CN109621736A - It is coated porous and its preparation method and application - Google Patents
It is coated porous and its preparation method and application Download PDFInfo
- Publication number
- CN109621736A CN109621736A CN201811435794.9A CN201811435794A CN109621736A CN 109621736 A CN109621736 A CN 109621736A CN 201811435794 A CN201811435794 A CN 201811435794A CN 109621736 A CN109621736 A CN 109621736A
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- Prior art keywords
- coated porous
- coating
- ceramic powders
- range
- binder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/022—Metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/04—Glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/28—Polymers of vinyl aromatic compounds
Abstract
The present invention provides a kind of coated porous and its preparation method and application with excellent specific surface area and filter efficiency, it includes ceramic powders and binder as component that this is coated porous, it is described it is coated porous in be distributed with nanoaperture of the average diameter in 1-5nm in the range of, and described coated porous have in 1200-2000m2Specific surface area in the range of/g.
Description
Technical field
It is coated porous and its preparation method and application the present invention relates to one kind.
Background technique
Current environmental pollution is increasingly severe, such as water pollution and air pollution, has become serious social concern.It is more
Porous materials with high specific surface area in terms of reply water pollution and air pollution due to having a wide range of applications.Specifically,
Porous material has been widely used as the dirt that filter medium was for example used in drainage or other liquid as filtering membrane of filter
Dye object or the pollutant being used in air filtering as mask filter disc.However, there are manufacturing process ratios for current filter medium
More complex, specific surface area is restricted, and the problem that filter efficiency is not high, it is therefore desirable to which exploitation has excellent specific surface area
With the coated porous new process of filter efficiency.
Summary of the invention
The object of the present invention is to provide a kind of with the coated porous of excellent specific surface area and filter efficiency and its prepares
Methods and applications.
In order to achieve the above object, the present invention the following technical schemes are provided:
<1>a kind of coated porous, it includes ceramic powders and binders as component, it is described it is coated porous in be distributed with
Nanoaperture of average diameter in the range of 1-5nm, and it is described coated porous in 1200-2000m2In the range of/g
Specific surface area.
<2>coated porous according to<1>, wherein the ceramic powders be selected from metal oxide, metal nitride or
Their combination.
<3>coated porous according to<1>or<2>, wherein the weight ratio of the ceramic powders and the binder exists
In the range of 7-9:1-3.
<4>a kind of to be used to prepare coated porous method, it the described method comprises the following steps:
Pore creating material and ceramic powders are added in binder to form slurry；
By slurry coating to obtain coating in substrate；
By the coating drying so that the pore creating material is thermally decomposed, to obtain described coated porous.
<5>method according to<4>, wherein the pore creating material is in Ammonium bicarbonate food grade, oxalic acid, ammonium carbonate and ammonium nitrate
One kind or their combination.
<6>method according to<4>or<5>, wherein the pore creating material accounts for the 0.5-2 weight % of the slurry.
<7>method according to any one of<4>to<6>, wherein the ceramic powders are selected from metal oxide,
Metal nitride or their combination.
<8>method according to any one of<4>to<7>, wherein the weight of the ceramic powders and the binder
Than in the range of 7-9:1-3.
<9>method according to any one of<4>to<8>, wherein in temperature range being 45-75 DEG C by the coating
It is successively dried in the continuous drying section of multiple temperature increments.
<10>the coated porous purposes as filter medium according to any one of<1>to<3>.
Beneficial effect
According to the present invention, pore creating material has been used during preparing coated porous, pore creating material at the process conditions can be with
Gas such as carbon dioxide is decomposed and generates, to form microcosmic pore structure inside film, this considerably increases films
Specific surface area, this is coated porous to can have excellent filter efficiency as filter medium.
Specific embodiment
It is according to the present invention it is coated porous comprising ceramic powders and binder as component, in the coated porous middle distribution
There is nanoaperture of average diameter in the range of 1-5nm, and described coated porous in 1200-2000m2The range of/g
Interior specific surface area.In the range of the preferred 2-3nm of the average diameter of hole.The coated porous porosity preferably with 45-60%.
It is described coated porous preferably in 1500-1800m2Specific surface area in/g range.
According to the present invention, coated porous thickness can be in the range of 2-8 μm.As needed, described coated porous
Other components such as plasticizer, stabilizer etc. can also be included.
In coated porous embodiment of the invention, the ceramic powders can be selected from metal oxide, metal nitrogen
Compound or their combination.The metal oxide can be selected from aluminium oxide, silica, calcium oxide, zirconium oxide, nickel oxide, oxygen
Change titanium, copper oxide or other divalent state metal oxides or their combination.The metal nitride can selected from silicon nitride or
Aluminium nitride etc. and their combination.
