An investigation of fatigue, creep, and dynamic mechanical behavior of bio-fiber-reinforced PLA and their hybrid biocomposites
Biomass Conversion and Biorefinery(2024)
摘要
In the present research work, three combinations of composite samples, jute and nettle fibers reinforced with polylactic acid (PLA) composites, and their hybrids (jute/PLA, Nettle/PLA, and jute/nettle/PLA) were fabricated using compression molding process. Present work aimed at the experimental investigation of fatigue, creep, dynamic mechanical behavior (DMA), and X-ray diffraction (XRD) of all fabricated composite specimens. Hybridization of jute and nettle fiber enhanced the fatigue cycles and creep strain rate of the developed jute/nettle/PLA hybrid composite as compared to neat PLA and other composite specimens. Experimental results of DMA focused that it is observed by the damping factor (tan δ); all composite specimens obtained higher value of glass transition temperature as compared to neat PLA. Jute/PLA and nettle/PLA composites achieved the maximum glass transition temperature of 64 °C at a damping factor of 1. Jute/nettle/PLA hybrid composites obtained the uppermost value (4775.9 MPa) of storage modulus which is more than four times of neat PLA at room temperature. Jute/nettle/PLA hybrid composite obtained the highest loss modulus 550.36 MPa. In XRD, jute and nettle fibers showed small peaks at diffraction angles of 17 to 30° which indicated the presence of various constituents such as cellulose, lignin, and pectin present in these natural fibers.
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关键词
Bio-fibers,Polylactic acid,Fatigue cycle,Creep strain,Dynamic mechanical analysis,Surface roughness,X-ray diffraction
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