College of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China.
Key Lab of Guangdong Province for High Property and Functional Polymer Materials , Guangzhou 510640 , China.
ACS Appl Mater Interfaces. 2018 Mar 28;10(12):10587-10597. doi: 10.1021/acsami.8b01382. Epub 2018 Mar 16.
Superhydrophobic materials integrating stretchability with conductivity have huge potential in the emerging application horizons such as wearable electronic sensors, flexible power storage apparatus, and corrosion-resistant circuits. Herein, a facile spraying method is reported to fabricate a durable superhydrophobic coating with excellent stretchable and electrical performance by combing 1-octadecanethiol-modified silver nanoparticles (M-AgNPs) with polystyrene- b-poly(ethylene- co-butylene)- b-polystyrene (SEBS) on a prestretched natural rubber (NR) substrate. The embedding of M-AgNPs in elastic SEBS matrix and relaxation of prestretched NR substrate construct hierarchical rough architecture and endow the coating with dense charge-transport pathways. The fabricated coating exhibits superhydrophobicity with water contact angle larger than 160° and a high conductivity with resistance of about 10 Ω. The coating not only maintains superhydrophobicity at low/high stretch ratio for the newly generated small/large protuberances but also responds to stretching and bending with good sensitivity, broad sensing range, and stable response cycles. Moreover, the coating exhibits excellent durability to heat and strong acid/alkali and mechanical forces including droplet impact, kneading, torsion, and repetitive stretching-relaxation. The findings conceivably stand out as a new tool to fabricate multifunctional superhydrophobic materials with excellent stretchability and conductivity for flexible electronics under wet or corrosive environments.
超疏水材料将可拉伸性与导电性结合在一起，在可穿戴电子传感器、柔性储能装置和耐腐蚀电路等新兴应用领域具有巨大的潜力。在此，通过在预拉伸天然橡胶 (NR) 基底上结合 1-十八硫醇修饰的银纳米粒子 (M-AgNPs) 和聚苯乙烯- b-聚(乙烯-共-丁烯)- b-聚苯乙烯 (SEBS)，报道了一种简便的喷涂方法来制备具有出色拉伸性能和电性能的耐用超疏水涂层。M-AgNPs 嵌入弹性 SEBS 基质中，以及预拉伸 NR 基底的松弛，构建了分层粗糙结构，并赋予涂层密集的电荷传输途径。所制备的涂层表现出超疏水性，水接触角大于 160°，且具有约 10 Ω 的高导电性。该涂层不仅在低/高拉伸比下对新生成的小/大突起保持超疏水性，而且对拉伸和弯曲具有良好的灵敏度、宽传感范围和稳定的响应循环。此外，该涂层表现出优异的耐热性、耐强酸/强碱和机械力（包括液滴冲击、揉捏、扭转和重复拉伸-松弛）耐久性。这些发现无疑为在潮湿或腐蚀性环境下制造具有出色拉伸性和导电性的多功能超疏水材料提供了一种新工具，用于柔性电子。
