The art of origami has emerged as an engineering tool with ever increasing potential, but the technique is typically limited to soft and deformable materials. Glass is indispensable in many applications, but its processing options are limited by its brittle nature and the requirement to achieve optical transparency. We report a strategy that allows making three dimensional transparent glass with origami techniques. Our process starts from a dynamic covalent polymer matrix with homogeneously dispersed silica nanoparticles. Particle cavitation and dynamic bond exchange offer two complementary plasticity mechanisms that allow the nanocomposite to be permanently folded into designable geometries. Further pyrolysis and sintering convert it into transparent three dimensional glass. Our method expands the scope of glass shaping and potentially opens up its utilities in unexplored territories.
Natural polymer substrates are gaining attention as substitutes for plastic substrates in electronics, aiming to combine high performance, intricate shape deformation, and environmental sustainability. Herein, natural wood veneer is converted into a transparent wood film (TWF) substrate. The combination of 3D printing and origami technique is established to create programmable wood-based origami electronics, which exhibit superior flexibility with high tensile strength (393 MPa) due to the highly aligned cellulose fibers and the formation of numerous intermolecular hydrogen bonds between them. Moreover, the flexible TWF electronics exhibit editable multiplexed configurations and maintain stable conductivity. This is attributed to the strong adhesion between the cellulose-based ink and TWF substrate by non-covalent bonds. Benefiting from its anisotropic structure, the programmability of TWF electronics is achieved through sequentially folding into predesigned shapes. This design not only promotes environmental sustainability but also introduces its customizable shapes with potential applications in sensors, microfluidics, and wearable electronics.
Song Juqing,Zhu Guanglin,Gao Huichang,Wang Lin,Li Nanying,Shi Xuetao,Wang Yingjun
Inspired by the constitution of things in the natural world, three-dimensional (3D) nanofiber scaffold/cells complex was constructed via the combination of electrospinning technology and origami techniques. The nanofiber boxes prepared by origami provided a limited space for the layer-by-layer nanofiber films, and the human fetal osteoblasts (hFOBs) seeded on the both sides of the nanofiber films were expected to facilitate the bonding of the adjacent nanofiber films through the secretion of extracellular matrix. Specifically, the hFOBs presented 3D distribution in the nanofiber scaffold, and they can stretch across the gaps between the adjacent nanofiber films, forming the cell layers and filling the whole 3D nanofiber scaffold. Eventually, a 3D block composed of electrospun nanofiber scaffold and cells was obtained, which possesses potential applications in bone tissue engineering. Interestingly, we also created 3D nanofiber structures that range from simple forms to intricate architectures via origami, indicating that the combination of electrospinning technology and origami techniques is a feasible method for the 3D construction of tissue engineering scaffolds.
危险品化学品经营许可证（带存储）