Fabrication of Superhydrophobic PDMS Surfaces by Combining Acidic Treatment and Perfluorinated Monolayers
Fabrication of Superhydrophobic PDMS Surfaces by Combining Acidic Treatment and Perfluorinated Monolayers
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DOI：
10.1021/la900064m
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发表时间：
2009-06-02
期刊：
影响因子：
3.9
通讯作者：
Guittard, Frederic
中科院分区：
文献类型：
--
作者：
de Givenchy, Elisabeth Patricia Taffin;Amigoni, Sonia;Guittard, Frederic
在本文中，通过酸腐蚀结合高度氟化单分子层的共价接枝，制备出了具有超疏水表面的聚二甲基硅氧烷（PDMS）。酸腐蚀使用硫酸（H₂SO₄）或氢氟酸（HF）进行，其中浓硫酸效果更佳。所得表面与水的接触角为135度。所有经酸处理的样品随后通过共价接枝三乙氧基氨丙基硅烷进行功能化，接着通过形成酰胺键与半氟化酰氯反应，或者直接使用市售的高度氟化硅烷——1H,1H,2H,2H - 全氟癸基三乙氧基硅烷，从而获得超疏水表面（与水的接触角超过160度）。在氟化单分子层中引入酰胺官能团可能由于表面接枝分子间氢键诱导的有序排列而提供了最佳的拒水性能。
In this paper, polydimethylsiloxane (PDMS) with a superhydrophobic surface was generated by the combination of an acid corrosion followed by the covalent grafting of a highly fluorinated monolayer. The acid corrosion was performed with H2SO4 or HF, and the more effective was concentrated H2SO4, The resulting surface had a contact angle with water of 135 degrees. All the acid-treated samples were then functionalized by the covalent grafting of triethoxyaminopropylsilane followed by the reaction with semifluorinated acid chlorides, via the formation of an amide bond, or directly by a commercially available highly fluorinated silane, 1H,1H,2H,2H-perfluorodecyltriethoxysilane, to afford superhydrophobic surfaces (contact angle with water exceeding 160 degrees). The introduction of an amide function in the fluorinated monolayer afforded the best water repellency properties probably due to the organization induced by H-bonding between the surface grafted molecules.