CN112442792A - Needled composite non-woven fabric for oil-water separation and preparation method thereof - Google Patents
Needled composite non-woven fabric for oil-water separation and preparation method thereof Download PDFInfo
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- CN112442792A CN112442792A CN201910740072.2A CN201910740072A CN112442792A CN 112442792 A CN112442792 A CN 112442792A CN 201910740072 A CN201910740072 A CN 201910740072A CN 112442792 A CN112442792 A CN 112442792A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
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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
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
-
- 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
- B01D17/04—Breaking emulsions
- B01D17/047—Breaking emulsions with separation aids
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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
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
- D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a needle-punched composite non-woven fabric for oil-water separation and a preparation method thereof, wherein the needle-punched composite non-woven fabric has a three-dimensional network structure and a curved channel aperture structure through mutual entanglement of hydrophilic fibers and lipophilic fibers in the preparation process, the probability that oil drops and suspended matters in the fluid collide and are retained in the pore structure can be greatly increased, and the oil stain is broken and captured in a bent channel of the needle-punched composite non-woven fabric by utilizing the capillary action of the surfaces, gaps and pores of the fibers and the absorption of the oil stain in a large pore space, thereby improving the separation efficiency of oil-water separation and the oil absorption capacity, and the needling composite non-woven fabric has better oil release performance by utilizing the difference of hydrophilic fiber and lipophilic fiber on the tension of oil-water interface, the needle-punched composite non-woven fabric can be washed and cleaned repeatedly, and the service life and the cleaning efficiency of the needle-punched composite non-woven fabric are improved.
Description
Technical Field
The invention relates to the technical field of oil-water separation materials, in particular to a needle-punched composite non-woven fabric for oil-water separation and a preparation method thereof.
Background
With the increasing global petroleum pollution problem, more and more oily wastewater has great influence on the environment, and the separation of oil/water mixed liquor becomes an important subject of theoretical and practical research worldwide.
The traditional oil-water separation method comprises gravity separation, flotation, coagulation, membrane filtration and the like, oil usually exists in the form of floating oil, dispersed oil, emulsified oil or tiny oil drops without stable surfactant, the size of the emulsified oil drops is usually less than 10 mu m, and the emulsified oil drops can stably exist in water for a long time, so that the traditional oil-water separation method is low in separation efficiency and is easy to generate secondary pollutants in the separation process.
In order to improve the separation efficiency of oil-water separation, the polymer membrane separation technology is developed as a novel separation technology, has simple treatment process, low energy consumption and convenient automatic control, and is widely applied to the fields of drinking water purification, wastewater treatment and material separation and extraction.
In the process of implementing the invention, the inventor finds that the related art has at least the following problems:
in the oil-water separation device provided by the related technology, the polymer film playing a role of oil-water separation core is easily polluted by pollutants in a long-term use process, so that the oil-water separation efficiency of the polymer film is gradually reduced, the service life of the polymer film is relatively short, and the pollutants attached to the waste polymer film easily cause secondary pollution to the environment.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a needle-punched composite non-woven fabric for oil-water separation and a preparation method thereof.
According to a first aspect of embodiments of the present invention, there is provided a method of manufacturing a needle-punched composite nonwoven fabric for oil-water separation, the method including:
mixing hydrophilic fibers and oleophilic fibers according to the mixing ratio of 1:9-4:6 to obtain mixed fibers, wherein the length of the hydrophilic fibers is 33-38mm, the fineness of the hydrophilic fibers is 0.1332-0.1665tex, and the length of the oleophilic fibers is 51-76mmn, and the fineness of the oleophilic fibers is 0.222-0.333 tex;
and (3) after opening the mixed fibers, sending the mixed fibers into a roller carding machine for carding, wherein the parameters of the carding process comprise: the roller spacing is 0.2-0.4mm, and the carding speed is 60-100 m/min;
crossing lapping is carried out on the carded mixed fibers to obtain a composite fiber web, and the density of the composite fiber web is 300-500g/m2；
After the composite fiber net is subjected to needling reinforcement, the net is reinforced through entanglement among fibers, and the needled composite non-woven fabric for oil-water separation is prepared, wherein the parameters of the needling reinforcement process comprise: the needle density of the pre-needling machine is 2000-; the needle implantation density of the first and second main needle plate is 4000-.
In a preferred embodiment, the oil-water separation needle-punched composite non-woven fabric is a cleanable material, and the oil-water separation needle-punched composite non-woven fabric is subjected to backwashing treatment in a water-gas mixing mode when the filtration resistance reaches 0.6MPa, wherein the backwashing strength is 5-15L/s m2。
In a preferred embodiment, the hydrophilic fibers are cellulose-based fibers.
