CN104190111A - Oil-water separation screen membrane with lead ion responsiveness and preparation method of membrane - Google Patents
Oil-water separation screen membrane with lead ion responsiveness and preparation method of membrane Download PDFInfo
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Abstract
The invention discloses an oil-water separation screen membrane with lead ion responsiveness and a preparation method of the membrane. The oil-water separation screen membrane comprises the following steps: (1) mixing 3-Hydroxytyramine hydrochloride and a buffering solution with the pH valve being 8.0-12.0 to obtain a mixed solution; (2) soaking the screen membrane with the mixed solution; and (3) dissolving a mercaptan compound and an alkaline medium in water to obtain turbid liquid, and soaking the screen membrane taken in the step (2) with the turbid liquid, thus obtaining the oil-water separation screen membrane with super hydrophilicity/hydrophobicity and lead ion responsiveness. The oil-water separation screen membrane disclosed by the invention can be used for treating sewage containing oil and lead ions. Because of lead ion responsiveness, the oil-water separation screen membrane can realize high oil-water separation efficiency and speed, and can also be used for monitoring lead ions, thus enhancing the performance of a separation device, and simplifying a sewage treating device; the screen membrane is non-toxic and harmless, environmentally friendly, high in stability, and can be used for wide-range preparation.
Description
Technical field
The invention belongs to solid material surface modification field, be specifically related to a kind of water-oil separating nethike embrane with lead ion response and preparation method thereof.
Background technology
Environmental pollution is to be accompanied by the fast development of modern industrial society and next world's problem, in industrial production, can discharge in a large number the complex wastewater that contains heavy metal, contains greasy dirt, and therefore efficient processing, separation and recovery oil-polluted water become the problem of needing solution badly.Current, utilize special wellability surfacing to carry out water-oil separating, become the study hotspot of material science.And the heavy metal that may exist in oil-polluted water can produce and have a strong impact on whole sewage disposal system.
Heavy metal ion monitoring in sewage, often needs very accurate instrument.As needed to use ion indicator or cold atom absorption spectrum in the observation process of lead ion, the former need to expend a large amount of chemical reagent, although and the latter is accurately wasted time and energy.
Now existing patent report utilizes temperature, pH, humidity as the response factor in oil water separation process.The dimethylaminoethyl methacrylate as utilized in CN103111096A with temperature and pH double-response characteristic is modified nethike embrane, obtains and has under water the temperature of super oleophobic properties, the water-oil separating nethike embrane of pH double-response.And in CN103601826A, utilize esterification to obtain hydrophobic-hydrophilic alternating structure, can realize humidity response.Above-mentioned patent only relates to the certain fields of response water-oil separating, and for ion, particularly lead ion does not also have relevant report at present.The water-oil separating nethike embrane of lead ion response will play an important role to the processing of oil-containing complex wastewater system.
Summary of the invention
The object of this invention is to provide a kind of water-oil separating nethike embrane with lead ion response and preparation method thereof, simultaneously, this water-oil separating nethike embrane can be realized fast from hydrophilic to hydrophobicity fundamental change under lead ion regulation and control, thereby reaches the controlled oil-water separation of original position.
A kind of preparation method who has lead ion response and have the water-oil separating nethike embrane of hydrophilic oleophobic properties provided by the present invention, comprises the steps:
(1) cushioning liquid that is 8.0～12.0 by Dopamine hydrochloride and pH value is mixed to get mixed solution;
(2) nethike embrane be impregnated in described mixed solution, obtain the nethike embrane of the coated poly-dopamine in surface;
(3) mercaptan compound and alkaline medium are scattered in and in water, obtain suspension, and the nethike embrane of the coated poly-dopamine in the surface that step (2) is obtained impregnated in described suspension, after taking-up, obtain described water-oil separating nethike embrane.
In above-mentioned preparation method, in step (1), the mass fraction of described Dopamine hydrochloride in described mixed solution is 0.1%～20.0%, is preferably 0.1%～1.0%, is specially 0.2～0.6%.
The pH value of described cushioning liquid is preferably 8.5.
Described cushioning liquid is specially the cushioning liquid (being TRIS-HC1 buffer solution) of Tri(Hydroxymethyl) Amino Methane Hydrochloride.
In above-mentioned preparation method, in step (2), described nethike embrane can be metal fabric net or metal sponge; The order number of described nethike embrane is 100 order～1000 orders, is specially 400～1000 orders.Described metal fabric netting gear body can be stainless (steel) wire, iron net, titanium net or aluminium alloy net, and described metal sponge specifically can be copper sponge or chromium sponge.
