CN106757767A - A kind of preparation and application of high intensity beta cyclodextrin/cellulose acetate composite nano-fiber membrane - Google Patents
A kind of preparation and application of high intensity beta cyclodextrin/cellulose acetate composite nano-fiber membrane Download PDFInfo
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- CN106757767A CN106757767A CN201611248394.8A CN201611248394A CN106757767A CN 106757767 A CN106757767 A CN 106757767A CN 201611248394 A CN201611248394 A CN 201611248394A CN 106757767 A CN106757767 A CN 106757767A
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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
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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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
- B01D67/0002—Organic membrane manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
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- 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
- B01D71/08—Polysaccharides
- B01D71/12—Cellulose derivatives
- B01D71/14—Esters of organic acids
- B01D71/16—Cellulose acetate
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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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
- D04H1/4258—Regenerated cellulose series
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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Abstract
The present invention relates to a kind of preparation and application of high intensity beta cyclodextrin/cellulose acetate composite nano-fiber membrane, belong to nanofiber film preparation and application field；High intensity beta cyclodextrin/cellulose acetate composite nano-fiber membrane of the invention is modified using beta cyclodextrin Dichlorodiphenyl Acetate cellulose nano-fibrous membrane, the cellulose acetate nano fibrous membrane prepared than conventional method has more preferable mechanical property and more excellent methyl-red dye adsorption effect, it is a kind of efficient methyl-red dye adsorbent, its preparation process is simple, experiment condition is gentle, use cost of material relative moderate, cost is relatively low, is had a good application prospect at aspects such as methyl-red dye wastewater treatments.
Description
Technical field
It is fine the invention belongs to nanofiber film preparation and application field, more particularly to a kind of high intensity beta-schardinger dextrin/acetic acid
The preparation and application of the plain composite nano-fiber membrane of dimension.
Background technology
Water pollution problems is become increasingly conspicuous in recent years, and waste water from dyestuff is greatly endangered as an important pollution sources of water pollution
Ecological environment and health are done harm to, such as common methyl-red dye, because its difficult degradation, bio-toxicity are high, enters water body
Growth, the destruction soil of aquatic animals and plants not only can be directly endangered afterwards, and human body can be damage by bioconcentration be good for
Health.At present, mainly there are absorption, chemical precipitation, UF membrane, bioanalysis etc. in the processing method of waste water from dyestuff, wherein absorption and film
The method of separation due to efficiency high, process is simple, do not produce secondary pollution the features such as, obtained the extensive pass of domestic and foreign scholars
Note.
Electrostatic spinning technique can obtain different thicknesses, porosity and hole by adjusting spinning parameter or concentration of dope
The nanofiber in footpath, this kind of nanofiber is highly suitable for preparing the membrane material with absorption or filtering function.Static Spinning nanometer
Tunica fibrosa also has the features such as porosity is high, specific surface area is big.Cellulose acetate nano fibrous membrane is except possessing nano fibrous membrane
Advantage outside, also with raw material sources are wide, renewable and low cost and other advantages, wastewater treatment can be widely used in.Additionally, β-
Cyclodextrin is the ring molecule being formed by connecting by glycosidic bond by glucose unit, with special cavity structure, inner hydrophobic,
The characteristics of external hydrophilic is a kind of with amphipathic oligosaccharide compound.This amphipathic cavity structure causes that β-ring is pasted
Essence can be adsorbed by host -guest inclusion complex to water pollutant, including each organic molecular species, it is thus possible to efficiently be gone
Except the organic dyestuff in waste water from dyestuff.
Due to cellulose acetate nano fibrous membrane and these excellent specific properties of beta-schardinger dextrin, us are promoted to utilize beta-schardinger dextrin
Dichlorodiphenyl Acetate cellulose nano-fibrous membrane carries out enhancing and is modified, and prepares the high intensity β-ring with excellent methyl-red dye absorption property
Dextrin/cellulose acetate composite nano-fiber membrane, and probe into the high intensity beta-schardinger dextrin/acetate fiber of different beta-cyclodextrin content
The application process of plain composite nano-fiber membrane methyl-red dye in methyl-red dye waste water is processed.
