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Rise of Liquid in a Capillary Tube01:18

Rise of Liquid in a Capillary Tube

When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
Two Components: Liquid–Liquid Systems01:27

Two Components: Liquid–Liquid Systems

A pressure-composition phase diagram explicitly describes the behavior of an ideal solution of two volatile liquids under varying pressures and compositions. A pressure-composition diagram has two main curves. The bubble point curve represents the plot of pressure versus liquid mole fraction. It indicates the pressure at which the first bubble of vapor forms from the liquid phase as the system pressure decreases.The dew point curve is the pressure versus vapor mole fraction. It indicates the...
Nonideal Two-Component Liquid Solutions01:29

Nonideal Two-Component Liquid Solutions

Nonideal liquid solutions, also known as real solutions, do not strictly follow Raoult's law. Raoult's law is a rule of thumb in physical chemistry. However, not all mixtures adhere to this law due to varying molecular interactions. For example, in an acetone/chloroform solution, the individual vapor pressures of the components are lower than expected, resulting in a total vapor pressure below that predicted by Raoult's law, causing a negative deviation.On the other hand, in an ethanol/water...
Liquid–Solid Solutions01:29

Liquid–Solid Solutions

The process of a solid dissolving in a liquid to form a solution is governed by the solubility limit, which is the maximum amount of the solid substance, or solute, that can be dissolved in a specific volume of the liquid or solvent. As the solute dissolves, it reaches a point where no more solute can be dissolved at a given temperature - this is known as the saturation point. However, if further solute is added and it manages to dissolve, the solution becomes supersaturated. Supersaturated...

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相关实验视频

Updated: Jul 16, 2026

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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尼蒂2是一种新的液态玻璃.

Robert F Tournier1, Michael I Ojovan2

  • 1UPR 3228 Centre National de la Recherche Scientifique, Laboratoire National des Champs Magnétiques Intenses, European Magnetic Field Laboratory, Institut National des Sciences Appliquées de Toulouse, Université Grenoble Alpes, F-31400 Toulouse, France.

Materials (Basel, Switzerland)
|October 28, 2023
PubMed
概括

这项研究揭示了NiTi2.2等材料在液体-液体过渡过程中形成的新热力学阶段 (配置). 这个阶段表现出一种记忆效应,影响未来的过渡和材料特性.

关键词:
它们的配置是configurons.玻璃玻璃玻璃玻璃玻璃的玻璃.液体玻璃玻璃的情况分子动态模拟的分子动态模拟.阶段过渡 阶段过渡 阶段过渡

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TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method
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科学领域:

  • 材料科学 材料科学 材料科学
  • 热力学是一种热力学.
  • 计算化学的计算化学

背景情况:

  • 液体-液体过渡往往先于外热事件,然后是化温度以上的内热过渡.
  • 这些转变与玻璃形成有关,并可能涉及结晶,由非经典的核化理论预测.

研究的目的:

  • 研究液体-液体过渡的热力学性质和新阶段的形成.
  • 探索破裂键 (构造) 和透值在这些转变中的作用.
  • 用分子动力学模拟来证明这些转变的可逆性.

主要方法:

  • 利用分子动力学模拟研究NiTi2在高压 (1000GPa) 和不同温度 (300-1000K) 下.
  • 通过操纵温度和压力来诱导可逆的第一阶段过渡.
  • 分析了新的热力学阶段 (配置) 的形成及其特性.

主要成果:

  • 确定了一个新的热力学阶段,由在Tx形成的"构造" (断裂键) 组成,其恒定度高达Tn+.
  • 观察到一个持续到Tn+的液态玻璃分量 (Δε).
  • 在NiTi2中证明了可逆的第一阶转变,在冷却时观察到记忆效应,显示液态玻璃存在 (Δε = 0.22335) 并预测Tn+ = 2120 K为Tm = 1257 K.

结论:

  • 该研究确定了与液体-液体过渡相关的新热力学阶段 (配置) 的存在和特征.
  • 这些发现强调了透和断裂的纽带在推动这些转型中的作用.
  • 在NiTi2中观察到的记忆效应强调了材料在极端条件下的复杂热力学行为.