Shear Strength of Protein Film Formed by Friction of SiC/SiC Sliding Pair in Plasma Environment. (June 2017)

• Record Type: Journal Article
• Authors: Kanda, Koki; Adachi, Koshi
• Is Part Of: Biotribology. Volume 10(2017)
• Page Start: 26
• Page End: 34
• Publication Date: 2017-06
• Subjects: AFM atomic force microscopy -- FT-IR Fourier transform infrared -- OWLS optical wavelength light-mode spectroscopy -- PBS phosphate buffered saline -- QCM quartz crystal microbalance -- SPM scanning probe microscopy -- UHMWPE ultra-high-molecular-weight polyethylene -- UV ultraviolet; Shear strength -- Protein film -- Protein aggregate -- Surface texture -- Artificial organ; Biological interfaces -- Periodicals; Biomedical materials -- Periodicals; Biomechanics -- Periodicals; Tribology -- Periodicals; 610.2805
• DOI: 10.1016/j.biotri.2017.01.003
• Languages: English
• ISSNs: 2352-5738

Abstract

Abstract: This study aimed to clarify the shear strength of a protein film formed by friction of a SiC/SiC sliding pair in a plasma environment. A ball/disk-type tribometer was utilised to obtain the relationship between the friction force in the plasma and the area of protein aggregates formed on the textured SiC disk sliding against the SiC ball in the plasma. To control the area of protein aggregates adsorbed onto the SiC disk surface, different surface textures and ultraviolet (UV) irradiation for the SiC disk were introduced based on past research. Protein aggregates formed owing to protein denaturation and were adsorbed onto the fabricated surface texture of the SiC disk. A broad protein film formed on the SiC disk surface through conjugation of multiple protein films formed from closely distributed concaves. Therefore, the distribution of fabricated concaves determines the conjugation of the protein film formed from each concave, and the trends of frictional force for each SiC/SiC frictional pair in the plasma depends on the area of protein aggregates. In other words, the area of protein aggregates and the frictional force show an almost linear relationship, regardless of the surface texture on the SiC disk or UV irradiation. Finally, the shear strength of the protein aggregates against the sliding SiC ball in plasma was 7.14 MPa, as determined from the relationship between the area of the protein aggregates and the frictional force in the plasma environment. Highlights: Surface texture and UV irradiation were utilized to control the formation of protein film on SiC disk surface. Relationship between area ratio of protein aggregate and surface texture was clarified. The shear strength of the protein aggregates against the sliding SiC ball in plasma was found to be 7.14 MPa.