飞秒激光转写微结构制备特殊润湿性能表面
文献类型：学位论文
| 作者 | 李虹瑾 |
| 文献子类 | 硕士 |
| 导师 | 赵全忠 |
| 关键词 | 润湿性能' wettability 超疏水 superhydrophobic 粘滞力 adhesion 激光转写技术 laser-induced forward transfer 玫瑰“花瓣效应“ petal effect, femtosecond laser 飞秒激光 |
| 其他题名 | Fabrication of special wetting surfaces by femtosecond laser-induced forward transfer |
| 英文摘要 | 润湿性是固体材料重要的表面属性，它描述了固体与液体接触形成固-液-气界面时的行为。自然界许多植物以及动物的表面特殊结构和成分组成使得其具有“荷叶效应”、“花瓣效应”和毛细现象等一系列奇异的润湿性能。由于这些特殊润湿特性在“自清洁”、“微滴输运”等方面具有重要的潜在应用价值而引起广泛注意。超短脉冲激光由于具有脉宽窄、峰值功率高等特性，在微纳加工方面具有独特的优势。超短脉冲激光微纳加工成为一种实现对材料表面润湿性调控能的有效手段。超短脉冲激光转写是一种利用激光实现靶材料从源基底板向目标基底板转写的技术，它能够在不影响材料本身属性的前提下，选择性地对材料表面同时进行成分和结构的精细修饰，具有快速、便捷、无污染、应用广泛等特性。 本文利用飞秒激光转写技术实现三维空间选择性地对玻片表面进行成分与结构的改性，使得其润湿性能由亲水转变为特殊超疏水——高接触角和高粘滞力，使得玻片表面呈现“玫瑰花瓣”效应；并通过改变加工的路径，实现对结构的调制，从而进一步实现对材料表面润湿性能的调控，并利用Cassie impregnating模型探讨了玫瑰“花瓣”效应形成的机理。利用激光转写技术实现对润湿性能调控还未见研究报道。结合描述润湿性能重要参数接触角和粘滞力的模型，我们深入探讨了润湿性能背后的对应润湿状态，分析了粘滞力和润湿行为的相互关系。; Wettability, as one of the key characteristics of material surface, describes the behavior of interfaces between solid-liquid-gas. Functional surfaces with special wettability have gained great attention due to their potential applications in industry and research. Inspired by the special wettability in nature, such as “petal effect”, “lotus effect ” and capillary phenomenon, researchers has utilized different methods to realize biomimetic surface modification with hierarchical structures. Ultrafast laser has superior advantages in surface modification owe to its ultra-narrow pulse-width and ultra-high peak power density, making it an efficient technique to realize modification of wettability. Laser-induced forward transfer (LIFT) is a method for transferring materials from the source substrate to the surface of the receiving substrate. Fabrication of modified surfacesby LIFT has the advantages of cleanliness, celerity and simplicity, which means that LIFT can realize the controlled modification of a variety of surfaces without influence on the underlying materials.To the best of our knowledge, this is the first time to report on controlling the wettability of surfaces by LIFT . In this thesis, superhydrophobic adhesive glass surfaces with polystyrene has been obtained via femtosecond LIFT. Using this facile method, we obtained composite hierarchic structures with array of stripes composed of micro-protrusions covered with nano-papillae on the glass surface, achieving the transformation from hydrophilicity to superhydrophobicity with contact angle from 36.22° on the glass surface to 159.19° on the LIFT modified glass surface. Analogous to the “petal effect”, the obtained superhydrophobic surface also shows high adhesion. Furthermore, the wettability of LIFT modified glass surface can be tuned by changing the interval width of laser scanning, which can be explained by the Cassie impregnating wetting model. |
| 学科主题 | 光学工程 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/31018]  |
| 专题 | 中国科学院上海光学精密机械研究所 |
| 作者单位 | 中国科学院上海光学精密机械研究所 |
| 推荐引用方式 GB/T 7714 | 李虹瑾. 飞秒激光转写微结构制备特殊润湿性能表面[D]. |
入库方式： OAI收割
来源：上海光学精密机械研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。