3D‐printed spider web‐inspired sensor with integrated energy‐absorption and force perception capabilities

Abstract

AbstractNature has evolved a myriad of dedicate‐designed structures that assist in prey capture. Spiders employ their web structures for vibrational sensing and prey capture, analogous to a component of a neurosensory system. Here, we propose a spider web‐inspired sensor with integrated energy‐absorption and force perception capabilities by 3D printing. The conductive carbon black/TPU composite made from TPU granules and carbon black particles are employed for 3D printing. We analyze the underlying sensing mechanism of conductive CB/TPU composites stemming from the enhanced dispersion of the CB particles. Through 3D printing method, we are allowed to regulate the structure's form, filling density, arrangement, and printing path to tailor the static mechanical properties, initial resistance, and force sensitivity of the spider‐web inspired structure. The static mechanical model for single silk of the spider‐web inspired structure is constructed. We explore the energy absorption capability of spider‐web inspired structures with different structural parameters, and demonstrate its impact perceiving characteristics at different falling height. Additionally, we assembled a circuit to visually reflect the falling height of the impacting ball through the brightness of the LED light. This study provides insights to endowing structural materials with intelligent characteristics, contributing to their practical applications in the fields of biomedical, soft robotics, and artificial skin, etc.Highlights A spider web‐inspired sensor is 3D printed with CB/TPU composites. The sensor has integrated force perception and energy‐absorption capabilities. The sensitivity capabilities can be regulated by parameter design. The mechanical model of the bioinspired structure is constructed. Its impact perceiving characteristics are demonstrated by two applications.