CN108939692A - A kind of super-hydrophobic coat and preparation method thereof for water-oil separating - Google Patents
A kind of super-hydrophobic coat and preparation method thereof for water-oil separating Download PDFInfo
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- CN108939692A CN108939692A CN201810862903.9A CN201810862903A CN108939692A CN 108939692 A CN108939692 A CN 108939692A CN 201810862903 A CN201810862903 A CN 201810862903A CN 108939692 A CN108939692 A CN 108939692A
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- Prior art keywords
- super
- water
- hydrophobic coat
- rilanit special
- oil separating
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/10—Filter screens essentially made of metal
- B01D39/12—Filter screens essentially made of metal of wire gauze; of knitted wire; of expanded metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
- B01D2239/0428—Rendering the filter material hydrophobic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0471—Surface coating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/003—Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms
Abstract
The super-hydrophobic coat and preparation method thereof that the invention discloses a kind of for water-oil separating, belongs to technical field of chemical separation.The hydrophobic coating utilizes the rilanit special hydrophobic material nontoxic to environment, the method impregnated by solution, industrial filter cloth and strainer fiber surface are impregnated into rilanit special ethanol solution, obtain super-hydrophobic coat, and utilize the super-hydrophobicity and super-oleophilic of the coating, the water-oil separating for realizing low energy consumption, oil-based liquid yield is greater than 99% after separation.
Description
Technical field
The super-hydrophobic coat and preparation method thereof that the present invention relates to a kind of for water-oil separating belongs to chemical separation technology neck
Domain.
Background technique
In recent years, with the increase of Organic Ingredients leakage accident industrial in world wide and the increasing of people's environmental consciousness
By force, organic wastewater from lab, remaining meal waste oil, the management of oil-containing industrial water and processing requirement are increasingly improved.Due to largely containing
Oily liquid debris is existed with the state of oil water mixture, and the separation method with conventional distil-lation, extraction is often time-consuming and laborious, very
To because of huge energy consumption, bigger burden is brought to our ecological environment.
Super hydrophobic material has been widely used in water-oil separating material due to hydrophobicity with super strength itself and lipophilicity
Material.Discarded organic liquid, the poisonous and harmful organic liquid being especially suspended in water, need not move through the centrifugation of high energy consumption, extraction,
Distillation equipment need to can only be separated, by recycling, in source by being simply separated by filtration from a large amount of water body
The discharge for reducing organic pollutant on head greatly reduces social common waste water waste processing cost, constructs and can hold to pushing
The Ecological Society of supervention exhibition has positive meaning.Although the research at present by super hydrophobic material building water-oil separating material is very wide
General, a large amount of patents are disclosed report, such as patent CN104805420A, CN104725599A etc..A large amount of super-hydrophobic oil at present
Water separation material needs complicated step during the preparation process or special sulfur-bearing or fluorochemical is added to increase material table
On the one hand the hydrophobicity in face, these methods will increase the processing cost of material, on the other hand due to sulfur-bearing or fluorochemical
Using can also bring certain potential danger to environment.Develop a kind of low cost, and the super-hydrophobic grease of environmental sound point
It is a urgent social demand from material.
Rilanit special derives from natural castor oil, itself is a kind of vegetable wax, has certain hydrophobicity, sheet
Solid is about 115 ° or so to the static contact angle of water droplet.Rilanit special is often used as pharmaceutic adjuvant, rise in the formulation thickening,
The effects of hardening and sustained release, therefore it is used as thickener, hardening agent and sustained release agent, it is used to prepare semisolid preparation and solid pharmaceutical preparation, such as
Ointment, suppository, pill, tablet etc..
Summary of the invention
The object of the present invention is to provide a kind of to prepare super-hydrophobic material with lower cost and with the material of environmental sound
The method of material.
Present invention technical problems to be solved first are to provide a kind of preparation side of super-hydrophobic coat for water-oil separating
Method, the preparation process of the super-hydrophobic spherocrystal coating of the present invention as shown in Figure 1, method particularly includes: rilanit special ethanol solution is passed through
Infusion process is crossed coated on filter cloth or strainer, dipping temperature is 40-50 DEG C, and filter cloth or strainer are in rilanit special ethanol solution
After complete wetting, taking-up is drying to obtain super-hydrophobic coat.