Retrieve domestic and international pertinent literature and patent shows：Strengthened with beta-schardinger dextrin Dichlorodiphenyl Acetate cellulose nano-fibrous membrane
It is modified and prepares the method for high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane and its as sorbent treatment Asia
The application of methyl-red dye in methyl-red dye waste water, there is not been reported.
The content of the invention
It is fine that the technical problems to be solved by the invention are to provide a kind of high intensity beta-schardinger dextrin/cellulose acetate composite Nano
Tie up the preparation method of film and its application in methyl-red dye waste water is processed.
The solution for realizing the object of the invention is：A kind of described high intensity beta-schardinger dextrin/cellulose acetate is compound to be received
Rice tunica fibrosa, its preparation method is as follows：
（1）First acetate fiber crude granule is added in mixed solvent of the acetone with dimethylacetylamide, acetone in mixed solvent
It is 2 with the volume ratio of dimethylacetylamide:1, cellulose acetate is 1 with the mass ratio of mixed solvent:9, then at normal temperatures
The h of magnetic agitation 4, is made into the cellulose acetate spinning solution that cellulose acetate mass fraction is 10%；
（2）Beta-schardinger dextrin is added to step（1）In the cellulose acetate spinning solution of gained, beta-schardinger dextrin and cellulose acetate
Mass ratio is 5-40:100, the h of ultrasonic vibration 2 at room temperature, the then h of magnetic agitation 6, it is 5-40%'s to obtain beta-schardinger dextrin content
Beta-schardinger dextrin/cellulose acetate blend spinning liquid is stand-by；
（3）By step（2）The beta-schardinger dextrin content of gained passes through for the beta-schardinger dextrin/cellulose acetate blend spinning liquid of 5-40%
Method of electrostatic spinning is made beta-schardinger dextrin content and is the beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane of 5-40%, then will be spun
A series of beta-schardinger dextrins/cellulose acetate composite nano-fiber membrane be placed in vacuum drying oven, 45 DEG C of h of drying 24, remove it is residual
The mixed solvent for staying, obtains dry high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane；
（4）A kind of high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane answering in methyl-red dye waste water is processed
With：Respectively by high intensity beta-schardinger dextrin/cellulose acetate composite Nano that beta-schardinger dextrin content is 5%, 10%, 20%, 30% and 40%
Tunica fibrosa is clipped in film permeability apparatus, then the waste water containing methyl-red dye is passed through into film permeability apparatus is filtered, and condition is
30 DEG C and the pressure of 1 MPa, filtering complete the adsorption treatment of methyl red in paramethyl red waste water from dyestuff after finishing.
The step（3）The spinning condition of method of electrostatic spinning be：The kV of spinning voltage 17, the mL/h of flow velocity 0.3, receive away from
From 15 cm, ambient humidity 40-50 %.
The step（4）Different beta-cyclodextrin content high intensity beta-schardinger dextrin/cellulose acetate composite nano fiber
Film is 1 with the mass ratio of methyl-red dye waste water:1000, the concentration of methyl red is 80 mg/L in methyl-red dye waste water.
Compared with prior art, its advantage is the present invention：
（1）High intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane synthesis condition prepared by the present invention is gentle, uses
Cost of material relative moderate, will not pollute in building-up process to environment；
（2）High intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane prepared by the present invention has excellent mechanical property
Can, compared with pure cellulose acetate nano fibrous membrane, beta-schardinger dextrin content is 20% high intensity beta-schardinger dextrin/cellulose acetate
The fracture strength of composite nano-fiber membrane improves 49%；
（3）There is high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane prepared by the present invention efficient methyl red to contaminate
Material absorption property, compared with pure cellulose acetate nano fibrous membrane, beta-schardinger dextrin content is 20% high intensity beta-schardinger dextrin/vinegar
Acid cellulose composite nano-fiber membrane paramethyl red Dye Adsorption rate improves 54.5%；
（4）High intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane prepared by the present invention is used to process methyl-red dye
Waste water, has the advantages that low energy consumption, secondary pollution with low cost, simple to operate and relatively low, with good implementation prospect.
