Photothermally Activated EVA / CNT Shape Memory Composites for Dynamic Tactile Surfaces

Photothermally responsive shape memory polymer composites have attracted increasing interest for adaptive and reconfigurable surfaces due to their remote actuation capability and structural simplicity. In this work, ethylene–vinyl acetate (EVA)/carbon nanotube (CNT) composites were developed to achieve infrared‐triggered shape memory actuation with stable mechanical performance. CNTs serve as photothermal fillers, enabling efficient light‐to‐heat conversion and rapid temperature rise under infrared irradiation. The effects of CNT loading on photothermal response, compressive mechanical behavior, and cyclic shape memory performance were systematically investigated. The composites exhibited reliable shape fixation and recovery over repeated programming–recovery cycles, together with stable force–displacement responses under cyclic compression. Based on these properties, the EVA/CNT composites enable reversible surface morphing, which is demonstrated through dynamic tactile labeling structures. This study highlights the potential of photothermally activated polymer composites for functional surface applications requiring durability, repeatability, and remote actuation.