CN114054320A - Gas-responsive reversible fold pattern and preparation method thereof - Google Patents
Gas-responsive reversible fold pattern and preparation method thereof Download PDFInfo
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- 230000002441 reversible effect Effects 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229920000767 polyaniline Polymers 0.000 claims abstract description 89
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 48
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 48
- 230000037303 wrinkles Effects 0.000 claims abstract description 34
- 239000012528 membrane Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 14
- -1 polydimethylsiloxane Polymers 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 41
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 34
- 239000000758 substrate Substances 0.000 claims description 19
- 229920001971 elastomer Polymers 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 14
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 13
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 13
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims description 12
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 6
- 239000003431 cross linking reagent Substances 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000000178 monomer Substances 0.000 claims description 6
- 229910000069 nitrogen hydride Inorganic materials 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000004528 spin coating Methods 0.000 claims description 3
- 238000007605 air drying Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims 10
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims 9
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims 9
- 239000000203 mixture Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 230000004043 responsiveness Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 230000008961 swelling Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 31
- 239000011259 mixed solution Substances 0.000 description 11
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000008034 disappearance Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 230000000638 stimulation Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009832 plasma treatment Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 208000018999 crinkle Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
- B05D5/061—Special surface effect
- B05D5/062—Wrinkled, cracked or ancient-looking effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0433—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being a reactive gas
- B05D3/0453—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2201/00—Polymeric substrate or laminate
- B05D2201/02—Polymeric substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2518/00—Other type of polymers
Abstract
The invention relates to a gas-responsive reversible wrinkle pattern and a preparation method thereof, wherein the doping or dedoping state and the swelling state of a PANI film on the surface of PDMS (polydimethylsiloxane) are regulated and controlled by utilizing the acidity and alkalinity of gas, so that the surface pattern of the PANI film is regulated and controlled. Placing the PANI/PDMS membrane-based system in acid gas HCl, and enabling surface wrinkles to appear; putting the PANI/PDMS membrane base system into alkaline gas NH3In (3), the surface wrinkles disappear. By converting different gas environments, the dynamic reversible regulation and control of the PANI membrane surface folds are realized. The invention realizes the accurate control of the wrinkle size by using a simple operation method, realizes the reversible regulation of the wrinkle pattern by using a gas responsiveness means, enriches the preparation and regulation means of the dynamic surface pattern, and enriches the regulation and control means of the dynamic surface patternAnd provides a new idea for the construction of the smart meter interface.
Description
Technical Field
The invention relates to a gas-responsive reversible fold pattern and a preparation method thereof, belonging to the technical field of surface pattern preparation and regulation.
Background
The novel patterning technology of surface wrinkling is utilized to prepare the wrinkled microstructure, and the wrinkled microstructure can be widely applied to the fields of flexible electronic devices, anti-counterfeiting, optical devices, biological medicines and the like. The ability to dynamically adjust the appearance and disappearance of the wrinkled structure places special demands on specific application areas (e.g., surface wettability, optics, smart displays, information storage, etc.). How to simply and effectively construct a stimulation-responsive intelligent wrinkling/wrinkle-removing film/base system is the hot spot of current research.
Currently, dynamic wrinkle systems have been developed that respond to external stimuli such as light, heat, and redox environments. The development of smart surfaces with gas-responsive reversible wrinkle patterns has been rarely reported. The development of an intelligent surface with stimulation responsiveness to gas has potential application prospects in the fields of environmental monitoring and the like.
Disclosure of Invention
The invention aims at the problems and provides a gas-responsive reversible wrinkle pattern and a preparation method thereof. The method comprises the steps of selecting Polydimethylsiloxane (PDMS) as a substrate, constructing a Polyaniline (PANI) film on the PDMS substrate by a spin coating technology, and then alternately introducing hydrogen chloride (HCl) gas and ammonia (NH)3) The mode realizes the reversible and intelligent regulation and control of the wrinkling or wrinkle removal of the PANI membrane.
