首页>>文献首页>>文献正文

Bioinspired self-repairing slippery surfaces with pressure-stable omniphobicity

renchunxiao 添加于 2011/9/26 15:55:00  5613次阅读 | 1次推荐 | 1个评论

Creating a robust synthetic surface that repels various liquids would have broad technological implications for areas ranging from biomedical devices and fuel transport to architecture but has proved extremely challenging1. Inspirations from natural nonwetting structures2, 3, 4, 5, 6, particularly the leaves of the lotus, have led to the development of liquid-repellent microtextured surfaces that rely on the formation of a stable air–liquid interface7, 8, 9. Despite over a decade of intense research, these surfaces are, however, still plagued with problems that restrict their practical applications: limited oleophobicity with high contact angle hysteresis9, failure under pressure10, 11, 12 and upon physical damage1, 7, 11, inability to self-heal and high production cost1, 11. To address these challenges, here we report a strategy to create self-healing, slippery liquid-infused porous surface(s) (SLIPS) with exceptional liquid- and ice-repellency, pressure stability and enhanced optical transparency. Our approach—inspired by Nepenthes pitcher plants13—is conceptually different from the lotus effect, because we use nano/microstructured substrates to lock in place the infused lubricating fluid. We define the requirements for which the lubricant forms a stable, defect-free and inert ‘slippery’ interface. This surface outperforms its natural counterparts2, 3, 4, 5, 6 and state-of-the-art synthetic liquid-repellent surfaces8, 9, 14, 15, 16 in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low contact angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1–1 s), resist ice adhesion, and function at high pressures (up to about 680 atm). We show that these properties are insensitive to the precise geometry of the underlying substrate, making our approach applicable to various inexpensive, low-surface-energy structured materials (such as porous Teflon membrane). We envision that these slippery surfaces will be useful in fluid handling and transportation, optical sensing, medicine, and as self-cleaning and anti-fouling materials operating in extreme environments.

作 者:Tak-Sing Wong; Sung Hoon Kang; Sindy K. Y. Tang; Elizabeth J. Smythe; Benjamin D. Hatton; Alison Grinthal; Joanna Aizenberg
期刊名称: Nature
期卷页: 2011-09-21 第477卷 第7365期 443~447页
学科领域:工程材料 » 无机非金属材料 » 玻璃材料
添加人是否为作者:
原文链接:http://www.nature.com/nature/journal/v477/n7365/full/nature10447.html
DOI: doi:10.1038/nature10447
ISBN: 0028-0836
关键词: Methods, Materials, Materials science, Physics
备 注:
来自论坛的回复:
文献笔记

   
导出选项:

评论 (1 个评论)

发表评论人: [2011/9/27 10:34:58] 
学科领域怎么会事玻璃材料呢?
Page 1 of 1
<<<[1]>>>

举报 | Archiver | 科学网( 京ICP备07017567 )

GMT+8, 2011-2-15 11:31

Powered by ScienceNet.cn

Copyright © 2007- 科学时报社