餐厨废弃油脂合成的生物油磺酸盐与碱复配的界面性能

doi:10.13218/j.cnki.csdc.2018.05.005

Abstract

Abstract: A bio-oil sulfonate was synthesized by sulfonation of waste cooking oil.A compounded system of bio-oil sulfonate and sodium carbonate was prepared.The interfacial activity,dynamic interfacial tension,interfacial tension stability and partition property of the blended system were measured.Results show that the bio-oil sulfonate is water soluble and its average molecular weight is 393.The blended system of bio-oil sulfonate and sodium carbonate has a wide range of interfacial activity and relatively good interfacial tension stability.The interfacial tension between oil and water can be reduced to 10^-3 mN/m when sodium carbonate is in the mass fraction range of 0.4%-0.8%.The minimum interfacial tension between crude oil and compounded solution decreases first and then increases with the increase of mass fraction of sodium carbonate.The optimum mass fraction of sodium carbonate is 0.6%.The minimum interfacial tension is still maintained at 10^-3 mN/m after 90 d.For a given mass fraction of sodium carbonate,the oil/water partition coefficient of bio-oil sulfonate is decreased as the mass fraction of bio-oil sulfonate increases.The decline of partition coefficient becomes smaller when the mass fraction of bio-oil sulfonate is greater than 0.25%.For a given mass fraction of bio-oil sulfonate,the oil/water partition coefficient of bio-oil sulfonate has a small increase with the increase of mass fraction of sodium carbonate.

Key words: bio-oil sulfonate, waste cooking oil, interfacial property, partition property

CLC Number:

TQ423

LONG Yun-qian, HUANG Xiao-he, WANG Yong-zheng, WANG Yong, SONG Xing-xing, SONG Fu-quan. Interfacial properties of compounded system of alkali and bio-oil sulfonate synthesized from waste cooking oil[J].China Surfactant Detergent & Cosmetics, 2018, 48(5): 266-271.

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Interfacial properties of compounded system of alkali and bio-oil sulfonate synthesized from waste cooking oil

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