Brief description of the drawings
Fig. 1 is the high intensity beta-schardinger dextrin/cellulose acetate composite Nano of different beta-cyclodextrin content prepared by the present invention
The fracture strength of tunica fibrosa and pure cellulose acetate nano fibrous membrane；
Fig. 2 is the high intensity beta-schardinger dextrin/cellulose acetate composite nano fiber of different beta-cyclodextrin content prepared by the present invention
The absorption property of film and pure cellulose acetate nano fibrous membrane paramethyl red dyestuff.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content for having read instruction of the present invention, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiment 1
1 g acetate fiber crude granules are weighed, is added in the mixed liquor solvent of 9 g acetone and dimethylacetylamide, wherein acetone
It is 2 with the volume ratio of dimethylacetylamide:1, the h of magnetic agitation 4, is made into the vinegar that cellulose acetate mass fraction is 10% at room temperature
Acid cellulose spinning solution, the beta-schardinger dextrin for then taking 0.05 g adds cellulose acetate spinning solution, ultrasonic vibration 2 at room temperature
H, then the h of magnetic agitation 6, obtains beta-schardinger dextrin/cellulose acetate blend spinning liquid that beta-schardinger dextrin content is 5%, then passes through
Method of electrostatic spinning, β-ring paste is made by beta-schardinger dextrin/cellulose acetate blend spinning liquid that the beta-schardinger dextrin content of gained is 5%
Smart content is 5% beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane, and the beta-schardinger dextrin content that will be spun is 5% β-ring
Dextrin/cellulose acetate composite nano-fiber membrane is placed in vacuum drying oven, 45 DEG C of h of drying 24, removes the mixed solvent of residual,
Obtain high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane that beta-schardinger dextrin content is 5%.Spinning process condition is：
The kV of spinning voltage 17, the mL/h of flow velocity 0.3, receive distance 15 cm, ambient humidity 40-50 %.
Embodiment 2
1 g acetate fiber crude granules are weighed, is added in the mixed liquor solvent of 9 g acetone and dimethylacetylamide, wherein acetone
It is 2 with the volume ratio of dimethylacetylamide:1, the h of magnetic agitation 4, is made into the vinegar that cellulose acetate mass fraction is 10% at room temperature
Acid cellulose spinning solution, the beta-schardinger dextrin for then taking 0.10 g adds cellulose acetate spinning solution, ultrasonic vibration 2 at room temperature
H, then the h of magnetic agitation 6, obtains beta-schardinger dextrin/cellulose acetate blend spinning liquid that beta-schardinger dextrin content is 10%, then passes through
Method of electrostatic spinning, β-ring paste is made by beta-schardinger dextrin/cellulose acetate blend spinning liquid that the beta-schardinger dextrin content of gained is 10%
Smart content is 10% beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane, the beta-schardinger dextrin content that will be spun be 10% β-
Cyclodextrin/cellulose acetate composite nano-fiber membrane is placed in vacuum drying oven, 45 DEG C of h of drying 24, and the mixing for removing residual is molten
Agent, obtains high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane that beta-schardinger dextrin content is 10%.Spinning technique bar
Part is：The kV of spinning voltage 17, the mL/h of flow velocity 0.3, receive distance 15 cm, ambient humidity 40-50 %.
