Enhancement of tribological properties and characteristic of polymer matrix composite (UHMWPE reinforced with short fibres of polyester) for Total Disc Replacement (TDR)

• Autorzy: Obaid M. N. , Radhi S. H.

Identyfikatory

DOI

10.5604/01.3001.0014.6775

• Języki publikacji: EN

Abstrakty

EN

Purpose: The number of people suffering from Degenerative Disc Disease (DDD) is increasing. The disease causes heavy pain and restrict a number of day-to-day life activities. In extreme cases, the degraded disc is removed under total disc replacement which is usually made up of Ultra-High Molecular Weight Polyethylene (UHMWPE). The material has astounding biocompatible characteristics mechanical properties and wear resistance. However, these characteristics are insufficient in arthroplasty application. Therefore, research investigations are ongoing to improve tribological properties through reinforcement that may result in a composite material of UHMWPE. Thus the current study is aimed at reinforcing UHMWPE with short fibres of polyesters to enhance the tribological properties and surface characteristic so as to improve wear resistance and nourish the fibroblast cells on synthetic disc. Design/methodology/approach: The researcher prepared UHMWPE composite material, reinforced with different weight fractions of short polyester fibres (2, 4, 6, 8 and 10% following hot press method. Further pin-on-disc device was used to study the tribological properties (coefficient of friction and volume of wear). The study tested surface roughness and surface characteristics by atomic force microscopy (AFM) device, hardness by shore D device, contact angle to study the effect of polyester short fibres on wettability of UHMWPE surface and tested the thermal properties and crystalline degree using Differential Scanning Calorimetry measurement (DSC) device. Findings: The results infer that the wear resistance got improved when using 2% w.t polyester though it got decreased initially. However, the value was still more than neat UHMWPE. There was a decrease observed in coefficient of friction, but after 4 w.t% polyester, the coefficient of friction got increased due to increasing percentage of fibres which make it harder and stiff compared to UHMWPE. There was a decline observed in surface roughness due to alignment of the fibres with smooth surface. The contact angle got increased in a moderate range while the roughness enhanced the growth of fibroblast cell. The hardness of composite material got increased, because the fibres turned stiffer and harder than the matrix. DSC results infer the improvements in thermal stability due to high thermal properties of polyester fibres compared to UHMWPE. The degree of crystallinity got increased which in turn enhanced wear resistance, especially at 6 w.t % polyester fibres. There was a mild increase observed in density since the density of polyester is higher than polymer. Research limitations/implications: The major challenge was the dispersion of fibres. Uniform distribution of fibres within the matrix (UHMWPE) was achieved through two steps of mixing processes such as mechanical mixture and twin extruder. In future studies, fatigue tests must be conducted to study the behaviour of prepared composite materials under fatigue cycle. Practical implications: A significant objective is how to connect among different properties to obtain good improvement in tribological and surface properties so as to enhance wear resistance and growth of fibrolase cells. Originality/value: In this study, polymeric short fibres were used as reinforcement with polymeric matrix to enhance the wettability of fibres with matrix. In this way, the bonding among them got increased which supports the tribological, surface, and crystalline behaviour.

Słowa kluczowe

EN

total disc replacement; UHMWPE; polyester fibres; tribological; contact angle; crystalline degree; roughness; melting temperature; volume loss

PL

całkowita wymiana dysku; całkowita endoprotezoplastyka krążka międzykręgowego; UHMWPE; włókna poliestrowe; tribologia; kąt zwilżania; stopień krystaliczności; chropowatość; temperatura topnienia; utrata objętości

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2020
• Tom: Vol. 102, nr 2
• Strony: 55--65
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

Twórcy

autor

Obaid M. N.

• Department of Polymer and Petrochemical Industries, College of Materials Engineering – University of Babylon, Hilla, Iraq

autor

Radhi S. H.

• Department of Materials Engineering, College of Engineering, University of Kufa, Najaf, Iraq

Bibliografia

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• [11] ASTM G99-05, Standard Test Method for Wear Testing with a Pin-on-Disk Apparatus, 2010.
• [12] A.A. Hussein, Fabrication and Characterization of Advanced Blend Polymer Nanocomposites for Human Bone Structural Applications, Ph.D. Thesis, 2017.
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• [17] J.K. Oleiwi, R.A. Anaee, S.H. Radhi, Compression and Hardness with FTIR Characterization of UHMWPE Nanocomposites as Acetabular Cup in Hip Joint Replacement, International Journal of Plastic and Polymer Technology 8/1 (2019) 1-10.
• [18] J.K. Oleiwi, Q.A. Hamad, Studying the Mechanical Properties of Denture Base Materials Fabricated from Polymer Composite Materials, Al-Khwarizmi Engineering Journal 14/3 (2018) 100-111.
• [19] J.K. Oleiwi, R.A. Anaee, S.H. Radhi, Roughness, Wear and Thermal Analysis of UHMWPE Nanocomposites Asacetabular Cup in Hip Joint Replacement, International Journal of Mechanical and Production Engineering Research and Development 8/6 (2018) 855-864.
• [20] A.A. Hussein, O.H. Sabr, Preparation and facilitation of antibacterial activity, hydrophilicity of piezo-pvdf/n-MgO film by electro-spinning and spin coated for wound dressing: a comparative study, Journal of Mechanical Engineering Research & Developments 42/4 (2019) 23-31. DOI: http://doi.org/10.26480/jmerd.04.2019.23.31
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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).