Cao Mengting, Tang Mingwei, Lin Wensheng, Ding Zehao, Cai Shuang, Chen Hanxian, Zhang Xinxiang
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China.
Department of Chemical Engineering and Food Science, Hubei University of Arts and Science, 296 Longzhong Road, Xiangyang 441053, China.
Polymers (Basel). 2022 May 11;14(10):1953. doi: 10.3390/polym14101953.
Building superhydrophobic protective layers on the wood substrates is promising in terms of endowing them with multiple functions, including water-repellent, self-cleaning, anti-icing functions. In this study, multifunctional superhydrophobic wood was successfully fabricated by introducing SiO sol and superhydrophobic powder (PMHOS). The SiO sol was prepared using tetraethoxysilane as a precursor and ethanol was used as the dispersant. The PMHOS was synthesized using poly(methylhydrogen)siloxane (PMHS) and ethanol. As a result, the obtained superhydrophobic wood had a water contact angle (WCA) of 156° and a sliding angle (SA) of 6° at room temperature. The obtained superhydrophobic wood exhibited excellent repellency toward common liquid (milk, soy sauce, juice, and coffee). The superhydrophobic layer on the wood surface also exhibited good durability after a series of mechanical damages, including finger wiping, tape peeling, knife scratching, and sandpaper abrasion. In addition, the obtained superhydrophobic wood showed excellent anti-icing properties.
在木材基体上构建超疏水保护层有望赋予其多种功能，包括防水、自清洁、防冰功能。在本研究中，通过引入SiO溶胶和超疏水粉末（PMHOS）成功制备了多功能超疏水木材。SiO溶胶以四乙氧基硅烷为前驱体制备，乙醇用作分散剂。PMHOS由聚甲基氢硅氧烷（PMHS）和乙醇合成。结果，所制备的超疏水木材在室温下的水接触角（WCA）为156°，滑动角（SA）为6°。所制备的超疏水木材对常见液体（牛奶、酱油、果汁和咖啡）表现出优异的排斥性。木材表面的超疏水层在经过一系列机械损伤（包括手指擦拭、胶带剥离、刀划和砂纸打磨）后也表现出良好的耐久性。此外，所制备的超疏水木材还表现出优异的防冰性能。
