CN107308829A - Preparation method for the polylactic acid porous film of anionic dye waste water processing - Google Patents
Preparation method for the polylactic acid porous film of anionic dye waste water processing Download PDFInfo
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- CN107308829A CN107308829A CN201710584176.XA CN201710584176A CN107308829A CN 107308829 A CN107308829 A CN 107308829A CN 201710584176 A CN201710584176 A CN 201710584176A CN 107308829 A CN107308829 A CN 107308829A
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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
- B01D71/48—Polyesters
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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
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/08—Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
- B01J39/16—Organic material
- B01J39/18—Macromolecular compounds
- B01J39/19—Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/39—Electrospinning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/16—Membrane materials having positively charged functional groups
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
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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
Abstract
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is mainly：A, by dichloromethane and N, N dimethylformamides press 49:1 volume ratio is configured to mixed solvent, and the strong basicity micromolecular compound containing polyamino of the PLA of 15~25 parts of weights and 0.1~0.4 part of weight is added into 100 parts of heavy in the mixed solvents, is dissolved in 30~38 DEG C of stirred in water bath to PLA, obtains mixed liquor；B, into mixed liquor add 0.6 1.2 parts of weights the silane coupler containing amino in 30~38 DEG C of the 1.3h of stirred in water bath 0.8, obtain PLA electrostatic spinning solution；C, using PLA electrostatic spinning solution as electrostatic spinning material liquid, carry out electrostatic spinning produce.Porous membrane prepared by the method has excellent absorption property to the anion in anionic dye waste water, and the purified treatment effect to waste water is good, and its preparation technology is simple.
Description
Technical field
The present invention relates to a kind of preparation method of the polylactic acid porous film handled for anionic dye waste water.
Technical background
Waste water from dyestuff is one of main noxious industry waste water, is mainly derived from dye and dye intermediate production industry,
The material that is lost in the mother liquor of various products and intermediate crystallizations, production process and wash away the sewage on ground etc. and constitute.With
Dye industry goes from strength to strength, and it produces waste water turns into main pollution source of water body.Field of environment engineering is according to dye molecule
The ionic state come is dissociateed in aqueous and is divided into：Anionic dye (such as direct dyes, acid dyes)；The dye of positive ion
(such as basic-dyeable fibre)；Nonionic dye (such as disperse dyes).Wherein, the production scale of anionic dye is big, the waste water of discharge
It is many, big to the pollution of environment；For environmental protection purified treatment must be carried out to anionic dye waste water.
Electrostatic spinning film absorption method as it is a kind of to waste water carry out purified treatment technology, convenience and high-efficiency, it is simple to operate,
Easily prepare, adsorbance is big, and the group that complexing is provided can be introduced, increase the ability of chemisorbed, be at present most
Has potential method of wastewater treatment.But anionic dye waste water is handled using electrostatic spinning film, due to Static Spinning
The suction-operated of silk film and anionic dye is small, and its purified treatment effect is poor.
The content of the invention
It is an object of the invention to provide a kind of preparation side of the polylactic acid porous film handled for anionic dye waste water
Method, porous membrane prepared by this method has excellent absorption property to the anion in anionic dye waste water, to waste water
Purified treatment effect is good；And its preparation technology is simple.
The technical scheme adopted by the invention for realizing the object of the invention is, a kind of for gathering that anionic dye waste water is handled
The preparation method of lactic acid porous membrane, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed into 4-9:1 volume ratio is configured to mixed solvent, by 15~25
The strong basicity micromolecular compound containing polyamino of the PLA of part weight and 0.1~0.4 part of weight adds 100 parts of heavy mixed solvents
In, in 30~38 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, stirred in water bath of the silane coupler containing amino at 30~38 DEG C for adding into mixed liquor 0.6-1.2 parts of weights
0.8-1.3h, obtains PLA electrostatic spinning solution；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.
Compared with prior art, the beneficial effects of the invention are as follows：
First, the inventive method is used as the molten of PLA using dichloromethane and N,N-dimethylformamide mixed solvent
Agent, dichloromethane has stronger volatility, the volatility of mixed solvent is can further improve, in the continuous wire vent of electrostatic spinning
Cheng Zhong, solvent volatilizees rapidly, is exchanged with the water in air, fiber solidifying, water droplet volatilization, and then has in fiber surface formation
There is the hole of nano-scale.Meanwhile, electrostatic fibre wire vent, mutually overlap joint also form a large amount of holes.So that polylactic acid film is formed
Multi-stage pore structure, increases the specific surface area of material, promotes polylactic acid film to be harmful to the anion of anionic dye waste water
The contact and absorption of material；Purified treatment effect to anionic dye waste water is good.
