近期Applied Materials and Interfaces报道了莱斯大学科研人员发明的一种不含氟的新型超疏水涂料，通过更加环保的低表面能烷基支链羧酸材料(LSEM)修饰氧化铝纳米颗粒获得具有强疏水能力的涂层材料（水接触角达到155度），材料制备原理如下图：
据作者介绍，这种涂层材料与含氟疏水涂料相比，具有更好的耐用性，而且更加环保。参考文献：Branched Hydrocarbon Low Surface Energy Materials (LSEMs) for Superhydrophobic Nanoparticle Derived Surfaces，Shirin Alexander, Julian Eastoe, Alex M. Lord, Frederic Guittard, and Andrew R Barron，ACS Appl. Mater. Interfaces, DOI: 10.1021/acsami.5b09784
We present a new class of superhydrophobic surfaces created from low-cost and easily synthesized aluminum oxide nanoparticles functionalized carboxylic acids having highly branched hydrocarbon (HC) chains. These branched chains are new low surface energy materials (LSEMs) which can replace environmentally hazardous and expensive fluorocarbons (FCs). Regardless of coating method and curing temperature, the resulting textured surfaces develop water contact angles (θ) of ~155° and root-mean-square roughnesses (Rq) ≈ 85 nm, being comparable with equivalent FC functionalized surfaces (θ = 157º and Rq = 100 nm). The functionalized nanoparticles may be coated onto a variety of substrates to generate different superhydrophobic materials.