3D printed architected conducting polymer hydrogels
3D printed architected conducting polymer hydrogels
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3D打印结构导电聚合物水凝胶
DOI：
10.1039/d1tb00877c
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发表时间：
2021-06-08
影响因子：
7
通讯作者：
Wang, Yue
中科院分区：
文献类型：
--
作者：
Jordan, Robert S.;Frye, Jacob;Wang, Yue
导电聚合物水凝胶结合了导电性和可调水含量，使其成为生物传感器、细胞培养平台和能量存储设备等一系列应用的有力候选者。然而，这些水凝胶在机械上是脆性的，容易损坏，这使得它们不能用于涉及动态运动和大机械变形的新兴应用。在这里，我们证明了将结构的概念应用于导电聚合物水凝胶可以绕过这些障碍。开发了一种立体光刻三维打印方法，成功地在复杂的晶格结构中制备了这种水凝胶。得到的水凝胶具有弹性可压缩性、高断裂应变、增强的循环稳定性和损伤容忍性，尽管它们的化学组成与脆性固体凝胶相同。此外，将变形集中到3D几何形状，而不是聚合物微结构，有效地将水凝胶晶格的机械和电学特性与其与其化学组成相关的内在特性分离。导电聚合物水凝胶的这些新的物理性质的融合为无数动态应用打开了广阔的机会。
Conducting polymer hydrogels combine electrical conductivity and tunable water content, rendering them strong candidates for a range of applications including biosensors, cell culture platforms, and energy storage devices. However, these hydrogels are mechanically brittle and prone to damage, prohibiting their use in emerging applications involving dynamic movement and large mechanical deformation. Here, we demonstrate that applying the concept of architecture to conducting polymer hydrogels can circumvent these impediments. A stereolithography 3D printing method is developed to successfully fabricate such hydrogels in complex lattice structures. The resulting hydrogels exhibit elastic compressibility, high fracture strain, enhanced cycling stability, and damage-tolerant properties despite their chemical composition being identical to their brittle, solid counterparts. Furthermore, concentrating the deformation to the 3D geometry, rather than polymer microstructure, effectively decouples the mechanical and electrical properties of the hydrogel lattices from their intrinsic properties associated with their chemical composition. The confluence of these new physical properties for conducting polymer hydrogels opens broad opportunities for a myriad of dynamic applications.