文献类型：期刊文献

英文题名：Study on Adsorption and Antirinsing Performances of Alcohol Ether Sulfate/Dodecyl Trimethylammonium Chloride Mixtures on Silica

作者：Li, Mei[1,2];He, Xiujuan[2];Pu, Xue[2];Gang, Hongze[1,3];Chen, Xiaolu[2];Su, Zhiqing[2];Mu, Bozhong[1,3];Li, Yingcheng[2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Sinopec Shanghai Res Inst Petrochem Technol Co Ltd, Sinopec Key Lab Surfactants EOR, Shanghai 201208, Peoples R China;[3]East China Univ Sci & Technol, Engn Res Ctr Microbial Enhanced Oil Recovery, Shanghai 200237, Peoples R China

年份：2025

卷号：41

期号：19

起止页码：11987

外文期刊名：LANGMUIR

收录：;EI(收录号：20251918398192);WOS:【SCI-EXPANDED(收录号:WOS:001485232200001)】；

基金：This work was supported by a research grant from the China Petroleum & Chemical Corporation (SINOPEC Corp.).

语种：英文

外文关键词：Binary mixtures - Electrostatic coatings - Molar ratio - Sodium dodecyl sulfate - Sulfate minerals

摘要：This study investigated the adsorption and antirinsing performances of sodium alcohol ether sulfate (AEnS), dodecyl trimethylammonium chloride (DTAC), and mixtures of AEnS/DTAC with an equal molar ratio on silica. The adsorption process for individual surfactants was characterized by an initial slow stage, followed by a sharp increase with longer threshold times. In contrast, AEnS/DTAC exhibited a shorter threshold time. Molecular simulation results indicate that the AEnS/DTAC formed a structure wherein positively charged DTAC was close to the silica surface, while negatively charged AEnS resided close to the cation layer of DTAC. This assembly effectively reduced the electrostatic repulsion between AEnS and silica, as well as among DTAC molecules, thereby achieving the highest adsorption rate and adsorption amount. For antirinsing performances, AEnS was quickly washed off, whereas DTAC shows the lowest desorption rate due to their substantial electrostatic attraction toward silica. Notably, the AEnS/DTAC exhibits enhanced antirinsing, confirmed by atomic force microscopy (AFM) results. This research enhances our understanding of surfactant-silica interactions and offers valuable insights for practical applications in oil displacement, mineral flotation, and surface coatings.