The risk of liquid wood degradation under the influence of marine factors

Barhalescu, Mihaela Luminita; Ghiță, Simona; Petrescu, Tudor-Cristian

doi:10.1051/matecconf/201929012012

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…Only two investigations about the effect of humidity on Arboblend V2 Nature biopolymers have shown that the material adsorbs up to 6% of water (55) and that Arboblend V2 Nature does not contain -OH functions and only very small or no aromatic functions (14). Our results indicate that Arboblend V2 Nature behaves like other fossil-based thermoplastics, with more friction at 0% RH than at 33% RH.…”

Section: Influence Of Ambient Humiditymentioning

confidence: 99%

Tribological and nanomechanical properties of a lignin-based biopolymer

Broitman¹,

Nedelcu

Mazurchevici

2020

E-Polymers

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A research is reported on the nanomechanics and tribology of the Arboblend V2 Nature biopolymer (a 100% bio-based material, biodegradable, or resistant depending of application), being a mixture of different biopolymers such as lignin, polylactic acid, cellulose, biopolyamides, and other natural additives. The specimens were made by an industrial-scale injection molding machine. The nanoindentation characterization have unveiled that an increase in processing temperature from 160°C to 170°C produces a rise in hardness and elastic modulus of ∼20%. Tribological characterization against a bearing-steel counterface has shown that for both processing temperatures, the increase of the applied load or the increase of sliding speed will produce an increase of the friction coefficient (µ) and wear. At an applied load of 1 N (contact pressure of 104 MPa) and tracks in a direction perpendicular to the surface textured lines, the lowest µ ∼ 0.148 are for samples made T = 170°C, while for tracks parallel to the textured lines, the lowest µ ∼ 0.059 is obtained for samples made at T = 160°C. Experiments made at different ambient humidity have established that friction coefficient is higher at 0% RH or at 75% RH than at 33% RH. Our results show that the biopolymers Arboblend V2 Nature is a candidate to substitute some popular fossil-based thermoplastics in numerous tribological industrial applications.

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Section: Influence Of Ambient Humiditymentioning

confidence: 99%

Tribological and nanomechanical properties of a lignin-based biopolymer

Broitman¹,

Nedelcu

Mazurchevici

2020

E-Polymers

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“…It was discovered that “liquid wood” is selective with respect to the absorbed substances and the biofilm developed on the surfaces of samples depends on the surface characteristics. As such, structural degradation is likely to occur and, if “liquid wood” is to be employed in such environments, protection (for example with bactericidal coatings) is recommended [ 50 ]. Acidic/Base/UV testing—A rather comprehensive testing of all three presentation forms of “liquid wood”, immersed in water at different temperatures and in the presence of acidic, base and UV environments was carried out.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Complex Behavior in the Dynamics of a Polymeric Biocomposite Material—“Liquid Wood”. Experimental and Theoretical Aspects

et al. 2021

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The purpose of the present paper is to analyze, both experimentally and theoretically, the behavior of the polymeric biocomposite generically known as “liquid wood”, trademarked as Arbofill. The experimental part refers to the mechanical performance in tension and compression, having as finality the possibility of using “liquid wood” as a material suitable for the rehabilitation of degraded wooden elements in civil structures (ex. use in historical buildings, monuments etc.,). The theoretical part refers to computer simulations regarding the mechanical behavior of “liquid wood” as well as to a theoretical model in the paradigm of motion, which describes the same behavior. This model is based on the hypothesis that “liquid wood” can be assimilated, both structurally and functionally, to a multifractal object, situation in which its entities are described through continuous, non-differentiable curves. Then, descriptions of the behavior of “liquid wood”, both in the Schrödinger-type and in hydrodynamic-type representations at various scale resolutions, become operational. Since in the hydrodynamic-type representation, the constitutive law of “liquid wood” can be highlighted, several operational procedures (Ricatti-type gauge, differential geometry in absolute space etc.,) will allow correlations between the present proposed model and the experimental data. The obtained results, both practical (81% bearing capacity in compression and 36% bearing capacity in tension, compared to control samples) and theoretical (validation of material performance in virtual environment simulations, stresses and strains correlations in a theoretical model) indicate that “liquid wood” could be used in the construction industry, as a potential rehabilitation material, but with more development clearly needed.

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The risk of liquid wood degradation under the influence of marine factors

Cited by 2 publications

References 7 publications

Tribological and nanomechanical properties of a lignin-based biopolymer

Tribological and nanomechanical properties of a lignin-based biopolymer

Complex Behavior in the Dynamics of a Polymeric Biocomposite Material—“Liquid Wood”. Experimental and Theoretical Aspects

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