CN112090117A - Preparation method of oil-water separation material with magnetic response - Google Patents
Preparation method of oil-water separation material with magnetic response Download PDFInfo
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- CN112090117A CN112090117A CN202010998572.9A CN202010998572A CN112090117A CN 112090117 A CN112090117 A CN 112090117A CN 202010998572 A CN202010998572 A CN 202010998572A CN 112090117 A CN112090117 A CN 112090117A
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Abstract
The invention relates to a preparation method of an oil-water separation material with magnetic response, which comprises the steps of firstly, taking ferric chloride hexahydrate and ferrous sulfate tetrahydrate as raw materials, and preparing magnetic super-hydrophobic ferroferric oxide particles by a coprecipitation method under the action of a precipitator and a hydrophobic modifier; then, preparing biological viscous polydopamine by using absolute ethyl alcohol, ammonia water, deionized water and dopamine monomer; and finally dispersing the super-hydrophobic ferroferric oxide particles and polydopamine in a hydrophobic modifier solution to obtain a suspension of the super-hydrophobic ferroferric oxide particles, and then soaking the suspension in sponge to obtain the super-hydrophobic magnetic response oil-water separation material. The magnetic response oil-water separation material overcomes the defects of low separation efficiency, dependence on electric drive and poor repeatability of the traditional method, can be applied to the fields of ocean oil removal and pollution prevention, oily sewage treatment, oil-water mixture separation and the like, has an efficient oil-water separation function, can prolong the service life of the material, saves energy, and has a good application prospect.
Description
Technical Field
The invention relates to a preparation method of a magnetic response oil-water separation material, and particularly belongs to the technical field of functional materials.
Background
The super-hydrophobic material is a material of which the contact angle with water on the surface is more than 150 degrees and the rolling angle is less than 10 degrees, and whether a certain material is the super-hydrophobic material is judged mainly according to whether the surface of the material has a micro-nano structure and low surface energy. Super-hydrophobic materials have been known for a number of years because of their extensive use in the fields of self-cleaning, oil-water separation, ice-over prevention, etc.
Petroleum is industrial 'blood', is an important industrial energy source, and has important application in the industries of automobiles, machinery, spaceflight, ships and the like. But in the actual production process, serious environmental pollution problems are caused due to leakage and improper post-treatment. In recent years, the exploitation of marine oil, the discharge of oily sewage and the occurrence of oil leakage accidents by human beings cause irreversible damage to the ecological environment of the earth. The traditional oil-water separation method has the defects of low separation efficiency, need of depending on electric drive, secondary pollution and the like. Therefore, how to separate oil from water simply and efficiently becomes a worldwide problem. With the development of surface interface technology and theory, people prepare a surface interface with oleophylic and hydrophobic properties, so that oil-water separation is realized under the action of gravity only, and the surface interface has attracted extensive attention and intensive research in the field of oil-water separation. However, the super-wetting material for oil-water separation has poor environmental tolerance, troublesome post-treatment and low recycling rate. Therefore, the focus of current research on how to solve these problems.
Aiming at the problems, the invention selects ferroferric oxide with magnetic response as a functional material, prepares the super-hydrophobic ferroferric oxide nano-particles through hydrophobic modification, adopts polydopamine with biological adhesion as a connecting bridge between the nano-particles and a porous substrate to prepare the oil-water separation material with magnetic response, controls the magnetic oil-water separation material by utilizing a magnet to realize oil-water separation, has good repeatability, and is expected to become a powerful part in the high-efficiency oil-water separation material.