The time of described dipping can be 12～72 hours, is specially 48～72 hours.
In above-mentioned preparation method, in described step (2) before, described method also comprises the step that nethike embrane is cleaned.The mixed solution of concrete available ethanol and acetone (volume ratio is 1:1) cleans (as ultrasonic cleaning) to described nethike embrane.
In above-mentioned preparation method, in step (3), the mass fraction of described mercaptan compound in described suspension is 0.1%～25.0%, is preferably 0.1%～10.0%, is specially 2.5%～5.0%.
Described mercaptan compound is the carboxylic acid polyalcohol that thiocarboxylic acid and/or end group contain sulfydryl.
Described thiocarboxylic acid be selected from following at least one: TGA, sulfydryl butyric acid, dimercapto propionic acid, dimercaptosuccinic acid, mercapto succinic acid, cysteine, homocysteine and glutathione.
Described end group is specially end group containing the polyacrylic acid of sulfydryl, the polymethylacrylic acid that end group contains sulfydryl etc. containing the carboxylic acid polyalcohol (connected or synthesized by RAFT by covalent bond) of sulfydryl, is preferably end group containing the polyacrylic acid of sulfydryl.
Described end group is 100～1000 containing the degree of polymerization of the carboxylic acid polyalcohol of sulfydryl, is preferably 500～1000.
Described end group specifically can prepare by following method containing the polyacrylic acid of sulfydryl:
By 7.2g acrylic acid (AA), 26.3mg chain-transferring agent (CTA, as: 4-cyano group-4-ethyl three thioester substrate valeric acids), 3.2mg azodiisobutyronitrile (AIBN) and 5mL methyl alcohol is placed in polymerization pipe, magnetic agitation mixes, and uses nitrogen bubble 15min to remove the oxygen in reaction system.After bubbling finishes, above-mentioned polymerization pipe is placed in the oil bath of 60 ℃ and reacts 12h.Pass into oxygen and stop reaction, use ether sedimentation washing to obtain the polyacrylic acid of purifying for three times.
The mass fraction of described alkaline medium in described mixing suspension is 0.1%～10.0%, is preferably 0.1%～5.0%, more preferably 0.1%～2.0%, specifically can be 1.0%.
Described alkaline medium be selected from following at least one: NaOH, potassium hydroxide, barium hydroxide and ammoniacal liquor, be preferably NaOH.
The time of described dipping is 3～24 hours, is specially 12～24 hours.
The water-oil separating nethike embrane that said method prepares also belongs to protection scope of the present invention, and its mesh aperture is 13～150 microns, specifically can be 13～40 microns.
A further object of the present invention is to utilize the characteristic of above-mentioned water-oil separating nethike embrane to lead ion response, and a kind of method of monitoring lead ion in oil-polluted water is provided.
Described method is specific as follows: with the separated oil-polluted water of described water-oil separating nethike embrane; If described water-oil separating nethike embrane still keeps the characteristic of hydrophilic oleophobic, show in described oil-polluted water not containing lead ion; If the characteristic of the hydrophilic oleophobic of described water-oil separating nethike embrane changes (as becoming hydrophilic and oleophilic, hydrophobic oleophylic), show to contain in oil-polluted water lead ion.
When in oil-polluted water, lead ion reaches the saturated concentration of lead ion in the aqueous solution, the surface property of described water-oil separating nethike embrane can be hydrophobic oleophylic by hydrophilic oleophobic fast transition; When in oil-polluted water, lead ion is lower than the saturated concentration of lead ion in the aqueous solution, only needing increases the dip time of described water-oil separating nethike embrane in oil-polluted water, finally also can make the characteristic of the hydrophilic oleophobic of described water-oil separating nethike embrane change (as becoming hydrophilic and oleophilic, hydrophobic oleophylic).
A further object of the present invention is to utilize the characteristic of above-mentioned water-oil separating nethike embrane to lead ion response, and a kind of method that purifies lead ion in oil-polluted water is provided.
Described method is the oil-polluted water containing lead ion with described oil-water separating net membrane filtration, makes carboxylic acid ion and the lead ion generation chelatropic reaction on water-oil separating nethike embrane surface, thereby reaches the object that purifies lead ion in oil-polluted water.
Described lead ion is lead (II) ion or tetravalence lead ion.
