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- 저자 : Ashok K Bharimalla (검색결과 1 건)
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Thambiannan Senthilkumar,Ashok K Bharimalla,Chandrasekaran Sundaramoorthy,Prashantkumar G Patil,Nadanathangam Vigneshwaran 한국섬유공학회 2020 Fibers and polymers Vol.21 No.9
The reinforcing potential of coconut fibers, fibrillated by mechanical refining process, in an epoxy matrix wasevaluated. The coconut fiber was fibrillated by a conical refiner for different duration (10 to 40 min) and subjected tochemical compositional analysis, size distribution by microscopy and crystallinity by XRD. The fibrillation by mechanicalrefining process did not affect the crystallinity of coconut fibers. But, cellulose content increased due to the removal of ligninduring refining process. The fibrillated coconut fiber (FCF) was used to reinforce epoxy resin by casting process. The meltingtemperature, as analyzed by DSC, of epoxy composites increased from 294.75 °C (epoxy alone) to 338.96 °C (raw coconutfiber, RCF) and a maximum of 353.41 °C for 20 min processed FCF reinforced composites. The surface resistivity of epoxycontrol increased from 1.32 e10 Ω to 22.6 e10 Ω after reinforcing with control coconut fiber. But, the fibrillation processreduced the surface resistivity due to uniform distribution of FCF in the epoxy matrix avoiding the formation of air voids. Similar trend was observed for volume resistivity also. The damage force and tensile load increased significantly for the FCFreinforced composites, 61 % and 12 %, respectively, when compared to the RCF reinforced composites. Hence, as analternative of conventional alkali treatment, fibrillation of coconut fibers could significantly improve the performance ofepoxy composites.
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