Porous shape memory polymers: Design and applications

Abstract

Porous shape memory polymers (SMPs) exhibit geometric and volumetric shape change when actuated by an external stimulus and can be fabricated as foams, scaffolds, meshes, and other polymeric substrates that possess porous three-dimensional macrostructures. These materials have applications in multiple industries such as textiles, biomedical devices, tissue engineering, and aerospace. This review article examines recent developments in porous SMPs, with a focus on fabrication methods, methods of characterization, modes of actuation, and applications.

Influence of programming strain rates on the shape‐memory performance of semicrystalline multiblock copolymers

“…The obtained anisotropic scattering patterns were integrated over a 10° wide azimuthal range along the axis of symmetry (fiber axis, s 3 ). The long period L was extracted from the position of the peak maxima of the Kratky‐plot after Lorenz correction Is vs. s , where s is the scattering vector as L = s −1 . The error for L was estimated as ±0.2 nm.…”

“…Shape‐memory polymers (SMPs) are smart polymeric materials with the capability to temporarily fix a second shape and recover to their original shapes by application of external stimuli . In this context multifunctional polymer‐based biomaterials, which combine, for example, degradability with a shape‐memory effect (SME) were explored as materials for novel biomedical implants such as an annulus closure device, drainage catheter, foams for embolic applications, or cell culture surfaces .…”

A novel fractional viscoelastic constitutive model for shape memory polymers

“…Compared to shape memory alloys and shape memory ceramics, SMPs have many unique advantages: low density, easily tailored properties, low cost, and especially large deformation recovery capacity . These novel characteristics have put SMPs in the limelight of research arena for the past three decades with investigations focusing toward the potential applications of SMPs, for example, deployable structures, biomedical devices, smart textiles, and self‐healing composite systems …”

“…[1][2][3][4] These novel characteristics have put SMPs in the limelight of research arena for the past three decades with investigations focusing toward the potential applications of SMPs, for example, deployable structures, biomedical devices, smart textiles, and self-healing composite systems. [5][6][7][8][9] Shape memory recovery triggered by temperature is known as thermally induced shape memory effect. The typical thermomechanical circle of thermally induced SMPs can be described as: deform the SMP under external forces at a high temperature; decrease the temperature while maintaining the deformed shape; remove the external forces; reheat the SMP and it recovers to the original shape.…”

Rigid High Temperature Heat-Shrinkable Polyimide Tubes with Functionality as Reducer Couplings

“…Many aspects of SMPs such as multi-stage, multi-functional, two-way reversible, composite, porous and fibrous SMPs have been flourishing in recent years2122232425262728. However, the reports about SMPs have mainly focused upon their applications in textiles, biomedical devices, tissue engineering and aerospace29303132333435.…”