CN109821425A - A kind of superhydrophilic superoleophobic metal mesh and preparation method thereof - Google Patents
A kind of superhydrophilic superoleophobic metal mesh and preparation method thereof Download PDFInfo
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- CN109821425A CN109821425A CN201910183412.6A CN201910183412A CN109821425A CN 109821425 A CN109821425 A CN 109821425A CN 201910183412 A CN201910183412 A CN 201910183412A CN 109821425 A CN109821425 A CN 109821425A
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- metal mesh
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- superhydrophilic superoleophobic
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- superhydrophilic
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- 239000002184 metal Substances 0.000 title claims abstract description 91
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000010410 layer Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 15
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 15
- 239000002344 surface layer Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 238000005530 etching Methods 0.000 claims description 8
- 230000004048 modification Effects 0.000 claims description 7
- 238000012986 modification Methods 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000003431 cross linking reagent Substances 0.000 claims description 6
- 235000019441 ethanol Nutrition 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims description 3
- YXYZMHGSOKYZAF-UHFFFAOYSA-M [Cl-].C(C(=C)C)(=O)OCC[N+](C(C)(C)C)(C)C Chemical compound [Cl-].C(C(=C)C)(=O)OCC[N+](C(C)(C)C)(C)C YXYZMHGSOKYZAF-UHFFFAOYSA-M 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- NQXWGWZJXJUMQB-UHFFFAOYSA-K iron trichloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].Cl[Fe+]Cl NQXWGWZJXJUMQB-UHFFFAOYSA-K 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000012528 membrane Substances 0.000 abstract description 15
- 230000004907 flux Effects 0.000 abstract description 9
- 230000008929 regeneration Effects 0.000 abstract description 9
- 238000011069 regeneration method Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 13
- 235000019198 oils Nutrition 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 235000019476 oil-water mixture Nutrition 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The invention discloses a kind of superhydrophilic superoleophobic metal meshes and preparation method thereof, wherein, superhydrophilic superoleophobic metal mesh includes metal mesh, metal mesh includes that the plane net of top layer is arranged in and is successively set below plane net four layers knit shape net, the outer surface of metal mesh is equipped with metal oxide layer, and the outer surface of metal oxide layer is attached with hydrophilic and oleophobic surface layer.The present invention, in the outer surface of metal mesh, metal oxide layer is set, hydrophilic and oleophobic surface layer is adhered in the outer surface of metal oxide layer, preparation process is simple, time-consuming short, at low cost, the superhydrophilic superoleophobic metal mesh separative efficiency of preparation is high, membrane flux is big, stain resistance is strong, has good chemical stability and mechanical stability, increases service life, have the advantages that simultaneously wider to the adaptability of water quality, one times of backwash and regeneration cycle stretch-out, membrane flux can restore 100% after backwash, and power of regeneration is good, film maintenance and replacement cost are reduced, economic serviceability is improved.
Description
Technical field
The present invention relates to metal technical field of membrane, and in particular to a kind of superhydrophilic superoleophobic metal mesh and preparation method thereof.
Background technique
Currently, most of oil field in China uses secondary oil recovery (or tertiary oil recovery) technique, generated after crude oil dehydration a large amount of
Oily waste water is usually passed through advanced treating, reached back by oil field waste to guarantee the continuous high yield of individual well and stable earth formation
Water is improved to increase stratum energy to underground re-injection and produces efficiency, while reducing pollution with high-pressure pump after infusing water supply standard,
Water resource is saved, and oiliness sewage treatment mainly uses floating method, bioanalysis, centrifugal separation and membrane processing method etc..
Wherein, for membrane processing method because with high-efficient, equipment is small, and consumption is few, easy to operate, it is easy to accomplish automation control
System is easy to the advantages that commercial scale uses, and more and more extensive use is obtained in oil field produced water process, and water outlet can be used as oil
Field reinjected water has huge social and economic benefits and good broad prospect of application.But membrane processing method in the prior art is used
The generally existing following defect of metal film:
(1) metal film contamination resistance is poor, and effluent quality cannot be met the requirements, and causes Membrane cleaning frequent, film power of regeneration
Difference causes film process higher operating costs;
(2) extension in use at any time, membrane flux gradually decrease, and water yield constantly reduces, metal film replacement
Frequently, increase cost;
(3) manufacturing process is complex, the time is long, at high cost, and obtained metal membrane stability is poor.
In view of this, be badly in need of existing metal film and its manufacturing method are improved, simplify manufacturing process, reduce at
This, the good metal film of stability can be obtained, while increasing the antipollution and film power of regeneration of metal film, reduce film maintenance and
Replacement cost improves economic serviceability.
