Development of biodegradable composites with treated and compatibilized lignocellulosic fibers

Abstract

ABSTRACT:The aliphatic polyester Bionolle 3020 was combined with lignocellulosic fibers, namely, flax, hemp, and wood, to produce biodegradable composite materials. The effect of two fiber surface treatments, acetylation and propionylation, and the addition of maleic anhydride (MA)-grafted Bionolle 3001 as a compatibilizer on the fiber/matrix interfacial adhesion was studied. The compatibilizer was synthesized through a MA grafting reaction in the presence of dicumyl peroxide as an initiator. The composites' mechanical properties, water absorption, fracture morphology (scanning electron microscopy), and biodegradation were evaluated. Both the fiber treatments and the compatibilizer incorporation significantly improved the composites' tensile strength, whereas an important reduction in the water absorption was found with the addition of treated fibers. Moreover, fiber incorporation into the matrix increased its biodegradation rate.

Exploration of the Origin of the UV Absorption Performance of Windmill Palm Fiber

“…Compared with those of samples (i) and (ii), the peaks at 1,375.5 and 1,460.4 cm -1 of samples (iii) and (iv) were evidently weakened because of the CH and CH3 bending vibrations of cellulose I, which reflected a decrease in the cellulose content. The peaks at 1,266.3 and 1,512.4 cm -1 can be ascribed to the C-O stretching vibration and the benzene ring C=C stretching vibration of lignin, respectively (Garside and Wyeth 2003;Tserki et al 2006). The two peaks, together with the characteristic peak of hemicellulose at 1,730 cm -1 of the untreated palm fiber, evidently disappeared in the three other samples.…”

The nanobiocomposites synthesis from biomass and its characterization

“…Cellulose content was 41% in the pretreated poppy stalks. The major effect of alkaline pretreatment is believed to be dissolution of lignin and hemicellulose, and saponification (de-esterification) of intermolecular ester bonds [5,38]. FCell showed a higher ratio of hemicellulose/lignin (H/L) than that of HCell.…”

Nanomanifestations of Cellulose: Applications for Biodegradable Composites

“…The properties of fiber-reinforced composites depend on many factors, including fiber size, fiber/matrix adhesion, volume fraction of fiber, fiber aspect ratio, fiber orientation, and stress/transfer efficiency through the interface. Fiber content in composites is a critical factor since fiber agglomeration through hydrogen bonding tends to occur at higher filler loadings [41,42]. The various processing methods of the nanocomposites are dictated by factors such as morphology of the NCC, interfacial characteristics, degree of dispersion, and the eventual shape and form of the product that is desired.…”