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OnderzoekZernike (ZIAM)MCNPMLoos Group

A Simple Route to Nanoporous Metal Foams

Ivana
Ivana
Email I.Vukovic at rug.nl
Phone +31 503634210
Room number

5118.0359  

 

Metal nanofoams with a porosity above 50 v/v % have recently attracted great interest in materials science due to their interesting properties. We demonstrate a new straightforward route to prepare such nanofoams using diblock copolymer-based PS-block-P4VP(PDP) supramolecules that self-assemble into a bicontinuous gyroid morphology, consisting of PS network channels in a P4VP(PDP) matrix. After dissolving the PDP, the P4VP collapses onto the PS struts and a free standing bicontinuos gyroid template of thickness of 50 – 100 μm and interconnected, uniformly-sized pores is formed. The hydrophilic P4VP corona facilitates the penetration of water-based plating reagents into the porous template and enables a successful metal deposition. After plating, the polymer is simply degraded by heating, resulting in a well-ordered inverse gyroid nickel foam. Essential to this approach is the removal of only one part of the matrix (i.e. PDP). Therefore the template accounts for 50 v/v % or more. The porosity characteristics (amount, size of pores) can be tuned by selecting the appropriate copolymer and by adjusting the amount of PDP.

Schematic representation of the preparation of gyroid metallic nanofoam
Schematic representation of the preparation of gyroid metallic nanofoam
Laatst gewijzigd:01 juli 2015 10:54