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Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface

Shark skin surfaces show non-smoothness characteristics due to the presence of a riblet structure. In this study, biomimetic shark skin was prepared by using the polydimethylsiloxane (PDMS)-embedded elastomeric stamping (PEES) method. Scanning electron microscopy (SEM) was used to examine the surfac...

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Detalles Bibliográficos
Autores principales: Pu, Xia, Li, Guangji, Huang, Hanlu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Company of Biologists Ltd 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4890670/
https://www.ncbi.nlm.nih.gov/pubmed/26941105
http://dx.doi.org/10.1242/bio.016899
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author Pu, Xia
Li, Guangji
Huang, Hanlu
author_facet Pu, Xia
Li, Guangji
Huang, Hanlu
author_sort Pu, Xia
collection PubMed
description Shark skin surfaces show non-smoothness characteristics due to the presence of a riblet structure. In this study, biomimetic shark skin was prepared by using the polydimethylsiloxane (PDMS)-embedded elastomeric stamping (PEES) method. Scanning electron microscopy (SEM) was used to examine the surface microstructure and fine structure of shark skin and biomimetic shark skin. To analyse the hydrophobic mechanism of the shark skin surface microstructure, the effect of biomimetic shark skin surface microstructure on surface wettability was evaluated by recording water contact angle. Additionally, protein adhesion experiments and anti-algae adhesion performance testing experiments were used to investigate and evaluate the anti-biofouling properties of the surface microstructure of biomimetic shark skin. The recorded values of the water contact angle of differently microstructured surfaces revealed that specific microstructures have certain effects on surface wettability. The anti-biofouling properties of the biomimetic shark skin surface with microstructures were superior to a smooth surface using the same polymers as substrates. Moreover, the air layer fixed on the surface of the biomimetic shark skin was found to play a key role in their antibiont adhesion property. An experiment into drag reduction was also conducted. Based on the experimental results, the microstructured surface of the prepared biomimetic shark skin played a significant role in reducing drag. The maximum of drag reduction rate is 12.5%, which is higher than the corresponding maximum drag reduction rate of membrane material with a smooth surface.
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spelling pubmed-48906702016-06-03 Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface Pu, Xia Li, Guangji Huang, Hanlu Biol Open Research Article Shark skin surfaces show non-smoothness characteristics due to the presence of a riblet structure. In this study, biomimetic shark skin was prepared by using the polydimethylsiloxane (PDMS)-embedded elastomeric stamping (PEES) method. Scanning electron microscopy (SEM) was used to examine the surface microstructure and fine structure of shark skin and biomimetic shark skin. To analyse the hydrophobic mechanism of the shark skin surface microstructure, the effect of biomimetic shark skin surface microstructure on surface wettability was evaluated by recording water contact angle. Additionally, protein adhesion experiments and anti-algae adhesion performance testing experiments were used to investigate and evaluate the anti-biofouling properties of the surface microstructure of biomimetic shark skin. The recorded values of the water contact angle of differently microstructured surfaces revealed that specific microstructures have certain effects on surface wettability. The anti-biofouling properties of the biomimetic shark skin surface with microstructures were superior to a smooth surface using the same polymers as substrates. Moreover, the air layer fixed on the surface of the biomimetic shark skin was found to play a key role in their antibiont adhesion property. An experiment into drag reduction was also conducted. Based on the experimental results, the microstructured surface of the prepared biomimetic shark skin played a significant role in reducing drag. The maximum of drag reduction rate is 12.5%, which is higher than the corresponding maximum drag reduction rate of membrane material with a smooth surface. The Company of Biologists Ltd 2016-03-03 /pmc/articles/PMC4890670/ /pubmed/26941105 http://dx.doi.org/10.1242/bio.016899 Text en © 2016. Published by The Company of Biologists Ltd http://creativecommons.org/licenses/by/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.
spellingShingle Research Article
Pu, Xia
Li, Guangji
Huang, Hanlu
Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface
title Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface
title_full Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface
title_fullStr Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface
title_full_unstemmed Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface
title_short Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface
title_sort preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4890670/
https://www.ncbi.nlm.nih.gov/pubmed/26941105
http://dx.doi.org/10.1242/bio.016899
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