Engineering Fully Organic and Biodegradable Superhydrophobic Materials
Engineering Fully Organic and Biodegradable Superhydrophobic Materials
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DOI：
10.1002/admi.201801202
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发表时间：
2018-10
影响因子：
5.4
通讯作者：
A. Milionis;C. Sharma;R. Hopf;M. Uggowitzer;Ilker S. Bayer;D. Poulikakos
中科院分区：
文献类型：
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作者：
A. Milionis;C. Sharma;R. Hopf;M. Uggowitzer;Ilker S. Bayer;D. Poulikakos
据报道，受荷叶等天然自洁植物的启发，开发了完全有机（纤维素/蜡基）、可生物降解和分层纹理的超疏水材料。所开发的材料可以以可控和人工的方式再现这些自然表面的化学成分和材料特性。同时，这里描述的制造协议通过允许轻松调整地形和机械特性，能够实现超越天然叶子的特性。据作者所知，表面形貌由微柱结构组件组成，具有迄今为止报道的纤维素材料的最高纵横比（7.6）。此外，还证明了材料机械性能的控制和可调性，通过添加甘油作为天然增塑剂，材料的机械性能变得更软（杨氏模量从 997 MPa 基础值降至 227 MPa）。最后，证明了自清洁性能，并在约 3 个月的时间内评估了材料的生物降解性，证实了材料的完全生物降解性。此外，水滴和喷射冲击以及折叠测试表明该材料可以合理地维持其润湿性能。这种真正受生物启发且可生物降解的材料系统可以在各种生物工程应用中找到潜在用途。
The development of fully organic (cellulose/wax based), biodegradable, and hierarchically textured superhydrophobic material, inspired by natural, self‐cleaning plants, like the Lotus leaf is reported. The developed material can reproduce in a controllable and artificial manner the chemical composition and material properties of these natural surfaces. At the same time, the fabrication protocol described here enables realization of properties beyond the ones found in the natural leaves, by allowing facile tuning of the topographical and mechanical properties. The surface topography consists of a micropillar structure assembly with, to the best of the authors' knowledge, the highest to date reported aspect ratio (7.6) for cellulose materials. Additionally, control and tunability of the material's mechanical properties are also demonstrated, which is rendered softer (down to 227 MPa Young's modulus from 997 MPa base value) by adding glycerol as a natural plasticizer. Finally, the self‐cleaning properties are demonstrated and the biodegradability of the material is evaluated in a period of ≈3 months, which confirms full biodegradation. Additionally, water drop and jet impact, and folding tests demonstrate that the material can reasonably sustain its wettability properties. Such a truly bioinspired and biodegradable material system could find potential use in various bioengineering applications.