TOTAL Research &Technology Gonfreville, 4864, Zone Industrielle du Port Autonome du Havre, Carrefour n°4- BP27, 76700 Harfleur, France.
TOTAL Research &Technology Feluy, Zone Industrielle C, B-7181 Feluy, Belgium.
J Colloid Interface Sci. 2021 Jul;593:21-31. doi: 10.1016/j.jcis.2021.02.076. Epub 2021 Mar 2.
The objective is to noninvasively probe the local hydrocarbon dynamics at asphaltene/maltene interfaces to reveal the global characteristics of bitumen at increasing temperatures and under various mechanical constraints.
We propose multidimensional (1D and 2D) nuclear magnetic relaxation (NMR) experiments to characterize the dynamic properties of hydrocarbons for a set of bitumen from 40 to 180 °C. The convergence towards universal theoretical modelling of NMR relaxation experiments gives a comprehensive understanding of hydrocarbon transport in these very weakly permeable samples. Moreover, a multivariate statistical analysis allows for correlating these NMR relaxation data for all bitumen samples to the main empirical parameters by qualifying the bitumen grading, such as the penetrability, softening and fragility points over a large range of temperatures.
These new experimental and theoretical multiscale approaches link hydrocarbon interfacial dynamics to the global characteristics of various bitumen types. This is critical for grading these universally encountered materials.
目的是无创探测沥青/胶质界面处的局部碳氢动力学，以揭示在升高温度和各种机械约束下，沥青的整体特性。
我们提出多维（1D 和 2D）核磁共振弛豫（NMR）实验，以表征一系列沥青从 40 到 180°C 的碳氢动力学特性。NMR 弛豫实验的普遍理论建模的收敛为这些非常弱渗透性样品中的碳氢传输提供了全面的理解。此外，多元统计分析允许将所有沥青样品的这些 NMR 弛豫数据与主要经验参数相关联，通过对渗透性、软化点和脆性点等进行分级，来对沥青进行定性，从而在很大的温度范围内对这些参数进行分级。
这些新的实验和理论多尺度方法将碳氢界面动力学与各种类型沥青的整体特性联系起来。这对于对这些普遍存在的材料进行分级至关重要。
