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Fabrication of the infrared variable emissivity electrochromic film based on polyaniline conducting polymer
摘要： In this study, camphorsulfonic acid (CSA)-doped polyaniline (PANI) films have been prepared on the surface of an Au/nylon 66 porous flexible substrate by electrochemical deposition. The feature of the research was that utilize an Au layer deposited onto a porous flexible substrate to deposite CSA-doped PANI film for modulation infrared emissivity at first time. The morphology of Au/nylon 66 flexible substrate and PANI films and the electrochromic properties of CSA-doped PANI film were investigated in detail to obtain a PANI film that possesses highly infrared modulation ability. The emissivity variation Δε was achieved as of 0.225, 0.399, and 0.426 in the wavelength ranges of 3–5, 8–12, and 2.5–25 μm, respectively. The switching times of the CSA doped-PANI film for the coloration and bleaching are 6 s and 2.5 s, respectively. The IR electrochromic film investigated in this work may find an application in IR devices for IR camouflage and thermal control.
关键词： Polyaniline,Electrochemical deposition,Infrared variable emissivity,Flexible electrochromic film
更新于2025-09-23 15:22:29
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Flexible electrochromic tungsten/iron mixed oxide films synthesized by an atmospheric pressure plasma jet
摘要： Flexible electrochromic organo-tungsten- iron oxide (WFexOyCz) films are rapidly deposited onto flexible (60 Ω/□ polyethylene terephthalate/indium tin oxide; PET/ITO) substrates by a low temperature-atmospheric pressure-plasma polymerization method with an atmospheric pressure plasma jet (APPJ) for a short exposed duration of 48 s. The precursor vapors of tungsten hexacarbonyl [W(CO)6] and biscyclopentadienyl iron [ferrocene; Fe(C5H5)2] are mixed with O2 gases at various gas flow rates, injected into air plasma jet and sprayed onto PET/ITO substrates at room temperature (~23oC) and at atmospheric pressure (1.013 × 105 Pa). Flexible electrochromic WFexOyCz films are synthesized with a specific addition of oxygen gases with superior lithium electrochromic properties as demonstrated by a potential sweep alternating between -1 V and 2 V at a scan rate of 40 mV/s in a 1 M LiClO4-propylene carbonate electrolyte. With amorphous WFexOyCz films produced with an APPJ by adding oxygen gases at a specific flow rate of 0.5 sccm, a high value in oxygen deficiency up to 0.189 allows more Li+ ions to intercalate into and deintercalate out of the film. Significant coloration and bleaching are proven by the high values in optical transmittance modulation (ΔT) of up to 70.3%, optical density (ΔOD) up to 0.77 and color efficiency (η) up to 61.3 cm2/C, at a wavelength of 800 nm, respectively.
关键词： Electrochromic materials,Iron oxide,Tungsten oxide,Flexible electrochromic film,Atmospheric pressure plasmas,Plasma polymerization
更新于2025-09-23 15:21:21