CN104437117A - Preparation method of cellulose acetate forward osmosis membrane for bitter water desalting - Google Patents
Preparation method of cellulose acetate forward osmosis membrane for bitter water desalting Download PDFInfo
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- CN104437117A CN104437117A CN201410718877.4A CN201410718877A CN104437117A CN 104437117 A CN104437117 A CN 104437117A CN 201410718877 A CN201410718877 A CN 201410718877A CN 104437117 A CN104437117 A CN 104437117A
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- cellulose acetate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention particularly relates to a preparation method of a cellulose acetate forward osmosis membrane for bitter water desalting. The preparation method comprises the following steps: (1) sequentially adding cellulose acetate, a solvent and nano particles into a container, stirring for dissolving at a stirring temperature of 30-70 DEG C for 6-24 hours, and then, defoaming the solution for 2-3 hours at a defoaming temperature of 25-50 DEG C, thereby obtaining a uniformly dispersed casting membrane solution for later use; (2) scraping a film by virtue of a film scraper, coating a substrate with the cellulose acetate casting membrane solution defoamed in the step (1), uniformly spreading the cellulose acetate casting membrane solution on the substrate by virtue of a scraper to form a bottom membrane layer, and putting into air for volatilizing for 5-20 seconds at a temperature of 15-45 DEG C and with relative humidity of 20%-80%; and (3) putting the bottom membrane layer into a coagulation bath, enabling gel to form a film with a compact sheet layer through phase conversion, cleaning the prepared membrane with deionized water, removing the residual organic solvent to obtain the forward osmosis membrane, and performing thermal treatment for 10-30 minutes in a water bath of 5-70 DEG C. The cellulose acetate forward osmosis membrane is mainly used for bitter water desalting.
Description
Technical field
The invention belongs to the preparation field of water treatment polymeric membrane, be specifically related to a kind of preparation method of the Cellulose acetate forward osmotic membrane for brackish water desalination.
Background technology
China underground brackish water total resources about 27,700,000,000 m
3, wherein allowable exploitation about 14,400,000,000 m
3, the overwhelming majority is present in 10-100m place, underground, is suitable for exploitation to utilize.China's salt water is mainly distributed in and easily arid North China, northwest and coastal area occurs.Surface water and shallow well water are the main drinking water sources in western provinces and regions (comprising Shaanxi, Gansu, Ningxia, Qinghai, provinces and regions, Xinjiang five).Due to the impact that the composite factors such as geology and geomorphology, hydrogeology, climatic environment and " three wastes " pollute, the Northwest's drought, surface water quality mostly is the existing bitter polluted in various degree, and quality of groundwater is nearly all high mineralization height fluorine bitter, and water shortage problem is particularly outstanding.According to statistics, the Northwest's bitter year allowable exploitation 46.9 billion cubic meter, is mainly distributed in Gansu, Xinjiang, Ningxia and West Inner Mongolia.According to the estimation of geology department, there are 8.54 hundred million m in Ningxia
3, there are 1.8 hundred million m in Gansu
3, there are 15.35 hundred million m in Xinjiang
3underground water belong to bitter (micro-) salt water.
Bitter stock number is enriched, along with the developing rapidly of economy, living standards of the people improve constantly and the continuous growth of population and strategy to develop western regions implement the fast development of the economic society brought, shortage of water resources has become one of the topmost ecological environment and socioeconomic problem that western province faces.Brackish water desalination water can be bitter Area Inhabitants domestic water and water for industrial use provides important supplement water source and emergent water source.
Forward osmosis membrane separation process is a kind of new membrane isolation technics grown up in the last few years, it utilizes the osmotic pressure caused by concentration difference between two kinds of solution, and it can be used as the driving force making water be transported to higher concentration solution via film from lower concentration solutions.Compared with traditional pressure-driven membrane process, positive process of osmosis does not need impressed pressure, energy consumption is less, the pollution level of process to film is lower, the rate of recovery of process is higher, environmental effect is friendly, and there is wide development space in the fields such as these advantages due to positive process of osmosis make it concentrate at desalinization, bitter desalination, food, generate electricity, drug controlled release.
