| Summary: | 碩士 === 國立雲林科技大學 === 化學工程與材料工程系 === 104 === Four imidazolium-based and four cyclic ammonium-based ionic liquids (ILs) are synthesized, and they are identified using NMR. The physicochemical properties of ILs are characterized using viscometer, dilatometer, and conductivity meter. The thermal decomposition temperatures and phase transition peaks are determined using thermogravimetric analyzer and differential scanning calorimeter.
The eight ILs / polymer composite electrolytes are prepared using solution-casting method. Each IL, polymer, plasticizer, and solvent are stirred for couple hours, the mixture is coated on the glass and vacuum-dried to eliminate solvent thoroughly. The conductivity of Pyr3NO/polymer composite electrolyte film shows the best conductivity, which is 3.22×10-3 S cm-1 at 393.15K.
Electrochromic devices (ECDs) employ poly (TTPA-co-BTC) as anodic material, poly(3,3-diethyl-3,4-dihydro-2H-thieno-[3,4-b][1,4]dioxepine) (PProDOT-Et2) as cathodic material, and IL / polymer composite electrolyte as the separator between two electrodes are constructed.
The optical contrast, stability, switching time, coloration efficiency, and optical memory of ECDs are characterized using a potentiostat and a UV-visible spectrophotometer Among eight ECDs, poly (TTPA-co-BTC) / Aze4NO-polymer composite / PProDOT-Et2 ECD shows the highest optical contrast, and ΔTmax of the ECD is ca. 40%.
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