The influence of treated eucalyptus microfibers on the properties of PLA biocomposites

Silva, Cristina G.; Campini, Priscila Almeida Lucio; Rocha, Daniel Belchior; Rosa, Derval dos Santos

doi:10.1016/j.compscitech.2019.04.010

Cited by 53 publications

(35 citation statements)

References 31 publications

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“…The processed PLA exhibited a very low WR % (<0.35%), which is less than polyesters and polyester-based composites [ 31 ], and various types of polyurethane (1–6% after 24 h) [ 32 ] proposed for thermal insulation applications. The low WR % of PLA is attributed to its hydrophobic characteristics [ 33 ] which make it a potential candidate for thermal insulation.…”

Section: Resultsmentioning

confidence: 99%

Thermal Insulation and Mechanical Properties of Polylactic Acid (PLA) at Different Processing Conditions

et al. 2020

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This work aims to provide an extensive evaluation on the use of polylactic acid (PLA) as a green, biodegradable thermal insulation material. The PLA was processed by melt extrusion followed by compression molding and then subjected to different annealing conditions. Afterwards, the thermal insulation properties and structural capacity of the PLA were characterized. Increasing the annealing time of PLA in the range of 0–24 h led to a considerable increase in the degree of crystallization, which had a direct impact on the thermal conductivity, density, and glass transition temperature. The thermal conductivity of PLA increased from 0.0643 W/(m·K) for quickly-cooled samples to 0.0904 W/(m·K) for the samples annealed for 24 h, while the glass transition temperature increased by approximately 11.33% to reach 59.0 °C. Moreover, the annealing process substantially improved the compressive strength and rigidity of the PLA and reduced its ductility. The results revealed that annealing PLA for 1–3 h at 90 °C produces an optimum thermal insulation material. The low thermal conductivity (0.0798–0.0865 W/(m·K)), low density (~1233 kg/m3), very low water retention (<0.19%) and high compressive strength (97.2–98.7 MPa) in this annealing time range are very promising to introduce PLA as a green insulation material.

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Section: Resultsmentioning

confidence: 99%

Thermal Insulation and Mechanical Properties of Polylactic Acid (PLA) at Different Processing Conditions

et al. 2020

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“…[7] However, the extraction of useful wood generates nearly 14.1 million tons of solid waste per year by the wood industry. [8] Some portion of this wood waste is used to fuel the industry but a large quantity is stockpiled and incinerated in open air, which poses a serious risk to the environment. [9] Therefore, researchers are consistently putting extreme attempts to utilize this wood waste by using it in productive applications which helps in reducing not only the environmental pollution but also lower the manufacturing cost.…”

Section: Introductionmentioning

confidence: 99%

Physical, mechanical, and thermal properties ofDalbergia sissoowood waste‐filled poly(lactic acid) composites

et al. 2021

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The present work intended to investigate the effect of Dalbergia sissoo wood waste on physical, mechanical, and thermal properties of poly(lactic acid) (PLA)-based composites. The composite specimens, containing wood waste (2.5%, 5%, 7.5%, and 10% by weight) mixed with PLA granules, were prepared by melt compounding. It was found that increased wood waste content resulted in higher modulus, porosity, and water absorption with decreased density, tensile strength, impact strength, and stress at break. Nevertheless, the flexural strength values of the composites were similar to unfilled PLA and they remained almost constant irrespective of the wood waste content. Differential scanning calorimetry analysis revealed that the presence of wood waste content increased the glass transition and cold crystallization temperature of the PLA composites. Moreover, the fractured surfaces of the composites were examined with a scanning electron microscope to study the possible failure mechanisms. The conducted investigations demonstrated that low-cost wood waste-based composites can be used as an environmentally and economically attractive substitute for lightweight applications.

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“…A common methodology to endow the material with new properties is the inclusion within the polymeric matrix of dispersed particles or fibers. Cellulose and eucalyptus microfibers are added to improve the mechanical properties and barrier properties of PLA for food packaging applications [ 4 , 5 , 6 ]. Hydroxyapatite or magnesium phosphate fibers are included in PLA for the electrospinning fabrication of biomedical devices [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Magnesium-Polylactic Acid Films Casted on Different Substrates and Doped with Diverse Amounts of CTAB

et al. 2021

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Polylactic acid (PLA) is a good candidate for the manufacture of polymeric biodegradable biomaterials. The inclusion of metallic particles and surfactants solves its mechanical limitations and improves its wettability, respectively. In this work, cetyltrimethylammonium bromide (CTAB) and magnesium particles have been incorporated into PLA films to evaluate the changes produced in the polymeric matrix cast on glass and silicone substrates. For this purpose, the surface of the films has been characterized by means of contact angle measurements and ToF-SIMS. Depth profiles and SEM images of the cross sections of the films have also been obtained to study their morphology. The results show that the CTAB in the polymer matrix with and without magnesium improves the wettability of the films, making them more suitable for cell adhesion. The higher the hydrophilicity, the higher the surfactant concentration. The depth profiles show, for the first time, that, depending on the surfactant concentration and the presence of Mg, there is a layer-like distribution near the surface where, in addition to the CTAB + PLA mixture, a surfactant exclusion zone can be seen. This new structure could be relevant in in vitro/in vivo situations when the degradation processes remove the film components in a sequential form.

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The influence of treated eucalyptus microfibers on the properties of PLA biocomposites

Cited by 53 publications

References 31 publications

Thermal Insulation and Mechanical Properties of Polylactic Acid (PLA) at Different Processing Conditions

Thermal Insulation and Mechanical Properties of Polylactic Acid (PLA) at Different Processing Conditions

Physical, mechanical, and thermal properties ofDalbergia sissoowood waste‐filled poly(lactic acid) composites

Characterization of Magnesium-Polylactic Acid Films Casted on Different Substrates and Doped with Diverse Amounts of CTAB

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