CN110090568A - A kind of natural timber base/polyamide composite film - Google Patents
A kind of natural timber base/polyamide composite film Download PDFInfo
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- CN110090568A CN110090568A CN201910313819.6A CN201910313819A CN110090568A CN 110090568 A CN110090568 A CN 110090568A CN 201910313819 A CN201910313819 A CN 201910313819A CN 110090568 A CN110090568 A CN 110090568A
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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
- 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
- B01D69/125—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction
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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
- B01D71/10—Cellulose; Modified cellulose
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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
- B01D71/56—Polyamides, e.g. polyester-amides
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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
- B01D2325/24—Mechanical properties, e.g. strength
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- Chemical Kinetics & Catalysis (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a kind of natural timber base/polyamide composite films.The composite membrane is to construct polyamide ultrathin film on the surface of natural timber thin slice using interfacial polymerization, be combined by the two.This method has organically combined the advantage of excellent hydrophilic possessed by natural timber itself and natural vertical channel and polyamide ultrathin film in terms of cutting salt.The features such as water flux of superelevation, extremely low interior concentration polarization degree, higher salt-stopping rate and excellent mechanical performance is presented in the present invention.The cost of material of natural timber base/polyamide composite film provided by the invention is low, long service life, superior performance, provided preparation method is simple, easily operated, mild condition, is suitable for preparation nanofiltration membrane, forward osmosis membrane, reverse osmosis membrane, pressure retarded osmosis film etc..
Description
Technical field
The invention belongs to polymeric membrane isolation technics manufacturing field more particularly to a kind of natural timber base/polyamide are compound
Film composite membrane.
Background technique
Existing research shows that using the performance of the different controllable thin-film composite membranes of film-forming method and interfacial polymerization.In
State patent CN108795029A disclose it is a kind of prepare polyamide/chitosan mixed film method and application, by polyamide
It is added in solution after chitosan and obtains polyamide/chitosan mixed film using electrostatic field, method is simple, improves the mechanics of film
Performance, but the water flux of film is promoted not counting too big.Chinese patent CN108339403A discloses a kind of with unsymmetric structure
The composite polyamide forward osmosis membrane of sandwich structure has separately designed high-throughput polyamide separating layer in the two sides of polysulfone supporting layer
With highly selective polyamide separating layer, and the water phase and oily phase of the polyamide separating layer of polysulfone supporting layer two sides are improved, with
This guarantees the high throughput of film and highly selective, but its preparation process is cumbersome.In fact, due to the presence of interior concentration polarization, it is multiple
The water flux for closing film can constantly reduce, and the performance of film can be greatly diminished；And optimizes the internal structure of composite membrane, increases the water of film
Flux can reduce the influence of interior concentration polarization, promote film properties.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of natural timber base/polyamide composite films.
The purpose of the present invention is achieved through the following technical solutions: a kind of natural timber base/polyamide composite film, it
It is prepared by the following method to obtain:
(1) natural timber the wood chip with a thickness of 0.7~1.5mm is cut into be infiltrated after surface polishing with deionized water
And clean up, it is dry at 40~90 DEG C；
(2) wood chip in step (1) is immersed into 1~5min in chitosan solution, removes the chitosan solution of excess surface
1~5min is placed afterwards.The concentration of the chitosan solution is 1~10g/L；The solvent of the chitosan solution is water and acetic acid
Mixed solution, and the volume ratio of water and acetic acid is 97:3~99:1；
(3) polynary amine aqueous solution is uniformly sprayed at the wood chip surface that step (2) obtains, after standing 1~5min, removed more
Remaining polynary amine aqueous solution；Polynary acyl chlorides organic solution is uniformly sprayed on wood chip surface again, stands 0.5~5min, is removed more
Remaining polynary acyl chlorides organic solution；Then, 10~60min is dried at 50~90 DEG C in wood chip, obtain natural timber base/
Polyamide composite film.
Further, the natural timber in the step (1) is linden, poplar, birch, beech, elm.
Further, the wood chip cutting mode be parallel or perpendicular to arboreal growth direction, or with arboreal growth side
It is made to any angle cutting.
Further, the deacetylation of the chitosan in the step (2) is 70~100%.
Further, the molecular weight of the chitosan in the step (2) is in 2000~200000g/mol.
Further, the mass concentration of the polynary amine aqueous solution in the step (3) is 0.01~1%.