In theory, just permeating can with osmotic pressure very high draw liquid to realize the membrane flux larger than counter-infiltration, but research finds that actual membrane flux is much smaller than theoretical value, this is because commercial reverse osmosis membrane has serious dissymmetrical structure, its cortex construction is dense, porosity is not high, causes there is very serious interior concentration polarization phenomenon in positive process of osmosis.Membrane flux is often made to reduce by 80%.Only have by improving membrane structure and film properties is alleviated.At present for interior concentration polarization phenomenon, occurred multiple solution, effective precautions has: increase supporting layer aperture, adopt hydroaropic substance to prepare supporting layer." a kind of preparation method of polyvinylidene fluoride composite cellulose acetate forward osmosis membrane " (patent No.: CN 102580562 B), using hydrophilicity kynoar microfiltration membranes as support counterdie, improves water flux." a kind of two cortex forward osmosis membrane and preparation method thereof " (patent No.: CN103055713 A), " a kind of preparation method of acetylbutyrylcellulose forward osmosis membrane " (patent No.: CN 102949941 A), " a kind of Cellulose acetate forward osmotic membrane and preparation method thereof " (patent No.: CN 103537200 A) and " a kind of Cellulose acetate forward osmotic membrane material and preparation method thereof " (patent No.: CN 103785301 A) utilizes hydrophilic cellulose acetate (CA) to prepare active layer, the Cellulose acetate forward osmotic membrane that change preparation method obtains has higher salt-stopping rate and membrane flux.
According to bibliographical information, current commercial forward osmosis membrane mainly contains the Triafol T forward osmosis membrane that Hydration Technologies company of the U.S. produces, but limits its application because this membrane material is easy to degraded.Therefore, being necessary to develop that the life-span is long, intensity good, antipollution, price are low, have high water flux, forward osmosis membrane that equipment with high desalinization, interior concentration polarization are little, is the positive infiltration technology key point that developed and apply at present.
Summary of the invention
The object of the invention is the preparation method of the forward osmosis membrane in order to provide a kind of brackish water desalination, this method is succinctly reasonable, and gained forward osmosis membrane effectively can desalinate bitter.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of preparation method of the Cellulose acetate forward osmotic membrane for brackish water desalination, described preparation method is made up of following steps: cellulose acetate, solvent and nano particle are added stirring and dissolving in stirred vessel by (1) in order successively, and whipping temp is 30 ~ 70 DEG C, mixing time is 6 ~ 24 hours; Afterwards deaeration is carried out to solution, deaeration temperature 25 ~ 50 DEG C, deaeration 2 ~ 3 hours, obtain finely dispersed cellulose acetate casting solution, for subsequent use;
(2) knifing machine knifing is utilized, cellulose acetate casting solution through deaeration process in step (1) is coated on base material, and adopt scraper to scrape uniformly to form bottom membrane on base material, bottom membrane on base material being placed in temperature is 15 ~ 45 DEG C, and relative humidity is volatilize 5 ~ 20 seconds under the air of 20% ~ 80%;
(3) bottom membrane is put into coagulation bath through inversion of phases, gel becomes to have the film of dense layer surface, by prepared film washed with de-ionized water, the organic solvent that removing is remaining, obtained forward osmosis membrane, and in 5 ~ 70 DEG C of water-baths heat treatment 10 ~ 30min; Being placed on mass concentration after cleaning is 4 ~ 20 DEG C of Cord blood in the solution of sodium bisulfite of 0.5% ~ 1%;
In cellulose acetate casting solution described in step (1), the weight content of each material is: cellulose acetate 20 ~ 50 ﹪, solvent 50 ~ 80 ﹪; Nano particle 0.01 ~ 0.05%, its three's percentage by weight sum is absolutely;
Described cellulose acetate is: Triafol T and/or cellulose diacetate and/or cellulose acetate propionate and/or acetate butyrate fiber;
Described solvent is: dimethyl formamide, dimethylacetylamide, methyl pyrrolidone, acetone, triethyl phosphate, dimethyl sulfoxide (DMSO), trimethyl phosphate, hexamethyl phosphoramide, tetrachloroethanes, N, N-dimethyl formamide, the combination of a kind of in N-methyl pyrrolidone, carrene, propylene glycol carbonate and diglycol or more than two kinds;
Described nano particle is: high-silicon type zeolite molecular sieve, TiO
2nano particle, SiO
2nano particle, chitin are nanocrystalline, any one in nano-organosilicon, organic carbon nanotube and pyrene derivatives nano particle; Base material described in step (2) is: the one in polyester screen, non-woven fabrics, cotton, glass plate and curtain coating plate.