Further, the mass concentration of the rilanit special ethanol solution is 4%-11%, preferably 4%-8%.
Further, the filter cloth is cotton filter cloth, chemical fibre filter cloth.
Further, the strainer is stainless steel filtering net, copper strainer, iron strainer, nylon leaching net.
Further, the drying mode is naturally dry or vacuum drying.
The super-hydrophobic coat being prepared according to the above method, wherein the rilanit special exists in the form of spherocrystal,
The water static contact angle of super-hydrophobic coat is greater than 150 °.
Another object of the present invention is application of the super-hydrophobic coat of water-oil separating in water-oil separating.
The super-hydrophobic coat separation n-hexane and water, atoleine and water that are prepared with the present invention, edible oil and water, just
The mixture of octane and water, wherein n-hexane, atoleine, edible oil, normal octane yield be all larger than 99%, and repeat point
From 30-50 times, coating surface still maintains super-hydrophobicity.
Beneficial effects of the present invention:
(1) rilanit special is used in super hydrophobic material by the present invention for the first time, when it is made into the covering of spherulitic crystal structure coating
When on filter cloth or strainer, 150 ° or more can be risen to the static contact angle of water droplet, become a kind of super hydrophobic material；?
To super hydrophobic material in the case where no mechanical force is destroyed, multiple water-oil separating operation can be carried out, without damaging.In its coating
After being damaged, it can be impregnated again in the rilanit special ethanol solution of heat, dry, super-hydrophobic coat can be regained.
(2) super-hydrophobic spherocrystal coating of the present invention has nontoxic to environment, biodegradable, is easy to repair
Characteristic.
The common filter cloth and strainer covered is used for laboratory waste liquid containing organic compound, aqueous remaining meal waste oil, oil-containing
The water-oil separating of industrial wastewater etc. can reduce social common waste water waste processing cost from source, environmental-friendly to promoting
The preferable facilitation of water-oil separating material.
Detailed description of the invention
The preparation process of the super-hydrophobic spherocrystal coating of Fig. 1.
The optical microscope image and sem image of Fig. 2 (a), (d) stainless steel mesh surface spherocrystal coating, (b), (e),
(f) sem image of single spherocrystal, (c) form of the water droplet on stainless steel mesh surface.
Fig. 3 is equipped with the oily-water seperating equipment of stainless steel filtering net.
The sem image of Fig. 4 (a), (b) industrial 747 polyester fiber filter cloth surface super-hydrophobic coats, (c) single spherocrystal table
Face sem image, (d) shape of the water droplet on the 747 industrial filter cloth surfaces that super-hydrophobic coat covers.
Before Fig. 5 (a) atoleine is separated with water mixed liquid, after (b) atoleine is separated with water mixed liquid.
Fig. 6 (a), (b), (c), (d), (e), (f), (h), (i) super-hydrophobic coat nylon leaching net surface form, (g)
Shape of the water droplet on the nylon leaching net surface for being covered with super-hydrophobic coat.
Specific embodiment
Embodiment 1
A kind of super-hydrophobic coat for water-oil separating, preparation process are as follows:
It weighs 5 grams of rilanit special heating and is dissolved in 95 grams of dehydrated alcohols obtained 5% rilanit special ethanol solution, keep
Solution temperature is at 45 DEG C, and by 400 mesh stainless steel filtering nets, complete wetting, taking-up are flat on clean glass plate and dry in the air in the solution
The dry stainless steel filtering net covered to get super-hydrophobic coat.The visible Fig. 2 of screen surface form, the Static Contact of screen surface water droplet
Angle is 155.5 °, and n-hexane is in screen surface contact angle~0 °.Each 20ml mixture of n-hexane, water can be by Fig. 3 device at 5 points
Separation finishes in clock, and n-hexane yield is 99.6% after separation, repeated isolation the mixture 50 times, measures screen surface water droplet
Static contact angle, contact angle is reduced to 153.1 °, and coating surface still keeps super-hydrophobicity.
