Critical Phenomena in Silica Gel

9320726康奈尔技术摘要：这个凝聚态物理项目使用光散射和热力学测量来研究淬火杂质对含有两个组分的流体中的临界现象和相分离的影响。猝灭的杂质为稀刚性二氧化硅网络的凝胶结构。这些网络的大表面积影响着携带在这些凝胶结构中的流体的平衡和非平衡性质。通过静态和动态光散射以及量热法研究了二元流体在这些凝胶中的行为。对受控样品的热力学测量和散射测量的结合，应该会大大增加我们对多孔材料对液体体系的影响的理解，以及对其他体系中相的影响的更广泛的问题。非技术摘要：这门凝聚态物理使用光散射和热力学测量来研究淬火杂质对含有两个组分的流体中的临界现象和相分离的影响。猝灭的杂质为稀刚性二氧化硅网络的凝胶结构。当流体填充凝胶链之间的间隙时，凝胶网络的大表面积改变了它们的平衡和非平衡性质。通过静态和动态光散射以及量热法研究了二元流体在这些凝胶中的行为。对受控样品的热力学测量和散射测量的结合，应该会大大增加我们对多孔材料对液体体系的影响的理解，以及对其他体系中相的影响的更广泛的问题。例如，在自然界中，有许多情况下，流体，如石油，携带在高表面是固体，如页岩。这项基础性研究可能会提供与这些技术上重要的系统相关的信息。***

9320726 Cannell Technical abstract: This Condensed Matter Physics project used light scattering and thermodynamic measurements to study the effectd of quenched impurities on critical phenomena and phase separations in fluids containing two components. The quenched impurities are gel structures of dilute rigid silica networks. The large surface area of these networks influence the equilibrium and non-equilibrium properties of fluids that are entrained in these gel structures. The behavior of binary fluids in these gels are studied by static and dynamic light scattering, as well as calorimetry. The combination of thermodynamic and scattering measurements on controlled samples should add considerable to our understanding of the effects of porous materials on liquid systems, as well as to the broader issue of their effects on phase in other systems. Non-technical abstract: This Condensed Matter Physics employs light scattering and thermodynamic measurements to study the effects of quenched impurities on critical phenomena and phase separations in fluids containing two components. The quenched impurities are gel structures of dilute rigid silica networks. When fluids fill the interstitices between the gel strands, their equilibrium and non-equilibrium properties are modified by the large surface area of the gel network. The behavior of binary fluids in these gels are studied by static and dynamic light scattering, as well as calorimetry. The combination of thermodynamic and scattering measurements on controlled samples should add considerable to our understanding of the effects of porous materials on liquid systems, as well as to the broader issue of their effects on phase in other systems. For example, there are many instances in nature where fluids, such as oil, are entrained in high surface are solids, such as shale. This fundamental study may provide information relevant to these technologically important systems. ***