Thermal and Mechanical Properties of Sustainable Composites Reinforced with Natural Fibers

Marques, Maria de Fátima Vieira; Lunz, Juliana N.; Aguiar, Vinicius O.; Grafova, Iryna; Kemell, Marianna; Visentin, Francesca; Sartori, Andrea; Grafov, Andriy

doi:10.1007/s10924-014-0687-2

Cited by 26 publications

(14 citation statements)

References 25 publications

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“…Due to the polarity difference between the natural fibers/fillers and polymer matrices, most of the biocomposites are not compatible between the phases. Therefore, chemically modified curua fibers reinforced PBAT biocomposites were investigated by Marques et al 7 They have suggested that the chemically modified curua fibers were enhanced the performance of the resulting biocomposites owing to improve the fiber-matrix interaction/adhesion. Researchers have also proven that the relatively polar nature of maleic anhydride (MAH) groups may have tendency to react with natural fiber during melt processing of biocomposites.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable biocomposites from poly(butylene adipate‐co‐terephthalate) and miscanthus: Preparation, compatibilization, and performance evaluation

Muthuraj

Misra

Mohanty

2017

J of Applied Polymer Sci

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Miscanthus fibers reinforced biodegradable poly(butylene adipate‐co‐terephthalate) (PBAT) matrix‐based biocomposites were produced by melt processing. The performances of the produced PBAT/miscanthus composites were evaluated by means of mechanical, thermal, and morphological analysis. Compared to neat PBAT, the flexural strength, flexural modulus, storage modulus, and tensile modulus were increased after the addition of miscanthus fibers into the PBAT matrix. These improvements were attributed to the strong reinforcing effect of miscanthus fibers. The polarity difference between the PBAT matrix and the miscanthus fibers leads to weak interaction between the phases in the resulting composites. This weak interaction was evidenced in the impact strength and tensile strength of the uncompatibilized PBAT composites. Therefore, maleic anhydride (MAH)‐grafted PBAT was prepared as compatibilizer by melt free radical grafting reaction. The MAH grafting on the PBAT was confirmed by Fourier transform infrared spectroscopy. The interfacial bonding between the miscanthus fibers and PBAT was improved with the addition of 5 wt % of MAH‐grafted PBAT (MAH‐g‐PBAT) compatibilizer. The improved interaction between the PBAT and the miscanthus fiber was corroborated with mechanical and morphological properties. The compatibilized PBAT composite with 40 wt % miscanthus fibers exhibited an average heat deflection temperature of 81 °C, notched Izod impact strength of 184 J/m, tensile strength of 19.4 MPa, and flexural strength of 22 MPa. From the scanning electron microscopy analysis, better interaction between the components can be observed in the compatibilized composites, which contribute to enhanced mechanical properties. Overall, the addition of miscanthus fibers into a PBAT matrix showed a significant benefit in terms of economic competitiveness and functional performances. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45448.

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Section: Introductionmentioning

confidence: 99%

Biodegradable biocomposites from poly(butylene adipate‐co‐terephthalate) and miscanthus: Preparation, compatibilization, and performance evaluation

Muthuraj

Misra

Mohanty

2017

J of Applied Polymer Sci

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“…To find alternative resources for petroleum-derived composites, lignocellulosic fillers are being increasingly used to reinforce thermoplastics (Azwa et al 2013;ElSabbagh 2014;Marques et al 2014;Xie et al 2014), as well as thermosetting plastics .…”

Section: Introductionmentioning

confidence: 99%

Physical and Mechanical Properties of Recycled Polypropylene Composites Reinforced with Rice Straw Lignin

Karina¹,

Syampurwadi²,

Satoto³

et al. 2017

BioResources

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Recycled polypropylene (RPP) and lignin represent by-products produced in enormous amounts worldwide that remain underutilized. This study used rice straw lignin as a filler at various concentrations (0% to 70% w/w) in RPP and virgin polypropylene (PP) composites by melt blending. Structural and morphological alterations of lignin were analyzed by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively. Mechanical properties were evaluated using a universal testing machine (UTM). Results revealed that the tensile strength of the composites decreased as the lignin content increased, presumably due to the low of compatibility degree of lignin and MAPP, as well as the crack formation due to the agglomeration of lignin. However, composites with lignin as a filler showed higher moduli and water absorption capacities, as well as thickness swelling; using lignin as a filler caused a drastic reduction of the elongation at break values. The results indicated that the physical and mechanical properties of RPP and its virgin PP composites had no substantial differences. This indicated that virgin PP could be substituted by recycled polypropylene (RPP) for composite applications with the addition of MAPP.

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“…Modifications in the surface of cellulose are required for improvements in the dispersion and compatibility of CNWs in a matrix . Many methods to increase the compatibility in different matrices, such as acetylation and grafting have been proposed. Grafting can be performed by “grafting onto” and “grafting from” processes .…”

Section: Introductionmentioning

confidence: 99%

Thermal properties and crystallinity of PCL/PBSA/cellulose nanocrystals grafted with PCL chains

Simão

Bellani

Branciforti

2016

J of Applied Polymer Sci

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Bionanocomposite films of poly(E-caprolactone) (PCL) and poly(butilene succinate-co-adipate) (PBSA) blends with cellulose nanocrystals (CNW) grafted with PCL chains (CNW-g-PCL) were prepared by solution casting and their thermal properties and crystallinity were studied. The CNW surface was modified with PCL chains by grafting "from" approaches, in an effort to improve their compatibility with the polymer blends. The grafting efficiency was evidenced by FTIR and TGA analysis. The acicular morphology of CNW-g-PCL was characterized by SEM. The TGA results showed an increase in the thermal stability of the CNW grafted with PCL chains. The PCL/PBSA blends showed higher thermal stability in comparison with the neat polymers and PCL/PBSA/CNW-g-PCL bionanocomposites. DSC results showed the CNW-g-PCL act as a nucleating agent in the bionanocomposites. Additionally, a better interaction of the CNW-g-PCL in the blends of 30/70 composition in comparison with the blends of 50/50 composition was characterized. The results obtained for aforementioned films prepared by solution casting encourage the production of such bionanocomposites by melt compounding (extrusion), aiming the achievement of new bionanocomposites materials with improved thermal and mechanical properties.

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Thermal and Mechanical Properties of Sustainable Composites Reinforced with Natural Fibers

Cited by 26 publications

References 25 publications

Biodegradable biocomposites from poly(butylene adipate‐co‐terephthalate) and miscanthus: Preparation, compatibilization, and performance evaluation

Biodegradable biocomposites from poly(butylene adipate‐co‐terephthalate) and miscanthus: Preparation, compatibilization, and performance evaluation

Physical and Mechanical Properties of Recycled Polypropylene Composites Reinforced with Rice Straw Lignin

Thermal properties and crystallinity of PCL/PBSA/cellulose nanocrystals grafted with PCL chains

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