Influence of MMT nanoclay on impedance spectroscopy analysis of naturally woven coconut sheath/polyester hybrid composite

Abstract

In this work, the impedance spectroscopy study has been carried out for the naturally woven coconut sheath fiber reinforced composite with the effect of adding different weight percentages of montmorillonite nanoclay and chemical activation of fiber. The dispersion mechanism of nanoclay with polyester, and the modification of the fiber surface have been studied by using X-ray diffractogram, transmission electron microscope and scanning electron microscope respectively. Infra-red spectra have also been taken to study the reactive compounds of treated fibers. The impedance spectrum shows significant improvement in A.C. conductivity, dielectric constant and loss tangent values by the fiber modification, using alkali and silane treatments, due to the structural topography changes at the fiber surface. The highest dielectric strength was found in alkali-treated coconut sheath/polyester composite due to increase in orientation polarization by the absorption of moisture content at fiber surface. The addition of different weight percentages of nanoclay with coconut sheath in all the treated conditions shows significant changes in the dielectric properties.

Electro-physical properties of jute fabrics in a condition of high humidity - Effect of fabric chemical composition and coating with Cu-based nanoparticles

“…Hz, the molecular vibrations become intensive, the orientation polarization of the jute components' molecules does not take place completely, and hence, the tan δ values decrease with increasing the frequency (Li et al 2014). The obtained results are in line with the previously published data (Asanovic et al 2020;Fares et al 2019;Rajini et al 2013). 2020)).…”

“…High coefficients of linear correlation between the fabric moisture sorption and tan δ values (at 30 Hz) for alkali (r = 0.889) and oxidatively (r = 0.962) modified jute fabrics additionally prove that statement. However, the jute fabrics' molecular structure and moisture sorption are not sufficient to explain their tan δ values; the influence of fabrics' crystallinity should be studied since according to Rajini et al (2013), increased crystallinity results in a decreased tan δ values. This was proven only in the case of alkali modified jute fabrics, whereby a very high coefficient of negative linear correlation (r = -0.996) between their crystallinity and tan δ values (at 30 Hz) was observed.…”

Structural characterization of hydrophilic polymer blends/montmorillonite clay nanocomposites

“…In the advancement of materials science and technology, the polymer-clay nanocomposites (PCNs) have emerged as a new class of materials for the academic, industrial, and technological interest. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] Most of the studies have documented that the formation of the intercalated and exfoliated clay structures in the polymer matrix have resulted in the improvement of the thermal (increased heat resistance and reduced flammability) and mechanical properties of the host polymer matrix.…”

Fire and thermal resistance properties of chemically treated ligno-cellulosic coconut fabric–reinforced polymer eco-nanocomposites

“…The CSs were immersed in that solution for 1 h. The treated mats were conditioned at room temperature for about 24 h prior to use. The chemical analysis of the untreated, alkali-and silanetreated CS fiber was already reported in our previous work [23].…”