Embodiment 3
1 g acetate fiber crude granules are weighed, is added in the mixed liquor solvent of 9 g acetone and dimethylacetylamide, wherein acetone
It is 2 with the volume ratio of dimethylacetylamide:1, the h of magnetic agitation 4, is made into the vinegar that cellulose acetate mass fraction is 20% at room temperature
Acid cellulose spinning solution, the beta-schardinger dextrin for then taking 0.20 g adds cellulose acetate spinning solution, ultrasonic vibration 2 at room temperature
H, then the h of magnetic agitation 6, obtains beta-schardinger dextrin/cellulose acetate blend spinning liquid that beta-schardinger dextrin content is 20%, then passes through
Method of electrostatic spinning, β-ring paste is made by beta-schardinger dextrin/cellulose acetate blend spinning liquid that the beta-schardinger dextrin content of gained is 20%
Smart content is 20% beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane, the beta-schardinger dextrin content that will be spun be 20% β-
Cyclodextrin/cellulose acetate composite nano-fiber membrane is placed in vacuum drying oven, 45 DEG C of h of drying 24, and the mixing for removing residual is molten
Agent, obtains high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane that beta-schardinger dextrin content is 20%.Spinning technique bar
Part is：The kV of spinning voltage 17, the mL/h of flow velocity 0.3, receive distance 15 cm, ambient humidity 40-50 %.
Embodiment 4
1 g acetate fiber crude granules are weighed, is added in the mixed liquor solvent of 9 g acetone and dimethylacetylamide, wherein acetone
It is 2 with the volume ratio of dimethylacetylamide:1, the h of magnetic agitation 4, is made into the vinegar that cellulose acetate mass fraction is 30% at room temperature
Acid cellulose spinning solution, the beta-schardinger dextrin for then taking 0.30 g adds cellulose acetate spinning solution, ultrasonic vibration 2 at room temperature
H, then the h of magnetic agitation 6, obtains beta-schardinger dextrin/cellulose acetate blend spinning liquid that beta-schardinger dextrin content is 30%, then passes through
Method of electrostatic spinning, β-ring paste is made by beta-schardinger dextrin/cellulose acetate blend spinning liquid that the beta-schardinger dextrin content of gained is 30%
Smart content is 30% beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane, the beta-schardinger dextrin content that will be spun be 30% β-
Cyclodextrin/cellulose acetate composite nano-fiber membrane is placed in vacuum drying oven, 45 DEG C of h of drying 24, and the mixing for removing residual is molten
Agent, obtains high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane that beta-schardinger dextrin content is 30%.Spinning technique bar
Part is：The kV of spinning voltage 17, the mL/h of flow velocity 0.3, receive distance 15 cm, ambient humidity 40-50 %.
Embodiment 5
1 g acetate fiber crude granules are weighed, is added in the mixed liquor solvent of 9 g acetone and dimethylacetylamide, wherein acetone
It is 2 with the volume ratio of dimethylacetylamide:1, the h of magnetic agitation 4, is made into the vinegar that cellulose acetate mass fraction is 40% at room temperature
Acid cellulose spinning solution, the beta-schardinger dextrin for then taking 0.40 g adds cellulose acetate spinning solution, ultrasonic vibration 2 at room temperature
H, then the h of magnetic agitation 6, obtains beta-schardinger dextrin/cellulose acetate blend spinning liquid that beta-schardinger dextrin content is 40%, then passes through
Method of electrostatic spinning, β-ring paste is made by beta-schardinger dextrin/cellulose acetate blend spinning liquid that the beta-schardinger dextrin content of gained is 40%
Smart content is 40% beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane, the beta-schardinger dextrin content that will be spun be 40% β-
Cyclodextrin/cellulose acetate composite nano-fiber membrane is placed in vacuum drying oven, 45 DEG C of h of drying 24, and the mixing for removing residual is molten
Agent, obtains high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane that beta-schardinger dextrin content is 40%.Spinning technique bar
Part is：The kV of spinning voltage 17, the mL/h of flow velocity 0.3, receive distance 15 cm, ambient humidity 40-50 %.
Embodiment 6
On the type electronic universal testers of Instron 1185 testing example 1, by embodiment 2, embodiment 3, embodiment 4, real
Apply the fracture strength of example 5 and each group nano fibrous membrane of comparative example 1（See Fig. 1）, every group of sample survey 5 times and average.Test-strips
Part is：The cm of clamp distance 5, the mm/min of rate of extension 15.
