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Position: Home > Articles > 基于纳米压印技术的遗态仿生设计各向异性超疏水木材 Journal of Fujian Agriculture and Forestry University(Natural Science Edition) 2021 (1) 134-139

基于纳米压印技术的遗态仿生设计各向异性超疏水木材

作者：

杨玉山;沈华杰;邱坚

单位：

西南林业大学材料科学与工程学院

关键词：

白蜡木;遗态仿生;纳米压印;茭草叶;多尺度微纳米结构;各向异性超疏水;

摘要：

采用纳米压印技术与硅烷化接枝改性处理相结合的方法,将遗态材料茭草叶表面的微纳米槽棱构筑于木材表面,得到遗态仿生各项异性超疏水木材.通过SEM、EDS、XRD、FTIR以及WCA对试样的微观形貌、化学元素组成、表面化学状态以及润湿性进行表征.结果表明:遗态仿生各向异性超疏水木材表面具有与茭草叶类似的微观形貌;其水接触角为158°,表现出超疏水性能;此外,其表面的水滴在翻转至垂槽方向时,水滴粘附在试样表面没有滴落,而平槽方向上水滴迅速滚落,表现各项异性.同时,经不同温度蒸煮处理后对其稳定超疏水性进行了测试,结果表明其水接触角均大于150°,仍具有超疏水特性,制备的超疏水木材表面具有耐久性与耐候性.

作者：

YANG Yushan;SHEN Huajie;QIU Jian;College of Materials Science and Engineering,Southwest Forestry University;

关键词：

ash wood;;morph-genetic process;;nanoimprint lithography;;Zizania leaf;;multi-scale micro/nanostructure;;anisotropic superhydrophobicity

摘要：

A combination of nanoimprint lithography and silane grafting modification was used to transfer the micro-and nano-slotted ribs locating on the surface of Zizania leaves onto wood surface, in order to create a biomimetic wood material with anisotropic superhydrophobicity. The microstructure, chemical element composition, surface chemistry and wettability of the specimen were characterized by scanning electron microscope, energy dispersive spectrometer, X-ray diffraction, Fourier transform infrared spectroscopy and water contact angle. The results showed that the microscopic surface of the wood specimens resembled that of Zizania leaf. The water contact angle of the modified wood specimens was 158°, showing superhydrophobic property. When flipping in the vertical groove direction, water droplets did not disperse or stick to the wood surface. Instead, they rolled down quickly in the flat groove direction on the specimen surface, showing good anisotropy performance. The stability of the superhydrophobicity was further tested by sandpaper abrasion test and different temperatures of boiling treatment. After the tests, the water contact angles still exceeded 150°, implying that the superhydrophobic property was still maintained. Therefore, the modified superhydrophobic wood surface also has durability and weather resistance.

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基于纳米压印技术的遗态仿生设计各向异性超疏水木材

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