Achieving the Upper Bound of Piezoelectric Response in Tunable, Wearable 3D Printed Nanocomposites
Achieving the Upper Bound of Piezoelectric Response in Tunable, Wearable 3D Printed Nanocomposites
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DOI：
10.1002/adfm.201903866
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发表时间：
2019-07
影响因子：
19
通讯作者：
Desheng Yao;Huachen Cui;Ryan Hensleigh;Parker Smith;Sam Alford;Dominic Bernero;Sydney Bush;
中科院分区：
文献类型：
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作者：
Desheng Yao;Huachen Cui;Ryan Hensleigh;Parker Smith;Sam Alford;Dominic Bernero;Sydney Bush;
在可加工性和功能响应之间的权衡对将压电材料作为潜在的3D可打印原料提出了巨大的挑战。结构顺应性和机电耦合灵敏度一直是紧密耦合的：高的压电性响应是以低顺应性为代价的。在这里，提出了一类3D可打印、可穿戴的压电纳米复合材料的配方和设计策略，该复合材料在保持高柔度的同时接近压电常数的上限。引入了一个有效的机电界面模型，解释了高浓度钙钛矿型纳米颗粒夹杂物(大于74wt%)与光敏单体基质之间的界面功能化对压电系数显著提高的影响。通过理论计算和实验验证表明，在任何给定的加载浓度下，最大官能化程度都接近压电常数d33的理论上限。在这些发现的基础上，通过设计和3D打印同时实现高机电灵敏度和结构功能的压电材料，作为检测来自不同方向的低压空气(<；50pa)的高灵敏度可穿戴设备，以及用于同时吸收冲击和打击力映射的无线自感知运动手套，证明了它们的适用性。
The trade‐off between processability and functional responses presents significant challenges for incorporating piezoelectric materials as potential 3D printable feedstock. Structural compliance and electromechanical coupling sensitivity have been tightly coupled: high piezoelectric responsiveness comes at the cost of low compliance. Here, the formulation and design strategy are presented for a class of a 3D printable, wearable piezoelectric nanocomposite that approaches the upper bound of piezoelectric charge constants while maintaining high compliance. An effective electromechanical interphase model is introduced to elucidate the effects of interfacial functionalization between the highly concentrated perovskite nanoparticulate inclusions (exceeding 74 wt%) and light‐sensitive monomer matrix, shedding light on the significant enhancement of piezoelectric coefficients. It is shown that, through theoretical calculation and experimental validations, maximizing the functionalization level approaches the theoretical upper bound of the piezoelectric constant d33 at any given loading concentration. Based on these findings, their applicability is demonstrated by designing and 3D printing piezoelectric materials that simultaneously achieve high electromechanical sensitivity and structural functionality, as highly sensitive wearables that detect low pressure air (<50 Pa) coming from different directions, as well as wireless, self‐sensing sporting gloves for simultaneous impact absorption and punching force mapping.