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Complex coacervation of natural sophorolipid bolaamphiphile micelles with cationic polyelectrolytes
Green Chemistry ( IF 9.3 ) Pub Date : 2018-06-29 , DOI: 10.1039/c8gc01531g Ghazi Ben Messaoud 1, 2, 3, 4, 5 , Lyndsay Promeneur 1, 2, 3, 4, 5 , Martha Brennich 6, 7, 8, 9 , Sophie L. K. W. Roelants 10, 11, 12, 13, 14 , Patrick Le Griel 1, 2, 3, 4, 5 , Niki Baccile 1, 2, 3, 4, 5
Green Chemistry ( IF 9.3 ) Pub Date : 2018-06-29 , DOI: 10.1039/c8gc01531g Ghazi Ben Messaoud 1, 2, 3, 4, 5 , Lyndsay Promeneur 1, 2, 3, 4, 5 , Martha Brennich 6, 7, 8, 9 , Sophie L. K. W. Roelants 10, 11, 12, 13, 14 , Patrick Le Griel 1, 2, 3, 4, 5 , Niki Baccile 1, 2, 3, 4, 5
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Complex coacervation of polyelectrolytes with surfactant micelles is a promising system for a wide range of applications. However, the development of “green coacervates” from bio-based surfactants and biopolymers has not yet been explored. Herein, complex coacervation of micelles from a bolaform sophorolipid biosurfactant with oppositely charged cationic polyelectrolytes (i.e., chitosan oligosaccharide lactate, poly (L-lysine) and poly(allylamine)) was investigated. Turbidity titration, light and scanning electron microscopy (SEM), dynamic light scattering (DLS), cryogenic transmission electron microscopy (cryo-TEM) and Small Angle X-ray Scattering (SAXS) were used to monitor the evolution of complex structures as a function of pH and polyelectrolyte concentration. Phase boundaries of the biosurfactant–polyelectrolyte systems were obtained and these revealed the feasibility of coacervation in water over a broad range of pH, from 5 to 9. The state of complexation was found to depend primarily on pH and concentration and the nature of the polyelectrolyte. Light microscopy and SEM demonstrated the associative macrophase separation, and cryo-TEM highlighted the influence of the desolvation level on the coacervate arrangement where two main structures were formed as a function of the coacervation stage, namely spherical particles and aggregates. The SAXS data demonstrated that the sophorolipid micelles maintained their structure integrity following their binding to the cationic polyelectrolyte.
中文翻译：
天然槐糖脂双亲胶束与阳离子聚电解质的复合凝聚
聚电解质与表面活性剂胶束的复合凝聚是一种有广泛应用前景的系统。然而，尚未探索由生物基表面活性剂和生物聚合物开发的“绿色凝聚层”。本文中，来自呈球形的槐糖脂生物表面活性剂与相反带电荷的阳离子聚电解质（即，壳聚糖低聚糖乳酸，聚（L-赖氨酸）和聚（烯丙胺）进行了研究。使用浊度滴定，光和扫描电子显微镜（SEM），动态光散射（DLS），低温透射电子显微镜（cryo-TEM）和小角X射线散射（SAXS）来监测复杂结构作为函数的演变pH和聚电解质浓度。获得了生物表面活性剂-聚电解质体系的相界，这揭示了在5至9的广泛pH范围内在水中凝聚的可行性。发现络合状态主要取决于pH和浓度以及聚电解质的性质。 。光学显微镜和SEM证实了相关的宏观相分离，cryo-TEM强调了去溶剂化水平对凝聚排列的影响，在凝聚排列中，两个主要结构是凝聚阶段的函数，即球形颗粒和聚集体。SAXS数据表明，槐糖脂胶束在与阳离子聚电解质结合后仍保持其结构完整性。
更新日期：2018-07-16
中文翻译：
天然槐糖脂双亲胶束与阳离子聚电解质的复合凝聚
聚电解质与表面活性剂胶束的复合凝聚是一种有广泛应用前景的系统。然而，尚未探索由生物基表面活性剂和生物聚合物开发的“绿色凝聚层”。本文中，来自呈球形的槐糖脂生物表面活性剂与相反带电荷的阳离子聚电解质（即，壳聚糖低聚糖乳酸，聚（L-赖氨酸）和聚（烯丙胺）进行了研究。使用浊度滴定，光和扫描电子显微镜（SEM），动态光散射（DLS），低温透射电子显微镜（cryo-TEM）和小角X射线散射（SAXS）来监测复杂结构作为函数的演变pH和聚电解质浓度。获得了生物表面活性剂-聚电解质体系的相界，这揭示了在5至9的广泛pH范围内在水中凝聚的可行性。发现络合状态主要取决于pH和浓度以及聚电解质的性质。 。光学显微镜和SEM证实了相关的宏观相分离，cryo-TEM强调了去溶剂化水平对凝聚排列的影响，在凝聚排列中，两个主要结构是凝聚阶段的函数，即球形颗粒和聚集体。SAXS数据表明，槐糖脂胶束在与阳离子聚电解质结合后仍保持其结构完整性。
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