Direct hydrothermal synthesis of hydroxyapatite/alumina nanocomposite

Sivaperumal, Vignesh Raj; Mani, R. Jothi; Sundaram, Nachiappan Meenakshi; Kandaswamy, A.

doi:10.1016/j.matchar.2017.11.016

Cited by 31 publications

(20 citation statements)

References 39 publications

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“…When the aging temperature was as high as 80°C, the peak heights of the produced HAP (especially the one at 2θ = 31.9°) are much higher than those of the 3d50. This result suggests that higher aging temperature can improve the yield and crystallinity of the produced HAP (14,28,29). Figure 2 also shows that the heights of peaks corresponding to dolomite, monetite, and calcite reduced when more HAP was produced, and when calcite and dolomite in the WP were consumed by the DAP solution to generate HAP.…”

Section: Characterization Analysismentioning

confidence: 89%

“…This is because HAP particles grew larger or fused into large particles, as shown in Figure 5. Larger surface area is desirable for adsorbing heavy metals (12,29). Figure 6 shows that there exist an optimal duration and temperature of aging, at which the BET surface area of the produced WP-HAP reaches the maximum.…”

Section: Morphological Evolution Of the Produced Wp-hap Samplesmentioning

confidence: 99%

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Preliminary study on the upcycle of non-structural construction and demolition waste for waste cleaning

Chen

Wang

et al. 2020

Mater. construcc.

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This study proposes a method to convert non-structural calcium-rich construction and demolition waste fines into adsorbents of heavy metal ions by mixing waste fines with diammonium hydrogen phosphate solution to produce hydroxyapatite, which has high surface areas and excellent ion-exchange capacity with heavy metal ions. As a result, environmental polluting waste is converted into environmentally cleaning material. Waste putty powders was chosen as the representative waste to investigate the detailed formation process of hydroxyapatite and the key reaction parameters of the reaction. Results showed that hydroxyapatite can be produced on waste putty particles. Higher ageing temperatures or longer ageing duration are beneficial to the yield and crystallinity of the produced hydroxyapatite. Adsorption testing confirmed that Ni 2+ can replace Ca 2+ in the hydroxyapatite lattice, leading to the formation of a new crystal, arupite (Ni 3 (PO 4 ) 2 •8H 2 O), and contributing to a modest adsorption capacity for Ni 2+ (15 mg/g) for the hydroxyapatite-containing waste putty. Citation/Citar como: Chen, P.; Chen, X.; Wang, Y.; Wang, P. (2020) Preliminary Study on the Upcycle of Non-structural Construction and Demolition Waste for Waste Cleaning. Mater. Construcc. 70 [338], e220 https://doi.org/10.3989/ mc.2020.13819 RESUMEN:Estudio preliminar sobre el empleo de residuos de construcción y demolición no estructurales para la eliminación de residuos. Este estudio propone un método para convertir residuos de construcción y demolición no estructurales, ricos en calcio y pulverulentos, en adsorbentes de iones de metales pesados mezclándolos con una solución de hidrógenofosfato de diamonio para generar hidroxiapatita, la cual presenta una elevada área superficial y una excelente capacidad de intercambio iónico de iones de metales pesados. De este modo, un residuo contaminante se convierte en un material que limpia el medio ambiente. Se seleccionó residuo en forma de masilla en polvo como residuo representativo para investigar en detalle los procesos de formación de hidroxiapatita y los parámetros clave implicados en la reacción. Los resultados mostraron que la hidroxiapatita se puede producir en las partículas de los residuos empleados. La producción y la cristalinidad de la hidroxiapatita se ve favorecida por temperaturas de envejecimiento elevadas y prolongadas. Los ensayos de adsorción confirmaron que el Ni 2+ puede sustituir al Ca 2+ en la estructura de la hidroxiapatita, formándose un nuevo mineral, arupita (Ni 3 (PO 4 ) 2 •8H 2 O), y contribuyendo a una adsorción modesta de Ni 2+ (15 mg/g) por parte de la masilla de residuos con hidroxiapatita.

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Section: Characterization Analysismentioning

confidence: 89%

Section: Morphological Evolution Of the Produced Wp-hap Samplesmentioning

confidence: 99%

Preliminary study on the upcycle of non-structural construction and demolition waste for waste cleaning

Chen

Wang

et al. 2020

Mater. construcc.

