Three-dimensional(3 D)printing has had a large impact on various fields,with fused deposition modeling(FDM)being the most versatile and cost-effective 3 D printing technology.However,FDM often requires sacrificial sup...Three-dimensional(3 D)printing has had a large impact on various fields,with fused deposition modeling(FDM)being the most versatile and cost-effective 3 D printing technology.However,FDM often requires sacrificial support structures,which significantly complicates the processing and increases the cost.Furthermore,poor layer-to-layer adhesion greatly affects the mechanical stability of 3D-printed objects.Here,we present a new Print-Healing strategy to address the aforementioned challenges.A polymer ink(Cu-DOU-CPU)with synergetic triple dynamic bonds was developed to have excellent printability and room-temperature self-healing ability.Objects with various shapes were printed using a simple compact 3D printer,and readily assembled into large sophisticated architectures via self-healing.Triple dynamic bonds induce strong binding between layers.Additionally,damaged printed objects can spontaneously heal,which significantly elongates their service life.This work paves a simple and powerful way to solve the key bottlenecks in FDM 3D printing,and will have diverse applications.展开更多
Recent interior carving methods for functional design necessitate a cumbersome cut-and-glue process in fabrication.Wepropose a method to generate interior voids which not only satisfy the functional purposes but are a...Recent interior carving methods for functional design necessitate a cumbersome cut-and-glue process in fabrication.Wepropose a method to generate interior voids which not only satisfy the functional purposes but are also support-free during the 3D printing process.We introduce a support-free unit structure for voxelization and derive the wall thicknesses parametrization for continuous optimization.Wealso design a discrete dithering algorithm to ensure the printability of ghost voxels.The interior voids are iteratively carved by alternating the optimization and dithering.We apply our method to optimize the static and rotational stability,and print various results to evaluate the efficacy.展开更多
基金supported by the National Natural Science Foundation of China(21991123,52073049 and 51703148)the Natural Science Foundation of Shanghai(20ZR1402500 and18ZR1401900)+4 种基金the Belt&Road Young Scientist Exchanges Project of Science and Technology Commission Foundation of Shanghai(20520741000)Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-dimension Materials(Donghua University(DHU),18520750400)the Fundamental Research Funds for the Central UniversitiesDHU Distinguished Young Professor Program(LZA2019001)the Open Research Fund of Shanghai Center for High-performance Fibers and Composites and the Center for Civil Aviation Composites of Donghua University。
文摘Three-dimensional(3 D)printing has had a large impact on various fields,with fused deposition modeling(FDM)being the most versatile and cost-effective 3 D printing technology.However,FDM often requires sacrificial support structures,which significantly complicates the processing and increases the cost.Furthermore,poor layer-to-layer adhesion greatly affects the mechanical stability of 3D-printed objects.Here,we present a new Print-Healing strategy to address the aforementioned challenges.A polymer ink(Cu-DOU-CPU)with synergetic triple dynamic bonds was developed to have excellent printability and room-temperature self-healing ability.Objects with various shapes were printed using a simple compact 3D printer,and readily assembled into large sophisticated architectures via self-healing.Triple dynamic bonds induce strong binding between layers.Additionally,damaged printed objects can spontaneously heal,which significantly elongates their service life.This work paves a simple and powerful way to solve the key bottlenecks in FDM 3D printing,and will have diverse applications.
文摘Recent interior carving methods for functional design necessitate a cumbersome cut-and-glue process in fabrication.Wepropose a method to generate interior voids which not only satisfy the functional purposes but are also support-free during the 3D printing process.We introduce a support-free unit structure for voxelization and derive the wall thicknesses parametrization for continuous optimization.Wealso design a discrete dithering algorithm to ensure the printability of ghost voxels.The interior voids are iteratively carved by alternating the optimization and dithering.We apply our method to optimize the static and rotational stability,and print various results to evaluate the efficacy.
