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Shape‐Memory Capability of Copolyetheresterurethane Microparticles Prepared via Electrospraying
Author(s) -
Zhang Quanchao,
Sauter Tilman,
Fang Liang,
Kratz Karl,
Lendlein Andreas
Publication year - 2015
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201400267
Subject(s) - materials science , shape memory polymer , shape memory alloy , substrate (aquarium) , polypropylene , composite material , compression (physics) , nanotechnology , chemical engineering , oceanography , engineering , geology
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.