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“…Kalmodia et al [ 145 ] manufactured a HAp -Alumina (Al 2 O 3 ) -multiwalled carbon nanotubes (CNTs) composite. Previous, separate studies showed an enhancement of fracture toughness of the HAp matrix using individual Al 2 O 3 reinforcement [ 146 , 147 ] and CNT reinforcement [ 72 , 93 , 98 , 99 ]. In this study, researchers were interested in investigating the combined reinforcing effect of CNT and Al 2 O 3 in a HAp matrix.…”

Section: Other Systems Involving Carbon Structures and Hydroxyapatmentioning

confidence: 99%

A Review on the Use of Hydroxyapatite-Carbonaceous Structure Composites in Bone Replacement Materials for Strengthening Purposes

2018

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Biomedical materials constitute a vast scientific research field, which is devoted to producing medical devices which aid in enhancing human life. In this field, there is an enormous demand for long-lasting implants and bone substitutes that avoid rejection issues whilst providing favourable bioactivity, osteoconductivity and robust mechanical properties. Hydroxyapatite (HAp)-based biomaterials possess a close chemical resemblance to the mineral phase of bone, which give rise to their excellent biocompatibility, so allowing for them to serve the purpose of a bone-substituting and osteoconductive scaffold. The biodegradability of HAp is low (Ksp ≈ 6.62 × 10−126) as compared to other calcium phosphates materials, however they are known for their ability to develop bone-like apatite coatings on their surface for enhanced bone bonding. Despite its favourable bone regeneration properties, restrictions on the use of pure HAp ceramics in high load-bearing applications exist due to its inherently low mechanical properties (including low strength and fracture toughness, and poor wear resistance). Recent innovations in the field of bio-composites and nanoscience have reignited the investigation of utilising different carbonaceous materials for enhancing the mechanical properties of composites, including HAp-based bio-composites. Researchers have preferred carbonaceous materials with hydroxyapatite due to their inherent biocompatibility and good structural properties. It has been demonstrated that different structures of carbonaceous material can be used to improve the fracture toughness of HAp, as they can easily serve the purpose of being a second phase reinforcement, with the resulting composite still being a biocompatible material. Nanostructured carbonaceous structures, especially those in the form of fibres and sheets, were found to be very effective in increasing the fracture toughness values of HAp. Minor addition of CNTs (3 wt.%) has resulted in a more than 200% increase in fracture toughness of hydroxyapatite-nanorods/CNTs made using spark plasma sintering. This paper presents a current review of the research field of using different carbonaceous materials composited with hydroxyapatite with the intent being to produce high performance biomedically targeted materials.

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“…So far, several reinforcements are used to enhance the properties of HAp such as TiO 2 [14], Al 2 O 3 [14][15][16][17], high content of strontium (Sr)-incorporated calcium deficient hydroxyapatite [5], hydroxyapatite nanoparticles (HANPs) [6], MgO, ZrO 2 [10,14], etc. Among these various additives alumina, which is a bioinert material, presents certain advantages such as excellent corrosion resistance, high wear resistance, high compressive strength and high hardness.…”

Section: Introductionmentioning

confidence: 99%

“…Among these various additives alumina, which is a bioinert material, presents certain advantages such as excellent corrosion resistance, high wear resistance, high compressive strength and high hardness. The addition of high amount of alumina (macro-sized or nanostructured) is well documented in literature [2][3][4][14][15][16]. However the addition of small amount of alumina to the HAp matrix is scarcely investigated.…”

Section: Introductionmentioning

confidence: 99%

Production, characterization and properties of open-cell calcium phosphate foams reinforced with alumina

et al. 2019

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In this study, tailored made open-cell calcium phosphate foams reinforced with alumina were fabricated by employing a dissolution-sintering process, using crystalline raw cane sugar as a water-leachable material. The effect of the alumina addition in the 3D morphology and in the microstructure of the produced calcium phosphate-based foams was examined. Preliminary in vitro bio-dissolution studies were performed to obtain an initial indication for the suitability of these composite bioceramic foams as implant materials. The mechanical properties of the produced composite calcium phosphate foams were also evaluated. It was found that the addition of small amount of alumina (5 wt%) resulted in a microstructural alteration affecting both the 3D geometry of the produced bioceramic foams and the morphology of the precipitated apatite during the biodegradation tests. The addition of alumina resulted in considerable enhancement of the mechanical strength of the bioceramic foam when the porosity was above 70%. The produced calcium phosphatebased composite foams (with alumina reinforcement) are suitable for biomedical applications.

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Direct hydrothermal synthesis of hydroxyapatite/alumina nanocomposite

Cited by 31 publications

References 39 publications

Preliminary study on the upcycle of non-structural construction and demolition waste for waste cleaning

Preliminary study on the upcycle of non-structural construction and demolition waste for waste cleaning

A Review on the Use of Hydroxyapatite-Carbonaceous Structure Composites in Bone Replacement Materials for Strengthening Purposes

Production, characterization and properties of open-cell calcium phosphate foams reinforced with alumina

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