Comprehensive Analysis of Rheological, Mechanical, and Thermal Properties in Poly(lactic acid)/Oxidized Graphite Composites: Exploring the Effect of Heat Treatment on Elastic Modulus

Polymers, Journal Year: 2024, Volume and Issue: 16(3), P. 431 - 431

Published: Feb. 4, 2024

This study is focused on investigating the rheological and mechanical properties of highly oxidized graphite (GrO) incorporated into a poly (lactic acid) (PLA) matrix composite. Furthermore, samples were annealed at 110 °C for 30 min to whether GrO concentration has an effect elastic modulus (E’) after treatment. The incorporation PLA was carried out by employing internal mixing chamber 190 °C. Six formulations prepared with concentrations 0, 0.1, 0.5, 1, 1.5, 3 wt%. thermal stability, thermomechanical behavior, crystallinity composites evaluated utilizing thermogravimetric analysis (TGA), dynamic (DMA), differential scanning calorimetry DSC, respectively. stability (according Tmax) PLA/GrO did not change substantially compared PLA. According increased until reached 1 wt% afterward decreased. Regarding heat treatment composites, E’ (by two orders magnitude) 80 maximum value achieved non-heat-treated composites.

Language: Английский

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Nanostructured Coatings Based on Graphene Oxide for the Management of Periprosthetic Infections

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(4), P. 2389 - 2389

Published: Feb. 17, 2024

To modulate the bioactivity and boost therapeutic outcome of implantable metallic devices, biodegradable coatings based on polylactide (PLA) graphene oxide nanosheets (nGOs) loaded with Zinforo™ (Zin) have been proposed in this study as innovative alternatives for local management biofilm-associated periprosthetic infections. Using a modified Hummers protocol, high-purity ultra-thin nGOs obtained, evidenced by X-ray diffraction (XRD) transmission electron microscopy (TEM) investigations. The matrix-assisted pulsed laser evaporation (MAPLE) technique has successfully employed to obtain PLA-nGO-Zin coatings. stoichiometric uniform transfer was revealed infrared (IRM) scanning (SEM) studies. In vitro evaluation, performed fresh blood samples, shown excellent hemocompatibility PLA-nGO-Zin-coated samples (with hemolytic index 1.15%), together their anti-inflammatory ability. Moreover, significantly inhibited development mature bacterial biofilms, inducing important anti-biofilm efficiency as-coated samples. herein-reported results evidence promising potential be used biocompatible antimicrobial surface modification implants.

Language: Английский

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Additive manufacturing of 3D networks based on poly(lactic acid) and amine functionalized graphene oxide as a platform for scaffolds

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: 141(21)

Published: March 5, 2024

Abstract In the present study, 3D networks were printed using fused deposition modeling (FDM) technique. The purpose was investigate printability of graphene oxide (GO)‐based composites for potential bone tissue engineering applications. Poly(lactic acid) (PLA) filaments containing GO and amine functionalized (N‐GO) produced by melt extrusion employed to print networks. cytotoxicity, morphological, rheological, thermal behavior samples compared. wettability analyses indicated an improvement in dispersion throughout matrix PLA when functionalized. viscoelastic flow properties, as determined rheology, that freeze‐dried had lower viscosity than other composites, with a 59.4 (Pa s), decrease nine times compared pure PLA, while N‐GO presented improved interaction. contact angle (108°) decreased 87° 84° GO, respectively. depicted incorporation no effect on crystallinity or transitions matrix, maintaining its stability. Finally, cytotoxicity analysis not toxic cell culture assay found promote viability, especially PLA/N‐GO network. Thus, these results revealed vast horizon toward use GO/biodegradable polymers platforms be applied scaffolds.

Language: Английский

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Study of Ethylene-Removing Materials Based on Eco-Friendly Composites with Nano-TiO2

Polymers, Journal Year: 2023, Volume and Issue: 15(16), P. 3369 - 3369

Published: Aug. 11, 2023

Ethylene is a phytohormone that responsible of fruit and vegetable ripening. TiO2 has been studied as possible solution to slowing down unwanted ripening processes, due its photocatalytic capacity which enables it remove ethylene. Thus, the objective this study was develop nanocomposites based on two types eco-friendly materials: Mater-Bi® (MB) poly(lactic acid) (PLA) combined with nano-TiO2 for ethylene removal determine their ethylene-removal capacity. First, physical–chemical characterization different particle sizes (15, 21, 40 100 nm) done through structural morphological analysis (DRX, FTIR TEM). Then, activity were determined, evaluating effects time type light irradiation. With respect nanoparticles, whole samples had an anatase structure. According activity, nanoparticles 21 nm showed highest against (~73%). The results also significant differences in when comparing size radiation time. used produce melt-extrusion process simulate industrial processing conditions. nanocomposites’ ethylene-removing properties, there between concentrations, 5% active (~57%). obtained are promising new studies needed focus changes material format evaluation ethylene-sensitive fruits.