Embodiment 2
A kind of super-hydrophobic coat for water-oil separating, preparation process are as follows:
It weighs 8 grams of rilanit special heating and is dissolved in 92 grams of dehydrated alcohols obtained 8% rilanit special ethanol solution, keep
Solution temperature is at 50 DEG C, and by industrial 747 polyester fiber filter clothes, complete wetting, taking-up are flat on clean glass plate in the solution
Dry the filter cloth to get super-hydrophobic coat covering.The visible Fig. 4 of filter cloth surface form, the static contact angle of screen surface water droplet are
156.5 °, atoleine is in filter cloth surface contact angle~0 °.Each 20ml mixture of atoleine, water can be by funnel (Fig. 5) 5
Separation finishes in minute, and atoleine yield is 99.5% after separation, repeated isolation the mixture 30 times, measures filter cloth surface
The static contact angle of water droplet, contact angle are reduced to 155.3 °, and coating surface still keeps super-hydrophobicity.
Embodiment 3
A kind of super-hydrophobic coat for water-oil separating, preparation process are as follows:
It weighs 4 grams of rilanit special heating and is dissolved in 96 grams of dehydrated alcohols obtained 4% rilanit special ethanol solution, keep
Solution temperature is at 40 DEG C, by 200 mesh nylon leaching nets complete wetting in the solution, takes out to be flat on clean glass plate and dry,
Up to the nylon leaching net of super-hydrophobic coat covering.The visible Fig. 6 of screen surface form, the static contact angle of screen surface water droplet are
155.6 °, edible oil is in nylon leaching net surface contact angle~0 °.By edible oil, each 20ml mixture of water by being stamped nylon leaching net
Funnel separation, in 5 minutes separation finish, after separation edible oil yield be 99.6%, repeated isolation the mixture 50 times,
The static contact angle of filter cloth surface water droplet is measured, contact angle is reduced to 152.5 °, and coating surface still keeps super-hydrophobicity.
Embodiment 4
A kind of super-hydrophobic coat for water-oil separating, preparation process are as follows:
It weighs 10 grams of rilanit special heating and is dissolved in 90 grams of dehydrated alcohols obtained 10% rilanit special ethanol solution, protect
Solution temperature is held at 50 DEG C, by cotton filter cloth complete wetting in the solution, takes out to be flat on clean glass plate and dry to get super
The filter cloth of hydrophobic coating covering.The static contact angle of filter cloth surface water droplet be 156.5 °, normal octane filter cloth surface contact angle~
0°.Normal octane, each 20ml mixture of water can be separated by being stamped the funnel of cotton filter cloth, separation finishes in 5 minutes, after separation
Normal octane yield is 99.4%.
Comparative example 1: the selection (non-alcohol solvent) of solvent
It weighs 8 grams of rilanit special heating and is dissolved in 92 grams of chloroforms obtained 8% rilanit special chloroformic solution, keep solution
Temperature is at 50 DEG C, and by industrial 747 polyester fiber filter clothes, complete wetting, taking-up are flat on clean glass plate and dry in the air in the solution
Dry, the static contact angle of obtained filter cloth surface water droplet is 137.2 °, less than 150 °, does not obtain super hydrophobic material.
Comparative example 2: concentration 3%
It weighs 3 grams of rilanit special heating and is dissolved in 97 grams of dehydrated alcohols obtained 3% rilanit special ethanol solution, keep
Solution temperature is between 40 DEG C, and by 200 mesh nylon screens, complete wetting, taking-up are flat on clean glass plate and dry in the air in the solution
Dry, the static contact angle of obtained filter cloth surface water droplet is 140.5 °, less than 150 °, does not obtain super hydrophobic material.
Comparative example 3: concentration 12%
It weighs 12 grams of rilanit special heating and is dissolved in 88 grams of dehydrated alcohols obtained 12% rilanit special ethanol solution, protect
Solution temperature is held between 50 DEG C, complete wetting, taking-up are flat on clean glass plate and dry in the air in the solution by cotton filter cloth materials
Dry, the static contact angle of obtained filter cloth surface water droplet is 148.5 °, less than 150 °, does not obtain super hydrophobic material.
Comparative example 4: temperature is 60 DEG C
It weighs 5 grams of rilanit special heating and is dissolved in 95 grams of dehydrated alcohols obtained 5% rilanit special ethanol solution, keep
Solution temperature filters complete wetting in the solution at 60 DEG C, by 400 mesh stainless steels, takes out to be flat on clean glass plate and dry,
The static contact angle of obtained filter cloth surface water droplet is 135.7 °, less than 150 °, does not obtain super hydrophobic material.
