Origami by frontal photopolymerization
Zeang Zhao,Zeang Zhao,Jiangtao Wu,Xiaoming Mu,Haosen Chen,H. Jerry Qi,Daining Fang,Daining Fang +7 more
TLDR
A simple approach for creating three-dimensional origami structures by the frontal photopolymerization method, which can be easily implemented by using a commercial projector and can be controlled by adjusting the gray scale and the irradiation time.Abstract:
Origami structures are of great interest in microelectronics, soft actuators, mechanical metamaterials, and biomedical devices. Current methods of fabricating origami structures still have several limitations, such as complex material systems or tedious processing steps. We present a simple approach for creating three-dimensional (3D) origami structures by the frontal photopolymerization method, which can be easily implemented by using a commercial projector. The concept of our method is based on the volume shrinkage during photopolymerization. By adding photoabsorbers into the polymer resin, an attenuated light field is created and leads to a nonuniform curing along the thickness direction. The layer directly exposed to light cures faster than the next layer; this nonuniform curing degree leads to nonuniform curing–induced volume shrinkage. This further introduces a nonuniform stress field, which drives the film to bend toward the newly formed side. The degree of bending can be controlled by adjusting the gray scale and the irradiation time, an easy approach for creating origami structures. The behavior is examined both experimentally and theoretically. Two methods are also proposed to create different types of 3D origami structures.read more
Citations
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References
More filters
Journal ArticleDOI
NIH Image to ImageJ: 25 years of image analysis
TL;DR: The origins, challenges and solutions of NIH Image and ImageJ software are discussed, and how their history can serve to advise and inform other software projects.
Book
Infrared and Raman Characteristic Group Frequencies: Tables and Charts
TL;DR: This new edition of this highly successful manual is not only a revised text but has been extended to meet the interpretive needs of Raman users as well as those working in the IR region, creating a uniquely practical, comprehensive and detailed source for spectral interpretation.
Journal ArticleDOI
Analysis of Bi-Metal Thermostats
TL;DR: In this article, a general theory of bending of a bi-metal strip submitted to a uniform heating is presented, which is applied in analysis of the operation of a Bi-metal Strip thermostat.
Journal ArticleDOI
Biomimetic 4D printing
A. Sydney Gladman,A. Sydney Gladman,Elisabetta A. Matsumoto,Elisabetta A. Matsumoto,Ralph G. Nuzzo,Lakshminarayanan Mahadevan,Lakshminarayanan Mahadevan,Jennifer A. Lewis,Jennifer A. Lewis +8 more
TL;DR: In this article, a plant-inspired shape morphing system is presented, where a composite hydrogel architecture is encoded with localized, anisotropic swelling behavior controlled by the alignment of cellulose fibrils along prescribed four-dimensional printing pathways.