Further, the invention discloses a preparation method of a gas-responsive reversible wrinkle pattern, which comprises the following specific steps:
(1) heating and curing the PDMS prepolymer and a cross-linking agent to prepare a PDMS rubber elastic substrate;
(2) preparing PANI through oxidative polymerization, washing, filtering and drying the PANI to obtain dedoped PANI powder, and dissolving the PANI powder in N-methyl pyrrolidone to prepare PANI solution;
(3) dropwise adding the PANI solution on a PDMS rubber elastic substrate, and uniformly forming a PANI film on PDMS by a rotary coating technology to prepare a PANI/PDMS film-based system;
(4) placing the PANI/PDMS membrane base system in a closed container, and introducing HCl gas to obtain a PANI corrugated membrane; then NH is introduced3Gas is carried out to obtain the PANI flat film with the wrinkle pattern disappeared; sequentially and alternately introducing HCl and NH3Gas, resulting in a reversible pleated or de-pleated dynamically patterned PANI film.
Further, in the step (1), the mass ratio of the PDMS prepolymer to the cross-linking agent is 10-40: 1, fully stirring and mixing the mixed solution in a container by using a glass rod, and then putting the mixed solution in a vacuum drier to thoroughly remove bubbles generated by stirring; further, the mixed solution was heated in a constant temperature forced air drying oven at 70 ℃ for 4 hours to prepare a PDMS rubber elastomer substrate.
Further, the method for preparing PANI by oxidative polymerization in the step (2) comprises the steps of respectively preparing a solution A containing an aniline monomer and a solution B containing ammonium persulfate in a hydrochloric acid solution, mixing the solution A and the solution B, and reacting at a constant temperature of 4 ℃ for 1 hour to obtain the PANI; preferably, the concentration of the hydrochloric acid solution is 1M, the concentration of the aniline monomer in the solution A is 0.2M, and the concentration of the ammonium persulfate in the solution B is 0.2M. Further, the PANI solution prepared by oxidative polymerization was repeatedly washed with ammonia water until the solution became dark purple, and then filtered and dried to obtain dedoped PANI powder.
The invention also includes the gas-responsive reversible wrinkle pattern obtained by the above preparation method.
Compared with the prior art, the invention has the following advantages:
the invention firstly provides the utilization of acid gas HCl and alkaline gas NH3And (3) dynamically regulating and controlling the wrinkles. The method has simple and convenient operability and good repeatability, and can realize quick and reversible regulation and control of the surface wrinkle pattern on the gas. In addition, the fold structure size of the patterned PANI film prepared by the invention can be accurately controlled by adjusting the modulus of the PDMS substrate and the thickness of the PANI film layer, so that the patterned PANI film is suitable for different application fields. The PANI film constructed by the invention crinkles when meeting HCl gas and NH3The gas wrinkle eliminating characteristic makes it possible to be used as gas sensor. The surface microstructure can influence the wettability, and the dynamic fold structure developed by the system is expected to play a role in the field of gas controllable wettability. The method for regulating and controlling the surface pattern by the gas responsiveness means can be expanded to other gas combinations and film substrate systems, and provides a new idea for constructing a stimulus responsiveness intelligent surface interface.
Drawings
FIG. 1 is an optical microscope photograph of the PANI film before the HCl gas is introduced (or after NH3 gas is introduced) in the PANI/PDMS film-based system of example 1;
FIG. 2 is an optical microscope photograph of the large-scale wrinkle pattern of the PANI film after the PANI/PDMS film-based system of example 1 is passed through HCl gas;
FIG. 3 shows the PANI/PDMS membrane-based system of example 2 before introducing HCl gas (or NH)3Post-gas) optical microscope pictures of PANI films;
fig. 4 is an optical microscope photograph of the pattern of small-sized folds of the PANI film after passing HCl gas through the PANI/PDMS film-based system of example 2.
