Effect of Alkaline treatment on the characteristics of pineapple leaves fibre and PALF/PP biocomposite

S. Gnanasekaran; Noor Ida Amalina Ahamad Nordin; M.M.M. Hamidi; J.H. Shariffuddin

doi:10.15282/jmes.15.4.2021.05.0671

Authors

S. Gnanasekaran Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang, 26300 Gambang, Pahang, Malaysia. Phone: +6095492888; Fax: +6095492889
N.I.A.A. Nordin Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang, 26300 Gambang, Pahang, Malaysia. Phone: +6095492888; Fax: +6095492889
M.M.M. Hamidi Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang, 26300 Gambang, Pahang, Malaysia. Phone: +6095492888; Fax: +6095492889
J.H. Shariffuddin College of Engineering, Department of Chemical Engineering, Universiti Malaysia Pahang, 26300 Gambang, Pahang, Malaysia. Phone: +6094245000; Fax: +6094245055

DOI:

https://doi.org/10.15282/jmes.15.4.2021.05.0671

Keywords:

Pineapple leaves fibre, Polypropylene, biocomposite, tensile strength, water absorption

Abstract

Pineapple leaves fibre (PALF) is one of the natural fibre that has high potential to substitute non-renewable synthetic fibre in thermoplastic products. The PALF were alkali treated with different concentrations of NaOH. Untreated and alkali treated PALF were characterized using Thermal Gravimetric Analysis (TGA) and Scanning Electron Microscopy (SEM) to determine the thermal stability and surface morphology of the fibres respectively. Biocomposites were prepared by reinforced alkali treated and untreated PALF with polypropylene (PP) matrix. Tensile properties and water absorption analysis of PALF/PP biocomposites were studied. Biocomposite with 8 wt.% of alkali treated PALF express excellent thermal stability, with maximum degradation temperature at 270 ℃ which is a 7.17% improvement compared to untreated PALF. This biocomposite also had increased tensile strength (116 MPa) with 43% improvement compared to untreated PALF/PP (66 MPa) biocomposite and had lower water absorption at 6% compared to untreated biocomposite which at 21%. Hence, alkali treated PALF is able to improve the characteristic of PALF and increase the compatibility between fibre and polymer by reducing hemicellulose and lignin components.

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