A kind of wellability miillpore filter and the preparation method and application thereof for water-oil separating
Technical field
The invention belongs to polymer material science fields, and in particular to a kind of wellability miillpore filter for water-oil separating
And the preparation method and application thereof.
Background technique
Frequent Accidents relevant to petroleum in recent years, such as Fergana paddy oil spill accident, Gulf of Mexico oil spill accident and
Millions of tons crude oil leakage is entered river and ocean by the more oil spill accidents such as long celebrating oil spill events, forms oil-in-water or Water-In-Oil
Emulsion, and gradually become serious environmental problem.Also comprising a large amount of cream in the oily wastewater of industry and daily life discharge
Shape liquid oil water mixture.Effectively to contain oily pollution, it must be carried out before discharge oil water mixture and oil hydrosol
It efficiently separates.And in traffic and transport field, the water being dispersed in fuel oil on a small quantity will form water-in-oil emulsion, serious quick-fried to avoid
Fried accident, it is also very necessary to remove minor amount of water.
Currently, sump oil processing method both domestic and external has electric field treatment method, thermochemical treatment method, microwave treatment method, ultrasonic wave
Demulsification method, special wellability material sieve method etc..Wherein, the material of super-hydrophobic super-oleophylic is higher than due to surface water contact angle
It 150 °, to oily contact angle less than 5 ° and surface has single-minded selectivity close to super-hydrophobic, therefore to oil/water under oil, can cut
It stays water and passes through oil, to realize the separation of oil/water mixture.Such as metal mesh, fabric, sponge, the porous materials such as filter paper
It may modify into super-hydrophobic super-oleophylic material and be used for oil-water separation mixture, but these materials most apertures are larger, and lotion
Size is generally tens microns or lower, therefore cannot be used for separation emulsion form oil water mixture.And membrane material blanking aperture on the market
It is ideal substrate generally between 0.2 μm to 5 μm.If porous membrane substrate can be modified to special wellability membrane material
Be used for oil-water separation lotion afterwards, will be a kind of high efficiency, low energy consumption, low cost, environmentally protective separation method, to ecology and
Real life has great importance.
Summary of the invention
In order to overcome shortcoming and defect in the prior art, the primary purpose of the present invention is that providing a kind of for grease point
From wellability miillpore filter preparation method, this method utilizes the binding ability of silane coupling agent, by the way of stifling pair
Membrane material is pre-processed, and the rapid hydrolysis ability of butyl titanate and the quick water of hexadecyl trimethoxy silane are recycled
Solution ability is configured to uniform, transparent casting solution, and membrane material is placed in casting solution after of short duration immersion, and taking-up is dried and can be obtained
To special wellability miillpore filter.This method preparation process is simple, material price is cheap and experimentation in be not directed to toxic examination
Agent is suitable for industrialized production.
Another object of the present invention is to provide the wellability micropores for water-oil separating obtained by above-mentioned preparation method
Filter membrane, the miillpore filter have the characteristics that high-intensitive, high separating efficiency.
A further object of the present invention is to provide above-mentioned wellability miillpore filters to handle uniform oil mixing with water lotion point
From application in the process, the separating property of the filter membrane is excellent, all has in the leakage of water-oil separating, sewage treatment and offshore oil
Extensive industrial application value.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of preparation method of the wellability miillpore filter for water-oil separating, includes the following steps:
3- aminopropyl triethoxysilane is dissolved in polar organic solvent, it is molten to obtain 3- aminopropyl triethoxysilane
Liquid fumigates miillpore filter with 3- aminopropyl triethoxysilane solution, then takes out miillpore filter drying, obtains 3- ammonia
Propyl-triethoxysilicane miillpore filter;Hexadecyl trimethoxy silane and butyl titanate are dissolved in polar organic solvent
In, homogeneous and transparent casting solution is obtained, 3- aminopropyl triethoxysilane miillpore filter is immersed in casting solution and reacts film forming,
It takes out, dries to get the wellability miillpore filter for water-oil separating is arrived.
Preferably, 3- aminopropyl triethoxysilane and polarity are organic in the 3- aminopropyl triethoxysilane solution
The volume ratio of solvent is 1:8~1:10.
It is furthermore preferred that the concentration of 3- aminopropyl triethoxysilane is in the 3- aminopropyl triethoxysilane solution
12~18wt.%.