Further, in the polynary acyl chlorides organic solution in the step (3) polynary acyl chlorides and organic solvent mass ratio
For 0.1:800~1:1000.
Further, the polyamine in the step (3) by m-phenylene diamine (MPD), o-phenylenediamine, p-phenylenediamine, equal benzene triamine,
One or more of derivative of piperazine and piperazine is by any proportion mixing composition.
Further, the polynary acyl chlorides in the step (3) is by pyromellitic trimethylsilyl chloride, m-phthaloyl chloride, O-phthalic
One or more of acyl chlorides and paraphthaloyl chloride are by any proportion mixing composition.
Further, the organic solvent in the polynary acyl chlorides organic solution in the step (3) by normal heptane, n-hexane,
One or more of hexamethylene, naphthalene, Isopar-G and Isopar-E are by any proportion mixing composition.
The invention has the benefit that the present invention using wood chip as substrate, obtains natural timber base/poly- after interfacial polymerization
Amide composite membrane；Preparation method of the invention is easy to operate, mild condition；The natural timber that the present invention uses is from a wealth of sources, at
This is cheap, environmentally protective, is suitable for preparation nanofiltration membrane, forward osmosis membrane, reverse osmosis membrane, pressure retarded osmosis film etc.；Present invention tool
There is the characteristics of interior concentration polarization is small, water flux is high, high mechanical strength, long service life, nanofiltration, reverse osmosis, just can be applied to
The processes such as infiltration, pressure retarded osmosis.
Detailed description of the invention
Fig. 1 is natural timber base/polyamide composite film scanning electron microscope diagram.
Specific embodiment
The present invention is described in more detail by following embodiment and attached drawing, but the embodiment and attached drawing are not constituted pair
Limitation of the invention.
Embodiment 1
By 5g molecular weight be 10000g/mol, the chitosan of deacetylation 90% is dissolved in 1L water/acetic acid (volume ratio 99:1)
Mixed solution in, heating stirring to chitosan dissolve.Along the linden wood for the 1mm thickness cut perpendicular to arboreal growth direction
Piece is submerged initially in infiltration in deionized water after surface polishing and washes away impurity, and the smooth chitosan of immersion downwards is molten after drying at 60 DEG C
3min in liquid places 2min after removing excess surface solution.M-phenylene diamine (MPD) aqueous solution is uniformly sprayed at wood chip surface, is stood
2min is removed and the organic solution of pyromellitic trimethylsilyl chloride is uniformly sprayed at wood chip surface after extra solution, and it is more to place 1min removal
30min is dried at 70 DEG C in wood chip after remaining solution.M-phenylene diamine (MPD) aqueous solution is uniformly then sprayed at above-mentioned wood chip table
Face, so that m-phenylene diamine (MPD) aqueous solution is sufficiently deposited on the PA layer of wood chip surface, again by equal benzene after placement 2min removal redundant solution
The organic solution of three formyl chlorides is carefully uniformly sprayed at wood chip surface, place after wood chip 1min removal redundant solution at 70 DEG C into
Row drying.It obtains using linden as the natural timber of substrate base/polyamide composite film.Thus obtained natural timber base/polyamides
Amine composite membrane, can be used as forward osmosis membrane.
By the mass change value of feeding liquid in the analytical unit time, the water for calculating forward osmosis membrane according to formula (1) is logical
Measure JW(L/m2h)；By the conductivity variations value of feeding liquid in the conductivity meter analytical unit time, positive seep is measured according to formula (2)
The reversed flux salt J of permeable membraneS(g/m2h)。
Δ V (L) is that water enters the volume for drawing liquid from feeding liquid through film；Δ t (h) is the testing time；A(m2) it is effective
Membrane area.
Ct、VtThe salinity and volume of feeding liquid respectively in a period of time.
