%0 journal article
%@ 1438-7492
%A Zhang, Q.,Sauter, T.,Fang, L.,Kratz, K.,Lendlein, A.

%D 2015
%J Macromolecular Materials and Engineering
%N 5
%P 522-530 
%R doi:10.1002/mame.201400267
%T Shape-Memory Capability of Copolyetheresterurethane Microparticles Prepared via Electrospraying
%U https://doi.org/10.1002/mame.201400267
5 
%X Multifunctional thermo-responsive and degradable microparticles exhibiting a shape-memory 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 μm are prepared via electrospraying of a copolyetheresterurethane named PDC, which is composed of crystallizable oligo(p-dioxanone) (OPDO) hard and oligo(ε-caprolactone) (OCL) switching segments. The PDC microparticles are programmed via compression at different pressures and their shape-memory 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 °C.