Substrate-Independent, Transparent Oil-Repellent Coatings with Self-Healing and Persistent Easy-Sliding Oil Repellency.
Substrate-Independent, Transparent Oil-Repellent Coatings with Self-Healing and Persistent Easy-Sliding Oil Repellency.
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DOI：
10.1021/acsnano.5b06404
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发表时间：
2016-01
期刊：
影响因子：
17.1
通讯作者：
Li Yu;George Y. Chen;Haolan Xu;Xiaokong Liu
中科院分区：
文献类型：
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作者：
Li Yu;George Y. Chen;Haolan Xu;Xiaokong Liu
在此，我们报告了一种简单的和基底无关的方法来制备透明的拒油涂层，该方法涉及交替沉积聚（二烯丙基二甲基铵）（PDDA）和聚（苯乙烯磺酸盐）（PSS）到基材上，然后将涂覆的物体在全氟辛酸（PFO）水溶液中温育2分钟。对于10 μL液滴，张力液体可以容易地以小于12°的滑动角沿平坦基底上的涂层表面滑动。该涂料适用于硅、玻璃、塑料、钢铁、木材等各种形状复杂、表面积大的基材。它们也适用于具有微/纳米级和宏观尺度的粗糙度的粗糙基底，以实现易滑动的拒油性。将PDDA/PSS多层膜（PEMs）在PFO溶液中孵育诱导PFO阴离子有效但非破坏性地取代PEMs中的PSS，这导致具有均匀散布在涂层表面和本体中的PFO阴离子的复合涂层。由于所述涂层的“重复层”组成/结构，由于补充表面，它们的易滑动拒油性可以在表面分解后自愈合或在物理损坏后良好地保持。因此，所开发的防油涂层的有利特性和制备方案的简单性使得涂层对于现实世界的应用非常实用。据信，该涂料可用作防污涂料，其屏蔽油载污染物，化学屏蔽涂料，其保护涂覆的塑料不被有机溶剂溶解，和不粘涂料（油轮或管道的），其能够实现无损失的石油运输。
Herein we report a simple and substrate-independent approach to fabricate transparent oil-repellent coatings, which involves alternate deposition of poly(diallyldimethylammonium) (PDDA) and poly(styrenesulfonate) (PSS) onto substrates, followed by incubation of the coated objects into perfluorooctanoate (PFO) aqueous solutions for 2 min. Various low-surface-tension liquids can easily slide down the coating surfaces on flat substrates at a sliding angle lower than 12° for 10 μL droplets. The coatings are applicable to different substrates including Si, glass, plastic, steel, and wood, and those with complex shapes and large surface areas. They are also applicable to rough substrates with roughness at both micro/nanoscale and macroscopic scales to realize the easy-sliding oil repellency. Incubation of the PDDA/PSS polyelectrolyte multilayers (PEMs) into PFO solutions induces an effective but nondestructive substitution of PFO anions for PSS in the PEMs, which results in a composite coating with PFO anions homogeneously interspersed in both the coating surface and the bulk. Thanks to the as-described "repeating-layer" composition/structure of the coatings, their easy-sliding oil repellency can be self-healed after surface decomposition or well maintained after physical damages, due to the replenishing surface. Therefore, the advantageous characteristics of the as-developed oil-repellent coatings and the simplicity of the preparation protocol make the coatings highly practical for real-world applications. It is believed that the coatings can perform as antismudge coatings that shield against oil-borne contaminants, chemical-shield coatings that protect coated plastics from dissolution by organic solvents, and nonstick coatings (of oil tankers or pipelines) that enable loss-free oil transportation.