Song Seo Woo, Lee Sumin, Choe Jun Kyu, Kim Na-Hyang, Kang Junwon, Lee Amos Chungwon, Choi Yeongjae, Choi Ahyoun, Jeong Yunjin, Lee Wooseok, Kim Ju-Young, Kwon Sunghoon, Kim Jiyun
Bio-MAX Institute, Seoul National University, Seoul 08826, South Korea.
Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, South Korea.
Sci Adv. 2021 Mar 24;7(13). doi: 10.1126/sciadv.abf3804. Print 2021 Mar.
Pen drawing is a method that allows simple, inexpensive, and intuitive two-dimensional (2D) fabrication. To integrate such advantages of pen drawing in fabricating 3D objects, we developed a 3D fabrication technology that can directly transform pen-drawn 2D precursors into 3D geometries. 2D-to-3D transformation of pen drawings is facilitated by surface tension-driven capillary peeling and floating of dried ink film when the drawing is dipped into an aqueous monomer solution. Selective control of the floating and anchoring parts of a 2D precursor allowed the 2D drawing to transform into the designed 3D structure. The transformed 3D geometry can then be fixed by structural reinforcement using surface-initiated polymerization. By transforming simple pen-drawn 2D structures into complex 3D structures, our approach enables freestyle rapid prototyping via pen drawing, as well as mass production of 3D objects via roll-to-roll processing.
笔画绘制是一种能够实现简单、低成本且直观的二维（2D）制造的方法。为了将笔画绘制的这些优点整合到三维物体制造中，我们开发了一种三维制造技术，该技术可以直接将笔画绘制的二维前驱体转变为三维几何形状。当将笔画浸入水性单体溶液中时，表面张力驱动的毛细管剥离和干燥墨膜的漂浮有助于笔画从二维转变为三维。对二维前驱体的漂浮和固定部分进行选择性控制，可使二维图形转变为设计好的三维结构。然后，通过表面引发聚合进行结构增强来固定转变后的三维几何形状。通过将简单的笔画绘制二维结构转变为复杂的三维结构，我们的方法不仅能够通过笔画绘制实现自由式快速成型，还能通过卷对卷加工实现三维物体的大规模生产。