In a preferred embodiment, the oleophilic fibers are medium-length fibers.
In a preferred embodiment, the density of the needle-punched composite non-woven fabric for oil-water separation is 100-200g/m2The air permeability is 30-50L/(m)2S) contact angle of 110-.
In a preferred embodiment, the oil-water separating needle-punched composite nonwoven fabric has a three-dimensional network structure and a tortuous path pore size structure.
According to a second aspect of the embodiment of the present invention, there is provided a needle-punched composite nonwoven fabric for oil-water separation, which is produced by the method for producing a needle-punched composite nonwoven fabric for oil-water separation according to any one of claims 1 to 6, and which is produced by combining hydrophilic fibers and lipophilic fibers at a mixing ratio of 1:9 to 4: 6.
Compared with the prior art, the needle-punched composite non-woven fabric for oil-water separation and the preparation method thereof provided by the invention have the following advantages:
the invention provides a needle-punched composite non-woven fabric for oil-water separation and a preparation method thereof, the needle-punched composite non-woven fabric has a three-dimensional network structure and a curved channel aperture structure through mutual entanglement of hydrophilic fibers and lipophilic fibers in the preparation process, the probability that oil drops and suspended matters in the fluid collide and are retained in the pore structure can be greatly increased, and the oil stain is broken and captured in a bent channel of the needle-punched composite non-woven fabric by utilizing the capillary action of the surfaces, gaps and pores of the fibers and the absorption of the oil stain in a large pore space, thereby improving the separation efficiency of oil-water separation and the oil absorption capacity, and the needling composite non-woven fabric has better oil release performance by utilizing the difference of hydrophilic fiber and lipophilic fiber on the tension of oil-water interface, the needle-punched composite non-woven fabric can be washed and cleaned repeatedly, and the service life and the cleaning efficiency of the needle-punched composite non-woven fabric are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a method flowchart illustrating a method of manufacturing a needle-punched composite nonwoven fabric for oil-water separation according to an exemplary embodiment.
FIG. 2 is a graph illustrating a batch of oil content in the water separation inlet and outlet of wastewater according to an exemplary embodiment.
Detailed Description
The present invention is described in detail below with reference to specific embodiments (but not limited to) and the accompanying drawings, the specific method of the embodiments is only for illustrating the invention, the scope of the invention is not limited by the embodiments, the invention can be applied to various modifications and changes of shape and structure, and these equivalents based on the invention are also within the scope of the claims of the present invention.
Fig. 1 is a method flowchart illustrating a method for manufacturing a needle-punched composite nonwoven fabric for oil-water separation according to an exemplary embodiment, where, as shown in fig. 1, the method for manufacturing the needle-punched composite nonwoven fabric for oil-water separation includes steps 100 to 400, which include:
step 100: mixing hydrophilic fiber and oleophilic fiber according to the mixing ratio of 1:9-4:6 to obtain mixed fiber, wherein the length of the hydrophilic fiber is 33-38mm, the fineness is 0.1332-0.1665tex, and the length of the oleophilic fiber is 51-76mmn, and the fineness is 0.222-0.333 tex.
Step 200: and (3) after opening the mixed fibers, sending the mixed fibers into a roller carding machine for carding, wherein the parameters of the carding process comprise: the roller spacing is 0.2-0.4mm, and the carding speed is 60-100 m/min.
Step 300: crossing lapping is carried out on the carded mixed fibers to obtain a composite fiber web, and the density of the composite fiber web is 300-500g/m2。
Step 400: after the composite fiber net is subjected to needling reinforcement, the net is reinforced through entanglement among fibers, and the needled composite non-woven fabric for oil-water separation is prepared, wherein the parameters of the needling reinforcement process comprise: the needle density of the pre-needling machine is 2000-; the needle implantation density of the first and second main needle plate is 4000-.
In a preferred embodiment, the oil-water separation needle-punched composite non-woven fabric is a cleanable material, and the oil-water separation needle-punched composite non-woven fabric is subjected to backwashing treatment in a water-gas mixing mode when the filtration resistance reaches 0.2MPa, wherein the backwashing strength is 5-15L/s m2。
According to the invention, the hydrophilic fiber and the lipophilic fiber are different in oil-water interfacial tension, so that the prepared needle-punched composite non-woven fabric for oil-water separation has oil pollution resistance, and can be cleaned by backwashing, and thus the needle-punched composite non-woven fabric for oil-water separation can be reused after adsorbing a large amount of oil stains, and the service life and the service efficiency of the needle-punched composite non-woven fabric for oil-water separation are improved.
In a preferred embodiment, the hydrophilic fibers are cellulose-based fibers.
In a preferred embodiment, the oleophilic fibers are medium-length fibers.
