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Issue 12, 2010
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Thermal-responsive hydrogel surface: tunable wettability and adhesion to oil at the water/solid interface

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Abstract

We present a thermal-responsive poly(N-isopropylacrylamide) (PNIPAM) hydrogel, which can responsively and reversibly control the wettability and adhesion to oil at water/solid interface. The hydrogel surface can switch from a superoleophobic and low adhesive state below the PNIPAM lower critical solution temperature (LCST, ∼32 °C) to an oleophobic and high adhesive state above its LCST. Moreover, the thermal-responsive wettability and adhesion to oil at the water/solid interface can be tailored by designing and constructing ordered micro-structures on the surface. We demonstrated the thermal-responsive changing of the topography on PNIPAM hydrogel surface by atomic force microscopy and proposed a mechanism of inter-molecular to intra-molecular hydrogen binding transitions. We believe the reported material has promising utilizations in micro fluidics, control of bio-relevant adhesion and under-water antifouling materials.

Graphical abstract: Thermal-responsive hydrogel surface: tunable wettability and adhesion to oil at the water/solid interface

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Publication details

The article was received on 05 Feb 2010, accepted on 17 Mar 2010 and first published on 07 May 2010


Article type: Paper
DOI: 10.1039/C002543G
Citation: Soft Matter, 2010,6, 2708-2712

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    Thermal-responsive hydrogel surface: tunable wettability and adhesion to oil at the water/solid interface

    L. Chen, M. Liu, L. Lin, T. Zhang, J. Ma, Y. Song and L. Jiang, Soft Matter, 2010, 6, 2708
    DOI: 10.1039/C002543G

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