In coated porous embodiment of the invention, the weight ratio of the ceramic powders and the binder can be
In the range of 7-9:1-3.
It is according to the present invention be used to prepare coated porous method the following steps are included:
Pore creating material and ceramic powders are added in binder to form slurry；
By slurry coating to obtain coating in substrate；
By the coating drying so that the pore creating material is thermally decomposed, to obtain described coated porous.
According to the present invention, the method also includes removing substrate.
According to the present invention, there is no any restrictions to base material.Base material includes polymer such as polyethylene or polypropylene
Or polyethylene terephthalate (PET) or non-woven fabrics, metal, glass or other inorganic material etc..
In the embodiment of method of the invention, the pore creating material can be selected from Ammonium bicarbonate food grade, oxalic acid, ammonium carbonate and nitre
One of acid amide or their combination.
In the embodiment of method of the invention, the pore creating material can account for the 0.5-2 weight % of the slurry.
In the embodiment of method of the invention, the ceramic powders can be selected from metal oxide, nitride metal
Object or their combination.The metal oxide can be selected from aluminium oxide, silica, calcium oxide, zirconium oxide, nickel oxide, oxidation
Titanium, copper oxide or other divalent state metal oxides or their combination.The metal nitride can be selected from silicon nitride or nitrogen
Change aluminium etc. and their combination.
In the embodiment of method of the invention, the weight ratio of the oxide powder and the binder can be
In the range of 7-9:1-3.
Coating machine can be used by slurry coating in substrate in method according to the present invention.Coating method include stick apply,
Blade coating, curtain coating, spraying etc..
It is in the embodiment of method of the invention, the coating is dry within the temperature range of 45-75 DEG C, especially
Advantageously the coating is successively dried in the continuous drying section of multiple (such as 4) temperature increments, because this is helped
In the hole of acquisition more evenly.In addition, drying time can be in the range of 1-5 hours.
It is according to the present invention it is coated porous have and have been widely used due to its excellent specific surface area and filter efficiency, example
It such as can be used as filter medium such as mask filter disc or filtering membrane of filter etc..
Embodiment
Hereinafter, the present invention will be illustrated by some embodiments.It should be understood that these embodiments were merely to illustrate
Purpose, they are not limited the invention in any way.
Embodiment 1
The Ammonium bicarbonate food grade of 1.5g is added in 60g polyvinylidene fluoride solution and is stirred to dissolving, is then added
It the Zirconium oxide powder of 140g and stirs evenly to form slurry.Using coating machine by slurry coating the one of polypropylene non-woven fabric
Side is to obtain coating.The non-woven fabrics for being coated with coating, which is put into, to be provided with 4 temperature increments (temperature is followed successively by 45 DEG C, 55 DEG C, 60
DEG C, 75 DEG C) continuous drying section baking oven in dry 1 hour it is of the invention coated porous to obtain.
Use above-mentioned coated porous as the filter disc of commercially available disposable polypropylene non-woven lint face mask.
Embodiment 2
The oxalic acid of 4g is added in 20g polyvinylidene fluoride solution and is stirred to dissolving, the oxygen of 180g is then added
Change nickel by powder and stirs evenly to form slurry.Using coating machine by slurry coating in the side of polypropylene non-woven fabric to obtain
Coating.The non-woven fabrics for being coated with coating, which is put into, is provided with 4 temperature increments (temperature is followed successively by 45 DEG C, 55 DEG C, 60 DEG C, 75 DEG C)
Continuous drying section baking oven in dry 1 hour it is of the invention coated porous to obtain.
Use above-mentioned coated porous as the filter disc of commercially available disposable polypropylene non-woven lint face mask.
Embodiment 3
The ammonium carbonate of 2.5g is added in 20g polyvinylidene fluoride solution and is stirred to dissolving, 180g is then added
Cupric oxide powder and stir evenly to form slurry.Using coating machine by slurry coating the side of polypropylene non-woven fabric with
Obtain coating.The non-woven fabrics for being coated with coating be put into be provided with 4 temperature increments (temperature be followed successively by 45 DEG C, 55 DEG C, 60 DEG C,
75 DEG C) continuous drying section baking oven in dry 1 hour it is of the invention coated porous to obtain.
Use above-mentioned coated porous as the filter disc of commercially available disposable polypropylene non-woven lint face mask.
