The self-assembly of α-cyclodextrin (α-CD) mixed with a fluorocarbon surfactant, perfluorononanoic acid (PFNA), in aqueous solution was studied. Interestingly, the 1:1 inclusion complex, PFNA@α-CD, was verified to form by 1H nuclear magnetic resonance measurement. Also as the building block, the PFNA@α-CD complex was further self-assembled into worm-like micelles under lower concentrations while hydrogels were self-assembled under higher concentrations. The hydrogels were composed of unilamellar vesicles with polydisperse size, which were clearly detected by freeze-fracture transmission electron microscopy measurements. Besides, the vesicle hydrogels showed high viscoelasticities and a substantial elastic characteristic. Also as revealed by the results of Fourier transform infrared measurements, the driving force for the vesicle and worm-like micelle formation was the hydrogen bonding between α-CD molecules. Then, these vesicles were densely packed to form hydrogels. As far as we know, the self-assembly of CDs and fluorocarbon surfactants based on host-guest inclusion in aqueous solution has been limitedly reported. Our work successfully constructed hydrogels consisting of vesicles through the self-assembly of the α-CD/PFNA complex for the first time and will also provide a better understanding and enrich the fundamental research of the self-assembly behavior of the CD/fluorosurfactant complex.

中文翻译：

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由自α-环糊精和全氟壬酸形成的超分子复合物的自组装构成的囊泡组成的水凝胶。

研究了与氟碳表面活性剂全氟壬酸（PFNA）混合的α-环糊精（α-CD）在水溶液中的自组装。有趣的是，通过1H核磁共振测量证实了1：1包合物PFNA @α-CD。PFNA @α-CD复合物也可以作为构建基块，在较低浓度下进一步自组装成蠕虫状胶束，而在较高浓度下将水凝胶进行自组装。水凝胶由具有多分散尺寸的单层囊泡组成，通过冷冻断裂透射电子显微镜测量可以清楚地检测到。此外，囊泡水凝胶显示出高的粘弹性和显着的弹性特征。傅立叶变换红外测量的结果也表明，囊泡和蠕虫状胶束形成的驱动力是α-CD分子之间的氢键。然后，将这些囊泡密集地包装以形成水凝胶。据我们所知，已经报道了基于宿主-客体包含在水溶液中的CD和碳氟化合物表面活性剂的自组装。我们的工作首次通过α-CD/ PFNA复合物的自组装成功地构建了由囊泡组成的水凝胶，并且还将提供更好的理解并丰富CD /含氟表面活性剂复合物自组装行为的基础研究。有限地报道了基于客体-客体包含的CD和碳氟化合物表面活性剂的自组装。我们的工作首次通过α-CD/ PFNA复合物的自组装成功地构建了由囊泡组成的水凝胶，并且还将提供更好的理解并丰富CD /含氟表面活性剂复合物自组装行为的基础研究。有限地报道了基于客体-客体包含的CD和碳氟化合物表面活性剂的自组装。我们的工作首次通过α-CD/ PFNA复合物的自组装成功地构建了由囊泡组成的水凝胶，并且还将提供更好的理解并丰富CD /含氟表面活性剂复合物自组装行为的基础研究。