WO2020206646A1 - 一种基于银粉和pdms的柔性导电薄膜及其制备方法 - Google Patents
一种基于银粉和pdms的柔性导电薄膜及其制备方法 Download PDFInfo
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- WO2020206646A1 WO2020206646A1 PCT/CN2019/082154 CN2019082154W WO2020206646A1 WO 2020206646 A1 WO2020206646 A1 WO 2020206646A1 CN 2019082154 W CN2019082154 W CN 2019082154W WO 2020206646 A1 WO2020206646 A1 WO 2020206646A1
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- silver powder
- pdms
- flexible conductive
- conductive film
- film
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000002360 preparation method Methods 0.000 title abstract description 28
- 239000010409 thin film Substances 0.000 title abstract 9
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 110
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 110
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000000227 grinding Methods 0.000 claims abstract description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims abstract 27
- 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 abstract 27
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims abstract 27
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 34
- 239000000203 mixture Substances 0.000 claims description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 16
- 229910052710 silicon Inorganic materials 0.000 claims description 16
- 239000010703 silicon Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 238000004528 spin coating Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 description 16
- 238000002474 experimental method Methods 0.000 description 6
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 5
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000001755 magnetron sputter deposition Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 2
- 239000012965 benzophenone Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- -1 polydimethylsiloxane Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 1
- 206010067484 Adverse reaction Diseases 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 229920002223 polystyrene Polymers 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/288—Deposition of conductive or insulating materials for electrodes conducting electric current from a liquid, e.g. electrolytic deposition
Definitions
- the invention belongs to the technical field of flexible conductive films, and in particular relates to a flexible conductive film based on silver powder and PDMS and a preparation method thereof.
- the current preparation methods of stretchable flexible conductive films based on silver powder and PDMS mainly include the following:
- the PDMS prepolymer and curing agent were mixed, and then the prepared core-shell PS@Ag filler was added, and mixed at a speed of 2000 rpm for 5 minutes. Then the mixture is degassed under vacuum for 10 minutes, and then the viscous mixture is poured into a mold and scraped to prepare a conductive film, or directly printed on the substrate by manual screen printing to obtain various conductive patterns, and then 80 Heat at °C for 4 hours to cure.
- the unexposed areas are fully crosslinked, while the exposed areas remain uncured.
- the uncured PDMS was placed in toluene for 5 seconds to remove. Rinse with 2-propanol after development and blow dry with nitrogen flow.
- the pattern prepared on the flexible substrate is laminated or oxygen plasma bonded to form a multilayer device. Finally, a thermal compression step is used to mold the micromachined device into the desired shape for biomedical applications.
- the surface of the pre-strained PDMS substrate was then exposed to ultraviolet light ozone (UVO) for 30 minutes.
- UVO ultraviolet light ozone
- the pre-strained PDMS substrate was released at a rate of 1 mm/sec to form a wavy pattern on the PDMS substrate.
- the PDMS substrate was fixed on the substrate holder with a constant pre-strain of 20%, and the UV-ozone treatment time was increased by 40 to 60 minutes.
- Direct current reactive magnetron sputtering DC sputtering
- a DC sputtering system was used to deposit translucent Ag films of various thicknesses (10, 15, 20 nm) on the wavy pattern and flat PDMS substrate.
- the PDMS substrate was constantly rotated at a speed of 20 rpm at room temperature.
- the translucent Ag film was grown under a constant DC reaction power of 100W, a working pressure of 2 mtorr, and an argon (Ar) flow rate of 20 sccm (standard milliliters/minute).
- the preparation process is complicated, and complicated pretreatment is required for the conductive material-silver powder to modify the surface of the silver powder;
- the preparation process involves chemical reagents harmful to the human body such as styrene, divinylbenzene, azobisisobutyronitrile and benzophenone;
- the flexible conductive film prepared by the above scheme is weak in conductivity and stretchability.
- the present invention aims to solve at least one of the above technical problems. It provides a flexible conductive film based on silver powder and PDMS and a preparation method thereof.
- the preparation process is simple, does not involve harmful chemical reagents, and has low requirements on equipment. The stretchability is better.
- the technical solution of the present invention is: a method for preparing a flexible conductive film based on silver powder and PDMS, including the following steps: preparing silver powder, PDMS prepolymer and PDMS curing agent, and the diameter of the silver powder is less than 12 microns;
- the liquid flexible conductive film is evenly coated to a set thickness and cured to obtain a flexible conductive film.
