Luftkissen: Rastermikroskopie mit einem konfokalen Laser ergibt 3D‐Bilder von Luft an unzugänglichen superhydrophoben Grenzflächen (helles Gebiet im Bild). Zwei hydrophobe Zustände – der Wenzel‐ und der Cassie‐Zustand – wurden auf diese Weise quantitativ erfasst. Das 10 μm dicke Luftkissen senkt die Wasseradhäsion dermaßen, dass Wassertröpfchen von der Oberfläche abperlen und dort befindliche Verunreinigungen forttragen (Selbstreinigungseffekt).
The spherical nano-sized bioactive particles in the system of CaO-P2O5-SiO2 were bio-mimetically synthesized using micro-emulsion method. The microstructures and properties of the bio- mimetic nano-materials were characterized using XRD, FTIR, SEM/EDAX and TEM techniques. It was indicated that the nano-particles possessed glassy structural characteristics. The porous composite for bone tissue reconstruction was prepared by compounding poly (hydroxybutyrate-2-co-2-hydroxyvalerate) (PHBV) and the nano-particles of bio-mimetic bioactive glasses (BMBG). Bone-like hydroxyl- carbonate-apatite (HCA) could formed on the surface of porous composite by immersing the composite in simulated body fluid (SBF) at 37°C for 8 hours. With increase of immersion time, the morphology of HCA changed from spherical into flake-like crystals. The study on cells attachment of the porous PHBV/BMBG composite proved that the material possessed satisfactory bioactivity, bio-mineralization function and cells biocompatibility.
The PCL plates hydrolyzed by NaOH aqueous solutions and carboxylate groups were
introduced onto the surfaces of specimen. Specimens were treated by CaCl2 and K2HPO4⋅3H2O under
the normal-pressure condition and low-pressure of 103 Pa condition for 30min separately. Dense and
uniform bone-like layers could be formed on the surface of specimens after mineralizing for less than
24h in simulated body fluids (SBF). The low-pressure condition could accelerate the formation of
apatite layer.
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