Summary of the invention
The technical problem to be solved by the present invention is to existing metal film and its manufacturing method, that there are manufacturing processes is more multiple
Miscellaneous, at high cost, the antipollution and film power of regeneration of obtained metal membrane stability difference and metal film are poor, film maintenance and more
Change this higher problem into.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that providing a kind of superhydrophilic superoleophobic metal
Net, the metal mesh include that the plane net of top layer is arranged in and is successively set below the plane net four layers knit shape net,
The outer surface of the metal mesh is equipped with metal oxide layer, and the outer surface of the metal oxide layer is attached with hydrophilic and oleophobic table
Layer.
In the above scheme, shape net is knitted described in every layer to be made of two rows of wavy steel wires and row's straight wire, it is two rows of
The wavy steel wire staggered relative setting, makes its middle part form the gap being inserted into for straight wire.
In the above scheme, the metal mesh uses stainless steel material.
In the above scheme, the aperture of the metal mesh is greater than or equal to 5 μm.
The present invention also provides a kind of preparation methods of superhydrophilic superoleophobic metal mesh, comprising the following steps:
Metal mesh is cleaned by ultrasonic, removes after surface is organic and inorganic pollution and dries;
Weigh a certain amount of FeCl3.6H2O is added deionized water dissolving, sequentially adds strong acid, H2O2, it is configured to etch
Liquid;
A certain amount of ethyl alcohol, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride solution, crosslinking agent and photoinitiator is weighed to match
It is set to modification liquid;
The metal mesh of drying is invaded in configured etching liquid, is taken out after impregnating 1~10min, is cleaned, drying;
Metal mesh after etching is immersed in configured modification liquid, takes out drying after impregnating 1~10min;
Metal mesh after modified drying is placed into illumination in the UV lamp and for a period of time, obtains superhydrophilic superoleophobic metal
Net.
In the above scheme, the metal mesh successively uses deionized water, acetone, ethyl alcohol, deionized water to carry out ultrasound clearly
It washes.
In the above scheme, the crosslinking agent uses trimethylolpropane trimethacrylate.
In the above scheme, the photoinitiator uses -2 propyl propiophenone of 2- hydroxyl.
Compared with prior art, metal oxide layer is arranged in the outer surface of metal mesh in the present invention, metal oxide layer
Hydrophilic and oleophobic surface layer is adhered in outer surface, and preparation process is simple, time-consuming short, at low cost, the superhydrophilic superoleophobic metal mesh point of preparation
From high-efficient, membrane flux is big, and stain resistance is strong, has good chemical stability and mechanical stability, increases service life, together
When, has the advantages that wider to the adaptability of water quality, and one times of backwash and regeneration cycle stretch-out, membrane flux can restore 100% after backwash,
Power of regeneration is good, reduces film maintenance and replacement cost, improves economic serviceability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of metal mesh of the invention;
Fig. 2 is the structural schematic diagram of superhydrophilic superoleophobic metal mesh of the invention;
Fig. 3 is that the SEM of unmodified preceding metal net surface schemes;
Fig. 4 is the schematic diagram of the contact angle of unmodified preceding metal mesh and water;
Fig. 5 is the SEM figure after metal mesh surface etch of the invention;
Fig. 6 is that the SEM of superhydrophilic superoleophobic metal net surface of the invention schemes.
Specific embodiment
The present invention provides a kind of superhydrophilic superoleophobic metal meshes and preparation method thereof, and preparation process is simple, time-consuming short, at
This is low, and the superhydrophilic superoleophobic metal mesh separative efficiency of preparation is high, and membrane flux is big, and stain resistance is strong, has good chemistry steady
Qualitative and mechanical stability increases service life, while having the advantages that wider to the adaptability of water quality.Below with reference to specification
The drawings and specific embodiments are described in detail the present invention.
As depicted in figs. 1 and 2, a kind of superhydrophilic superoleophobic metal mesh provided by the invention, metal mesh 10 include that setting exists
The plane net of top layer and be successively set below plane net four layers knit shape net, and the outer surface of metal mesh 10 is aoxidized equipped with metal
Nitride layer 20, the outer surface of metal oxide layer 20 are attached with hydrophilic and oleophobic surface layer 30.
Ground is advanced optimized, as shown in Figure 1, every layer is knitted shape net by two rows of wavy steel wires and row's straight wire group
At two rows of wavy steel wire staggered relative settings make its middle part form the gap being inserted into for straight wire.
