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首页> 外文期刊>Journal of porous materials >Synthesis of superhydrophobic core-shell mesoporous silica nanoparticles
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Synthesis of superhydrophobic core-shell mesoporous silica nanoparticles

机译:超疏水核壳介孔二氧化硅纳米粒子的合成

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摘要

Mesoporous silica nanoparticles (MSNPs) have been used in variety of applications due to their morphology and porous structure. This work reports the one-pot synthesis of ultrahydrophobic MSNPs using N-cetyl-n,n,n trimethyl ammonium bromide as a cationic surfactant template and ethanol (EtOH) as a cosolvent to form mesopores in the MSNPs. The effects of EtOH on the size and the pore structure of the MSNPs were studied by scanning electron microscopy and transmission electron microscopy. The results show that an addition of EtOH led to an enlargement of the MSNPs and a change in pore structure from a lamellar structure to a radially oriented structure. Co-condensation with two different types of fluoroalkyl silanes; trimethyl(fluoromethyl)silane, and trichloro(1H,1H,2H,2H-perfluorooctyl)silane provided low surface energy MSNPs with a core-shell structure. An assembly on the surface of these F-MSNPs generated nanostructure surface roughness rendering an improvement in surface wettability with water contact angle of 158.6 degrees, which is a characteristic of oleophobic and ultrahydrophobic material.
机译:介孔二氧化硅纳米粒子(MSNPs)由于其形态和多孔结构已被用于各种应用中。这项工作报告了使用N-鲸蜡基-n,n,n三甲基溴化铵作为阳离子表面活性剂模板和乙醇(EtOH)作为助溶剂在MSNPs中形成中孔的一锅法合成超疏水MSNPs。通过扫描电子显微镜和透射电子显微镜研究了EtOH对MSNPs的尺寸和孔结构的影响。结果表明,EtOH的添加导致MSNP的增大,并使孔结构从层状结构变为径向取向结构。与两种不同类型的氟代烷基硅烷的共缩合;三甲基(氟甲基)硅烷和三氯(1H,1H,2H,2H-全氟辛基)硅烷提供了具有核-壳结构的低表面能MSNP。这些F-MSNP的表面上的组件产生了纳米结构表面粗糙度,与158.6度的水接触角改善了表面润湿性,这是疏油和超疏水材料的特征。

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