Nonwoven polylactic acid and flax biocomposites

Alimuzzaman, Shah; Gong, Rong; Akonda, Mahmudul

doi:10.1002/pc.22561

Cited by 44 publications

(40 citation statements)

References 26 publications

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“…It can be seen that the voids of the 3D biocomposites increased as the nominal fiber fraction by weight increased. In the previous paper , SEM micrographs indicated that the addition of flax fiber resulted in the presence of voids. The voids are closely related to the processing conditions, because they can be formed by gases which may be generated in the thermal process.…”

Section: Resultsmentioning

confidence: 88%

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Three-dimensional nonwoven flax fiber reinforced polylactic acid biocomposites

Alimuzzaman

Gong

Akonda³

2013

Polym. Compos.

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Three‐dimensional (3D) shell‐structured PLA/Flax biocomposites were fabricated using a novel method incorporating the 3D nonwoven web‐forming process. PLA and flax fibers were blended in the fiber opening stage and converted to webs on the 3D mold using the air‐laying principle. The 3D webs were then consolidated by through‐air thermal bonding. The compression molding technique was used finally to convert the 3D webs to the biocomposites. The relationship between the main process parameters and the properties of the biocomposites was investigated. The results show that with increasing flax fiber content, the crush failure load, total energy absorption, specific energy absorption, and crush efficiency increased. The crushing properties decreased with increased molding temperature, but the crushing properties are not significantly affected by the molding time. The physical properties of 3D biocomposites were also evaluated and the appropriate processing parameters for 3D biocomposites were established. POLYM. COMPOS., 35:1244–1252, 2014. © 2013 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 88%

“…The nonwoven webs are thermally consolidated before finally converted to biocomposites. The nonwoven web is converted into biocomposites by the compression molding and hot‐pressing process . The crushing test was used to evaluate the mechanical properties of 3D biocomposites.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional nonwoven flax fiber reinforced polylactic acid biocomposites

Alimuzzaman

Gong

Akonda³

2013

Polym. Compos.

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“…In addition, the higher void content of the fiber reinforced composites, in particular, the random mat composites may have a role in accelerating water absorption. In this way, water/moisture initiates the biodegradation process of flax/PLA laminate [30]. Water absorbency is expressed in terms of mass percentage gain of the composites.…”

Section: Resultsmentioning

confidence: 99%

“…Nonwoven webs (250 g/m 2 ) were prepared from flax/PLA blends using a mass ratio of 50:50 (wt.%) by means of an air laying process [30]. An air laying web forming machine generally consists of feeding, carding, stripping, transporting and condensing units which ensures the isotropic fiber orientation distribution, leading to isotropic composites.…”

Section: Randomly Aligned Flax Fiber Preformsmentioning

confidence: 99%

Physico-Mechanical, Thermal and Biodegradation Performance of Random Flax/Polylactic Acid and Unidirectional Flax/Polylactic Acid Biocomposites

Akonda

Alimuzzaman

Shah

et al. 2018

Fibers

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Fully biodegradable flax/polylactic acid (PLA) thermoplastic composites were fabricated by using random (nonwoven mat) and aligned (unidirectional yarn) flax fiber as reinforcements (39% flax by volume) and Polylactic acid (PLA) as matrix. Results revealed that the aligned flax fibers have a greater reinforcing effect due to the uniform distribution of load axially along the fiber length in the composite. The aligned flax/PLA and random flax/PLA showed the tensile strength of (83.0 ± 5.0) and (151.0 ± 7.0) MPa respectively and flexural strength of (130.0 ± 5.0) and (215.0 ± 7.2) MPa respectively. Young's modulus of (9.3 ± 1.5) and (18.5 ± 2.0) GPa and flexural modulus of (9.9 ± 1.0) and (18.8 ± 1.0) GPa was attained for the random and unidirectional fiber composites, respectively. It was also found that both composite constituents, fiber and matrix, were degradable if buried in compost soil (ready soil after composting process), which is a distinctive advantage of the new composite structures. Remarkably, the biodegradation property of aligned flax fiber composites was significantly lower than random mat composites, possibly due to the less water swelling behavior of the aligned fiber composites. After 120 days burial test, the aligned flax/PLA composite displayed the reduction of 19% mass, residual flexural strength and modulus decreased by 57 and 50% respectively, while the random mat composites exhibited the loss of 27% mass, residual flexural strength and modulus declined by 80% at the same period.

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“…For instance, previous researches [24] demonstrated that flax fibres start to slowly degrade between 200 ˚C and 220 ˚C. Above this temperature, the degradation of fibres is irreversible which sets a limit excluding the possibility of using thermoplastic polymers with a melting point higher than this value [23].…”

Section: Introductionmentioning

confidence: 99%