Language: Английский

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Graphene Oxide Enhanced Nanocellulose/Chitosan Biodegradable Aerogel Pad for Fresh Pork Preservation

Food and Bioprocess Technology, Journal Year: 2024, Volume and Issue: 17(12), P. 4768 - 4780

Published: April 25, 2024

Language: Английский

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Ethylene Scavenging Films Based on Ecofriendly Plastic Materials and Nano-TiO2: Preparation, Characterization, and In Vivo Evaluation

Polymers, Journal Year: 2024, Volume and Issue: 16(6), P. 853 - 853

Published: March 20, 2024

It is known that ethylene plays an important role in the quality characteristics of fruits, especially storage. To avoid deterioration fruits caused by ethylene, titanium dioxide (TiO

Language: Английский

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In vitro toxicity of two functionalized reduced graphene oxide materials with potential application in food packaging

Toxicology in Vitro, Journal Year: 2024, Volume and Issue: 102, P. 105970 - 105970

Published: Nov. 13, 2024

Language: Английский

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Silver/Graphene Oxide Nanostructured Coatings for Modulating the Microbial Susceptibility of Fixation Devices Used in Knee Surgery

International Journal of Molecular Sciences, Journal Year: 2023, Volume and Issue: 25(1), P. 246 - 246

Published: Dec. 23, 2023

Exploring silver-based and carbon-based nanomaterials’ excellent intrinsic antipathogenic effects represents an attractive alternative for fabricating anti-infective formulations. Using chemical synthesis protocols, stearate-conjugated silver (Ag@C18) nanoparticles graphene oxide nanosheets (nGOs) were herein obtained investigated in terms of composition microstructure. Scanning electron microscopy (SEM) transmission (TEM) characterizations revealed the formation nanomaterials with desirable physical properties, while X-ray diffraction (XRD) analyses confirmed high purity synthesized nanomaterials. Further, laser-processed Ag@C18-nGO coatings developed, optimized, evaluated biological microbiological outcomes. The highly biocompatible nanostructured proved suitable candidates local modulation biofilm-associated periprosthetic infections.

Language: Английский

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Graphene oxide enhanced nanocellulose/chitosan biodegradable aerogel pad for fresh pork preservation

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 8, 2024

This study aimed to prepare a degradable bacteriostatic aerogel pad that can absorb pork exudate extension for long shelf life. The addition of Graphene oxide(GO) was used improve the and mechanical characteristics nanocellulose(CNC) chitosan(CTS) matrix materials, obtained by freeze-drying technique. results showed when GO concentration 0.4wt%, antibacterial network had uniform structure, good properties water/oil adsorption, exhibited effective growth reproduction inhibition against Escherichia coli Staphylococcus aureus. Under condition 4℃, with 0.4wt% could be as packaging fresh pork, absorbed juice oozed during storage process prolonged pork's life postponed color, pH, TVB-N changes.

Language: Английский

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Melt processing of graphene-coated polylactide granules for producing biodegradable nanocomposite with higher mechanical strength

Polymer-Plastics Technology and Materials, Journal Year: 2024, Volume and Issue: 63(11), P. 1421 - 1437

Published: April 2, 2024

Innovative melt processing technology is necessary for the production of biodegradable polylactide/graphene nanocomposites. In this paper, we present aqueous spray coating method to prepare graphene-coated polylactide granules improving distribution small graphene contents in polymer matrix during mixing process. Three types functionalized nanosheets, including oxide (GO), reduced (RGO) and poly(ethylene glycol)/RGO (PEG/RGO), were investigated formations coatings on subsequent melt-processed It found that RGO nanosheets have good interfacial compatibility form better granules. Melt produced nanocomposites with higher mechanical strengths. Nanocomposite materials containing 0.1% showed best improvements thermal properties. As-prepared nanomaterials characterized using transmission electron microscopy (TEM), scanning (SEM), energy dispersive X-ray spectroscopy (EDS), ultraviolet-visible (UV-Vis), attenuated total reflectance infrared (ATR-FTIR), tensile, flexural impact measurements, differential calorimetry (DSC) integrated thermogravimetric analysis (TGA-DTA). general, innovative strategy applicable manufacturing PLA/graphene sustainable trend environmentally friendly development.

Language: Английский

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