Wear Resistant Nanocomposites Based on Biomedical Grade UHMWPE Paraffin Oil and Carbon Nano-Filler: Preliminary Biocompatibility and Antibacterial Activity Investigation

Catauro, Michelina; Scolaro, Cristina; Poggetto, Giovanni Dal; Pacifico, Severina; Visco, Annamaria

doi:10.3390/polym12040978

Cited by 21 publications

(16 citation statements)

References 51 publications

(62 reference statements)

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“…aureus and P . aeruginosa by means of a modify Kirby–Bauer test [ 20 ]. Briefly, nutritive agar was inoculated with cellular solutions of bacteria with a concentration adjusted to 1 × 10 6 CFU mL −1 .…”

Section: Methodsmentioning

confidence: 99%

Electrospun Polyvinylpyrrolidone-Gelatin and Cellulose Acetate Bi-Layer Scaffold Loaded with Gentamicin as Possible Wound Dressing

et al. 2020

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Acceleration of wound healing can be achieved with the use of wound dressings. Through the electrospinning technique, a polymeric scaffold composed of two layers was processed: a gelatin and polyvinylpyrrolidone layer with gentamicin, and a second layer of cellulose acetate. The conditions for the electrospinning process were standardized for voltage parameters, feed flow and the distance from the injector to the collector. Once the values of the main variables for the electrospinning were optimized, a three-hour processing time was established to allow the separation of the material from the collector. The obtained material was characterized by observations on scanning electron microscopy, Fourier transform infrared spectroscopy and thermal analysis; contact angle measurement was performed to evaluate wettability properties, and antibacterial activity against Pseudomonas aeruginosa and Staphylococcus aureus were evaluated using the Kirby–Bauer test. The obtained fibers that form the bi-layer scaffold present diameters from 100 to 300 nm. The scaffold presents chemical composition, thermal stability, wettability characteristics and antibacterial activity that fulfill the proposal from this study, based on obtaining a scaffold that could be used as a drug delivery vehicle and a wound dressing material.

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Section: Methodsmentioning

confidence: 99%

Electrospun Polyvinylpyrrolidone-Gelatin and Cellulose Acetate Bi-Layer Scaffold Loaded with Gentamicin as Possible Wound Dressing

et al. 2020

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“…For each sample, the specific wear rate Wsp (mm 3 /Nm) was calculated as:

where ∆m (mg) is the mass loss of the specimen, ρ (g/mL) is the density, F n (N) is the normal load, and L (m) is the total sliding distance. The final value of the specific wear rate Wsp was determined by the average of the Wsp values of n.3 polymeric samples (for each nanocomposite obtained) [ 29 , 30 ]. The mass loss and the density were evaluated by a high-sensitivity electronic weighing balance (Explorer pro, OHAUS Corporation, Parsippany, NJ-USA, EP 214C) with an accuracy of 10 4 g. The density of pure PE was 0.9604 g/cm 3 , and that of the nanocomposite with 0.3 wt % of ball milled graphite was 0.965 g/cm 3 .…”

Section: Methodsmentioning

confidence: 99%

“…Graphite could be also considered to improve the wear resistance of polymers, since it is an additive capable of increasing tribological properties [ 26 , 27 , 28 ]. This occurs thanks to the known lubricating properties of carbonaceous layers [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical, Wear and Thermal Behavior of Polyethylene Blended with Graphite Treated in Ball Milling

et al. 2021

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Additive manufacturing, civil, and biomechanical applications are among the most important sectors, where the filler’s presence can significantly improve the quality of polymeric products blends. The high market demand of new low-cost material to be used as shock absorbers and mechanical joints arouses our curiosity to study a relatively common commercial polymer and filler. The possible improvement by blending high-density polyethylene (HDPE) and graphite was investigated for these sectors. To achieve this objective, we have prepared HDPE/graphite nanocomposites following mechanical treatment to understand which parameter provides the researched properties. As widely reported in the literature, milling treatment leads to the decrease of the particle size and the exfoliation of graphitic layers. Therefore, graphite has been previously treated with a ball mill for different times (1–16 h) to enhance its lubricating action. We checked an improvement in stiffness, yielding strength, thermal stability, and, in particularly, wear resistance that increased by 65% with respect to that of polyethylene (PE). A treatment time of eight hours in ball milling could be enough to give an appreciable improvement. The wear behavior of HDPE with treated graphite has not been deeply investigated so far, and it could be important because HDPE is considered a “carrier polymer” for different low-friction applications.

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“…FTIR spectra can also provide evidence of the presence of hydrogen or covalent bonds between the organic and inorganic components. Many studies report the formation of hydrogen bonds between the polymer and the residual M–OH bonds of the inorganic network in the hybrids, proved by FTIR spectra [ 66 , 67 , 68 ].…”

Section: Hybrid Materialsmentioning

confidence: 99%

Characterization of Hybrid Materials Prepared by Sol-Gel Method for Biomedical Implementations. A Critical Review

Catauro

Ciprioti

2021

Materials

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The interaction between tissues and biomaterials (BM) has the purpose of improving and replacing anatomical parts of the human body, avoiding the occurrence of adverse reactions in the host organism. Unfortunately, the early failure of implants cannot be currently avoided, since neither a good mixture of mechanical and chemical characteristics of materials nor their biocompatibility has been yet achieved. Bioactive glasses are recognized to be a fine class of bioactive substances for good repair and replacement. BM interact with living bones through the formation of a hydroxyapatite surface layer that is analogous to bones. Bioglasses’ composition noticeably affects their biological properties, as does the synthesis method, with the best one being the versatile sol-gel technique, which includes the change of scheme from a ‘sol’ fluid into a ‘gel’. This process is widely used to prepare many materials for biomedical implants (e.g., hip and knee prostheses, heart valves, and ceramic, glassy and hybrid materials to serve as carriers for drug release). Nanoparticles prepared by the sol-gel method are interesting systems for biomedical implementations, and particularly useful for cancer therapy. This review provides many examples concerning the synthesis and characterization of the above-mentioned materials either taken from literature and from recently prepared zirconia/polyethylene glycol (PEG) hybrids, and the corresponding results are extensively discussed.

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Wear Resistant Nanocomposites Based on Biomedical Grade UHMWPE Paraffin Oil and Carbon Nano-Filler: Preliminary Biocompatibility and Antibacterial Activity Investigation

Cited by 21 publications

References 51 publications

Electrospun Polyvinylpyrrolidone-Gelatin and Cellulose Acetate Bi-Layer Scaffold Loaded with Gentamicin as Possible Wound Dressing

Electrospun Polyvinylpyrrolidone-Gelatin and Cellulose Acetate Bi-Layer Scaffold Loaded with Gentamicin as Possible Wound Dressing

Mechanical, Wear and Thermal Behavior of Polyethylene Blended with Graphite Treated in Ball Milling

Characterization of Hybrid Materials Prepared by Sol-Gel Method for Biomedical Implementations. A Critical Review

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