Embodiment 4
The ammonium nitrate of 2.5g is added in 20g polyvinylidene fluoride solution and is stirred to dissolving, 180g is then added
Titanium dioxide powder and stir evenly to form slurry.Using coating machine by slurry coating the side of polyethylene nonwoven with
Obtain coating.The non-woven fabrics for being coated with coating be put into be provided with 4 temperature increments (temperature be followed successively by 45 DEG C, 55 DEG C, 60 DEG C,
75 DEG C) continuous drying section baking oven in dry 1 hour it is of the invention coated porous to obtain.
Use above-mentioned coated porous as the filter disc of commercially available disposable polypropylene non-woven lint face mask.
Performance test
(1) pore mean diameters
It is micro- to the coated porous carry out prepared in embodiment 1 to 4 by JST-3000 electron scanning Electronic Speculum (Japan Electronics)
Detection is seen, then measures and calculates the pore mean diameters in coating.
(2) porosity
By 3H-2000PS1 specific surface and Porosimetry (Beijing Bei Shide instrument science and technology) to being made in embodiment 1 to 4
It is standby coated porous to be measured according to usual manner.
(3) specific surface area
By 3H-2000PS1 specific surface and Porosimetry (Beijing Bei Shide instrument science and technology) to being made in embodiment 1 to 4
It is standby coated porous to be measured according to usual manner.
(4) filter efficiency
The coated porous filtering as filter disc prepared in mask filtration efficiency tester testing example 1 to 4 is used to imitate
Rate.Air-borne dust in unit area is filtered, and detects filtering front and back dust in air concentration value.
Filter efficiency=(the dust particles concentration in dust particles concentration-filtered air before filtering in air)/mistake
Dust particles concentration before filtering in air
Table 1
As shown in table 1, it is according to the present invention it is coated porous have excellent specific surface area and have as filter medium
Excellent filter efficiency.
Above-described embodiment is only illustrative to illustrate the present invention, and is not intended to limit the present invention.The technology of known this field
Personnel should be appreciated that without departing from the spirit and scope of the present invention, to any change made by the embodiment of the present invention
It is all fallen in the scope of the present invention with variation.And protection scope of the present invention should be determined by the attached claims.
Claims (10)
1. a kind of coated porous, it includes ceramic powders and binder to be used as component, it is described it is coated porous in be distributed with and be averaged
Nanoaperture of diameter in the range of 1-5nm, and it is described coated porous in 1200-2000m2Ratio in the range of/g
Surface area.
2. according to claim 1 coated porous, it is characterised in that the ceramic powders are selected from metal oxide, metal nitrogen
Compound or their combination.
3. according to claim 1 or 2 coated porous, it is characterised in that the weight of the ceramic powders and the binder
Than in the range of 7-9:1-3.
4. a kind of be used to prepare coated porous method, the described method comprises the following steps:
Pore creating material and ceramic powders are added in binder to form slurry；
By slurry coating to obtain coating in substrate；
By the coating drying so that the pore creating material is thermally decomposed, to obtain described coated porous.
5. according to the method described in claim 4, it is characterized in that the pore creating material be selected from Ammonium bicarbonate food grade, oxalic acid, ammonium carbonate and
One of ammonium nitrate or their combination.
6. according to the method described in claim 4, it is characterized in that the pore creating material accounts for the 0.5-2 weight % of the slurry.
7. the method according to any one of claim 4 to 6, it is characterised in that the ceramic powders are aoxidized selected from metal
Object, metal nitride or their combination.
8. the method according to any one of claim 4 to 6, it is characterised in that the ceramic powders and the binder
Weight ratio is in the range of 7:3-9:1.
9. the method according to any one of claim 4 to 6, it is characterised in that by the coating temperature range be 45-
It is successively dried in the continuous drying section of 75 DEG C of multiple temperature increments.
10. the coated porous purposes as filter medium according to any one of claim 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435794.9A CN109621736A (en) | 2018-11-28 | 2018-11-28 | It is coated porous and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435794.9A CN109621736A (en) | 2018-11-28 | 2018-11-28 | It is coated porous and its preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109621736A true CN109621736A (en) | 2019-04-16 |
Family
ID=66069498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811435794.9A Withdrawn CN109621736A (en) | 2018-11-28 | 2018-11-28 | It is coated porous and its preparation method and application |
Country Status (1)
| Country | Link |
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| CN (1) | CN109621736A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981723A (en) * | 2021-01-26 | 2021-06-18 | 无锡优佳无纺科技有限公司 | Preparation method of porous polypropylene non-woven fabric |
-
2018
- 2018-11-28 CN CN201811435794.9A patent/CN109621736A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981723A (en) * | 2021-01-26 | 2021-06-18 | 无锡优佳无纺科技有限公司 | Preparation method of porous polypropylene non-woven fabric |
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Application publication date: 20190416 |