Effect of thermal treatment on the physico-chemical properties of bioactive hydroxyapatite derived from caprine bone bio-waste

Barua, Emon; Das, Apurba K.; Pamu, D.; Deoghare, Ashish B.; Deb, Payel; Lala, Sumit Das; Chatterjee, Sushovan

doi:10.1016/j.ceramint.2019.08.023

Cited by 37 publications

(15 citation statements)

References 51 publications

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“…The XRD patterns of the coating before the flame test show the presence of the main crystalline phases of CaCO 3 , KMgPO 4 ·6H 2 O, and MgO; after the flame test, new peaks attributed to KMgPO 4 , Ca 5 (PO 4 ) 3 (OH) (HAP), and CaO are also assessed in the XRD patterns ( Figure 10 b). Based on these results correlated with the literature [ 17 , 18 , 19 , 20 ] one can also consider the formation of HAP (or apatite phases [ 20 ]) with a low crystallinity degree in the reaction of the phosphate solution with calcium carbonate (at longer curing periods—up to 28 days) and its crystallization at the increase in temperature (during the flame test).…”

Section: Resultssupporting

confidence: 69%

Coatings Based on Phosphate Cements for Fire Protection of Steel Structures

et al. 2021

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Fire events in buildings can cause losses to human life and important material damage, therefore a great deal of attention is paid nowadays to fire prevention. Buildings based on steel structures are especially affected in the event of a fire, due to the important loss of load-bearing capability when steel is heated at temperatures higher than 500 °C. Therefore, one possible method to mitigate the deleterious effect of fire is to protect steel structures from direct heating by applying protective coatings. In this paper, the ability of magnesium phosphate cement (MPC), based on dead burned magnesite and calcium magnesium phosphate cement (CMPC) coatings, to protect a steel substrate was assessed. CMPCs were obtained by mixing partially calcined dolomite with a KH2PO4 (MKP) solution, and in some cases, with a setting retarder (borax). The main mineralogical compounds assessed by X-ray diffraction and electronic microscopy (SEM-EDS) in CMPC are MgO, CaCO3, and K-struvite (KMgPO4·6H2O). The coatings based on MPC and CMPC, applied to steel plates, were tested in direct contact with a flame; the coatings of MPC and CMPC without the borax addition prevented the temperature increase of a metal substrate above 500 °C. No exfoliation of coatings (MPC and CMPC without borax addition) was noticed during the entire period of the test (45 min).

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Section: Resultssupporting

confidence: 69%

Coatings Based on Phosphate Cements for Fire Protection of Steel Structures

et al. 2021

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“…The analysis was performed at 35 kV and 30 mA using Cu Kα radiation (λ = 1.5405980 Å) over scanning angle (2θ) ranged between 5° and 80° at a step size of 0.06° (Bruker, D8‐advance). Furthermore, the crystal sizes of the powders were calculated by Scherrer Equation ():

D = \frac{K λ}{β c o s θ}

where D denotes the crystallite size, K is the shape factor varying with different crystal morphologies and chosen as 0.89 for spherical crystallites, 27,28 λ signifies the wavelength of Cu Kα radiation (1.5405980 Å), β is the full width at half maximum or FWHM (in radian), and θ corresponds to the peak position. The percentages of crystallinity (Xc%) in the HA powders were estimated by Equation ():

X_{c} % = [1 ‐ ()(V_{\frac{112}{300}} / I_{300})] \times 100

…”

Section: Methodsmentioning

confidence: 99%

“…where D denotes the crystallite size, K is the shape factor varying with different crystal morphologies and chosen as 0.89 for spherical crystallites, 27,28 λ signifies the wavelength of Cu Kα radiation (1.5405980 Å), β is the full width at half maximum or FWHM (in radian), and θ corresponds to the peak position. The percentages of crystallinity (Xc%) in the HA powders were estimated by Equation (3):…”

Section: Phase Analyses and Crystal Sizementioning

confidence: 99%

Low‐cost synthesis of nano‐hydroxyapatite from carp bone waste: Effect of calcination time and temperature

Bahraminasab

Doostmohammadi

Alizadeh

2021

Int J Applied Ceramic Tech

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is a common and popular biomaterial for bone regeneration. About 70% of bone structure and essentially all of the enamel in teeth are composed of HA. It has been used in orthopedic and dental applications such as dental implants, bone grafts, orthopedic implants, and bone scaffolds. [1][2][3][4][5] The reason is the excellent bioactivity, adequate mechanical characteristics, osteoconductive, and angiogenic properties, without toxicity, inflammatory, or antigenic reactions. 6 Nano-hydroxyapatite (nano-HA), particularly, is considered as one of the most biocompatible and bioactive materials that has been used and accepted in orthopedics and dentistry. [7][8][9] For example, it has been extensively used in periodontics and in oral and maxillofacial surgical procedures. The inorganic part of bone extra cellular matrix (ECM) contains nano-sized crystallites of calcium phosphate similar to HA. 10 Nano-HA has an outstanding osteoinductive capacity and improves bone-to-implant integration. 11 This nanomaterial also has been employed in the products used for oral care to treat the dentin hypersensitivity (DH) and promote enamel demineralization. It has been shown that nano-HA is capable of reducing the pain associated with DH because the nanoparticles are very small and can readily enter and fill the tubules in dentin. These nanoparticles precipitate inside the dentin tubules and block the nerves interaction with the external stimuli. They can also set down onto the surface of enamel and demineralize the early enamel caries, leading to a new apatite layer formation, which subsequently increases the enamel surface hardness and therefore prevents the tooth decay. These benefits are due to high similarity of morphology and crystal structure of nano-HA with tooth enamel. 12,13 HA can be simply synthesized or extracted from the natural sources, including eggshell, seashell, bovine, or fish bones. [14][15][16][17][18] Fish bone as an alternative natural source for HA production recently has received a lot of attention because of low cost and easy manufacturing regarding the many

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“…The temperature calcination will also be the crystallite size shown in Figure 2 between caprine bone [35], fish scale [22], chicken bone [43], and fishbone [44]. An increase in temperature will increase the size of crystallite [22,42].…”

Section: Fig 2 Comparison Of Crystallite Sizes From Several Ha Sourcesmentioning

confidence: 99%

Review of the temperature and holding time effects on hydroxyapatite fabrication from the natural sources

Nurhidayat

Bayuseno

Ismail

et al. 2021

JBIOMES

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Biomaterial development is currently being carried out to help people who have daily needs. Hydroxyapatite has biocompatibility properties and suitables for the use as a biomaterial. Hydroxyapatite can be found in natural sources sometimes as waste. One of the hydroxyapatite fabrication methods is calcination process. Calcination and sintering are used to obtain the desired Ca/P ratio of the hydroxyapatite. This paper reviews several research which have been published by researchers to withdraw the connection during calcination process, with respect to the temperature and holding time effects on hydroxyapatite fabrication from the natural organism. The effect of temperature and holding time determines the yield of Ca/P ratio which affects the resulting mechanical properties. Choosing the right temperature and holding time will produce Ca/P which meets the standard

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Effect of thermal treatment on the physico-chemical properties of bioactive hydroxyapatite derived from caprine bone bio-waste

Cited by 37 publications

References 51 publications

Coatings Based on Phosphate Cements for Fire Protection of Steel Structures

Coatings Based on Phosphate Cements for Fire Protection of Steel Structures

Low‐cost synthesis of nano‐hydroxyapatite from carp bone waste: Effect of calcination time and temperature

Review of the temperature and holding time effects on hydroxyapatite fabrication from the natural sources

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