Precipitation of biomimetic fluorhydroxyapatite/polyacrylic acid nanostructures

Roche, Kevin; Stanton, Kenneth T.

doi:10.1016/j.jcrysgro.2014.10.002

Cited by 14 publications

(8 citation statements)

References 70 publications

(104 reference statements)

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“…Micrographs of (F)HA synthesised in the absence of polymer showed lower levels of particle aggregation compared to micrographs of (F)HA synthesis in the presence of both linear and hyperbranched PAA. Such behaviour has been observed previously 25 and is likely due to the charged polymer bridging individual crystallites, resulting in flocculation. However, it cannot be ruled out that this is an artefact of drying in the presence of PAA.…”

Section: Transmission Electron Microscopysupporting

confidence: 76%

“…As an indication of solution size, radii of gyration (R g ) were determined by diffusion-ordered NMR spectroscopy analysis 24 (see ESI for details) as 2.4 and 4.9 nm for PAA-VPC and PAA-VBD, respectively. Synthesis of PAA-(fluor)hydroxyapatite composites: Nanoparticles of fluorhydroxyapatite (FHA) and hydroxyapatite (HA) were synthesised according to a literature procedure 25 in the presence of hyperbranched PAAs synthesised using either CTA 1 or 2. Additionally, (F)HA was synthesised in the presence of commercial linear PAAs with molar masses of 9 kDa (Versicol E5) and 210 kDa (Versicol E11), and the absence of polymer (NoP) for comparison and to act as controls.…”

Section: Synthesis Of Hyperbranched Poly(acrylic Acid)mentioning

confidence: 99%

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The effect of hyperbranched poly(acrylic acid)s on the morphology and size of precipitated nanoscale (fluor)hydroxyapatite

et al. 2017

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Section: Transmission Electron Microscopysupporting

confidence: 76%

Section: Synthesis Of Hyperbranched Poly(acrylic Acid)mentioning

confidence: 99%

The effect of hyperbranched poly(acrylic acid)s on the morphology and size of precipitated nanoscale (fluor)hydroxyapatite

et al. 2017

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“…Fluorine and chlorine are two very important monovalent anions, which can substitute OH − group inside the HA crystal lattice. Substitution of F − inside the lattice structure improves the chemical stability of the HA phase [149]. Due to the smaller size of fluorine, the lattice parameter "a" contracts with increments in the fluorine content.…”

Section: Anionic Substitutionmentioning

confidence: 99%

Doped biphasic calcium phosphate: synthesis and structure

Basu

2019

Journal of Asian Ceramic Societies

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Hydroxyapatite, tricalcium phosphate, and a mixture of these, i.e biphasic calcium phosphate (BCP), are widely employed as ceramic materials in hard tissue engineering, despite their poor mechanical and functional properties. The method of ionic substitution inside their lattice structures has been examined extensively by researchers in their long efforts to develop materials, that closely resemble natural hard tissues. The presence of dopants has a deep impact on the phase assemblage, structural, and functional behaviors of BCP. In this context, the goal of the current article is to cover different aspects of ongoing research on doped biphasic calcium phosphate. Apart from providing brief descriptions of different synthesis routes for producing ion-modified BCPs, the limitations of each technique are also discussed. In addition, particular emphasis has been given to describing the key experimental results, which elucidate the structural changes occurring due to doping. In particular, the preferable substitution sites of different dopant ions and the resulting crystallographic changes are depicted quite elaborately. Finally, the effects of substitution on biological and mechanical properties of BCP are briefly mentioned. In summary, the present review focuses on the ionic substitutions in BCP systems and their collective effects on material behaviors.

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“…To investige the interaction between PAAS and ultralong HAP nanowires, FTIR spectra were measured. As shown in Figure a, the absorption peaks between 1560 and 1600 cm –1 are the characteristic peaks of the cation-bonded −COO – group, and the position of the absorption peak depends on the cations . The FTIR spectrum of the pure PAAS displays an absorption peak of the cation-bonded −COO – group centered at 1560 cm –1 , and this peak shifts to 1564 cm –1 for the HAP/PAAS ribbon fiber.…”

Section: Results and Discussionmentioning

confidence: 94%

Bioinspired Macroscopic Ribbon Fibers with a Nacre-Mimetic Architecture Based on Highly Ordered Alignment of Ultralong Hydroxyapatite Nanowires

et al. 2018

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A variety of biological materials in natural organisms supply a rich source of structural design guidelines and inspirations for the construction of advanced structural materials with excellent mechanical properties. In this work, inspired by the natural nacre and human bone, a kind of flexible macroscopic ribbon fiber made from highly ordered alignment of ultralong hydroxyapatite (HAP) nanowires and sodium polyacrylate (PAAS) with a “brick-and-mortar” layered structure has been developed by a scalable and convenient wet-spinning method. The quasi-long-range orderly liquid crystal of one-dimensional ultralong hydroxyapatite nanowires is employed and spun into the continuous flexible macroscopic ribbon fiber. In this work, highly ordered ultralong HAP nanowires act as the hard “brick” and PAAS acts as the soft “mortar”, and the nacre-mimetic layered architecture is obtained. The as-prepared flexible macroscopic HAP/PAAS ribbon fiber exhibits superior mechanical properties, and the maximum tensile strength and Young’s modulus are as high as 203.58 ± 45.38 MPa and 24.56 ± 5.35 GPa, respectively. In addition, benefiting from the excellent flexibility and good knittability, the as-prepared macroscopic HAP/PAAS ribbon fiber can be woven into various flexible macroscopic architectures. Additionally, the as-prepared flexible macroscopic HAP/PAAS ribbon fiber can be further functionalized by incorporation of various functional components, such as magnetic and photoluminescent constituents. The as-prepared flexible macroscopic HAP/PAAS ribbon fiber has potential applications in various fields such as smart wearable devices, optical devices, magnetic devices, and biomedical engineering.

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Precipitation of biomimetic fluorhydroxyapatite/polyacrylic acid nanostructures

Cited by 14 publications

References 70 publications

The effect of hyperbranched poly(acrylic acid)s on the morphology and size of precipitated nanoscale (fluor)hydroxyapatite

The effect of hyperbranched poly(acrylic acid)s on the morphology and size of precipitated nanoscale (fluor)hydroxyapatite

Doped biphasic calcium phosphate: synthesis and structure

Bioinspired Macroscopic Ribbon Fibers with a Nacre-Mimetic Architecture Based on Highly Ordered Alignment of Ultralong Hydroxyapatite Nanowires

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