4.7 Article

Cellulosic fiber based hybrid composites: A comparative investigation into their structurally influencing mechanical properties

Journal

CONSTRUCTION AND BUILDING MATERIALS
Volume 271, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.121587

Keywords

Hybrid fiber; Twisted hybrid fiber; Wood sawdust filler; Mechanical properties; Scanning electron microscopy

Funding

  1. K.L.N. Colleges of Engineering, Tamil Nadu, India
  2. King Saud University, Riyadh, Saudi Arabia [RSP-2020/54]
  3. Sethu Institute of Technology

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This paper focuses on hybrid and twisted hybrid Indian mallow/roselle fiber yarn mat reinforced polyester composites and the effects of wood sawdust filler. The mechanical properties of these composites were evaluated, showing improved performance with the addition of wood sawdust filler. Scanning electron microscopy was used to assess internal damage of the composite samples.
This paper focuses on hybrid and twisted hybrid Indian mallow/roselle cellulosic fiber yarn mat reinforced polyester composites and effects of their wood sawdust filler. The composite materials were fabricated using compression molding-technique. There were four different combinations of hybrid yarn mat composite samples used, while the twisted hybrids were six. An evaluation of the hybrid and twisted hybrid mechanical properties for the single and double layer cases of the yarn mat was done with and without wood sawdust filler effects. The samples were tested at both warp and weft directions. From the results obtained at warp direction, it was observed that for the hybrid double layer case, longitudinal yarn mat with wood sawdust (filler) composite sample exhibited better tensile, impact and flexural strength properties in comparison with other related composites of hybrid type reported in literature. Moreover, the modified twisted hybrid double layer composites with longitudinal yarn mat and wood sawdust filler sample recorded significantly greater improvement on the mechanical properties at warp direction, when compared with the hybrid double layer longitudinal yarn mat composites with wood sawdust filler and other reported similar hybrid composite materials. Scanning electron microscopy (SEM) technique was utilized to evaluate morphological internal damage (cracks) and fractured surfaces of the various tested composite samples. Based on their mechanical performances and for further practical evidence, these two types of eco-composites were used to effectively fabricate tri-wheeler auto wheel hubs and ceiling fan blades, as applicable to automobile and electronics industries, respectively. (C) 2020 Elsevier Ltd. All rights reserved.

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