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Molding processed multi-layered and multi-functional nanocomposites with high structural ability, electrical conductivity and durable superhydrophobicity

Abstract

Bioinspired superhydrophobic surfaces mainly attributed to the nano/micro textures and low surface energy materials, have exciting potential usage in fields such as self-cleaning, water-proofing, anti-icing, anti-fouling, etc. However, natural weakness of such delicate hierarchical surface structures always poses great challenges to those artificial superhydrophobic surfaces under harsh mechanical conditions. Transforming multi-layered composite materials with good structural ability entirely into superhydrophobic status would extremely extend its durability under continuous mechanical abrasion. Endowing electrical conductivity to these composites would further expand their application scope especially in anti-static environment. Here we employ a facile molding process to fabricate a new type of multi-layered and multi-functional nanocomposites (MMNCs), with tensile strength up to ~226.4 MPa and modulus to ~24.8 GPa, surface electric conductivity of ~1.2 S/cm, water contact angle of ~155.4° and water sliding angle of ~2.0°. These MMNCs demonstrate robust water-repellency under harsh mechanical abrasion (tested using high sticky tape peel, cyclic sand paper abrasion and even file abrasion) and strong chemical corrosion (tested by hydrochloric acid, sulfuric acid and sodium hydroxide solutions). Additionally, our MMNCs possess high water impalement resistance (tested by turbulent water jet impact with velocity up to ~29.5 m/s and corresponding Weber number of ~32,000). With multifaceted robustness of superhydrophobicity, as well as excellent structural performance and conductivity, these MMNCs should find potential usage in vehicle, container, wind blade, infrastructure and electronics etc., which usually suffer comprehensive harsh conditions like rainfall, abrasion, static electricity and high loads etc.

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Publication details

The article was received on 28 May 2018, accepted on 08 Oct 2018 and first published on 09 Oct 2018


Article type: Paper
DOI: 10.1039/C8NR04317E
Citation: Nanoscale, 2018, Accepted Manuscript
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    Molding processed multi-layered and multi-functional nanocomposites with high structural ability, electrical conductivity and durable superhydrophobicity

    B. Wu, C. Peng, Y. Hu, J. Yang, S. Xing, D. Jiang, J. Lyu and Y. He, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR04317E

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