Nanostructure integrated shape memory materials

Abstract

Poly(lactic acid) is a shape-memory polymeric material (SMPs) that attracts both industrial and scientific interest because it is biodegradable and of bioderivation.(4D printing) Its non-petrochemical based nature, elastic modulus and high tensile strength, biocompatibility and non-toxic also make PLA an ideal material for practical use in contact with the human body. The enhanced phase continuity along the deformation direction and the vigorous shearing effect the temporary shape fixing and the continuous shape recovery. Pure Poly(lactic acid) (PLA) were produced by hot laminating. After PLA was prepared as shape memory material and cut into rectangular shape. The shape memory properties of PLA were examined. For the shape memory testing, PLA was fixed to temporary shape.. Shape fixity (Rf) and shape recovery (Rr) rates were calculated by determining angle values based on thermo-mechanical recovery tests.The obtained results sugest that the shape memory behavior of PLA is controlled according to preparation conditions.