Synthesis and Properties of a Cationic Gemini Asphalt Emulsifier |
| |
Authors: | Jiajia Liu Yicheng Xie Hujun Xu |
| |
Affiliation: | 1. School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China;2. The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi |
| |
Abstract: | A cationic Gemini surfactant with a benzene ring (abbreviated as C14‐CGB) was synthesized in 2 steps with aniline, epichlorohydrin, and N,N‐dimethyltetradecylamine as starting materials. This product was characterized using mass spectroscopy and nuclear magnetic resonance (1H NMR). The critical micelle concentration (CMC) and surface tension (γcmc) of C14‐CGB were measured from 298 to 313 K and thermodynamic parameters of micellization were calculated. The results showed that the CMC and γcmc were 1.269 × 10?3 mol L?1 and 38.33 mN m?1 at 298 K, respectively. Moreover, upon increasing the temperature, the CMC increases, γcmc decreases, the maximum surface adsorption capacity (Γmax) decreases, and the minimum molecular area (Amin) increases. The emulsified asphalt test showed that C14‐CGB is a slow‐breaking asphalt emulsifier exhibiting excellent emulsifying ability. |
| |
Keywords: | Gemini surfactant Surface tension Synthesis Asphalt emulsifier |
|
|