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首页> 外文期刊>Applied Surface Science >Characterization and reactivity of sodium aluminoborosilicate glass fiber surfaces
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Characterization and reactivity of sodium aluminoborosilicate glass fiber surfaces

机译：铝硼硅酸钠玻璃纤维表面的表征和反应性

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Multicomponent complex oxides, such as sodium aluminoborosilicate glass fibers, are important materials used for thermal insulation in buildings and homes. Although the surface properties of single oxides, such as silica, have been extensively studied, less is known about the distribution of reactive sites at the surface of multicomponent oxides. Here, we investigated the reactivity of sodium aluminoborosilicate glass fiber surfaces for better understanding of their interface chemistry and bonding with acrylic polymers. Acetic acid (with and without a C-13 enrichment) was used as a probe representative of the carboxylic functional groups in many acrylic polymers and adhesives. Inverse gas chromatography coupled to a mass spectrometer (IGC-MS), and solid state nuclear magnetic resonance (NMR), were used to characterize the fiber surface reactions and surface chemical structure. In this way, we discovered that both sodium ions in the glass surface, as well as sodium carbonate salts that formed on the surface due to the intrinsic reactivity of this glass in humid air, are primary sites of interaction with the carboxylic acid. Surface analysis by X-ray photoelectron spectroscopy (XPS) confirmed the presence of sodium carbonates on these surfaces. Computer simulations of the interactions between the reactive sites on the glass fiber surface with acetic acid were performed to evaluate energetically favorable reactions. The adsorption reactions with sodium in the glass structure provide adhesive bonding sites, whereas the reaction with the sodium carbonate consumes the acid to form sodium-carboxylate, H2O and CO2 without any contribution to chemical bonding at the interface. (C) 2016 Elsevier B.V. All rights reserved.
机译：多组分复合氧化物，例如铝硼硅酸钠玻璃纤维，是用于建筑物和房屋隔热的重要材料。尽管已经对诸如二氧化硅的单一氧化物的表面性质进行了广泛的研究，但是对于多组分氧化物表面上反应性位点的分布知之甚少。在这里，我们调查了铝硼硅酸钠玻璃纤维表面的反应性，以更好地了解它们的界面化学以及与丙烯酸聚合物的键合。乙酸（有或没有C-13富集）被用作代表许多丙烯酸聚合物和粘合剂中羧基官能团的探针。反相质谱联用质谱仪（IGC-MS）和固态核磁共振（NMR）表征纤维表面反应和表面化学结构。这样，我们发现玻璃表面中的钠离子以及由于该玻璃在潮湿空气中的固有反应性而在表面上形成的碳酸钠盐都是与羧酸相互作用的主要部位。通过X射线光电子能谱（XPS）进行的表面分析证实了这些表面上存在碳酸钠。对玻璃纤维表面的反应部位与乙酸之间的相互作用进行了计算机模拟，以评估在能量上有利的反应。与钠在玻璃结构中的吸附反应提供了粘合点，而与碳酸钠的反应消耗了酸，形成了羧酸钠，H2O和CO2，而对界面的化学键没有任何贡献。 （C）2016 Elsevier B.V.保留所有权利。

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