Ou Junfei, Zhao Guoqing, Wang Fajun, Li Wen, Lei Sheng, Fang Xinzuo, Siddiqui Abdul Rahim, Xia Yongmei, Amirfazli Alidad
School of Materials Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
Department of Mechanical Engineering, York University, Toronto, Ontario M3J 1P3, Canada.
ACS Omega. 2021 Mar 11;6(11):7266-7274. doi: 10.1021/acsomega.0c04099. eCollection 2021 Mar 23.
A superhydrophobic coating endows pristine hydrophilic wood with excellent water/moisture repellency and thus prolongs its service life. Generally, the superhydrophobic coating on wood is fabricated by a two-step process in which the nanoparticles are first introduced onto the surface and then modified by low-surface-energy molecules. Herein, for the first time, we have fabricated the superhydrophobic wood via a one-step process free of nanoparticles by immersing the pristine hydrophilic wood, such as pine, balsawood, and basswood, into a composite silane solution of hexadecyltrimethoxysilane and methyltrimethoxysilane. The wood remains superhydrophobic or highly hydrophobic after long-term exposure to mechanical damage (such as abrading, knife-cutting, and tape-peeling), chemical damage (such as immersion in acid, alkali, or ethanol), and environmental impacting (such as UV irradiation and low/high-temperature exposure).
超疏水涂层赋予原始亲水木材优异的防水/防潮性能，从而延长其使用寿命。通常，木材上的超疏水涂层是通过两步法制备的，其中首先将纳米颗粒引入到表面，然后用低表面能分子进行改性。在此，我们首次通过一步法制备了不含纳米颗粒的超疏水木材，即将原始亲水木材（如松木、轻木和椴木）浸入十六烷基三甲氧基硅烷和甲基三甲氧基硅烷的复合硅烷溶液中。经过长期的机械损伤（如磨损、刀切和胶带剥离）、化学损伤（如浸入酸、碱或乙醇中）以及环境影响（如紫外线照射和低/高温暴露）后，木材仍保持超疏水或高疏水性。