Measurement result are as follows: at 25 DEG C, when drawing liquid, deionized water as feeding liquid using the NaCl aqueous solution of 1mol/L,
The water flux of forward osmosis membrane is 167.6Lm-2·h-1, reversed flux salt is 0.79gm-2·h-1。
Embodiment 2
By 5g molecular weight be 10000g/mol, the chitosan of deacetylation 90% is dissolved in 1L water/acetic acid (volume ratio 99:1)
Mixed solution in, heating stirring to chitosan dissolve.Along the linden wood for the 1mm thickness cut perpendicular to arboreal growth direction
Piece is submerged initially in infiltration in deionized water after surface polishing and washes away impurity, and the smooth chitosan of immersion downwards is molten after drying at 60 DEG C
3min in liquid places 2min after removing excess surface solution.M-phenylene diamine (MPD) aqueous solution is uniformly sprayed at wood chip surface, is stood
2min is removed and the organic solution of pyromellitic trimethylsilyl chloride is uniformly sprayed at wood chip surface after extra solution, and it is more to place 1min removal
60min is dried at 70 DEG C in wood chip after remaining solution.M-phenylene diamine (MPD) aqueous solution is uniformly then sprayed at above-mentioned wood chip table
Face, so that m-phenylene diamine (MPD) aqueous solution is sufficiently deposited on the PA layer of wood chip surface, again by equal benzene after placement 2min removal redundant solution
The organic solution of three formyl chlorides is carefully uniformly sprayed at wood chip surface, place after wood chip 1min removal redundant solution at 70 DEG C into
Row drying.It obtains using linden as the natural timber of substrate base/polyamide composite film.Thus obtained natural timber base/polyamides
Amine composite membrane, can be used as forward osmosis membrane.
Measurement result are as follows: at 25 DEG C, the water penetration flux of forward osmosis membrane is 197.2Lm-2·h-1, reversed flux salt is
38.8g·m-2·h-1。
Embodiment 3
By 5g molecular weight be 10000g/mol, the chitosan of deacetylation 90% is dissolved in 1L water/acetic acid (volume ratio 99:1)
Mixed solution in, heating stirring to chitosan dissolve.Along the linden wood for the 1mm thickness cut perpendicular to arboreal growth direction
Piece is submerged initially in infiltration in deionized water after surface polishing and washes away impurity, and the smooth chitosan of immersion downwards is molten after drying at 60 DEG C
3min in liquid places 2min after removing excess surface solution.M-phenylene diamine (MPD) aqueous solution is uniformly sprayed at wood chip surface, is stood
2min is removed and the organic solution of pyromellitic trimethylsilyl chloride is uniformly sprayed at wood chip surface after extra solution, and it is more to place 1min removal
15min is dried at 70 DEG C in wood chip after remaining solution.M-phenylene diamine (MPD) aqueous solution is uniformly then sprayed at above-mentioned wood chip table
Face, so that m-phenylene diamine (MPD) aqueous solution is sufficiently deposited on the PA layer of wood chip surface, again by equal benzene after placement 2min removal redundant solution
The organic solution of three formyl chlorides is carefully uniformly sprayed at wood chip surface, place after wood chip 1min removal redundant solution at 70 DEG C into
Row drying.It obtains using linden as the natural timber of substrate base/polyamide composite film.Thus obtained natural timber base/polyamides
Amine composite membrane, can be used as forward osmosis membrane.
Measurement result are as follows: at 25 DEG C, the water penetration flux of forward osmosis membrane is 228.6Lm-2·h-1, reversed flux salt is
175.5g·m-2·h-1。
Embodiment 4
By 5g molecular weight be 10000g/mol, the chitosan of deacetylation 90% is dissolved in 1L water/acetic acid (volume ratio 99:1)
Mixed solution in, heating stirring to chitosan dissolve.Along the linden wood for the 1mm thickness cut perpendicular to arboreal growth direction
Piece is submerged initially in infiltration in deionized water after surface polishing and washes away impurity, and the smooth chitosan of immersion downwards is molten after drying at 60 DEG C
3min in liquid places 2min after removing excess surface solution.M-phenylene diamine (MPD) aqueous solution is uniformly sprayed at wood chip surface, is stood
2min is removed and the organic solution of pyromellitic trimethylsilyl chloride is uniformly sprayed at wood chip surface after extra solution, and it is more to place 5min removal
30min is dried at 70 DEG C in wood chip after remaining solution.M-phenylene diamine (MPD) aqueous solution is uniformly then sprayed at above-mentioned wood chip table
Face, so that m-phenylene diamine (MPD) aqueous solution is sufficiently deposited on the PA layer of wood chip surface, again by equal benzene after placement 2min removal redundant solution
The organic solution of three formyl chlorides is carefully uniformly sprayed at wood chip surface, place after wood chip 1min removal redundant solution at 70 DEG C into
Row drying.It obtains using linden as the natural timber of substrate base/polyamide composite film.Thus obtained natural timber base/polyamides
Amine composite membrane, can be used as forward osmosis membrane.
