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Open Access Nano Express

Well-ordered polymer nano-fibers with self-cleaning property by disturbing crystallization process

Qin Yang1, Zhuangzhu Luo1*, Sheng Tan1, Yimin Luo1, Yunjiao Wang1, Zhaozhu Zhang2 and Weimin Liu2

Author Affiliations

1 Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, People’s Republic of China

2 State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China

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Nanoscale Research Letters 2014, 9:352  doi:10.1186/1556-276X-9-352

Published: 15 July 2014

Abstract

Bionic self-cleaning surfaces with well-ordered polymer nano-fibers are firstly fabricated by disturbing crystallization during one-step coating-curing process. Orderly thin (100 nm) and long (5–10 μm) polymer nano-fibers with a certain direction are fabricated by external macroscopic force (Fblow) interference introduced by H2 gas flow, leading to superior superhydrophobicity with a water contact angle (WCA) of 170° and a water sliding angle (WSA) of 0-1°. In contrast, nano-wires and nano-bridges (1–8 μm in length/10-80 nm in width) are generated by “spinning/stretching” under internal microscopic force (FT) interference due to significant temperature difference in the non-uniform cooling medium. The findings provide a novel theoretical basis for controllable polymer “bionic lotus” surface and will further promote practical application in many engineering fields such as drag-reduction and anti-icing.

Keywords:
Polymer; Nano-fibers/spheres; Controllable; Superhydrophobicity; Disturbing crystallization