| 一种新型甜菜碱型沥青乳化剂的合成及在线红外光谱分析 |
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| 作者单位： | ;1.山东大学化学与化工学院 |
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| 摘 要： | 以月桂醇、环氧氯丙烷、二甲胺、氯乙酸经三步反应合成出一种新型甜菜碱型沥青乳化剂.确定了第一步合成2-(十二烷氧基亚甲基)环氧乙烷的最佳反应条件,其收率为75.7%.利用红外光谱对3种产物结构进行了表征,利用在线红外光谱技术对第一步合成2-(十二烷氧基亚甲基)环氧乙烷的反应进行追踪分析,检测出中间体.基于以上实验数据,提出了合理的反应机理.最终产物的临界胶束浓度为8.8×10-5mol/L,在临界胶束浓度下的表面张力为21.2 mN/m.该乳化剂属于中裂型沥青乳化剂.
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| 关 键 词： | 沥青 乳化剂 甜菜碱型 合成 在线红外 |
A Novel Betaine Type Asphalt Emulsifier Synthesized and Investigated by Online FTIR Spectrophotometric Method |
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| Abstract: | A novel betaine type asphalt emulsifier was synthesized by three steps with the reactions of lauryl alcohol,epichlorohydrin,dimethylamine and chloroacetic acid.The optimum reaction condition was obtained for the synthesis of the first step of 2-(dodecyloxymethyl)oxirane.The yield is 75.7%.The structures of the three products were identified by FTIR.The first synthesis step of 2-(dodecyloxymethyl)oxirane was traced by online FTIR technique.The intermediate was detected by the online FTIR analysis.Based on the experimental data,a plausible reaction mechanism was proposed for the reaction.The CMC of the objective product is 8.8×10-5 mol/L.The surface tension at CMC is 21.2 mN/m.The emulsifier belongs to medium-set asphalt emulsifier. |
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| Keywords: | asphalt emulsifier betaine synthesis online FTIR |
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