- the cleaning step includes:
- the ethanol above the silver powder is sucked and the remaining ethanol is evaporated.
- the diameter of the silver powder is 2 micrometers to 3.5 micrometers.
- the weight ratio of the silver powder to the PDMS film substrate is between 150 wt.% and 200 wt.%.
- the weight ratio between the PDMS prepolymer and the PDMS curing agent is 10:1.
- the curing of the liquid flexible conductive film includes the following steps:
- the liquid flexible conductive film obtained by mixing is poured on a silicon wafer, and then spin-coated on a homogenizer to form a film to be cured.
- the spin coating speed of the homogenizer is 400-1000 rpm, and the spin coating time is 15- 25s;
- the film to be cured on the heating plate together with the silicon wafer, and heat for 15-30 minutes in an environment of 60-100°C.
- the film to be cured forms a cured flexible conductive film.
- the flexible conductive film is peeled from the silicon wafer.
- the embodiment of the present invention also provides a flexible conductive film based on silver powder and PDMS, including silver powder and a PDMS film substrate, the silver powder is evenly dispersed in the PDMS film substrate, and the diameter of the silver powder is less than 12 microns.
- the diameter of the silver powder is 2 micrometers to 3.5 micrometers.
- the weight ratio of the silver powder to the PDMS film substrate is between 150 wt.% and 200 wt.%.
- the present invention provides a flexible conductive film based on silver powder and PDMS.
- the flexible conductive film can change its shape arbitrarily, such as stretching, bending, and twisting, which can be used in conjunction with any curved surface.
- the PDMS film matrix also has biological characteristics. It has the characteristics of compatibility and non-toxicity, and has good adherence to the skin, can be widely used in wearable devices, and has high sensitivity and good use effect.
- the preparation process is simpler and faster, and does not require any dangerous chemical reagents such as strong acids and alkalis and high-precision, high-tech equipment during the preparation process.
- experiments have also verified that the sensitivity coefficient of the flexible conductive film prepared by the present invention can reach 939, which is much higher than the current similar products.
- FIG. 1 is a schematic diagram of a reference flow chart of a method for preparing a flexible conductive film based on silver powder and PDMS provided by an embodiment of the present invention
- FIG. 2 is the GF value at each stage in the stretching process of a flexible conductive film based on silver powder and PDMS provided by an embodiment of the present invention.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- the embodiment of the present invention provides a method for preparing a flexible conductive film based on silver powder and PDMS, which includes the following steps: preparing silver powder, PDMS (polydimethylsiloxane) prepolymer and PDMS curing agent, and The diameter of silver powder is less than 12 microns to ensure sensitivity;
- the silver powder is ground, cleaned, and dried, it is added to the PDMS prepolymer and mixed, and then the PDMS curing agent is added and mixed to obtain a liquid flexible conductive film, that is, the PDMS is mixed evenly by mixing twice The effect is better, the distribution of silver powder is more uniform, and the sensing accuracy of the prepared flexible conductive film is higher;
- the liquid flexible conductive film is evenly coated to a set thickness and cured to obtain a flexible conductive film.
- the preparation method is simple and rapid. The preparation process does not require any dangerous chemical reagents such as strong acids or alkalis and high-precision, high-tech equipment. The preparation cost is low and the finished product effect is good.
- the cleaning step includes:
- the ethanol above the silver powder is sucked and the remaining ethanol is evaporated.
- the diameter of the silver powder is 1.5 ⁇ m to 5 ⁇ m, and in this embodiment, the diameter of the silver powder is 2 ⁇ m to 3.5 ⁇ m.
- the weight ratio of the silver powder to the PDMS film substrate is between 150 wt.% and 200 wt.%.
- the weight ratio between the PDMS prepolymer and the PDMS curing agent is 10:1.
- the curing of the liquid flexible conductive film includes the following steps:
- the liquid flexible conductive film obtained by mixing is poured on a silicon wafer, and then spin-coated on a homogenizer to form a film to be cured.
- the spin coating speed of the homogenizer is 400-1000 rpm, and the spin coating time is 15- 25s; Release agent can be sprayed on the silicon wafer in advance.
- the film to be cured on the heating plate together with the silicon wafer, and heat for 15-30 minutes in an environment of 60-100°C.
- the film to be cured forms a cured flexible conductive film.
- the flexible conductive film is peeled from the silicon wafer.
- the Ag/PDMS film is made of highly flexible PDMS as a base material, mixed with silver powder with relatively uniform particles, and cured by ultrasound, stirring, spin coating and heating And so on. By controlling the weight ratio of the silver powder to the PDMS substrate and the spin coating speed and time, flexible conductive films with different characteristics can be obtained.
