Development of Bioactive Organic Polymer Composite by Electrophoretic Deposition

By electrophoretic deposition, wollastonite particles were deposited in pores of porous ultrahigh molecular weight polyethylene (UHMWPE). The UHMWPE-wollastonite composite thus fabricated was soaked in a simulated body fluid. As a result, apatite was formed inside the pores as well as on the surface of the UHMWPE-wollastonite composite. The formed apatite showed high adhesive strength to the composite.

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In Vitro Study Bioactivity of HA/UHMWPE Nanocomposites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.342-343.701 ◽

2007 ◽

Vol 342-343 ◽

pp. 701-704

Author(s):

Li Ming Fang ◽

Yang Leng ◽

Ping Gao

Keyword(s):

Molecular Weight ◽

Calcium Phosphate ◽

Simulated Body Fluid ◽

Body Fluid ◽

In Vitro Study ◽

Ultrahigh Molecular Weight Polyethylene ◽

Octacalcium Phosphate ◽

Tof Sims ◽

Ultrahigh Molecular Weight

Bioactivity of hydroxyapatite reinforced ultrahigh molecular weight polyethylene (HA/UHMWPE) nanocomposites with HA volume content of 10~50 % was evaluated by simulated body fluid (SBF) immersion. The effect of HA content on the capability for calcium phosphate (Ca- P) induction was studied. It was found that Ca-P deposition covered the whole surface of the composite with 30 vol. % of HA after immersion for 1 day and the layer grew to around 10 0m thick in one-week immersion, while there was few nucleus formed for composites with HA content lower than 30 vol. % after one-week immersion. The Ca-P structure was identified as octacalcium phosphate (OCP) by SEM, TEM, and ToF-SIMS.

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Bio-mimetic study of novel materials for joint replacements

MRS Proceedings ◽

10.1557/proc-0898-l05-19 ◽

2005 ◽

Vol 898 ◽

Author(s):

Rahul Ribeiro ◽

Poulomi Ganguly ◽

Donald Darensbourg ◽

Meitin Usta ◽

A. Hikmet Ucisik ◽

...

Keyword(s):

Molecular Weight ◽

Simulated Body Fluid ◽

Boundary Lubrication ◽

Body Fluid ◽

Ultrahigh Molecular Weight Polyethylene ◽

Biocompatible Polymers ◽

Friction Coefficients ◽

Joint Replacements ◽

Hydrophilic Surfaces ◽

Ultrahigh Molecular Weight

AbstractPolytrimethylene carbonate (PTMC) and poly ε-caprolactone are conventional biodegradable, biocompatible polymers. Their friction response against cartilage and surface attraction forces were studied toward using them as artificial cartilage materials. Their behavior was compared to that of natural cartilage and a conventional joint replacement material, ultrahigh molecular weight polyethylene. It was possible to polymerize these materials using a calcium based catalyst. Simulated body fluid (SBF) was used as lubricant between surfaces in the friction tests. It was found that higher surface attractive forces on a silicon tip AFM related to lower friction coefficients. This confirs the fact that hydrophilic surfaces enhance the effectiveness of boundary lubrication of simulated body fluid. PTMC and PTMC-ε-caprolactone co-polymer showed lower hydrophilicity and higher friction coefficients and need to be modified in order to bring them closer in behavior to natural cartilage.

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Development of Bioactive Titanium-Apatite Nuclei Composite

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.361-363.709 ◽

2007 ◽

Vol 361-363 ◽

pp. 709-712 ◽

Cited By ~ 6

Author(s):

Takeshi Yabutsuka ◽

Mitsuhiro Hibino ◽

Takeshi Yao

Keyword(s):

Simulated Body Fluid ◽

Adhesive Strength ◽

Body Fluid ◽

Apatite Layer ◽

Mechanical Interlocking ◽

Composite Surface ◽

High Adhesive Strength

Apatite nuclei were precipitated in the pores of titanium in simulated body fluid (SBF) and titanium-apatite nuclei composite was obtained. Apatite was induced by the apatite nuclei inside the pores of the composite and apatite layer was formed on the composite surface by soaking in SBF. The apatite layer showed high adhesive strength to the composite due to a mechanical interlocking effect between the composite and the apatite.

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Development of Polymer Composite Materials Based on Ultrahigh-Molecular Weight Polyethylene and Carbon Fillers

Materials Science Forum ◽

10.4028/www.scientific.net/msf.945.362 ◽

2019 ◽

Vol 945 ◽

pp. 362-368 ◽

Cited By ~ 1

Author(s):

O.V. Gogoleva ◽

P.N. Petrova ◽

E.S. Kolesova

Keyword(s):

Molecular Weight ◽

Wear Resistance ◽

Composite Materials ◽

Polymer Composite ◽

Carbon Fibers ◽

Ultrahigh Molecular Weight Polyethylene ◽

Polymer Composite Materials ◽

Ultrahigh Molecular Weight ◽

Carbon Fillers ◽

Properties Of Composites

The present study investigates the influence of carbon fibers of LO-1-12N/40 brand and modified carbon fibers of "Belum" brand on performance properties and structure of polymer composite materials based on UHMWPE of Gur-4150 grade. It has been established that introduction of both modified carbon fibers and LO-1-12N/40 carbon fiber in an amount of from 1 to 10 wt.% into the polymer matrix does not lead to significant changes in stress-strain properties of composites compared to the starting polymer. It is shown that the wear resistance of the obtained materials is significantly increased when filling with 5 wt.% carbon fibers of "Belum" brand. The rate of mass wear of polymer composite materials is reduced by 3.3 times; the friction coefficient of PCM is lowered by 3.5 times relative to the starting polymer.

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Исследование методом импедансной спектроскопии полимерного композита с углеродными нанотрубками в контакте с электролитом

Журнал технической физики ◽

10.21883/jtf.2019.09.48066.42-19 ◽

2019 ◽

Vol 89 (9) ◽

pp. 1400

Author(s):

И.А. Маркевич ◽

Н.А. Дрокин ◽

Г.Е. Селютин

Keyword(s):

Molecular Weight ◽

Polymer Composite ◽

Electrical Impedance ◽

Ultrahigh Molecular Weight Polyethylene ◽

Double Electric Layer ◽

Electrical Circuit ◽

Equivalent Electrical Circuit ◽

Frequency Range ◽

Ultrahigh Molecular Weight ◽

Carbon Nano Tubes

The results of measurements of the frequency dependence of the electrical impedance of the composite based on ultrahigh-molecular-weight polyethylene modified with carbon nano-tubes in contact with an electrolyte are presented. The behavior of the active and reactive com-ponents of the impedance, dielectric constant and conductivity in the frequency range from 0.1 Hz to 120 MHz was analyzed. Equivalent electrical circuit that simulate the impedance disper-sion of the polymer composite in contact with an electrolyte were proposed. It was shown that a double electric layer appears at the boundary between the polymer composite and electrolyte lay-er, the electrophysical characteristics of which were determined.

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