Biosurface and Biotribology最新文献

{"title":"Synthesis of articular cartilage‐inspired branched polyelectrolyte polymer for enhanced lubrication","authors":"Yixin Wang, L. Wan, Yulong Sun, Hongyu Zhang","doi":"10.1049/bsbt.2020.0004","DOIUrl":"https://doi.org/10.1049/bsbt.2020.0004","url":null,"abstract":"The superlubrication property of articular cartilage is attributed to the hydration lubrication mechanism. This involves the complexation of biomacromolecules with phosphatidylcholine lipids to form a lubricating boundary layer on the surface. Based on this mechanism, a branched polyelectrolyte polymer – PEI-PMPC was synthesised in this study to enhance lubrication via tert-butyl hydroperoxide-initiated grafting polymerisation of 2-methacryloyloxyethyl phosphorylcholine (MPC) onto polyethyleneimine (PEI) with various molecular weights. Following the characterisation of the polymer using nuclear magnetic resonance, a series of tribological tests were performed under different normal loads and different scan rates. The results showed that the PEI-PMPC polyelectrolyte polymer in aqueous solution could effectively reduce the friction coefficient and wear generation between the polyethylene ball and the silica wafer. Additionally, an improvement in the lubrication performance was detected for the PEI-PMPC polyelectrolyte polymer when high molecular weight PEI was used during the reaction, which was attributed to the formation of the hydration shells surrounding the zwitterionic charges of PMPC and the viscosity of the polymer. In conclusion, the PEI-PMPC polyelectrolyte polymer developed herein was characterised by enhanced lubrication, and may be potentially used for biomedical applications such as intra-articular injection to restore joint lubrication.","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42443746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-interface behaviour of graphene and semiconducting SWCNT:C60 blend based nano photodiode for subretinal implant","authors":"Moorthy Vijai Meyyappan,&nbsp;Varadarajan Parthasarathy,&nbsp;Rathnasami Joseph Daniel","doi":"10.1049/bsbt.2019.0045","DOIUrl":"10.1049/bsbt.2019.0045","url":null,"abstract":"<div>\u0000 <p>Hybrid interfaces between living cells and organic conjugated polymers play a pivotal role in bioelectronics medicine. Currently, conjugated polymers are widely utilised for optical stimulation of living cells and other bio-interface applications such as neural probes, cellular scaffolds and biosensors for drug release. In such a work, the authors fabricated and characterised the Nano Photodiode array device for the subretinal implant. However, the authors did not discuss in their report about the biocompatibility of this new device. In this work, the authors manifest that the quintessential graphene electrode and polymer blend of semiconducting single-wall carbon nanotube and C₆₀ fullerene (S-SWCNT:C₆₀) sustains its optoelectronic properties all through the various strides for neural preparation. Further, the studies show that these materials can provide a favourable environment for cell proliferation and a high degree of biocompatibility. PC-12 cells used as a valuable model to validate the biocompatibility were grown successfully onto the S-SWCNT:C₆₀ active layer still preserving its optical and electrical properties. The improved electrical performance of nano photodiode made of graphene, S-SWCNT:C₆₀ established in the previous studies and the excellent bio-interface performance of this nano photodiode shows that the nano photodiode array proposed by the authors is a strong candidate for subretinal implants.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 2","pages":"53-58"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1049/bsbt.2019.0045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43898604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diet reduces the effect of exogenous grit on tooth microwear","authors":"Licheng Hua,&nbsp;Jianbin Chen,&nbsp;Peter S. Ungar","doi":"10.1049/bsbt.2019.0041","DOIUrl":"10.1049/bsbt.2019.0041","url":null,"abstract":"<div>\u0000 <p>Exogenous grit adherent to the surface of food items and food fracture properties have each been considered important factors contributing to pattern and degree of tooth wear in mammals. However, the interactions between these two factors in generating distinctive microwear textures have remained understudied. Here the authors revisit in-vitro results from simulated chewing to explore how adherent grit and physical properties of foods act together to create dental microwear textures on occlusal enamel surfaces. Results suggest that the effect of exogenous grit on microwear texture is dependent on the material properties foods to which they adhere. Grit in the absence of food causes more complex microwear surface textures than foods covered with similar levels and types of grit (for a given number of chews and angle of approach between opposing teeth). Different foods covered in grit also yield different complexity values. Grit-laden, pliant meat, for example, results in a less complex texture than does resistant, grit-laden raw carrot. This work implied that tooth wear assessment can benefit from considering grit load and food material properties together.