J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (1): 20-26.

• Nanomaterialsand Nanotechnology • Previous Articles     Next Articles

Preparation of Large Area Double-walled Carbon Nanotube Macro-films with Self-cleaning Properties

Ziping Wu, Qianfeng Xu, Jiannong Wang,  Jie Ma   

  1. 1) School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2) Shanghai Key Laboratory for Metallic Functional Materials, Key Laboratory for Advanced Civil Engineering Materials (Ministry of Education), School of Materials Science and Engineering, Tongji University, Shanghai 200029, China
  • Received:2009-06-15 Revised:2009-10-19 Online:2010-01-31 Published:2010-01-22
  • Contact: Jian Nong Wang
  • Supported by:

    the National Natural Science Foundation of China (No. 50871067)
    the National 863 Project (No. 2007AA05Z128) from the Ministry of Science and Technology of China

Abstract:

Double-walled carbon nanotube (DWCNT) macro-films with large areas, excellent flexibility and superhy-drophobicity are reported. The area of the macro-film is larger than 30 cm×15 cm, and this large film can be bended, or folded without any damage, and even can be tailored freely. After a simple modification of perfluoroalkysilane, the surface of the macro-film shows excellent superhydrophobicity with a water contact angle of 165.7±2 deg. and sliding angle lower than 3 deg., the prepared superhydrophobic films showing excellent antifouling, self-cleaning and water-repellent functions. The topographic roughness and per°uoroalkysilane modification are found to contribute to the observed superhydrophobicity. Considering the outstanding electronic, chemical and mechanical properties of DWCNTs, it is expected that this multifunctional DWCNT macro-film has potential applications in many fields.

Key words: Double-walled carbon nanotubes, Large area film, Self-cleaning, Methanol