2nd, the strong basicity micromolecular compound containing polyamino is added in the material liquid of the electrostatic spinning of the inventive method and is contained
The silane coupler of amino so that substantial amounts of amino on the polylactic acid fiber surface band that electrostatic spinning is obtained, is realized to poly- breast
Sour fiber it is cation-modified.In use, a large amount of amino of polylactic acid fiber surface, protonate into amino cation in water,
There is the interaction of stronger charge attraction between the anion in anionic dye waste water, and then significantly improve poly- breast
Absorption of the sour fiber to anionic dye waste water, detergent power.
3rd, the inventive method is used as thin film preparation process using electrostatic spinning technique.This method reaction condition is gentle, equipment
It is general, prepare cost low.Its technique is simply controllable, can regulate and control fibre structure parameter by regulating and controlling the outer field actions such as voltage, such as fine
Tie up diameter, Inter-fiber voids size, film porosity etc..
It is demonstrated experimentally that polylactic acid porous film prepared by the present invention has very to anionic dyes-Congo red solution
After high suction-operated, absorption 48h, its adsorbance reaches 73.53mg/g.
Further, the strong basicity micromolecular compound of the invention containing polyamino is ethylenediamine, diethylenetriamine, triethylene
One or more kinds of mixtures in tetramine；
The silane coupler containing amino of the present invention is gamma-aminopropyl-triethoxy-silane, γ-aminopropyl trimethoxy silicon
Alkane or aminoethyl imido propyl group dimethyl silicone polymer.
Experiment is proved：
The above-mentioned strong basicity micromolecular compound containing polyamino of certain content is added in electrostatic spinning solution, Bu Huiying
The electrostatic polymerization film formation of PLA is rung, while can combine well in polylactic acid fiber surface, is made on polylactic acid fiber surface band
Substantial amounts of amino.
These silane couplers containing amino, also can acid fiber by polylactic while ensureing to promote poly lactic acid polymerized film forming
Surface takes substantial amounts of amino.And then significantly improve absorption of the acid fiber by polylactic to anionic dye waste water, detergent power.
Further, the electrostatic potential of electrostatic spinning of the invention is 10.78~15.65kV.
Under this condition, the wire vent that PLA can be continuous on electrostatic spinning machine and stable, and promote solvent in Static Spinning
During volatilization, so as to prepare the film with good loose structure.
The present invention is described in further details with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the scanning electron microscope (SEM) photograph of polylactic acid film made from the embodiment of the present invention one.
Fig. 2 is polylactic acid film made from polylactic acid film made from embodiment one and comparative example to anionic dye-just
The adsorption curve that the solution of arnotto is changed over time.
Embodiment
The present invention is described in further details with reference to the accompanying drawings and detailed description.
Embodiment one
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 5.67:1 volume ratio is configured to mixed solvent, by 20 parts of weights
PLA and the 0.2 part heavy micromolecular compound of the strong basicity containing polyamino-diethylenetriamine add 100 parts of heavy mixing
In solvent, in 36 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, add 0.9 part heavy silane coupler-gamma-aminopropyl-triethoxy-silane containing amino into mixed liquor and exist
36 DEG C of stirred in water bath 1.2h, obtains PLA electrostatic spinning solution；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 15.65kV.
Fig. 1 is the scanning electron microscope (SEM) photograph of polylactic acid porous film made from this example.Gather breast made from this example as can be seen from Figure 1
Sour porous membrane has obvious multi-stage pore structure, and the specific surface area of material is big.
Comparative example one
For the absorption property to polylactic acid porous film produced by the present invention, it is prepared for not using almost identical technique
Modified pure polylactic acid film.Its preparation process is as follows：
Dichloromethane and N,N-dimethylformamide are pressed 5.67:1 volume ratio is configured to mixed solvent, will be 20 parts heavy
PLA adds 100 parts of heavy in the mixed solvents, and in 36 DEG C of stirred in water bath, stirring to PLA is all dissolved, must mixed
Liquid；
Using mixed liquor as the material liquid of electrostatic spinning, it is to prepare polylactic acid porous film to carry out electrostatic spinning.It is quiet
The electrostatic potential of Electrospun is 15.65kV.
Embodiment one and the comparative example adsorption curve Congo red to same concentrations be as shown in Figure 1 b, it is seen that embodiment one changes
Property acid fiber by polylactic is greatly improved than the absorption property of the pure acid fiber by polylactic of comparative example.