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 2","pages":"48-52"},"PeriodicalIF":0.0,"publicationDate":"2020-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1049/bsbt.2019.0041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46202782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of sebum properties on skin friction: investigation using a bench test","authors":"Kerlen T. Korbeld,&nbsp;Michel Klaassen,&nbsp;Rikeen D. Jobanputra,&nbsp;Erik G. de Vries,&nbsp;Marc A. Masen","doi":"10.1049/bsbt.2019.0015","DOIUrl":"10.1049/bsbt.2019.0015","url":null,"abstract":"<div>\u0000 <p>The hydro lipid film is an emulsion of sweat and sebum that covers the surface of the human skin and affects the tribological properties of the human skin. This study investigates the effects of the composition of the sebum on the average coefficient of friction. A range of simplified sebums was developed and the friction behaviour was investigated. Five realistic sebums showed a strong variation in friction results, indicating that interpersonal differences in frictional behaviour might have their origin in differences in sebum composition. A more detailed investigation employing controlled variations of individual ingredients showed that friction is highly sensitive to the amount of squalene in the sebum. The amount of fatty acids in the sebum also showed some effects, whilst the amount of cholesterol does not appear to be relevant for the friction behaviour. The main new outcome from this study is that the composition of sebum has a significant effect on the friction response of skin in ways that are currently not yet fully understood.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 2","pages":"43-47"},"PeriodicalIF":0.0,"publicationDate":"2020-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/bsbt.2019.0015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48628636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design method for a bionic wrist based on tensegrity structures","authors":"Jianwei Sun,&nbsp;Xuemin Cao,&nbsp;Guangsheng Song","doi":"10.1049/bsbt.2019.0022","DOIUrl":"10.1049/bsbt.2019.0022","url":null,"abstract":"<div>\u0000 <p>The traditional bionic upper limb structure design is limited by the motion pair and cannot guarantee the flexibility of the mechanical structure. The tensegrity structure has the characteristics of high deformability, strong self-adaptability, and resistance to multi-directional impact. According to the biological characteristics of the upper limbs of the human body, an anatomical study is performed on the upper limb wrist joints that achieve adduction/abduction, flexion/extension, to obtain the relationship between the movements of the related bones and muscles, and to simplify the shape and structure of the wrist. Equivalent mapping of a mechanical model based on two-bar tensile properties. Through the contraction and stretching of the spring, the movement characteristics of the human muscles are realised, and the optimised bionic upper limb wrist tensioning robot without motion pair is further obtained. Adams simulation is used to verify that the bionic tensile wrist can simulate the change movement of the human wrist. The experimental platform was built and a physical prototype was made and the prototype was tested. The results show that the bionic tensile wrist can realise the adaptive motion characteristics of the human wrist well and stably, which proves the validity and feasibility of this design method.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 2","pages":"31-36"},"PeriodicalIF":0.0,"publicationDate":"2020-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/bsbt.2019.0022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49275561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CMM-based method for assessing the volume change of retrieved polyethylene cups in MoP total hip replacements","authors":"Xijin Hua,&nbsp;Junyan Li","doi":"10.1049/bsbt.2019.0011","DOIUrl":"10.1049/bsbt.2019.0011","url":null,"abstract":"<div>\u0000 <p>Wear occurring at the bearing surface and the consequent generation of wear debris has been identified as the primary cause of aseptic loosening in metal-on-polyethylene (MoP) hip joint replacements. The accurate estimation of volume change in polyethylene cups due to creep and wear is, therefore, an important step for identifying the cause of failure and improving the longevity of MoP prosthesis. The purposes of this study were to present and apply a co-ordinate measuring machine (CMM)-based method for assessing the volume change of retrieved components due to wear and creep by using a combination of CMM data and a bespoke computer programme. The method was firstly validated against the standard gravimetric technique, and then applied to four retrieved polyethylene cups for wear assessment and analysis. The results show that the volume changes calculated using the present method match well with those assessed through the gravimetric technique. The CMM-based method presented in the study is capable of effectively and reliably determining the volume change and characterising the wear patch of retrieved components from MoP hip joint replacements.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 2","pages":"37-42"},"PeriodicalIF":0.0,"publicationDate":"2020-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/bsbt.2019.0011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44168103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Finite‐element modelling of frictional behaviour between oesophagus and endoscope","authors":"Chengxiong Lin, Pan Ren, Wei Li, Hengyi Deng, Zhongrong Zhou","doi":"10.1049/bsbt.2019.0034","DOIUrl":"https://doi.org/10.1049/bsbt.2019.0034","url":null,"abstract":"","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 1","pages":"75-81"},"PeriodicalIF":0.0,"publicationDate":"2020-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42926570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In Memoriam: Duncan Dowson (1928–2020)","authors":"Zhongmin Jin,&nbsp;Zhongrong Zhou","doi":"10.1049/bsbt.2020.0006","DOIUrl":"https://doi.org/10.1049/bsbt.2020.0006","url":null,"abstract":"&lt;p&gt;It is with great regret that we have to inform the readers of our Journal that Professor Duncan Dowson, the Honorary Editor of our Journal, has passed away at age 91 (6 January 2020). He had not been feeling well in the last few years and his condition was worsened after a fall. He died in hospital on 6th January 2020. This is a great loss to all of us, particularly in the biotribology community and we will remember him as one of the greatest biotribologists of our time.