The effect of different component ratios in block polymers and processing conditions on electrodeposition efficiency onto titanium

Fukuhara, Yusuke; Kyuzo, Megumi; Tsutsumi, Yusuke; Nagai, Akiko; Chen, Peng; Hanawa, Takao

doi:10.1016/j.apsusc.2015.07.177

Cited by 7 publications

(7 citation statements)

References 27 publications

(35 reference statements)

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“…55) Electrodeposition of PEG is also effective in controlling friction and adhesion between materials. 56) The mechanism of electrodeposition of PEG diamine onto the Ti surface has been precisely elucidated. 57) Electrodeposition is also applicable to other molecules, such as the 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer, which has a structure similar to that of a cell membrane.…”

Section: Osteogenesis and Bone Bondingmentioning

confidence: 99%

Metals and Medicine

Hanawa

2021

Mater. Trans.

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The research and development of metallic biomaterials and their future prospects are overviewed. Approximately 80% of implant devices and 95% of orthopedic devices are still made of metal, and metallic materials therefore continue to play an important role in medical treatment. Current research efforts in metallic biomaterials can be summarized into the following categories: the elucidation of interfacial reactions between metals and tissues (including evaluations of safety and corrosion resistance); the development of new surface treatment techniques (including the control of surface morphology); the development of new alloys; and the development of new manufacturing processes. Interfacial reactions between metals and living tissues are discussed from the viewpoints of biocompatibility and biofunction, corrosion resistance, and calcium phosphate formation on the surface oxide film. The transitions taking place in the surface treatments for osteogenesis, soft tissue adhesion, antibacterial property, and antithrombotic property are summarized, followed by a discussion of their future prospects. In addition, the concept of a dual-functional surface is explained. A review is done of zirconium alloys that decrease magnetic resonance imaging (MRI) artifacts, Ni-free austenitic stainless steel, high-pressure torsion and sliding processing, and additive manufacturing. Finally, the future of biomaterials research is considered.

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Section: Osteogenesis and Bone Bondingmentioning

confidence: 99%

Metals and Medicine

Hanawa

2021

Mater. Trans.

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“…This is a multistep process involving the surface anchoring of initiator groups and subsequent polymerization, prohibiting the large-scale production of coatings. The simpler, scalable approach of adsorbing pMPC copolymers from aqueous solution to generate a brushlike pMPC layer has not generally been undertaken (though pMPC copolymers are sometimes employed in electrodeposited coatings and form the basis for bulk materials with reduced but still significant protein adsorption). , With the appropriate choice of pMPC-containing copolymer architecture to produce relatively dense pMPC tethered layers, fibrinogen and lysozyme adsorption can be avoided within detectible limits of 0.01 mg/m 2 . This lack of fibrinogen adsorption bodes well for the general elimination of serum protein adsorption based on correlations published by Brash .…”

Section: Discussionmentioning

confidence: 99%

“…Here the state of the art is dominated by surface-initiated polymerization (grafting-from) of polyzwitterions such as poly(2-methacryloyloxyethyl phosphorylcholine) (pMPC). ,, The resulting protein-resistant layer can be displaced only if the substrate is compromised; however, the surface polymerization is not currently scalable. The simpler approach of adsorption, or grafting-to, is novel, with a few reports of adsorbed polyzwitterion-containing copolymers reducing but not eliminating protein adhesion. , Between the two strategies of grafting-from and grafting-to lies the innovative approach of a particular surface-initiated polymerization, with polyzwitterion chains grown from a polycationic macroinitiator that has been preadsorbed electrostatically on an oppositely charged surface. This method produced end-tethered pMPC layers of high aqueous lubricity, substantially reducing sliding friction at loads exceeding those in physiological systems …”

Section: Introductionmentioning

confidence: 99%

“…The simpler approach of adsorption, or grafting-to, is novel, with a few reports of adsorbed polyzwitterion-containing copolymers reducing but not eliminating protein adhesion. 37,38 Between the two strategies of grafting-from and grafting-to lies the innovative approach of a particular surface-initiated polymerization, with polyzwitterion chains grown from a polycationic macroinitiator that has been preadsorbed electrostatically on an oppositely charged surface. This method produced endtethered pMPC layers of high aqueous lubricity, substantially reducing sliding friction at loads exceeding those in physiological systems.…”

