Kamble Vikram G, Mersch Johannes, Tahir Muhammad, Stöckelhuber Klaus Werner, Das Amit, Wießner Sven
Research Division Elastomers, Leibniz-Institut für Polymerforschung Dresden e.V. (IPF), 01069 Dresden, Germany.
Institute of Materials Science (IfWW), Faculty of Mechanical Science and Engineering, Technische Universität Dresden, 01062 Dresden, Germany.
Materials (Basel). 2022 Jan 5;15(1):390. doi: 10.3390/ma15010390.
The preparation of intelligent structures for multiple smart applications such as soft-robotics, artificial limbs, etc., is a rapidly evolving research topic. In the present work, the preparation of a functional fabric, and its integration into a soft elastomeric matrix to develop an adaptive fiber-elastomer composite structure, is presented. Functional fabric, with the implementation of the shape memory effect, was combined with liquid polybutadiene rubber by means of a low-temperature vulcanization process. A detailed investigation on the crosslinking behavior of liquid polybutadiene rubber was performed to develop a rubber formulation that is capable of crosslinking liquid rubber at 75 °C, a temperature that is much lower than the phase transformation temperature of SMA wires (90-110 °C). By utilizing the unique low-temperature crosslinking protocol for liquid polybutadiene rubber, soft intelligent structures containing functional fabric were developed. The adaptive structures were successfully activated by Joule heating. The deformation behavior of the smart structures was experimentally demonstrated by reaching a 120 mm bending distance at an activation voltage of 8 V without an additional load, whereas 90 mm, 70 mm, 65 mm, 57 mm bending distances were achieved with attached weights of 5 g, 10 g, 20 g, 30 g, respectively.
用于软机器人、假肢等多种智能应用的智能结构制备是一个快速发展的研究课题。在当前工作中，展示了一种功能性织物的制备及其与软弹性体基体的集成，以开发一种自适应纤维 - 弹性体复合结构。具有形状记忆效应的功能性织物通过低温硫化工艺与液态聚丁二烯橡胶相结合。对液态聚丁二烯橡胶的交联行为进行了详细研究，以开发一种能够在75°C交联液态橡胶的橡胶配方，该温度远低于形状记忆合金丝的相变温度（90 - 110°C）。通过利用液态聚丁二烯橡胶独特的低温交联方案，开发了包含功能性织物的软智能结构。自适应结构通过焦耳加热成功激活。通过在无额外负载的情况下，在8V激活电压下达到120mm的弯曲距离，实验证明了智能结构的变形行为，而在分别附加5g、10g、20g、30g重量时，弯曲距离分别达到90mm、70mm、65mm、57mm。