Water-oil separating nethike embrane provided by the invention has under water the oil properties of dredging, its under water to the contact angle of oil droplet at 150 °.Utilize the hydrophily of its surface coated carboxylic acid compound hydrogel simultaneously, with and micrometer grade hole gap, can make water wetting nethike embrane passing through rapidly.
Water-oil separating nethike embrane provided by the invention also has lead ion response, be that described water-oil separating nethike embrane has hydrophilic oleophobic property under the sewage disposal environment without lead ion, can cross only oil of water, and in having the environment of lead ion, wellability can occur described water-oil separating nethike embrane changes, by hydrophilic oleophobic property, change hydrophobic lipophile into, can cross only water of oil.
The water-oil separating nethike embrane with lead ion response provided by the invention, can be for oil-containing, containing in the sewage disposal of lead ion.The lead ion response that described water-oil separating nethike embrane has, can realize separative efficiency high, and the water-oil separating performance that separating rate is fast can be monitored lead ion simultaneously, thereby strengthens separator performance, simplifies sewage-treatment plant.
Water-oil separating nethike embrane provided by the invention is nontoxic, and environmental friendliness has good stability, can be used for preparing on a large scale.
Accompanying drawing explanation
Fig. 1 is the surface topography stereoscan photograph of the water-oil separating nethike embrane of preparation in the embodiment of the present invention 1.
Fig. 2 be the water-oil separating nethike embrane of preparation in the embodiment of the present invention 1 at original state A, the water in air modifying B after dopamine, modify C after polyacrylic acid, impregnated in D after 1mg/mL lead ion solution and impregnated in E after saturated lead ion solution shape picture and the angle of dripping oil droplet in (1.5 milliliters) and water change.
Fig. 3 is that the water-oil separating nethike embrane of the embodiment of the present invention 1 preparation is for separating of experimental provision and the experiment effect photo of oil water mixture.A is the water-oil separating nethike embrane under normal condition, and b is the water-oil separating nethike embrane impregnated in after 1mg/mL lead ion solution, and c is the water-oil separating nethike embrane impregnated in after saturated lead ion solution.
The specific embodiment
Below by specific embodiment, the present invention will be described, but the present invention is not limited thereto.
Experimental technique described in following embodiment, if no special instructions, is conventional method; Described reagent and material, if no special instructions, all can obtain from commercial channels.
The polyacrylic acid that the present invention's end group used contains sulfydryl is to obtain by being prepared as follows method: by 7.2g acrylic acid (AA), 26.3mg chain-transferring agent (CTA, as: 4-cyano group-4-ethyl three thioester substrate valeric acids), 3.2mg azodiisobutyronitrile (AIBN) and 5mL methyl alcohol is placed in polymerization pipe, magnetic agitation mixes, and uses nitrogen bubble 15min to remove the oxygen in reaction system.After bubbling finishes, above-mentioned polymerization pipe is placed in the oil bath of 60 ℃ and reacts 12h.Pass into oxygen and stop reaction, use ether sedimentation washing to obtain the polyacrylic acid of purifying for three times.
Embodiment 1, prepare the response water-oil separating nethike embrane of hydrophilic oleophobic
(1) 1000 object stainless (steel) wires being immersed in to volume ratio is in the acetone of 1:1 and the mixed solution of ethanol ultrasonic 30 minutes, hot blast drying after cleaning;
(2) at ambient temperature, in the beaker of 100mL, add the water of 60mL and the trishydroxymethylaminomethane of 0.24g, stir, splash into hydrochloric acid solution and regulate pH to 8.5, obtain mixing cushioning liquid (TRIS-HCl buffer solution);
(3) the mixing cushioning liquid that adds step (2) to obtain 0.12g Dopamine hydrochloride, obtains mixed solution.In this mixed solution, the quality percentage composition of Dopamine hydrochloride is 0.20%, and the quality percentage composition of trishydroxymethylaminomethane is 0.40%;
(4) the dried stainless (steel) wire of step (1) be impregnated in to the mixed solution that step (3) obtains, place after 72 hours, take out and use deionized water rinsing, naturally dry;
(5) at room temperature, to adding in the beaker of 100mL 60mL water, 3.0g to obtain polyacrylic acid that the degree of polymerization is 500 and the NaOH of 0.6g by RAFT method, stir and obtain end group containing the polyacrylic suspension of sulfydryl, can smell the distinctive stink of mercaptan.Wherein, the initial polyacrylic quality percentage composition adding is 5.0%, and the quality percentage composition of NaOH is 1.0%;
(6) stainless (steel) wire that Dopamine hydrochloride step (4) being obtained is modified impregnated in the suspension in step (5).Normal temperature was placed after 12 hours, with deionized water rinsing, obtained having the water-oil separating nethike embrane of hydrophilic oleophobic property and lead ion response after drying.