Disclosure of Invention
The invention aims to provide a preparation method of a magnetic-response and high-efficiency oil-water separation material. The invention relates to a preparation method of a magnetic response oil-water separation material, which comprises the following steps:
step 1: preparation of super-hydrophobic ferroferric oxide particles
Adding ferric chloride hexahydrate and ferrous sulfate tetrahydrate into a solvent according to the mass ratio of 2:1, uniformly mixing, then dropwise adding a precipitator until the pH value is 10, reacting at room temperature for 6-48 hours, respectively washing and centrifugally separating the obtained product for three times, and then sucking out ferroferric oxide particles in the product by using a magnet;
adding the ferroferric oxide particles into a hydrophobic modifier, and stirring and modifying for 6-48 h to obtain magnetic super-hydrophobic ferroferric oxide particles;
step 2: preparation of polydopamine
Uniformly mixing absolute ethyl alcohol, ammonia water, deionized water and a dopamine monomer, adjusting the pH value to 7.5-11, stirring and reacting at room temperature for 12-56 hours, and washing, centrifuging and drying a product to obtain polydopamine;
and step 3: preparation of magnetic response oil-water separation super-hydrophobic material
Dispersing 0.1-3 g of super-hydrophobic ferroferric oxide particles and 0.1-3 g of polydopamine in 30g of 1-10 wt.% hydrophobic modifier solution to obtain a suspension of the super-hydrophobic ferroferric oxide particles;
and then soaking sponge with the size of 2cm multiplied by 2cm in the suspension, performing ultrasonic dispersion for 10min, modifying at room temperature for 2-48 h, taking out the sponge, and performing heating treatment at the temperature of 40-90 ℃ for 30-240 min to obtain the super-hydrophobic magnetic response oil-water separation material.
The precipitant is one or more of sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, potassium bicarbonate, potassium hydroxide and ammonia water.
The hydrophobic modifier is one or a mixture of more of isobutyl ester, potassium stearate, sodium stearate, zinc stearate, magnesium stearate, aluminum stearate, calcium stearate, fatty acid methyl ester, aluminum tripolyphosphate, epoxidized soybean oil and epoxidized fatty acid methyl ester.
The solvent is one or a mixture of more of deionized water, acetone, absolute ethyl alcohol, toluene, xylene, ethyl acetate, dichloromethane, trichloromethane, tetrahydrofuran, diethyl ether, dioxane isopropanol, dimethyl sulfoxide, N-dimethylformamide and N, N-dimethylacetamide.
The sponge is alternately cleaned for 3 times by absolute ethyl alcohol and deionized water and then dried.
The invention has the beneficial effects that: the magnetic response oil-water separation material overcomes the defects of low separation efficiency, dependence on electric drive and complex oil removal process of the traditional oil-water separation method, is used as an ocean oil removal antifouling material, has a high-efficiency oil-water separation function, and has extremely low energy consumption in the use process, long service life and good application prospect.
Detailed Description
Example 1
This example illustrates the preparation of the oil-water separation material with magnetic response provided by the present invention.
Step 1: adding ferric chloride hexahydrate and ferrous sulfate tetrahydrate in a mass ratio of 2:1 into a clean round-mouth flask in sequence, then dropwise adding sodium bicarbonate until the pH is =10, reacting for 12 hours at room temperature, washing and centrifugally separating the obtained product for 3 times respectively, and sucking out ferroferric oxide particles by a magnet. Adding potassium stearate into a clean round-neck flask, and modifying the ferroferric oxide particles for 8 hours to obtain magnetic super-hydrophobic ferroferric oxide particles;
step 2: sequentially adding absolute ethyl alcohol, ammonia water, deionized water and dopamine monomer into a clean single-neck flask, adjusting the pH value to 7.5, reacting at room temperature for 12 hours, washing a product with absolute ethyl alcohol, centrifuging and drying to obtain polydopamine;
and 3, step 3: 0.1g of super-hydrophobic ferroferric oxide particles and 3g of polydopamine are dispersed in 30g of 2wt.% potassium stearate solution, then sponge (pretreatment: washing for 3 times by using absolute ethyl alcohol and deionized water alternately and drying for later use) of 2cm x 2cm x 2cm is soaked in the suspension, ultrasonic dispersion is carried out for 10min, modification is carried out for 4h at room temperature, the sponge is taken out and is heated and treated for 120min at 90 ℃ to obtain the magnetic response oil-water separation super-hydrophobic material.
Example 2
This example illustrates the preparation of the oil-water separation material with magnetic response provided by the present invention.
