Selim Mohamed S, Yang Hui, Wang Feng Q, Li Xue, Huang Yong, Fatthallah Nesreen A
Technical Institute of Physics and Chemistry, Chinese Academy of Science 29 Zhongguancun East Road, Haidian District Beijing 100190 China
Petroleum Application Department, Egyptian Petroleum Research Institute Nasr City 11727 Cairo Egypt.
RSC Adv. 2018 Mar 8;8(18):9910-9921. doi: 10.1039/c8ra00351c. eCollection 2018 Mar 5.
The effects of Ag@SiO core-shell nanofiller dispersion and micro-nano binary structure on the self-cleaning and fouling release (FR) in the modelled silicone nano-paints were studied. An ultrahydrophobic polydimethylsiloxane/Ag@SiO core-shell nanocomposite was prepared as an antifouling coating material. Ag@SiO core-shell nanospheres with 60 nm average size and a preferential {111} growth direction were prepared a facile solvothermal and a modified Stöber methods with a controlled shell thickness. Ag@SiO core-shell nanofillers were inserted in the silicone composite surface solution casting technique. A simple hydrosilation curing mechanism was used to cure the surface coating. Different concentrations of nanofillers were incorporated in the PDMS matrix for studying the structure-property relationship. Water contact angle (WCA) and surface free energy determinations as well as atomic force microscopy and scanning electron microscope were used to investigate the surface self-cleaning properties of the nanocomposites. Mechanical and physical properties were assessed as durability parameters. A comparable study was carried out between silicone/spherical Ag@SiO core-shell nanocomposites and other commercial FR coatings. Selected micro-foulants were used for biological and antifouling assessments up to 28 days. Well-distributed Ag@SiO core-shell (0.5 wt%) exhibited the preferable self-cleaning with WCA of 156° and surface free energy of 11.15 mN m.
研究了Ag@SiO核壳纳米填料分散体和微纳二元结构对模拟有机硅纳米涂料自清洁和防污释放（FR）性能的影响。制备了一种超疏水聚二甲基硅氧烷/Ag@SiO核壳纳米复合材料作为防污涂层材料。采用简便的溶剂热法和改进的Stöber法，通过控制壳层厚度制备了平均尺寸为60 nm、具有优先{111}生长方向的Ag@SiO核壳纳米球。采用溶液浇铸技术将Ag@SiO核壳纳米填料引入有机硅复合材料表面。采用简单的硅氢加成固化机理对表面涂层进行固化。在聚二甲基硅氧烷（PDMS）基体中加入不同浓度的纳米填料，以研究结构-性能关系。通过测定水接触角（WCA）和表面自由能，以及利用原子力显微镜和扫描电子显微镜来研究纳米复合材料的表面自清洁性能。将机械性能和物理性能作为耐久性参数进行评估。对有机硅/球形Ag@SiO核壳纳米复合材料与其他商用FR涂料进行了对比研究。选用了一些微污损生物进行长达28天的生物和防污评估。分布均匀的Ag@SiO核壳（0.5 wt%）表现出较好的自清洁性能，水接触角为156°，表面自由能为11.15 mN/m。