Wherein, Cellulose acetate forward osmotic membrane is with Triafol T and be selected from the mixture of the arbitrary cellulose acetate in cellulose diacetate, cellulose acetate propionate and acetate butyrate fiber for main material, has good chemical stability, higher rejection and water flux; This forward osmosis membrane is mainly used in brackish water desalination; Add nano particle, enhance the intensity of forward osmosis membrane.
Beneficial effect of the present invention: this method is rationally succinct, and the forward osmosis membrane of preparation desalinates bitter preferably, achieves significant technique effect.
Detailed description of the invention
The preparation method of embodiment 1, a kind of Cellulose acetate forward osmotic membrane for brackish water desalination, described preparation method is made up of following steps: mass ratio is Triafol T and cellulose diacetate mixture 20g, 40g N-methyl pyrrolidone, the 2g TiO2 nano particle of 3:1 by (1), be sequentially added into and carry out stirring dissolving in 6 hours under temperature 40 DEG C of conditions, form uniform casting solution; 25 DEG C leave standstill deaeration in 3 hours;
(2) knifing machine knifing is utilized, casting solution through deaeration process in step (1) is coated on the glass plate of dried and clean, form nascent state film by knifing machine knifing, and nascent state film to be placed in temperature be 25 DEG C, relative humidity is volatilize 5 seconds under the air of 60%;
(3) nascent state film is put into the coagulation bath that medium is water, coagulation bath temperature 60 C, heat treatment 15min, become to have the film of dense layer surface through inversion of phases gel, by prepared film washed with de-ionized water, the organic solvent that removing is remaining, obtained forward osmosis membrane.
Positive permeance property test condition: with the NaCl solution of 0.5mol/L for drawing liquid, the sodium-chloride water solution of 0.1mol/L as material liquid, temperature 25 DEG C, positive permeation flux is 12 L/ (m
2h), rejection 98.2%.
The preparation method of embodiment 2, a kind of Cellulose acetate forward osmotic membrane for brackish water desalination, described preparation method is made up of following steps: 17g cellulose acetate is added 30g N-methyl pyrrolidone by (1), 10g acetone, 2.5g chitin are nanocrystalline, be sequentially added into and carry out stirring dissolving in 12 hours under temperature 50 C condition, form uniform casting solution; 37 DEG C leave standstill deaeration in 2.5 hours;
(2) utilize knifing machine knifing, be coated on non-woven fabrics by the casting solution through deaeration process in step (1), form nascent state film by knifing machine knifing, and nascent state film to be placed in temperature be 30 DEG C, relative humidity is volatilize 10 seconds under the air of 55%;
(3) nascent state film is put into the coagulation bath that medium is water, coagulation bath temperature 25 DEG C, heat treatment 25min, become to have the film of dense layer surface through inversion of phases gel, by prepared film washed with de-ionized water, the organic solvent that removing is remaining, obtained forward osmosis membrane.
Positive permeance property test condition: with the NaCl solution of 0.5mol/L for drawing liquid, the sodium-chloride water solution of 0.1mol/L as material liquid, temperature 25 DEG C, positive permeation flux is 11.38 L/ (m
2h), rejection 99.52%.
The preparation method of embodiment 3, a kind of Cellulose acetate forward osmotic membrane for brackish water desalination, described preparation method is made up of following steps: (1) is by the mixture 40g of the cellulose acetate of mass ratio 2:1 and cellulose acetate propionate, add, 20g acetone, 20 triethyl phosphates, 3.5g TiO2 nano particle, be sequentially added into and carry out stirring dissolving in 6 hours under temperature 70 C condition, form uniform casting solution; 37 DEG C leave standstill deaeration in 2 hours;
(2) utilize knifing machine knifing, be coated on non-woven fabrics by the casting solution through deaeration process in step (1), form nascent state film by knifing machine knifing, and nascent state film to be placed in temperature be 15 DEG C, relative humidity is volatilize 15 seconds under the air of 70%;
(3) nascent state film is put into the coagulation bath that medium is water, coagulation bath temperature 45 C, heat treatment 15min, become to have the film of dense layer surface through inversion of phases gel, by prepared film washed with de-ionized water, the organic solvent that removing is remaining, obtained forward osmosis membrane.
