窄分布脂肪醇聚氧乙烯醚在二氧化硅气凝胶改性中的应用性能

doi:10.3969/j.issn.2097-2806.2025.02.005

Abstract

Abstract:

The surface properties of industrial-grade fatty alcohol polyoxyethylene ether （AEO₃） and narrow-distribution AEO₃ in ethanol were analyzed, respectively. The wettability and dispersibility of hydrophobic silica aerogel in the ethanol solutions of the two kinds of AEO₃ were comparatively studied. The results showed that the content of free fatty alcohol had significant influence on the wettability of hydrophobic silica aerogel in the ethanol solutions of AEO₃. Then the modified silica aerogels by using two types of AEO₃ were prepared, which indicated that the hydrophilicity of the modified silica aerogels could be modulated by changing the content of free fatty alcohol in AEO₃ solution and the EO distribution. The higher the content of free fatty alcohol, the better the hydrophilicity; the lower the average EO addition number, the worse the hydrophilicity. The results showed that the contact angle of the silica aerogel modified with narrow-distribution AEO₃ was closer to 90°.

Key words: fatty alcohol polyoxyethylene ether, narrow distribution, application property

CLC Number:

TQ423

Cheng Shi,Zhen Ren,Guangliang Zhang. Application of narrow-distribution fatty alcohol polyoxyethylene ether in modification of silica aerogel[J].China Surfactant Detergent & Cosmetics, 2025, 55(2): 170-175.

Figures/Tables 7

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References 17

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	石蜡膜接触角θ/ （°）	表面张力γ/ （mN/m）
无水乙醇	25.5	22.867
c-AEO₃	29.2	22.950
n-AEO₃	31.8	23.013

	接触角/（°）	吸水量/g	分层时间/min	沉降率/%
无水乙醇	77.69	0.121	267	98
c-AEO₃	52.90	0.128	145	96
n-AEO₃	75.19	0.092	162	97
添加3% （w/%）脂肪醇后的c-AEO₃	50.67	—	—	—
添加6% （w/%）脂肪醇后的c-AEO₃	49.24	—	—	—

	接触角/（°）	润湿时间/s	吸水量/g
c-MSA	83.65	89.59	0.126
n-MSA	89.58	105.97	0.135

	原始质量/mg	失重质量/mg	失重率/%
c-MSA	6.7	3.92	58.51
n-MSA	4.8	2.62	54.58

Application of narrow-distribution fatty alcohol polyoxyethylene ether in modification of silica aerogel

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