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diamond-like carbon Depositing on the Surface of Polylactide Membrane for Prevention of Adhesion Formation During Tendon Repair

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Nano-Micro Letters 2024年第9期16卷 478-499页

作者： Yao Xiao Zaijin Tao Yufeng Ju Xiaolu Huang Xinshu Zhang Xiaonan Liu Pavel A.Volotovski Chao Huang Hongqi Chen Yaozhong Zhang Shen Liu Department of Orthopaedics Shanghai Jiao Tong University School of Medicine Affiliated Sixth People’s Hospital600 Yishan RdShanghai 200233People’s Republic of China Shanghai Tongji Hospital 389 Xincun RdShanghai 200065People’s Republic of China Key Laboratory for Thin Film and Microfabrication of Ministry of Education Research Institute of Micro/Nano Science and TechnologyShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Orthopedic Trauma Department Belarus Republic Scientific and Practical Center for Traumatology and OrthopedicsKizhevatova str.60/4220024 MinskBelarus Shanghai Haohai Biological Technology Limited Liability Company 1386 Hongqiao RdShanghai 200336People’s Republic of China Department of General Surgery Shanghai Jiao Tong University School of Medicine Affiliated Sixth People’s Hospital600 Yishan RdShanghai 200233People’s Republic of China Shanghai Key Laboratory for High Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Post-traumatic peritendinous adhesion presents a significant challenge in clinical *** study proposes the use of diamond-like carbon(DLC)deposited on polylactic acid(PLA)membranes as a biophysical mechanism for anti-adhesion barrier to encase ruptured tendons in tendon-injured *** results indicate that PLA/DLC composite membrane exhibits more efficient anti-adhesion effect than PLA membrane,with histological score decreasing from 3.12±0.27 to 2.20±0.22 and anti-adhesion effectiveness increasing from 21.61%to 44.72%.Mechanistically,the abundant C=O bond functional groups on the surface of DLC can reduce reactive oxygen species level effectively;thus,the phosphorylation of NF-κB and M1 polarization of macrophages are ***,excessive inflammatory response augmented by M1 macrophage-originated cytokines including interleukin-6(IL-6),interleukin-1β(IL-1β),and tumor necrosis factor-α(TNF-α)is largely *** biocompatibility evaluation,PLA/DLC membrane is slowly absorbed within tissue and displays prolonged barrier effects compared to traditional PLA *** studies show the DLC depositing decelerates the release of degradation product lactic acid and its induction of macrophage M2 polarization by interfering esterase and PLA ester bonds,which further delays the fibrosis *** was found that the PLA/DLC membrane possess an efficient biophysical mechanism for treatment of peritendinous adhesion.

关键词： diamond-like carbon Reactive oxygen species scavenging Foreign body reaction Biodegradation Antioxidant Peritendinous adhesion

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diamond-like carbon films synthesized on bearing steel surface by plasma immersion ion implantation and deposition

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中国有色金属学会会刊:英文版 2004年第z1期14卷 291-295页

作者： LIU Hong-xi TANG Bao-yin WANG Lang-ping WANG Xiao-feng YU Yong-hao SUN Tao HU Li-guo State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001China School of Mechanical and Electrical Engineering Harbin Institute of Technology Harbin 150001 China

diamond-like carbon (DLC) films were synthesized by plasma immersion ion implantation and deposition (PIIID) on 9Cr18 bearing steel surface. Influences of working gas pressure and pulse width of the bias voltage on properties of the thin film were investigated. The chemical compositions of the as-deposited films were characterized by Raman spectroscopy. The micro-hardness, friction and wear behavior, corrosion resistance of the samples were evaluated, respectively. Compared with uncoated substrates, micro-hardness results reveal that the maximum is increased by 88.7%. In addition, the friction coefficient decreases to about 0.1, and the corrosion resistance of treated coupons surface are improved significantly.

关键词： plasma immersion ion implantation and deposition(PIIID) diamond-like carbon friction and wear behavior bearing steel

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Structures of diamond-like carbon Films

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Plasma Science and Technology 2006年第3期8卷 285-291页

作者：刘东平陈宝祥刘艳红 Department of Mathematics and Physics Dalian Nationality University Dalian 116600 China State Key Laboratory for Material Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian 116024 China

The structures of diamond-like carbon （DLC） films, including a-C：H, a-C, ta-C：H and ta-C films have been investigated as a random covalent network with a dense film structure. The results show that sp2 C in a-C：H and a-C films tends to form olefinic and aromatic groups while sp^3 C in ta-C：H and ta-C films tends to form single or multiple sixfold groups. The hydrogen atoms in hydrogenated DLC films contribute to stabilizing the carbon skeletal networks. The film structures are well related to their properties such as optical gaps, density and hardness. The results also indicate that the high density and the extreme hardness of ta-C films are attributed to the forming of large sp^3 C bonded sixfold groups.

