Mosquito’s Compound Eyes as Inspiration for Fabrication of Conductive Superhydrophobic Nanocarbon Materials from Waste Wheat Straw

作者：Yanbin Wang, Dong Zhang, June Deng, Feng Zhou, Zhiying Duan, Qiong Su, Shaofeng Pang · 发表于：ACS Sustainable Chemistry & Engineering · 年份：2019 · DOI：10.1021/acssuschemeng.8b04906 · 被引用次数：39 · 研究领域：Surface Modification and Superhydrophobicity、Electrospun Nanofibers in Biomedical Applications、Supercapacitor Materials and Fabrication

Converting waste wheat straw to conductive superhydrophobic nanocarbon materials is inspired by mosquito’s compound eyes, and a one step pyrolysis process is used for controllable construction of micro/nanohierarchical structures. Their structures and hydrophobicity can be tuned efficiently by the annealing temperature. Scanning electron microscopy, elemental analysis, X-ray diffraction, laser Raman, Fourier transform infrared, and photoelectron spectroscopy analyses were used to reveal the structure of electrical conductive carbon materials (ECMs) and a possible mechanism of the nanostructures formation. These results indicate that there are big differences between the surface and the inner structure for the nanocarbon materials, and the releasing rates of a multicomponent gas at different annealing temperatures by further decomposition of waste wheat straw should be pivotal to the formation of nanostructures. There is also cause for superhydrophobicity and electroconductivity for the ECM-800. Considering the potential use of the novel ECM-800, a low-cost, green, sustainable, conductive, and superhydrophobic coating strategy was developed by dip-coating of the different substrates with a ECM-800/PDMS mixture, followed by thermal curing. The water contact angle of the prepared ECM-800/PDMS coating is greater than 160°, while the sliding angle is less than 5°, showing excellent superhydrophobicity as well as good mechanical robustness and water-repellency in the artificial rai...