CN111234304A - Polyaniline @ silver nanowire/polyimide porous gradient composite film, preparation method and application - Google Patents
Polyaniline @ silver nanowire/polyimide porous gradient composite film, preparation method and application Download PDFInfo
- Publication number
- CN111234304A CN111234304A CN202010073111.0A CN202010073111A CN111234304A CN 111234304 A CN111234304 A CN 111234304A CN 202010073111 A CN202010073111 A CN 202010073111A CN 111234304 A CN111234304 A CN 111234304A
- Authority
- CN
- China
- Prior art keywords
- composite film
- silver nanowire
- polyimide porous
- polyaniline
- gradient composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/40—Impregnation
- C08J9/42—Impregnation with macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/026—Wholly aromatic polyamines
- C08G73/0266—Polyanilines or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/40—Impregnation
- C08J9/405—Impregnation with polymerisable compounds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
- G01N27/126—Composition of the body, e.g. the composition of its sensitive layer comprising organic polymers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
- G01N27/127—Composition of the body, e.g. the composition of its sensitive layer comprising nanoparticles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/18—Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
- C08J2479/02—Polyamines
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- Nanotechnology (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a polyaniline @ silver nanowire/polyimide porous gradient composite film, a preparation method and application thereof. Compared with the prior art, the invention has the beneficial effects that: the porous structure effectively increases the specific surface area of the composite film, and the gradient structure ensures the composite filmThe film has good mechanical properties; the gradient composite film loaded with polyaniline realizes the construction of a three-dimensional network of a sensitive material, and greatly increases the adsorption active sites of target gas; having NO in pair2Sensitive response, good flexibility, high mechanical strength and the like.
Description
Technical Field
The invention relates to a special composite film for a flexible gas sensor, in particular to a polyaniline @ silver nanowire/polyimide porous gradient composite film, a preparation method and application.
Background
The flexible gas sensor has the advantages and wide application prospect superior to the traditional gas sensor in the aspects of wearable equipment, food health environment monitoring and the like. The core components of the flexible gas sensor are sensitive materials and a flexible substrate, and the current research is to deposit a layer of sensitive materials on the flexible substrate by chemical deposition, spraying and other methods, however, the structure can cause the phenomenon that the sensitive material layer is broken or falls off from the flexible substrate in the use process, so that the gas sensing performance is lost. Therefore, the improvement of the interaction between the sensitive material and the flexible substrate has important significance for improving the performance of the flexible gas sensor. However, embedding the sensitive material in a flexible matrix may prevent the sensitive material from contacting the gas.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a polyaniline @ silver nanowire/polyimide porous gradient composite film, a preparation method and application.
The invention is realized by the following technical scheme: a preparation method of a polyaniline @ silver nanowire/polyimide porous gradient composite film comprises the following operation steps:
(1) preparation of the blend: adding 0.1-1 g of sodium chloride and 0.05-0.2 g of silver nanowires into a polyamic acid/dimethyl formamide solution, and continuously stirring to uniformly disperse to form a blend;
(2) first spin coating: spin-coating the blend on a glass substrate to form a film, wherein the rotating speed is 700rmp/s, and the time is 70 s;
(3) and (3) spin coating for the second time: spin-coating polyamic acid/dimethylformamide solution which is not doped with sodium chloride and silver nanowires on the membrane, wherein the rotating speed is 700rmp/s, and the time is 50 s;
(4) and (3) curing: then, heating and curing are carried out, wherein,
maintaining at 100 deg.C for 10min, maintaining at 150 deg.C for 20min, maintaining at 180 deg.C for 15min, maintaining at 200 deg.C for 10min, and naturally cooling to room temperature to obtain composite film;
(5) removing the template: soaking the composite film in deionized water, maintaining stirring for 48h, taking out, and washing with the deionized water to obtain the silver nanowire/polyimide porous gradient composite film;
(6) surface hydrophilic treatment: then, immersing the silver nanowire/polyimide porous gradient composite film prepared in the step (5) into a sodium polystyrene sulfonate solution with the concentration of 0.01-0.1 mol/L for treatment for 30min to obtain a silver nanowire/polyimide porous gradient composite film subjected to hydrophilic treatment;
(7) adding 0.5-1.5 ml of aniline and 0.1mol/L HCl (HCl) in a volume of 0.5-1 ml into 100ml of deionized water, keeping the temperature at 0-4 ℃, and continuously stirring to obtain a dispersion liquid;
placing the silver nanowire/polyimide porous gradient composite film subjected to hydrophilic treatment in the step (6) into the dispersion, and dropwise adding (NH) with the volume of 2-8 ml and the concentration of 0.1g/ml4)2S2O8Aqueous solution, during which the temperature and the stirring speed are kept constant;
after the dropwise addition is finished, continuously stirring for 12-24 h, taking out the film, washing the film for multiple times by deionized water and ethanol respectively, and drying the film in vacuum at the temperature of 60 ℃ to obtain the polyaniline @ silver nanowire/polyimide gradient composite film.