The present invention can form metal oxide layer 20 on the surface of metal mesh 10 by oxidizing process, and metal oxide is received
Rice coarse structure surface energy with higher, hydrophilic and oleophobic characteristic is presented in the infiltration of the surface water electrode Yi Qi, under the state, water
Can be by nethike embrane, and oils cannot be by the nethike embrane, to realize the water-oil separating of oil water mixture.In order to increase metal mesh
Metal mesh 10 after oxidation can be immersed in modification liquid by 10 hydrophilic and oleophobic characteristic, make its periphery attachment hydroaropic substance simultaneously
Hydrophilic and oleophobic surface layer 30 is formed, hydrophilic and oleophobic effect is further increased.
The present invention, 10 separative efficiency of superhydrophilic superoleophobic metal mesh is high, and membrane flux is big, and stain resistance is strong, has good
Chemical stability and mechanical stability increase service life, while having the advantages that, backwash and regeneration wider to the adaptability of water quality
One times of cycle stretch-out, membrane flux can restore 100% after backwash, and power of regeneration is good, reduce film maintenance and replacement cost, improve economical
Applicability.
As shown in Figure 1, metal mesh 10 of the invention belongs to five layered networks of standard, it is a kind of by five layers of stainless steel cloth
It is stacked together in order, by a kind of novel filter material made of vacuum-sintering, this kind of design method makes plane net form
At protective layer 11, knits shape net for four layers and be from top to bottom respectively formed filter layer 12, dispersion layer 13, support rib rack-layer 14 and casing play
15。
This kind of metal mesh 10 has the advantage that
(1) there is high mechanical strength and compressive resistance, processing, welding are good with assembling property, easy to use;
(2) filter layer 12 makes it obtain good protection and shunting in the second layer, and filtering accuracy can reach uniform one
The strainability of cause guarantees it with high stability;
(3) 316L material is selected, good corrosion resistance is heat-resist, can be used for -200 DEG C~480 DEG C of temperature and soda acid ring
The filtering in border, use scope are wide;
(4) the both surface filtration structure of splendid backwash effect, so backwash effect is good, can Reusability, the longevity
Life length.
Ground is advanced optimized, metal mesh 10 uses stainless steel material, and the aperture of metal mesh 10 is greater than or equal to 5 μm.
The present invention also provides a kind of preparation methods of superhydrophilic superoleophobic metal mesh 10, comprising the following steps:
Metal mesh 10 is cleaned by ultrasonic by step 1, removes after surface is organic and inorganic pollution and dries;Specifically,
Metal mesh 10 is successively cleaned by ultrasonic using deionized water, acetone, ethyl alcohol, deionized water.
Step 2 weighs a certain amount of FeCl3.6H2O is added deionized water dissolving, sequentially adds strong acid, H2O2, configuration
At etching liquid.
Step 3 weighs a certain amount of ethyl alcohol, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride solution, crosslinking agent and light and draws
Hair agent is configured to modification liquid, obtains hydroaropic substance.Specifically, crosslinking agent uses trimethylolpropane trimethacrylate, and light draws
It sends out agent and uses -2 propyl propiophenone of 2- hydroxyl.
Step 4, as shown in figure 5, the metal mesh 10 of drying is invaded in configured etching liquid, after impregnating 1~10min
It takes out, cleans, drying;During being somebody's turn to do, so that the surface of metal mesh 10 forms metal oxide layer 20, due to metal oxide
So that the surface water electrode Yi Qi infiltrates hydrophilic and oleophobic characteristic is presented, the state in nanometer coarse structure surface energy with higher
Under, water can be by nethike embrane, and oils cannot be by the nethike embrane, to realize the water-oil separating of oil water mixture.
Step 5 impregnates 1~10min as shown in fig. 6, the metal mesh 10 after etching is immersed in configured modification liquid
Drying is taken out afterwards;During being somebody's turn to do, so that the surface of metal mesh 10 forms hydrophilic and oleophobic surface layer 30, the hydrophilic of metal mesh 10 is increased
Oleophobic property.
Metal mesh 10 after modified drying is placed illumination in the UV lamp for a period of time by step 6, is obtained super hydrophilic super
Oleophobic metal mesh 10 can increase the stability of metal mesh 10 using the cured mode of ultraviolet light, and it is steady to make it have good chemistry
Qualitative and mechanical stability increases service life.
As shown in figure 3, common metal net surface adheres to more water, it can be seen that the hydrophilic and oleophobic characteristic of this kind of metal mesh
It is poor, it is unfavorable for the separation of grease, water rate and effluent quality cannot be met the requirements.As shown in figure 4, metal mesh connects water
Feeler is about 94 °, is unfavorable for water across metal mesh, reduces water rate.
