环氧丙烷与1, 2-环氧丁烷对脂肪醇醚构效关系的影响研究

doi:10.3969/j.issn.2097-2806.2026.07.002

Abstract

Abstract:

This study aimed to elucidate the impact of propylene oxide（PO）and 1, 2-butylene oxide（BO）incorporation on the properties of AEO₇ surfactant. A comparative investigation was conducted on the salt tolerance, alkali resistance, foaming, emulsification, wetting ability, cloud point, pour point, and detergency of the pristine and modified surfactants. The results demonstrated that the introduction of PO or BO groups generally compromised the alkali resistance of AEO₇, with BO exerting a more detrimental effect. Modification also altered salt tolerance, and BO incorporation notably reduced water solubility and salt tolerance. Both PO and BO significantly accelerated defoaming kinetics, with BO-modified variants exhibiting superior performance. Emulsifyingability was markedly enhanced due to improved compatibility between the surfactant hydrophobic tail and the oil phase. Wetting performance was also improved, particularly in BO-modified samples. Furthermore, the incorporation of PO/BO led to a distinct reduction in both cloud point and pour point, which showed a clear correlation with the type and extent of hydrophobic modification. Regarding detergency, PO modification improved the removal of sebum soil, whereas BO incorporation reduced the cleaning efficiency for both carbon black and sebum soils. This work provides fundamental experimental evidence and theoretical insights for the targeted molecular design and performance optimization of alkoxylated surfactants.

Key words: alcohol ethoxylate, propylene oxide/butylene oxide modification, surfactant, salt tolerance, emulsification performance, structure-property relationship

CLC Number:

TQ423

Hongyang Wang, Huibin Liang, Chunyu Wang, Ke Zhang, Jingjie Zhou, Tao Geng. Investigating the impact of propylene oxide and 1, 2-butylene oxide on the structure-activity relationship offatty alcohol ethers[J].China Surfactant Detergent & Cosmetics, 2026, 56(7): 841-852.

Figures/Tables 12

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References 20

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Sample	cmc/ （mol/L）	γ_cmc/ （mN/m）	Γ_max/ （μmol/m²）	A_min/ nm²	pc₂₀	$ \Delta G_{\mathrm{mic}}^{\theta}$/ （kJ/mol）	$ \Delta G_{\text {ads }}^{\theta}$/ （kJ/mol）
AEO₇	3.30×10^-5	28.85	1.90	0.88	5.61	-35.33	-35.77
AEO₇+ 1PO	3.11×10^-5	29.59	1.88	0.88	5.65	-35.68	-35.91
AEO₇+ 2PO	2.75×10^-5	29.72	1.69	0.99	5.87	-35.99	-36.24
AEO₇+ 3PO	2.12×10^-5	30.39	1.44	1.15	5.92	-30.92	-31.22
AEO₇+ 1BO	6.02×10^-6	29.59	1.40	1.18	6.54	-39.75	-40.06
AEO₇+ 2BO	6.59×10^-6	30.81	1.39	1.20	6.49	-39.53	-39.83

Investigating the impact of propylene oxide and 1, 2-butylene oxide on the structure-activity relationship offatty alcohol ethers

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