Further, the viscosity of the polyamic acid/dimethylformamide solution in the step (1) is 500-1500 cP; the mass ratio of the sodium chloride to the polyamic acid to the silver nanowire is 0.1-1.1: 1: 0.25-0.8; the viscosity of the formed blend is 1500-2500 cP.
Further, the thickness of the thin film obtained by the first spin coating in the step (2) is 10-40 μm; the thickness of the film obtained by the spin coating in the second step in the step (4) is 7-25 μm.
The polyaniline @ silver nanowire/polyimide porous gradient composite film is prepared by the preparation method.
The polyaniline @ silver nanowire/polyimide porous gradient composite film is applied to a flexible gas sensor.
The principle of the invention is as follows:
gradient materials are heterogeneous materials in which the composition and structure of the material varies continuously in one direction, with the function of the material being graded in response to changes in composition and structure. The gas sensitive material needs to be in sufficient contact with the target gas and therefore requires a large specific surface area and exposed active adsorption sites, and therefore the porous structure is a good material morphology. Polyimide has excellent mechanical properties and chemical stability, and is an excellent flexible substrate material. Polyaniline acts as a p-type semiconductor when reacted with an oxidizing gas such as NO2When the contact is made, the number of holes is increased, so that the conductivity is increased, and good response performance is shown. Therefore, the film substrate has excellent mechanical property and can load gas-sensitive materials. The application provides a method for preparing a silver nanowire/polyimide composite film with the sizes and the number of air holes distributed in a gradient manner along the thickness direction by using sodium chloride as an air hole template through a two-step spin coating method based on a centrifugal method and a particle gradient arrangement method, and then loading polyaniline to obtain the composite film with good mechanical property and gas sensitivity. The gradient composite film is used as a flexible gas sensor and has the characteristics of adjustable specific surface area and excellent flexibility and mechanical properties.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention uses the good flexibility and mechanical property of the porous polyimide gradient composite film in the structural design of the flexible gas sensor. The porous structure effectively increases the specific surface area of the composite film, and the gradient structure ensures the good mechanical property of the composite film.
(2) The gradient composite film loaded with polyaniline realizes the construction of a three-dimensional network of the sensitive material, and greatly increases the adsorption active sites of the target gas.
(3) The prepared polyaniline @ silver nanowire/polyimide porous gradient composite film has NO-pair effect2Sensitive response, good flexibility, high mechanical strength and the like.
Drawings
Fig. 1 is an optical micrograph of the polyaniline @ silver nanowire/polyimide porous gradient composite film prepared in example 1.
Detailed Description
The production process of the present invention is further illustrated by the following examples, but the present invention is not limited to these examples. In the experimental methods of the following examples, unless otherwise specified, they are conventional methods; the materials used in the examples were purchased from conventional chemical agents, unless otherwise specified.
