Effect of lyocell fiber cross-sectional shape on structure and properties of lyocell/PLA composites
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Yang Shen
,
Kevin J. Edgar
und
Huili Shao
Abstract
Three kinds of lyocell fibers with different cross-sectional profiles including circular, Y-shape, and H-shape (abbreviated as O-, Y-, and H-lyocell) and similar mechanical properties were used to reinforce polylactic acid (PLA) by melt compounding and injection molding. The influence of lyocell cross-section shape on the interfacial shearing force, interface morphology, and mechanical properties of lyocell/PLA composites was investigated. Single fiber pull-out tests showed that the interfacial shearing force between lyocell fibers and PLA matrix was in the order of H-lyocell > Y-lyocell > O-lyocell, which was correlated with the fiber non-roundness factor. The higher the non-roundness factor of lyocell fibers, the better were the mechanical properties of lyocell/PLA composites. The tensile strength, impact strength, and initial dynamic storage modulus of different lyocell/PLA composites were in the order of H-lyocell/PLA > Y-lyocell/PLA > O-lyocell/PLA, which was attributed to higher interfacial contact area and stronger interfacial adhesion of profiled lyocell/PLA composites. Therefore, profiled lyocell fibers may be more promising for use in bio-composite reinforcement than conventional circular lyocell fibers.
Funding source: National Key Research and Development Program of China
Award Identifier / Grant number: 2017YFB0309501
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This research was financial supported by the National Key Research and Development Program of China (2017YFB0309501).
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Conflict of interest statement: The authors declare that they have no conflicts of interest regarding this article.
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Supplementary Material
The online version of this article offers supplementary material (https://doi.org/10.1515/polyeng-2022-0070).
© 2022 Walter de Gruyter GmbH, Berlin/Boston
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Artikel in diesem Heft
- Frontmatter
- Material properties
- Effect of nanodiamond particles on the structure, mechanical, and thermal properties of polymer embedded ND/PMMA composites
- A comparative investigation on wear characteristics of polymer and biopolymer gears
- Unsaturated polyester resin modified with a novel reactive flame retardant: effects on thermal stability and flammability
- Recent progress on the morphology and thermal cycle of phase change materials (PCMs)/conductive filler composites: a mini review
- Effect of tiny amount of DMC on thermal, mechanical, optical, and water resistance properties of poly(vinyl alcohol)
- Vibration and tribological properties of epoxy-granite composites used as novel foundations for machine elements
- Effect of lyocell fiber cross-sectional shape on structure and properties of lyocell/PLA composites
- Engineering and processing
- Quality prediction and control of thin-walled shell injection molding based on GWO-PSO, ACO-BP, and NSGA-II
- Doubly modified MWCNTs embedded in polyethersulfone (PES) ultrafiltration membrane and its anti-fouling performance
- Solid-state extrusion of polymers using simple shear deformation
- Molding process and properties of polyimide-fiber-fabric-reinforced polyether ether ketone composites
