Researchers from the Georgia Institute of Technology, the Singapore Institute of Technology and Design, and the Xi'an Jiaotong University in China have recently produced objects by printing shape-memory polymer layers on multi-material 3D printers. Each layer of these polymer layers does not react when heated. same. This new approach greatly simplifies the process and increases the potential for 4D printing, even opening a new door for product design. A grid made by Georgia Tech's multi-material 3D printer can be permanently extended to eight times its original width after heating. A group of researchers from Georgia Institute of Technology and two other institutions have developed a new 3D printing method that can be used to create objects that can be permanently converted to a range of different shapes in response to heat. This includes a team of researchers from the Singapore University of Technology and Design (SUTD) and Xi'an Jiaotong University in China, who produce objects by printing shape-memory polymer layers, each of which reacts differently when heated. "By incorporating the mechanical programming post-processing steps directly into the 3D printing process, this new approach greatly simplifies the process and increases the potential for 4D printing," said Jerry Qi, "This allows Georgia Tech's high-resolution 3D printing components to pass Computer simulations, made with 3D printing, then directly and quickly into new permanent shapes by simple heating." The study was published in the April 12 issue of Science Advance, a publication of the American Association for the Advancement of Science. This work was funded by the U.S. Air Force Scientific Research Office, the National Science Foundation, and was funded by the Singapore National Research Foundation through the SUTDD ManD Center. Their development of these new 3D printed objects uses what the team had previously done - using smart shape memory polymers (SMP), which can remember one shape and change to another when they are heated uniformly Design the shape so that the object can fold itself along the hinge. "This approach can save up to 90% in printing time and printed materials, while eliminating time-consuming mechanical programming in the design and manufacturing processes," said Qi. To illustrate the capabilities of the new process, the team produced several objects that could be quickly bent or opened when entering hot water - including a flower that can be curved in response to sunlight like a real daisy, and A lattice-like object that can grow to nearly eight times its original size. "Our composites contain a soft material at room temperature that can be internally stressed by procedures, while other materials are hard," said Zhen Ding, a postdoctoral researcher at the Singapore University of Science and Technology. “We use computational simulations to design composite parts where the shape and size of the rigid material can prevent the internal stress of the soft material release procedure after 3D printing. After heating, the hard material softens, allowing the soft material to relieve its stress. , and this will lead to changes in the shape of the product - and this change is usually very large. This new four-dimensional object can make a range of new product features possible, such as being able to lay flat or roll up during transport, and then deploy the product once during use, the researchers said. Ultimately, this technology allows components to respond to stimuli such as temperature, humidity, or light in a precise, timed manner to create spatial structures, built-in medical devices, robots, toys, and many other structures. “The major progress of this work is a greatly simplified four-dimensional printing method that enables us to manufacture high-resolution 3D complex programmable products,†said Martin L. Dunn of the Singapore University of Science and Technology, who is also the Singapore University of Technology and Design. Director of Digital Manufacturing and Design Center. "It promises to make numerous applications in the fields of biomedical equipment, three-dimensional electronics, consumer products, etc. It even opens up a new door for product design, where components are initially designed to be used There are many configurations in the process.
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Researchers from the Georgia Institute of Technology, the Singapore Institute of Technology and Design, and the Xi'an Jiaotong University in China have recently produced objects by printing shape-memory polymer layers on multi-material 3D printers. Each layer of these polymer layers does not react when heated. same.
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