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Creation of microstructured polymers with defined micro and nano pores for different applications using hot embossing and CO₂ [in press]

Wiegand, Gabriele; Hölscher, Hendrik ORCID iD icon; Johnsen, Siegbert; Schneider, Marc 1; Syurik, Julia; Worgull, Matthias
1 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Porous polymer materials are essential for a broad range of applications such as automobile parts, medical implants, filtration systems, and catalytic reactors due to a combination of their durability, low weight and cost, and high inner surface. For various of these applications, it is favorable to manufacture microstructures with pores in the range from micrometers to nanometers, also with defined gradients.
In a novel approach, two hitherto separately applied methods, namely hot embossing for microstructuring of polymers and saturation with CO2 under pressure at different temperatures and exposure times are now combined: (i) In a first step, a polymer is microstructured by hot embossing. (ii) In a second step, these microstructures are exposed to CO2 for the pore production. Afterwards they are thermally treated also at different temperatures for different durations.
By the combination of these two methods, with a so far completely different application spectrum, the original material properties of the polymers are modified. Microstructured materials with interconnected pores can be fabricated, but also pore gradients from micro to nano size exhibiting improved mechanical and physico-chemical properties. ... mehr

Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Mikrostrukturtechnik (IMT)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2018
Sprache Englisch
Identifikator KITopen-ID: 1000089248
HGF-Programm 35.14.01 (POF III, LK 01) Effiziente Nutzung geothermisch. Energie
Erschienen in 12th International Symposium on Supercritical Fluids (ISSF 2018), Antibes-Juan-les-Pins, F, April 22-25, 2018
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