Abstract：
:Oligo(ethylene glycol)-based (OEG) hydrogel samples of varying cross-link densities and degrees of swelling were characterized through dynamic nanoindentation testing. Experiments were performed using a non-standard nanoindentation method, which was validated on a standard polystyrene sample. This method maximizes the capability of the instrument to measure the stiffness and damping of highly compliant, viscoelastic materials. Experiments were performed over the frequency range of 1 to 50 Hz, using a 1mm diameter flat punch indenter. A hydration method was adopted to avoid sample dehydration during testing. Values of storage modulus (E') ranged from 3.5 to 8.9 MPa for the different OEG-hydrogel samples investigated. Samples with higher OEG concentrations showed greater scatter in the modulus measurements and it is attributed to inhomogeneities in these materials. The (E') values did not show a strong variation over frequency for any of the samples. Values of loss modulus (E") were two orders of magnitude lower than the storage modulus, resulting in very low values of loss factor (E"/E'<0.1). These are characteristics of strong gels, which present negligible viscous properties.
journal_name
J Mech Behav Biomed Materauthors
Guglielmi PO,Herbert EG,Tartivel L,Behl M,Lendlein A,Huber N,Lilleodden ETdoi
10.1016/j.jmbbm.2015.02.009subject
Has Abstractpub_date
2015-06-01 00:00:00pages
1-10eissn
1751-6161issn
1878-0180pii
S1751-6161(15)00051-Xjournal_volume
46pub_type
杂志文章abstract：PURPOSE:Although total knee arthroplasty is a well-practiced surgical procedure, material properties and surface topography can contribute to the wear mechanisms and the implant failure. It has been advised that an increased femoral component's surface roughness of total knee prostheses may be a contributing factor to ...
journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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abstract：:Severe plastic deformation (SPD) has recently been advanced as the main process for fabricating bulk ultrafine grained or nanocrystalline metallic materials, which present much higher strength and better bio-compatibility than coarse-grained counterparts. Medical devices, such as aneurysm clips and dental implants, re...
journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
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journal_title：Journal of the mechanical behavior of biomedical materials
pub_type： 杂志文章
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更新日期：2016-06-01 00:00:00
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journal_title：Journal of the mechanical behavior of biomedical materials
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