关键词： diamond-like carbon structure properties

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Surface Roughness of Various diamond-like carbon Films

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Plasma Science and Technology 2006年第6期8卷 701-707页

作者：刘东平刘艳红陈宝祥 School of Mathematics and Physics Dalian Nationalities UniversityDalian 116600China State Key Laboratory for Material Modification by Laser Ion and Electron BeamsDalian University of TechnologyDalian 116024China

Atomic force microscopy is used to estimate and compare the surface morphology of hydrogenated and hydrogen-free diamond-like carbon （DLC） films. The films were prepared by using DC magnetron sputtering of a graphite target, pulsed cathodic carbon arcs, electron cyclotron resonance （ECR）, plasma source ion implantation and dielectric barrier discharge （DBD）. The difference in the surface structure is presented for each method of deposition. The influences of various discharge parameters on the film surface properties are discussed based upon the experimental results. The coalescence process via the diffusion of adsorbed carbon species is responsible for the formation of hydrogen-free DLC films with rough surfaces. The films with surface roughness at an atomic level can be deposited by energetic ion impacts in a highly ionized carbon plasma. The hydrocarbon species dangling bonds created by atomic hydrogen lead to the uniform growth of at the a-C：H film surfaces of the ECR or DBD plasmas

关键词： atomic force microscopy diamond-like carbon surface roughness

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Properties of polydimethylsiloxane hydrophobic modified duplex microarc oxidation/diamond-like carbon coatings on AZ31B Mg alloy

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Journal of Magnesium and Alloys 2021年第4期9卷 1291-1303页

作者： Xue-Jun Cui Chuang-Ming Ning Guang-An Zhang Lun-Lin Shang Li-Ping Zhong Ying-Jun Zhang School of Materials Science and Engineering Sichuan University of Science and EngineeringZigong 643000China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Key Laboratories of Fine Chemicals and Surfactants in Sichuan Provincial Universities Zigong 643000China

A reliable,high-performance coating procedure was developed using PDMS to modify a duplex MAO/DLC coating on an AZ31B Mg ***,the duplex MAO/DLC coating was fabricated via a combined MAO and unbalanced magnetron sputter ***,a PDMS solution was used to modify the MAO/DLC coating via a conventional dip-coating *** surface characteristics,bond strength,hardness,tribological behaviour,and corrosion resistance of the coated samples were evaluated via SEM,CA,Raman spectroscopy,friction and wear behaviour,polarisation curve,and NSS *** PDMS modification reduced the HIT of MAO/DLC coating from 15.96 to 8.34GPa;this is ascribed to the penetration of PDMS,which has good rheological properties to form a viscoelastic Si-based organic polymer layer on the MAO/DLC ***,the PDMS-modified MAO/DLC coating was denser,hydrophobic,and had higher bond strength compared with MAO-and MAO/DLC-coated ***,the PDMS modification reduced the COF and wear rate of the duplex MAO/DLC *** indicates that the PDMS improved the tribological behaviour owing to the transferred Si oxide that originated from the Si-O network of the PDMS,as well as the low graphitisation of the DLC layer during ***,the corrosion current density of the MAO/DLC-coated sample modified by PDMS for 10min decreased by two order of magnitude compared with that of the MAO/DLC-coated sample but by five orders of magnitude compared with that of the bare *** NSS tests proved that the PDMS layer slowed the corrosion of the Mg alloy under long-term service,enhancing the corrosion protection *** results are attributed to the high bond strength and lubricant MAO/DLC layer,and the dual role of sealing and hydrophobicity of ***,PDMS modification is promising for the fabrication of protective materials for Mg alloys that require corrosion and wear resistance.

关键词： Magnesium alloy Microarc oxidation diamond-like carbon Polydimethylsiloxane Tribological behaviour Corrosion resistance

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Deposition of diamond-like carbon on Inner Surface by Hollow Cathode Discharge

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Plasma Science and Technology 2014年第1期16卷 63-67页

作者：李世超何锋郭琦欧阳吉庭 School of Physics Beijing Institute of Technology

A cylindrical hollow cathode discharge （HCD） in CH4/Ar gas mixture at pressure of 20-30 Pa was used to deposit diamond-like carbon （DLC） films on the inner surface of a stainless steel tube. The characteristics of the HCD including the voltage-current curves, the plasma im- ages and the optical emission spectrum （OES） were measured in Ar and CHn/Ar mixtures. The properties of DLC films prepared under different conditions were analyzed by means of Raman spectroscopy and scanning electron microscopy （SEM）. The results show that the electron exci- tation temperature of HCD plasma is about 2400 K. DLC films can be deposited on the inner surface of tubes. The ratio of sp3/sp2 bonds decreases with the applied voltage and the deposition time. The optimizing CH4 content was found to be around CH4/Ar =1/5 for good quality of DLC films in the present system.

