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首页> 外文期刊>Physica, B. Condensed Matter >Structural and dynamic properties of confined water in nanometric model porous materials (8 angstrom <= 0 <= 40 angstrom)
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Structural and dynamic properties of confined water in nanometric model porous materials (8 angstrom <= 0 <= 40 angstrom)

机译：纳米模型多孔材料（8埃<= 0 <= 40埃）中承压水的结构和动力学性质

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Structural and dynamic properties of confined water have been investigated by "in situ" neutron-scattering experiments. In the medium confinement regime (for MCM-41 host materials: 20 Angstrom less than or equal to circle divide less than or equal to 40 Angstrom) confined water has rather similar properties to bulk (3d) water. The major difference concerns the solidification phase transition. Strong triple-point depression DeltaT(3t) is observed and DeltaT(3t) increases when decreasing the pore diameter circle divide (213 K less than or equal to DeltaT(3t) less than or equal to 233 K). Such a confined water behaves as a supercooled liquid phase. The ultra-confinement (AlPO4-N zeolites: 8Angstrom less than or equal to circle divide less than or equal to 12 Angstrom), is seen to induce the structuration of the confined water and its stability at room temperature T 300 K due to commensurability effect with the AlPO4-5 inner surface. No wetting phenomena are observed for both host materials, the silicic MCM-41 samples and the AlPO4-N zeolite family. (C) 2004 Elsevier B.V. All rights reserved.
机译：承压水的结构和动力学特性已经通过“原位”中子散射实验进行了研究。在中等限制条件下（对于MCM-41主体材料：小于或等于20埃的圆分度小于或等于40埃），密闭水的性质与散装（3d）水相当。主要区别在于凝固相变。当减小孔径圆分度（213 K小于或等于DeltaT（3t）小于或等于233 K）时，会观察到强烈的三点降低DeltaT（3t），而DeltaT（3t）会增加。这样的承压水表现为过冷液相。由于可比性效应，超约束作用（AlPO4-N沸石：小于或等于8埃的圆分度小于或等于12埃）被认为可引起承压水的结构化及其在室温T 300 K下的稳定性。 AlPO4-5内表面。两种基质材料，硅质MCM-41样品和AlPO4-N沸石族均未观察到润湿现象。 （C）2004 Elsevier B.V.保留所有权利。

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