Preferably, the stifling condition is that 3- aminopropyl triethoxysilane solution is heated to 75~95 DEG C to micro-
Hole filter membrane fumigates 1~7h.
Preferably, drying condition when taking out miillpore filter drying is that 1~5h is dried at 60 DEG C.
Preferably, in the casting solution, the volume ratio of hexadecyl trimethoxy silane and butyl titanate is 1:0.5
~1:1.5.
Preferably, in the casting solution, the volume ratio of hexadecyl trimethoxy silane and polar organic solvent is 1:
12~1:20.
It is furthermore preferred that the concentration of hexadecyl trimethoxy silane is 3~5wt.% in the casting solution.
Preferably, when a length of 1~15min of the described reaction film forming.
It is furthermore preferred that when a length of 10~15min of the described reaction film forming.
Preferably, the condition of the drying handles 1~5h to be put into 60 DEG C of baking ovens after surface drying at room temperature.
It is furthermore preferred that the condition of the drying handles 4~5h to be put into 60 DEG C of baking ovens after surface drying at room temperature.
Preferably, the polar organic solvent is one or more of methanol, ethyl alcohol and isopropanol.
Preferably, the miillpore filter is that polytetrafluoroethylene (PTFE) miillpore filter, polyvinylidene fluoride microporous filtering film and nylon are micro-
One or more of hole filter membrane.
Preferably, the aperture of the miillpore filter is 0.22 μm~0.45 μm.
The present invention further provides a kind of wellability miillpore filters for water-oil separating obtained by above-mentioned preparation method.
The present invention further provides the applications of above-mentioned wellability miillpore filter, and the wellability miillpore filter is used for oil
Water separation, separative efficiency is up to 99.95%, and the wellability miillpore filter can tolerate pressure and reach 0.1MPa, by 30 repetitions
After use, separative efficiency is still maintained at 99.9% or more, has excellent cyclical stability in use.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1, the present invention pre-processes miillpore filter substrate using 3- aminopropyl triethoxysilane solution.3- aminopropyl
Triethoxysilane evaporates upwards during heating and hydrolysis occurs with the moisture in air and sinks after being further condensed
A part of hydroxyl that product generates in substrate surface, 3- aminopropyl triethoxysilane hydrolytic process can be with the hydroxyl of substrate surface
Base junction is closed to being securely attached to substrate table, and then miillpore filter is placed in baking oven and carries out further curing process, can be into
One step enhances the binding force between 3- aminopropyl triethoxysilane and substrate.
2, the present invention has selected the butyl titanate with rapid hydrolysis ability and the hexadecane with fast hydrolyzing ability
Base trimethoxy silane is to miillpore filter further progress hydrophobic treatment.Wherein, butyl titanate and hexadecyl trimethoxy
The condensation of silane cohydrolysis can produce coarse microstructure, and hexadecyl trimethoxy silane has chain alkyl, substantially reduces
The surface of material can, the wellability miillpore filter that thus prepares has the superhydrophobic property of air phase and oily phase, and aperture exists
Between 100nm~400nm, the uniform oil hydrosol stable to emulsifier has excellent separating property, and separative efficiency is up to
99.95%, and the tolerable pressure of film reach 0.1MPa, by 30 times reuse after, separative efficiency be still maintained at 99.9% with
On, there is excellent cyclical stability in use.
3, the preparation method that the present invention uses has universality to substrate, can be used for polytetrafluoroethylene (PTFE) miillpore filter, gathers inclined fluorine
The modification of ethylene miillpore filter, nylon micro porous filter membrane.In addition, not needing acid-base catalysis in the preparation method, the reaction time is than passing
The sol-gal process of system greatly shortens, and the material of use is not directed to fluoride, relative low price.The process is simple, has
Conducive to realization industrialized production.
Detailed description of the invention
Fig. 1 is wellability microporous membrane surface the connecing in air Xiang Zhongyu water for water-oil separating prepared by embodiment 1
Feeler picture.
Fig. 2 is contact angle figure of the wellability miillpore filter for water-oil separating in oily Xiang Zhongyu water of the preparation of embodiment 1
Piece.
Fig. 3 is the sand core filter device figure that water-oil separating is used in embodiment 4.
