Nanohydrogel Brushes for Switchable Underwater Adhesion
Ma SH(麻拴红)1; Michele Scaraggi2,3; Lin P(林鹏)1; Yu B(于波)1; Wang DA(王道爱)1; Daniele Dini3; Zhou F(周峰)1; Zhou F(周峰)
刊名Journal of Physical Chemistry C
2017
卷号121期号:15页码:8452-8463
ISSN号1932-7447
通讯作者Daniele Dini ; 周峰
英文摘要

In nature, living systems commonly adopt the switchable friction/adhesion mechanism during locomotion. For example, geckos can move on ceilings, relying on the reversible attachment and detachment of their feet on substrate surfaces. Inspired by this scientists have used different materials to mimic natural dynamic friction/adhesion systems. However, synthetic systems usually cannot work in water environments and are also limited to single-contact interfaces, while nature has provided living systems with complex features to perform energy dissipation and adhere on multiple contact interfaces. Here, for the first time, we report the design, synthesis, and testing of a novel double-sided synthetic construct that relies on nanohydrogel brushes to provide simultaneous friction switching on each side of the membrane that separates the nanohydrogel fibers. This highly tunable response is linked to the swelling and shrinkage of the brushes in basic/acid media. Such a system shows three different friction states, which depend on the combination of pH control of the two membrane sides. Importantly, each side of the membrane can independently provide continuous but stable friction switching from high to ultralow friction coefficients in a wet environment under high load conditions. An in-depth theoretical study is performed to explore the mechanisms governing the hydration state responsible for the observed switching. This novel design opens a promising route for the development of new solutions for intelligent devices, which can adapt to multistimulus-responsive complex environments.

学科主题材料科学与物理化学
收录类别SCI
资助信息NSFC (20432009;51573199;51335010);D.D. acknowledges support of the Engineering and Physical Sciences Research Council (EPSRC) through the Platform grant EP/G026114/1 and his Established Career Fellowship EP/N025954/1
语种英语
WOS记录号WOS:000400039300024
内容类型期刊论文
源URL[http://210.77.64.217/handle/362003/22182]  
专题兰州化学物理研究所_固体润滑国家重点实验室
通讯作者Zhou F(周峰)
作者单位1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
2.Univ Salento, Dept Engn Innovat, I-73100 Monteroni Lecce, Italy
3.Imperial Coll London, Dept Mech Engn, South Kensington Campus,Exhibit Rd, London SW7 2AZ, England
推荐引用方式
GB/T 7714
Ma SH,Michele Scaraggi,Lin P,et al. Nanohydrogel Brushes for Switchable Underwater Adhesion[J]. Journal of Physical Chemistry C,2017,121(15):8452-8463.
APA Ma SH.,Michele Scaraggi.,Lin P.,Yu B.,Wang DA.,...&周峰.(2017).Nanohydrogel Brushes for Switchable Underwater Adhesion.Journal of Physical Chemistry C,121(15),8452-8463.
MLA Ma SH,et al."Nanohydrogel Brushes for Switchable Underwater Adhesion".Journal of Physical Chemistry C 121.15(2017):8452-8463.
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