The result of Fig. 1 shows, with the increase of beta-schardinger dextrin content, high intensity beta-schardinger dextrin/cellulose acetate is compound to be received
The fracture strength first increases and then decreases of rice tunica fibrosa, peak value is reached when beta-schardinger dextrin content is 20%.Received with pure cellulose acetate
Rice tunica fibrosa is compared, and beta-schardinger dextrin content is the fracture of 20% high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane
Intensity improves 49%.This explanation beta-schardinger dextrin Dichlorodiphenyl Acetate cellulose nano-fibrous membrane has the effect of enhancing mechanical property well
Really.
Embodiment 7
Respectively testing example 1, by embodiment 2, embodiment 3, embodiment 4, embodiment 5 and each group nano fibrous membrane of comparative example 1
Surface area, porosity and fibre diameter, the results are shown in Table 1.
Beta-schardinger dextrin/specific surface area of cellulose acetate composite nano-fiber membrane, the hole of the different content beta-schardinger dextrin of table 1
Gap rate and fibre diameter
| Sample | Specific surface area/m2·g-1 | Porosity/% | Diameter/nm | Diameter standard deviations/nm |
| Cellulose acetate | 35.22 | 83.35 | 281 | 87 |
| 5% beta-schardinger dextrin/cellulose acetate | 33.06 | 88.95 | 310 | 108 |
| 10% beta-schardinger dextrin/cellulose acetate | 31.53 | 90.42 | 387 | 185 |
| 20% beta-schardinger dextrin/cellulose acetate | 28.56 | 92.58 | 450 | 226 |
| 30% beta-schardinger dextrin/cellulose acetate | 19.32 | 94.33 | 547 | 307 |
| 40% beta-schardinger dextrin/cellulose acetate | 10.85 | 94.76 | 780 | 392 |
As shown in Table 1, as beta-schardinger dextrin content increases, the fibre diameter of beta-schardinger dextrin/cellulose acetate composite nano fiber
Gradually increase, specific surface area reduces, porosity gradually increases；Additionally, after the content of beta-schardinger dextrin is more than 20%, β-ring paste
The fibre diameter and diameter deviation of essence/cellulose acetate composite nano fiber are significantly increased, and corresponding specific surface area is strongly reduced.
Respectively testing example 1, by embodiment 2, embodiment 3, embodiment 4, embodiment 5 and each group Nanowire of comparative example 1
The absorption property of methyl-red dye in dimension film paramethyl red waste water from dyestuff.Every group of nano fibrous membrane is taken to be clipped in film permeability apparatus,
The methyl red solution that 50 mL concentration are 80 mg/L is passed through in film permeability apparatus is again filtered, condition is 30 DEG C and 1 MPa
Pressure, filtering finish after with ultraviolet specrophotometer determine filtrate light absorption value, research different beta-cyclodextrin content it is high-strength
The absorption property of methyl-red dye in degree beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane paramethyl red waste water from dyestuff（See
Fig. 2）.
As shown in Figure 2, with the increase of beta-schardinger dextrin content, high intensity beta-schardinger dextrin/cellulose acetate composite Nano is fine
The adsorption rate first increases and then decreases of film paramethyl red dyestuff is tieed up, after β-ring pastes content more than 20%, under its adsorption rate starts
Drop.
To sum up result shows：After the content of beta-schardinger dextrin is more than 20%, the chi of the nanofiber of composite nano-fiber membrane
Very little increase, specific surface area is strongly reduced, and the suction-operated to dyestuff has declined.Therefore, height of the beta-schardinger dextrin content at 20%
The absorption property of intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane paramethyl red dyestuff is optimal；With pure acetate fiber
Plain nano fibrous membrane is compared, and beta-schardinger dextrin content is 20% high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane pair
Methyl-red dye adsorption rate improves 54.5%.This explanation the modified of beta-schardinger dextrin significantly enhances high intensity beta-schardinger dextrin/vinegar
Adsorption effect of the acid cellulose composite nano-fiber membrane to methylene red.