- the flexible conductive film method of PDMS does not require any dangerous chemical reagents such as strong acids and alkalis and high-precision, high-tech equipment in the preparation process.
- the flexible conductive film controls the conductivity and thickness of the film by controlling the weight ratio of silver powder and PDMS and the spin coating speed and time.
- the prepared film can meet the needs of different applications.
- the flexible conductive film has a larger weight ratio and spin coating speed. It can be applied to flexible sensors with lower sensitivity but larger measuring range. On the contrary, a flexible conductive film with a smaller weight ratio and spin coating speed can be used for flexible sensors that require high sensitivity but a small measurement range
- the thickness of the film can be controlled by controlling the spin coating speed and time.
- the spin coating speed is 400-1000 rpm, and the spin coating time is 15-25 s.
- the flexible conductive film can be stretched experiment, that is, by measuring the initial resistance value and initial size of the flexible conductive film, and measuring the stretched size and the resistance value of the corresponding size.
- wires can be connected to both ends of the flexible conductive film, and the wires can be connected to a resistance measuring device (such as an SMU source meter). Clamp the two ends of the flexible conductive film by the clamp of the stretching device, and start to stretch the flexible conductive film step by step through the stretching device, and record the resistance value under the corresponding stretch size until the flexible conductive film breaks and fails.
- 2 is the GF value of the flexible conductive film at each stage in the stretching process, and the overall GF value is 939.
- the embodiment of the present invention proves that the flexible conductive film has good conductivity and stretchability through stretching experiments on the above-mentioned flexible conductive film, the maximum stretch rate is 48%, and the maximum sensitivity (GF) can reach 939.
- GF gauge factor
- R 0 and R represent the initial resistance of the flexible conductive film and the resistance value after stretching, respectively;
- L 0 and L represent the initial length and the length of the flexible conductive film after being stretched, respectively.
- the embodiment of the present invention provides a flexible conductive film based on silver powder and PDMS and a preparation method thereof.
- the preparation process is simpler and faster, and does not require any dangerous chemical reagents such as strong acids and alkalis, high precision and high technology in the preparation process. device of.
- experiments have also verified that the sensitivity coefficient of the silver powder/PDMS film (flexible conductive film) prepared by the present invention can reach 939, which is much higher than the current similar products.
- the embodiment of the present invention provides a flexible conductive film based on silver powder and PDMS, which can be prepared by the preparation method of the first embodiment and can be used for sensors of wearable devices, including silver powder and PDMS film substrate (PDMS film substrate), PDMS is polydimethylsiloxane, It is odorless, highly transparent, has high stretchability, heat resistance, cold resistance, and the viscosity changes little with temperature.
- the silver powder is uniformly dispersed in the PDMS film matrix, the diameter of the silver powder can be less than 12 microns, the conductive effect of the silver powder is good, and the micron-level particle size can ensure the sensitivity of the flexible conductive film, because the silver powder is uniformly dispersed in the In the PDMS film matrix, and the PDMS film matrix can be deformed at will, when the flexible conductive film is deformed by an external force, the local spacing and local density of the silver powder will change at the deformed place, which will cause the resistance of the flexible conductive film to change, thereby causing the flow
- the current passing through the flexible conductive film or/and the voltage change applied to the flexible conductive film has high sensitivity (super sensitivity).
- the diameter of the silver powder may be less than 10 microns, for example, the diameter of the silver powder may be 1 to 6 microns to ensure its sensitivity.
- the diameter of the silver powder may be 1-4.5 micrometers, preferably, the diameter of the silver powder may be 2 micrometers-3.5 micrometers.
- the weight ratio of the silver powder to the PDMS film substrate may be between 100 wt.% and 300 wt.%.
- the weight ratio of the silver powder to the PDMS film substrate is between 150 wt.% and 200 wt.%.
- the weight ratio is lower than 150wt.%, the conductivity of the film is relatively poor; when the weight ratio is higher than 200wt.%, the mixture of silver powder and PDMS is relatively viscous, which is not easy for subsequent uniform spin coating, and the forming performance is poor.
- conductive electrodes can be inserted or pasted or clamped on both sides of the PDMS film substrate.
- the conductive electrode can be connected to a resistance measuring device.
- a flexible protective layer can be provided on the surface of the PDMS film substrate.
