Omniphobic "RF Paper" Produced by Silanization of Paper with Fluoroalkyltrichlorosilanes
Omniphobic "RF Paper" Produced by Silanization of Paper with Fluoroalkyltrichlorosilanes
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DOI：
10.1002/adfm.201300780
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发表时间：
2014-01-01
影响因子：
19
通讯作者：
Whitesides, George M.
中科院分区：
文献类型：
--
作者：
Glavan, Ana C.;Martinez, Ramses V.;Whitesides, George M.
本文报道了用氟烷基三氯硅烷对纸进行气相硅烷化制备“氟烷基纸”(“R-F纸”)的方法。R-F纸既疏水又憎油：它排斥水((H)(APP)2(O)>；140度)、表面张力低至28MN m(-1)的有机液体、含有离子和非离子表面活性剂的水溶液，以及血液等复杂液体(包含盐、表面活性剂和细胞、蛋白质和脂等生物材料)。纸张抵抗具有较大表面张力的液体润湿的倾向与有机硅烷的长度和氟化程度(甲基三氯硅烷处理的纸张除外)以及纸张的粗糙度相关。R-F纸保持了未经处理的纸对气体的高渗透性和机械灵活性，并可以折叠成功能形状(例如，微滴定板和充液气体传感器)。当浸渍全氟油时，R-F纸形成“光滑”表面(纸张光滑的多孔液体注入表面，或“纸条”)，能够排斥表面张力低至15mN m(-1)的液体。纸条的可折叠性允许制造通道和流量开关来引导液滴的运输。
The fabrication and properties of "fluoroalkylated paper" ("R-F paper") by vapor-phase silanization of paper with fluoroalkyl trichlorosilanes is reported. R-F paper is both hydrophobic and oleophobic: it repels water ((H)(app)2(O)>140 degrees), organic liquids with surface tensions as low as 28mN m(-1), aqueous solutions containing ionic and non-ionic surfactants, and complex liquids such as blood (which contains salts, surfactants, and biological material such as cells, proteins, and lipids). The propensity of the paper to resist wetting by liquids with a wide range of surface tensions correlates with the length and degree of fluorination of the organosilane (with a few exceptions in the case of methyl trichlorosilane-treated paper), and with the roughness of the paper. R-F paper maintains the high permeability to gases and mechanical flexibility of the untreated paper, and can be folded into functional shapes (e.g., microtiter plates and liquid-filled gas sensors). When impregnated with a perfluorinated oil, R-F paper forms a "slippery" surface (paper slippery liquid-infused porous surface, or "paper SLIPS") capable of repelling liquids with surface tensions as low as 15 mN m(-1). The foldability of the paper SLIPS allows the fabrication of channels and flow switches to guide the transport of liquid droplets.