Fig. 4 is optical contrast figure of the wellability miillpore filter for water-oil separating to water-oil separating of the preparation of embodiment 1.
Fig. 5 is optical contrast figure of the wellability miillpore filter for water-oil separating to water-oil separating of the preparation of embodiment 2.
Fig. 6 is optical contrast figure of the wellability miillpore filter for water-oil separating to water-oil separating of the preparation of embodiment 3.
Fig. 7 is that the wellability miillpore filter repetition water-oil separating for water-oil separating prepared by embodiment 1 uses 1 time, 5
Secondary, 10 times, the permeate optical photograph after 20 times and 30 times.
Specific embodiment
Below with reference to embodiment and attached drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited
In this.For not specifically specified technological parameter, routine techniques progress can refer to.
Embodiment 1
The wellability miillpore filter and preparation method thereof that the present embodiment provides a kind of for water-oil separating.
Should the preparation method is as follows:
(1) the 3- aminopropyl triethoxysilane for measuring 1ml is placed in small beaker, then abundant toward beaker addition 8ml methanol
Dissolution.Small beaker is integrally placed into large beaker, by 0.22um Vingon filtering with microporous membrane placed face down small
Beaker rim of a cup is sealed large beaker with aluminium-foil paper and polybag, after heating 1h on 95 DEG C of electric hot plate, filter membrane is taken out, in 60
1h is handled in DEG C baking oven, obtains 3- aminopropyl triethoxysilane miillpore filter.
(2) hexadecyl trimethoxy silane for measuring 1ml shakes up mixing in 20ml polar organic solvent, then measures
The butyl titanate of 0.5ml is added thereto to be shaken up again, obtains uniform, transparent casting solution.
(3) above-mentioned 3- aminopropyl triethoxysilane miillpore filter is soaked into react in above-mentioned casting solution and is formed a film, 1min
After take out, be put into after surface drying in 60 DEG C of baking ovens at room temperature and handle 1h, obtain the wellability micropore for water-oil separating
Filter membrane.
Embodiment 2
The wellability miillpore filter and preparation method thereof that the present embodiment provides a kind of for water-oil separating.
Should the preparation method is as follows:
(1) the 3- aminopropyl triethoxysilane for measuring 1ml is placed in small beaker, then 9ml isopropanol is added toward beaker and fills
Divide dissolution.Small beaker is integrally placed into large beaker, the nylon micro porous filter membrane filtering in the aperture 0.45um is placed on down
Small beaker rim of a cup is sealed large beaker with aluminium-foil paper and polybag, after heating 3h on 95 DEG C of electric hot plate, takes out filter membrane, in
3h is handled in 60 DEG C of baking ovens, obtains 3- aminopropyl triethoxysilane miillpore filter.
(2) hexadecyl trimethoxy silane vortex mixing in 20ml polar organic solvent of 1ml is measured, then is measured
The butyl titanate of 1ml is added thereto vortex again, obtains uniform, transparent casting solution.
(3) above-mentioned 3- aminopropyl triethoxysilane miillpore filter is soaked into react in above-mentioned casting solution and is formed a film, 8min
After take out, be put into after surface drying in 60 DEG C of baking ovens at room temperature and handle 3h, obtain the wellability micropore for water-oil separating
Filter membrane.
Embodiment 3
The wellability miillpore filter and preparation method thereof that the present embodiment provides a kind of for water-oil separating.
Should the preparation method is as follows:
(1) the 3- aminopropyl triethoxysilane for measuring 1ml is placed in small beaker, then abundant toward beaker addition 10ml ethyl alcohol
Dissolution.Small beaker is integrally placed into large beaker, is that 0.45um polytetrafluoroethylene (PTFE) filtering with microporous membrane faces decentralization by aperture
It sets in small beaker rim of a cup, is sealed large beaker with aluminium-foil paper and polybag, after heating 7h on 75 DEG C of electric hot plate, take out filter
Film handles 5h in 60 DEG C of baking ovens, obtains 3- aminopropyl triethoxysilane miillpore filter.
(2) hexadecyl trimethoxy silane vortex mixing in 12ml polar organic solvent of 1ml is measured, then is measured
The butyl titanate of 1.5ml is added thereto vortex again, obtains uniform, transparent casting solution.
