Revealing the intrinsic dielectric properties of mediterranean green fiber composites for sustainable functional products

Abstract

The ability of biodegradable materials to be miniaturized and degrade at specific rates when subjected to certain bacterium types and/or a given range of temperatures has led to a newly emerging technology: organic transient bioelectronics. In this work, the electrical characteristics of new natural composite materials are presented. Four types of natural lignocellulosic fibers were used with polypropylene: black pepper, sumac, pomegranate, and lemon. The composites were prepared as flat smooth sheets with thicknesses ∼1 mm. The dielectric constant and the ac conductivity of the prepared samples were determined for the frequency range of 1 KHz to 4 MH. All measurements were performed at room temperature and humidity utilizing parallel plate capacitor technique associated with high precision Hioki IM3536 LCR meter. The frequency response of the composites under study shows similar behavior to that of the pure sample but with various percentage increments. The dielectric constant shows that the consistent dispersion was highly affected by filler content specially at the low frequency side of the spectrum. The maximum recorded increment was around 55% for 30wt.% sumac samples at 1 KHz. The effect of larger filler loading concentration on the incremental change of the ac conductivity was more obvious at higher frequencies.

Biomimetic construction of 3D needle‐punched CF/PEEK composites based on ladybug forewing structure for directional reinforcement

“…The creatures of nature have been adapting to the ever‐changing circumstances of existence since the beginning of time, giving them highly optimized structures and distinctive living techniques 24–28 . There are also many biomass materials that can be used directly, and the resulting composites have good characteristics such as green and sustainable 16,29–50 . Insects, the largest class in the animal kingdom, were the first to evolve wings, giving them the inherent ability to fly.…”

Investigating and Predicting the Effects of Fiber Chemical Composition and Treatment on the Mechanical Properties of Natural Fiber Composites by Response Surface Method

“…Their light weight, low cost, great specific strength, degradability features and the flexibility in design have all had a considerable influence on the business of green products. As a result, bio-composite materials have been implemented in several industrial applications including automotive, aerospace, electronics, medical and packaging applications [1][2][3][4]. Natural fiber composites are potential bio-based materials that contain lignocellulosic fibers as reinforcement.…”

State‐of‐the‐art review on developing lightweight fiber‐metal laminates based on synthetic/natural fibers

“…Natural fibers extracted from plentiful resources have been combined with different polymer matrices to form composite structures with superior properties. [16][17][18] Several research studies have performed experimental investigations on composites incorporated with natural fibers, and promising results in terms of static and dynamic properties of the materials were obtained. [19][20][21][22][23] Besides static and dynamic properties, natural fibers offer innumerable merits such as biodegradability, low cost, low energy consumption during processing, low carbon footprint, low density, high availability, and so forth.…”

“…Given the increasing environmental awareness and consciousness, researchers and scientists are urged to develop more promising and sustainable green materials. Natural fibers extracted from plentiful resources have been combined with different polymer matrices to form composite structures with superior properties 16–18 . Several research studies have performed experimental investigations on composites incorporated with natural fibers, and promising results in terms of static and dynamic properties of the materials were obtained 19–23 .…”