Modular lead-free piezoceramic/polymer composites with locally adjustable piezoelectric properties
Modular lead-free piezoceramic/polymer composites with locally adjustable piezoelectric properties
复制标题
具有局部可调压电特性的模块化无铅压电陶瓷/聚合物复合材料
DOI：
10.1016/j.oceram.2022.100320
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Fey Tobias
中科院分区：
文献类型：
--
作者：
Hoffmann Patrizia;K?llner David;Simon Swantje;Kakimoto Ken-ichi;Fey Tobias
无铅压电陶瓷由于其表面电荷和改善的骨细胞粘附性而在骨组织工程领域获得了广泛的关注。然而，整体材料不太适合更复杂的医疗条件，因为性能必须定制和局部适应。因此，我们设计了一种陶瓷构建块和聚合物基质的模块化复合材料，以定制每个块的单独极化的压电性能，同时保持每个阶段的优点。采用注射成型法制备了钛酸钡结构单元，并将其组装成2-2层模块化结构，再用钛酸钡填充（ΦP= 35vol%）的环氧树脂进行粘接。通过Berlincourt方法使用直接激励来确定压电响应，并研究了基质厚度以及各个构建块的不同极化方向的影响。
Lead-free piezoceramics are gaining interest in the field of bone tissue engineering due to their surface charges and improved bone cell adhesion. However, monolithic materials are less suitable for more complex medical conditions, as the properties must be tailored and locally adaptable. Therefore, we designed a modular composite of ceramic building blocks and polymer-matrix to customize the piezoelectric properties with individual polarization of each block, while maintaining the benefits of each phase. Barium titanate building blocks were prepared by injection molding and were assembled into 2-2-layered and modular structures, which were bonded with barium titanate-filled (ΦP= 35 vol %) epoxy resin. The piezoelectric response was determined using direct excitation via Berlincourt method, and the influence of the matrix thickness as well as the different polarization orientations of individual building blocks was investigated.