Comparative example 1
The preparation method of pure cellulose acetate nano fibrous membrane is as follows：
1 g acetate fiber crude granules are weighed, is added in the mixed liquor solvent of 9 g acetone and dimethylacetylamide, wherein acetone
It is 2 with the volume ratio of dimethylacetylamide:1, the h of magnetic agitation 4, is made the vinegar that cellulose acetate mass fraction is 10% at room temperature
Acid cellulose spinning solution, then by method of electrostatic spinning, cellulose acetate nanometer is made by the cellulose acetate spinning solution of gained
Tunica fibrosa, the cellulose acetate nano fibrous membrane that will be spun is placed in vacuum drying oven, 45 DEG C of h of drying 24, and it is mixed that removal is remained
Liquid solvent is closed, dry cellulose acetate nano fibrous membrane is obtained.Spinning process condition is：The kV of spinning voltage 17, flow velocity 0.3
ML/h, receives distance 15 cm, ambient humidity 40-50 %.
Claims (3)
1. a kind of preparation and application of high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane, it is characterised in that described
A kind of high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane preparation method it is as follows：
（1）First acetate fiber crude granule is added in mixed solvent of the acetone with dimethylacetylamide, acetone in mixed solvent
It is 2 with the volume ratio of dimethylacetylamide:1, cellulose acetate is 1 with the mass ratio of mixed solvent:9, then at normal temperatures
The h of magnetic agitation 4, is made into the cellulose acetate spinning solution that cellulose acetate mass fraction is 10%；
（2）Beta-schardinger dextrin is added to step（1）In the cellulose acetate spinning solution of gained, beta-schardinger dextrin and cellulose acetate
Mass ratio is 5-40:100, the h of ultrasonic vibration 2 at room temperature, the then h of magnetic agitation 6, it is 5-40%'s to obtain beta-schardinger dextrin content
Beta-schardinger dextrin/cellulose acetate blend spinning liquid is stand-by；
（3）By step（2）The beta-schardinger dextrin content of gained passes through for the beta-schardinger dextrin/cellulose acetate blend spinning liquid of 5-40%
Method of electrostatic spinning is made beta-schardinger dextrin content and is the beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane of 5-40%, then will be spun
A series of beta-schardinger dextrins/cellulose acetate composite nano-fiber membrane be placed in vacuum drying oven, 45 DEG C of h of drying 24, remove it is residual
The mixed solvent for staying, obtains dry high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane；
（4）A kind of high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane answering in methyl-red dye waste water is processed
With：Respectively by high intensity beta-schardinger dextrin/cellulose acetate composite Nano that beta-schardinger dextrin content is 5%, 10%, 20%, 30% and 40%
Tunica fibrosa is clipped in film permeability apparatus, then the waste water containing methyl-red dye is passed through into film permeability apparatus is filtered, and condition is
30 DEG C and the pressure of 1 MPa, filtering complete the adsorption treatment of methyl red in paramethyl red waste water from dyestuff after finishing.
2. a kind of preparation of high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane according to claim 1 and
Using, it is characterised in that the step（3）The spinning condition of method of electrostatic spinning be：The kV of spinning voltage 17, the mL/ of flow velocity 0.3
H, receives distance 15 cm, ambient humidity 40-50 %.
3. a kind of preparation of high intensity beta-schardinger dextrin/cellulose acetate composite nano-fiber membrane according to claim 1 and
Using, it is characterised in that the step（4）Different beta-cyclodextrin content high intensity beta-schardinger dextrin/cellulose acetate be combined
Nano fibrous membrane is 1 with the mass ratio of methyl-red dye waste water:1000, the middle methyl red concentration of methyl-red dye waste water is
80 mg/L。
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| CN201611248394.8A CN106757767A (en) | 2016-12-29 | 2016-12-29 | A kind of preparation and application of high intensity beta cyclodextrin/cellulose acetate composite nano-fiber membrane |
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| CN107462435A (en) * | 2017-08-01 | 2017-12-12 | 南京理工大学 | It is a kind of using cyclodextrin polymeric membrane as the dynamics passive sampling apparatus with reference to phase |
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