油醇烷氧基化物的合成与性能研究

doi:10.3969/j.issn.2097-2806.2025.05.007

Abstract

Abstract:

Oleyl alcohol polyoxyethylene ethers （OE_n, n=3, 5, 7） and oleyl alcohol polyoxyethylene polyoxypropylene ether （OE₃P₃） were synthesized from oleyl alcohol by alkoxylation. Their surface activity, and wetting, emulsifying and foaming properties were studied, as well as the properties of those liquid crystal emulsions prepared with them as emulsifiers. The results showed that the apparent critical micelle concentration （cmc） of OE_n decreased with the increase of EO addition number, and the surface tension （γ_cmc） at the apparent critical micelle concentration was 33-34 mN/m. The surface activity of OE₃P₃ was quite close to that of OE₃. As the EO addition number of OE_n was increased, the dynamic surface activity and wetting ability were enhanced. Compared with OE₃ and OE₇, OE₅ exhibited lower emulsifying ability and higher foam stability. Introducing PO groups into OE₃ molecule could improve its dynamic surface activity, wetting ability, and emulsifying ability, but significantly reduce its foam stability. All emulsions prepared with these oleyl alcohol alkoxylates as emulsifiers formed lamellar liquid crystals and behaved as shear-thinning system. The emulsion added with OE₃ had good stability.

Key words: oleyl alcohol alkoxylate, surface activity, wetting, emulsification, foam, liquid crystal

CLC Number:

TQ423

Ping Li, Zhengwei Zhang, Jie Chai, Peiyu Ren, Shuoyu Wang, Jiayi Sun. Synthesis and properties of oleyl alcohol alkoxylates[J].China Surfactant Detergent & Cosmetics, 2025, 55(5): 591-600.

Figures/Tables 15

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References 29

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	δ_H/ppm	质子积分面积	烷氧基平均加合数
a	0.81~1.00	3.00	3
b	1.00~1.56	34.52	24+3n
e	3.10~4.00	23.94	2+4m+3n

OE_n	cmc/ （mmol/L）	γ_cmc/ （mN/m）	Γ_max/ （μmol/m²）	A_min/?²	pc₂₀	$\Delta G_{\mathrm{mic}}^{\ominus} /$（kJ/mol）	$\Delta G_{\mathrm{ads}}^{\ominus} /$（kJ/mol）
OE₃	0.320	34.17	5.33	31.17	-1.03	-12.83	-19.50
OE₅	0.190	33.91	5.24	31.65	-1.41	-14.13	-20.95
OE₇	0.036	33.79	5.00	33.23	-2.01	-18.28	-25.44
OE₃P₃	0.390	34.47	5.42	30.59	-0.89	-2.37	-18.87

Synthesis and properties of oleyl alcohol alkoxylates

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