Measurement result are as follows: at 25 DEG C, the water penetration flux of forward osmosis membrane is 159.2Lm-2·h-1, reversed flux salt
For 28.1gm-2·h-1。
Embodiment 5
By 5g molecular weight be 10000g/mol, the chitosan of deacetylation 90% is dissolved in 1L water/acetic acid (volume ratio 99:1)
Mixed solution in, heating stirring to chitosan dissolve.Along the linden wood for the 1mm thickness cut perpendicular to arboreal growth direction
Piece is submerged initially in infiltration in deionized water after surface polishing and washes away impurity, and the smooth chitosan of immersion downwards is molten after drying at 60 DEG C
3min in liquid places 2min after removing excess surface solution.M-phenylene diamine (MPD) aqueous solution is uniformly sprayed at wood chip surface, is stood
2min is removed and the organic solution of pyromellitic trimethylsilyl chloride is uniformly sprayed at wood chip surface after extra solution, places 0.5min removal
30min is dried at 70 DEG C in wood chip after redundant solution.M-phenylene diamine (MPD) aqueous solution is uniformly then sprayed at above-mentioned wood chip
Surface, so that m-phenylene diamine (MPD) aqueous solution is sufficiently deposited on the PA layer of wood chip surface, placing again will be equal after 2min removes redundant solution
The organic solution of three formyl chloride of benzene is carefully uniformly sprayed at wood chip surface, places after wood chip 1min removal redundant solution at 70 DEG C
It is dried.It obtains using linden as the natural timber of substrate base/polyamide composite film.Thus obtained natural timber base/poly-
Amide composite membrane, can be used as forward osmosis membrane.
Measurement result are as follows: at 25 DEG C, the water penetration flux of forward osmosis membrane is 185.5Lm-2·h-1, reversed flux salt
For 33.4gm-2·h-1。
Embodiment 6
By 5g molecular weight be 10000g/mol, the chitosan of deacetylation 90% is dissolved in 1L water/acetic acid (volume ratio 99:1)
Mixed solution in, heating stirring to chitosan dissolve.Along the linden wood for the 1mm thickness cut perpendicular to arboreal growth direction
Piece is submerged initially in infiltration in deionized water after surface polishing and washes away impurity, and the smooth chitosan of immersion downwards is molten after drying at 60 DEG C
1min in liquid places 2min after removing excess surface solution.M-phenylene diamine (MPD) aqueous solution is uniformly sprayed at wood chip surface, is stood
2min is removed and the organic solution of pyromellitic trimethylsilyl chloride is uniformly sprayed at wood chip surface after extra solution, and it is more to place 1min removal
30min is dried at 70 DEG C in wood chip after remaining solution.M-phenylene diamine (MPD) aqueous solution is uniformly then sprayed at above-mentioned wood chip table
Face, so that m-phenylene diamine (MPD) aqueous solution is sufficiently deposited on the PA layer of wood chip surface, again by equal benzene after placement 2min removal redundant solution
The organic solution of three formyl chlorides is carefully uniformly sprayed at wood chip surface, place after wood chip 1min removal redundant solution at 70 DEG C into
Row drying.It obtains using linden as the natural timber of substrate base/polyamide composite film.Thus obtained natural timber base/polyamides
Amine composite membrane, can be used as forward osmosis membrane.
