The investigation of nanotribology of UHMWPE in fluid using atomic force microscopy

Wu, Jingping; Peng, Zhongxiao

doi:10.1002/jbm.b.33249

Cited by 4 publications

(6 citation statements)

References 52 publications

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“…As can be seen in Figure 7, a large amount of wear debris were seen on the worn surfaces of CFRPEEK in different load conditions, leading to higher pile-ups than on neat PEEK. The material pile-up effect was severe at the end of the scratch, which is similar to the results obtained in a previous study [13]. Larger pile-up height is closely related to higher contact pressure and shear force, indicating easier formation of the wear debris.…”

Section: Discussionsupporting

confidence: 89%

“…Recently investigations on the tribological characteristics of biomedical polymers are being transferred from the macroscale to the microscale [13], which is of importance for developing an understanding of the interfacial phenomena of the tested samples in a small scale. From the biomedical applications (e.g., artificial joints) point of view, multiple asperity contacts occur during the sliding between two surfaces articulated against each other, leading to the microscale contact of the components in artificial joints.…”

Section: Discussionmentioning

confidence: 99%

“…Nanotribology, also called micro-tribology or molecular tribology, focuses on the friction, lubrication, and wear behaviors of interacting surfaces in relative motion at the nanometer scale, which is valuable in understanding the interfacial behaviors in macrostructures to provide a bridge between science and engineering [12]. Wu et al [13] evaluated the nanoscale tribological performances of the metal asperity-on-UHMWPE interface using atomic force microscopy (AFM) and suggested that plastic deformation and material accumulation take place with an increase in normal loads. Similar work was conducted by Ho et al [14].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Nanomechanical and Nanotribological Behaviors of PEEK and CFRPEEK for Biomedical Applications

et al. 2018

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Abstract:This study was to investigate the nanomechanical and nanotribological properties of polyether ether ketone (PEEK)-based composites for biomedical applications and to gain a fundamental understanding of the effects of carbon fibers in carbon-fiber-reinforced PEEK (CFRPEEK) on the mechanical properties and wear performance in a microscale. Nanoindentation tests with a Berkovich indenter and nanoscratch experiments with a diamond stylus were performed on PEEK and CFRPEEK samples. The nanowear features and mechanisms of the tested samples were analyzed using 3D white-light interfering profilometry and scanning electron microscopy (SEM). The obtained results indicated that the reinforced carbon fibers increased the nanohardness and elastic modulus and decreased the friction coefficient and wear rate of PEEK. Different to many existing studies where a constant load was used in a nanoscratch test and the normal load was a key factor influencing the scratch performances of the tested specimens, stick-slip phenomena were observed on both PEEK and CFRPEEK in the nanoscratch tests with load increasing progressively. In constant load conditions, it was found that the major nanowear mechanisms of PEEK are adhesion, abrasion, and plastic deformation, while the nanowear mechanisms of CFRPEEK are dominated by severe adhesive wear, abrasive wear and mild fatigue. CFRPEEK has demonstrated superior nanomechanical and nanotribological performances, and hence can be considered a potential candidate for biomedical applications.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on the Nanomechanical and Nanotribological Behaviors of PEEK and CFRPEEK for Biomedical Applications

et al. 2018

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“…Recently, the incorporation of ceramics such as bioactive glasses into the PCL matrix has yielded a class of hybrid biomaterials with remarkably improved mechanical properties and enhanced bioactivity that are suitable for the effective treatment of bone injuries [19,35,[40][41][42]. Moreover, the development of gradient scaffolds, which can be either isotropic or anisotropic, has drawn attention.…”

Section: Significance Of the Resultsmentioning

confidence: 99%

Nanomechanical Mapping of Three Dimensionally Printed Poly-ε-Caprolactone Single Microfibers at the Cell Scale for Bone Tissue Engineering Applications

Bontempi,

Marchiori,

Petretta

et al. 2023

Biomimetics

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Poly-ε-caprolactone (PCL) has been widely used in additive manufacturing for the construction of scaffolds for bone tissue engineering. However, its use is limited by its lack of bioactivity and inability to induce cell adhesion, hence limiting bone tissue regeneration. Biomimicry is strongly influenced by the dynamics of cell–substrate interaction. Thus, characterizing scaffolds at the cell scale could help to better understand the relationship between surface mechanics and biological response. We conducted atomic force microscopy-based nanoindentation on 3D-printed PCL fibers of ~300 µm thickness and mapped the near-surface Young’s modulus at loading forces below 50 nN. In this non-disruptive regime, force mapping did not show clear patterns in the spatial distribution of moduli or a relationship with the topographic asperities within a given region. Remarkably, we found that the average modulus increased linearly with the logarithm of the strain rate. Finally, a dependence of the moduli on the history of nanoindentation was demonstrated on locations of repeated nanoindentations, likely due to creep phenomena capable of hindering viscoelasticity. Our findings can contribute to the rational design of scaffolds for bone regeneration that are capable of inducing cell adhesion and proliferation. The methodologies described are potentially applicable to various tissue-engineered biopolymers.

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“…Although surface roughness and hydrophilicity can inuence each other, surface modications can tune the hydrophilicity of both cpTi and ZrO 2 , independent of its surface roughness. 65,66 For instance, sandblasted and acid-etched (SLA) cpTi dental implants possess a signicantly more hydrophilic, modied SLA (modSLA) surface, which improved bone cell response in vitro and in vivo. 67 Aside from proliferation, pre-osteoblasts demonstrated an increase in differentiation as measured by the increase in fold change of ALP activity over the span of 7, 10, and 14 days (Fig.…”

Section: Mammalian Cellular Growthmentioning

confidence: 99%

Biological characterization of surface-treated dental implant materials in contact with mammalian host and bacterial cells: titanium versus zirconia

et al. 2019

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The investigation of nanotribology of UHMWPE in fluid using atomic force microscopy

Cited by 4 publications

References 52 publications

Study on the Nanomechanical and Nanotribological Behaviors of PEEK and CFRPEEK for Biomedical Applications

Study on the Nanomechanical and Nanotribological Behaviors of PEEK and CFRPEEK for Biomedical Applications

Nanomechanical Mapping of Three Dimensionally Printed Poly-ε-Caprolactone Single Microfibers at the Cell Scale for Bone Tissue Engineering Applications

Biological characterization of surface-treated dental implant materials in contact with mammalian host and bacterial cells: titanium versus zirconia

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