收缩膜一触即发,ACS Applied Polymer Materials

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收缩膜一触即发
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2019-04-10 , DOI: 10.1021/acsapm.9b00106
Amber M. Hubbard ₁ , Elton Luong ₁ , Ana Ratanaphruks ₁ , Russell W. Mailen _{1,

2} , Jan Genzer ₁ , Michael D. Dickey ₁

Affiliation

机器人技术和活性材料为抓取和操纵各种几何形状和尺寸的精致物体开辟了道路。迄今为止，大多数软机器人抓手都使用了水凝胶或弹性体，它们可以重复地抓握和操纵小物体。这些抓手中的许多抓手仅在存在溶剂暴露或外部气压的情况下才能实现抓握（由于形状变化）。在这里，我们演示了热塑性聚苯乙烯片材，该片材可响应曝光而从平板驱动到夹具中，并在去除光线后保持其形状。在纸张上形成图案的黑色墨水将整体光照转换为局部加热，从而导致平面纸张变形为a纸牙的形状。与水凝胶或弹性体同类产品相比，这些机械手的耐用性和强度得到了显着改善，因为它们可以支撑自身质量的> 24 000倍。这些抓取器在额外均匀加热后释放物体，每个抓取器充当一次性使用装置。我们报告了样品几何形状和油墨图案对于所产生的三维形状的受控局部加热及其对精度和强度的影响的重要性。基于诸如封装的目标应用，提出了多种用于不受束缚，对刺激敏感的热塑性抓取器的设计。我们报告了样品几何形状和油墨图案对于所产生的三维形状的受控局部加热及其对精度和强度的影响的重要性。基于诸如封装的目标应用，提出了多种用于不受束缚，对刺激敏感的热塑性抓取器的设计。我们报告了样品几何形状和油墨图案对于所产生的三维形状的受控局部加热及其对精度和强度的影响的重要性。基于诸如封装的目标应用，提出了多种用于不受束缚，对刺激敏感的热塑性抓取器的设计。

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Shrink Films Get a Grip

Robotics and active materials have forged the path for grasping and manipulating delicate objects of various geometries and sizes. To date, the majority of soft robotic grippers have used hydrogels or elastomers, which can repeatably grasp and manipulate small objects. Many of these grippers achieve their grip (due to shape change) only in the presence of either solvent exposure or external pneumatic pressure. Here, we demonstrate thermoplastic polystyrene sheets that actuate from flat sheets into grippers in response to light exposure and maintain their shape upon removal of the light. Black ink patterned on the sheet converts global light illumination to localized heating that causes the planar sheet to deform into the shape of a gripper. These grippers have significantly improved endurance and strength compared to their hydrogel or elastomeric counterparts as they can support >24 000 times their own mass. These grippers release objects upon additional uniform heating, and each gripper serves as a single use device. We report the significance of sample geometry and ink patterning for controlled, localized heating upon the resulting three-dimensional shape and its impact on precision and strength. Various designs for untethered, stimuli-responsive thermoplastic grippers are presented based on targeted applications such as encapsulation.

更新日期：2019-04-11

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