Embodiment two：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 9:1 volume ratio is configured to mixed solvent, will be 25 parts heavy
It is molten that PLA and the micromolecular compound of the strong basicity containing polyamino 0.3 part heavy-diethylenetriamine add 100 parts of heavy mixing
In agent, in 38 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, add 1.2 parts heavy silane coupler-gamma-aminopropyl-triethoxy-silane containing amino into mixed liquor and exist
38 DEG C of stirred in water bath 1.3h, obtains PLA electrostatic spinning solution；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 14.34kV.
Embodiment three：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 5.67:1 volume ratio is configured to mixed solvent, by 15 parts of weights
PLA and the 0.4 part heavy micromolecular compound of the strong basicity containing polyamino-diethylenetriamine add 100 parts of heavy mixing
In solvent, in 30 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, add 0.6 part heavy silane coupler-γ-aminopropyltrimethoxysilane containing amino into mixed liquor and exist
35 DEG C of stirred in water bath 0.8h, obtains PLA electrostatic spinning solution；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 12.21kV.
Example IV：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 4:1 volume ratio is configured to mixed solvent, will be 22 parts heavy
PLA and the micromolecular compound of the strong basicity containing polyamino 0.2 part heavy-ethylenediamine add 100 parts of heavy in the mixed solvents,
In 38 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, add 1.2 parts heavy silane coupler-γ-aminopropyltrimethoxysilane containing amino into mixed liquor and exist
38 DEG C of stirred in water bath 1.3h, obtains PLA electrostatic spinning solution；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 11.45kV.
Embodiment five：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 5.67:1 volume ratio is configured to mixed solvent, by 20 parts of weights
PLA and the 0.1 part heavy micromolecular compound of the strong basicity containing polyamino-divinyl triammonium add 100 parts of heavy mixing
In solvent, in 36 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, add 0.9 part heavy silane coupler-gamma-aminopropyl-triethoxy-silane containing amino into mixed liquor and exist
36 DEG C of stirred in water bath 0.8h, obtains PLA electrostatic spinning solution；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 14.65kV.
Embodiment six：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 5.67:1 volume ratio is configured to mixed solvent, by 20 parts of weights
PLA and the 0.4 part heavy micromolecular compound of the strong basicity containing polyamino-ethylenediamine add 100 parts of heavy mixed solvents
In, in 33 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, add 0.6 part heavy silane coupler-gamma-aminopropyl-triethoxy-silane containing amino into mixed liquor and exist
36 DEG C of stirred in water bath 0.9h, obtains PLA electrostatic spinning solution；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 10.78kV.
Embodiment seven：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 5.67:1 volume ratio is configured to mixed solvent, by 20 parts of weights
PLA and the micromolecular compound of the strong basicity containing polyamino-ethylenediamine 0.3 part heavy and triethylene tetramine by volume 1：
1 mixture, adds 100 parts of heavy in the mixed solvents, and in 33 DEG C of stirred in water bath, stirring to PLA is all dissolved, obtained
Mixed liquor；
B, the addition silane coupler containing amino-aminoethyl imido propyl group poly dimethyl silicon 0.9 part heavy into mixed liquor
Oxygen alkane obtains PLA electrostatic spinning solution in 36 DEG C of stirred in water bath 1h；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 12.36kV.
Embodiment eight：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 5.67:1 volume ratio is configured to mixed solvent, by 20 parts of weights
PLA and the 0.4 part heavy micromolecular compound of the strong basicity containing polyamino-second diene triamine, triethylene tetramine, ethylenediamine
By volume 1：1：1 mixture, adds 100 parts of heavy in the mixed solvents, in 35 DEG C of stirred in water bath, stirring to PLA
All dissolving, obtains mixed liquor；
B, add 0.9 part heavy silane coupler-gamma-aminopropyl-triethoxy-silane containing amino into mixed liquor and exist
35 DEG C of stirred in water bath 1.1h, obtains PLA electrostatic spinning solution；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 15.51kV.
Embodiment nine：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 9:1 volume ratio is configured to mixed solvent, will be 22 parts heavy
It is molten that PLA and the micromolecular compound of the strong basicity containing polyamino 0.4 part heavy-triethylene tetramine add 100 parts of heavy mixing
In agent, in 35 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, the addition silane coupler containing amino-aminoethyl imido propyl group polydimethylsiloxanes 1 part heavy into mixed liquor
Alkane obtains PLA electrostatic spinning solution in 35 DEG C of stirred in water bath 1.1h；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 14.56kV.