In a preferred embodiment, the density of the needle-punched composite non-woven fabric for oil-water separation is 100-200g/m2The air permeability is 30-50L/(m)2S) contact angle of 110-.
In a preferred embodiment, the oil-water separating needle-punched composite nonwoven fabric has a three-dimensional network structure and a tortuous path pore size structure.
The oil content of the sewage which can be treated by the needle-punched composite non-woven fabric for oil-water separation provided by the invention is wide, the upper limit of the oil content of the sewage can reach 20000mg/L, and the content of dispersed oil, emulsified oil and dissolved oil with small particle size in the sewage entering a filter bed can reach 100 mg/L.
In conclusion, the invention provides a needle-punched composite non-woven fabric for oil-water separation and a preparation method thereof, the needling composite non-woven fabric has a three-dimensional network structure and a curved channel aperture structure through the mutual entanglement of hydrophilic fibers and lipophilic fibers in the preparation process, the probability that oil drops and suspended matters in the fluid collide and are retained in the pore structure can be greatly increased, and the oil stain is broken and captured in a bent channel of the needle-punched composite non-woven fabric by utilizing the capillary action of the surfaces, gaps and pores of the fibers and the absorption of the oil stain in a large pore space, thereby improving the separation efficiency of oil-water separation and the oil absorption capacity, and the needling composite non-woven fabric has better oil release performance by utilizing the difference of hydrophilic fiber and lipophilic fiber on the tension of oil-water interface, the needle-punched composite non-woven fabric can be washed and cleaned repeatedly, and the service life and the cleaning efficiency of the needle-punched composite non-woven fabric are improved.
To better illustrate the beneficial effects of the needle-punched composite nonwoven fabric for oil-water separation and the preparation method thereof provided by the embodiments of the present invention, embodiments 1-2 are shown, wherein the specific process flows and parameters of the embodiments are as follows:
example 1
Case (2):
some oil company transfer station thick oil produced water (crude oil density 0.946 kg/m)3And the viscosity is 1500mp.s), wherein when the water and oil contents of the material in the water inlet fluctuate within the range of 185.5-6572mg/L, the needle-punched composite non-woven fabric for oil-water separation provided by the invention is adopted for oil-water separation treatment, and the requirement that the oil-removed material reaches the stratum reinjection standard is met.
Scheme selection:
(1) according to the following steps of 3: 7, and mixing hydrophilic fibers and oleophilic fibers to obtain mixed fibers, wherein the length of the hydrophilic fibers is 33mm, the fineness of the hydrophilic fibers is 0.1660tex, and the length of the oleophilic fibers is 51mmn, and the fineness of the oleophilic fibers is 0.222 tex.
(2) And (3) after opening the mixed fibers, sending the mixed fibers into a roller carding machine for carding, wherein the parameters of the carding process comprise: the roller spacing was 0.4mm and the carding speed was 80 m/min.
(3) Carrying out crossed lapping on the carded mixed fibers to obtain a composite fiber web, wherein the density of the composite fiber web is 300g/m2。
(4) After the composite fiber net is subjected to needling reinforcement, the net is reinforced through entanglement among fibers, and the needled composite non-woven fabric for oil-water separation is prepared, wherein the parameters of the needling reinforcement process comprise: the needle density of the pre-needling machine is 2000 pieces/m, and the needling frequency is 400 needles/min; the needle density of the needle plate of the first main needle and the second main needle is 4000 per meter, and the needle punching frequency is 700 punches per min.
The prepared needle-punched composite non-woven fabric for oil-water separation has the fiber web surface density of 300g/m2The oil content of the effluent can be stably controlled to be less than or equal to 20 mg/L.
Example 2
Case (2):
some oil company transfer station thick oil produced water (crude oil density 0.95 kg/m)3And the viscosity of 7500mp.s), wherein when the water and oil contents of the material fluctuate within the range of 50-1148mg/L, the needle-punched composite non-woven fabric for oil-water separation provided by the invention is adopted for oil-water separation treatment, and the oil-water separation is required to reach the discharge standard after oil removal.
Scheme selection:
(1) according to the following steps: 8, mixing hydrophilic fibers and oleophilic fibers to obtain mixed fibers, wherein the length of the hydrophilic fibers is 35mm, the fineness of the hydrophilic fibers is 0.1450tex, and the length of the oleophilic fibers is 60mmn, and the fineness of the oleophilic fibers is 0.332 tex.
(2) And (3) after opening the mixed fibers, sending the mixed fibers into a roller carding machine for carding, wherein the parameters of the carding process comprise: the roller spacing was 0.5mm and the carding speed was 100 m/min.
