%0 Journal Article
%T Shape Memory Effect in Micro-Sized Shape Memory Polymer Composite Chains
%J Applied Sciences | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/app9142919
%X Since the shape memory effect (SME) has been confirmed in micron and submicron sized polyurethane (PU) shape memory polymer (SMP), it might be used in novel micro/nano devices even for surgery/operation inside a single cell. In this study, micron sized protrusive PU SMP composite chains are fabricated via mixing ferromagnetic nickel micro powders with PU SMP/dimethylformamide solution and then cured under a low magnetic field. Depending on the amount of nickel content, vertical protrusive chains with a diameter from 10 to 250 ¦Ìm and height from 200 to 1500 ¦Ìm are obtained. The SME in these chains is investigated to confirm the SME in SMP composites at microscale. An array of such protrusive chains may be utilized to obtain re-configurable surface patterns in a simple manner for applications, such as remarkable change in wetting and friction ability. Finally, its potential applications for micro electro mechanical systems (MEMS) and biomedical device are proposed. View Full-Tex
%U https://www.mdpi.com/2076-3417/9/14/2919