School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Republic of Singapore.
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Republic of Singapore.
Proc Natl Acad Sci U S A. 2021 Oct 26;118(43). doi: 10.1073/pnas.2113715118.
We demonstrate how programmable shape evolution and deformation can be induced in plant-based natural materials through standard digital printing technologies. With nonallergenic pollen paper as the substrate material, we show how specific geometrical features and architectures can be custom designed through digital printing of patterns to modulate hygrophobicity, geometry, and complex shapes. These autonomously hygromorphing configurations can be "frozen" by postprocessing coatings to meet the needs of a wide spectrum of uses and applications. Through computational simulations involving the finite element method and accompanying experiments, we develop quantitative insights and a general framework for creating complex shapes in eco-friendly natural materials with potential sustainable applications for scalable manufacturing.
我们展示了如何通过标准的数字打印技术在基于植物的天然材料中诱导可编程的形状演变和变形。以非致敏花粉纸作为基底材料，我们展示了如何通过数字打印图案来定制特定的几何特征和结构，以调节疏水性、几何形状和复杂形状。这些自主吸湿形态可以通过后处理涂层“冻结”，以满足广泛用途和应用的需求。通过涉及有限元方法的计算模拟和伴随的实验，我们开发了定量的见解和一个通用框架，用于在环保的天然材料中创建复杂的形状，这些材料具有可持续制造的潜在应用。
