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Multimaterial 3D Printing of Highly Stretchable Silicone Elastomers
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-06-11 00:00:00 , DOI: 10.1021/acsami.9b04873
Lu-yu Zhou , Qing Gao , Jian-zhong Fu , Qian-yong Chen , Jia-pei Zhu 1 , Yuan Sun , Yong He 2
Affiliation  

3D printing of silicone elastomers with the direct ink writing (DIW) process has demonstrated great potential in areas as diverse as flexible electronics, medical devices, and soft robotics. However, most of current silicones are not printable because of their low viscosity and long curing time. The lack of systematic research on materials, devices, and processes during printing makes it a huge challenge to apply the DIW process more deeply and widely. In this report, aiming at the dilemmas in materials, devices, and processes, we proposed a comprehensive guide for printing highly stretchable silicone. Specifically, to improve the printability of silicone elastomers, nanosilica was added as a rheology modifier without sacrificing any stretching ability. To effectively control print speed and accuracy, a theoretical model was built and verified. With this strategy, silicone elastomers with different mechanical properties can all be printed and can realize infinite time and high speed printing (>25 mm/s) while maintaining accuracy. Here, super-stretchable silicone that can be stretched to 2000% was printed for the first time, and complex structures can be printed with high quality. For further demonstration, prosthetic nose, data glove capable of detecting fingers’ movement, and artificial muscle that can lift objects were printed directly. We believe that this work could provide a guide for further work using the DIW process to print soft matters in a wide range of application scenarios.

中文翻译:

高伸缩性有机硅弹性体的多材料3D打印

通过直接墨水书写(DIW)工艺对有机硅弹性体进行3D打印已显示出在柔性电子,医疗设备和软机器人等众多领域中的巨大潜力。然而,由于它们的低粘度和长的固化时间,大多数当前的有机硅是不可印刷的。在打印过程中缺乏对材料,设备和工艺的系统研究,这使得DIW工艺更深入,更广泛地应用面临着巨大的挑战。在本报告中,针对材料,设备和工艺方面的难题,我们提出了印刷高度可拉伸有机硅的综合指南。具体地,为了提高有机硅弹性体的可印刷性,在不牺牲任何拉伸能力的情况下添加了纳米二氧化硅作为流变改性剂。为了有效控制打印速度和精度,建立并验证了理论模型。通过这种策略,可以打印出具有不同机械性能的有机硅弹性体,并且可以在保持精度的同时实现无限时间和高速打印(> 25 mm / s)。在这里,首次印刷了可拉伸至2000%的超级可拉伸有机硅,并且可以高质量印刷复杂的结构。为了进一步演示,直接打印了假鼻子,能够检测手指运动的数据手套和可以举起物体的人造肌肉。我们相信这项工作可以为使用DIW流程在各种应用场景中打印软质材料的进一步工作提供指南。首次印刷了可拉伸至2000%的超级可拉伸有机硅,可以高质量印刷复杂的结构。为了进一步演示,直接打印了假鼻子,能够检测手指运动的数据手套和可以举起物体的人造肌肉。我们相信这项工作可以为使用DIW流程在各种应用场景中打印软质材料的进一步工作提供指南。首次印刷了可拉伸至2000%的超级可拉伸有机硅,可以高质量印刷复杂的结构。为了进一步演示,直接打印了假鼻子,能够检测手指运动的数据手套和可以举起物体的人造肌肉。我们相信这项工作可以为使用DIW流程在各种应用场景中打印软质材料的进一步工作提供指南。
更新日期:2019-06-11
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