Measurement result are as follows: at 25 DEG C, the water penetration flux of forward osmosis membrane is 191.5Lm-2·h-1, reversed flux salt
For 35.3gm-2·h-1。
Embodiment 7
By 5g molecular weight be 10000g/mol, the chitosan of deacetylation 90% is dissolved in 1L water/acetic acid (volume ratio 99:1)
Mixed solution in, heating stirring to chitosan dissolve.Along the linden wood for the 1mm thickness cut perpendicular to arboreal growth direction
Piece is submerged initially in infiltration in deionized water after surface polishing and washes away impurity, and the smooth chitosan of immersion downwards is molten after drying at 60 DEG C
5min in liquid places 2min after removing excess surface solution.M-phenylene diamine (MPD) aqueous solution is uniformly sprayed at wood chip surface, is stood
2min is removed and the organic solution of pyromellitic trimethylsilyl chloride is uniformly sprayed at wood chip surface after extra solution, and it is more to place 1min removal
30min is dried at 70 DEG C in wood chip after remaining solution.M-phenylene diamine (MPD) aqueous solution is uniformly then sprayed at above-mentioned wood chip table
Face, so that m-phenylene diamine (MPD) aqueous solution is sufficiently deposited on the PA layer of wood chip surface, again by equal benzene after placement 2min removal redundant solution
The organic solution of three formyl chlorides is carefully uniformly sprayed at wood chip surface, place after wood chip 1min removal redundant solution at 70 DEG C into
Row drying.It obtains using linden as the natural timber of substrate base/polyamide composite film.Thus obtained natural timber base/polyamides
Amine composite membrane, can be used as forward osmosis membrane.
Measurement result are as follows: at 25 DEG C, the water penetration flux of forward osmosis membrane is 148.7Lm-2·h-1, reversed flux salt
For 25.7gm-2·h-1。
Embodiment 8
By 5g molecular weight be 10000g/mol, the chitosan of deacetylation 90% is dissolved in 1L water/acetic acid (volume ratio 99:1)
Mixed solution in, heating stirring to chitosan dissolve.Along the linden wood for the 1mm thickness cut perpendicular to arboreal growth direction
Piece is submerged initially in infiltration in deionized water after surface polishing and washes away impurity, and the smooth chitosan of immersion downwards is molten after drying at 60 DEG C
3min in liquid places 2min after removing excess surface solution.M-phenylene diamine (MPD) aqueous solution is uniformly sprayed at wood chip surface, is stood
2min is removed and the organic solution of pyromellitic trimethylsilyl chloride is uniformly sprayed at wood chip surface after extra solution, and it is more to place 1min removal
30min is dried at 50 DEG C in wood chip after remaining solution.M-phenylene diamine (MPD) aqueous solution is uniformly then sprayed at above-mentioned wood chip table
Face, so that m-phenylene diamine (MPD) aqueous solution is sufficiently deposited on the PA layer of wood chip surface, again by equal benzene after placement 2min removal redundant solution
The organic solution of three formyl chlorides is carefully uniformly sprayed at wood chip surface, place after wood chip 1min removal redundant solution at 50 DEG C into
Row drying.It obtains using linden as the natural timber of substrate base/polyamide composite film.Thus obtained natural timber base/polyamides
Amine composite membrane, can be used as forward osmosis membrane.
Measurement result are as follows: at 25 DEG C, the water penetration flux of forward osmosis membrane is 223.2Lm-2·h-1, reversed flux salt
For 44.8gm-2·h-1。
Embodiment 9
By 5g molecular weight be 10000g/mol, the chitosan of deacetylation 90% is dissolved in 1L water/acetic acid (volume ratio 99:1)
Mixed solution in, heating stirring to chitosan dissolve.Along the linden wood for the 1mm thickness cut perpendicular to arboreal growth direction
Piece is submerged initially in 30min infiltration in deionized water after surface polishing and washes away impurity, smooth after drying at 60 DEG C to immerse shell downwards
3min in glycan solution places 2min after removing excess surface solution.M-phenylene diamine (MPD) aqueous solution is uniformly sprayed at wood chip surface,
It stands 2min and removes and the organic solution of pyromellitic trimethylsilyl chloride is uniformly sprayed at wood chip surface after extra solution, place 1min and go
Except 30min is dried at 90 DEG C in wood chip after redundant solution.M-phenylene diamine (MPD) aqueous solution is uniformly then sprayed at above-mentioned wood
Again will after placing 2min removal redundant solution so that m-phenylene diamine (MPD) aqueous solution is sufficiently deposited on the PA layer of wood chip surface on piece surface
The organic solution of pyromellitic trimethylsilyl chloride is carefully uniformly sprayed at wood chip surface, places after wood chip 1min removal redundant solution at 90 DEG C
Under be dried.It obtains using linden as the natural timber of substrate base/polyamide composite film.Thus obtained natural timber base/
Polyamide composite film can be used as forward osmosis membrane.
