The utilisation of oil palm fibre(OPF)and pineapple leaf fibres(PALF)as reinforcement materials for bio-phenolic com-posites is growing especially in automotive lightweight applications.The major aim of this current study is to investigate the influence of alkali(Ca(OH)2 treatment on pure and hybrid composites.The effects of enhancements in chemical interac-tions were evaluated by the Fourier-Transform Infrared Spectrometer(FTIR).Dynamic Mechanical Analysis(DMA)and Thermogravimetric Analysis(TGA)performance of untreated reinforcements(OPF and PALF)and treated(OPF/OPF)composites at varying temperature and noted sufficient interfacial bonding contributing towards the improvements in thermal stability.From DMA results,the storage modulus improved with treated composites while the damping factor was reduced.Furthermore,the treated hybrid composites exhibited significant improvements in thermal stability compared to untreated fibre composites.The results indicated that alkali calcium hydroxide(Ca(OH2(:T)incorporation in hybrid composites(OPF/PALF)results in increased tensile strength and modulus among all composites.Similarly,the alkali-treated(Ca(OH)2)-treated pure composite(T/50％PALF),and hybrid composites(T/1OPF.1PALF)exhibited better flexural strength as compared with other composites.In contrast,the T/50％PALF showed higher flexural stress of 78.2 MPa,while the flexural modulus was recorded at 6503 MPa.It can be proposed from the findings of this study that the alkali treatment(5％Ca(OH)2)can be uti-lised to improve the strength and efficiency of agriculture biomass to be used as reinforcements in composites.Additionally,the hybridisation of bio-fibre composites has the potential as a novel variety of biodegradable and sustainable composites appropriate for several industrial and engineering applications.

Sameer A.Awad;Hassan Fouad;Eman M.Khalaf;N.Saba;Hom N.Dhakal;M.Jawaid;Othman Y.Alothman

Department of Chemistry,School of Science and Technology,University of New England,Armidale,NSW 2351,Australia;Department of Chemistry,College of Education for Pure Science,University of Al-Anbar,Ramadi 31001,Iraq;Biomedical Engineering Department,Faculty of Engineering,Helwan University,Helwan 11792,Egypt;Pharmacy Department,Al-Maarif University College,Anbar 3001 Ramadi,Iraq;Laboratory of Biocomposite Technology,Institute of Tropical Forestry and Forest Products(INTROP),Universiti Putra Malaysia,43400 Serdang,Malaysia;Advanced Polymers and Composites(APC)Research Group,School of Mechanical and Design Engineering,University of Portsmouth,Portsmouth P 3DJ,UK;Department of Chemical Engineering,College of Engineering,King Saud University,Riyadh 11433,Saudi Arabia

仿生工程学报（英文版）

[1]Sameer A.Awad;Hassan Fouad;Eman M.Khalaf;N.Saba;Hom N.Dhakal;M.Jawaid;Othman Y.Alothman-.Performance Evaluation of Calcium Alkali-treated Oil Palm/Pineapple Fibre/Bio-phenolic Composites)[J].仿生工程学报（英文版）,2022(05):1493-1503

Pineapple,pineapple,1OPF,1PALF,lised,hybridisation

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