Step 1: adding ferric chloride hexahydrate and ferrous sulfate tetrahydrate in a mass ratio of 2:1 into a clean round-mouth flask in sequence, then dropwise adding sodium hydroxide until the pH is =10, reacting for 6 hours at room temperature, washing and centrifugally separating the obtained product for 3 times respectively, and sucking out ferroferric oxide particles by a magnet. Adding isobutyl ester into a clean round-neck flask, and modifying the ferroferric oxide particles for 10 hours to obtain magnetic super-hydrophobic ferroferric oxide particles;
step 2: sequentially adding absolute ethyl alcohol, ammonia water, deionized water and dopamine monomer into a clean single-neck flask, adjusting the pH value to 8, reacting at room temperature for 24 hours, washing, centrifuging and drying a product by tetrahydrofuran to obtain polydopamine;
and 3, step 3: 0.5g of super-hydrophobic ferroferric oxide particles and 2.5g of polydopamine are dispersed in 30g of 4wt.% isobutyl ester solution, then sponge (pretreatment: washing for 3 times by using absolute ethyl alcohol and deionized water alternately and drying for later use) of 2cm x 2cm x 2cm is soaked in the suspension, ultrasonic dispersion is carried out for 10min, modification is carried out for 8h at room temperature, the sponge is taken out and is heated and treated for 30min at 80 ℃, and then the magnetic response oil-water separation super-hydrophobic material is obtained.
Example 3
This example illustrates the preparation of the oil-water separation material with magnetic response provided by the present invention.
Step 1: adding ferric chloride hexahydrate and ferrous sulfate tetrahydrate in a mass ratio of 2:1 into a clean round-mouth flask in sequence, then dropwise adding potassium bicarbonate until the pH is =10, reacting for 24 hours at room temperature, washing and centrifugally separating the obtained product for 3 times, and sucking out ferroferric oxide particles by a magnet. Adding epoxidized soybean oil into a clean round-neck flask, and modifying the ferroferric oxide particles for 24 hours to obtain magnetic super-hydrophobic ferroferric oxide particles;
step 2: sequentially adding absolute ethyl alcohol, ammonia water, deionized water and dopamine monomer into a clean single-neck flask, adjusting the pH value to 8.5, reacting at room temperature for 48 hours, washing a product with diethyl ether, centrifuging and drying to obtain polydopamine;
and 3, step 3: dispersing 2g of super-hydrophobic ferroferric oxide particles and 1.5g of polydopamine in 30g of 6wt.% epoxy soybean oil solution, then soaking sponge (pretreatment: alternate cleaning for 3 times by using absolute ethyl alcohol and deionized water and drying for later use) with the size of 2cm x 2cm x 2cm in the suspension, ultrasonically dispersing for 10min, modifying for 12h at room temperature, taking out the sponge, and heating and treating for 240min at 70 ℃ to obtain the magnetic response oil-water separation super-hydrophobic material.
Example 4
This example illustrates the preparation of the oil-water separation material with magnetic response provided by the present invention.
Step 1: adding ferric chloride hexahydrate and ferrous sulfate tetrahydrate in a mass ratio of 2:1 into a clean round-mouth flask in sequence, then dropwise adding ammonia water until the pH is =10, reacting for 48 hours at room temperature, washing and centrifugally separating the obtained product for 3 times, and sucking out ferroferric oxide particles by a magnet. Adding potassium stearate into a clean round-neck flask, and modifying the ferroferric oxide particles for 6 hours to obtain magnetic super-hydrophobic ferroferric oxide particles;
step 2: sequentially adding absolute ethyl alcohol, ammonia water, deionized water and dopamine monomer into a clean single-neck flask, adjusting the pH value to 9, reacting at room temperature for 56 hours, washing a product with toluene, centrifuging and drying to obtain polydopamine;
and 3, step 3: 1.5g of super-hydrophobic ferroferric oxide particles and 0.1g of polydopamine are dispersed in 30g of 1wt.% potassium stearate solution, then sponge (pretreatment: alternate cleaning with absolute ethyl alcohol and deionized water for 3 times and drying for later use) of 2cm x 2cm x 2cm is soaked in the suspension, ultrasonic dispersion is carried out for 10min, modification is carried out for 2h at room temperature, the sponge is taken out and is heated and treated for 80min at 60 ℃ to obtain the magnetic response oil-water separation super-hydrophobic material.
Example 5
This example illustrates the preparation of the oil-water separation material with magnetic response provided by the present invention.
