Low cycling of eclectic shape memory composites by autoclave moulding

Abstract Eclectic composites are multi-functional hybrid materials obtained by the combination of already existing raw materials, which are engineered for a specific use and are commercially available. Composites adaptability to changing loading and environmental condition is a key feature for high value applications and a strong industrial background favors their implementation in those fields with a complex acceptance process. The rapid growth of the space field requires the development of advanced new materials and eclectic composites seems to have the potential to meet some specific needs. In this work, eclectic shape memory polymer composites are manufactured with the aim of prototyping a grabbing device for small space debris. An epoxy powder, typically used for coatings, is deposited between 2 composite plies of an aeronautic prepreg. Consolidation is performed by vacuum bagging and cure in autoclave; a good level of agglomeration is obtained with voids being undetectable through microscopy. The presence of the interlayer imparts shape memory capabilities to the laminate structure, which are triggered by a heat source. After 50 memory-recovery cycles, the eclectic composites show a mean shape recovery ratio of 99.9% and a mean shape fixity ratio of 47.9%. A grabbing device consisting of 2 eclectic shape memory polymer composite booms is also prototyped. The recovery test is conducted in oven at 200 °C, with the system being able to grab a small electronic board, simulating a space debris, in 3 min.