Switchable adhesion via two way shape memory surfaces

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Switchable adhesion via two way shape memory surfaces
NiTi shape memory surface
1.
deformation,
indentation
2.
grinding, replanarization
3.
thermal
stimulation
Switchable adhesion
via two way shape memory surfaces
Mareike Frensemeier / Dr. Elmar Kroner / Prof. Dr. E. Arzt
Doktorandenforum, Leibniz Gemeinschaft Sektion D, Berlin
NiTi/PDMS hybrid system –
Pillar structures for switchable adhesion
Layer with adhesive PDMS pillars.
Moulded. Height: ~40µm, Diam.: ~50µm
RT
Backinglayer, NiTi and PDMS interface.
Spin coated. Thickness ~3µm
TWSME NiTi
heated (80°C)
TWSME NiTi
2
Planarized NiTi Two-way-shape- memory
surface with intrinsic stressfields.
Protrusion pattern. Height ~4µm
Bulging of NiTi protrusions. Height ~4µm
Change of contact area of PDMS pillars.
Loss of adhesion force.
www.inm-gmbh.de
NiTi/PDMS hybrid system –
Pillar structures for switchable adhesion
RT (24 C)
flat
high reversibility
cooled
down 24 C
initial, RT
24 C
heated
(80 C)
structured
heated
80 C
Base of Pillars on PDMS layer on NiTi
3 Switchable surfaces - Introduction PhD – Mareike Frensemeier
www.inm-gmbh.de
THANKS TO YOU AND TO…
Prof. Dr. E. Arzt, Dr. E. Kroner,
Dr. A. Schneider, J. Kaiser
All members of the program division
Functional Surfaces
and Metallic Microstructures
Mareike Frensemeier
INM – Leibniz Institute
for New Materials gGmbH
Campus D2 2
66123 Saarbrücken (Germany)
Phone: +49681 - 93 00 – 312
E-mail:
[email protected]
www.inm-gmbh.de

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