Stable superhydrophobic wood surface constracting by KH580 and nano-Al2O3 on polydopamine coating with two process methods
Stable superhydrophobic wood surface constracting by KH580 and nano-Al2O3 on polydopamine coating with two process methods
复制标题
两种工艺方法在聚多巴胺涂层上KH580和纳米Al2O3构建稳定的超疏水木材表面
DOI：
10.1016/j.colsurfa.2021.128219
复制
发表时间：
2022-01-10
影响因子：
5.2
通讯作者：
Qin, Zhiyong
中科院分区：
文献类型：
--
作者：
Yang, Jisheng;Li, Han;Qin, Zhiyong
木材的超疏水处理对于提高木材的使用寿命、拓展其应用领域具有重要意义。本研究设计了两种工艺方法来满足上述要求。以聚多巴胺（PDA）、3-巯丙基三乙氧基硅烷（KH 580）和纳米Al 2 O3为微纳米结构标记剂，十八烷基三氯硅烷（OTS）为低表面自由能改性剂，对粗糙表面进行改性，制备超疏水木材样品（Wood@One-step和Wood@Two-step）。Wood@One-step的接触角（CA）和滑动角（SA）分别为155.3度和4.76度; Wood@Two-step的CA和SA分别为152.9度和7.65度。表面电子显微镜（SEM）图像显示，Wood@One-step和Wood@Two-step表面分别为蜂窝状结构和层状堆积结构。Wood@One-step的超疏水性能上级，因为其具有更合理的微纳米粗糙度。原子力显微镜（AFM）图像显示，纳米Al 2 O3颗粒可以有效地提供纳米级的粗糙度。X射线光电子能谱（XPS）分析表明，KH 580与PDA之间存在共价键作用。热重（TG）分析、酸碱溶液和有机溶液浸泡实验表明，所制备的超疏水木材样品在环境挑战面前具有优异的稳定性。
Superhydrophobic treatment of wood is of great significance for improving the service life of wood and expanding its application fields. In this study, two process methods were designed to meet above requirements. Using polydopamine (PDA), 3-mercaptopropyltriethoxysilane (KH580) and nano-Al2O3 as the micro-nano structure maker and octadecyltrichlorosilane (OTS) as a low surface free energy agent to modify rough surface in order to prepare superhydrophobic wood samples (Wood@One-step and Wood@Two-step). The contact angle (CA) and sliding angle (SA) of the Wood@One-step were 155.3 degrees and 4.76 degrees, respectively; the CA and SA of the Wood@Two-step were 152.9 degrees and 7.65 degrees, respectively. Surface electron microscopy (SEM) images showed that the surface of Wood@One-step and Wood@Two-step were honeycomb structure and layered stacking structure respectively. The superhydrophobic properties of Wood@One-step were superior because of its more reasonable micro-nano roughness. Atomic force microscope (AFM) images presented that the nano-Al2O3 particles could effectively provide nano-level roughness. X-ray photoelectron spectroscopy (XPS) analysis showed that KH580 had covalent interaction with PDA. Thermogravimetric (TG) analysis, the immersion of acid-base solution and organic solution revealed that obtained superhydrophobic wood samples had excellent stability in the face of environmental challenges.