关键词： diamond-like carbon hollow cathode discharge film deposition inner surface

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Deposition of diamond-like carbon Films by High-Intensity Pulsed Ion Beam Ablation at Various Substrate Temperatures

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Chinese Physics Letters 2003年第9期20卷 1619-1621页

作者：梅显秀刘振民马腾才董闯 StateKeyLaboratoryofMaterialsModification DalianUniversityofTechnologyDalian116024

diamond-like carbon (DLC) films have been deposited on to Si substrates at substrate temperatures from 25°C to 400°C by a high-intensity pulsed-ion-beam (HIPIB) ablation deposition technique. The formation of DLC is confirmed by Raman spectroscopy. According to an x-ray photoelectron spectroscopy analysis, the concentration of sp3 carbon in the films is about 40% when the substrate temperature is below 300°C. With increasing substrate temperature from 25°C to 400°C, the concentration of sp3 carbon decreases from 43% to 8%. In other words, sp3 carbon is graphitized into sp2 carbon when the substrate temperature is above 300°C. The results of x-ray diffraction and atomic force microscopy show that, with increasing the substrate temperature, the surface roughness and the friction coefficient increase, and the microhardness and the residual stress of the films decrease.

关键词： Temperature coefficient of friction discotic liquid crystals Films Substrates Ion beams diamond-like carbon

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STRUCTURE, MECHANICAL PROPERTIES AND THERMAL STABILITY OF diamond-like carbon FILMS PREPARED BY ARC ION PLATING

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 331-338页

作者： Y.S.Zou J.D.Zheng J.Gong C.Sun R.F.Huang L.S.Wen DivisionofSurfaceEngineeringofMaterials InstituteofMetalResearchTheChineseAcademyofSciencesShenyang110016China DivisionofSurfaceEngineeringofMaterials InstituteofMetalResearchTheChineseAcademyofSciencesShenyang110016China／／ShenyangResearchCenterforInterfacialMaterialsShenyang110016China

diamond-like carbon (DLC) films have been prepared on Si(100) substrates by arc ion plating in conjunction with pulse bias voltage under H2 atmosphere. The depo sited films have been characterized by scanning electron microscopy and atomic f orce microscopy. The results show that the surface of the film is smooth and den se without any cracks, and the surface roughness is low. The bonding characteris tic of the films has been studied by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. It shows the sp3 bond content of the film deposited at -200V is 26.7%. The hardness and elastic modulus of the film determined by nanoindent ation technique are 30.8 and 250.1GPa, respectively. The tribological characteri stic of the films reveals that they have low friction coefficient and good wear- resistance. After deposition, the films have been annealed in the range of 350-7 00℃ for 1h in vacuum to investigate the thermal stability. Raman spectra indica te that the ID/IG ratio and G peak position have few detectable changes below 50 0℃. Further increasing the annealing temperature, the hydrogen can be released, the structure rearranges, and the phase transition of sp3 configured carbon to sp2 configured carbon appears.

关键词： diamond-like carbon arc ion plating microstructure mechanical

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Fabrication of ZnO nanoparticles-embedded hydrogenated diamond-like carbon films by electrochemical deposition technique

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Chinese Physics B 2013年第5期22卷 568-571页

作者：张培增李瑞山潘效军谢二庆 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University School of Science Lanzhou University of Science and Technology

ZnO nanoparticles-embedded hydrogenated diamond-like carbon （ZnO-DLC） films have been prepared by electro- chemical deposition in ambient conditions. The morphology, composition, and microstructure of the films have been investigated. The results show that the resultant films are hydrogenated diamond-like carbon films embedded with ZnO nanoparticles in wurtzite structure, and the content and size of the ZnO nanoparticles increase with increasing deposition voltage, which are confirmed by X-ray photoelectron spectroscopy （XPS）, Raman, and transmission electron microscope （TEM）. Furthermore, a possible mechanism used to describe the growth process of ZnO-DLC films by electrochemical deposition is also discussed.

关键词： diamond-like carbon ZnO nanoparticles electrochemical deposition microstructure

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Finite element and experimental analysis of Vickers indentation testing on Al_2O_3 with diamond-like carbon coating

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Journal of Central South University 2012年第5期19卷 1175-1181页

作者： ZHAI Jian-guang WANG Yi-qi KIM Tae-gyu SONG Jung-il Department of Mechanical Engineering Changwon National University Changwon 641-773 Korea Department of Nanosystem and Nanoprocess Engineering Pusan National University Pusan 609-735 Korea

Numerical simulation and experimental study of the Vickers indentation testing of the Al2O3 ceramic coated by diamond-like carbon(DLC) layer were *** numerical analysis was implemented by a two-dimensional finite element(FE) axis symmetry *** analysis results gave insight into the fracture mechanism of DLC films coated on brittle ceramic(Al2O3) *** maximum principal stress field was used to locate the most expected area for crack formation and propagation during the Vickers indentation *** results show that the median crack initiates in the interface under indenter,before ring crack occurs as the indenter presses ***,the plastic deformation appears when the indenter penetrates into the *** thicker DLC coating increases the Vickers hardness and fracture toughness.

关键词： Vickers indentation testing finite element diamond-like carbon Al2O3 fracture toughness

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