Comparative hydrodynamic characterisation of two hydroxylated polymers based on α-pinene- or oleic acid-derived monomers for potential use as archaeological consolidants
Abstract The Oseberg Viking ship burial is one of the most extensive collections of Viking wooden artefacts ever excavated in Norway. In the early twentieth century, many of these artefacts were treated with alum in order to preserve them, inadvertently leading to their current degraded state. It is...
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| Format: | Article |
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Nature Portfolio
2022-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-21027-4 |
| _version_ | 1798044364006490112 |
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| author | Michelle Cutajar Fabricio Machado Valentina Cuzzucoli Crucitti Susan Braovac Robert A. Stockman Steven M. Howdle Stephen E. Harding |
| author_facet | Michelle Cutajar Fabricio Machado Valentina Cuzzucoli Crucitti Susan Braovac Robert A. Stockman Steven M. Howdle Stephen E. Harding |
| author_sort | Michelle Cutajar |
| collection | DOAJ |
| description | Abstract The Oseberg Viking ship burial is one of the most extensive collections of Viking wooden artefacts ever excavated in Norway. In the early twentieth century, many of these artefacts were treated with alum in order to preserve them, inadvertently leading to their current degraded state. It is therefore crucial to develop new bioinspired polymers which could be used to conserve these artefacts and prevent further disintegration. Two hydroxylated polymers were synthesised (TPA6 and TPA7), using α-pinene- and oleic acid-derived monomers functionalised with an acrylate moiety. Characterisation using biomolecular hydrodynamics (analytical ultracentrifugation and high precision viscometry) has shown that these polymers have properties which would potentially make them good wood consolidants. Conformation analyses with the viscosity increment (ν) universal hydrodynamic parameter and ELLIPS1 software showed that both polymers had extended conformations, facilitating in situ networking when applied to wood. SEDFIT-MSTAR analyses of sedimentation equilibrium data indicates a weight average molar mass M w of (3.9 ± 0.8) kDa and (4.2 ± 0.2) kDa for TPA6 and TPA7 respectively. Analyses with SEDFIT (sedimentation velocity) and MultiSig however revealed that TPA7 had a much greater homogeneity and a lower proportion of aggregation. These studies suggest that both these polymers—particularly TPA7—have characteristics suitable for wood consolidation, such as an optimal molar mass, conformation and a hydroxylated nature, making them interesting leads for further research. |
| first_indexed | 2024-04-11T23:02:39Z |
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| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T23:02:39Z |
| publishDate | 2022-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-5c57dc9c119e47d99afd1e3dcfc0b3122022-12-22T03:58:05ZengNature PortfolioScientific Reports2045-23222022-11-0112111410.1038/s41598-022-21027-4Comparative hydrodynamic characterisation of two hydroxylated polymers based on α-pinene- or oleic acid-derived monomers for potential use as archaeological consolidantsMichelle Cutajar0Fabricio Machado1Valentina Cuzzucoli Crucitti2Susan Braovac3Robert A. Stockman4Steven M. Howdle5Stephen E. Harding6School of Biosciences, National Centre for Macromolecular Hydrodynamics (NCMH), University of NottinghamSchool of Chemistry, University of NottinghamCentre for Additive Manufacturing, Department of Chemical and Environmental Engineering, Faculty of Engineering, University of NottinghamMuseum of Cultural History, University of OsloSchool of Chemistry, University of NottinghamSchool of Chemistry, University of NottinghamSchool of Biosciences, National Centre for Macromolecular Hydrodynamics (NCMH), University of NottinghamAbstract The Oseberg Viking ship burial is one of the most extensive collections of Viking wooden artefacts ever excavated in Norway. In the early twentieth century, many of these artefacts were treated with alum in order to preserve them, inadvertently leading to their current degraded state. It is therefore crucial to develop new bioinspired polymers which could be used to conserve these artefacts and prevent further disintegration. Two hydroxylated polymers were synthesised (TPA6 and TPA7), using α-pinene- and oleic acid-derived monomers functionalised with an acrylate moiety. Characterisation using biomolecular hydrodynamics (analytical ultracentrifugation and high precision viscometry) has shown that these polymers have properties which would potentially make them good wood consolidants. Conformation analyses with the viscosity increment (ν) universal hydrodynamic parameter and ELLIPS1 software showed that both polymers had extended conformations, facilitating in situ networking when applied to wood. SEDFIT-MSTAR analyses of sedimentation equilibrium data indicates a weight average molar mass M w of (3.9 ± 0.8) kDa and (4.2 ± 0.2) kDa for TPA6 and TPA7 respectively. Analyses with SEDFIT (sedimentation velocity) and MultiSig however revealed that TPA7 had a much greater homogeneity and a lower proportion of aggregation. These studies suggest that both these polymers—particularly TPA7—have characteristics suitable for wood consolidation, such as an optimal molar mass, conformation and a hydroxylated nature, making them interesting leads for further research.https://doi.org/10.1038/s41598-022-21027-4 |
| spellingShingle | Michelle Cutajar Fabricio Machado Valentina Cuzzucoli Crucitti Susan Braovac Robert A. Stockman Steven M. Howdle Stephen E. Harding Comparative hydrodynamic characterisation of two hydroxylated polymers based on α-pinene- or oleic acid-derived monomers for potential use as archaeological consolidants Scientific Reports |
| title | Comparative hydrodynamic characterisation of two hydroxylated polymers based on α-pinene- or oleic acid-derived monomers for potential use as archaeological consolidants |
| title_full | Comparative hydrodynamic characterisation of two hydroxylated polymers based on α-pinene- or oleic acid-derived monomers for potential use as archaeological consolidants |
| title_fullStr | Comparative hydrodynamic characterisation of two hydroxylated polymers based on α-pinene- or oleic acid-derived monomers for potential use as archaeological consolidants |
| title_full_unstemmed | Comparative hydrodynamic characterisation of two hydroxylated polymers based on α-pinene- or oleic acid-derived monomers for potential use as archaeological consolidants |
| title_short | Comparative hydrodynamic characterisation of two hydroxylated polymers based on α-pinene- or oleic acid-derived monomers for potential use as archaeological consolidants |
| title_sort | comparative hydrodynamic characterisation of two hydroxylated polymers based on α pinene or oleic acid derived monomers for potential use as archaeological consolidants |
| url | https://doi.org/10.1038/s41598-022-21027-4 |
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