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Biosurfactants, natural alternatives to synthetic surfactants: Physicochemical properties and applications.
Advances in Colloid and Interface Science ( IF 15.9 ) Pub Date : 2019-11-09 , DOI: 10.1016/j.cis.2019.102061
Ruksana Jahan 1 , Andrew M Bodratti 1 , Marina Tsianou 1 , Paschalis Alexandridis 1
Affiliation  

Biosurfactants comprise a wide array of amphiphilic molecules synthesized by plants, animals, and microbes. The synthesis route dictates their molecular characteristics, leading to broad structural diversity and ensuing functional properties. We focus here on low molecular weight (LMW) and high molecular weight (HMW) biosurfactants of microbial origin. These are environmentally safe and biodegradable, making them attractive candidates for applications spanning cosmetics to oil recovery. Biosurfactants spontaneously adsorb at various interfaces and self-assemble in aqueous solution, resulting in useful physicochemical properties such as decreased surface and interfacial tension, low critical micellization concentrations (CMCs), and ability to solubilize hydrophobic compounds. This review highlights the relationships between biosurfactant molecular composition, structure, and their interfacial behavior. It also describes how environmental factors such as temperature, pH, and ionic strength can impact physicochemical properties and self-assembly behavior of biosurfactant-containing solutions and dispersions. Comparison between biosurfactants and their synthetic counterparts are drawn to illustrate differences in their structure-property relationships and potential benefits. Knowledge of biosurfactant properties organized along these lines is useful for those seeking to formulate so-called green or natural products with novel and useful properties.

中文翻译:

生物表面活性剂,合成表面活性剂的天然替代品:物理化学性质和应用。

生物表面活性剂包含由植物,动物和微生物合成的各种两亲分子。合成路线决定了它们的分子特性,从而导致广泛的结构多样性和随之而来的功能特性。在此,我们重点介绍微生物来源的低分子量(LMW)和高分子量(HMW)生物表面活性剂。这些产品对环境安全且可生物降解,使其成为从化妆品到石油回收的有吸引力的候选产品。生物表面活性剂会自发地吸附在各种界面上并在水溶液中自组装,从而产生有用的物理化学特性,例如降低的表面和界面张力,低的临界胶束浓度(CMC)以及溶解疏水化合物的能力。这篇综述强调了生物表面活性剂分子组成,结构及其界面行为之间的关系。它还描述了环境因素(例如温度,pH和离子强度)如何影响含生物表面活性剂的溶液和分散体的理化性质和自组装行为。比较了生物表面活性剂和合成表面活性剂之间的差异,以说明它们在结构-性质关系和潜在收益方面的差异。沿着这些思路组织的生物表面活性剂特性的知识对于那些试图配制具有新颖有用特性的所谓绿色或天然产品的人很有用。离子强度会影响含生物表面活性剂的溶液和分散液的理化性质和自组装行为。比较了生物表面活性剂和合成表面活性剂之间的差异,以说明它们在结构-性质关系和潜在收益方面的差异。沿着这些思路组织的生物表面活性剂特性的知识对于那些试图配制具有新颖有用特性的所谓绿色或天然产品的人很有用。离子强度会影响含生物表面活性剂的溶液和分散液的理化性质和自组装行为。比较了生物表面活性剂和合成表面活性剂之间的差异,以说明它们在结构-性质关系和潜在收益方面的差异。沿着这些思路组织的生物表面活性剂特性的知识对于那些试图配制具有新颖有用特性的所谓绿色或天然产品的人很有用。
更新日期:2019-11-11
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