Citation: LIU Jiajia, XIE Yicheng, XU Hujun. Synthesis and Properties of a Cationic Gemini Asphalt Emulsifier[J]. Chinese Journal of Applied Chemistry, ;2018, 35(5): 552-558. doi: 10.11944/j.issn.1000-0518.2018.05.170146 shu

Synthesis and Properties of a Cationic Gemini Asphalt Emulsifier

School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China

Corresponding author: XU Hujun, xu6209@163.com
Received Date: 8 May 2017
Revised Date: 27 June 2017
Accepted Date: 30 August 2017

Fund Project: Supported by the Jiangsu Provincial Prospective Joint Research Project of Industry-Academy-Research(No.BY2015019-35)the Jiangsu Provincial Prospective Joint Research Project of Industry-Academy-Research BY2015019-35

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A cationic Gemini asphalt emulsifier with benzene ring(symbolized as G-T) was synthesized with aniline, epichlorohydrin and N, N-dimethyltetradecylamine by two steps. The product was characterized by Fourier transform infrared spectroscopy(FT-IR), mass spectroscopy, and proton nuclear magnetic resonance(¹H NMR) spectroscopy. The Krafft point, emulsifying power and performance of emulsified asphalt were studied. The critical micelle concentration(cmc) and surface tension(γ_cmc) of G-T were measured from 25℃ to 40℃ and thermodynamic parameters of the micellization were calculated. The results show that the Krafft point of G-T is below 0℃, and the stable time of the emulsified liquid is up to 309 s. The cmc and γ_cmc are 1.269×10^-3 mol/L and 38.33 mN/m at 25℃, respectively. With the rise of temperature, the cmc increases, the γ_cmc decreases, the maximum surface adsorption capacity(Γ_max) decreases and the minimum molecule area(A_min) increases. Emulsified asphalt test shows that G-T is a slow-crack asphalt emulsifier. The prepared emulsified asphalt meets the technical specifications of micro-surfacing.
- Gemini surfactants,
- surface tension,
- emulsifying properties,
- asphalt emulsifie
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