柔性电弹性体通过可混性驱动的尼特分子旋转来实现
Moonseok Jang1, Bitgaram Kim1,2, Ji-Hun Seo1
1Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|November 7, 2025
概括
这项研究探讨了聚合物网络中的苏奇尼尼特 (SN) 塑料晶体中的柔电性. 交叉连接的基于SN的复合材料展示了高效的机械到电能转换,突出了软材料的设计原则.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 聚合物科学 聚合物科学
背景情况:
- 塑料晶体具有独特的顺序/混乱特性,在应变梯度下允许柔电,尽管缺乏压电.
- 一种极性塑料晶体苏奇尼尼特 (SN),由于其分子动力学,显示出电机应用的潜力.
- 之前的研究集中在纯或合的SN上,不探讨聚合物网络的影响.
研究的目的:
- 研究共振交联聚合物网络如何影响SN的旋转动力学和柔电性质.
- 确定聚合物-SN混合性,微观结构,分子移动性和机电合之间的关系.
- 建立用于机械到电能转换的新型软材料的设计原则.
主要方法:
- 在复合网中聚合物-SN混合性的系统变化.
- 在机械应力下测量机电性能 (电压,电流) (手指敲击).
- 通过三点曲试验,通过介电分析和DFT计算来确定柔电系数.
主要成果:
- SN_MMA复合材料表现出最高的电机性能,产生2.79 V和0.082 μA cm−2.2.
- 在SN_MMA复合材料中记录了22.8 nC m-1的最高柔电系数.
- 最佳性能归因于界面应力局部化,并保留了聚合物网络内的 SN 定向自由.
结论:
- 联交联的聚合物网络可以显著增强succinonitrile的柔电特性.
- 微观结构和SN分子流动性是实现这些软材料高效电机械合的关键因素.
- 该SN_MMA复合材料作为设计高性能,非零电能收获材料的模型.
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