在表面上吸附和相互作用的青分片机制
Hongtao Ma1, Yuanyuan Wang1, Ziqian Zhao1
1Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
Journal of colloid and interface science
|September 3, 2025
概括
间活性 (IAA) 强烈吸附于二氧化,形成比非活性更厚的层. 这种由分子相互作用驱动的增强吸附是了解石油工业污染的关键.
科学领域:
- 石油地质化学
- 表面科学
- 体和接口科学
背景情况:
- 在石油工业中,青在矿物质固体上的吸附会造成重大运行问题,包括污染,缩和堵塞.
- 据推测,具有高油/水界面活性的青分片在矿物表面具有优越的吸附能力.
研究的目的:
- 区分和表征交界活性 (IAA) 和交界非活性 (INAA) 的青部分.
- 研究INAA和IAA青在表面的吸附行为和分子间相互作用.
- 阐明青吸附背后的机制及其对石油行业挑战的影响.
主要方法:
- 将青子部分分成间位活性 (IAA) 和非活性 (INAA) 组.
- 使用了表面力量装置 (SFA),原子力显微镜 (AFM) 和石晶微平衡器 (QCM-D).
- 测量了吸附动力学,层厚度,吸附能力,扩散系数和接力.
主要成果:
- 与INAA (∼4.1 nm) 相比,IAA石形成了显著更大的聚合物和更厚的吸附层 (∼67 nm).
- 与INAA相比,IAA青具有较高的吸附能力 (∼150 mg/m2) 和扩散系数 (∼10−8 m2/s).
- 对IAA-相互作用观察到强大的粘附力,与INAA相互作用不同,归因于π-π堆叠,键和范德瓦尔斯力.
结论:
- 因增强的分子间相互作用而表现出对表面的优越吸附能力.
- IAA青的自我结合趋势有助于形成厚厚的吸附层,加剧了污染问题.
- 这项研究提供了关键的洞察力对青分离的行为,推进了对原油开采挑战的理解.
相关概念视频
01:10Silica Gel Column Chromatography: Overview
1.7K
Silica gel column chromatography is a technique for separating compounds using a column packed with silica gel as the stationary phase. This method relies on differences in the polarity of compounds. Based on their polarities, compounds move between the stationary phase (silica gel) and the mobile phase (the solvent), forming discrete bands in the column.
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
1.7K
01:23Surface Appendages of Archaea
147
Archaeal surface appendages are highly specialized structures essential for environmental adaptation, encompassing roles in adhesion, biofilm formation, and motility. Among these appendages, pili and archaella stand out for their distinct morphologies and functionalities, enabling archaea to thrive in diverse and often extreme environments.Pili: Adhesion and Biofilm FormationPili are filamentous structures assembled from pilin protein subunits, primarily contributing to adhesion and biofilm...
147
01:20Sulfur Assimilation
72
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
72