Synthesis, Characterization and Properties of N-Alkyl-N,N-di(2-hydroxyethyl) Amine Oxides

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• 作者：Hongqin Liu ; Guoying Shi ; Baocai Xu ; Shuyu Chen…
• 关键词：N ; Alkyl ; N ; N ; Di(2 ; hydroxyethyl) amine oxides ; Surface activities ; Interfacial tensions ; Foam properties ; Emulsification ability
• 刊名：Journal of Surfactants and Detergents
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：20
• 期：1
• 页码：129-136
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Industrial Chemistry/Chemical Engineering; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution; Surfaces and Interfaces, Thin Films; Polymer Sciences; Physical Chem
• 出版者：Springer Berlin Heidelberg
• ISSN：1558-9293
• 卷排序：20

文摘

N-Dodecyl-N,N-di(2-hydroxyethyl) amine oxide (C₁₂DHEAO) and N-stearyl-N,N-di(2-hydroxyethyl) amine oxide (C₁₈DHEAO) were synthesized with N-alkyl-diethanolamine and hydrogen peroxide. Their chemical structures were confirmed using 1H-NMR spectra, mass spectral fragmentation and FTIR spectroscopic analysis. It was found that C₁₂DHEAO and C₁₈DHEAO reduced the surface tension of water to a minimum value of approximately 28.75 mN m−1 at concentration of 2.48 × 10−3 mol L−1 and 32.45 mN m−1 at concentration of 5.21 × 10−5 mol L−1, respectively. The minimum interfacial tension (IFT_min) and the dynamic interfacial tension (DIT) of oil–water system were measured. When C₁₈DHEAO concentration was in the range of 0.1–0.5%, the IFT_min between liquid paraffin and C₁₈DHEAO solutions all reached the ultra-low interfacial tension. Furthermore, their foam properties were investigated by Ross-Miles method, and the height of foam of C₁₂DHEAO was 183 mm. It was also found that they showed strong emulsifying power.