A thin film structure that folds automatically and directionally under thermal excitation

Abstract

The invention discloses a film structure capable of being folded automatically and directionally under thermal excitation and relates to the field of isotropic thermal deformation materials. Accordingto the film structure, the technical problems that as for an existing deformation material capable of being folded automatically under thermal excitation, the bending direction is uncontrollable, andaccuracy is low are solved. The film structure capable of being folded automatically and directionally under thermal excitation comprises a substrate, a flexible adhesive, a thermal deformation filmand a plurality of slits, wherein the flexible adhesive is arranged on the substrate along a fold, the thermal deformation film covers the flexible adhesive, and the multiple slits are perpendicular to the fold and completely penetrate through the thermal deformation film and the flexible adhesive in the depth direction. By adopting the original method and utilizing a common isotropic thermal deformation material and by means of an existing automatic production process, accurate control over the fold position and the folding direction of the deformable film is achieved, and preparation of thedeformable film is simplified greatly.

Description

technical field [0001] The invention relates to the field of isotropic heat-deformable materials. Background technique [0002] The low-cost continuous preparation of origami-type honeycomb structures and thin-film metamaterials urgently requires a new type of deformable thin film that can use isotropic thermally deformable materials and existing automated production processes to achieve precise control of crease position and folding direction. [0003] In recent years, researchers have proposed a variety of smart materials that can automatically fold and deform under thermal excitation. The deformation often uses the material's shape memory effect, thermal expansion and contraction, or stress relaxation. Its basic principle is similar to that of a bimetal sheet, that is, when a layer of thermally deformable material is consolidated with a layer of relatively stable base material, thermal deformation, such as thermal shrinkage, will bend the material. The problem with this ...

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Problems solved by technology

[0006] The present invention aims to solve the current technical problem that the bending direction of the automatic folding deformation material under thermal excitation is uncontrollable and the accuracy is low, and provides a film structure that automatically orientates and folds under thermal excitation

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