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中文摘要: 以苯胺、环氧氯丙烷、哌啶和1-溴癸烷为原料经过三步反应合成了含有哌啶环的阳离子双子表面活性剂C10-CGP。采用FT-IR、MS和1H NMR对产物进行了结构表征。研究了其Krafft点、乳化性能和乳化沥青时的相关性能，并测定了25~40 ℃的临界胶束浓度(cmc)、平衡表面张力(γcmc)及相应的热力学函数。结果表明，C10-CGP的Krafft点低于0 ℃，乳化分水时间为532 s。25 ℃时，cmc为0.976×10-3 mol/L，γcmc为28.93 mN/m。随着温度的升高，cmc增大、γcmc减小、饱和吸附量(Γmax)减小、极限占有面积(Amin)增大。乳化沥青测试表明，C10-CGP是慢裂型沥青乳化剂，贮存稳定好且乳化沥青粒径分布较窄。
Abstract:A cationic Gemini surfactant containing bis-piperidinium group (hereinafter refers to as C10-CGP) was synthesized via three steps with aniline, epichlorohydrin, piperidine and 1-bromodecane as starting materials. The product was characterized by FT-IR, MS and 1H NMR. The Krafft point and emulsifying power of the product as well as performance of emulsified asphalt prepared with the product were examined. The critical micelle concentration (cmc) and corresponding surface tension (γcmc) of C10-CGP were measured at temperature range from 25 ℃ to 40 ℃ and thermodynamic parameters of the micellization were calculated. Results show that the Krafft point of C10-CGP is below 0 ℃; stable time of emulsified liquid achieves 532 s; the cmc and γcmc at 25 ℃ is 0.976×10-3 mol/L and 28.93 mN/m respectively. With the temperature increases, the cmc increases, while the γcmc decreases, the maximum surface adsorption capacity (Γmax) decreases and the minimum molecule sectional area (Amin) increases. Emulsified asphalt test shows that C10-CGP is a slow-crack type asphalt emulsifier; storage stability of the emulsified asphalt is good and particle size distribution of the emulsified asphalt is narrow.
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|XIE Yi-cheng||School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China|