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- Title
基于快速响应 f-La<sub>2</sub>O<sub>3</sub>/PANI 电致变色薄膜的 制备与性能表征.
- Authors
戴彦; 徐子芳; 傅宇豪; 张翔
- Abstract
Based on the fact that electrochromic films have important research and development prospects in military camouflage, building energy saving, automobiles and other industrial fields, the surface of La2O3 was modified by silane coupling agent KH-550 and compounded with conductive polymer polyaniline (PANI) to prepare f-La2O3/PANI electrochromic material. Comparative analysis of composite electrode and pure PANI electrode by XRD, FTIR, SEM-EDS, UV-vis, and electrochemical workstation. The effect of f-La2O33 addition on the structure, morphology, electrochemical properties and electrochromic properties of PANI was investigated. The results show that the incorporation of f-La2O3 makes the PANI fibers tend to be smaller, and the composite material has higher crystallinity and molecular chain orientation than pure PANI; f-La2O3 will break the network cross-linking structure of PANI, resulting in a decrease in the electrochemical performance of the composite, but it can accelerate the transition process of PANI protonation and deprotonation, and effectively inhibit the oxidative degradation of PANI during the electrochromic process of the film; When f-La2O3/aniline molar ratio is 1∶3.5, the electrochromic performance of f-La2O3/PANI composite reaches the best, the coloration efficiency (CE) at 570 nm is 22.81 cm² ·C−1, and the fading and coloring response time (τb, τc ) are 1.29 s and 1.33 s, respectively. After 320 cycles of fading, the electrochemical activity of the thin films remains about 50% of the initial value.
- Subjects
SILANE coupling agents; ELECTROCHROMIC substances; MOLECULAR orientation; THIN films; X-ray diffraction; FIBROUS composites
- Publication
Acta Materiae Compositae Sinica, 2023, Vol 40, Issue 4, p2199
- ISSN
1000-3851
- Publication type
Article
- DOI
10.13801/j.cnki.fhclxb.20220623.007