As shown in Figure 1, as seen from the figure, the average pore size of its mesh is 13 microns to the surface topography scanned photograph of the water-oil separating nethike embrane that the present embodiment obtains.
In air, measuring the water-oil separating nethike embrane that the present embodiment obtains is 0 ° to the contact angle of the water droplet of 1.5 microlitres, and in water, the contact angle of oil droplet is 150 ° (as shown in Figure 2 C).Than 132 ° of the water contact angles of original stainless (steel) wire, 129 ° of oily contact angles (as shown in Figure 2 A), with 67 ° of water contact angles modifying stainless (steel) wire after dopamine,, there is obvious variation in 144 ° of oily contact angles (as shown in Figure 2 B).
When described water-oil separating nethike embrane was immersed in respectively 1mg/mL and saturated lead ion solution after 5 minutes, its contact angle demonstrates the wellability of water-oil separating nethike embrane and reverses.Be immersed in after 1mg/mL lead ion solution, its water contact angle becomes 122 °, and oily contact angle becomes 138 ° (as shown in Figure 2 D).And after the saturated lead ion solution of dipping, its water contact angle is 122 °, oily contact angle is 0 ° (as shown in Figure 2 E).
Utilize the experimental provision shown in Fig. 3 to carry out oil-water separation test.Described water-oil separating nethike embrane is placed in to the two ends polytetrafluoroethylene (PTFE) fixture of fixing glass pipe, and the benzinum that is 1:1 by volume ratio (oil red dyeing) is poured top feed pipe (as shown in Figure 3 a) into the mixture of water.Water flows out by profit nethike embrane and from below glass tube rapidly, and red benzinum is blocked in the upper end of water-oil separating nethike embrane simultaneously, obtains the You Heshui after separation, realizes separated object.
Utilize above-mentioned experimental provision to carry out lead ion response test.The benzinum aqueous mixtures that is 1:1 by volume ratio respectively pours into and is immersed on 1mg/mL and the saturated lead ion aqueous solution water-oil separating nethike embrane after 5 minutes.As shown in Figure 3 b, water-oil separating nethike embrane after profit can be processed by the lead ion aqueous solution through 1mg/mL, and when water-oil separating nethike embrane is submerged in saturated lead ion solution, oil can see through nethike embrane and water can be blocked in (as shown in Figure 3 c) on nethike embrane.
When the benzinum aqueous mixtures that is 1:1 by volume ratio pours on the water-oil separating film being immersed in after 0.01mg/mL lead ion aqueous solution 24h, can realize equally that oil sees through nethike embrane and water can be blocked in the effect on nethike embrane.
Embodiment 2, prepare the response water-oil separating nethike embrane of hydrophilic oleophobic
(1) 400 object copper mesh being immersed in to volume ratio is in the acetone of 1:1 and the mixed solution of ethanol ultrasonic 30 minutes, hot blast drying after cleaning;
(2) at ambient temperature, in the beaker of 100mL, add the water of 60mL and the trishydroxymethylaminomethane of 0.24g, stir, splash into hydrochloric acid solution and regulate pH to 8.5, obtain mixing cushioning liquid;
(3) Dopamine hydrochloride of 0.36g is added in the mixing cushioning liquid that step (2) obtains, obtain mixed solution.In this mixed solution, the quality percentage composition of Dopamine hydrochloride is 0.60%, and the quality percentage composition of trishydroxymethylaminomethane is 0.40%;
(4) the dried copper mesh of step (1) be impregnated in the mixed solution that step (3) obtains, place after 48 hours, take out and use deionized water rinsing, naturally dry;
(5) at room temperature, to the water that adds 60mL in the beaker of 100mL, the polyacrylic acid that 1.5g is 1000 by the RAFT method acquisition degree of polymerization and the NaOH of 0.6g, stir and obtain end group containing the polyacrylic suspension of sulfydryl, can smell the distinctive stink of mercaptan.Wherein, the initial polyacrylic quality percentage composition adding is 2.5%, and the quality percentage composition of NaOH is 1.0%;
(6) copper mesh that Dopamine hydrochloride step (3) being obtained is modified impregnated in the suspension in step (5).Normal temperature was placed after 12 hours, with deionized water rinsing, obtained having the water-oil separating nethike embrane of hydrophilic oleophobic property and lead ion response after drying.
