Influence of Carnauba Wax on Films of Poly (Butylene Adipate Co-Terephthalate) and Sugarcane Residue for Application in Soil Cover (Mulching)

Oliveira, Thainá Araújo de; Mota, Islaine de Oliveira; Carvalho, Laura H.; Barbosa, Renata; Alves, Tatianny Soares

doi:10.1590/1980-5373-mr-2019-0040

Cited by 8 publications

(5 citation statements)

References 29 publications

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“…The absorption at 1463 cm -1 corresponds to the stretching vibration attributed to the CH 2 bond (-CH 2 scissoring) and 1377 cm -1 (-CH 3 umbrella mode), and the band at 720 cm -1 (-C-C rocking) refers to the stretching vibration of the carbon-carbon bond. Similar spectra were reported by Thainá Araújo de Oliveira et al when evaluating the influence of Carnauba wax on films of poly (butylene adipate co-terephthalate) and sugarcane residue for application in soil covers [61].…”

Section: Ft-ir Characterization Of Pure Pe-wax Filled With Bentonitesupporting

confidence: 82%

“…Figure 13 presents the Fourier-transform infrared spectroscopy (FT-IR) spectra of pure PE-wax and wax/1BNT blend (red curve). As shown, pure PE wax shows its characteristic peaks at 2915 cm -1 and 2848 cm -1 associated with the symmetrical and asymmetrical aliphatic -CH stretching vibration of carbon-hydrogen bonds [33,53,[61][62][63], which confirms saturated chains. The weak absorbance at 1720 cm -1 relates to the carbonyl stretching vibration of the ester group (-C=O stretch).…”

Section: Ft-ir Characterization Of Pure Pe-wax Filled With Bentonitementioning

confidence: 78%

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Polyethylene Wax Modified by Organoclay Bentonite Used in the Lost-Wax Casting Process: Processing−Structure−Property Relationships

et al. 2020

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In this paper, the influence of bentonite (BNT) on rheological properties, linear shrinkage, hardness, and structure of polyethylene wax (PE-wax) used in the lost-wax casting process are studied. Experiments were conducted with PE-wax with different contents of bentonite (from 0.1 to 5 wt.%). The structural changes of modified polyethylene wax were evaluated using differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The addition of bentonite in a concentration range between 0 and 0.8 wt.% into PE-wax caused a decrease of the linear shrinkage and the hardness of PE-wax/BNT blends. Modified polyethylene wax containing greater than 1 wt.% of the filler showed an increase in viscosity. The DSC-based investigations confirmed good miscibility and a uniform structure of PE-wax with BNT. Moreover, an increase in melting temperature onset and its enthalpy observed for filler PE-wax material showed an influence of bentonite on the crystalline structure of the polymeric matrix. SEM observations of the fractured surfaces confirmed the homogeneous structure of blends with contents up to 0.8 wt.% BNT. In the case of higher filler concentrations, the presence of more numerous and large clusters of filler in the polymer matrix was observed due to the increase in the viscosity of the PE-wax/BNT melt composition during mixing. The PE-wax blend with 0.4 wt.% BNT gives better results of reduced linear shrinkage and lower hardness than unmodified material. Lastly, a new developed material (PE-wax/0.4 BNT) was subjected to technological tests, consisting of the preparation of the mold and manufacture of a high-quality aluminum cast, using the lost-wax method.

