3D-printed in-line and out-of-plane layers with stimuli-responsive intelligence
3D-printed in-line and out-of-plane layers with stimuli-responsive intelligence
复制标题
DOI：
10.1016/j.compositesb.2022.110352
复制
发表时间：
2022-10
期刊：
影响因子：
--
通讯作者：
Dharneedar Ravichandran;Mounika Kakarla;Weiheng Xu;Sayli Jambhulkar;Yuxiang Zhu;Mohammed Bawareth;Nathan Fonseca;Dhanush Patil;Kenan Song
中科院分区：
文献类型：
--
作者：
Dharneedar Ravichandran;Mounika Kakarla;Weiheng Xu;Sayli Jambhulkar;Yuxiang Zhu;Mohammed Bawareth;Nathan Fonseca;Dhanush Patil;Kenan Song
具有形状记忆特性的智能材料和结构由于其独特的记忆其原始形状的能力、尺寸柔性、结构可编程性和多材料兼容性而最近受到关注。它们已在变形结构、热存储、柔性电子、软/微机器人、超材料、生物医学支架和太空任务中得到应用。这些系统的大多数应用需要多功能性，对多种材料进行高精度控制。然而，大多数当前的制造不能在不产生相分离或结构不稳定性的情况下处理不同的材料。这项研究提出了一种新的3D打印工艺，通过多相直接墨水写入（MDIW）机制来生产线内和面外微层。研究了聚醚-热塑性聚氨酯（TPU）/聚己内酯（PCL）和聚酯-热塑性聚氨酯（TPU）/氧化铁（Fe 3 O 4）复合材料的热磁双响应性选择性沉积。在MDIW制造过程中，在每条印刷线内产生用于优化域尺寸的特定子层，其中层沿着z轴堆叠，以研究它们对刺激响应性的影响。力学、热学和热机械表征可以揭示不同介质中的时间-温度-尺寸关系（即，空气和水），显示出精确控制的致动现象，并揭示了它们在国防、能源、健康和可持续性方面的广泛应用。
Smart materials and structures with shape memory properties have recently gained attention due to their unique ability to remember their original shape, dimensional flexibility, structural programmability, and multi-material compatibilities. They have found applications in morphing structures, heat storage, flexible electronics, soft/micro-robotics, metamaterials, biomedical scaffolds, and space missions. Most applications of these systems require multifunctionality with high precision controls over multi-materials. However, most current manufacturing cannot process disparate materials without generating phase separation or structural instabilities. This research presents a new 3D printing process via the Multiphase Direct Ink Writing (MDIW) mechanism to produce in-line and out-of-plane microlayers. The selective deposition of polyether-thermoplastic polyurethane (TPU)/polycaprolactone (PCL) and polyester-TPU/iron oxide (Fe3O4) is investigated for thermal and magnetic dual stimuli-responsiveness. During the MDIW manufacturing, specific sublayers within each printing line for optimized domain size are produced with the stacking of the layers along the z-axis to investigate their influences on the stimuli-responsiveness. The mechanical, thermal, and thermomechanical characterizations can reveal the time-temperature-dimension relationships in different media (i.e., air and water) showing a precisely controlled actuation phenomenon and shedding light on their broad applications in defense, energy, health, and sustainability.