Positive permeance property test condition: with the NaCl solution of 0.5mol/L for drawing liquid, the sodium-chloride water solution of 0.1mol/L as material liquid, temperature 25 DEG C, positive permeation flux is 13.38 L/ (m2h), rejection 98.52%.
In embodiment 1-3: in the cellulose acetate casting solution described in step (1), the weight content of each material is: cellulose acetate 20 ~ 50 ﹪, solvent 50 ~ 80 ﹪; Nano particle 0.01 ~ 0.05%, its three's percentage by weight sum is absolutely;
Described cellulose acetate is: Triafol T and/or cellulose diacetate and/or cellulose acetate propionate and/or acetate butyrate fiber;
Described solvent is: dimethyl formamide, dimethylacetylamide, methyl pyrrolidone, acetone, triethyl phosphate, dimethyl sulfoxide (DMSO), trimethyl phosphate, hexamethyl phosphoramide, tetrachloroethanes, N, N-dimethyl formamide, the combination of a kind of in N-methyl pyrrolidone, carrene, propylene glycol carbonate and diglycol or more than two kinds;
Described nano particle is: high-silicon type zeolite molecular sieve, TiO
2nano particle, SiO
2nano particle, chitin are nanocrystalline, any one in nano-organosilicon, organic carbon nanotube and pyrene derivatives nano particle;
Base material described in step (2) is: the one in polyester screen, non-woven fabrics, cotton, glass plate and curtain coating plate.
Claims (1)
1. the preparation method for the Cellulose acetate forward osmotic membrane of brackish water desalination, it is characterized in that: described preparation method is made up of following steps: cellulose acetate, solvent and nano particle are added stirring and dissolving in stirred vessel by (1) in order successively, whipping temp is 30 ~ 70 DEG C, mixing time is 6 ~ 24 hours; Afterwards deaeration is carried out to solution, deaeration temperature 25 ~ 50 DEG C, deaeration 2 ~ 3 hours, obtain finely dispersed cellulose acetate casting solution, for subsequent use;
(2) knifing machine knifing is utilized, cellulose acetate casting solution through deaeration process in step (1) is coated on base material, and adopt scraper to scrape uniformly to form bottom membrane on base material, bottom membrane on base material being placed in temperature is 15 ~ 45 DEG C, and relative humidity is volatilize 5 ~ 20 seconds under the air of 20% ~ 80%;
(3) bottom membrane is put into coagulation bath through inversion of phases, gel becomes to have the film of dense layer surface, by prepared film washed with de-ionized water, the organic solvent that removing is remaining, obtained forward osmosis membrane, and in 5 ~ 70 DEG C of water-baths heat treatment 10 ~ 30min; Being placed on mass concentration after cleaning is 4 ~ 20 DEG C of Cord blood in the solution of sodium bisulfite of 0.5% ~ 1%;
In cellulose acetate casting solution described in step (1), the weight content of each material is: cellulose acetate 20 ~ 50 ﹪, solvent 50 ~ 80 ﹪; Nano particle 0.01 ~ 0.05%, its three's percentage by weight sum is absolutely;
Described cellulose acetate is: Triafol T and/or cellulose diacetate and/or cellulose acetate propionate and/or acetate butyrate fiber;
Described solvent is: dimethyl formamide, dimethylacetylamide, methyl pyrrolidone, acetone, triethyl phosphate, dimethyl sulfoxide (DMSO), trimethyl phosphate, hexamethyl phosphoramide, tetrachloroethanes, N, N-dimethyl formamide, the combination of a kind of in N-methyl pyrrolidone, carrene, propylene glycol carbonate and diglycol or more than two kinds;
Described nano particle is: high-silicon type zeolite molecular sieve, TiO
2nano particle, SiO
2nano particle, chitin are nanocrystalline, any one in nano-organosilicon, organic carbon nanotube and pyrene derivatives nano particle;
Base material described in step (2) is: the one in polyester screen, non-woven fabrics, cotton, glass plate and curtain coating plate.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561808A (en) * | 2016-02-04 | 2016-05-11 | 中国科学院生态环境研究中心 | Preparation method for cellulose acetate forward osmosis membrane |