The average pore size of the mesh of the water-oil separating nethike embrane that the present embodiment obtains is 38 microns.
In air, measuring the water-oil separating nethike embrane that the present embodiment obtains is 0 ° to the contact angle of the water droplet of 1.5 microlitres, and in water, the contact angle of oil droplet is 150 °.In the lead ion aqueous solution of described oil-water separating net film immersion at 1mg/mL, after 5 minutes, its contact angle demonstrates the wellability of water-oil separating nethike embrane and reverses, and after impregnated in the saturated lead ion aqueous solution, its water contact angle is 120 °, and oily contact angle is 0 °.
Utilize the experimental provision shown in Fig. 3 to carry out oil-water separation test.Described water-oil separating nethike embrane is placed in to the two ends polytetrafluoroethylene (PTFE) fixture of fixing glass pipe, and the benzinum that is 1:1 by volume ratio (oil red dyeing) is poured top feed pipe into the mixture of water.Water flows out by profit nethike embrane and from below glass tube rapidly, and red benzinum is blocked in the upper end of water-oil separating nethike embrane simultaneously, obtains the You Heshui after separation, realizes separated object.
Utilize above-mentioned experimental provision to carry out lead ion response test.The benzinum aqueous mixtures that is 1:1 by volume ratio pours into and in the saturated lead ion aqueous solution, floods on the water-oil separating nethike embrane after 5 minutes, and oil can see through nethike embrane and water can be blocked on nethike embrane.
Embodiment 3, prepare the response water-oil separating nethike embrane of hydrophilic oleophobic
(1) 1000 object aluminium alloy nets being immersed in to volume ratio is in the acetone of 1:1 and the mixed solution of ethanol ultrasonic 30 minutes, hot blast drying after cleaning;
(2) at ambient temperature, in the beaker of 100mL, add the water of 60mL and the trishydroxymethylaminomethane of 0.24g, stir, splash into hydrochloric acid solution and regulate pH to 8.5, obtain mixing cushioning liquid;
(3) the mixing cushioning liquid that adds step (2) to obtain the Dopamine hydrochloride of 0.36g, obtains mixed solution.In this mixed solution, the quality percentage composition of Dopamine hydrochloride is 0.60%, and the quality percentage composition of trishydroxymethylaminomethane is 0.40%;
(4) the dried aluminium alloy net of step (1) be impregnated in the mixed solution that step (3) obtains, place after 72 hours, take out and use deionized water rinsing, naturally dry;
(5) at room temperature, to the NaOH that adds water, 3.0g mercapto succinic acid and the 0.6g of 60mL in the beaker of 100mL, stir the suspension that obtains mercapto succinic acid, can smell the distinctive stink of mercaptan.Wherein, the initial polyacrylic quality percentage composition adding is 5.0%, and the quality percentage composition of NaOH is 1.0%;
(6) the aluminium alloy net that Dopamine hydrochloride step (3) being obtained is modified impregnated in the suspension in step (5).Normal temperature was placed after 24 hours, with deionized water rinsing, obtained having the water-oil separating nethike embrane of hydrophilic oleophobic property and lead ion response after drying.
The average pore size of the mesh of the water-oil separating nethike embrane that the present embodiment obtains is 13 microns.
In air, measuring the water-oil separating nethike embrane that the present embodiment obtains is 0 ° to the contact angle of the water droplet of 1.5 microlitres, and in water, the contact angle of oil droplet is 150 °.In the lead ion aqueous solution of described oil-water separating net film immersion at 1mg/mL, after 5 minutes, its contact angle demonstrates the wellability of water-oil separating nethike embrane and reverses, and after soaking saturated lead ion solution, its water contact angle is 120 °, and oily contact angle is 0 °.
Utilize the experimental provision shown in Fig. 3 to carry out oil-water separation test.Described water-oil separating nethike embrane is placed in to the two ends polytetrafluoroethylene (PTFE) fixture of fixing glass pipe, and the benzinum that is 1:1 by volume ratio (oil red dyeing) is poured top feed pipe into the mixture of water.Water flows out by profit nethike embrane and from below glass tube rapidly, and red benzinum is blocked in the upper end of water-oil separating nethike embrane simultaneously, obtains the You Heshui after separation, realizes separated object.