(3) above-mentioned 3- aminopropyl triethoxysilane miillpore filter is soaked into react in above-mentioned casting solution and is formed a film, 15min
After take out, be put into after surface drying in 60 DEG C of baking ovens at room temperature and handle 5h, obtain the wellability micropore for water-oil separating
Filter membrane.
Embodiment 4
The present embodiment provides the performance measurements of the wellability miillpore filter of Examples 1 to 3 preparation.
(1) behavioural analysis of the water droplet in film surface (air phase)
The wellability miillpore filter prepared using embodiment 1 is existed as experimental subjects using contact angle measurement measurement film surface
Contact angle in air phase.The water outlet drop volume for adjusting syringe is that 5 μ L carry out Contact-angle measurement.It is repeated on different location
Five times test as a result, contact angle test result be 155 °, contact angle picture is as shown in Figure 1, it was demonstrated that the present invention gained wellability
Miillpore filter has superhydrophobic property.
(2) behavioural analysis of the water droplet in film surface (oily phase)
The wellability miillpore filter prepared using embodiment 1 is existed as experimental subjects using contact angle measurement measurement film surface
Contact angle in oily phase.Filter membrane is fixed in culture dish with double-sided adhesive, the petroleum ether leaching of 10ml or so is added into culture dish
Stain filter membrane, and filter membrane upper surface and liquid level distance is made to be greater than 10 μm.Adjustment test drop volume is 5 μ L, and water droplet is protruded into oily phase
In, needle point is touched, measures water droplet drop in filter membrane surface.Repeated five times on different location test as a result, contact angle
Test result is 160 °.Since in oily phase, the adhesion strength between film and water droplet is minimum, water droplet rolls after dripping in film surface immediately
It walks, can hardly stop, as shown in Fig. 2, this illustrates that wellability miillpore filter obtained by the present invention has the lower superhydrophobic property of oil.
(3) water-oil separating cross-reference
Using the special wellability miillpore filter of Examples 1 to 3 preparation as experimental subjects, at room temperature, in 0.1MPa
Under, its separating property to edible oil/aqueous systems water-in-oil emulsion is measured using sand core filter device (see Fig. 3).Before separation
Afterwards, permeate has apparent different from stoste, and uniform emulsion form is presented in stoste, and liquid becomes clear after separating.Such as
Shown in Fig. 4,5,6.
(4) water-oil separating performance measures
Using the special wellability miillpore filter of Examples 1 to 3 preparation as experimental subjects, at room temperature, in 0.1MPa
Under, its separating property to edible oil/aqueous systems water-in-oil emulsion is measured using sand core filter device.Separation front and back, penetrates
Liquid and stoste have apparent different, and stoste is presented uniform emulsion form, and liquid change clear after separating.As shown in the figure.
Wherein water-in-oil emulsion is to mix oil with the volume ratio of 98:2 with water, the polysorbas20 of 2.5mg/ml is added, with vortex machine whirlpool
Ultrasound 1h is obtained after whirlpool 10min.Separating property result see the table below 1.
The water-oil separating performance of the special wellability seperation film of table 1
|
Moisture content before separating |
Moisture content after separation |
Separative efficiency |
Embodiment 1 |
2% |
< 0.002% |
99.24% |
Embodiment 2 |
2% |
< 0.002% |
99.15% |
Embodiment 3 |
2% |
< 0.001% |
99.95% |
(3) cyclical stability of film
The wellability miillpore filter prepared using embodiment 1 is experimental subjects, at room temperature, at 0.1MPa, utilizes
Sand core filter device (see Fig. 3) separates edible oil/aqueous systems water-in-oil emulsion.Every time after separation, anhydrous second is used
Alcohol is cleaned by ultrasonic film 30min, then film is placed in 60 DEG C of baking ovens and is dried 1h, then is used to separate test for film.Film is repeated
Using 30 times, separating property is measured using karl Fischer moisture titration every time.Measurement result is indicated, reuses 30
During secondary, membrane separation efficiency is held in 99.9% or more, this indicates that wellability miillpore filter prepared by the present invention has
Cyclical stability.The permeate optical photograph being illustrated in figure 7 after reusing 1 time, 5 times, 10 times, 20 times and 30 times, from figure
The visible permeate of piece is clear state.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.