Section: ■ Introductionmentioning

confidence: 99%

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Adsorbed Polyzwitterion Copolymer Layers Designed for Protein Repellency and Interfacial Retention

et al. 2017

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Poly(2-methacryloyloxyethyl phosphorylcholine) (pMPC), when end-tethered to surfaces by the adsorption of copolymeric cationic segments, forms adsorbed layers that substantially reduce protein adsorption. This study examined variations in the molecular architecture of copolymers containing cationic poly(trimethylammonium ethyl methacrylate (pTMAEMA) anchor blocks that adsorbed strongly to negative surfaces. With appropriate copolymer design, the pTMAEMA blocks were shielded, by pMPC tethers, from solution-phase proteins. The most protein-resistant copolymer layers, eliminating fibrinogen and lysozyme adsorption within detectible limits of 0.01 mg/m, had metrics (the amount of pMPC at the surface and the reduced tether footprint) consistent with the formation of an interfacial polymer brush. The p(TMAEMA-b-MPC) copolymer layers substantially outperformed the protein resistance of surface-polymerized pMPC layers when compared on a per-polyzwitterion-mass basis or on the basis of the scaled tether area. Additionally, p(TMAEMA-b-MPC) copolymer layers offered advantages over the much-studied cationically anchored poly(ethylene glycol) (PEG) graft copolymer system, which forms PEG brushes by the adsorption of a poly l-lysine (PLL) backbone. Although the optimized p(TMAEMA-b-MPC) and PLL-PEG copolymers were similarly fibrinogen-resistant, the cationic protein lysozyme was repelled by pMPC but adhered to the PEG brush via PEG-lysozyme attractions. Additionally, the adsorbed p(TMAEMA-b-MPC) copolymers were not displaced by poly l-lysine homopolymers, which completely displaced the PLL-PEG copolymer to expose a protein-adhesive surface. Thus, the p(TMAEMA-b-MPC) copolymer system comprises a scalable means to produce protein-repellent surfaces, free of the complexities of surface-initiated polymerization and with the advantages of polyzwitterions.

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“…19) In addition, electrodeposition is applied to 2-methacryloyloxyethyl phosphorylcholine (MPC) polymers to inhibit platelet adhesion to the Ti surface. 20,21) As mentioned above, the electrodeposition of a biofunctional molecule is effective in improving the biofunction of metals. However, the mechanism of electrodeposition is still unclear; thus, we made the best effort to elucidate the electrodeposition process and mechanism through the investigation of the change in thickness and mass of the deposited layer, and the transfer of electrons during electrodeposition by quartz crystal microbalance (QCM), ellipsometry, and cyclic voltammetry techniques.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Electrodeposition Process of Poly(Ethylene Glycol) Diamine to Titanium Surface

2020

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Electrodeposition of biofunctional molecules is effective in adding biofunction to metals; however, the mechanism of electrodeposition remains unclear. We consider the electrodeposition process of poly(ethylene glycol) (PEG) to the pure titanium surface, in which the termination of both PEG terminals proceeds with NH 2 (PEG-diamine; MW: 1000). To elucidate this process, the thickness and mass change of the deposited layer and the electron transfer during electrodeposition was investigated using quartz crystal microbalance (QCM), ellipsometry, and cyclic voltammetry. Consequently, surface electric charge directly influenced the adsorption of PEG-diamine and unmodified PEG molecules. PEGdiamine was attracted to QCM electrode containing Ti (Ti-QCM electrode) and condensed on the surface by cathodic charge, by which electron transfer from PEG-diamine to the Ti surface occurred. Bonding of PEG-diamine with the Ti surface by electrodeposition was strong with no detachment from Ti. PEG-diamine was immediately adsorbed onto the Ti surface by the weak electrostatic force and bonded randomly via this force. Subsequent rearrangement and condensation occurred alongside a electrochemical reaction between the molecules and the Ti surface due to cathodic charge. Consequently, PEG-diamine molecules do not firmly remain on the Ti surface under electrodeposition, but shake near the Ti surface while undergoing repeated ionization and un-ionization.

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The effect of different component ratios in block polymers and processing conditions on electrodeposition efficiency onto titanium

Cited by 7 publications

References 27 publications

Metals and Medicine

Metals and Medicine

Adsorbed Polyzwitterion Copolymer Layers Designed for Protein Repellency and Interfacial Retention

Mechanism of Electrodeposition Process of Poly(Ethylene Glycol) Diamine to Titanium Surface

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