&lt;/p&gt;&lt;p&gt;Professor Duncan Dowson was born on 31st August 1928 in Yorkshire, UK. He studied an undergraduate degree in Mechanical Engineering at the University of Leeds from 1947 to 1950. He continued his postgraduate study at the same institution and obtained a PhD for his thesis on ‘Cavitation in Lubricating Films Supporting Small Loads’ in 1952. He became a Lecturer in Mechanical Engineering in 1954, a Senior Lecturer in 1963, a Reader in 1965 and a Professor of Engineering Fluid Mechanics and Tribology in 1966: the world's first holder of a Chair of Tribology. He remained active in research as an Emeritus Professor at the University of Leeds after his retirement on 30th September 1993.&lt;/p&gt;&lt;p&gt;Professor Dowson has made a remarkably distinguished contribution to the scientific study and engineering application in the area of Tribology. One of his particular contributions in this field is in Biotribology, a subject that he introduced in 1970 to cover aspects of tribology concerned with biological systems [&lt;span&gt;[1]&lt;/span&gt;]. He was particularly supportive of the research developments in this field. He kindly wrote the Foreword for the ‘Dental Biotribology’ authored by the Editor in 2013 [&lt;span&gt;[2]&lt;/span&gt;].&lt;/p&gt;&lt;p&gt;According to our own accounts, of a total of 616 of his scientific publications, approximately half (301) were dedicated to the area of Biotribology. He published his first paper in Biotribology [&lt;span&gt;[4]&lt;/span&gt;] and organised the first Symposium (Institution of Mechanical Engineers, UK) [&lt;span&gt;[5]&lt;/span&gt;] on the topic of human synovial joints and artificial replacements in 1966, a study that has inspired so many researchers (including two Associated Editors of our Journal) and remained actively investigated till the present time. From the very beginning, he recognised the importance of clinical and medical inputs into this area and had established close collaborations with clinicians including the late Professor Verna Wright, the late Sir John Charnley, Professor Mike Wroblewski etc. Together with many of his postgraduate students and colleagues, he investigated a number of interesting clinical problems, such as joint stiffness, walking activities, and also a cracking joint that has received significant attention recently [&lt;span&gt;[6]&lt;/span&gt;]. His publications on both biomechanics and biotribology of synovial joints and replacements included the hip, the knee, the elbow, the shoulder, the ankle and the finger as well as other interesting topics such as heart values, the fat","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/bsbt.2020.0006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91829354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Systematic review of computational modelling for biomechanics analysis of total knee replacement","authors":"Liming Shu,&nbsp;Shihao Li,&nbsp;Naohiko Sugita","doi":"10.1049/bsbt.2019.0012","DOIUrl":"10.1049/bsbt.2019.0012","url":null,"abstract":"<div>\u0000 <p>In vitro and in vivo testing can provide insight into knee joint mechanics and implant performance. However, these methods are costly and time-consuming, which always limits their widespread use during the design stage of the implant. This review presents a critical analysis of computational modelling (in-silicon) techniques including (i) development of a generic model of total knee replacement (TKR) and application of material properties, loading, and boundary conditions; (ii) design and execution of computational experiments; and (iii) practical applications and significant findings. The results show that the generic model and techniques provide significant insight into the general performance of TKR but have limited explicit validation. The introduction of design-of-experiments, probabilistic, and neural network methodologies in computational modelling has enabled simulation at the population level. Further advances in subjective modelling appear to be limited, mainly because of the lack of subjective materials and boundary conditions. Computational modelling will increasingly be used in the preclinical testing and design of TKR. This modelling should include subjective, multi-scale, and closely corroborated analyses to account for the variability of TKR.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 1","pages":"3-11"},"PeriodicalIF":0.0,"publicationDate":"2020-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1049/bsbt.2019.0012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42105357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced flow sensing with interfacial microstructures","authors":"Yonggang Jiang,&nbsp;Peng Zhao,&nbsp;Zhiqiang Ma,&nbsp;Dawei Shen,&nbsp;Gongchao Liu,&nbsp;Deyuan Zhang","doi":"10.1049/bsbt.2019.0043","DOIUrl":"10.1049/bsbt.2019.0043","url":null,"abstract":"<div>\u0000 <p>Biological flow receptors show astonishing performance and are used as models for the design of novel flow sensors. However, the functional importance of interfacial microstructures is seldom discussed in previous review papers. Herein, this review summarises the underlying biomechanical principles in the biological flow receptors and describes the recent progress in bio-inspired flow sensors, in which the underlying sensing-enhancement mechanisms are emphasised.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 1","pages":"12-19"},"PeriodicalIF":0.0,"publicationDate":"2020-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1049/bsbt.2019.0043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48948263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}