Simple preparation method for nanometer rod or nanometer wire of piezoelectric polymer
A piezoelectric polymer, nanorod technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, nanotechnology, etc., to achieve the effects of easy operation, simple equipment, and high crystallinity
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Embodiment 1
[0022] Polyvinylidene fluoride-trifluoroethylene copolymer (the molar content of VDF is 50%) was dissolved in acetone to obtain a solution with a concentration of 0.3 wt%. The Si wafers were ultrasonically cleaned in isopropanol, acetone, and deionized water for 5 min, respectively. Place the cleaned Si wafer on the turntable of the homogenizer, and dry the substrate with nitrogen gas. The precursor P(VDF-TrFE) solution was added dropwise onto the Si wafer, and the formed discontinuous film sample was placed on a heating platform, dried and heat-treated at 163 °C for 10 min, and then the film was removed from the heating platform and placed in a room temperature environment for cooling. Drying and non-isothermal crystallization, this process is affected by the combined effects of diffusion limitation and dewetting and volatilization to obtain piezoelectric P(VDF-TrFE) nanorods with a diameter of about 10nm and a length of about 100nm.
Embodiment 2
[0024] Polyvinylidene fluoride-trifluoroethylene copolymer (the molar content of VDF is 60%) was dissolved in methyl ethyl ketone to obtain a solution with a concentration of 0.4 wt%. The gold-plated Si sheet (Si / Au) was ultrasonically cleaned in isopropanol, acetone, and deionized water for 5 min, respectively. Place the cleaned Si / Au sheet on the turntable of the homogenizer, and dry the substrate with nitrogen. A 0.4wt% P(VDF-TrFE) solution was dropped onto the Si / Au sheet, and then spin-coated at a speed of 1000r / min for 30s. The P(VDF-TrFE) thin film sample obtained after spin coating was placed on a heating platform for drying and heat treatment at 160°C for 30 min, and then the film was removed from the heating platform and placed in room temperature environment to cool for drying and non-isothermal crystallization, and finally obtained The piezoelectric P(VDF-TrFE) nanorods grown along a specific direction have a diameter of about 30-100 nm and a length of about 60-50...
Embodiment 3
[0026] Polyvinylidene fluoride-trifluoroethylene copolymer (the molar content of VDF is 70%) was dissolved in dimethylformamide to obtain a solution with a concentration of 0.5 wt%. The glass substrate was ultrasonically cleaned in isopropanol, acetone, and deionized water for 5 min, respectively. Place the cleaned glass substrate on the turntable of the homogenizer, and dry the substrate with nitrogen. Then spin coating at a speed of 3000r / min for 60s. The P(VDF-TrFE) film sample obtained after spin-coating was placed on a heating platform for drying and heat treatment at 150°C for 15 min, and then the film was removed from the heating platform and placed in room temperature environment to cool for drying and non-isothermal crystallization, and finally The obtained piezoelectric P(VDF-TrFE) nanowire has a diameter of about 30-100 nm and a length of about 0.6-3.5 μm. Corresponding results see figure 2 .
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