Evaluation of Aging Resistance in UHMWPE/LLDPE Blend‐Based Carbon Nanotubes Nanocomposites

Silva, Bruna Cristina da; Santos, Caroline Martins dos; Couto, Carlos Alberto de Oliveira; Backes, Eduardo Henrique; Passador, Fábio Roberto

doi:10.1002/masy.201700079

Cited by 7 publications

(5 citation statements)

References 24 publications

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“…According to the Tukey's test, both samples are statistically different, displaying a reduction of about 12% in the impact resistance value. This reduction was expected since the addition of CNTs increases the stiffness of the polymer matrix and consequently reduces the impact strength, and similar results were found in the literature [37]. Moreover, PHBV/CNT nanocomposite suffered a reduction in the impact strength because the dispersion of CNTs into PHBV matrix was not good enough, changing the tenacity mechanism and consequently reducing the energy absorption [38,39].…”

Section: Notched Izod Impact Strengthsupporting

confidence: 82%

Covalently γ-aminobutyric acid-functionalized carbon nanotubes: improved compatibility with PHBV matrix

et al. 2019

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The improvement of compatibility between carbon nanotubes (CNTs) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was achieved using CNT functionalized with γ-aminobutyric acid (GABA). The efficiency of the CNT functionalization with GABA was evaluated by X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (FT-IR), Raman spectroscopy, and transmission electron microscopy (TEM). The PHBV/CNT nanocomposites were produced in the molten state with the addition of 0.5 wt% of CNT (pristine, oxidized and functionalized with GABA) and characterized concerning the Izod impact strength tests. The impact fracture morphologies were analyzed using scanning electron microscopy. The results showed that GABA was covalently attached to CNT, resulting in the detection of nitrogen in the XPS survey, the shift of carbonyl peak wavelength on FT-IR, and a higher degree of structural disorder, detected by Raman and observed in TEM images. The impact strength was not significantly affected by the introduction of CNT; however, the impact fracture mechanism was changed from fragile to ductile when CNT was functionalized with GABA. These results are promising for the production of environmentally friendly nanocomposites with superior properties.

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Section: Notched Izod Impact Strengthsupporting

confidence: 82%

Covalently γ-aminobutyric acid-functionalized carbon nanotubes: improved compatibility with PHBV matrix

et al. 2019

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“…Table 2 also shows a decrease in the degree of crystallinity with the addition and increase of CNT concentration. Although CNT acts as a nucleating agent, when homogeneously dispersed in polymeric matrices and higher concentrations, they can act as a physical barrier, due to their length, for the growth of crystallites, hindering the crystallization of the polymer [17,81]. The PHBV/CNT nanocomposite has a higher degree of crystallinity than PHBV/CNT-rec, which may be related to the better distribution of CNT in the matrix and the more real content of CNT in the final material.…”

Section: Characterization Of Nanocomposites Films 321 Differential Sc...mentioning

confidence: 99%

Evaluation of the use of carbon nanotubes recovered from a biodegradation process in the production of new biodegradable polymer nanocomposites

Silva¹,

Girotto²,

Montanheiro³

et al. 2023

Express Polym. Lett.

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The search for environmentally friendly materials has motivated a lot of investigations in academia and industry. In this regard, biodegradable polymers have stood out as an alternative material mainly to replace synthetic polymers and in the production of materials from renewable resources [1, 2]. However, with the advancement in the production and use of biodegradable polymers, new questions have arisen in the literature. The effective biodegradation of these materials when disposed of in a conducive environment. The possibility of recycling increases their useful life

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“…Fouad et al, 21 has investigated the HDPE/CNT nanocomposites prepared via extrusion blending technique and the findings reported that 4 wt% of carbon nanoparticles to improve storage and Young's modulus and yield strength without affect the melting temperature. Da Silva and co‐authors 22 reported that inclusion of 0.5 wt% loading of CNT had reduced the water absorption capacity of ultra‐high molecular weight polyethylene (UHMWPE)/linear low‐density PE blends. Similar reduction in water absorption results with the incorporation of 5% CNT in HDPE composites due to the ease of its crystallization 19 …”

Section: Introductionmentioning

confidence: 99%

Mechanical and physical characterizations of compatibilizer‐free recycled plastics blend composites modified with carbon nanotube and clay nanofiller

Arman

Chen

Ahmad

et al. 2022

J of Applied Polymer Sci

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Excessive amount of disposable and reusable plastic wastes has increasingly gained a great environmental concern. This present article aims to investigate the individual effect of multiwalled carbon nanotubes (MWCNTs) and clay loadings at 0.5, 1.0, 2.0, 4.0, and 6.0 phr on the tensile, impact, density, and water absorption properties of polymer blend made from recycled high‐density polyethylene and recycled polyethylene terephthalate. Both nanocomposites were melt‐blended using a twin screw extruder before compression molding. For MWCNT nanocomposite, 4 phr showed the optimum tensile strength (14.5 MPa), Young's modulus (587.4 MPa), and strain at break (4.2%) as compared to other loadings. For clay nanocomposite system, the optimum tensile properties (13.9 MPa tensile strength, 525.7 MPa Young's modulus, and 4.7% strain) were achieved at 1 phr. The impact strength of the nanocomposites was reduced with both nanofillers' content. With the increment of MWCNT and clay loadings, the percentages of water uptake increased but the values were still considered low (<0.26% upon 35 days immersion) capacity. These research findings with the effect of nanofiller types and loadings were statistically significant as proven in ANOVA analysis. This study formalizes a chemical‐free environmental strategy to produce nanocomposite as a plastic‐replacement product.

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Evaluation of Aging Resistance in UHMWPE/LLDPE Blend‐Based Carbon Nanotubes Nanocomposites

Cited by 7 publications

References 24 publications

Covalently γ-aminobutyric acid-functionalized carbon nanotubes: improved compatibility with PHBV matrix

Covalently γ-aminobutyric acid-functionalized carbon nanotubes: improved compatibility with PHBV matrix

Evaluation of the use of carbon nanotubes recovered from a biodegradation process in the production of new biodegradable polymer nanocomposites

Mechanical and physical characterizations of compatibilizer‐free recycled plastics blend composites modified with carbon nanotube and clay nanofiller

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