Influence of deposition temperature on the properties of hydroxyapatite obtained by electrochemical assisted deposition

Cotruț, Cosmin M.; Vlădescu, Alina; Dinu, Mihaela; Vrânceanu, Diana Maria

doi:10.1016/j.ceramint.2017.09.227

Cited by 53 publications

(38 citation statements)

References 74 publications

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“…The test results are listed in Table 4. The roughness of the fiber surface was significantly increased after the addition of PC, and first increased and then decreased with the increase of PC content [34]. The highest roughness (1.03 μm) was obtained at PC-3, which is more than 5.15 times than that of pure PP fiber (0.2 μm), and improved by nearly 415%.…”

Section: Resultsmentioning

confidence: 99%

One-Step Bark-Like Imitated Polypropylene (PP)/Polycarbonate (PC) Nanofibrous Meltblown Membrane for Efficient Particulate Matter Removal

Cen

Ren

et al. 2019

Polymers

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A bark-like imitated polypr opylene (PP)/polycarbonate (PC) nanofibrous membrane was constructed by one-step meltblown technique for efficient particulate matter (PM) removal. The effects of PC content (0%, 1%, 3%, 5%, and 7%) on membrane thermal stability, microscopic characteristics, filtration performance, hydrophilicity, and water vapor transmission were investigated. The results demonstrated that using facile design of incompatibility and viscosity difference between PC and PP polymers decreases average fiber diameter, creating a bark-like groove appearance and increasing surface potential, making a new PP/PC membrane with high filtration performance. The resultant PP/PC membrane had finer average fiber diameter of 0.63 μm, which was nearly 89.41% lower than PP membranes (5.95 μm), and its quality factor (0.036 Pa−1) was nearly 2.12 times than that of PP membranes (0.017 Pa−1) with the die hole diameter of 0.5 mm. This fabrication technique of a special meltblown filter membrane saves the cost of die retrofitting and post-processing, which provides an innovative method for particulate efficient removal of high efficient filters.

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Section: Resultsmentioning

confidence: 99%

One-Step Bark-Like Imitated Polypropylene (PP)/Polycarbonate (PC) Nanofibrous Meltblown Membrane for Efficient Particulate Matter Removal

Cen

Ren

et al. 2019

Polymers

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“…Despite the unique properties of titanium and its alloys, to meet the above-mentioned requirement, associated with high biocompatibility, the implant surfaces must be modified by appropriate mechanical or chemical treatments or by forming composite coatings on them [4,5,6,7]. Moreover, the modified surface of the implant must be resistant to mechanical damage, abrasion, and infections, and it must show biocompatibility [8]. The results of previous works indicate that the formation of titania nanotube (TNT) layers on the implant surface improves its osseointegration while maintaining appropriate mechanical properties [4,5,9,10].…”

Section: Introductionmentioning

confidence: 99%

Titania Nanotubes/Hydroxyapatite Nanocomposites Produced with the Use of the Atomic Layer Deposition Technique: Estimation of Bioactivity and Nanomechanical Properties

et al. 2019

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Titanium dioxide nanotubes/hydroxyapatite nanocomposites were produced on a titanium alloy (Ti6Al4V/TNT/HA) and studied as a biocompatible coating for an implant surface modification. As a novel approach for this type of nanocomposite fabrication, the atomic layer deposition (ALD) method with an extremely low number of cycles was used to enrich titania nanotubes (TNT) with a very thin hydroxyapatite coating. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used for determination of the structure and the surface morphology of the fabricated nanocoatings. The biointegration activity of the layers was estimated based on fibroblasts’ proliferation on the TNT/HA surface. The antibacterial activity was determined by analyzing the ability of the layers to inhibit bacterial colonization and biofilm formation. Mechanical properties of the Ti6Al4V/TNT/HA samples were estimated by measuring the hardness, Young’s module, and susceptibility to scratching. The results revealed that the nanoporous titanium alloy coatings enriched with a very thin hydroxyapatite layer may be a promising way to achieve the desired balance between biofunctional and biomechanical properties of modern implants.

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“…In the biomedical field, elemental EDS analysis is used for many purposes, including the detection of heavy residual elements in tissues and organs [ 13 ], the analysis of mineral deposits (stones formed in various organs) and calcified tissues present in the body (Ca, P, Mg) [ 14 ] with supporting role in the skeletal system [ 14 , 15 ]. Numerous studies have approached both morphological [ 16 ] and compositional [ 17 , 18 ] methods for the analysis of calcium phosphate composition [ 19 , 20 , 21 ]. In some studies, EDS analysis was used to evaluate the chemical composition of the median aortic calcification [ 22 ] and the genesis of Ca and P deposits in atheroma plaques [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

“…The range of calcium phosphates (CPs) is very diverse [ 24 ], with some of them having wide applicability in the biomedical field [ 17 , 19 ]. The best known and used compounds of this type are hydroxyapatite (HAP), and alpha- and beta-tricalcium phosphates (α-TCPs and β-TCPs) [ 6 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Considerations and Influencing Parameters in EDS Microanalysis of Biogenic Hydroxyapatite

Miculescu

Luță

Constantinescu

et al. 2020

JFB

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Calcium phosphates (CPs) used as biomaterials have been intensively studied in recent years. In most studies, the determination of the chemical composition is mandatory. Due to the versatility and possibilities of performing qualitative and quantitative compositional analyses, energy dispersive spectrometry (EDS) is a widely used technique in this regard. The range of calcium phosphates is very diverse, the first method of approximating the type of compound being EDS microanalysis, by assessing the atomic Ca/P ratio. The value of this ratio can be influenced by several factors correlated with instrumental parameters and analysed samples. This article highlights the influence of the electron beam acceleration voltage (1 kV–30 kV) and of the particle size of calcium phosphate powders on the EDS analysis results. The characterised powders were obtained from bovine bones heat-treated at 1200 °C for 2 h, which have been ground and granulometrically sorted by mechanical vibration. The granulometric sorting generated three types of samples, with particle sizes < 20 μm, < 40 μm and < 100 μm, respectively. These were morphologically and dimensionally analysed by scanning electron microscopy (SEM) and compositionally by EDS, after the spectrometer was calibrated with a standard reference material (SRM) from NIST (National Institute of Standards and Technology). The results showed that the adjusting of acceleration voltage and of the powder particle size significantly influences the spectrum profile and the results of EDS analyses, which can lead to an erroneous primary identification of the analysed calcium phosphate type.

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Influence of deposition temperature on the properties of hydroxyapatite obtained by electrochemical assisted deposition

Cited by 53 publications

References 74 publications

One-Step Bark-Like Imitated Polypropylene (PP)/Polycarbonate (PC) Nanofibrous Meltblown Membrane for Efficient Particulate Matter Removal

One-Step Bark-Like Imitated Polypropylene (PP)/Polycarbonate (PC) Nanofibrous Meltblown Membrane for Efficient Particulate Matter Removal

Titania Nanotubes/Hydroxyapatite Nanocomposites Produced with the Use of the Atomic Layer Deposition Technique: Estimation of Bioactivity and Nanomechanical Properties

Considerations and Influencing Parameters in EDS Microanalysis of Biogenic Hydroxyapatite

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