肺表面活性物质
接口(物质)
干涉测量
化学
化学工程
化学物理
材料科学
纳米技术
计算化学
物理
光学
工程类
吉布斯等温线
作者
Dongyan Yang,Shengli Yuan,Yuqi Chen,Ying Huang,Lei Ma,Deyong He,Ming Duan,Qian-Qian Ou,Yong Tang,Ming Duan,Yan Xiong
出处
期刊:Langmuir
[American Chemical Society]
日期:2024-02-07
标识
DOI:10.1021/acs.langmuir.3c03117
摘要
In this work, the interaction performance of zwitterionic surfactant [dodecyl dimethyl sulfopropyl betaine (DSB-12) and hexadecyl dimethyl sulfopropyl betaine (DSB-16)] at the n-octadecane oil surface is investigated from experimental and simulation insights. For a macroscopic experiment, interfacial interferometry technology was developed for real-time monitor interaction performances and to obtain the quantitative interfacial thickness and mass results. The Langmuir model was characterized by thermodynamic analysis, deducing the aggregation spontaneity of DSB-16 > DSB-12 with ΔGagg(DSB-16) = −5.94 kJ mol–1 < ΔGagg(DSB-12) = 24.08 kJ mol–1. A three-step dynamic model (adsorption, arrangement, and aggregation) was characterized by kinetic analysis, indicating arrangement process as slow-limiting step with k2(arr) < k1(ads), k3(agg). For microscopic simulation, and molecular dynamic (MD) method was utilized to theoretically investigate interaction performances and obtain the interfacial configuration and energy results. The interaction stability and interaction strength were indicated to be DSB-16 > DSB-12 with differences of final energy ΔEfin = 48–88 kcal mol–1. The interaction mechanism was explained by proposing the model of “response enhancement” and “deposition activity” for DSB-16 interactions, and “response decrease” and “elution activity” for DSB-12 interactions. The different performances can be attributed to the different interaction forms and forces of surfactants. This work provided a platform for performance and mechanism investigation between the surfactant molecule and oil surface, which is of great significance in reservoir exploitation and enhanced oil recovery (EOR).
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