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首页> 外文期刊>Journal of enhanced heat transfer >A REVIEW OF OPTICAL AND RADIATIVE PROPERTIES OF NANOPARTICLE SUSPENSIONS: EFFECTS OF PARTICLE STABILITY, AGGLOMERATION, AND SEDIMENTATION
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A REVIEW OF OPTICAL AND RADIATIVE PROPERTIES OF NANOPARTICLE SUSPENSIONS: EFFECTS OF PARTICLE STABILITY, AGGLOMERATION, AND SEDIMENTATION

机译：纳米粒子悬浮液的光学和辐射性能综述：颗粒稳定性，凝聚和沉降的影响

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摘要

Nanoparticle suspensions (NPSs) are suspensions of nanosize particles in base fluids in the form of a solid-liquid mixture. They are used extensively in a wide range of industrial and engineering applications, and show considerably different and tunable, physiochemical, thermal, and radiative properties compared to other solutions. It has been demonstrated that added nanoparticles can significantly alter and enhance the optical and radiative properties of the base fluids. There is still a concern about the particle agglomeration and sedimentation behaviors and the long-term stability of NPSs under different conditions, which may limit their potential reliable applications. There is a close relationship between the particle agglomeration and the optical and radiative properties of nanoparticle suspensions. In this review, the relationship between these fundamental properties with the emphasis on the procedural stability of nanoparticle suspensions is explored. Different issues related to the preparation and the characterization of NPSs, their sedimentation, the effects of particle types, sizes on individual, hybrid, and agglomerated nanoparticle suspensions, as well as the effect of pH values, are discussed. Their effects on the optical and spectral radiative properties are also discussed. Simplified analyses are outlined based on dependent-independent scattering demarcation and effective properties of NPSs.
机译：纳米粒子悬浮液（NPS）是纳米颗粒在基础流体中以固液混合物的形式悬浮液。它们在广泛的工业和工程应用中广泛使用，与其他解决方案相比，显示出相当多的不同和可调性，理化的，热和辐射性能。已经证明，添加的纳米颗粒可以显着改变并增强基础流体的光学和辐射性能。仍然涉及颗粒聚集和沉降行为以及NPS在不同条件下的长期稳定性，这可能限制其潜在可靠的应用。颗粒聚集与纳米粒子悬浮液的光学和辐射性能之间存在密切的关系。在本综述中，探讨了这些基本属性之间的关系，重点是纳米粒子悬浮液的程序稳定性。讨论了与NPSS的制备和表征有关的不同问题，粒子类型的沉降，粒子类型的效果，均匀的纳米颗粒悬浮液以及pH值的效果。还讨论了对光学和光谱辐射性质的影响。简化分析是基于从属于独立于无关的散射分界和NPS的有效性质的分析。

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