Low molecular weight gelators based on biosurfactants, cellobiose lipids by Cryptococcus humicola.
Low molecular weight gelators based on biosurfactants, cellobiose lipids by Cryptococcus humicola.
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基于生物表面活性剂、腐殖质隐球菌的纤维二糖脂质的低分子量胶凝剂。
DOI：
10.5650/jos.61.659
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发表时间：
2012
影响因子：
1.5
通讯作者：
D. Kitamoto
中科院分区：
文献类型：
--
作者：
T. Imura;D. Kawamura;Yuko Ishibashi;Tomotake Morita;Shun Sato;T. Fukuoka;Y. Kikkawa;D. Kitamoto
纤维二糖脂类(CLS)是一种糖脂生物表面活性剂，由酵母菌从天然资源中产生，具有杀菌活性。本研究采用流变学和原子力显微镜(AFM)等技术研究了CL在溶剂中的凝胶化特性。酵母菌CL在26种溶剂中有6种凝胶化。虽然它没有提供广泛用于化妆品行业的乙醇或1，3-丁二醇凝胶，但我们成功地将乙醇或1，3-丁二醇与水混合制成凝胶。原子力显微镜观察硅衬底上的凝胶提供了具有缠绕纤维网络的3D超分子结构。此外，还发现一些纤维结构为扭曲的螺旋带。这应该是由于纤维二糖主链具有几个手性官能团。凝胶在乙醇/水和1，3-丁二醇/水混合体系中的溶胶-凝胶相变温度均在100℃以下，说明凝胶的制备条件较温和。本发明的化学发光凝胶可用于各种工业领域的新型多功能材料。
Cellobiose lipids (CLs) are bolaform glycolipid biosurfactants, which are produced from natural resources by a yeast strain and show fungicidal activity. In this study, the gelation properties of CL in solvents were investigated by several techniques including rheology and atomic force microscopy (AFM). The yeast CL was found to gelate 6 out of 26 solvents. Although it did not provide gels in ethanol or 1, 3-butanediol which are widely used for cosmetic industries, we succeeded in producing gels by mixing ethanol or 1, 3-butanediol with water. AFM observation of the gels on a silicon substrate provided 3D supramolecular structures with an entangled fibrous network. Moreover, it was also found that some of fibrous structures were twisted helical ribbons. This should be due to the cellobiose backbone having several chiral functional groups. The sol-gel phase transition temperatures for gels in mixed ethanol/water and 1, 3-butanediol/water systems were below 100°C, indicating that the gels can be obtained with rather mild preparation conditions. The present CL gels would be useful for novel multifunctional materials applicable to various industries.