The present invention can prepare superhydrophilic superoleophobic metal mesh 10 by simple oxidation reaction and cross-linking reaction, have system
Standby process is simple, time-consuming short, at low cost advantage.As shown in Figure 5 and Figure 6, the superhydrophilic superoleophobic metal nethike embrane being prepared
Flux is big, and surface with higher energy, and hydrophilic and oleophobic characteristic is presented, and under the state, water can in the infiltration of the surface water electrode Yi Qi
To pass through nethike embrane, and oils cannot increase the hydrophilic of metal mesh by the nethike embrane, to realize the water-oil separating of oil water mixture
Fuel shedding quality, increase water-oil separating efficiency is higher, meets the requirement of effluent quality.
The invention is not limited to above-mentioned preferred forms, and anyone should learn that is made under the inspiration of the present invention
Structure change, the technical schemes that are same or similar to the present invention are fallen within the scope of protection of the present invention.
Claims (8)
1. a kind of superhydrophilic superoleophobic metal mesh, which is characterized in that the metal mesh include be arranged in top layer plane net and
It is successively set on four below the plane net layers and knits shape net, the outer surface of the metal mesh is equipped with metal oxide layer, described
The outer surface of metal oxide layer is attached with hydrophilic and oleophobic surface layer.
2. a kind of superhydrophilic superoleophobic metal mesh according to claim 1, which is characterized in that knitted described in every layer shape net by
Two rows of wavy steel wires and row's straight wire composition, two rows of wavy steel wire staggered relative settings, form its middle part
For the gap of straight wire insertion.
3. a kind of superhydrophilic superoleophobic metal mesh according to claim 1, which is characterized in that the metal mesh is using stainless
Steel material.
4. a kind of superhydrophilic superoleophobic metal mesh according to claim 1, which is characterized in that the aperture of the metal mesh is big
In or equal to 5 μm.
5. a kind of preparation method of superhydrophilic superoleophobic metal mesh, which comprises the following steps:
Metal mesh is cleaned by ultrasonic, removes after surface is organic and inorganic pollution and dries;
Weigh a certain amount of FeCl3.6H2O is added deionized water dissolving, sequentially adds strong acid, H2O2, it is configured to etching liquid;
A certain amount of ethyl alcohol, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride solution, crosslinking agent and photoinitiator is weighed to be configured to
Modification liquid;
The metal mesh of drying is invaded in configured etching liquid, is taken out after impregnating 1~10min, is cleaned, drying;
Metal mesh after etching is immersed in configured modification liquid, takes out drying after impregnating 1~10min;
Metal mesh after modified drying is placed into illumination in the UV lamp and for a period of time, obtains superhydrophilic superoleophobic metal mesh.
6. a kind of preparation method of superhydrophilic superoleophobic metal mesh according to claim 5, which is characterized in that the metal
Net successively uses deionized water, acetone, ethyl alcohol, deionized water to be cleaned by ultrasonic.
7. a kind of preparation method of superhydrophilic superoleophobic metal mesh according to claim 5, which is characterized in that the crosslinking
Agent uses trimethylolpropane trimethacrylate.
8. a kind of preparation method of superhydrophilic superoleophobic metal mesh according to claim 5, which is characterized in that the light draws
It sends out agent and uses -2 propyl propiophenone of 2- hydroxyl.
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Cited By (2)
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CN111228894A (en) * | 2020-03-11 | 2020-06-05 | 金碳环境科技(天津)有限公司 | Metal net for water treatment |
CN114377435A (en) * | 2022-01-18 | 2022-04-22 | 中国石油大学(华东) | Preparation method of super-durable oil-water separation net |
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US20130264287A1 (en) * | 2011-09-28 | 2013-10-10 | Lianbin Zhang | Grafted membranes and substrates having surfaces with switchable superoleophilicity and superoleophobicity and applications thereof |
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US20130264287A1 (en) * | 2011-09-28 | 2013-10-10 | Lianbin Zhang | Grafted membranes and substrates having surfaces with switchable superoleophilicity and superoleophobicity and applications thereof |
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CN105268326A (en) * | 2015-09-30 | 2016-01-27 | 西南交通大学 | Preparation of oil-water separation mesh membrane and surface wettability conversion method thereof |
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CN111228894A (en) * | 2020-03-11 | 2020-06-05 | 金碳环境科技(天津)有限公司 | Metal net for water treatment |
CN114377435A (en) * | 2022-01-18 | 2022-04-22 | 中国石油大学(华东) | Preparation method of super-durable oil-water separation net |
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