期刊
FUEL
卷 299, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2021.120872
关键词
Asphaltene aggregation; Langmuir monolayer; Brewster angle microscopy; Reflection spectroscopy; Electronic microscopy
资金
- Operative Programme FEDER-Andalucia (2014-2020, objective 1.2.2.) through Junta de Andalucia (CECEU) [A1122062E0, P12 FQM-2310AT17-5549]
- Ministry of Science and Innovation of Spain [PID2019-110430GB-C22, PID2019-105195RA-I00]
This study provides a comprehensive experimental approach and structural analysis to reveal a two-step aggregation process of asphaltene at interfaces, showing that different aggregation states result in different intramolecular cohesion forces and interaction patterns.
Within this work we provide an extensive experimental approach comprised by pressure-area isotherms and optical studies at interfaces (by means of Brewster angle microscopy and reflection spectroscopy) combined with electronic microscopies and mass spectrometry examination of Langmuir-Blodgett films transferred from spreading concentrations above and below the nanoaggregate-to-cluster aggregation threshold. It will be shown that the associated structures already present in the bulk solutions are preserved upon transference to a large extent and primarily determine the subsequent asphaltene film structure at the interface. The different morphologies derived from each aggregation state reveals the intermolecular cohesion forces that are of short-range character in the nanoaggregate range, while the elongated rod-like structures, mainly observed for high spreading concentrations, indicates a longer order interaction responsible for the clusters formation at high molecular packing. These features provide new evidence of a two-step aggregation process at interfaces that, for this particular asphaltene sample, matches with that predicted by the modified Yen model.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据