CN101234298A - Porous filter membrane prepared by plant base raw material - Google Patents
Porous filter membrane prepared by plant base raw material Download PDFInfo
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- CN101234298A CN101234298A CNA2007100025899A CN200710002589A CN101234298A CN 101234298 A CN101234298 A CN 101234298A CN A2007100025899 A CNA2007100025899 A CN A2007100025899A CN 200710002589 A CN200710002589 A CN 200710002589A CN 101234298 A CN101234298 A CN 101234298A
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Abstract
The invention provides a simple and practical preparation method for preparing porous filter membrane of low cost. The method comprises the following steps: the plant base materials are pre-carbonized treatment after being crushed; the pre-carbonized materials are crushed, ground finely, sorted, and is added with the water or organic solvent and additive to prepare the coating solution which is coated on the porous support; the coated porous support after drying is put into the carbonization furnace to be carbonized and cooled, thus obtaining the method for preparing the unsymmetrical porous filter membrane of low cost with narrow distributed pore diameter. The production is applied to the separation of the micro-filtration and ultrafiltration or used as the support of the gas separation membrane.
Description
Invention field
The present invention relates to the membrane preparation method in the membrane separation technique field.A kind of method of utilizing the plant base raw material to prepare porous membrane is proposed.
Background of invention
Existing perforated membrane includes organic polymeric membrane and inoranic membrane.Inoranic membrane is owing to have good chemical stability and resistance to elevated temperatures is developed rapidly.Inoranic membrane mainly comprises metal film, ceramic membrane and carbon membrane, wherein carbon membrane is a kind of novel inorganic separating film, production technology generally adopts macromolecule raw material to prepare coating liquid as presoma, coating, drying on porous supporting body, carry out high temperature carbonization then and obtain, the emphasis of carbon membrane research at present is on gas separates.Utilize the plant base raw material,, prepare porous membrane, can be applicable to the supporter of micro-filtration, ultra-filtration and separation and gas separation membrane as almond shell, walnut shell, peach-pit shell, cocoanut shell, jujube nuclear.
Summary of the invention
The purpose of this invention is to provide a kind of plant with cheapness is raw material, adopts simple technology, is about to carry out pre-charing after the fragmentation of plant base raw material;
Pre-carbide is pulverized, added solvent in after levigate, the sorting and additive is made coating liquid; Coating liquid is coated on the porous supporting body; Porous supporting body drying after applying is placed on charing in the retort; The preparation pore-size distribution is narrow, the method for the porous membrane that cost is low.
Realize design of the present invention based on: adopt and macromolecule raw material similar performance, the abundant cheap plant in source are raw material, through apply, dry, charing formation porous membrane, can be applicable to the supporter of micro-filtration, ultra-filtration and separation and gas separation membrane.
Implementing concrete grammar of the present invention is:
At first will carry out pre-charing after the fragmentation of plant base raw material; With pre-carbide pulverize, levigate and sorting, obtain the raw material of different-grain diameter, add entry or organic solvent and additive therein, additive is one or more of binding agent or dispersant.Binding agent is selected from one or more in phenolic resins class binding agent, cellulose and derivative class binding agent, tar, pitch, residual oil, starch, polyvinyl alcohol or its mixture; Dispersant is selected from polycarboxylate, poly-inferior carboxylate, alkylsulfonate, alkylbenzenesulfonate, alkyl polyvinylether, alkyl polyoxyethylene ether.Adding behind solvent and the additive stirs raw material makes coating liquid, according to the supporter difference that is adopted, add various amounts of solvent and additive, coating liquid is coated on the porous supporting body, adopt spraying process, knife coating or dip coating to apply, supporter drying with after applying places retort charing, cooling then.Carbonization temperature is according to the charing characteristic of different material and difference, programming rate with 0.1～30 ℃/min rises to carbonization temperature (300-1000 ℃), constant temperature 0-500 minute, naturally cooling then, obtain anisotropic membrane, this film can directly apply to micro-filtration, ultra-filtration and separation, also can be used as the supporter of asymmetric gas separation membrane.The present invention is a raw material with the plant shell of cheapness, makes porous membrane cheaply by simple charring
Introduce embodiments of the invention below:
Embodiment 1
With the apricot shell 500 ℃ of pre-charings 1 hour, with pre-carbide pulverizing, sand milling, through separating the carbon dust obtain average grain diameter＜38 micron, add an amount of water and 10% water soluble phenol resin therein, stir, on the porous charcoal supporter of 1.6 microns of average pore sizes, apply, drying at room temperature 24 hours, insert in the retort then, programming rate with 3 degrees centigrade of per minutes rises to 800 degrees centigrade, constant temperature 1 hour naturally cools to room temperature, obtains the asymmetric perforated membrane of 0.35 micron of average pore size.