Although the present invention has been described by way of example and in terms of the preferred embodiments, it is not intended to limit the invention, any to be familiar with this skill
The people of art can do various change and modification, therefore protection model of the invention without departing from the spirit and scope of the present invention
Enclosing subject to the definition of the claims.
Claims (10)
1. a kind of preparation method of the super-hydrophobic coat for water-oil separating, which is characterized in that the method is by rilanit special
Ethanol solution is coated on filter cloth or strainer by infusion process, and dipping temperature is 40-50 DEG C, and filter cloth or strainer are in rilanit special
In ethanol solution after complete wetting, taking-up is drying to obtain super-hydrophobic coat.
2. a kind of preparation method of super-hydrophobic coat for water-oil separating according to claim 1, which is characterized in that institute
The mass concentration for stating rilanit special in rilanit special ethanol solution is 4%-11%.
3. a kind of preparation method of super-hydrophobic coat for water-oil separating according to claim 1, which is characterized in that institute
The mass concentration for stating rilanit special in rilanit special ethanol solution is 4%-8%.
4. a kind of preparation method of super-hydrophobic coat for water-oil separating according to claim 1 to 3, feature
It is, the filter cloth is cotton filter cloth, chemical fibre filter cloth.
5. a kind of preparation method of super-hydrophobic coat for water-oil separating according to claim 1 to 4, feature
It is, the strainer is stainless steel filtering net, copper strainer, iron strainer, nylon leaching net.
6. a kind of -5 any preparation methods of the super-hydrophobic coat for water-oil separating are prepared according to claim 1
Super-hydrophobic coat.
7. super-hydrophobic coat according to claim 6, which is characterized in that the rilanit special is deposited in the form of spherocrystal
?.
8. super-hydrophobic coat according to claim 6 or 7, which is characterized in that the water Static Contact of the super-hydrophobic coat
Angle is greater than 150 °.
9. super-hydrophobic coat as claimed in claim 6 to 8 is in the application of water-oil separating, chemical industry and medicine and other fields.
10. application of the rilanit special in super hydrophobic material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862903.9A CN108939692B (en) | 2018-08-01 | 2018-08-01 | A kind of super-hydrophobic coat and preparation method thereof for water-oil separating |
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| CN201810862903.9A CN108939692B (en) | 2018-08-01 | 2018-08-01 | A kind of super-hydrophobic coat and preparation method thereof for water-oil separating |
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| CN108939692A true CN108939692A (en) | 2018-12-07 |
| CN108939692B CN108939692B (en) | 2019-08-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112900081A (en) * | 2021-02-02 | 2021-06-04 | 天津大学 | Hydrophobic spherulite, hydrophobic material, hydrophobic composite material, Janus composite material, and preparation methods and applications thereof |
| CN112921643A (en) * | 2021-01-26 | 2021-06-08 | 西安理工大学 | ZrO (ZrO)2Preparation method of @ PET fiber oil-water separation material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103766415A (en) * | 2012-10-17 | 2014-05-07 | 天津市中科健新材料技术有限公司 | Herbal antiseptic containing chitosan |
| CN104523490A (en) * | 2014-12-11 | 2015-04-22 | 广州栋方日化有限公司 | Exfoliate composition with whitening and moisturizing effects and preparation method of exfoliate composition |
-
2018
- 2018-08-01 CN CN201810862903.9A patent/CN108939692B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103766415A (en) * | 2012-10-17 | 2014-05-07 | 天津市中科健新材料技术有限公司 | Herbal antiseptic containing chitosan |
| CN104523490A (en) * | 2014-12-11 | 2015-04-22 | 广州栋方日化有限公司 | Exfoliate composition with whitening and moisturizing effects and preparation method of exfoliate composition |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921643A (en) * | 2021-01-26 | 2021-06-08 | 西安理工大学 | ZrO (ZrO)2Preparation method of @ PET fiber oil-water separation material |
| CN112900081A (en) * | 2021-02-02 | 2021-06-04 | 天津大学 | Hydrophobic spherulite, hydrophobic material, hydrophobic composite material, Janus composite material, and preparation methods and applications thereof |
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| Publication number | Publication date |
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| CN108939692B (en) | 2019-08-20 |
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