基于碳醇的双带电色聚合物:链接部位对电色性能的影响
Peiyu Wu1,2,3, Shengxiong Zhang1, Yuzhou Wu1
1Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
ACS applied materials & interfaces
|October 17, 2024
概括
新的双带电色聚合物 (EC) 提供了更好的节能建筑材料. 与PDPPCz27相比,PDPPCz36显示出更高的循环稳定性和更快的切换速度,解决了EC技术的关键局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 双带电色 (EC) 材料对节能应用具有前景,但循环稳定性仍然是一个挑战.
- 现有的EC材料往往在长期耐用性和响应时间方面扎,这阻碍了它们在建筑材料中的广泛采用.
研究的目的:
- 合成和评估用于双带电色应用的新型DA结合聚合物.
- 研究碳素结合点对电色聚合物的性能和稳定性的影响.
- 为节能窗户和显示器识别具有增强循环稳定性和更快响应时间的材料.
主要方法:
- 合成两种基于二甲基基合聚合物 (PDPPCz36和PDPPCz27),具有不同的碳素结合点.
- 双带电色特性的表征,包括可见 (VIS) 和近红外 (NIR) 区域的光调制.
- 通过重复的氧化还原循环和响应时间的测量来评估循环稳定性.
主要成果:
- 无论是PDPPCz36还是PDPPCz27,都表现出双频段EC行为,显示深蓝中性状态和氧化后的NIR吸收.
- PDPPCz36表现出更高的初始光调制率 (43.0%在VIS中) 和显著更好的周期稳定性 (32%的下降与PDPPCz27在100个周期后>50%相比).
- 在VIS (0.4秒) 和NIR (0.7秒) 区域中,PDPPCz36实现了次秒切换时间,超过PDPPCz27 (分别为2.1秒和1.6秒).
结论:
- 在PDPPCz36中,3,6链的碳醇结构有效地抑制了副作用和膜聚合.
- 这种结构优势使得PDPPCz36.3的氧化还原稳定性和更快的切换动力学得到了增强.
- PDPPCz36代表了先进的双带电色应用的有希望的候选者,特别是在节能建筑材料中.
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