Example 1
The preparation method of the polyaniline @ silver nanowire/polyimide porous gradient composite film comprises the following steps:
(1) preparation of the blend: adding 0.1g of sodium chloride and 0.05g of silver nanowires into the polyamic acid/dimethylformamide solution, and continuously stirring to uniformly disperse to form a blend; wherein the mass ratio of the sodium chloride to the polyamic acid to the silver nanowire is 0.1: 1: 0.25; (2) first spin coating: spin-coating the blend on a glass substrate to form a film, wherein the rotating speed is 700rmp/s, and the time is 70 s; (3) and (3) spin coating for the second time: spin-coating polyamic acid/dimethylformamide solution which is not doped with sodium chloride and silver nanowires on the membrane, wherein the rotating speed is 700rmp/s, and the time is 50 s; (4) and (3) curing: heating and curing, wherein the temperature is maintained at 100 ℃ for 10min, the temperature is maintained at 150 ℃ for 20min, the temperature is maintained at 180 ℃ for 15min, the temperature is maintained at 200 ℃ for 10min, and then the composite film is naturally cooled to room temperature to obtain a composite film; (5) removing the template: soaking the composite film in deionized water, maintaining stirring for 48h, taking out, and washing with the deionized water to obtain the silver nanowire/polyimide porous gradient composite film; (6) surface hydrophilic treatment: then, immersing the silver nanowire/polyimide porous gradient composite film into a sodium polystyrene sulfonate solution with the concentration of 0.01mol/L for treatment for 30min to obtain a silver nanowire/polyimide porous gradient composite film after hydrophilic treatment; (7) adding 0.5ml aniline and 0.1mol/L HCl with volume of 0.5ml into 100ml deionized water, keeping 0 ℃ and continuously stirring to obtain dispersion; placing the silver nanowire/polyimide porous gradient composite film subjected to hydrophilic treatment in the step (6) into the dispersion, and dropwise adding (NH) with the volume of 2ml and the concentration of 0.1g/ml4)2S2O8Aqueous solutionDuring the period, the temperature and the stirring speed are kept unchanged; after the dropwise addition is finished, continuously stirring for 12h, taking out the film, washing the film for multiple times by deionized water and ethanol respectively, and then drying the film in vacuum at the temperature of 60 ℃ to obtain the polyaniline @ silver nanowire/polyimide gradient composite film.
Example 2
The preparation method of the polyaniline @ silver nanowire/polyimide porous gradient composite film comprises the following steps:
(1) preparation of the blend: adding 1g of sodium chloride and 0.2g of silver nanowires into a polyamic acid/dimethylformamide solution, and continuously stirring to uniformly disperse to form a blend; wherein the mass ratio of the sodium chloride to the polyamic acid to the silver nanowire is 0.7: 1: 0.65; (2) first spin coating: spin-coating the blend on a glass substrate to form a film, wherein the rotating speed is 700rmp/s, and the time is 70 s; (3) and (3) spin coating for the second time: spin-coating polyamic acid/dimethylformamide solution which is not doped with sodium chloride and silver nanowires on the membrane, wherein the rotating speed is 700rmp/s, and the time is 50 s; (4) and (3) curing: heating and curing, wherein the temperature is maintained at 100 ℃ for 10min, the temperature is maintained at 150 ℃ for 20min, the temperature is maintained at 180 ℃ for 15min, the temperature is maintained at 200 ℃ for 10min, and then the composite film is naturally cooled to room temperature to obtain a composite film; (5) removing the template: soaking the composite film in deionized water, maintaining stirring for 48h, taking out, and washing with the deionized water to obtain the silver nanowire/polyimide porous gradient composite film; (6) surface hydrophilic treatment: then, immersing the silver nanowire/polyimide porous gradient composite film into a sodium polystyrene sulfonate solution with the concentration of 0.1mol/L for treatment for 30min to obtain a silver nanowire/polyimide porous gradient composite film after hydrophilic treatment; (7) adding 1.5ml of aniline and HCl with the concentration of 0.1mol/L and the volume of 1ml into 100ml of deionized water, keeping the temperature at 4 ℃ and continuously stirring to obtain a dispersion liquid; placing the silver nanowire/polyimide porous gradient composite film subjected to hydrophilic treatment in the step (6) into the dispersion, and dropwise adding (NH) with the volume of 8ml and the concentration of 0.1g/ml4)2S2O8Aqueous solution, during which the temperature and the stirring speed are kept constant; after the dropwise addition is finished, the film is taken out after continuously stirring for 24 hours and is respectively removedAnd washing the polyaniline/silver nanowire/polyimide gradient composite film for multiple times by using ionized water and ethanol, and drying the washed polyaniline/silver nanowire/polyimide gradient composite film in vacuum at the temperature of 60 ℃.