Step 1: adding ferric chloride hexahydrate and ferrous sulfate tetrahydrate in a mass ratio of 2:1 into a clean round-mouth flask in sequence, then dropwise adding potassium carbonate until the pH is =10, reacting at room temperature for 32 hours, washing and centrifugally separating the obtained product for 3 times, and sucking out ferroferric oxide particles by a magnet. Adding calcium stearate into a clean round-neck flask, and modifying the ferroferric oxide particles for 48 hours to obtain magnetic super-hydrophobic ferroferric oxide particles;
step 2: sequentially adding absolute ethyl alcohol, ammonia water, deionized water and dopamine monomer into a clean single-neck flask, adjusting the pH value to 10, reacting at room temperature for 24 hours, washing a product with chloroform, centrifuging and drying to obtain polydopamine;
and 3, step 3: dispersing 2.5g of super-hydrophobic ferroferric oxide particles and 0.15g of polydopamine in 30g of 10wt.% calcium stearate solution, then soaking sponge (pretreatment: alternate cleaning with absolute ethyl alcohol and deionized water for 3 times and drying for later use) with the size of 2cm x 2cm x 2cm in the suspension, ultrasonically dispersing for 10min, modifying for 48h at room temperature, taking out the sponge, and heating for 160min at the temperature of 50 ℃ to obtain the magnetic response oil-water separation super-hydrophobic material.
Example 6
This example illustrates the preparation of the oil-water separation material with magnetic response provided by the present invention.
Step 1: adding ferric chloride hexahydrate and ferrous sulfate tetrahydrate in a mass ratio of 2:1 into a clean round-mouth flask in sequence, then dropwise adding ammonia water until the pH is =10, reacting for 12 hours at room temperature, washing and centrifugally separating the obtained product for 3 times, and sucking out ferroferric oxide particles by a magnet. Adding stearic acid alcohol into a clean round-neck flask, and modifying the ferroferric oxide particles for 48 hours to obtain magnetic super-hydrophobic ferroferric oxide particles;
step 2: sequentially adding absolute ethyl alcohol, ammonia water, deionized water and dopamine monomer into a clean single-neck flask, adjusting the pH value to 11, reacting at room temperature for 32 hours, washing a product with chloroform, centrifuging and drying to obtain polydopamine;
and 3, step 3: dispersing 3g of super-hydrophobic ferroferric oxide particles and 1.5g of polydopamine in 30g of 8wt.% stearic acid alcohol solution, then soaking sponge (pretreatment: washing for 3 times by using absolute ethyl alcohol and deionized water alternately and drying for later use) with the size of 2cm x 2cm x 2cm in the suspension, ultrasonically dispersing for 10min, modifying for 24h at room temperature, taking out the sponge, and heating for 120min at the temperature of 40 ℃ to obtain the magnetic response oil-water separation super-hydrophobic material.
Claims (5)
1. A preparation method of an oil-water separation material with magnetic response is characterized by comprising the following steps: the preparation method comprises the following steps:
step 1: preparation of super-hydrophobic ferroferric oxide particles
Adding ferric chloride hexahydrate and ferrous sulfate tetrahydrate into a solvent according to the mass ratio of 2:1, uniformly mixing, then dropwise adding a precipitator until the pH value is 10, reacting at room temperature for 6-48 hours, respectively washing and centrifugally separating the obtained product for three times, and then sucking out ferroferric oxide particles in the product by using a magnet;
adding the ferroferric oxide particles into a hydrophobic modifier, and stirring and modifying for 6-48 h to obtain magnetic super-hydrophobic ferroferric oxide particles;
step 2: preparation of polydopamine
Uniformly mixing absolute ethyl alcohol, ammonia water, deionized water and a dopamine monomer, adjusting the pH value to 7.5-11, stirring and reacting at room temperature for 12-56 hours, and washing, centrifuging and drying a product to obtain polydopamine;
and step 3: preparation of magnetic response oil-water separation super-hydrophobic material
Dispersing 0.1-3 g of super-hydrophobic ferroferric oxide particles and 0.1-3 g of polydopamine in 30g of 1-10 wt.% hydrophobic modifier solution to obtain a suspension of the super-hydrophobic ferroferric oxide particles;
and then soaking sponge with the size of 2cm multiplied by 2cm in the suspension, performing ultrasonic dispersion for 10min, modifying at room temperature for 2-48 h, taking out the sponge, and performing heating treatment at the temperature of 40-90 ℃ for 30-240 min to obtain the super-hydrophobic magnetic response oil-water separation material.
