Topological and chemical investigation on super-hydrophobicity of PTFE surface caused by ion irradiation

Abstract Super-hydrophobic PTFE surfaces were obtained by irradiation of 200 keV Xe+ ion with the fluence of 6.2 × 1 0 13 ions/cm2. The contact angle of water on such surface is as large as 161 ± 3 ° . SEM and XPS were used to investigate how the topological and chemical changes affect the wettability of the irradiated surface. Needle like structures at nanometer scale caused by irradiation are considered to be the reason of the super-hydrophobicity. The formation of oxygen containing group and defluorination effect on the treated surface are inferred to have negative contribution to the hydrophobic optimization of PTFE surface.

[1]  S. Matsui,et al.  Surface modification of ptfe by synchrotron radiation under the O/sub 2/ gas atmosphere , 2005, Digest of Papers. 2004 International Microprocesses and Nanotechnology Conference, 2004..

[2]  R. Blossey.  Self-cleaning surfaces — virtual realities , 2003, Nature materials.

[3]  Tomohiro Onda,et al.  Super Water-Repellent Surfaces Resulting from Fractal Structure , 1996 .

[4]  Xiaogong Wang,et al.  Fabricating Super‐Hydrophobic Lotus‐Leaf‐Like Surfaces through Soft‐Lithographic Imprinting , 2006 .

[5]  I. Noh,et al.  Surface modification of a polytetrafluoroethylene film with cyclotron ion beams and its evaluation , 2007 .

[6]  Yasukiyo Ueda,et al.  The Lowest Surface Free Energy Based on −CF3 Alignment , 1999 .

[7]  T. Young.  III. An essay on the cohesion of fluids , 1805, Philosophical Transactions of the Royal Society of London.

[8]  Jin Zhai,et al.  Superhydrophobic Aligned Polystyrene Nanotube Films with High Adhesive Force , 2005 .

[9]  Jie-rong Chen,et al.  Studies on surface graft polymerization of acrylic acid onto PTFE film by remote argon plasma initiation , 2007 .

[10]  K. Tadanaga,et al.  Formation of Superhydrophobic-Superhydrophilic Pattern on Flowerlike Alumina Thin Film by the Sol-Gel Method , 2000 .

[11]  Tomohiro Onda,et al.  Super-Water-Repellent Fractal Surfaces , 1995 .

[12]  Xiaoji Zhang,et al.  Surface-restructuring behavior of aged PTFE irradiated by a high-flux nitrogen ion beam , 2004 .

[13]  G. Mesyats,et al.  Adhesion of Polytetrafluorethylene modified by an ion beam , 1999 .

[14]  Ikeda,et al.  Ultra-hydrophobic fluorine polymer by Ar-ion bombardment. , 2000, Colloids and surfaces. B, Biointerfaces.

[15]  Wei Chen,et al.  Ultrahydrophobic and Ultralyophobic Surfaces: Some Comments and Examples , 1999 .

[16]  O. Takai,et al.  Preparation of ultra water-repellent films by microwave plasma-enhanced CVD , 1997 .

[17]  J. Xue,et al.  Study on hydrophilicity of polymer surfaces improved by plasma treatment , 2006 .

[18]  A. Cassie,et al.  Wettability of porous surfaces , 1944 .

[19]  S. W. Lee,et al.  Surface modification and adhesion improvement of PTFE film by ion beam irradiation , 2004 .

[20]  H. Erbil,et al.  Transformation of a Simple Plastic into a Superhydrophobic Surface , 2003, Science.