Influence of surface PMPC brushes on tribological and biocompatibility properties of UHMWPE

Xiong, Dangsheng; Deng, Yaling; Wang, Nan; Yang, Yuanyuan

doi:10.1016/j.apsusc.2014.01.088

Cited by 48 publications

(22 citation statements)

References 19 publications

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“…[ 61 ] The UHMWPE is favourable as a top layer for its better wear resistance properties compared to other polymers. [ 62 ] A coating thickness of more than 1 μm including an interlayer may be beneficial because very thin DLC layers produce pinholes during sliding. [ 8 ] The working lubricant can penetrate through these pinholes and thus increase the corrosion rate.…”

Section: Surface Modification Techniques and Their Recent Developmentmentioning

confidence: 99%

Status of surface modification techniques for artificial hip implants

Ghosh

Abanteriba

2016

Science and Technology of Advanced Materials

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Surface modification techniques have been developed significantly in the last couple of decades for enhanced tribological performance of artificial hip implants. Surface modification techniques improve biological, chemical and mechanical properties of implant surfaces. Some of the most effective techniques, namely surface texturing, surface coating, and surface grafting, are applied to reduce the friction and wear of artificial implants. This article reviews the status of the developments of surface modification techniques and their effects on commonly used artificial joint implants. This study focused only on artificial hip joint prostheses research of the last 10 years. A total of 27 articles were critically reviewed and categorized according to surface modification technique. The literature reveals that modified surfaces exhibit reduced friction and enhanced wear resistance of the contact surfaces. However, the wear rates are still noticeable in case of surface texturing and surface coating. The associated vortex flow aids to release entrapped wear debris and thus increase the wear particles generation in case of textured surfaces. The earlier delamination of coating materials due to poor adhesion and graphitization transformation has limited the use of coating techniques. Moreover, the produced wear debris has adverse effects on biological fluid. Conversely, the surface grafting technique provides phospholipid like layer that exhibited lower friction and almost zero wear rates even after a longer period of friction and wear test. The findings suggest that further investigations are required to identify the role of surface grafting on film formation and heat resistance ability under physiological hip joint conditions for improved performance and longevity of hip implants.

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Section: Surface Modification Techniques and Their Recent Developmentmentioning

confidence: 99%

Status of surface modification techniques for artificial hip implants

Ghosh

Abanteriba

2016

Science and Technology of Advanced Materials

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“…7 . The peaks at 1235, 1088 and 788 cm −1 are attributed to the stretching vibrations of O–P–O, C–N–C and P–O–C in MPC repeat units, respectively [ 21 ]. The wider absorption peak at 584 cm −1 (as compared with the uncomplexed γ-CD) and the characteristic peak at 1028 cm −1 were visible in the spectra of both PEP100M15CD and PR30CD80P, while the –CH 2 – vibration absorption peak of PEO at 1350 cm −1 disappears in the spectrum of PEP100M15CD.…”

Section: Resultsmentioning

confidence: 99%

Self-assemblies of γ-CDs with pentablock copolymers PMA-PPO-PEO-PPO-PMA and endcapping via atom transfer radical polymerization of 2-methacryloyloxyethyl phosphorylcholine

Lin¹,

Kong²,

Ye³

et al. 2015

Beilstein J. Org. Chem.

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SummaryPentablock copolymers PMA-PPO-PEO-PPO-PMA synthesized via atom transfer radical polymerization (ATRP) were self-assembled with varying amounts of γ-CDs to prepare poly(pseudorotaxanes) (PPRs). When the concentration of γ-CDs was lower, the central PEO segment served as a shell of the micelles and was preferentially bent to pass through the γ-CD cavity to construct double-chain-stranded tight-fit PPRs characterized by a channel-like crystal structure. With an increase in the amount of γ-CDs added, they began to accommodate the poly(methyl acrylate) (PMA) segments dissociated from the core of the micelles. When more γ-CDs were threaded and slipped over the segments, the γ-CDs were randomly distributed along the pentablock copolymer chain to generate single-chain-stranded loose-fit PPRs and showed no characteristic channel-like crystal structure. All the self-assembly processes of the pentablock copolymers resulted in the formation of hydrogels. After endcapping via in situ ATRP of 2-methacryloyloxyethyl phosphorylcholine (MPC), these single-chain-stranded loose-fit PPRs were transformed into conformational identical polyrotaxanes (PRs). The structures of the PPRs and PRs were characterized by means of 1H NMR, GPC, 13C CP/MAS NMR, 2D 1H NOESY NMR, FTIR, WXRD, TGA and DSC analyses.

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“…[11][12][13][14][15][16] Among these methods, photochemical treatment induced by UV irradiation is the most promising approach for its fast reaction rate, low cost of processing, simple equipment, and easy industrialization. [17] What's more, it is an effective way to directly immobilize various biocompatible moieties, such as poly(ethylene glycol), [18,19] poly(N-vinyl pyrrolidone), [20] heparin, [21,22] phospholipid polymer, [23][24][25] chitosan, [26][27][28] glycopolymers, [29] and hyaluronic acid [15] onto the surface of a substrate to obtain a target performance.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of polyurethane via covalent immobilization of sugar-based trisiloxane surfactants

Xin

Yan

et al. 2015

Designed Monomers and Polymers

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Sugar-based trisiloxane surfactants (N-siloxanegluconamides and N-siloxanelactobionamides, denoted as Si(3)NGA and Si(3)NLA) with the amphiphilic structures were successfully prepared. Polyurethane (PU) was grafted with 2-carboxyethyl acrylate (CEA) by the means of UV-induced graft polymerization, and further introduction of the Si(3)NGA and Si (3)NLA by conjugating the amino groups and acid groups. The surface graft polymerization was confirmed by attenuated total reflection Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, respectively. Water contact angle, protein adsorption, and platelet adhesion measurements were used to evaluate the hydrophilicity and hemocompatibility of the films. It was found that the Si(3)NGA-modified substrates obviously suppressed protein adsorption and platelet adhesion, while Si(3)NLA-modified substrates exhibited a higher protein adsorption and a coagulating performance of blood.

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Influence of surface PMPC brushes on tribological and biocompatibility properties of UHMWPE

Cited by 48 publications

References 19 publications

Status of surface modification techniques for artificial hip implants

Status of surface modification techniques for artificial hip implants

Self-assemblies of γ-CDs with pentablock copolymers PMA-PPO-PEO-PPO-PMA and endcapping via atom transfer radical polymerization of 2-methacryloyloxyethyl phosphorylcholine

Surface modification of polyurethane via covalent immobilization of sugar-based trisiloxane surfactants

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