2. The preparation method of the oil-water separation material with magnetic response according to claim 1, characterized in that: the precipitant is one or more of sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, potassium bicarbonate, potassium hydroxide and ammonia water.
3. The preparation method of the oil-water separation material with magnetic response according to claim 1, characterized in that: the hydrophobic modifier is one or a mixture of more of isobutyl ester, potassium stearate, sodium stearate, zinc stearate, magnesium stearate, aluminum stearate, calcium stearate, fatty acid methyl ester, aluminum tripolyphosphate, epoxidized soybean oil and epoxidized fatty acid methyl ester.
4. The preparation method of the oil-water separation material with magnetic response according to claim 1, characterized in that: the solvent is one or a mixture of more of deionized water, acetone, absolute ethyl alcohol, toluene, xylene, ethyl acetate, dichloromethane, trichloromethane, tetrahydrofuran, diethyl ether, dioxane isopropanol, dimethyl sulfoxide, N-dimethylformamide and N, N-dimethylacetamide.
5. The preparation method of the oil-water separation material with magnetic response according to claim 1, characterized in that: the sponge is alternately cleaned for 3 times by absolute ethyl alcohol and deionized water and then dried.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759789A (en) * | 2020-12-31 | 2021-05-07 | 郑州峰泰纳米材料有限公司 | Melamine foam for oil-water separation |
| CN115672257A (en) * | 2022-11-08 | 2023-02-03 | 江西省润穹环保科技有限公司 | Preparation method of adsorbent for oil-water separation |
| CN116082864A (en) * | 2022-11-07 | 2023-05-09 | 杭州电子科技大学 | Preparation method and application of self-assembled functional coating based on low-surface-energy nano particles |
| CN117680099A (en) * | 2024-01-05 | 2024-03-12 | 辽宁石油化工大学 | Preparation and application of hydrophobic magnetic nano water treatment agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214630A (en) * | 2015-10-31 | 2016-01-06 | 仇颖超 | A kind of preparation method of super-hydrophobic magnetic polyurethane/ferriferrous oxide composite material |
| CN108841037A (en) * | 2018-07-19 | 2018-11-20 | 佛山皖阳生物科技有限公司 | A kind of preparation method of super-hydrophobic oil suction sponge |
| US20200033222A1 (en) * | 2017-03-06 | 2020-01-30 | Uti Limited Partnership | Device and method of manufacturing a device for detecting hydrocarbons |
| CN110898819A (en) * | 2019-12-09 | 2020-03-24 | 四川大学 | Magnetic porous nano-particles |
-
2020
- 2020-09-22 CN CN202010998572.9A patent/CN112090117A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214630A (en) * | 2015-10-31 | 2016-01-06 | 仇颖超 | A kind of preparation method of super-hydrophobic magnetic polyurethane/ferriferrous oxide composite material |
| US20200033222A1 (en) * | 2017-03-06 | 2020-01-30 | Uti Limited Partnership | Device and method of manufacturing a device for detecting hydrocarbons |
| CN108841037A (en) * | 2018-07-19 | 2018-11-20 | 佛山皖阳生物科技有限公司 | A kind of preparation method of super-hydrophobic oil suction sponge |
| CN110898819A (en) * | 2019-12-09 | 2020-03-24 | 四川大学 | Magnetic porous nano-particles |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759789A (en) * | 2020-12-31 | 2021-05-07 | 郑州峰泰纳米材料有限公司 | Melamine foam for oil-water separation |
| CN116082864A (en) * | 2022-11-07 | 2023-05-09 | 杭州电子科技大学 | Preparation method and application of self-assembled functional coating based on low-surface-energy nano particles |
| CN115672257A (en) * | 2022-11-08 | 2023-02-03 | 江西省润穹环保科技有限公司 | Preparation method of adsorbent for oil-water separation |
| CN117680099A (en) * | 2024-01-05 | 2024-03-12 | 辽宁石油化工大学 | Preparation and application of hydrophobic magnetic nano water treatment agent |
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Application publication date: 20201218 |