Journal
CHINESE SCIENCE BULLETIN
Volume 56, Issue 9, Pages 938-944Publisher
SCIENCE CHINA PRESS
DOI: 10.1007/s11434-010-4163-7
Keywords
synthetic drag reduction; high-precision; shark skin; synthetic bio-replication; micro-groove; nano-long chain
Categories
Funding
- National Natural Science Foundation of China [50775006]
- National Defense Basic Science Research Special Foundation [D2120060002]
- Key Project of National High-Tech R&D Program of China [2009AA043802]
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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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