4.7 Article

A biomimetic nano hybrid coating based on the lotus effect and its anti-biofouling behaviors

Journal

APPLIED SURFACE SCIENCE
Volume 315, Issue -, Pages 407-414

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.07.147

Keywords

Anti-biofouling; Lotus effect; Block copolymer; Silver nanoparticle; Biomimetics

Funding

  1. Shanghai Talent Plan of Science and Technology [12XD1421300]
  2. Locality Development Project of Hainan University [HDSF201308]

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To develop an environmentally friendly anti-biofouling coating in virtue of bionics, a block copolymer containing fluorine (Coplm_F) of low surface energy was prepared by copolymerization. The Ag-loaded mesoporous silica (Ag@SBA) acting as a controlled-release antifoulant was prepared from the mesoporous silica (SBA-15). The nano hybrid coating (Ag@SBA/Coplin_F) composing of the Coplm_F and Ag@SBA was to biomimetically simulate the lotus microstructure. The concentration of fluorine element on surface was analyzed by the energy dispersive spectroscopy (EDS) and found rising to 1.45% after hybridation, which could be explained by the driving effect of SBA-15 via the hydrogen bond. This nanoscale morphology of the hybrid coating was measured and found highly semblable to the microstructure of the lotus surface. The contact angle was determined as 151 which confirmed the superhydrophobicity and lotus effect. The adhesion behaviors of Pseudomonas fluorescens, Diatoms, and Chlorella on the surface of the nano hybrid coating (Ag@SBA/Coplm_F) were studied and good effects of anti-biofouling were observed. (C) 2014 Elsevier B.V. All rights reserved.

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