Physical and mechanical properties of waterlogged wood treated with hydrolyzed feather keratin

Endo, Rie; Kamei, Kaeko; Iida, Ikuho; Yokoyama, M.; Kawahara, Yutaka

doi:10.1016/j.jas.2009.12.034

Cited by 24 publications

(15 citation statements)

References 6 publications

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“…The low-molecular weight of keratin resulted in its fast diffusion into the WW. The color of the keratin-treated wood was quite similar to that of normal wood [23]. Additionally, feather keratin-treated wood had antimicrobial activity.…”

Section: Introductionmentioning

confidence: 73%

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Evaluation of chemical treatments on dimensional stabilization of archeological waterlogged hardwoods obtained from the Thang Long Imperial Citadel site, Vietnam

et al. 2018

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In this article, the conservation of seven archeological waterlogged woods (WW) with polyethylene glycol (PEG) 4000, trehalose, and feather keratin was investigated. The results showed that the dimensional stability of WWs significantly improved after the different treatments. The anti-shrink efficiency values of the WWs treated with keratin ranged between 72.5 and 96.2% depending on the species and degree of wood degradation. These values varied from 82.4 to 96.9% for the WWs treated with PEG or trehalose. Microscopic observations showed that the chemically-treated woods maintained their original cell structures, forms, and shapes. It was also revealed that the reinforcement of cell walls by the feather keratin treatment was different from those observed for the PEG or trehalose treatments. It was observed that PEG and trehalose primarily filled the wood voids, while keratin predominantly absorbed on the cell walls and middle lamellae. Based on the improved dimensional stability of wood, shortened impregnation time, removability of chemical, and esthetic results obtained from the treatment, keratin showed a good performance in average as a preservation agent.

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Section: Introductionmentioning

confidence: 73%

“…The dimensional stability of the WW treated with keratin was excellent [17,18], except for the experiment on heavily degraded wood [22]. The treatment involving feather keratin enhanced the mechanical properties of WW [23]. The low-molecular weight of keratin resulted in its fast diffusion into the WW.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of chemical treatments on dimensional stabilization of archeological waterlogged hardwoods obtained from the Thang Long Imperial Citadel site, Vietnam

et al. 2018

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“…The stabilisation mechanism of keratin is different from PEG [207]. Solid keratin substance has a density similar to the density of the cell wall material (about 1569 kg m −3 ).…”

Section: Proteinsmentioning

confidence: 98%

“…Its molecules are small enough to quickly diffuse into the wooden tissue and penetrate the cell wall. Keratin adsorbs on the middle lamella, thus reinforcing the cell wall structure and preventing its collapse [198,204,205,207,208]. The remaining open-cell lumina allow for potential retreatment of the samples if necessary [198,207].…”

Section: Proteinsmentioning

confidence: 99%

Conservation of Waterlogged Wood—Past, Present and Future Perspectives

Broda

Hill

2021

Forests

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This paper reviews the degradation, preservation and conservation of waterlogged archaeological wood. Degradation due to bacteria in anoxic and soft-rot fungi and bacteria in oxic waterlogged conditions is discussed with consideration of the effect on the chemical composition of wood, as well as the deposition of sulphur and iron within the structure. The effects on physical properties are also considered. The paper then discusses the role of consolidants in preserving waterlogged archaeological wood after it is excavated as well as issues to be considered when reburial is used as a means of preservation. The use of alum and polyethylene glycol (PEG) as consolidants is presented along with various case studies with particular emphasis on marine artefacts. The properties of consolidated wood are examined, especially with respect to the degradation of the wood post-conservation. Different consolidants are reviewed along with their use and properties. The merits and risks of reburial and in situ preservation are considered as an alternative to conservation.

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“…al., 1984;Molin et. al., 1988), by soaking them (Endo et. al., 2010) and using fi nishing materials of different properties.…”

Section: Uvodmentioning

confidence: 99%

Influence of Finishing Materials on Viscous Elastic Properties of Wooden Structures

et al. 2019

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In this study, the effect of finishing process on the mechanical properties of oak and pine wood elements were investigated. A special test stand was used for this purpose. Specimens were divided into subgroups, the resonance frequency of the specimens was determined (when they vibrate in mode of a theoretic isotope beam), and the modulus of elasticity (MOE) and damping coefficient were estimated. It was determined that MOE of oak and pine specimens was 8415-10570 MPa and 8220-14104 MPa, respectively, while damping coefficients were 0.014-0.019 r. u. and 0.013-0.026. Afterwards, some specimens were varnished (pentaftal varnish was used), while the specimens from others subgroups were oiled (water-based outdoor wood oil was used) and after each processing step, the viscous elastic properties of the specimen were recorded. The specimens were finished four times – first, one side was finished in two layers, and then the other side. For the determination of elastic properties of the finishing materials, films were prepared separately. The fi lm formation was carried out by casting liquid on a smooth, siliconised surface of a test panel. The tensile test was carried out using the universal testing machine. It was established that MOE of films varied in the range of 4-7 MPa. After the varnishing process, the MOE of oak and pine elements decreased by 5 % and 7 %, respectively, while the damping coefficient decreased (in varnish case) by 60 %. The impact of oil on viscous elastic properties of the specimens was quite marginal.

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Physical and mechanical properties of waterlogged wood treated with hydrolyzed feather keratin

Cited by 24 publications

References 6 publications

Evaluation of chemical treatments on dimensional stabilization of archeological waterlogged hardwoods obtained from the Thang Long Imperial Citadel site, Vietnam

Evaluation of chemical treatments on dimensional stabilization of archeological waterlogged hardwoods obtained from the Thang Long Imperial Citadel site, Vietnam

Conservation of Waterlogged Wood—Past, Present and Future Perspectives

Influence of Finishing Materials on Viscous Elastic Properties of Wooden Structures

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