Measurement result are as follows: at 25 DEG C, the water penetration flux of forward osmosis membrane is 172.6Lm-2·h-1, reversed flux salt
For 3.4gm-2·h-1。
Claims (10)
1. a kind of natural timber base/polyamide composite film, which is characterized in that it is prepared by the following method to obtain:
(1) natural timber is cut into the wood chip with a thickness of 0.7~1.5mm, after surface polishing, is infiltrated with deionized water and clear
Wash clean, it is dry at 40~90 DEG C.
(2) wood chip in step (1) is immersed into 1~5min in chitosan solution, is put after removing the chitosan solution of excess surface
Set 1~5min.The concentration of the chitosan solution is 1~10g/L；The solvent of the chitosan solution is the mixing of water and acetic acid
Solution, and the volume ratio of water and acetic acid is 97:3~99:1.
(3) polynary amine aqueous solution is uniformly sprayed at the wood chip surface that step (2) obtains, after standing 1~5min, it is extra to remove
Polynary amine aqueous solution；Polynary acyl chlorides organic solution is uniformly sprayed on wood chip surface again, stands 0.5~5min, it is extra to remove
Polynary acyl chlorides organic solution；Then, 10~60min is dried at 50~90 DEG C in wood chip, obtains natural timber base/polyamides
Amine composite membrane.
2. natural timber base/polyamide composite film according to claim 1, which is characterized in that the day in the step (1)
Right timber is linden, poplar, birch, beech, elm.
3. natural timber base/polyamide composite film according to claim 1, which is characterized in that the wood chip cutting side
Formula is to be made parallel or perpendicular to arboreal growth direction, or with arboreal growth direction with any angle cutting.
4. natural timber base/polyamide composite film according to claim 1, which is characterized in that the shell in the step (2)
The deacetylation of glycan is 70~100%.
5. natural timber base/polyamide composite film according to claim 1, which is characterized in that the shell in the step (2)
The molecular weight of glycan is in 2000~200000g/mol.
6. natural timber base/polyamide composite film according to claim 1, which is characterized in that more in the step (3)
The mass concentration of first amine aqueous solution is 0.01~1%.
7. natural timber base/polyamide composite film according to claim 1, which is characterized in that more in the step (3)
The mass ratio of polynary acyl chlorides and organic solvent is 0.1:800~1:1000 in first acyl chlorides organic solution.
8. natural timber base/polyamide composite film according to claim 1, which is characterized in that more in the step (3)
First amine is pressed by one or more of m-phenylene diamine (MPD), o-phenylenediamine, p-phenylenediamine, equal benzene triamine, piperazine and derivative of piperazine
Any proportion mixing composition.
9. natural timber base/polyamide composite film according to claim 1, which is characterized in that more in the step (3)
First acyl chlorides is pressed by one or more of pyromellitic trimethylsilyl chloride, m-phthaloyl chloride, o-phthaloyl chloride and paraphthaloyl chloride
Any proportion mixing composition.
10. natural timber base/polyamide composite film according to claim 1, which is characterized in that in the step (3)
Organic solvent in polynary acyl chlorides organic solution is by normal heptane, n-hexane, hexamethylene, naphthalene, Isopar-G and Isopar-E
One or more are by any proportion mixing composition.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113477104A (en) * | 2021-06-01 | 2021-10-08 | 江苏大学 | Preparation method and application of bionic basswood-based three-dimensional-porous molecularly imprinted nano composite membrane |
| CN113731186A (en) * | 2021-08-23 | 2021-12-03 | 广西大学 | Preparation method of metal nanoparticle/lignocellulose-based functionalized filter membrane for treating wastewater |
| CN115193268A (en) * | 2022-06-28 | 2022-10-18 | 南京林业大学 | Photoresponse type intelligent wood film and preparation method and application thereof |
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| CN113477104A (en) * | 2021-06-01 | 2021-10-08 | 江苏大学 | Preparation method and application of bionic basswood-based three-dimensional-porous molecularly imprinted nano composite membrane |
| CN113731186A (en) * | 2021-08-23 | 2021-12-03 | 广西大学 | Preparation method of metal nanoparticle/lignocellulose-based functionalized filter membrane for treating wastewater |
| CN115193268A (en) * | 2022-06-28 | 2022-10-18 | 南京林业大学 | Photoresponse type intelligent wood film and preparation method and application thereof |
| CN115193268B (en) * | 2022-06-28 | 2023-11-03 | 南京林业大学 | Light response type intelligent wood film and preparation method and application thereof |
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