Three-Dimensional Construction from Two-Dimensional Glassy Polymers via Photothermal Effects

초록

Photothermal heating method has been emerged as a contactless shape manipulating system in materials community. Although numerous methods are documented to achieve 2D to 3D construction, photothermal method has an advantage of using inexpensive near infrared (NIR) light and uniform stimulus with contactless system. The common photothermal method uses black ink patterned hinges on shape memory polymers (SMP) with local light absorption. However, remaining hinges could induce further undesirable actuation after 3D construction. In this study, we employed adhesive tape patterns instead of black ink patterns to achieve transparent 3D structures. The black adhesive tape patterns were irradiated with NIR light to induce local light absorption. When the temperature of the black adhesive patterned area exceeds the polymer’s glass transition temperature, biaxially-stretched polymeric chains recover its conformation to random coils, resulting in contraction. We present the 3D complex structures from radial and chiral 2D tape patterns to control the curvature. We also demonstrate sequential folding by distinct light absorption time. Furthermore, we will discuss shape-morphing with multi-material including papers and conductive paste to reconfigure the 3D structures and conductivity.