Bio-Composites Based on Poly(lactic acid) Containing Mallow and Eucalyptus Surface Modified Natural Fibers

Araújo, Rafael da Silva; Marques, Maria de Fátima Vieira; Oliveira, Priscila Ferreira de; Calado, Claudinei Rezende

doi:10.1007/s10924-018-1253-0

Cited by 7 publications

(8 citation statements)

References 43 publications

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“…These reaction conditions caused a drastic decrease in the primary fiber length and gave the FE9 fibers a rough and brittle appearance. Nonetheless, these hydrolyzed eucalyptus fibers did not show any noticeable changes in the diameter by the treatment (Araújo et al 2018). The XRD analysis confirms that the fiber crystallinity degree diminishes after acidic modification.…”

Section: Acid Hydrolysis Treatmentmentioning

confidence: 58%

“…As mentioned, the acidic treatment of lignocellulosic materials can lead to the hydrolysis of lignin, pectin and hemicellulose molecules, thereby removing the amorphous components of plant substance from the cellulosic fibers. The direct result of that is a considerable reduction in the natural fiber diameter and an improvement in the fiber/matrix interfacial adhesion (Araújo et al 2018).…”

Section: Acid Hydrolysis Treatmentmentioning

confidence: 99%

“…The acid hydrolysis treatment procedure was employed by Araújo et al to improve the properties of PLA-based biocomposites containing eucalyptus and mallow fibers (Araújo et al 2018). The hydrolysis reaction of mallow fibers was carried out after alkali pretreatment while the eucalyptus fibers were exposed to both alkali and bleaching pretreatments before the hydrolysis modification.…”

Section: Acid Hydrolysis Treatmentmentioning

confidence: 99%

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Towards Sustainable Buildings with Free-Form Geometries: Development and Application of Flexible NFRP in Load-Bearing Structures

Dahy

2021

Biocomposite Materials

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of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, expressed or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Acid Hydrolysis Treatmentmentioning

confidence: 58%

Section: Acid Hydrolysis Treatmentmentioning

confidence: 99%

Section: Acid Hydrolysis Treatmentmentioning

confidence: 99%

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Towards Sustainable Buildings with Free-Form Geometries: Development and Application of Flexible NFRP in Load-Bearing Structures

Dahy

2021

Biocomposite Materials

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“…The introduction of loads can trigger two different phenomena related to the crystallinity degree: the first one is mobility restriction of the polymeric chains during the crystallization process, disrupting the ordering of the chains, thus preventing the crystallinity degree from increasing. An example of this phenomenon is shown by Silva et al, when he introduced fibers obtained from eucalyptus [ 64 ]. By contrast, in some cases the inclusion of fibers favors the formation of crystallization cores, leading to a higher degree of crystallinity, as it is reported in the work of Zhang et al, who introduced several fibers in a PLA matrix [ 65 ].…”

Section: Resultsmentioning

confidence: 99%

The Effect of Varying the Amount of Short Hemp Fibers on Mechanical and Thermal Properties of Wood–Plastic Composites from Biobased Polyethylene Processed by Injection Molding

et al. 2021

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Biobased HDPE (bioHDPE) was melt-compounded with different percentages (2.5 to 40.0 wt.%) of short hemp fibers (HF) as a natural reinforcement to obtain environmentally friendly wood plastic composites (WPC). These WPC were melt-compounded using a twin-screw extrusion and shaped into standard samples by injection molding. To improve the poor compatibility between the high non-polar BioHDPE matrix and the highly hydrophilic lignocellulosic fibers, a malleated copolymer, namely, polyethylene-graft-maleic anhydride (PE-g-MA), was used. The addition of short hemp fibers provided a remarkable increase in the stiffness that, in combination with PE-g-MA, led to good mechanical performance. In particular, 40 wt.% HF drastically increased the Young’s modulus and impact strength of BioHDPE, reaching values of 5275 MPa and 3.6 kJ/m2, respectively, which are very interesting values compared to neat bioHDPE of 826 MPa and 2.0 kJ/m2. These results were corroborated by dynamic mechanical thermal analysis (DMTA) results, which revealed a clear increasing tendency on stiffness with increasing the fiber loading over the whole temperature range. The crystal structure was not altered by the introduction of the natural fibers as could be seen in the XRD patterns in which mainly the heights of the main peaks changed, and only small peaks associated with the presence of the fiber appeared. Analysis of the thermal properties of the composites showed that no differences in melting temperature occurred and the non-isothermal crystallization process was satisfactorily described from the combined Avrami and Ozawa model. As for the thermal degradation, the introduction of HF resulted in the polymer degradation taking place at a higher temperature. As for the change in color of the injected samples, it was observed that the increase in fiber generated a clear modification in the final shades of the pieces, reaching colors very similar to dark woods for percentages higher than 20% HF. Finally, the incorporation of an increasing percentage of fibers also increased water absorption due to its lignocellulosic nature in a linear way, which drastically improved the polarity of the composite

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“…Better fiber-matrix bond strength along with improved mechanical and thermal properties of the jute/poly (lactic acid) was observed after silane and alkali treatment of jute fiber (Zafar et al 2016). Similarly, improved mechanical, thermal, and water absorption properties of coconut and mallow-eucalyptus fiber composites were found after the chemical treatment of fiber surface (Sarkar et al 2017;Araujo et al 2018). Combined use of natural fiber with synthetic fiber or filler in a composite, i.e.…”

Section: Introductionmentioning

confidence: 88%

Study on static and dynamic mechanical properties of hybrid palm stalk fiber reinforced epoxy composites

Kar

Rout

Sutar

et al. 2020

BioRes

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Static and dynamic effects of palm leaf stem stalk (PLSS) powder were investigated relative to the bi-directional palm stalk fiber reinforced epoxy composites. The PLSS bio-filler was incorporated into the epoxy resin by varying its content from 0 to 15 wt%. The hybrid palm-epoxy composites were manufactured using the hand-lay-up technique followed by light compression molding. The results for the mechanical properties of the PLSS particle (15 wt%)/palm/epoxy composites indicated an improvement in the tensile modulus, flexural modulus, and impact strength by approximately 33, 32, and 21%, respectively, when compared to the palm/epoxy composite. The dynamic mechanical analysis (DMA) of the composites showed an enhancement in the storage modulus, loss modulus and damping capacity (tan ) by approximately 75, 95, and 47%, respectively, when compared to the palm/epoxy composite. The fiber-matrix interaction was studied using a Cole-Cole plot analysis. The swelling and degradation resistance of the composites was increased with filler addition.

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Bio-Composites Based on Poly(lactic acid) Containing Mallow and Eucalyptus Surface Modified Natural Fibers

Cited by 7 publications

References 43 publications

Towards Sustainable Buildings with Free-Form Geometries: Development and Application of Flexible NFRP in Load-Bearing Structures

Towards Sustainable Buildings with Free-Form Geometries: Development and Application of Flexible NFRP in Load-Bearing Structures

The Effect of Varying the Amount of Short Hemp Fibers on Mechanical and Thermal Properties of Wood–Plastic Composites from Biobased Polyethylene Processed by Injection Molding

Study on static and dynamic mechanical properties of hybrid palm stalk fiber reinforced epoxy composites

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