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Section: Ft-ir Characterization Of Pure Pe-wax Filled With Bentonitesupporting

confidence: 82%

Section: Ft-ir Characterization Of Pure Pe-wax Filled With Bentonitementioning

confidence: 78%

Polyethylene Wax Modified by Organoclay Bentonite Used in the Lost-Wax Casting Process: Processing−Structure−Property Relationships

et al. 2020

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“…Moreover, candelilla (CLLA) wax is a vegetable wax that comes from the leaves and stems of the candelilla plant (Euphorbia antisiphilitica), which grows wild in the desert, especially in northwestern Mexico and southern Texas [ 15 , 21 , 22 , 23 ]. It possesses remarkable hardness, few crystallinities, and tackiness at high temperatures [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…CBA has excellent emulsification properties and an excellent oil binding capacity [ 15 ]. Some studies have focused on studying CBA as a compatibilizer of different blend systems [ 21 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Addition of Different Natural Waxes on the Mechanical and Rheological Behavior of PLA—A Comparative Study

et al. 2023

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In this study, poly(lactic acid) (PLA) blended with different natural waxes (beeswax, candelilla, carnauba, and cocoa) was investigated. Different wax amounts, 3, 5, 10, and 15 wt%, were incorporated into the PLA using a Brabender internal mixer. The blends were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), rotational rheometer (RR), dynamic mechanical analysis (DMA), and contact angle to observe the effect of the different waxes on the PLA physicochemical, rheological, mechanical behavior, and wetting properties. The complex viscosity of the blends was studied by employing a RR. The effect of the addition of the waxes on the mechanical properties of PLA was evaluated by DMA in the tension modality. A slight decrease in the thermal stability of PLA was observed with the addition of the waxes. However, in the case of the mechanical properties, the cocoa wax showed a considerable effect, especially in the elongation at break of PLA. Likewise, waxes had an essential impact on the water affinity of PLA. Specifically, with the addition of cocoa, the PLA became more hydrophilic, while the rest of the waxes increased the hydrophobic character.

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“…Typically, it is common to observe fiber contents in the composition of flours. Due to the accumulation of non-biodegradable plastic waste in nature, researchers use sustainable materials to produce new composites or biocomposites (Vargas et al, 2017;ISSN 1948-545X 2023 1 Moura et al, 2018;Oliveira et al, 2019;Vasconcelos et al, 2023). Composite materials represent an ecologically and technically promising option to replace conventional plastics in food packaging.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Babassu Mesocarp Flour as Potential Bio-Reinforcement for Poly(Lactic Acid)

Silva

Alves

Barbosa

et al. 2023

JFI

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Growing environmental concern has resulted in a strong trend towards using green materials, and the efficient use of by-products reduces resource waste and environmental pollution. Using Babassu Mesocarp Flour (BMF), a by-product of the babassu oil extraction industry, as bio-reinforcement for polymers, such as Poly (Lactic Acid) (PLA), is a promising alternative. Before any attempt to develop composite films, the industrially extracted BMF was characterized to know its chemical composition, particle size distribution, specific surface area, morphology, and structure, which is the main objective of this manuscript. The elemental analysis showed that the BMF is predominantly organic and also showed contents of inorganic elements by XRF. Its particles had an average diameter of 38.82 µm and a specific surface area of 3.02 m2/g. Through microscopic techniques, mainly SEM, starch granules in different shapes and sizes were observed. XRD and FTIR showed structure and functional groups typical of starchy materials, evidencing the ecological character of BMF. Progress is necessary to achieve the continuous and comprehensive use of babassu coconut by-products, mainly BMF, allowing greater appreciation. The characteristics of BMF are of great interest in PLA-based films, as they are green materials and non-toxic to the environment.

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Influence of Carnauba Wax on Films of Poly (Butylene Adipate Co-Terephthalate) and Sugarcane Residue for Application in Soil Cover (Mulching)

Cited by 8 publications

References 29 publications

Polyethylene Wax Modified by Organoclay Bentonite Used in the Lost-Wax Casting Process: Processing−Structure−Property Relationships

Polyethylene Wax Modified by Organoclay Bentonite Used in the Lost-Wax Casting Process: Processing−Structure−Property Relationships

Effect of the Addition of Different Natural Waxes on the Mechanical and Rheological Behavior of PLA—A Comparative Study

Characterization of Babassu Mesocarp Flour as Potential Bio-Reinforcement for Poly(Lactic Acid)

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