| CN107158967A (en) * | 2017-06-16 | 2017-09-15 | 上海海事大学 | A kind of carbon containing composite semipermeable membrane, preparation method and the usage that water is evaporated for light |
| CN107376666A (en) * | 2017-08-09 | 2017-11-24 | 中国农业大学 | A kind of modified cellulose acetate film and preparation method and application |
| CN107413196A (en) * | 2017-04-19 | 2017-12-01 | 天津大学 | Forward osmosis membrane preparation method and method for treating pesticide wastewater by using forward osmosis membrane |
| CN107803118A (en) * | 2017-11-03 | 2018-03-16 | 宁波大学 | A kind of Triafol T/polyamide composite film and application thereof |
| CN108554177A (en) * | 2018-01-11 | 2018-09-21 | 威海惠高生物科技有限公司 | A kind of preparation method of degradable forward osmosis membrane |
| CN110711501A (en) * | 2019-11-22 | 2020-01-21 | 深圳市君脉膜科技有限公司 | Preparation method of porous nano antibacterial particles and composite forward osmosis membrane |
| CN112973457A (en) * | 2021-02-01 | 2021-06-18 | 江苏大学 | Preparation method of cellulose acetate boron affinity imprinted membrane and application of cellulose acetate boron affinity imprinted membrane in selective separation of shikimic acid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103816811A (en) * | 2014-02-26 | 2014-05-28 | 宁波莲华环保科技股份有限公司 | Preparation method of organic forward-osmosis membrane |
| CN104147943A (en) * | 2014-08-15 | 2014-11-19 | 武汉大学 | Preparation method and application of high-molecular forward osmosis membrane |
-
2014
- 2014-11-27 CN CN201410718877.4A patent/CN104437117A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103816811A (en) * | 2014-02-26 | 2014-05-28 | 宁波莲华环保科技股份有限公司 | Preparation method of organic forward-osmosis membrane |
| CN104147943A (en) * | 2014-08-15 | 2014-11-19 | 武汉大学 | Preparation method and application of high-molecular forward osmosis membrane |
Non-Patent Citations (1)
| Title |
|---|
| 黄渭澄等: "《电镀三废处理》", 31 December 1983, 四川科学技术出版社 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561808A (en) * | 2016-02-04 | 2016-05-11 | 中国科学院生态环境研究中心 | Preparation method for cellulose acetate forward osmosis membrane |
| CN107413196A (en) * | 2017-04-19 | 2017-12-01 | 天津大学 | Forward osmosis membrane preparation method and method for treating pesticide wastewater by using forward osmosis membrane |
| CN107413196B (en) * | 2017-04-19 | 2019-12-13 | 天津大学 | forward osmosis membrane preparation method and method for treating pesticide wastewater by using forward osmosis membrane |
| CN107158967A (en) * | 2017-06-16 | 2017-09-15 | 上海海事大学 | A kind of carbon containing composite semipermeable membrane, preparation method and the usage that water is evaporated for light |
| CN107376666A (en) * | 2017-08-09 | 2017-11-24 | 中国农业大学 | A kind of modified cellulose acetate film and preparation method and application |
| CN107376666B (en) * | 2017-08-09 | 2019-08-02 | 中国农业大学 | A kind of modified cellulose acetate film and the preparation method and application thereof |
| CN107803118A (en) * | 2017-11-03 | 2018-03-16 | 宁波大学 | A kind of Triafol T/polyamide composite film and application thereof |
| CN108554177A (en) * | 2018-01-11 | 2018-09-21 | 威海惠高生物科技有限公司 | A kind of preparation method of degradable forward osmosis membrane |
| CN110711501A (en) * | 2019-11-22 | 2020-01-21 | 深圳市君脉膜科技有限公司 | Preparation method of porous nano antibacterial particles and composite forward osmosis membrane |
| CN110711501B (en) * | 2019-11-22 | 2024-01-23 | 深圳市君脉膜科技有限公司 | Preparation method of porous nano antibacterial particles and composite forward osmosis membrane |
| CN112973457A (en) * | 2021-02-01 | 2021-06-18 | 江苏大学 | Preparation method of cellulose acetate boron affinity imprinted membrane and application of cellulose acetate boron affinity imprinted membrane in selective separation of shikimic acid |
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Application publication date: 20150325 |