Abstract
Abstract The modification of lignocellulosic fibers can enhance their interaction with other materials and alkaline hydrogen peroxide (AHP) is a reagent widely used to promote such modification. This work aimed to modify oat hulls fibers by reactive extrusion using AHP (7 g 100 g-1 of hulls). The modified oat hulls displayed performances comparable to those observed by other researchers using conventional AHP method (without extrusion). The AHP treated oat hulls showed increased luminosity compared to the extruded ones. Fourier transform infrared spectroscopy showed differences between the modified and unmodified structures. The removal of surface compounds resulted in a more open morphology, with greater surface area and greater porosity. Reactive extrusion can be an alternative method for fiber modification with several advantages, such as short processing time and no wastewater generation.
Highlights
In the last decades, discarded plastic materials are of some composites can remain unsatisfactory[17]
This wash was performed to assess the removal of compounds that were solubilized by processing without using large amounts of water, as used in traditional processes
Five different samples were obtained: F1untreated fiber, F2- fiber modified by extrusion, F3- fiber modified by extrusion and washed, F4- fiber modified by alkaline hydrogen peroxide (AHP) and F5- fiber modified by AHP and washed
Summary
In the last decades, discarded plastic materials are of some composites can remain unsatisfactory[17]. To improve the compatibility of natural fibers with polymers, biodegradable polymers has been extensively studied several authors[17,19,20,21,22,23,24,25] proposed the surface modification of because they degrade more rapidly compared to traditional fibers from different sources. A natural, other reagents, such as hydrogen peroxide (H2O2); and hot water with the subsequent addition of neutral detergents
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