Example 3
The preparation method of the polyaniline @ silver nanowire/polyimide porous gradient composite film comprises the following steps:
(1) preparation of the blend: adding 0.5g of sodium chloride and 0.1g of silver nanowires into the polyamic acid/dimethylformamide solution, and continuously stirring to uniformly disperse to form a blend; wherein the mass ratio of the sodium chloride to the silver nanowires to the polyamic acid is 1.1: 1: 0.8; (2) first spin coating: spin-coating the blend on a glass substrate to form a film, wherein the rotating speed is 700rmp/s, and the time is 70 s; (3) and (3) spin coating for the second time: spin-coating polyamic acid/dimethylformamide solution which is not doped with sodium chloride and silver nanowires on the membrane, wherein the rotating speed is 700rmp/s, and the time is 50 s; (4) and (3) curing: heating and curing, wherein the temperature is maintained at 100 ℃ for 10min, the temperature is maintained at 150 ℃ for 20min, the temperature is maintained at 180 ℃ for 15min, the temperature is maintained at 200 ℃ for 10min, and then the composite film is naturally cooled to room temperature to obtain a composite film; (5) removing the template: soaking the composite film in deionized water, maintaining stirring for 48h, taking out, and washing with the deionized water to obtain the silver nanowire/polyimide porous gradient composite film; (6) surface hydrophilic treatment: then, immersing the silver nanowire/polyimide porous gradient composite film into a sodium polystyrene sulfonate solution with the concentration of 0.01-0.1 mol/L for treatment for 30min to obtain a silver nanowire/polyimide porous gradient composite film after hydrophilic treatment; (7) adding 1ml of aniline and 0.1mol/L HCl with the volume of 0.8ml into 100ml of deionized water, keeping the temperature at 2 ℃ and continuously stirring to obtain a dispersion liquid; placing the silver nanowire/polyimide porous gradient composite film subjected to hydrophilic treatment in the step (6) into the dispersion, and dropwise adding (NH) with the volume of 6ml and the concentration of 0.1g/ml4)2S2O8Aqueous solution, during which the temperature and the stirring speed are kept constant; after the dropwise addition is finished, continuously stirring for 19h, taking out the film, washing the film for multiple times by deionized water and ethanol respectively, and drying the film in vacuum at the temperature of 60 ℃ to obtain the polyaniline @ silver nanowire/polyimideAmine gradient composite films.
The polyaniline @ silver nanowire/polyimide porous gradient composite films prepared according to examples 1-3 were measured for specific surface area and tensile strength at break, and the summary test results were as follows:
table 1 results of performance testing
| Specific surface area/(m)2/g) | Tensile strength at break/(MPa) | |
| Example 1 | 780.3 | 137.2 |
| Example 2 | 1005.7 | 125.6 |
| Example 3 | 1298.4 | 113.5 |
As can be seen from table 1, the polyaniline @ silver nanowire/polyimide porous gradient composite film obtained in examples 1 to 3 has a large specific surface area and a strong tensile strength at break, which indicates that the preparation method of the polyaniline @ silver nanowire/polyimide porous gradient composite film provided by the present invention is scientific and reasonable, and a composite film material having a large specific surface area and good mechanical properties can be obtained.
The embodiments described above are some, but not all embodiments of the invention. Those of ordinary skill in the art will also recognize various ways to alter the parameters of the embodiments disclosed in the application, all of which fall within the spirit and scope of the claims of the application.
Claims (5)
1. A preparation method of a polyaniline @ silver nanowire/polyimide porous gradient composite film is characterized by comprising the following operation steps:
(1) preparation of the blend: adding 0.1-1 g of sodium chloride and 0.05-0.2 g of silver nanowires into a polyamic acid/dimethyl formamide solution, and continuously stirring to uniformly disperse to form a blend;
(2) first spin coating: spin-coating the blend on a glass substrate to form a film, wherein the rotating speed is 700rmp/s, and the time is 70 s;
(3) and (3) spin coating for the second time: spin-coating polyamic acid/dimethylformamide solution which is not doped with sodium chloride and silver nanowires on the membrane, wherein the rotating speed is 700rmp/s, and the time is 50 s;
(4) and (3) curing: then, heating and curing are carried out, wherein,
maintaining at 100 deg.C for 10min, maintaining at 150 deg.C for 20min, maintaining at 180 deg.C for 15min, maintaining at 200 deg.C for 10min, and naturally cooling to room temperature to obtain composite film;
(5) removing the template: soaking the composite film in deionized water, maintaining stirring for 48h, taking out, and washing with the deionized water to obtain the silver nanowire/polyimide porous gradient composite film;
(6) surface hydrophilic treatment: then, immersing the silver nanowire/polyimide porous gradient composite film prepared in the step (5) into a sodium polystyrene sulfonate solution with the concentration of 0.01-0.1 mol/L for treatment for 30min to obtain a silver nanowire/polyimide porous gradient composite film subjected to hydrophilic treatment;
(7) adding 0.5-1.5 ml of aniline and 0.1mol/L HCl (HCl) in a volume of 0.5-1 ml into 100ml of deionized water, keeping the temperature at 0-4 ℃, and continuously stirring to obtain a dispersion liquid;
the silver nano treated by the hydrophilic treatment in the step (6) is treatedThe rice-flour noodle/polyimide porous gradient composite film is placed in the dispersion liquid, and then (NH) with the volume of 2-8 ml and the concentration of 0.1g/ml is added dropwise4)2S2O8Aqueous solution, during which the temperature and the stirring speed are kept constant;
after the dropwise addition is finished, continuously stirring for 12-24 h, taking out the film, washing the film for multiple times by deionized water and ethanol respectively, and drying the film in vacuum at the temperature of 60 ℃ to obtain the polyaniline @ silver nanowire/polyimide porous gradient composite film.