- the flexible protective layer can be a wear-resistant, tear-resistant, and corrosion-resistant protective layer, such as a silicone protective layer.
- the PDMS film substrate can be polygonal (rectangular, triangular), circular, cylindrical, cylindrical, etc.
- the embodiment of the present invention proves that the flexible conductive film has good conductivity and stretchability through stretching experiments on the above-mentioned flexible conductive film, the maximum stretch rate is 48%, and the maximum sensitivity (GF) can reach 939.
- GF gauge factor
- GF strain sensitivity factor
- GF [(R- R 0 )/ R 0 ]/[(L- L 0 )/ L 0 ]
- R 0 and R represent the initial resistance of the flexible conductive film and the resistance value after stretching, respectively;
- L 0 and L represent the initial length and the length of the flexible conductive film after being stretched, respectively.
- the embodiment of the present invention provides a flexible conductive film based on silver powder and PDMS and a preparation method thereof.
- the preparation process is simpler and faster, and does not require any dangerous chemical reagents such as strong acids and alkalis, high precision and high technology in the preparation process. device of.
- experiments have also verified that the sensitivity coefficient of the silver powder/PDMS film (flexible conductive film) prepared by the present invention can reach 939, which is much higher than the current similar products.
- the thickness of the above-mentioned flexible conductive film may be 0.05 to 5 mm or other suitable thickness.
- the thickness of the aforementioned flexible conductive film is 0.1 to 2 mm.
- the embodiment of the present invention provides a flexible conductive film based on silver powder and PDMS.
- the flexible conductive film can change its shape arbitrarily, such as stretching, bending, and twisting, which can be used in conjunction with any curved surface.
- the PDMS film matrix is also It has the characteristics of biocompatibility and non-toxicity, and has good adherence to the skin, can be widely used in wearable devices, and has high sensitivity and good use effect.
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Abstract
Description
Claims (9)
- 一种基于银粉和PDMS的柔性导电薄膜的制备方法,其特征在于,制备银粉、PDMS预聚物和PDMS固化剂,且所述银粉的直径小于12微米;将所述银粉进行研磨、清洗、干燥后,加入所述PDMS预聚物中混匀再加入所述PDMS固化剂混匀得到液态柔性导电薄膜;将所述液态柔性导电薄膜涂匀至设定厚度并固化后得到柔性导电薄膜。
- 如权利要求1所述的一种基于银粉和PDMS的柔性导电薄膜的制备方法,其特征在于,其中,清洗步骤包括:并向具有银粉的容器中加入5至10克乙醇,然后通过超声波装置将银粉和乙醇的混合溶液超声分散;待所述银粉沉淀在容器的底部后,吸除银粉上方的乙醇并将剩余乙醇蒸发。
- 如权利要求1所述的一种基于银粉和PDMS的柔性导电薄膜的制备方法,其特征在于,所述银粉的直径为2微米-3.5微米。
- 如权利要求1所述的一种基于银粉和PDMS的柔性导电薄膜的制备方法,其特征在于,所述银粉与所述PDMS薄膜基体的重量比在150wt.%-200wt.%之间。
- 如权利要求1所述的一种基于银粉和PDMS的柔性导电薄膜的制备方法,其特征在于,所述PDMS预聚物和PDMS固化剂之间的重量比为10:1。
- 如权利要求1至5中任一茂所述的一种基于银粉和PDMS的柔性导电薄膜的制备方法,其特征在于,所述液态柔性导电薄膜的固化包括以下步骤:将混匀得到的所述液态柔性导电薄膜倒在硅片上,然后在匀胶机上进行旋涂形成待固化薄膜,所述匀胶机的旋涂速度为400-1000rpm,旋涂时间为15-25s;将所述待固化薄膜与硅片一起放于加热板上,在60-100℃的环境下加热15-30分钟,所述待固化薄膜形成固化的柔性导电薄膜,待所述硅片及柔性导电薄膜冷却之后,将所述柔性导电薄膜自所述硅片上剥离。
- 一种基于银粉和PDMS的柔性导电薄膜,其特征在于,包括银粉和PDMS薄膜基体,所述银粉均匀分散于所述PDMS薄膜基体内,所述银粉的直径小于12微米。
- 如权利要求7所述的一种基于银粉和PDMS的柔性导电薄膜,其特征在于,所述银粉的直径为2微米-3.5微米。
- 如权利要求7或8所述的一种基于银粉和PDMS的柔性导电薄膜,其特征在于,所述银粉与所述PDMS薄膜基体的重量比在150wt.%-200wt.%之间。
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