Impact of silane treatment on the dielectric properties of pineapple leaf/kenaf fiber reinforced phenolic composites

Abstract

This work deals with the dielectric properties of silane treated pineapple leaf fiber and kenaf fiber reinforced phenolic hybrid composites. The aim of the present paper is to investigate the effect of silane treatment on the pineapple leaf fiber–kenaf fiber/matrix interfacial adhesion using the dielectric relaxation spectroscopy in the frequency range from 0.1 Hz to 1 MHz and temperature range from 50 to 180℃. Our hybrid composites were fabricated by hand lay-up method at 50% total fiber loading. All the results obtained were discussed in terms of dynamic molecular and interfacial process. Two interfacial polarizations identified as the Maxwell–Wagner–Sillars effect are observed. We note that silane treatment improved the interfacial adhesion between pineapple leaf fiber/kenaf fiber and phenolic resin and it will help to develop high performance kenaf fiber/pineapple leaf fiber reinforced polymer composites for industrial applications. In fact, as known, the silane treatment developed hydrophobic nature in pineapple leaf fiber and kenaf fiber which is very positive for fiber/matrix compatibility.

Impact of nanoclay loading on the structural, thermal and dielectric properties of montmorillonite/polypropylene nanocomposites

“…A slight increase in the permittivity is noticed after the addition of Cloisite 20A and especially for the temperatures above the T g , indicating a rise of the F I G U R E 5 Isochronal variations of the real (A) and imaginary (B) and isothermal variations of the real (C) and imaginary (D) parts of the complex permittivity for the nanocomposite PP2% [Color figure can be viewed at wileyonlinelibrary.com] material polarizability. [21,23,24] Two peaks are clearer, in the curves of variations of ε 00 indicating the presence of two different phenomena. The first peak in the same frequency domain as the PP matrix (≈ 1 Hz-10 3 Hz), is attributed to the α c relaxation.…”

“…Such process arises from the polarization of induced dipoles created, due to the trapped charge carriers, at the interfaces between the Cloisite 20A and PP matrix. [21,23,24] These two relaxation phenomena are thermally activated and move towards high frequencies when increasing temperature.…”

Effects of oil palm and montmorillonite nanofillers on stiffness and interfacial adhesion of kenaf/epoxy hybrid nanocomposites

“…The advantage of these reinforcements lies in particular in their good specific properties: biodegradability, abundance, renewable nature, and low cost. [ 1–6 ] Several natural fibers have been proposed as a substitute for conventional synthetic fibers including hemp, flax, jute (in Europe), date palm, alfa (in Africa) or even pineapple leaf (PALF), kenaf (KF), and Oil Palm Empty Fruit Bunch (OPEFB) (in Asia). Currently, Malaysia produces around 17 million tons of OPEFB fibers as waste [ 7, 8 ] and are used in the polymer composite industries for different applications.…”

“…[10,11] Recent studies have shown that hybridization of natural fibers with synthetic or other natural fibers can improve the physical properties of polymeric matrix composites according to the desired industrial requirements. [12][13][14][15][16][17] More recently, many works have been carried out on the hybridization of KF fibers with natural and/or synthetic nanofillers such as KF/jute fibers/E-glass, [18] KF/coir fibers/ MMT, [19] KF/PALF fibers, [5] KF/hemp/flax/glass fibers, [20] and Areca fiber-reinforced nano-silica and neem oiltoughened epoxy resin biocomposites. [21] For example, studies on the mass change, thermal decomposition, and thermal stability of woven glass/KF/epoxy hybrid composite filled with clay nanoparticles in small quantities were studied by Mazlan et al [22] Such hybridization demonstrated better interfacial adhesion between the treated KF and the epoxy.…”

Machinability of hybrid natural fiber reinforced composites with cellulose micro filler incorporation

“…Natural composite properties were improved by hybridization using fibers, filler incorporation and coupling agents. [6][7][8][9][10] The addition of 35% pineapple leaf fiber (PALF) enhanced the tensile and flexural properties of polyester-based composites with 3 mm fiber length and 17 MPa compression pressure. 11 Pineapple fiber using NaOH treatment showed effective tensile strength results than the KOH treatment.…”