Ultralong hydroxyapatite nanofibers/organics composite film for improving its mechanical property: Effect of proportions

Yan, Wenxi; Wang, Yinchuan; Huang, Shengyun; Xiao, Gui‐yong; Lu, Yu‐peng

doi:10.1002/pc.26862

Cited by 2 publications

(1 citation statement)

References 51 publications

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“…The spectra of the as-prepared products obtained within reaction time ranging from 3 to 30 h exhibited remarkable similarity. The absorption bands identified at 3570 and 629 cm –1 correspond to the vibration mode of the OH – group in the HA crystal. , The broad band observed at 3422 cm –1 is ascribed to the O–H vibration of H 2 O absorbed on the surface of some samples. The bands appeared at approximately 1093, 1027, 961, 604, and 561 cm –1 are the characteristic bands of the PO 4 3– group in the samples. , Specifically, 1093 and 1027 cm –1 represent v 3 antisymmetric P–O stretching, 961 cm –1 denotes v 1 symmetric P–O stretching, and 604 and 561 cm –1 indicate v 4 O–P–O bending vibrations .…”

Section: Resultsmentioning

confidence: 98%

Temporal and Thermal Effects on the Microstructural and Compositional Evolution of Ultralong Flexible Hydroxyapatite Nanofibers

Wang,

Qiu,

Xue

et al. 2024

Crystal Growth & Design

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The oleic acid-assisted solvothermal method has been widely employed for synthesizing ultralong flexible hydroxyapatite (HA) nanofibers. However, a detailed exploration into the nucleation and crystal growth processes of HA nanofibers induced by oleic acid remains lacking. In this study, the evolution process of HA nanofiber microstructure and composition was systematically explored based on gradient changes in solvothermal temperature and time. Results revealed that the initially formed amorphous calcium phosphate (ACP) nanoparticles and low-crystallinity HA whiskers eventually transformed into ultralong flexible HA nanofibers with high crystallinity under high-temperature and high-pressure conditions (180 °C). Both insufficient reaction time (≤18 h) and low-temperature conditions (120−160 °C) led to some ACP remaining. Based on the evolving microstructure and composition of the products, a reasonable formation mechanism for HA nanofibers was proposed to enhance the understanding of their nucleation and crystal growth processes.

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Section: Resultsmentioning

confidence: 98%

Temporal and Thermal Effects on the Microstructural and Compositional Evolution of Ultralong Flexible Hydroxyapatite Nanofibers

Wang,

Qiu,

Xue

et al. 2024

Crystal Growth & Design

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Tightly anchoring bone‐like coating on the surface of titanium implants with complex three‐dimensional geometry through radical polymerization

et al. 2023

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Biological fixation of a Ti implant demonstrates significant advantages over conventional physical fixation. Modifying the surface of Ti implants with hydroxyapatite (HAp) coating has proven to be a promising strategy to enhance their bone integration capability in vivo. The currently reported strategies are confronted with the following problems: (i) low interfacial bonding strength and poor structural stability under mechanical force; (ii) being incapable of encapsulating Ti implants with complex 3D geometry; (iii) complicated processing procedures and high processing costs. Here, we fabricated a bone‐like polyacrylamide/poly(vinyl alcohol)/HAp (PAAm/PVA/HAp) coating on the surface of Ti implants with complex 3D geometry through thermal induced in situ radical polymerization of pre‐adhered vicious acrylamide/PVA/HAp (AAm/PVA/HAp) emulsion. Covalent interaction between the Ti matrix and the coating was constructed through incorporating vinyl groups on the surface of Ti matrix using 3‐(trimethoxysilyl)propyl methacrylate (TMSPMA). The as‐prepared coating demonstrated a record high shear bonding strength of 144.5 MPa and 75.50 MPa in dry and moist states, respectively. In addition, its interfacial toughness reached to 1.27 kJ/m2, while its maximum motion under shear mechanical force was only 0.64 mm (moist state). Anti‐fatigue tests (approximate 100% toughness retention rate at displacement of 0.1 mm) and degradation experiment exhibited the long‐term mechanical/structural stability of the coating in a in vivo environment. BMSCs co‐culture assay demonstrated the superior cytocompatibility and osteogenic property of the coating. In sum, this work provided a simple and cost‐effective strategy to construct homogeneous and tightly anchored HAp coating on the surface of Ti implants with complex 3D geometry.Highlights Homogeneous coating on Ti surface with bone‐like composition and structure. Being capable of encapsulating Ti implants with complex 3D geometry. Record high interfacial bonding strength/toughness. long‐term structural/mechanical stability in a moist environment. Superior biocompatibility and osteogenic property.

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Ultralong hydroxyapatite nanofibers/organics composite film for improving its mechanical property: Effect of proportions

Abstract: Ultralong hydroxyapatite nanofibers (UHANFs) have received much more attention and been widely used in recent years for their inherent sizedependent properties. However, the intrinsic agglomeration and brittleness of this material limited its application in some aspects. To overcome the

Cited by 2 publications

References 51 publications

Temporal and Thermal Effects on the Microstructural and Compositional Evolution of Ultralong Flexible Hydroxyapatite Nanofibers

Temporal and Thermal Effects on the Microstructural and Compositional Evolution of Ultralong Flexible Hydroxyapatite Nanofibers

Tightly anchoring bone‐like coating on the surface of titanium implants with complex three‐dimensional geometry through radical polymerization

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