Detailed Description
The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. The examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Example 1: construction of PANI/PDMS membrane base system and formation and regulation of large-size fold pattern of PANI membrane
The method comprises the following steps:
(1) weighing the mass ratio of the PDMS prepolymer to the cross-linking agent as 40: 1, fully stirring and mixing the mixed solution in a container by using a glass rod, and then putting the mixed solution in a vacuum drier to thoroughly remove bubbles generated by stirring;
(2) pouring the mixed solution into a plastic 1 culture dish of 10c x 10cm, and putting the mixed solution into a constant-temperature air-blast drying oven to heat for 4 hours at 70 ℃ to obtain a PDMS rubber elastomer substrate;
(3) cutting a PDMS rubber elastomer substrate in a plastic culture dish into a sample of 3cm multiplied by 3cm, and carrying out oxygen plasma treatment on the sample in a plasma cleaning instrument for 30 seconds for later use;
(4) respectively preparing a solution A containing 0.2M aniline monomer and a solution B containing 0.2M ammonium persulfate in a 1M hydrochloric acid solution, mixing A, B solutions, and reacting at constant temperature of 4 ℃ for 1 hour;
(5) repeatedly washing the mixed reaction solution obtained in the step (4) by using 2M ammonia water until the solution becomes dark purple, and then filtering and drying to obtain dedoped PANI powder;
(6) weighing 1g of PANI powder, adding the PANI powder into 10ml of N-methyl pyrrolidone solvent, magnetically stirring to dissolve the PANI powder for 24 hours, and filtering to obtain filtrate which is a saturated PANI solution for later use;
(7) placing the PDMS substrate treated by the oxygen plasma in the step (3) on a sample platform of a rotary coating instrument, dropwise adding 50 mu l of saturated PANI solution on the surface of PDMS by using a liquid-transferring gun, rotating at 1500r rotating speed for 60 seconds to obtain a PANI/PDMS membrane-based system sample, and drying at room temperature in air for later use, wherein the surface of the PANI membrane is flat as shown in figure 1;
(8) putting the PANI/PDMS sample into a closed container, dropwise adding 0.5ml of concentrated hydrochloric acid into the container, and allowing HCl gas to volatilize to the PANI membrane to form a micron-scale wrinkle pattern, wherein the wrinkle size is about 10 μm, as shown in FIG. 2;
(9) removing concentrated hydrochloric acid in the container in the step (8), and dropwise adding 0.5ml of concentrated ammonia water until NH is finished3When the gas is volatilized to the PANI film, the original wrinkle pattern disappears, and the PANI film becomes flat again, as shown in fig. 1;
(10) and (4) repeating the operation of the step (8) and the operation of the step (9) to realize the dynamic appearance and disappearance of the PANI membrane wrinkle pattern, namely obtaining the gas response reversible wrinkle pattern with larger size.
Example 2: construction of PANI/PDMS membrane base system and formation and regulation of small-size fold pattern of PANI membrane
The method comprises the following steps:
(1) weighing the mass ratio of the PDMS prepolymer to the cross-linking agent as 10: 1, fully stirring and mixing the mixed solution in a container by using a glass rod, and then putting the mixed solution in a vacuum drier to thoroughly remove bubbles generated by stirring;
(2) pouring the mixed solution into a plastic 1 culture dish of 10c x 10cm, and putting the mixed solution into a constant-temperature air-blast drying oven to heat for 4 hours at 70 ℃ to obtain a PDMS rubber elastomer substrate;
(3) cutting the PDMS elastomer in the plastic culture dish into a sample of 3cm multiplied by 3cm, and carrying out oxygen plasma treatment on the sample in a plasma cleaning instrument for 30 seconds for later use;
(4) respectively preparing a solution A containing 0.2M aniline monomer and a solution B containing 0.2M ammonium persulfate in a 1M hydrochloric acid solution, mixing A, B solutions, and reacting at constant temperature of 4 ℃ for 1 hour;
(5) repeatedly washing the mixed reaction solution by using 2M ammonia water until the solution becomes dark purple, and then filtering and drying to obtain dedoped PANI powder;
(6) weighing 1g of PANI powder, adding the PANI powder into 10ml of N-methylpyrrolidone solvent, magnetically stirring to dissolve the PANI powder for 24 hours, filtering the solution to leave a filtrate as a saturated PANI solution, and adding N-methylpyrrolidone into the filtrate to dilute the PANI solution to one half of the original solution for later use;
(7) placing the PDMS substrate treated by the oxygen plasma in the step (3) on a sample platform of a rotary coating instrument, dropwise adding 50 μ l of the PANI solution obtained in the step (6) on the surface of PDMS by using a liquid-transferring gun, rotating at 3000r for 60 seconds to obtain a PANI/PDMS membrane-based system sample, and drying at room temperature in air for later use, wherein the surface of the PANI membrane is flat as shown in FIG. 3;
(8) putting the PANI/PDMS sample into a closed container, dropwise adding 0.5ml of concentrated hydrochloric acid into the container, and allowing HCl gas to volatilize to the PANI membrane to form a micron-scale wrinkle pattern, wherein the wrinkle size is about 2 μm, as shown in FIG. 4;
(9) removing the concentrated hydrochloric acid in the container in the step (8), dropwise adding 0.5ml of concentrated ammonia water, and when the NH3 gas is volatilized to the PANI membrane, the original wrinkle pattern disappears, and the PANI membrane becomes flat again, as shown in FIG. 3;
(10) and (4) repeating the operation of the step (8) and the operation of the step (9) to realize the dynamic appearance and disappearance of the PANI membrane wrinkle pattern, so that the gas response reversible wrinkle pattern with small size can be obtained.
