2-十一烷基-N-羧甲基-N-羟乙基咪唑啉的合成及性能

doi:10.3969/j.issn.1001-1803.2020.03.003

Abstract

Abstract:

Undecyl hydroxyethyl imidazoline with less salt was synthesized from lauric acid and hydroxyethyl ethylenediamine. Then, 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazolium chloride （LSUHCI） was synthesized with ethyl chloroacetate as quaternization reagent. The structure of the intermediate, i.e. undecyl hydroxyethyl imidazoline, was characterized by FT-IR and mass spectrometry. The composition of the intermediate was also quantitatively analyzed. The structure of LSUHCI was characterized by FT-IR and ¹H NMR. The physicochemical properties were studied and compared with ordinary industrial product （salt content=8.1%） of 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazolium chloride （UHCI）. The results showed that the NaCl content in LSUHCI was 1.3%, which was a low-salt surfactant product. The balanced surface tension of LSUHCI was 27.52 mN/m. Its critical micelle concentration （cmc）, wettability and emulsifying property were better than UHCI, while foaming ability and foam stability were worse than UHCI.

Key words: lauric acid, imidazoline, low salt content, property

CLC Number:

TQ423

Gao-fei ZHANG,Wei ZHANG,Feng-shou WANG. Synthesis and properties of 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazolium chloride[J].China Surfactant Detergent & Cosmetics, 2020, 50(3): 155-158.

Figures/Tables 6

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Tab. 1

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Tab. 2

References 11

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序号	组份名称	w/%	备注
1	十一烷基羟乙基咪唑啉中间体	70.6~71.2	中间体
2	N-（2-氨乙基）-N-（2-羟乙基）十二烷酰胺	16.7~17.3	中间体
3	N-[2-[（2-羟乙基）氨基]乙基]十二烷酰胺	5.5~6.1	中间体
4	月桂基咪唑啉二酰胺	5.0~5.6	副产物
5	月桂基咪唑啉酰胺酯	0.8~1.2	副产物
6	哌嗪	0.02~0.05	副产物

样品	V/mL
样品	30 s	3 min	5 min
LSUHCI	470	430	400
UHCI	535	515	500

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Synthesis and properties of 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazolium chloride

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