Influence of hydrogel coatings on corrosion and fatigue of iron in simulated body fluid

Huang, Jingyuan; Voigt, Markus; Wackenrohr, Steffen; Ebbert, Christoph; Keller, Adrian; Maier, Hans Jürgen; Grundmeier, Guido

doi:10.1002/maco.202112841

Cited by 2 publications

(3 citation statements)

References 46 publications

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“…The obtained agar spectra displayed the typical vibrational bands of polysaccharides originated from red seaweed (Figure 8, orange spectrum). Bands at 3289 cm −1 and 2923 cm −1 are assigned to the stretching modes of OH and CH, respectively [55,66,67]. The band at 1634 cm −1 is attributed to the OH bending mode of water remaining in the gel, although it was dried [55,66].…”

Section: Atr-ftir Spectroscopy Agarmentioning

confidence: 99%

“…Bands at 3289 cm −1 and 2923 cm −1 are assigned to the stretching modes of OH and CH, respectively [55,66,67]. The band at 1634 cm −1 is attributed to the OH bending mode of water remaining in the gel, although it was dried [55,66]. The peak at 1373 cm −1 is assigned to ester sulfate [55].…”

Section: Atr-ftir Spectroscopy Agarmentioning

confidence: 99%

“…The band at 1250 cm −1 stands for the S==O stretching mode [70]. The peaks observed at 1063 and 931 cm −1 are characteristic vibrational bands of 3,6-anhydro-galactose, corresponding to the glycosidic bond and the C-O-C bridge, respectively [55,66,67]. Bands between 800 and 900 cm −1 are characteristics of 3,6-anhydro-galactose network [66,70].…”

Section: Atr-ftir Spectroscopy Agarmentioning

confidence: 99%

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Agar and Chitosan Hydrogels’ Design for Metal-Uptaking Treatments

Cuvillier,

Passaretti,

Guilminot

et al. 2024

Gels

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In the field of cultural heritage, the use of natural gels is rising for the application of active agents. Here, two natural polymers are assessed: agar, a pioneer hydrogel for conservation treatments, and chitosan, a rather novel and metal-binding gel. For chitosan, a state-of-the-art based formulation (CS–ItA–LCys) is evaluated as it was reported for silver-complexing properties. It is evaluated whether these polymers can withstand the addition of the chelating compound deferoxamine, which is a bacterial siderophore. This allows for the obtainment of completely bio-sourced gel systems. A Fourier-transformed (FT) infrared spectroscopy characterization is performed, completed with rheological measurements and Cryo-Scanning Electron Microscopy (cryo–SEM) to investigate the physico–chemical properties of the gels, as well as their interaction with deferoxamine. Both polymers are also tested for their inherent complexing ability on silver ions using FT–Raman spectroscopy. A multi-analytical comparison shows different microstructures, in particular, the presence of a thick membrane for chitosan and different mechanical behaviors, with agar being more brittle. Neither hydrogel seems affected by the addition of deferoxamine; this is shown by similar rheological behavior and molecular structures in the presence or absence of the chelator. The intrinsic abilities of the chitosan formulation to make silver complex are demonstrated with the observation of two peaks characteristic of Ag–S and Ag–O bonds. Agar and chitosan are both proven to be reliable gels to act as carriers for bio-based active agents. This paper confirms the potential asset of the chitosan formulation CS–ItA–LCys as a promising gel for the complexation of soluble silver.

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Section: Atr-ftir Spectroscopy Agarmentioning

confidence: 99%

Section: Atr-ftir Spectroscopy Agarmentioning

confidence: 99%

Section: Atr-ftir Spectroscopy Agarmentioning

confidence: 99%

See 1 more Smart Citation

Agar and Chitosan Hydrogels’ Design for Metal-Uptaking Treatments

Cuvillier,

Passaretti,

Guilminot

et al. 2024

Gels

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Corrosion fatigue behavior of nanoparticle modified iron processed by electron powder bed fusion

Wackenrohr,

Torrent,

Herbst

et al. 2024

npj Mater Degrad

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Due to its excellent biocompatibility, pure iron is a very promising implant material, but often features corrosion rates that are too low. Using additive manufacturing and modified powders the microstructure and, thus, the material properties, e.g., the corrosion properties, can be tailored for specific applications. Within the scope of this study, pure iron powder was modified with different amounts of CeO2 or Fe2O3 nanoparticles and subsequently processed by Electron Beam Powder Bed Fusion (PBF-EB/M). The corrosion-fatigue behavior of CeO2 and Fe2O3 modified iron was investigated using rotation bending tests under the influence of simulated body fluid (m-SBF). While the modification using Fe2O3 showed reduced fatigue and corrosion-fatigue strengths, it could be demonstrated that the modification with CeO2 is characterized by improved fatigue properties. The superior fatigue properties in air are attributed to the positive impact of dispersion strengthening. Additionally, an increased degradation rate compared to pure iron could be observed, eventually promoting an earlier failure of the specimens in the corrosion fatigue tests.

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Influence of hydrogel coatings on corrosion and fatigue of iron in simulated body fluid

Cited by 2 publications

References 46 publications

Agar and Chitosan Hydrogels’ Design for Metal-Uptaking Treatments

Agar and Chitosan Hydrogels’ Design for Metal-Uptaking Treatments

Corrosion fatigue behavior of nanoparticle modified iron processed by electron powder bed fusion

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