Molecular Interactions between a Biodegradable Demulsifier and Asphaltenes in an Organic Solvent
| Autor: | Anand Natarajan, David Harbottle, Jacob H. Masliyah, Hongbo Zeng, Zhenghe Xu, Natalie P. Kuznicki |
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| Rok vydání: | 2016 |
| Předmět: |
General Chemical Engineering
Intermolecular force Energy Engineering and Power Technology Surface forces apparatus 02 engineering and technology Adhesion 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Fuel Technology Adsorption Chemical engineering Ethyl cellulose chemistry Polymer chemistry Mica 0210 nano-technology Macromolecule Asphaltene |
| Zdroj: | Energy & Fuels. 30:10179-10186 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.6b01889 |
| Popis: | A surface forces apparatus (SFA) was used to measure the intermolecular forces between a biodegradable demulsifier (ethyl cellulose, EC) and asphaltenes immobilized individually on molecularly smooth mica surfaces in an organic solvent. A steric repulsion on approach between the immobilized EC layers and asphaltenes was measured despite strong adhesion (Fad/R ≈ −2 mN/m; Wad = 0.42 mJ/m2) during retraction. The measured adhesion was attributed to the interpenetration and tangling of aliphatic branches of swollen asphaltenes and solvated chains of EC macromolecules. Competitive adsorption of EC on/in immobilized asphaltene layers was confirmed by combining SFA force measurements and atomic force microscopy (AFM) imaging. Following the injection of EC-in-toluene solution, an immediate ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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