Effect of Migration Structure on Tensile Strength of a Natural Fiber Twisted Yarn and Markov Chain Simulation

Hironaka, Y; Yamasaki, Eri; Goda, Koichi

doi:10.2115/fiberst.2017-0038

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…For this sol-gel transition, the storage modulus G′ of the system increases by several orders of magnitude. Similar behavior is observed when multivalent metal ions, such as Ca 2+ and Al 3+ , are added into the system (Goi et al, 2018). The inter-CNF interactions are dominated by ionic bonds in this case, such that the resulting hydrogels are thereby stiffer than the acid-type gels.…”

Section: Resultssupporting

confidence: 65%

“…We examined further reinforcing the inter-CNF interactions by ionically cross-linking carboxylate groups via multivalent metal ions, namely Mg 2+ , Ca 2+ , and Al 3+ (Goi et al, 2018). The resulting hydrogels were solvent-exchanged with hexane based on the results in the previous section, followed by evaporative drying at 23°C under ambient pressure.…”

Section: Resultsmentioning

confidence: 99%

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Nanocellulose Xerogels With High Porosities and Large Specific Surface Areas

et al. 2019

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Xerogels are defined as porous structures that are obtained by evaporative drying of wet gels. One challenge is producing xerogels with high porosity and large specific surface areas, which are structurally comparable to supercritical-dried aerogels. Herein, we report on cellulose xerogels with a truly aerogel-like porous structure. These xerogels have a monolithic form with porosities and specific surface areas in the ranges of 71–76% and 340–411 m 2 /g, respectively. Our strategy is based on combining three concepts: (1) the use of a very fine type of cellulose nanofibers (CNFs) with a width of ~3 nm as the skeletal component of the xerogel; (2) increasing the stiffness of wet CNF gels by reinforcing the inter-CNF interactions to sustain their dry shrinkage; and (3) solvent-exchange of wet gels with low-polarity solvents, such as hexane and pentane, to reduce the capillary force on drying. The synergistic effects of combining these approaches lead to improvements in the porous structure in the CNF xerogels.

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Section: Resultssupporting

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Nanocellulose Xerogels With High Porosities and Large Specific Surface Areas

et al. 2019

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Experimental, analytical and numerical investigation on tensile behavior of twisted fiber yarns

Teng

Shi

Jing

et al. 2021

Chinese Journal of Aeronautics

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Durability Evaluation of an Additive Manufactured Biodegradable Composite with Continuous Natural Fiber in Various Conditions Reproducing Usage Environment

Yaguchi

Takeuchi

Waragai

et al. 2020

IJAT

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Recently, biodegradable plastic materials that can be decomposed by living organisms have attracted significant attention because of the great demand for the safe disposal of plastics. Recycling has failed to provide a practical solution for plastic waste disposal (60% of all plastics produced are discarded). It is difficult to achieve both durability and biodegradability in biodegradable plastics. In additive manufacturing processes, polylactic acid (PLA), one of the biodegradable plastics, is typically used, but it presents strength and durability problems. We developed novel additive manufactured biodegradable composite plastics by inserting continuous natural fibers (cotton, hemp, jute, etc.) into fabricated layers of PLA. The composite had a greater strength than normal additive manufactured PLA materials and could be used like a normal PLA filament in fused deposition modeling to create free-form three-dimensional objects. In this study, we performed experiments to evaluate the durability and biodegradability of the composite (PLA as matrix and hemp fibers as reinforcement). Specimens made from the composite were exposed to a normal indoor environment and to severe environments that products might encounter during use (presence of water and UV light (300–400 nm)). The decrease in strength over time was compared with that of PLA, and the durability was evaluated. The results indicated that the strength of the manufactured composite material exceeded that of PLA under all conditions. Whereas the stiffness of PLA exposed to UV light reduced significantly, that of the composite material remained constant, suggesting the significant effect of fiber reinforcement. In addition, test specimens were buried in a simulated soil environment, and their biodegradability was evaluated. The strength of the composite material decreased rapidly, and the biodegradability was confirmed to be at an acceptable level.

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Effect of Migration Structure on Tensile Strength of a Natural Fiber Twisted Yarn and Markov Chain Simulation

Cited by 4 publications

References 19 publications

Nanocellulose Xerogels With High Porosities and Large Specific Surface Areas

Nanocellulose Xerogels With High Porosities and Large Specific Surface Areas

Experimental, analytical and numerical investigation on tensile behavior of twisted fiber yarns

Durability Evaluation of an Additive Manufactured Biodegradable Composite with Continuous Natural Fiber in Various Conditions Reproducing Usage Environment

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