Natural fiber reinforced biomass-derived poly(ester-urethane–acrylate) composites for sustainable engineering applications

Petrenko, Dmitry; Klushin, Victor A.; Zelenskaya, Alina; Yatsenko, A. N.; Sotnikov, A. S.; Ulyankina, Anna; Smirnova, Nina

doi:10.1007/s10965-022-03342-6

Cited by 5 publications

(1 citation statement)

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“…Equilibrium water absorption is achieved, through competitive weight gain and weight loss, the moisture content remains virtually constant over time. On the one hand, RFPR undergoes chemical degradation of small resin molecules and ramie fibers under high temperatures and high-humidity conditions, such as the loss of pectin, hemicellulose and some cellulose with poor crystallization, resulting in a decrease in sample weight [ 31 ], while these damages provide extra space for water absorption, resulting in increased water absorption. On the other hand, the high moisture content of the RFRP sample (saturated moisture content is approximately 5.2%) leads to fiber swelling, leading to resin cracking or interfacial debonding between the fiber and the resin matrix, which also provides more space for the absorption of water molecules [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Effect on Ramie-Fiber-Reinforced Polymer Composite Plates: Water Uptake and Mechanical Properties

et al. 2023

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Ramie-fiber-reinforced polymer composites (RFRP) have the advantages of low price and low energy consumption, but they have high hydrophilicity due to their special chemical composition. In order to study the effect of water absorption on the performance degradation of RFRP in a hydrothermal environment, the authors prepared RFRP sheets by compression molding. Manufactured composites were exposed to a hydrothermal environment with a temperature of 40 °C and a humidity of 50% RH, 85% RH and 98% RH to study the water absorption and diffusion, mechanical properties (tensile properties, flexural properties and shear properties) of the RFRP, and their mechanical properties after drying. The research shows that the equilibrium moisture absorption rate of RFRP is mainly affected by the ambient humidity. The moisture absorption and diffusion of ramie-fiber-reinforced polymer composites (RFRP) in a hydrothermal environment conform to Fick’s law. Before reaching the moisture absorption equilibrium (1~2 weeks), the mechanical properties decline rapidly, and then tend to be flat, and the mechanical properties of the RFRP decrease significantly with the increase in humidity; the water molecules reduce the interfacial bonding performance and the modulus degradation degree of RFRP in the hydrothermal environment is greater than that of strength. After the samples were completely dried, the mechanical properties of the RFRP rebounded greatly, but less than the initial value, and the hydrothermal environment produced irreversible changes to the substrates.

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Section: Resultsmentioning

confidence: 99%