Bioinspired Superhydrophobic Surface Constructed from Hydrophilic Building Blocks: A Case Study of Core–Shell Polypyrrole-Coated Copper Nanoneedles

Coatings

Ben Wang¹  Jiareng Chen²  Pengfei Yin²  Bin Cui²  Yang Liu²  Xinyu Zhang³  Li Zhang⁴  Jianming Chen⁵  Yuanfeng Wang⁵  JohnH. Xin⁵ 

[1] College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China;Department of Biomedical Engineering, Sun Yat-sen University, Guangzhou 510006, China;Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA;Department of Mechanical and Automation Engineering, Chinese University of Hong Kong, Hong Kong 999077, China;Institute of Textiles and Clothing, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 999077, China;

关键词: bioinspired;    superhydrophobic surface;    hydrophilic;    polypyrrole;    copper;    nanoneedle;   

DOI  :  10.3390/coatings10040347

来源: DOAJ

【 摘 要 】

Hydrophilic polypyrrole-coated copper nanoneedles (PPy-CuNDs) were synthesized and utilized to construct a superhydrophobic surface on a polyethylene terephthalate fabric (PET) by using the spray-coating technique. The morphology of the as-synthesized PPy-CuNDs can be facilely tuned by changing the concentration of the reducing agent: hydrazine monohydrate. The CuNDs with well-defined nanocrystalline structures and nanoscale thick, rough PPy coating layers were formed simultaneously in one pot. The PPy-CuNDs self-assembled into an entangled, stacking nanocarpet on the surface of the PET fabric, and they eventually formed a reentrant surface texture similar to that of chrysanthemum leaves. The PPy-CuND-PET surface initially showed good superhydrophobic properties, but a fast transition from the superhydrophobic state to the highly adhesive state was observed. The underlying mechanism of this transition and its potential applications were proposed in the context.

【 授权许可】

Unknown