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Palmitic acid sophorolipid biosurfactant : from self-assembled fibrillar network (SAFiN) to hydrogels with fast recovery

Author
Organization
Abstract
Nanofibres are an interesting phase into which amphiphilic molecules can self-assemble. Described for a large number of synthetic lipids, they were seldom reported for natural lipids like microbial amphiphiles, known as biosurfactants. In this work, we show that the palmitic acid congener of sophorolipids (SLC16:0), one of the most studied families of biosurfactants, spontaneously forms a self-assembled fibre network (SAFiN) at pH below 6 through a pH jump process. pH-resolved in situ small-angle X-ray scattering (SAXS) shows a continuous micelle-to-fibre transition, characterized by an enhanced core-shell contrast between pH 9 and pH 7 and micellar fusion into a flat membrane between pH 7 and pH 6, approximately. Below pH 6, homogeneous, infinitely long nanofibres form by peeling off the membranes. Eventually, the nanofibre network spontaneously forms a thixotropic hydrogel with fast recovery rates after applying an oscillatory strain amplitude out of the linear viscoelastic regime: after being submitted to strain amplitudes during 5 min, the hydrogel recovers about 80% and 100% of its initial elastic modulus after, respectively, 20 s and 10 min. Finally, the strength of the hydrogel depends on the medium's final pH, with an elastic modulus fivefold higher at pH 3 than at pH 6. This article is part of the theme issue 'Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 1)'.
Keywords
MECHANICAL-PROPERTIES, LAMELLAR HYDROGELS, GEL FORMATION, PH, PEPTIDE, MICELLES, WATER, BOLAAMPHIPHILES, MONODISPERSE, TEMPERATURE, biosurfactants, hydrogels, self-assembled fibrillar networks (SAFiN), small-angle X-ray scattering, sophorolipids, thixotropic

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MLA
Baccile, Niki, et al. “Palmitic Acid Sophorolipid Biosurfactant : From Self-Assembled Fibrillar Network (SAFiN) to Hydrogels with Fast Recovery.” PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, vol. 379, no. 2206, 2021, doi:10.1098/rsta.2020.0343.
APA
Baccile, N., Ben Messaoud, G., Le Griel, P., Cowieson, N., Perez, J., Geys, R., … Soetaert, W. (2021). Palmitic acid sophorolipid biosurfactant : from self-assembled fibrillar network (SAFiN) to hydrogels with fast recovery. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 379(2206). https://doi.org/10.1098/rsta.2020.0343
Chicago author-date
Baccile, Niki, Ghazi Ben Messaoud, Patrick Le Griel, Nathan Cowieson, Javier Perez, Robin Geys, Marilyn De Graeve, Sophie Roelants, and Wim Soetaert. 2021. “Palmitic Acid Sophorolipid Biosurfactant : From Self-Assembled Fibrillar Network (SAFiN) to Hydrogels with Fast Recovery.” PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 379 (2206). https://doi.org/10.1098/rsta.2020.0343.
Chicago author-date (all authors)
Baccile, Niki, Ghazi Ben Messaoud, Patrick Le Griel, Nathan Cowieson, Javier Perez, Robin Geys, Marilyn De Graeve, Sophie Roelants, and Wim Soetaert. 2021. “Palmitic Acid Sophorolipid Biosurfactant : From Self-Assembled Fibrillar Network (SAFiN) to Hydrogels with Fast Recovery.” PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 379 (2206). doi:10.1098/rsta.2020.0343.
Vancouver
1.
Baccile N, Ben Messaoud G, Le Griel P, Cowieson N, Perez J, Geys R, et al. Palmitic acid sophorolipid biosurfactant : from self-assembled fibrillar network (SAFiN) to hydrogels with fast recovery. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES. 2021;379(2206).
IEEE
[1]
N. Baccile et al., “Palmitic acid sophorolipid biosurfactant : from self-assembled fibrillar network (SAFiN) to hydrogels with fast recovery,” PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, vol. 379, no. 2206, 2021.
@article{8762518,
  abstract     = {{Nanofibres are an interesting phase into which amphiphilic molecules can self-assemble. Described for a large number of synthetic lipids, they were seldom reported for natural lipids like microbial amphiphiles, known as biosurfactants. In this work, we show that the palmitic acid congener of sophorolipids (SLC16:0), one of the most studied families of biosurfactants, spontaneously forms a self-assembled fibre network (SAFiN) at pH below 6 through a pH jump process. pH-resolved in situ small-angle X-ray scattering (SAXS) shows a continuous micelle-to-fibre transition, characterized by an enhanced core-shell contrast between pH 9 and pH 7 and micellar fusion into a flat membrane between pH 7 and pH 6, approximately. Below pH 6, homogeneous, infinitely long nanofibres form by peeling off the membranes. Eventually, the nanofibre network spontaneously forms a thixotropic hydrogel with fast recovery rates after applying an oscillatory strain amplitude out of the linear viscoelastic regime: after being submitted to strain amplitudes during 5 min, the hydrogel recovers about 80% and 100% of its initial elastic modulus after, respectively, 20 s and 10 min. Finally, the strength of the hydrogel depends on the medium's final pH, with an elastic modulus fivefold higher at pH 3 than at pH 6. This article is part of the theme issue 'Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 1)'.}},
  articleno    = {{20200343}},
  author       = {{Baccile, Niki and Ben Messaoud, Ghazi and Le Griel, Patrick and Cowieson, Nathan and Perez, Javier and Geys, Robin and De Graeve, Marilyn and Roelants, Sophie and Soetaert, Wim}},
  issn         = {{1364-503X}},
  journal      = {{PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES}},
  keywords     = {{MECHANICAL-PROPERTIES,LAMELLAR HYDROGELS,GEL FORMATION,PH,PEPTIDE,MICELLES,WATER,BOLAAMPHIPHILES,MONODISPERSE,TEMPERATURE,biosurfactants,hydrogels,self-assembled fibrillar networks (SAFiN),small-angle X-ray scattering,sophorolipids,thixotropic}},
  language     = {{eng}},
  number       = {{2206}},
  pages        = {{20}},
  title        = {{Palmitic acid sophorolipid biosurfactant : from self-assembled fibrillar network (SAFiN) to hydrogels with fast recovery}},
  url          = {{http://doi.org/10.1098/rsta.2020.0343}},
  volume       = {{379}},
  year         = {{2021}},
}

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