Embodiment 2
With the apricot shell 500 ℃ of pre-charings 1 hour, with pre-carbide pulverize, sand milling, through separating the carbon dust that obtains average grain diameter＜24 micron, other process conditions can obtain the asymmetric perforated membrane of 0.21 micron of average pore size with embodiment 1.
Claims (10)
1. method of utilizing the plant base raw material to make porous membrane, it is made up of following step:
A) will carry out pre-charing after the fragmentation of plant base raw material;
B) pre-carbide pulverized, added entry or organic solvent and additive in after levigate, the sorting and make coating liquid;
C) coating liquid is coated on the porous supporting body;
D) the porous supporting body drying after will applying;
E) place the retort charing then; With
F) cooling.
2. according to the process of claim 1 wherein, the plant base raw material is selected from following one or more:
A) almond shell;
B) walnut shell;
C) peach-pit shell;
D) cocoanut shell;
E) jujube nucleocapsid
F) bamboo.
3. according to the process of claim 1 wherein, pre-carbonization condition is: carbonization temperature 300-1000 degree centigrade.
4. according to the process of claim 1 wherein, additive is selected from following one or more:
A) binding agent: be selected from phenolic resins class binding agent, cellulose and derivative class binding agent, tar, pitch, residual oil, starch, polyvinyl alcohol or its mixture;
B) dispersant: be selected from polycarboxylate, poly-inferior carboxylate, alkylsulfonate, alkylbenzenesulfonate, alkyl polyvinylether, alkyl polyoxyethylene ether.
5. according to the process of claim 1 wherein, additive amount is: binding agent 0.1-30%, dispersant 0.01-10%.
6. according to the process of claim 1 wherein, painting method is spraying process, knife coating or dip coating.
7. according to the process of claim 1 wherein, drying condition is: air dry or heating, drying or vacuum drying.
8. according to the process of claim 1 wherein, carbonization condition is: carbonization temperature 300-1000 ℃, and 0.1～30 ℃ of heating rate per minute, constant temperature time 0～500 minute.
9. according to the process of claim 1 wherein, cooling is the nature cooling.
10. according to the process of claim 1 wherein, supporter can be porous ceramic support, porous metals supporter, porous charcoal supporter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100025899A CN101234298A (en) | 2007-01-29 | 2007-01-29 | Porous filter membrane prepared by plant base raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100025899A CN101234298A (en) | 2007-01-29 | 2007-01-29 | Porous filter membrane prepared by plant base raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101234298A true CN101234298A (en) | 2008-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100025899A Pending CN101234298A (en) | 2007-01-29 | 2007-01-29 | Porous filter membrane prepared by plant base raw material |
Country Status (1)
| Country | Link |
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| CN (1) | CN101234298A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107123B (en) * | 2009-12-23 | 2012-08-22 | 北京航空航天大学 | Method for preparing porous carbon membrane |
| CN105771673A (en) * | 2016-05-04 | 2016-07-20 | 南京博膜新材料科技有限公司 | Macromolecular separating membrane |
| CN108722209A (en) * | 2018-06-13 | 2018-11-02 | 贵州永合益环保科技有限公司 | A kind of processing technology of graphene hybridized film |
-
2007
- 2007-01-29 CN CNA2007100025899A patent/CN101234298A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107123B (en) * | 2009-12-23 | 2012-08-22 | 北京航空航天大学 | Method for preparing porous carbon membrane |
| CN105771673A (en) * | 2016-05-04 | 2016-07-20 | 南京博膜新材料科技有限公司 | Macromolecular separating membrane |
| CN105771673B (en) * | 2016-05-04 | 2019-01-11 | 南京博膜新材料科技有限公司 | Polymeric membrane for separation |
| CN108722209A (en) * | 2018-06-13 | 2018-11-02 | 贵州永合益环保科技有限公司 | A kind of processing technology of graphene hybridized film |
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Application publication date: 20080806 |