INFLUENCE OF INTERFACE EFFECT ON ADHESION OF CHLORELLA ON TITANIUM ALLOY SURFACE

doi:10.11900/0412.1961.2014.00159

Acta Metall Sin

2014, Vol. 50

Issue (9): 1146-1152 DOI: 10.11900/0412.1961.2014.00159

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INFLUENCE OF INTERFACE EFFECT ON ADHESION OF CHLORELLA ON TITANIUM ALLOY SURFACE

LIAN Feng(

), REN Hongmei, GUAN Shankun, ZHANG Huichen

College of Transportation Equipments and Ocean Engineering, Dalian Maritime University, Dalian 116026

Cite this article:

LIAN Feng, REN Hongmei, GUAN Shankun, ZHANG Huichen. INFLUENCE OF INTERFACE EFFECT ON ADHESION OF CHLORELLA ON TITANIUM ALLOY SURFACE. Acta Metall Sin, 2014, 50(9): 1146-1152.

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Abstract

Laser etching technique was used to build three microstructures of grid, line and dot on Ti6Al4V alloy surface, and sol-gel method was used to coat SiO₂nanoparticles on the microstructure to build the hydrophobic/superhydrophobic surface with the micro/micro-nano structure. Adhesion area of the chlorella on the surfaces was used to evaluate the antifouling performance of the halobios, and dynamic wash test was used to evaluate the adhesion strength of the chlorella. It is shown that the hydrophobic/superhydrophobic surfaces with the microstructure are in accordance with Wenzel model, the superhydrophobic surfaces with the micro-nano structure are in accordance with Cassie model, and have stronger antifouling and less adhesion strength. The grid surfaces have the strongest superhydrophobic and self-cleaning performance, flowed by the line surfaces and then the dot surfaces. The contact angles decrease, the roll angles increase, the antifouling performance gets small and the adhesion strength increase with the increment of space of the microstructure.

Key words: hydrophobic super hydrophobic titanium alloy chlorella adhesion

ZTFLH:

TH117.1

Fund: Supported by National Natural Science Foundation of China (Nos.51275064 and 50975036), Fundamental Research Funds for the Central Universities (No.3132014303) and Industrial Research Program of Liaoning Province (No.2012220006)

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	Feng LIAN
	Hongmei REN
	Shankun GUAN
	Huichen ZHANG

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https://www.ams.org.cn/EN/10.11900/0412.1961.2014.00159 OR https://www.ams.org.cn/EN/Y2014/V50/I9/1146

Fig.1 3D morphologies of laser etching specimens for dot (a, b), line (c, d) and grid (e, f) with spaces of 150 μm (a, c, e) and 450 μm (b, d, f)

Fig.2 Maximum altitudes of the laser etching specimens for dot, line and grid with different spaces

Fig.3 FESEM image (a) and corresponding EDS analysis (rectangle in Fig.3a) (b) of coating on polish specimen

Fig.4 Contact angles of specimens with and without SiO₂ (a) and roll angles of specimens with SiO₂(b)

Fig.5 Immersion pictures of specimens with space 450 μm

Fig.6 Areas of adhesion of specimens

Fig.7 Fall all times of chlorella of specimens

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