Cationic surfactant-induced instantaneous gelation of silk fibroin solution

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Abstract

Modern traumatic wound-care products have several associated disadvantages. They do not meet requirements because they lack good permeability, biocompatibility and air tightness. In an attempt to overcome these shortcomings, a new type of flexible, instantaneously-formed hydrogels resulting from blending silk fibroin and cationic surfactants with different carbon chains are introduced in this work. The secondary structure of these hydrogels is similar to that of a silk fibroin solution as they primarily consist of random coils. However, the structure is different from a pure silk fibroin hydrogel which primarily consists of β-sheet structure. By means of SEM, silk fibroin molecules form clustered nanofilaments during the cationic surfactant-induced hydrogelation, which is different from a pure silk fibroin hydrogel that is composed of a porous network structure. The charge effect, hydrophobic effect and surface tension are presumed to be related to the formation of the cationic surfactant/silk fibroin hydrogels.

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Lu, S., Sun, S., Zhang, F., Li, J., Xing, T., & Jin, J. (2014). Cationic surfactant-induced instantaneous gelation of silk fibroin solution. In Asian Journal of Chemistry (Vol. 26, pp. 5667–5672). Chemical Publishing Co. https://doi.org/10.14233/ajchem.2014.18180

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