2. The preparation method of the polyaniline @ silver nanowire/polyimide porous gradient composite film as claimed in claim 1, wherein the preparation method comprises the following steps:
the viscosity of the polyamic acid/dimethyl formamide solution in the step (1) is 500-1500 cP; the mass ratio of the sodium chloride to the polyamic acid to the silver nanowire is 0.1-1.1: 1: 0.25-0.8; the viscosity of the formed blend is 1500-2500 cP.
3. The preparation method of the polyaniline @ silver nanowire/polyimide porous gradient composite film as claimed in claim 1, wherein the preparation method comprises the following steps:
the thickness of the film obtained by the first step of spin coating in the step (2) is 10-40 mu m; the thickness of the film obtained by the spin coating in the second step in the step (4) is 7-25 μm.
4. A polyaniline @ silver nanowire/polyimide porous gradient composite film is characterized in that: the polyaniline @ silver nanowire/polyimide porous gradient composite film is prepared by the preparation method of any one of claims 1-3.
5. The use of the polyaniline @ silver nanowire/polyimide porous gradient composite film as defined in claim 4 in a flexible gas sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073111.0A CN111234304B (en) | 2020-01-22 | 2020-01-22 | Polyaniline @ silver nanowire/polyimide porous gradient composite film, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073111.0A CN111234304B (en) | 2020-01-22 | 2020-01-22 | Polyaniline @ silver nanowire/polyimide porous gradient composite film, preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111234304A true CN111234304A (en) | 2020-06-05 |
| CN111234304B CN111234304B (en) | 2022-09-06 |
Family
ID=70861934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010073111.0A Active CN111234304B (en) | 2020-01-22 | 2020-01-22 | Polyaniline @ silver nanowire/polyimide porous gradient composite film, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111234304B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115368610A (en) * | 2022-09-13 | 2022-11-22 | 张艳霞 | Conductive polyimide film and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140299537A1 (en) * | 2011-12-08 | 2014-10-09 | Lg Chem. Ltd. | Reverse osmosis membrane including nano-silver wire layer and fabrication method thereof |
| CN104194033A (en) * | 2014-08-26 | 2014-12-10 | 桂林电器科学研究院有限公司 | Preparation method of porous polyimide film |
| CN109280190A (en) * | 2018-08-01 | 2019-01-29 | 乳源东阳光氟树脂有限公司 | A kind of polyimide porous film and preparation method thereof |
| CN109608879A (en) * | 2018-11-20 | 2019-04-12 | 郑州大学 | A kind of hollow ferroso-ferric oxide microballoon@polyaniline/polyimide composite film absorbing material and preparation method |
| CN109736092A (en) * | 2018-12-29 | 2019-05-10 | 东华大学 | A kind of polyimide-based porous organic nano composite cellulosic membrane of electrically conductive polyaniline cladding |
| CN110358136A (en) * | 2019-07-04 | 2019-10-22 | 武汉纺织大学 | A kind of composite foam film and preparation method thereof |
-
2020
- 2020-01-22 CN CN202010073111.0A patent/CN111234304B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140299537A1 (en) * | 2011-12-08 | 2014-10-09 | Lg Chem. Ltd. | Reverse osmosis membrane including nano-silver wire layer and fabrication method thereof |
| CN104194033A (en) * | 2014-08-26 | 2014-12-10 | 桂林电器科学研究院有限公司 | Preparation method of porous polyimide film |
| CN109280190A (en) * | 2018-08-01 | 2019-01-29 | 乳源东阳光氟树脂有限公司 | A kind of polyimide porous film and preparation method thereof |
| CN109608879A (en) * | 2018-11-20 | 2019-04-12 | 郑州大学 | A kind of hollow ferroso-ferric oxide microballoon@polyaniline/polyimide composite film absorbing material and preparation method |
| CN109736092A (en) * | 2018-12-29 | 2019-05-10 | 东华大学 | A kind of polyimide-based porous organic nano composite cellulosic membrane of electrically conductive polyaniline cladding |
