Preparation and property optimization of bistable electrochromic microcapsules was written by Wang, Chengcheng;Li, Jiashuang;Zhang, Liping;Fu, Shaohai. And the article was included in Dyes and Pigments in 2022.Quality Control of Crystal violet lactone This article mentions the following:
In the improvement of stability and lifetime of bistable electrochromic (EC) materials, the microcapsule technique was used to protect the EC materials in a polymer shell, which was named bistable EC microcapsules (BEC-Ms). However, the particle size and shell thickness of microcapsules will affect their properties, such as response time, coloration efficiency, and bistable property. In this study, BEC-Ms was prepared via solvent evaporation method filled with PMMA as the shell and the mixture of crystal violet lactone (CVL), tetrabutylammonium perchlorate (TBAP), and phase change material (PCM) as the core. The particle size and shell thickness of microcapsules were adjusted and systematically investigated by controlling the emulsification rate and mass ratio of polymer shell to core. The optimized BEC-Ms with 2 μm size and 22.94 nm thickness showed excellent performance including fast response time (about 1 s), far lower than the safety of human body drive voltage (2 V), coloration efficiency (932 cm2 C-1), and good bistability (216 h). This approach provides a viable and alternative to flexible energy-efficient wearable display-related devices and smart textiles. In the experiment, the researchers used many compounds, for example, Crystal violet lactone (cas: 1552-42-7Quality Control of Crystal violet lactone).
Crystal violet lactone (cas: 1552-42-7) belongs to benzofurans derivatives. Benzofuran is a core structural unit found in many naturally occurring compounds with multidirectional biological activities. They are also prone to polymerisation in the presence of concentrated mineral acids and Lewis acids.Quality Control of Crystal violet lactone
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem