文献类型：期刊文献

英文题名：Construction of a Superhydrophobic Wood Surface Coating by Layer-by-Layer Assembly: Self-Adhesive Properties of Polydopamine

作者：Shao, Chuang[1,2] Jiang, Mingliang[1] Zhang, Jingpeng[1,2] Zhang, Qingshuo[1] Han, Liping[1] Wu, Yuzhang[2]

第一作者：Shao, Chuang

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China; [2] Research Institute of Forestry New Technology, Chinese Academy of Forestry, Beijing, 100091, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220310385)

语种：英文

外文关键词：Adhesives - Alkalinity - Biodegradation - Coatings - Contact angle - Crosslinking - Energy dispersive spectroscopy - Hydrophobicity - Particle size analysis - Surface roughness - Wood products

摘要：To prevent moisture deformation, water swelling, severe mildewing, and decay due to the biodegradation of wood during outdoor use, a superhydrophobic wood surface coating was prepared by a layer-by-layer assembly method using polydopamine (PDA) and 1H,1H,2H,2H- perfluoro-decyl trichlorosilane (PFDTS). Due to its self-adhesive properties, PDA was used as an intermediate layer to connect the wood and PFDTS. PDA was first deposited on the wood surface to form a highly crosslinked granular structure that improved the surface roughness of wood. The wood surface was further modified by low-surface-energy PFDTS, and the wood after PDA deposition was superhydrophobic with a water contact angle (WCA) of 154°. The particle size of nano-PDA, as measured by laser particle size analysis, remained in the range of 0.57–2.73 μm. The surface morphologies of PFDTS/PDA coatings on glass plates were detected by EDF 3D microscopy, FE-SEM, and AFM. The bonding mechanism between coating components and wood surfaces was investigated by energy-dispersive spectroscopy, FT-IR spectroscopy, and XPS. The hydrophobic coating underwent rapid restored and was resistant to both acidic and alkaline solutions (pH 2–12). This work provides a simple way to endow superhydrophobic properties to wood and has potential multifunctional applications for wood protection and new products. ? 2022, The Authors. All rights reserved.