| CN110358136A (en) * | 2019-07-04 | 2019-10-22 | 武汉纺织大学 | A kind of composite foam film and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 陈显平: "《分子模拟技术在微纳米传感器研究中的应用》", 31 March 2015 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115368610A (en) * | 2022-09-13 | 2022-11-22 | 张艳霞 | Conductive polyimide film and preparation method thereof |
| CN115368610B (en) * | 2022-09-13 | 2023-09-15 | 乌海瑞森新能源材料有限公司 | Conductive polyimide film and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111234304B (en) | 2022-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106188630B (en) | A kind of preparation method and applications based on cellulose sponge conducing composite material | |
| CN109520410B (en) | Three-dimensional graphene foam flexible strain sensor and preparation method thereof | |
| CN102866181B (en) | Polyaniline/ titanium dioxide nanometer composite impedance type thin film gas sensor and preparation method thereof | |
| Zou et al. | Superhydrophobization of cotton fabric with multiwalled carbon nanotubes for durable electromagnetic interference shielding | |
| CN109115266A (en) | A kind of wearable multifunction flexible sensor and preparation method thereof | |
| US20120251824A1 (en) | Stretchable Conductive Nanofibers, Stretchable Fiber Electrode Using The Same And Method For Producing The Same | |
| US11193845B2 (en) | Ultrahigh sensitive pressure-sensing film based on spiky hollow carbon spheres and the fabrication method thereof | |
| CN109295707A (en) | A kind of flexible thermal conducting nanofiber film and its preparation and application | |
| CN107313249A (en) | A kind of polyimides/nickel composite conductive fiber and preparation method thereof | |
| CN112680967B (en) | Piezoresistive sensing fabric with unidirectional moisture-conducting function and preparation method thereof | |
| CN111234304B (en) | Polyaniline @ silver nanowire/polyimide porous gradient composite film, preparation method and application | |
| CN110108759A (en) | It is a kind of based on polyaniline/metal oxide semiconductor nano compound film breathing ammonia gas sensor and preparation method thereof | |
| CN111458382A (en) | Room-temperature flexible graphene oxide ordered porous film sensor and preparation method and application thereof | |
| CN111627613B (en) | Preparation method of silver nanowire flexible transparent conductive film based on phenoxy resin | |
| CN109975365A (en) | A kind of wearable liquid sensor and preparation method thereof | |
| CN113418645B (en) | Composite flexible three-dimensional force sensor based on ferromagnetic nanowire/carbon material and preparation method thereof | |
| CN112556899B (en) | Flexible pressure sensor and preparation method thereof | |
| CN108530657B (en) | High-sensitivity strain sensing polymer with self-healing and super-hydrophobic waterproof properties and preparation method thereof | |
| CN111180112A (en) | Metal nanowire flexible conductive film and preparation method thereof | |
| CN113322669A (en) | Coaxial three-layer PET/CB/TPU composite fiber strain sensor and manufacturing method thereof | |
| CN106643460B (en) | A kind of graphene-based strain sensing film and its preparation method and application | |
| CN116478398B (en) | Pani@rgo@sio2Preparation method of gas-sensitive material, gas-sensitive material and ammonia sensor | |
| CN112679772A (en) | Flexible conductive composite material for intelligent wearing and preparation method | |
| CN110863345B (en) | Conductive composite fiber bundle, preparation method thereof and organic electrochemical transistor | |
| CN113214512A (en) | Film capable of stretching, strong in adhesiveness and capable of monitoring humidity change and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |