Effect of thermal annealing on the mechanical and thermal properties of polylactic acid–cellulosic fiber biocomposites

Pérez‐Fonseca, Aida Alejandra; Robledo‐Ortíz, Jorge R.; González‐Núñez, Rubén; Rodrigue, Denis

doi:10.1002/app.43750

Cited by 54 publications

(57 citation statements)

References 37 publications

(71 reference statements)

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“…S3). These results are in agreement with the previous reports [13,14]. Conversely, the silanetreated ramie fibers reinforced PLA composite took quite long time for it crystallization to initiate as compared with the other type of treatments ( Fig.…”

Section: Improvement Of Crystallinity In Ramie Fibers/pla Biocompositessupporting

confidence: 93%

“…The storage modulus of neat PLA dropped sharply to 20 MPa at a temperature of 53°C and remained constant with this value. The drop ascribed to the matrix softening and α‐relaxation of the amorphous region in PLA . On the contrary, thermally annealed PLA showed an enhancement that appeared above neat PLA.…”

Section: Resultsmentioning

confidence: 98%

“…However, the reinforcement of ramie fibers considerably changed the rate of decomposition by certain levels. These changes were observed due to better thermal resistance property of reinforced ramie fibers in the PLA polymer [13,14]. The strong interaction force between OH of ramie fibers and CH 4 of PLA linkage is believed to have improved to a higher level [13,36].…”

Section: Thermal Analysis Resultsmentioning

confidence: 99%

“…Besides, the crystallization and thermal resistance of PLA polymer can be significantly improved by incorporation of fibers (other inorganic fillers) in the composite system . For example, Perez‐Fonseca et al reported an improved degree of crystallization by reinforcing three kinds of fibers (coir, agave, and pine fibers) in the PLA polymer matrix. The results indicated that the mechanical properties of reinforced PLA composites were doubled whereas the crystallinity value was improved by three folds.…”

Section: Introductionmentioning

confidence: 99%

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Improved thermal and mechanical performance of ramie fibers reinforced poly(lactic acid) biocomposites via fiber surface modifications and composites thermal annealing

et al. 2018

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Ramie fibers reinforced poly(lactic acid) (PLA) biocomposites in the recent past have gained a lot of research attention for various applications due to their biodegradability, lightweight and renewable advantages. However, their low thermal stability performances and poor mechanical properties have to this date limited their industrial use. Herein, an approach to solve the two mischiefs is presented, which involved first surface modifying of ramie fibers followed by thermal annealing of the reinforced PLA biocomposites. The resultant biocomposites showed tunable mechanical and thermal resistance properties. These improved properties are ascribed to the improved interfacial bonding of the modified ramie fibers and PLA polymer, courtesy of newly introduced reactive groups onto fibers which were capable of building strong interface bonds between the polymer–fiber boundaries. More still, the thermal stability of the resultant composite is attributed to the thermal annealing condition which provided crystallized PLA molecules upon exposure to high temperatures and the steady cooling responsible for the increased degree of crystallinity in the composites as confirmed from X‐ray diffraction and differential scanning calorimetric data results. Beyond ramie fibers‐based composites reported herein, the presented methodology can also be extended to other natural plant fiber‐based composites. These modifications are capable of providing better PLA/natural fiber‐based composites for automobiles, electronics, and other related domains. POLYM. COMPOS., 39:E1867–E1879, 2018. © 2018 Society of Plastics Engineers

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Section: Improvement Of Crystallinity In Ramie Fibers/pla Biocompositessupporting

confidence: 93%

Section: Resultsmentioning

confidence: 98%

Section: Thermal Analysis Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improved thermal and mechanical performance of ramie fibers reinforced poly(lactic acid) biocomposites via fiber surface modifications and composites thermal annealing

et al. 2018

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“…PP and Alfa/PP composites were thermally annealed in an oven at 105 °C for 1 h and subsequently cooled in air at room temperature.…”

Section: Methodsmentioning

confidence: 99%

Alfa fiber/polypropylene composites: Influence of fiber extraction method and chemical treatments

Labidi

Cao

Zrida

et al. 2019

J of Applied Polymer Sci

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Alfa fiber/polypropylene composites were manufactured using twin‐screw extrusion. Fibers were extracted using alkaline and steam explosion methods. Three chemical treatments were also applied to the alkaline‐extracted fibers: stearic acid (SA), and potassium permanganate dissolved in water (KW) and in acetone (KA). Finally, thermal annealing was applied to the composites. The results indicate that composites with steam‐exploded fibers had a significantly higher melt flow index than composites with alkaline‐extracted fibers. Moreover, the incorporation of fibers into the matrix increased the Young's modulus, where the optimum results were obtained utilizing the alkaline‐extracted fibers. Both extraction methods also significantly decreased the water uptake, especially the steam explosion. The three chemical treatments increased the melt flow index and conversely decreased the tensile strength and Young's modulus. In addition, KW treatment decreased the water uptake. Finally, thermal annealing increased the tensile strength and Young's modulus of composites with SA‐treated fibers. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47392.

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Processing of Poly(lactic Acid)

Lim¹,

Vanyo²,

Randall³

et al. 2022

Poly(Lactic Acid)

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Effect of thermal annealing on the mechanical and thermal properties of polylactic acid–cellulosic fiber biocomposites

Cited by 54 publications

References 37 publications

Improved thermal and mechanical performance of ramie fibers reinforced poly(lactic acid) biocomposites via fiber surface modifications and composites thermal annealing

Improved thermal and mechanical performance of ramie fibers reinforced poly(lactic acid) biocomposites via fiber surface modifications and composites thermal annealing

Alfa fiber/polypropylene composites: Influence of fiber extraction method and chemical treatments

Processing of Poly(lactic Acid)

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