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Synthesis, Characterization and Surface Activity of Alkyl m-Xylene Sulfonate Isomers |
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| Authors: | Huo-xin Luan Wen-xiang Wu Jie-cheng Cheng Tao Yu Guang-miao Qu Ya-bin Xu Guo-qiao Li Xiao-yu Gao An-jun Li Dan-dan Yuan Wei Tong Zhong Li Kang Liu Guo-yu Liu Wei Ding |
| Affiliation: | 1. College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, China 2. Petroleum Development Engineering, Northeast Petroleum University, Daqing, 163318, China 3. Daqing Oilfield Limited Company of CNPC, Daqing, 163453, China |
| Abstract: | This paper deals with the synthesis of a series of alkyl m-xylene sulfonate isomers (with the m-xylene located at the eighth carbon atom along the long alkyl chain) by the Friedel?CCrafts reaction, and the Grignard reaction followed by hydrogenation. The structures were confirmed by 1H NMR. All analytical methods indicated high levels of purity of the isomers with the eighth carbon atom at the long alkyl chain. The critical micelle concentration (CMC), surface tension and maximum surface excess concentration at the CMC and area per molecule at the interface were determined. As the long alkyl chains increased the surfactant molecule tends to pack closely at the gas?Cliquid interface. Accordingly, the CMC decreased, the adsorption density increased, and the surface tension reduction was strengthened. |
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