Mechanical Properties Analysis of Pineapple Leaf Fiber with Various TEMPO Oxidation Level
Jovan Hilmansyah R(1), Heru Suryanto(2*), Aminnudin(2), Yanuar Rohmat A P(2), J S Binoj(3), Jibril Maulana(2), Rahmad Ikrom R(1)

1)Bachelor Program of Mechanical Engineering, Malang State University, Jl. Semarang 5, Malang 65145, Indonesia.
2)Center of Excellence for Cellulose Composite (CECCom), Mechanical Engineering Department, Malang State University, Jl. Semarang 5, Malang 65145, Indonesia.
*heru.suryanto.ft[at]um.ac.id
3)Institute of Mechanical Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Tamilnadu 602105, India.

Abstract

Pineapple Leaf Fiber (PALF) known some advantages namely renewable, noncytotoxic, and excellent mechanical properties. However, mechanical properties of PALF could be improved using chemical treatment. This study aims to analysis the mechanical properties of PALF after treated by 2,2,6,6 Tetramethylpiperidinyloxy (TEMPO). The methods were, firstly, alkalization process using 6 percent Sodium Hydroxide (NaOH) to remove impurities from PALF. Alkalized PALF then treated with TEMPO at concentration of 1, 2, 3 mM. Treated fibers were dried in the oven at 60C for 4 h. Mechanical properties were analized using Single Fiber Tensile Tester. Results indicates that oxidation treatment could affect the mechanical properties of PALF. Each sample namely PALF, Alkalized PALF, and oxidated PALF at the concentration of 1, 2 and 3 mM have tensile strength of 230, 496, 1167, 732 and 901 MPa respectively. Differences occurs due to various total area of samples. Modulus Young of alkalized PALF, TEMPO at 1, 2, 3 mM of concentration by 6.4, 17.2, 18.1 and 22.7 GPa respectively. Modulus Young escalation affected by fibrillation after treatments that made each surface of fibers expand and strengthen the bond of each individual fibrils. The loss of surface layer also influenced the tensile strength of treated PALF.

Keywords: PALF, TEMPO, Oxidation, Fibrillation, Mechanical Properties.

Topic: Biomaterial Science