In conclusion, the method mainly utilizes the spin coating technology to prepare the PANI membranes with different thicknesses on the PDMS substrates with different moduli, so that a PANI/PDMS membrane substrate system is constructed, and two different gases are utilized to realize reversible regulation and control of appearance and disappearance of the PANI membrane surface wrinkles. Different gas acid-base causes different doping/de-doping states of PANI, so that the PANI film is in different swelling and shrinking states, and reversible change of pattern wrinkling/wrinkle removal is realized. The size of the wrinkle structure prepared by the method can be accurately regulated, the operation mode is simple, and the wrinkle pattern can be quickly, effectively and reversibly regulated and controlled based on the novel means of gas stimulation responsiveness.
Claims (8)
1. A preparation method of a gas-responsive reversible wrinkle pattern is characterized by comprising the following steps: the method is characterized in that polydimethylsiloxane is used as a substrate, a polyaniline film is constructed on a PDMS substrate through a spin coating technology, and then wrinkling or wrinkle removal of the PANI film is realized in a mode of alternately introducing hydrogen chloride gas and ammonia gas.
2. The preparation method according to claim 1, comprising the following specific steps:
(1) heating and curing the PDMS prepolymer and a cross-linking agent to prepare a PDMS rubber elastic substrate;
(2) preparing PANI through oxidative polymerization, washing, filtering and drying the PANI to obtain dedoped PANI powder, and dissolving the PANI powder in N-methyl pyrrolidone to prepare PANI solution;
(3) dropwise adding the PANI solution on a PDMS rubber elastic substrate, and uniformly forming a PANI film on PDMS by a rotary coating technology to prepare a PANI/PDMS film-based system;
(4) placing the PANI/PDMS membrane base system in a closed container, and introducing HCl gas to obtain a PANI corrugated membrane; then NH is introduced3Gas is carried out to obtain the PANI flat film with the wrinkle pattern disappeared; sequentially and alternately introducing HCl and NH3Gas, resulting in a reversible pleated or de-pleated dynamically patterned PANI film.
3. The preparation method of claim 2, wherein the mass ratio of the PDMS prepolymer to the cross-linking agent weighed in the step (1) is 10-40: 1, fully stirring and mixing the mixture in a container by using a glass rod, and then putting the container in a vacuum drier to thoroughly remove bubbles generated by stirring.
4. The method according to claim 3, wherein the mixture is heated in a constant temperature forced air drying oven at 70 ℃ for 4 hours in step (1) to prepare the PDMS rubber elastomer substrate.
5. The preparation method according to claim 2, wherein the method for preparing PANI by oxidative polymerization in step (2) comprises preparing a solution a containing an aniline monomer and a solution B containing ammonium persulfate in a hydrochloric acid solution, mixing the solution a and the solution B, and reacting at a constant temperature of 4 ℃ for 1 hour.
6. The method according to claim 5, wherein the hydrochloric acid solution in the step (2) has a concentration of 1M, the aniline monomer in the solution A has a concentration of 0.2M, and the ammonium persulfate in the solution B has a concentration of 0.2M.
7. The method of claim 2, wherein the PANI solution prepared by oxidative polymerization in the step (2) is repeatedly washed with aqueous ammonia until the solution becomes dark purple, and then filtered and dried to obtain dedoped PANI powder.
8. A gas-responsive reversible wrinkle pattern obtained by the production method as set forth in any one of claims 1 to 7.
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| 谢继勋: "《皱纹化聚苯胺膜的制备、调控及其性能研究》", 《博士电子期刊》 * |
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