Refine
Has Fulltext
- no (4) (remove)
Document Type
- Article (3)
- Doctoral Thesis (1)
Language
- English (4)
Is part of the Bibliography
- yes (4) (remove)
Keywords
- microparticles (2)
- shape-memory effect (2)
- biomaterials (1)
- electrospinning (1)
- fiber meshes (1)
- geometry (1)
- hollow microfibers (1)
- processing (1)
- reversible shape-memory effect (1)
- stimuli-sensitive polymers (1)
Institute
Shape-Memory Capability of Copolyetheresterurethane Microparticles Prepared via Electrospraying
(2015)
Multifunctional thermo-responsive and degradable microparticles exhibiting a shapememory effect (SME) have attracted widespread interest in biomedicine as switchable delivery vehicles or microactuators. In this work almost spherical solid microparticles with an average diameter of 3.9 +/- 0.9 mm are prepared via electrospraying of a copolyetheresterurethane named PDC, which is composed of crystallizable oligo(p-dioxanone) (OPDO) hard and oligo(e-caprolactone) (OCL) switching segments. The PDC microparticles are programmed via compression at different pressures and their shapememory capability is explored by off-line and online heating experiments. When a low programming pressure of 0.2 MPa is applied a pronounced thermally-induced shape-memory effect is achieved with a shape recovery ratio about 80%, while a high programming pressure of 100 MPa resulted in a weak shape-memory performance. Finally, it is demonstrated that an array of PDC microparticles deposited on a polypropylene (PP) substrate can be successfully programmed into a smart temporary film, which disintegrates upon heating to 60 degrees C.