Target weld in wings 3d how to#

However, if direct heat is used to weld bulk CAN blocks, it is likely to cause unwanted permanent deformation of the whole material (although this is important for the remodeling of CAN materials, it is not suitable for welding bulk CAN blocks) because a relatively high pressure is often required to ensure good contact at the interface. Direct heat has distinct advantages as it is compatible with traditional manufacturing processing techniques and it enables CANs to be repurposed for new applications by reshaping or remolding. Current stimuli to induce bond exchange reactions mainly include direct heat and light.

24, 25 The lack of suitable external stimuli to activate bond exchange makes it difficult to weld bulk CAN blocks directly. 22, 23 Assembling bulk CAN blocks into complex 3D structures is of critical importance because the structure of objects often inherently determines their functions. soft robotics with powerful actuation force) compared to their film counterparts. They are irreplaceable for traditional industrial applications and are more functional in many frontier applications ( e.g. Bulk CAN blocks with solid-core geometries have higher tensile strength and excellent anti-cracking capability as well as strong shock resistance ability. However, it is extremely difficult to weld large-sized bulk CAN blocks. Welding also makes it possible to strategically construct heterogeneous 3D structures using covalent bonds, which is impossible for traditional thermosets but significantly affects the application of the materials.

14– 17 Unlike adhesive bonding or mechanical fastening, welding of CANs based on bond exchange reactions can join CAN pieces at a molecular level, which maintains the union of the obtained CAN materials. Welding technology, as an additive manufacturing method, offers good tactics to reuse CANs, which do not require the reprocessing of the whole material thus maintaining the original properties of the non-welded area, to assemble pieces into new structures or to mend the damaged part with new materials.

Target weld in wings 3d how to#

12, 13 How to efficiently realize the recycling of CANs relying on bond exchange reactions is of critical importance. 1– 11 They are especially appealing for a sustainable society since an enormous amount of plastic waste has caused immense trouble. Even though CANs are covalently cross-linked like thermosets which are hard to reprocess, they have notable recyclability while maintaining the commendable features of thermosets such as an infusible structure and high mechanical performance. In the past two decades, polymer science has witnessed the fast blooming of covalent adaptable networks (CANs), which have successfully bridged the distinct gap between traditional thermoplastics and thermosets. The universality and robustness of this strategy is expected to promote CAN application in broader functional polymer fields. Besides, this method can be used to repair damaged CAN materials and efficiently recycle scrap CAN materials, which can effectively save resources and protect the environment.

Using this method, not only CAN bulks with the same materials can be welded to form complex geometries, distinctive bulks with different physical properties and chemical compositions can also be connected to fabricate multimaterial devices. The solder is able to induce a bond exchange reaction at the interface between the to-be-welded pieces. Here we report a welding technique to strategically construct complex and heterogeneous 3D CAN structures by utilizing a solder doped with magnetic nanoparticles. However, it is genuinely difficult to fabricate bulk CAN blocks with solid-core geometries that possess complex shapes or multiple materials, which are crucial in cutting-edge fields such as soft robotics, flexible electronic devices and biomedical engineering. Covalent adaptable networks (CANs) represent a novel covalently cross-linked polymer that is capable of being reprocessed and recycled relying on reversible covalent bond structures and present exceptional opportunities in a wide range of prospective applications.