The effect of organobentonites from spent bleaching earth (SBE) and commercial bentonite on nanocomposite properties

Abstract

This paper concerns on synthesis of nanocomposites consisting of Poly(lactic acid) (PLA) and clays. Two types of clays were regenerated organobentonite and commercial organobentonite. PLA and clays were melt extruded using single-screw extruder. The extruded compound was pelletized, then hot pressed using compression molding machine. Regenerated organobentonite was obtained from regeneration of spent bleaching earth (SBE) using solvent extraction and oxidation method. Afterwards, regenerated SBE modified by organic compound. While, commercial organobentonite was directly modified of commercial bentonite using organic compound. In this study, nanocomposites were prepared with varying compositions of clays from 0% to 5% (by weight). Experimental results show that partially exfoliated nanocomposites structure was shown by X-ray diffraction analyses. In addition, the effect of clays on morphology structure, mechanical, barrier, and biodegradable properties were analyzed. The utilization of clays in nanocomposite increases mechanical properties at low clay compositions. Furthermore, PLA-clay nanocomposites show better barrier and biodegradable properties compared to that of the neat PLA.

Reactivation of used bentonite (Spent Bleaching Earth) and its reuse as adsorbent for CPO (Crude Palm Oil) bleaching process

“…Some of the other major bentonite-using industries are coconut cooking oil and margarine with growth rates of 8.22% and 25.3% respectively. This indicates that the need for bentonite in the country is also increasing [17].…”

A A Novel Poly (vinylidene) Fluoride/TiO2/Spent Bleaching Earth for Enhancing Hydrophilic Hollow Fibre Membrane

“…The existence of oil carbon chains and unbound fatty acids is indicated by C-H bonds at 2923 cm -1 and 2853 cm -1 as well as -C=O ester bonds at 1745 cm -1 . Furthermore, there are also sections with -OH bonds at wavelengths surpassing 3000 cm -1 [26]. The results of the regeneration process have retained only certain essential functional groups in SBE, including the silica matrix (exhibiting Si-O-Si stretching vibrations) at a wavelength of 1031 cm -1 and silica or quartz (displaying Si-O vibrations) at 795 cm -1 [22,27,28].…”