Sequential and selective shape memory by remote electrical control

Shape memory (SM) materials have been widely investigated for several years. Most polymers present SM behaviour based on their thermo-mechanical properties. However, they are usually stimulated by an external heating source, hindering industrial application. The addition of carbon nanotubes (CNT) allows turning conventional into electro-active actuators. In this regard, the resistive Joule effect is considerably fast with a low energy cost. most used epoxy resins cured at high temperature diglycidyl ether bisphenol A (DGEBA) aromatic amine hardeners, such as diaminodiohenylsulfone (DDS) and 4,4′diamine-diphenylmetane (DDM). work, were synthesised modification epoxy/amine ratio to vary crosslinking density networks so build up different viscoelastic properties in order tailor behaviour. Electrically conductive nanocomposites manufactured adding CNT percentage above percolation threshold. comparison traditional convection was carried out, confirming higher recovery ratio, speed, applicability electrical stimuli. addition, configuration electrodes design self-deployable remote control. way, common dual-shape (one permanent shape one temporary shape) can easily develop stable shapes. Moreover, control provides sequential selective actuators, enhancing performance developing smart structures capability.