水-生物乙醇混合物中鼠李糖脂的表面和聚集特性:向绿色配方设计迈进

Surfaces Pub Date : 2024-04-07 DOI:10.3390/surfaces7020017
R. Esposito, F. Taddeo, V. Russo, I. Russo Krauss, G. D’Errico
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引用次数: 0

摘要

水乙醇混合物被广泛应用于从工业加工到药物制剂等许多不同领域。为了调整其界面特性,通常会添加表面活性剂。出于可持续发展的考虑,需要重新设计此类混合物,以尽量减少其对环境的影响。一种成功的方法是用负担得起的未净化生物衍生替代品取代合成油基成分。在这方面,我们对通过藻类发酵获得的生物乙醇和微生物源生物表面活性剂鼠李糖脂的水性混合物进行了表征。水-生物乙醇二元混合物在折射率、密度、粘度和表面张力方面的物理化学特征表明,生物乙醇的表现与纯乙醇相似,杂质的影响可以忽略不计。张力滴定分析表明,当生物乙醇的含量高于 20-30% 时,鼠李糖脂的聚集会受到影响,而水气界面的表面吸附力则不会受到太大影响。总之,在生态可持续配方中,生物衍生成分有望成为石油衍生化学品的替代品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Surface and Aggregation Properties of Rhamnolipids in Water–Bioethanol Mixtures: A Step toward Green Formulation Design
Water–ethanol mixtures are largely exploited for many different applications, from industrial processes to pharmaceutical formulations. Surfactants are often added to tune their interfacial properties. Sustainability concerns require redesigning such blends to minimize their environmental impact. A successful approach is to replace synthetic oil-based components with affordable unpurified bio-derived alternatives. In this respect, we have characterized aqueous mixtures of bioethanol, obtained by the fermentation of algae, and rhamnolipids, biosurfactants of microbial origin. The physico-chemical characterization of water–bioethanol binary mixtures in terms of refractive index, density, viscosity, and surface tension indicates that bioethanol behaves like pure ethanol with negligible effects of impurities. Analysis of tensiometric titrations shows that, at bioethanol contents higher than 20–30% bioethanol mass percent, rhamnolipid aggregation is impaired, whereas surface adsorption at the water–air interface remains poorly affected. Overall, bio-derived components can be proposed as a promising alternative to oil-derived chemicals in eco-sustainable formulations.
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CiteScore
4.40
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