(3) Carrying out crossed lapping on the carded mixed fibers to obtain a composite fiber web, wherein the density of the composite fiber web is 300g/m2。
(4) After the composite fiber net is subjected to needling reinforcement, the net is reinforced through entanglement among fibers, and the needled composite non-woven fabric for oil-water separation is prepared, wherein the parameters of the needling reinforcement process comprise: the planting needle density of the pre-needling machine is 2500 pieces/m, and the needling frequency is 500 pieces/min; the needle density of the needle plate of the first main needle and the second main needle is 4500 pieces/m, and the needle punching frequency is 800 pieces/min.
The prepared needle-punched composite non-woven fabric for oil-water separation has the fiber web surface density of 500g/m2The oil content of the effluent can be stably controlled to be less than or equal to 0.6-2.4 mg/L.
It should be noted that the invention also provides a batch curve graph of the oil content in the oil-water separation inlet and outlet in the sewage, which is practically applied to the oil-water separation operation, of the needled composite nonwoven fabric for oil-water separation, as shown in fig. 2, obviously, the needled composite nonwoven fabric for oil-water separation provided by the invention has strong oil absorption performance.
While the invention has been described in detail in the foregoing by way of general description, and specific embodiments and experiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof.
Claims (7)
1. A preparation method of a needle-punched composite nonwoven fabric for oil-water separation is characterized by comprising the following steps:
mixing hydrophilic fibers and oleophilic fibers according to the mixing ratio of 1:9-4:6 to obtain mixed fibers, wherein the length of the hydrophilic fibers is 33-38mm, the fineness of the hydrophilic fibers is 0.1332-0.1665tex, and the length of the oleophilic fibers is 51-76mmn, and the fineness of the oleophilic fibers is 0.222-0.333 tex;
and (3) after opening the mixed fibers, sending the mixed fibers into a roller carding machine for carding, wherein the parameters of the carding process comprise: the roller spacing is 0.2-0.4mm, and the carding speed is 60-100 m/min;
crossing lapping is carried out on the carded mixed fibers to obtain a composite fiber web, and the density of the composite fiber web is 300-500g/m2；
After the composite fiber net is subjected to needling reinforcement, the net is reinforced through entanglement among fibers, and the needled composite non-woven fabric for oil-water separation is prepared, wherein the parameters of the needling reinforcement process comprise: the needle density of the pre-needling machine is 2000-; the needle implantation density of the first and second main needle plate is 4000-.
2. The method according to claim 1, wherein the needle-punched composite nonwoven fabric for oil-water separation is a cleanable material, and the needle-punched composite nonwoven fabric for oil-water separation is subjected to backwashing treatment with water-gas mixture at a filtration resistance of 0.2MPa, and has a backwashing strength of 5 to 15L/s m2。
3. The method of claim 1, wherein the hydrophilic fibers are cellulose-based fibers.
4. The method of claim 1, wherein said oleophilic fibers are medium length fibers.
5. The method as claimed in claim 1, wherein the needle-punched composite nonwoven fabric for oil-water separation has a density of 100-200g/m2The air permeability is 30-50L/(m)2S) contact angle with water of 110-.
6. The method according to claim 1, wherein the oil-water separating needle-punched composite nonwoven fabric has a three-dimensional network structure and a tortuous path pore size structure.
7. A needled composite nonwoven fabric for oil-water separation, which is produced by the method for producing a needled composite nonwoven fabric for oil-water separation according to any one of claims 1 to 6, and which is produced from hydrophilic fibers and lipophilic fibers at a mixing ratio of 1:9 to 4: 6.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113668141A (en) * | 2021-08-25 | 2021-11-19 | 青岛大学 | Preparation method of super-hydrophilic oleophylic fiber membrane for kitchen |
| CN114347625A (en) * | 2021-12-27 | 2022-04-15 | 嘉兴华丽非织布制品有限公司 | Preparation method of oil-water separation felt |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786272A (en) * | 2018-06-11 | 2018-11-13 | 佛山市陵谐环保科技有限公司 | A kind of preparation method of non-woven fabric compounded fuel oil filter material |
-
2019
- 2019-08-12 CN CN201910740072.2A patent/CN112442792A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786272A (en) * | 2018-06-11 | 2018-11-13 | 佛山市陵谐环保科技有限公司 | A kind of preparation method of non-woven fabric compounded fuel oil filter material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113668141A (en) * | 2021-08-25 | 2021-11-19 | 青岛大学 | Preparation method of super-hydrophilic oleophylic fiber membrane for kitchen |
| CN113668141B (en) * | 2021-08-25 | 2023-07-04 | 青岛大学 | Preparation method of super-hydrophilic and lipophilic fibrous membrane for kitchen |
| CN114347625A (en) * | 2021-12-27 | 2022-04-15 | 嘉兴华丽非织布制品有限公司 | Preparation method of oil-water separation felt |
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