Embodiment ten：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 4:1 volume ratio is configured to mixed solvent, will be 20 parts heavy
It is molten that PLA and the micromolecular compound of the strong basicity containing polyamino 0.4 part heavy-triethylene tetramine add 100 parts of heavy mixing
In agent, in 35 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, the addition silane coupler containing amino-aminoethyl imido propyl group poly dimethyl silicon 1.1 parts heavy into mixed liquor
Oxygen alkane obtains PLA electrostatic spinning solution in 35 DEG C of stirred in water bath 1.3h；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 13.36kV.
Embodiment 11：
A kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed 9:1 volume ratio is configured to mixed solvent, will be 22 parts heavy
PLA and the micromolecular compound of the strong basicity containing polyamino 0.3 part heavy-second diene triamine, triethylene tetramine, ethylenediamine are pressed
Volume ratio 1：0.5：1 mixture, adds 100 parts of heavy in the mixed solvents, in 37 DEG C of stirred in water bath, stirring to PLA
All dissolving, obtains mixed liquor；
B, the addition silane coupler containing amino-aminoethyl imido propyl group poly dimethyl silicon 0.9 part heavy into mixed liquor
Oxygen alkane obtains PLA electrostatic spinning solution in 37 DEG C of stirred in water bath 0.9h；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is to prepare poly- breast to carry out electrostatic spinning
Sour porous membrane.The electrostatic potential of electrostatic spinning is 13.39kV.
Claims (3)
1. a kind of preparation method of the polylactic acid porous film handled for anionic dye waste water, its step is as follows：
A, dichloromethane and N,N-dimethylformamide pressed into 4-9:1 volume ratio is configured to mixed solvent, by 15~25 parts of weights
PLA and the strong basicity micromolecular compound containing polyamino of 0.1~0.4 part of weight add 100 parts of heavy in the mixed solvents,
In 30~38 DEG C of stirred in water bath, stirring to PLA is all dissolved, and obtains mixed liquor；
B, stirred in water bath 0.8- of the silane coupler containing amino at 30~38 DEG C for adding into mixed liquor 0.6-1.2 parts of weights
1.3h, obtains PLA electrostatic spinning solution；
C, using PLA electrostatic spinning solution as the material liquid of electrostatic spinning, it is that to prepare PLA more to carry out electrostatic spinning
Hole film.
2. a kind of preparation side of polylactic acid porous film handled for anionic dye waste water according to claim 1
Method, it is characterised in that：
The described strong basicity micromolecular compound containing polyamino is one kind in ethylenediamine, diethylenetriamine, triethylene tetramine
Or more than one mixture；
The described silane coupler containing amino is gamma-aminopropyl-triethoxy-silane, γ-aminopropyltrimethoxysilane or ammonia
Ethyl imido propyl group dimethyl silicone polymer.
3. a kind of preparation side of polylactic acid porous film handled for anionic dye waste water according to claim 1
Method, it is characterised in that：The electrostatic potential of described electrostatic spinning is 10.78~15.65kV.
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Cited By (4)
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| CN108660614A (en) * | 2018-05-22 | 2018-10-16 | 西南交通大学 | A kind of polylactic acid porous film and preparation method thereof |
| CN109281063A (en) * | 2018-11-12 | 2019-01-29 | 江苏师范大学 | A kind of preparation method and application of the organic silicon fibre film containing secondary amino group |
| CN110841611A (en) * | 2019-09-30 | 2020-02-28 | 浙江海洋大学 | Application of modified mussel shell to adsorption of methylene blue |
| CN111545177A (en) * | 2020-04-15 | 2020-08-18 | 济南大学 | Preparation method of modified magnetic bamboo fiber composite adsorbent |
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| CN108660614A (en) * | 2018-05-22 | 2018-10-16 | 西南交通大学 | A kind of polylactic acid porous film and preparation method thereof |
| CN108660614B (en) * | 2018-05-22 | 2020-04-03 | 西南交通大学 | Polylactic acid porous film and preparation method thereof |
| CN109281063A (en) * | 2018-11-12 | 2019-01-29 | 江苏师范大学 | A kind of preparation method and application of the organic silicon fibre film containing secondary amino group |
| CN110841611A (en) * | 2019-09-30 | 2020-02-28 | 浙江海洋大学 | Application of modified mussel shell to adsorption of methylene blue |
| CN110841611B (en) * | 2019-09-30 | 2021-11-09 | 浙江海洋大学 | Application of modified mussel shell to adsorption of methylene blue |
| CN111545177A (en) * | 2020-04-15 | 2020-08-18 | 济南大学 | Preparation method of modified magnetic bamboo fiber composite adsorbent |
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