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arXiv 2201.06864cond-mat.softphysics.app-phphysics.chem-ph
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胶态悬浮液凝胶化的声学监测

Acoustic monitoring of the gelation of a colloidal suspension

Nicolas Bélicard, Marc Junior Niémet-Mabiala, Jean-Noël Tourvieille, Pierre Lidon

摘要:

因为它们对材料的机械性能敏感,甚至可以在不透明的系统中传播,所以声波在许多领域为我们提供了强大的表征工具。常见的技术主要依赖于飞行时间测量,不利用频谱内容:然而,声速和衰减谱包含丰富的信息。这样的声学光谱已经存在,并允许检索关于众所周知的物理化学系统的微妙信息,但建模对于工业系统来说变得遥不可及。在这篇文章中,我们使用一个简单的经验方法来监测二氧化硅悬浮液的凝胶化:我们表明,从声学测量获得的凝胶化时间与更常规的流变学表征确定的成正比。因此,这样的结果开辟了现场监测的时间演变系统在工业环境中的声学方法。

英文摘要:

Because they are sensitive to mechanical properties of materials and can propagate even in opaque systems, acoustic waves provides us with a powerful characterization tool in numerous fields. Common techniques mostly rely on time-of-flight measurements and do not exploit the spectral content: however, sound speed and attenuation spectra contain rich information. Such an acoustic spectroscopy already exists and allows to retrieve subtle information on systems of well-known physico-chemistry, but modeling becomes out of reach for industrial systems. In this article, we use a simple empirical approach to monitor the gelation of silica suspensions: we show that the gelation time obtained from acoustic measurements is proportional to this determined with more conventional rheological characterization. Such a results thus opens the way for in-situ monitoring of time-evolving systems in industrial context with acoustic methods only.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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