Curved surface conformal 4D printing method of thin-wall heterostructure and heterostructure

Abstract

The curved surface conformal 4D printing method comprises the steps that a three-dimensional model of a target curved surface heterogeneous functional structure is constructed, and the three-dimensional model is segmented, unfolded and converted into a temporary plane structure; selecting an amorphous polymer and a conductive material, and performing planar heterogeneous processing on the temporary planar structure; carrying out atomization treatment by using a polymer organic solvent; heating the temporary plane structure and the to-be-conformal curved surface so that the polymer material in the temporary plane structure is completely converted into a rubber state; and performing curved surface conformal fitting, adjusting and calibrating, and cooling to obtain the target curved surface conformal thin-wall heterogeneous functional structure. Through the treatment of heating, softening, shaping and cooling, hardening and shaping of an amorphous polymer matrix, 4D deformation of a simple temporary structure to a complex target structure is achieved, the difficulty that a curved surface heterogeneous functional structure is directly and integrally formed with the target structure is lowered, the curved surface assembly problem caused by manufacturing errors is avoided, and the forming precision is high; and the stability of the performance of electromagnetic and electronic devices is ensured.

Description

technical field [0001] The invention belongs to the field of 4D printing and manufacturing, and in particular relates to a curved surface conformal 4D printing method of a thin-walled heterogeneous structure and the heterogeneous structure. Background technique [0002] Due to the difference in resistivity, dielectric and conductive materials are widely combined and used in various electromagnetic and electronic devices. However, with the development of miniaturization and thinning of smart devices, surface conformality of thin-walled heterogeneous functional structures is a key technology for next-generation electromagnetic and electronic devices. Advanced functional materials and processing technology have become research hotspots in recent years. Amorphous polymer is a kind of dielectric material, which can realize the reversible transition between polymer glass state and rubber state through external temperature changes, and is widely used in the field of 4D printing. ...

AI Technical Summary

Problems solved by technology

[0004] Existing planar processing methods such as PCB technology and other planar metal and dielectric heterogeneous structures cannot realize the manufacture of curved surface conformal electromagnetic and electronic devices

Although the flexible electronic circuit technology using flexible substrates can deform the curved surface to a certain extent, the slipping and dislocation of the conductive structure due to its uncontrollable structural deformation may have a significant impact on the performance of electromagnetic and electronic devices; such as surface transfer, The method of additive manufacturing of conductive materials on curved dielectric substrates, such as laser direct forming and ink direct writing, is difficult to process, high in cost and limited in forming area. Rigid curved substrates are difficult to perfectly conform to the target surface due to manufacturing errors.

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