Utilize above-mentioned experimental provision to carry out lead ion response test.The benzinum aqueous mixtures that is 1:1 by volume ratio pours into and in the saturated lead ion aqueous solution, floods on the water-oil separating nethike embrane after 5 minutes, and oil can see through nethike embrane and water can be blocked on nethike embrane.
Claims (10)
1. a preparation method for water-oil separating nethike embrane, comprises the steps:
(1) cushioning liquid that is 8.0～12.0 by Dopamine hydrochloride and pH value is mixed to get mixed solution;
(2) nethike embrane be impregnated in described mixed solution, obtain the nethike embrane of the coated poly-dopamine in surface;
(3) mercaptan compound and alkaline medium are scattered in and in water, obtain suspension, and the nethike embrane of the coated poly-dopamine in the surface obtaining in step (2) be impregnated in described suspension, described in obtaining after taking-up, there is the water-oil separating nethike embrane of super hydrophilic oleophobic property and lead ion response.
2. preparation method according to claim 1, is characterized in that: in step (1), the mass fraction of described Dopamine hydrochloride in described mixed solution is 0.1%～20.0%;
The pH value of described cushioning liquid is 8.5;
Described cushioning liquid is the cushioning liquid of Tri(Hydroxymethyl) Amino Methane Hydrochloride.
3. preparation method according to claim 1 and 2, is characterized in that: in step (2), described nethike embrane is metal fabric net or metal sponge;
The order number of described nethike embrane is 100 order～1000 orders;
Described metal fabric net is specially stainless (steel) wire, iron net, titanium net or aluminium alloy net;
Described metal sponge is specially copper sponge or chromium sponge;
The time of described dipping can be 12～72 hours.
4. according to the preparation method described in any one in claim 1-3, it is characterized in that: before, described method also comprises the step that copper mesh is cleaned to described step (2).
5. according to preparation method described in any one in claim 1-4, it is characterized in that: in step (3), the mass fraction of described mercaptan compound in described suspension is 0.1%～25.0%;
Described mercaptan compound is the carboxylic acid polyalcohol that thiocarboxylic acid and/or end group contain sulfydryl;
Described thiocarboxylic acid be selected from following at least one: TGA, sulfydryl butyric acid, dimercapto propionic acid, dimercaptosuccinic acid, mercapto succinic acid, cysteine, homocysteine and glutathione;
Described end group containing the carboxylic acid polyalcohol of sulfydryl be selected from following at least one: polyacrylic acid and polymethylacrylic acid;
Described end group is 100～1000 containing the degree of polymerization of the carboxylic acid polyalcohol of sulfydryl;
The mass fraction of described alkaline medium in described mixing suspension is 0.1%～10.0%;
Described alkaline medium be selected from following at least one: NaOH, potassium hydroxide, barium hydroxide and ammoniacal liquor;
The time of described dipping is 3～24 hours.
6. in claim 1-5, described in any one, preparation method prepares water-oil separating nethike embrane.
7. water-oil separating nethike embrane according to claim 6, is characterized in that: described water-oil separating nethike embrane has hydrophilic oleophobic property and lead ion response;
The mesh aperture of described water-oil separating nethike embrane is 13～150 microns.
8. the method for lead ion in the oil-water separating net film monitoring oil-polluted water utilizing described in claim 6 or 7, comprise lower step: with the separated oil-polluted water of described water-oil separating nethike embrane, if described water-oil separating nethike embrane still keeps the characteristic of hydrophilic oleophobic, show in described oil-polluted water not containing lead ion;
If the hydrophilic fuel shedding quality of described water-oil separating nethike embrane changes, show to contain in oil-polluted water lead ion.
9. method according to claim 8, is characterized in that: described in change into water-oil separating nethike embrane characteristic by hydrophilic oleophobic, change hydrophilic and oleophilic or hydrophobic oleophylic into.
10. utilize water-oil separating nethike embrane described in claim 6 or 7 to purify the method for lead ion in oil-polluted water, comprise the steps: to contain with described oil-water separating net membrane filtration the oil-polluted water of lead ion.
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| CN105926366A (en) * | 2016-05-19 | 2016-09-07 | 山东交通学院 | Temperature-responsive oil-water separation filter paper and preparation method thereof |
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| CN112675576A (en) * | 2019-10-17 | 2021-04-20 | 天津大学 | Oil-water separation membrane and preparation method and application thereof |
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| CN114397229A (en) * | 2021-12-24 | 2022-04-26 | 广东省科学院化工研究所 | Heavy metal response composite emulsion and preparation method and application thereof |
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