibrous membrane, material liquid are stimulated dye wastewater, and temperature maintains 60 ± 1 DEG C；Penetrating fluid is deionization
Water, temperature maintain 20 ± 1 DEG C, and the rate of circulating flow of material liquid and penetrating fluid is set as 400mL/min.
Embodiment result is shown in Fig. 5.
Claims (7)
1. a kind of preparation method of PcH/ZIF nano fibrous membrane, which comprises the following steps:
Step 1): ZIF-71 nano particle is added in solvent, and ultrasound makes it be uniformly dispersed, and it is molten then to weigh PcH polymer
In the mixed liquor, after magnetic agitation, by spinning solution standing and defoaming, for use；
Step 2): pouring into syringe for spinning solution, carries out electrostatic spinning under high pressure effect, receives electrostatic with PEF non-woven fabrics and receives
Rice fiber filament, to obtain PcH/ZIF nano fibrous membrane of the PEF non-woven fabrics as supporting layer；
Step 3): nano fibrous membrane is removed from collector, after vacuum drying, is carried out hot-pressing processing, is obtained Static Spinning PcH/
ZIF nano fibrous membrane.
2. the preparation method of PcH/ZIF nano fibrous membrane as described in claim 1, which is characterized in that ZIF in the step 1)
Mass concentration in a solvent is that the mass concentration of 0.25~0.75%, PcH in a solvent is 18~25%；The solvent is N,
The mixture of dinethylformamide and acetone.
3. the preparation method of PcH/ZIF nano fibrous membrane as claimed in claim 2, which is characterized in that the N, N- dimethyl
The volume ratio of formamide and acetone is (7:3)~(9:1).
4. the preparation method of PcH/ZIF nano fibrous membrane as described in claim 1, which is characterized in that quiet in the step 1)
The time for setting deaeration is 0.5~2 hour, and temperature is 30~60 DEG C.
5. the preparation method of PcH/ZIF nano fibrous membrane as described in claim 1, which is characterized in that note in the step 2)
The syringe needle internal diameter of emitter is 0.5~1mm, and 0.5~1.5mL/h of charging rate, application voltage is 15-25kV, and collector revolving speed is
200~400r/min, the distance between injection needle and collector are 15~20cm；Temperature is controlled during the electrostatic spinning
It is 20~30 DEG C, humidity 2045%RH, spinning head moves back and forth horizontally along slide unit during electrostatic spinning, movement speed 1
~2cm/s.
6. the preparation method of PcH/ZIF nano fibrous membrane as described in claim 1, which is characterized in that true in the step 3)
The dry temperature of sky is 60~80 DEG C, and the time is 8~12 hours；The pressure of the hot-pressing processing is 0.2~0.4kPa, hot pressing temperature
Degree is 140~180 DEG C, and hot pressing time is 2~4 hours.
7. Static Spinning prepared by a kind of preparation method of PcH/ZIF nano fibrous membrane as claimed in any one of claims 1 to 6
PcH/ZIF nano fibrous membrane.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111589229A (en) * | 2020-06-05 | 2020-08-28 | 天津工业大学 | Composite air filter material capable of being washed repeatedly and preparation method thereof |
| CN112604515A (en) * | 2020-11-30 | 2021-04-06 | 常州工程职业技术学院 | Zn-Co-MOF/PVDF nanofiltration membrane, preparation method and application |
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