Polyethylene‐Based Blends, Composites and Nanocomposites: State‐of‐the‐Art, New Challenges and Opportunities

Visakh, P. M.; Morlanes, María José Martínez

doi:10.1002/9781118831328.ch1

Cited by 9 publications

(10 citation statements)

References 70 publications

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“…The conductivity of PANI can be trimmed through grafting or irradiation [3,4] while exhibiting environmental stability to external agents [5,6]. Besides this, PANI is a low-cost polymer with multiple ways of preparation [7]. PANI is commonly synthesized by polymerization of aniline in an aqueous acidic medium, prioritizing the formation of the most conductive form of PANI, the emeraldine salt (ES).…”

Section: Introductionmentioning

confidence: 99%

Assessing the Influence of the Sourcing Voltage on Polyaniline Composites for Stress Sensing Applications

et al. 2020

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Polyaniline (PANI) has recently gained great attention due to its outstanding electrical properties and ease of processability; these characteristics make it ideal for the manufacturing of polymer blends. In this study, the processing and piezoresistive characterization of polymer composites resulting from the blend of PANI with ultra-high molecular weight polyethylene (UHMWPE) in different weight percentages (wt %) is reported. The PANI/UHMWPE composites were uniformly homogenized by mechanical mixing and the pellets were manufactured by compression molding. A total of four pellets were manufactured, with PANI percentages of 20, 25, 30 and 35 wt %. Fourier-transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to confirm the effective distribution of PANI and UHMWPE particles in the pellets. A piezoresistive characterization was performed on the basis of compressive forces at different voltages; it was found that the error metrics of hysteresis and drift were influenced by the operating voltage. In general, larger voltages lowered the error metrics, but a reduction in sensor sensitivity came along with voltage increments. In an attempt to explain such a phenomenon, the authors developed a microscopic model for the piezoresistive response of PANI composites, aiming towards a broader usage of PANI composites in strain/stress sensing applications as an alternative to carbonaceous materials.

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Section: Introductionmentioning

confidence: 99%

Assessing the Influence of the Sourcing Voltage on Polyaniline Composites for Stress Sensing Applications

et al. 2020

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“…After abiotic degradation, Young's modulus of the GPE did not change significantly when compared to the non-exposed polymer, which is attributed to the fact that GPE has a higher percentage of crystalline phase [37] impermeable to O 2 and H 2 O, thus limiting and slowing degradation reactions as these predominantly occur in the amorphous phases [27,38,39] . Regarding the eco-composites, it was clearly observed that the modulus of all compositions, with and without PEgMA, were reduced after 45 days of exposure.…”

Section: Tensile Testingmentioning

confidence: 93%

Effects of weathering on mechanical and morphological properties cork filled green polyethylene eco-composites

et al. 2020

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This study aims to evaluate the effects of natural weathering in the city of Teresina, State of Piauí, Brazil, on the morphology and mechanical properties of eco-composites based on high-density green polyethylene, powdered cork and compatibilizer processed in a twin-screw extruder and injection molded. The analyses revealed that although weathering induced surface bleaching of eco-composites and cracking, these effects were not intense in the compatibilized samples. The tensile properties of the investigated materials were affected by abiotic degradation, which led to a reduction of the tensile strength and elastic deformation of the eco-composites, however, the incorporation of PEgMA was fundamental for the maintenance of mechanical performance after natural aging. In general, the results obtained were satisfactory for external applications of the compatibilized eco-composite with 15% cork in the proposed weathering range, which indicates its possible use in temporary constructions.

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“…Common 2D nanomaterials consist of nanosheets and nanoplatelets. [151] The small length scale and resulting large surface area imbues these materials with remarkable mechanical, electrical, magnetic, thermal, and optical properties in comparison to their bulk counterparts. [152] While material scientists have generated nanomaterials from a broad range of inorganic materials, carbon and gold nanomaterials of different dimensionalities have been most prominently used as reinforcing components to engineer heart muscle.…”

Section: Hydrogel Composites For Heart Muscle Tissue Engineering: Ecm...mentioning

confidence: 99%

Advancing Engineered Heart Muscle Tissue Complexity with Hydrogel Composites

Dickerson

2022

Advanced Biology

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A heart attack results in the permanent loss of heart muscle and can lead to heart disease, which kills more than 7 million people worldwide each year. To date, outside of heart transplantation, current clinical treatments cannot regenerate lost heart muscle or restore full function to the damaged heart. There is a critical need to create engineered heart tissues with structural complexity and functional capacity needed to replace damaged heart muscle. The inextricable link between structure and function suggests that hydrogel composites hold tremendous promise as a biomaterial‐guided strategy to advance heart muscle tissue engineering. Such composites provide biophysical cues and functionality as a provisional extracellular matrix that hydrogels cannot on their own. This review describes the latest advances in the characterization of these biomaterial systems and using them for heart muscle tissue engineering. The review integrates results across the field to provide new insights on critical features within hydrogel composites and perspectives on the next steps to harnessing these promising biomaterials to faithfully reproduce the complex structure and function of native heart muscle.

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Polyethylene‐Based Blends, Composites and Nanocomposites: State‐of‐the‐Art, New Challenges and Opportunities

Cited by 9 publications

References 70 publications

Assessing the Influence of the Sourcing Voltage on Polyaniline Composites for Stress Sensing Applications

Assessing the Influence of the Sourcing Voltage on Polyaniline Composites for Stress Sensing Applications

Effects of weathering on mechanical and morphological properties cork filled green polyethylene eco-composites

Advancing Engineered Heart Muscle Tissue Complexity with Hydrogel Composites

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