Improving interfacial adhesion in pla/wood biocomposites

Faludi, Gábor; Dora, Gábor; Renner, Karl; Móczó, János; Pukánszky, Béla

doi:10.1016/j.compscitech.2013.09.009

Cited by 69 publications

(44 citation statements)

References 37 publications

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“…The enhanced load-bearing capacity of the compatibilized composites was consistent with observed tensile modulus and strength of the PBS/miscanthus composite. The B value (4.85) of the compatibilized PBS/composites found in this study was much higher than that of compatibilized PLA/wood composites, 31,32,35 suggesting that the load-bearing capacity of compatibilized PBS/miscanthus composites is greater than that of compatibilized PLA/wood composites. Figure 3a shows the flexural properties of PBS and its composites with and without compatibilizer.…”

Section: Acs Sustainable Chemistry and Engineeringcontrasting

confidence: 62%

Injection Molded Sustainable Biocomposites From Poly(butylene succinate) Bioplastic and Perennial Grass

Muthuraj

Misra

Mohanty

2015

ACS Sustainable Chem. Eng.

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Biocomposites from poly(butylene succinate) (PBS) and perennial grass (miscanthus fibers) were successfully prepared by extrusion and injection molding methods with different fiber loadings. The tensile strength of uncompatibilized PBS/miscanthus composites was much lower compared to that of neat PBS. Unlike tensile strength, the flexural and impact strengths were significantly enhanced after incorporation of miscanthus fibers into the PBS matrix. The enhanced flexural strength was attributed to the reinforcing effect of miscathus fibers. The fiber pull-out mechanism is likely responsible for the observed impact strength improvement. Addition of 5 wt % maleic anhydride (MAH) grafted PBS (MAH-g-PBS) into PBS composites showed a significant improvement in tensile and flexural strength compared to the corresponding uncompatibilized composites and neat matrix. For example, the PBS composites with 50 wt % miscanthus fiber and 5 wt % MAH-g-PBS resulted in 22, 139, and 47% improvements in tensile, flexural, and impact strength compared to neat PBS. These improvements were attributed to the enhanced interfacial interaction between the components, as confirmed by adhesion parameter values and by surface morphological analysis. The load-bearing capacity of the compatibilized and uncompatibilized PBS/miscanthus composites was analyzed using a mathematical model. Overall, this study provides an option for preparing a sustainable biocomposite with superior mechanical and thermo-mechanical properties.

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Section: Acs Sustainable Chemistry and Engineeringcontrasting

confidence: 62%

Injection Molded Sustainable Biocomposites From Poly(butylene succinate) Bioplastic and Perennial Grass

Muthuraj

Misra

Mohanty

2015

ACS Sustainable Chem. Eng.

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“…25 Also, the large particles of WF easily debond from the polymer matrix under the effects of external loads, 26,27 which leads to poor mechanical properties of the polymer blends. In order to make full use of the wood scraps, the environmental friendly polymer blends or composites may offer a solution by combining PLA resin with the wood scraps, such as wood flour (WF) and wood fiber.…”

Section: Introductionmentioning

confidence: 99%

The morphology, rheological, and mechanical properties of wood flour/starch/poly(lactic acid) blends

Tan

et al. 2017

J of Applied Polymer Sci

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An entirely biosourced blend composed of poly(lactic acid) (PLA), starch, and wood flour (WF) was prepared by a coextruder with glycerol as a plasticizer. The morphology, rheological properties, and mechanical properties of the WF/starch/PLA blends were comprehensively analyzed. The results showed that with the decrease of the starch/WF ratio, the morphology experienced a large transformation, and the compatibility of the blends was found to be superior to other blends, with a starch/wood flour ratio of 7/3. The dynamic mechanical thermal analysis (DMA) results demonstrated the incompatibility of the components in WF/starch/ PLA blends. Following the decrease of the starch/WF ratio, the storage modulus (G 00 ) and the complex viscosity (h*) of the blends increased. The mechanical strength first increased, and then decreased with the increase of the WF concentration. The water absorption results showed that the water resistance of the blends was reduced with the lower starch/WF ratio.

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“…Silanes are claimed to improve interfacial adhesion, but the results published are often questionable and the chemistry is unclear [26,27]. Much more successful are isocyanates [28,29] and triazines in PVC and PS composites [30,31], while N,N-(1,3-phenylene dimaleiimide) (BMI) proved to be successful coupling agent not only in several polymer/filler micro and nanocomposites [32,33], but also in PLA/wood composites [34].…”

Section: Introductionmentioning

confidence: 99%

Modification of interfacial adhesion with a functionalized polymer in PLA/wood composites

Csikós

Faludi

Domján

et al. 2015

European Polymer Journal

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Maleic anhydride (MA) grafted poly(lactic acid) (PLA) coupling agents (MAPLA) were prepared by reactive processing. The amount of peroxide initiator and MA was changed in a relatively wide range. Coupling efficiency was checked in PLA/wood composites as a function of grafting degree, coupling agent and wood content. The analysis of the results showed that chain scission takes place in PLA during reactive modification. The occurrence of grafting could not be proved by FTIR spectroscopy, but a detailed NMR analysis showed that the degree of grafting depends on the amount of both reactants; a maximum of 2.5 MA groups/PLA chain could be grafted under the conditions used in the study. The functionalized polymer proved to be an efficient coupling agent in PLA/wood composites. Efficiency increased with increasing number of functionality and coupling agent amount. Coupling resulted in increased strength and reinforcement.Acoustic emission analysis of deformation processes supported by microscopy proved that the dominating local deformation process is the fracture of the fibers, but small extent of debonding also occurs in neat, uncoupled composites. The prevention of debonding by coupling resulted in the improved performance of the composites. Local processes initiate the immediate failure of the composite irrespectively of their mechanism.

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Improving interfacial adhesion in pla/wood biocomposites

Cited by 69 publications

References 37 publications

Injection Molded Sustainable Biocomposites From Poly(butylene succinate) Bioplastic and Perennial Grass

Injection Molded Sustainable Biocomposites From Poly(butylene succinate) Bioplastic and Perennial Grass

The morphology, rheological, and mechanical properties of wood flour/starch/poly(lactic acid) blends

Modification of interfacial adhesion with a functionalized polymer in PLA/wood composites

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