Multi-shape-memory effects in a wavelength-selective multicomposite

Abstract

Tuneable shape-memory effects can be achieved in a wavelength-selective multicomposite.

Abstract

Utilizing the distinct photoresponsive behaviour of p-aminodiphenylimide and multi-walled carbon nanotubes, we design a wavelength-selective multicomposite featuring remotely controlled, micro-localized and photo-manipulatable shape-memory behaviors based on three typical segments that are neat epoxy, and the p-aminodiphenylimide/epoxy and multi-walled carbon nanotube/epoxy composites. Herein, p-aminodiphenylimide and multi-walled carbon nanotubes not only act as photoabsorbers and heat sources to induce the shape-memory effect but also as functional components to manipulate shape-memory behavior. In our concept, the quantity of temporary shapes and shape recovery process in the shape-memory cycle can be accurately controlled by a photo-manipulation procedure. Moreover, only one switching domain with sharp thermal transition and a simple shape programming process, similar to those for thermal-responsive dual-shape shape-memory polymers, are required to enable the wavelength-selective multicomposite to present triple- or multi-shape-memory effects. This strategy can be put forward for applications of shape-memory polymers and can be applied in other stimulus-responsive systems to generate complex structures.