Enhancing properties of dissolution compounded Miscanthus giganteus reinforced polymer composite systems

Kirwan, Kerry; Johnson, RL; Jacobs, Daniel K.; Smith, G. F.; Shepherd, L.R.; Tucker, Nick

doi:10.1016/j.indcrop.2006.12.013

Cited by 20 publications

(19 citation statements)

References 12 publications

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“…Both flexural modulus and flexural strength of the PBAT were increased with increasing miscanthus fiber content up to 40 wt %. Kirwan et al . also observed such a type of flexural properties improvement in the miscanthus fiber reinforced biocomposites.…”

Section: Resultsmentioning

confidence: 77%

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: Resultsmentioning

confidence: 77%

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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“…23,24 Moreover, the addition of miscanthus bers into polymer matrix resulted in superior exural properties than its matrix. 25 As mentioned before, the polymer chain mobility has been hindered in the presence of bers, consequently the composites become stiffer and have a higher exural strength as compared to their matrix. 15 There was no exural strength difference observed in the uncompatibilized composites prepared with 30 and 40 wt% ber.…”

Section: 22mentioning

confidence: 90%

Biocomposite consisting of miscanthus fiber and biodegradable binary blend matrix: compatibilization and performance evaluation

2017

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Biocomposites were fabricated from miscanthus fibers and a blend composed of poly(butylene succinate) (PBS)/poly(butylene adipate-co-terephthalate) (PBAT) matrix by extrusion and injection molding. Due to the reinforcing effect of miscanthus fibers, the tensile, flexural, and storage modulus of the composites were increased with increasing fiber content from 30 to 50 wt%. Young's modulus of the composite was evaluated by parallel, series, Hirsch and Halpin-Tsai models. It was found that the Hirsch model has good agreement with the experimental modulus of the composites. There was a sharp reduction in tensile strength and impact strength after the incorporation of miscanthus fibers into PBS/PBAT blend matrix. These reductions were due to the incompatibility between the fibers and the matrix. Therefore, maleic anhydride (MAH) functionalized PBS/PBAT blend was prepared and used as compatibilizer to improve the compatibility between the fibers and the matrix. The composites prepared with 5 wt% MAH functionalized compatibilizer showed significant improvement in mechanical properties compared to their uncompatibilized counterparts. The morphological analysis of the composites displayed good fiber-matrix interaction in the presence of compatibilizer whereas composites showed poor interface between the phases without compatibilizer. The shear thinning behavior of the composites was increased compared to neat PBS/PBAT blend. The increased shear thinning behavior of the composite was attributed to the reduced polymer chain entanglement in the presence of fibers. The miscanthus fibers reinforced PBS/PBAT composites can offer significant benefit in terms of economic competitiveness and functional performances.

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“…However, a small number of bundles (large particles) was detected. Short fibers elements and particles, which are often neglected in the literature because they are usually considered as fillers in fiber-based composites rather than reinforcements [20,21], were present mainly because the fiber breakage conditions during the compounding process remain largely predictable [29,17]. But those elements are already present in the decorticated raw material.…”

Section: Effect Of Analysis Methods On Hemp Fiber Size Distributionmentioning

confidence: 99%

“…Kirwan et al [21] employed formulation and processing parameters to determine the suitability of solutionand injection-molded miscanthus fibers as reinforcements in poly(vinyl alcohol) (PVA), and they established the optimum processing conditions for maximum flexural performance of individual miscanthus fibers. Indeed, the substitution of synthetic fibers with lignocellulosic fibers arguably offers many advantages, including lower cost and environmental impact.…”

Section: Introductionmentioning

confidence: 99%

X-ray computed microtomography and 2D image analysis for morphological characterization of short lignocellulosic fibers raw materials: A benchmark survey

Hamdi

Delisée

Malvestio

et al. 2015

Composites Part A: Applied Science and Manufacturing

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Enhancing properties of dissolution compounded Miscanthus giganteus reinforced polymer composite systems

Cited by 20 publications

References 12 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

Biocomposite consisting of miscanthus fiber and biodegradable binary blend matrix: compatibilization and performance evaluation

X-ray computed microtomography and 2D image analysis for morphological characterization of short lignocellulosic fibers raw materials: A benchmark survey

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