Isaac Scientific Publishing

Advances in Food Science and Engineering

Effect of Pre-treatments in the Processing of Pineapple Leaf Fibers

Download PDF (578 KB) PP. 196 - 205 Pub. Date: December 13, 2017

DOI: 10.22606/afse.2017.14006

Author(s)

  • Jean Rome Malou
    Earth University, Guapiles, Costa Rica
  • Walter Tita
    Earth University, Guapiles, Costa Rica
  • Johan Perret
    Earth University, Guapiles, Costa Rica
  • Ashutosh Singh
    School of Engineering, University of Guelph, Ontario, Canada
  • Roger Moya Roque
    Costa Rican Institute of Technology, Cartago, Costa Rica
  • Gopu Raveendran Nair*
    Earth University, Guapiles, Costa Rica

Abstract

Hot water and alkali treatments were performed on pineapple leaves at three different temperatures (50ºC, 70ºC and 90ºC) and three different levels of concentrations of NaOH solution (2, 4, and 6%). The effect of pre-treatment was analyzed by comparing the physical qualities of pineapple leaf fiber (PALF). A physical property analysis of the PALF extracted after two pretreatments was carried out by measuring tensile strength, percentage of elongation, color, and surface properties of PALF. The PALF pre-treated at 70°C for 15 min showed maximum average tensile strength of 1206.3±753.02 MPa and the lowest value of 353.1± 41.51 MPa were recorded for PALF pre-treated at 90 ºC for 45 min. In alkali pre-treated PALF, the maximum tensile strength of 1137.2 ± 28.01 MPa was recorded for pineapple leaves treated with 2% NaOH for 6h. In both hot water and alkali treated PALF, the percentage elongation was lower compared to the non-treated PALF. Hot water treated PALF recorded higher percentage of elongation than Alkali treated PALF. The tensile strength and percentage elongation in both treatments showed similar increase with respect to an increase in temperature and alkalinity. PALF treated with hot water showed more color change than Alkali treated PALF. The hot water treated PALF registered a maximum color change (ΔE) of 23.692 (70 ºC – 45 min) while the alkali treated PALF showed a maximum color change (ΔE) of 19.721 (6%-2h). However, the latter showed better surface properties than hot water treated PALF.

Keywords

Pineapple leaf, natural fiber, extraction

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