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n-C7 Asphaltenes Characterization as Surfactants and Polar Oil from the HLDN Model Perspective
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-07-21 , DOI: 10.1021/acs.iecr.3c01387 José G. Alvarado 1 , Johnny Bullón 1 , Franklin Salazar-Rodríguez 1 , José G. Delgado-Linares 1, 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-07-21 , DOI: 10.1021/acs.iecr.3c01387 José G. Alvarado 1 , Johnny Bullón 1 , Franklin Salazar-Rodríguez 1 , José G. Delgado-Linares 1, 2
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There is no consensus regarding the role of asphaltenes at the oil–water interface. In trying to solve this uncertainty, this work shows for the first time the n-C7 asphaltenes characterization as surfactants and polar oil based on the normalized hydrophilic–lipophilic deviation model (HLDN). Interfacial tension (IFT) and interfacial rheological properties of asphaltene/solvent/brine systems at equilibrium were determined. Additionally, stability and electrical conductivity measurements of emulsions obtained from those systems were performed. The results seem to indicate that when the asphaltenes concentration CA in the oil is equal to the critical nanoaggregate concentration (CNAC), the optimum formulation (HLDN = 0) of the system is reached. When CA < CNAC (HLDN < 0), the asphaltenes molecules behave similarly to a slightly hydrophilic nonionic surfactants, while when CA ≫ CNAC (HLDN > 0), asphaltenic clusters have a dual behavior as interfacially active lipophilic aggregates and polar oil.
中文翻译：
从 HLDN 模型角度将 n-C7 沥青质表征为表面活性剂和极性油
关于沥青质在油水界面的作用尚未达成共识。为了解决这种不确定性，这项工作首次基于标准化亲水亲油偏差模型（HLD N ）将n -C 7沥青质表征为表面活性剂和极性油。测定了平衡状态下沥青质/溶剂/盐水系统的界面张力（IFT）和界面流变特性。此外，还对从这些系统获得的乳液进行了稳定性和电导率测量。结果似乎表明，当油中沥青质浓度C A等于临界纳米骨料浓度（CNAC）时，最佳配方（HLD达到系统的N =0)。当C A < CNAC (HLD N < 0)时，沥青质分子的行为类似于微亲水性非离子表面活性剂，而当C A ≫ CNAC (HLD N > 0)时，沥青质簇具有界面活性亲脂聚集体和极性聚集体的双重行为。油。
更新日期：2023-07-21
中文翻译：
从 HLDN 模型角度将 n-C7 沥青质表征为表面活性剂和极性油
关于沥青质在油水界面的作用尚未达成共识。为了解决这种不确定性，这项工作首次基于标准化亲水亲油偏差模型（HLD N ）将n -C 7沥青质表征为表面活性剂和极性油。测定了平衡状态下沥青质/溶剂/盐水系统的界面张力（IFT）和界面流变特性。此外，还对从这些系统获得的乳液进行了稳定性和电导率测量。结果似乎表明，当油中沥青质浓度C A等于临界纳米骨料浓度（CNAC）时，最佳配方（HLD达到系统的N =0)。当C A < CNAC (HLD N < 0)时，沥青质分子的行为类似于微亲水性非离子表面活性剂，而当C A ≫ CNAC (HLD N > 0)时，沥青质簇具有界面活性亲脂聚集体和极性聚集体的双重行为。油。
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