Abstract
Nano-long chains were grafted over the replicated micro-grooves of shark skin in a novel attempt to replicate bio-synthetic drag reduction structure with high precision through synthetic bio-replication. Pre-treated shark skin was used as casting template to prepare a flexible female die of silicone rubber by soft die formation. A waterborne epoxy resin was then used to graft long-chains of drag reduction agent and prepare a synthetic drag reduction shark skin with nano-long chain drag reduction interface and lifelike micro-grooves. Replication precision analysis shows that this technology could replicate the complicated three-dimensional morphology of a biological drag reduction surface with high precision. Drag reduction experiments show that the material had an excellent synthetic drag reduction effect, with a maximal drag reduction rate of up to 24.6% over the velocities tested.
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Zhang, D., Li, Y., Han, X. et al. High-precision bio-replication of synthetic drag reduction shark skin. Chin. Sci. Bull. 56, 938–944 (2011). https://doi.org/10.1007/s11434-010-4163-7
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DOI: https://doi.org/10.1007/s11434-010-4163-7
Keywords
- synthetic drag reduction
- high-precision
- shark skin
- synthetic bio-replication
- micro-groove
- nano-long chain