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Effects of Adsorption of Albumin and Gamma-Globulin on the Tribological Performance of a Diamond-Like Carbon Film

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Journal of Wuhan University of Technology(Materials Science) 2019年第5期34卷 1103-1108页

作者： WU Bingjie leng yongxiang Key Laboratory for Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Quantum Materials Research Center School of Physics and Electronic EngineeringZhengzhou Normal UniversityZhengzhou 450044China

The effects of surface adsorption of bovine serum albumin(BSA) and human gamma-globulin(HGG) on the tribological performance of a DLC film were investigated using a quartz crystal microbalance with dissipation(QCM-D), a ball-on-disk reciprocating tribometer, and a three-electrode electrochemical cell. The results showed that the wear depth in the BSA solution was higher than that in the HGG solution. In the HGG solution, the HGG-adsorbed layer could act as a lubricating layer and protect the DLC film from wear. The wear volume of DLC film in BSA and HGG mixture solution was higher than that in single HGG solution. This may be because the BSA molecules inhibit the formation of HGG adsorbed layer during sliding.

关键词： Diamond like carbon(DLC) Quartz crystal microbalance with dissipation(QCM-D) Adsorbed layer Wear

Structure and composition study of carbon-doped titanium oxide film combined with first principles

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Journal of Advanced Ceramics 2014年第1期3卷 49-55页

作者： Wei MAI Feng WEN Dong XIE yongxiang leng Zhonglin MU Key Lab of Advanced Materials of Tropical Island Resources of Ministry of Education School of Materials and Chemical EngineeringHainan UniversityHaikou 570228P.R.China Key Lab of Advanced Technologies of Materials Ministry of EducationChengdu 610031P.R.China Hainan Medical University Haikou 571199P.R.China

Carbon-doped titanium oxide(C/Ti-O)films were prepared on Si(100)wafer,stainless steel(type 304)and glass by reactive magnetron sputtering(RMS)using CO2 gas as carbon and oxygen source under room temperature(RT).X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)were used to analyze structure and composition of the as-prepared C/Ti-O *** could be observed from XRD that the as-prepared C/Ti-O film contained TiO crystal phase ***2p XPS spectrum of the as-prepared C/Ti-O film showed that the valences of titanium were made up of Ti^(2+),Ti^(3+)and Ti^(4+).C1s XPS spectrum revealed that carbon was doped into titanium oxide based on the existence of the typical Ti-C *** optical absorption curve by ultraviolet-visible(UV-Vis)spectrophotometer showed that the C/Ti-O film appeared the remarkable red shift of absorption edge,which contributed to C substitution in O sites in amorphous TiO_(2).Photocatalysis test using methyl orange(MO)as indicator confirmed that the as-prepared C/Ti-O film had photocatalytic *** with the results of the tests and first-principles calculations,a potential photocatalysis mechanism was proposed.

关键词： C/Ti-O films carbon-doped magnetron sputtering first principles

Carbon-Doped Titanium Oxide Films by DC Reactive Magnetron Sputtering Using CO_2 and O_2 as Reactive Gas

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Acta Metallurgica Sinica(English Letters) 2014年第2期27卷 239-244页

作者： Dong Xie Feng Wen Wenmao Yang Xueyuan Li yongxiang leng Guojiang Wan Hong Sun Nan Huang School of Physical Science and Technology Southwest Jiaotong University Key Laboratory for Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong University Key Laboratory of Tropical Biological Resource of Chinese Educational Ministry School of Materials and Chemical EngineeringHainan University Institute of Mechanical Manufacturing Technology China Academy of Engineering Physics

CO2 and O2 were employed as reactive gases to fabricate carbon-doped titanium oxide films using DC reactive magnetron sputtering. Microstructure, composition and optical band gap of the films were investigated by X-ray diffraction, X-ray photoelectron spectroscopy, and UV-visible spectrophotometer, respectively. The results showed that carbon-doped titanium monoxide films （C-TiO） with a carbon concentration of 5.8 at.% were obtained in an AffCO2 mixed atmosphere. However, carbon-doped futile and anatase （C-TiO2） with a carbon concentration of about 1.4 at.% were obtained in an Ar/CO2/O2 mixed atmosphere. The optical band gaps of C-TiO and C-TiO2 were about 2.6 and 2.9 eV, respectively. Both of them were narrower than that of pure TiO2 films. Films with narrowed optical band gap energy are promising in promoting their photo-catalytic activity.

关键词： Carbon-doped titanium oxide films Optical band gap DC reactive magnetron sputtering

Utilization of Basalt Saw Mud as a Spherical Porous Functional Aggregate for the Preparation of Ordinary Structure Concrete

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Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 364-375页

作者：周永祥关青锋 leng Faguang WANG Jing LI Tianjun Faculty of Architecture Civil and Transportation EngineeringBeijing University of TechnologyBeijing 100124China Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing 100012China School of Materials Science and Engineering Southeast UniversityNanjing 211189China Institute of Building Materials China Academy of Building ResearchBeijing 100013China State Key Laboratory of Building Safety and Built Environment Beijing 100013China Zhejiang Chinavigor E.P.Technology Co. Ltd.Zhejiang 315043China

To promote the production and application of artificial aggregates,save natural sand resources and protect the ecological environment,we evaluated the feasibility of using spherical porous functional aggregates(SPFAs) formed by basalt saw mud under autoclave curing in ordinary structural *** our work,two types of prewetted functional aggregates were taken as replacements for natural aggregates with different volume substitution rates(0%,5%,10%,15%,20%,25%,and 30%) in the preparation of ordinary structural concrete with water-to-binder ratios(W/B) of 0.48 and *** effects of the functional aggregate properties and content,W/B,and curing age on the fluidity,density,mechanical properties and autogenous shrinkage of ordinary concrete were *** experimental results showed that the density of concrete declined at a rate of not more than 5%,and the 28 d compressive strength could reach 31.0-68.2 *** W/B,long curing age and high-quality functional aggregates were conducive to enhancing the mechanical properties of SPFAs *** the rolling effects,SPFAs can optimize the particle gradation of aggregate systems and improve the fluidity of concrete,and the water stored inside SPFAs provides an internal curing effect,which prolongs the cement hydration process and considerably reduces the autogenous shrinkage of *** exhibits high strength and high density,as well as being more cost-effective and ecological,and is expected to be widely employed in ordinary structural concrete.

关键词： lightweight concrete civil concrete building basalt saw mud fly ash internal curing environmentally friendly

Theoretical calculation and experimental study of influence of oxygen vacancy on the electronic structure and hemocompatibility of rutile TiO_2

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Science China(Technological Sciences) 2009年第9期52卷 2742-2748页

作者： LEI YiFeng,leng yongxiang,YANG Ping,WAN GuoJiang & HUANG Nan Key Laboratory of Advanced Materials Technology of Ministry of Education,Department of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China Key Laboratory of Advanced Materials Technology of Ministry of Education Department of Materials Science and Engineering Southwest Jiaotong University Chengdu China

In this work,the relationship between electronic structure and hemocompatibility of oxygen deficient rutile TiO2-x was studied by both theoretical calculation and experimental study. Based on the local density functional theory,first-principals method was performed to calculate the electronic structure of rutile TiO2 with different oxygen vacancy concentration. In the range of less than 10% of (or equal) physically realistic O vacancy concentration,the band gap of rutile TiO2 increases with increasing O vacancy concentration,leading the TiO2 changes from a p-type to an n-type semiconductor. The valance band of TiO2 is predominated by O 2p orbital,while the conduction band is occupied by Ti 3d orbital for different O vacancy concentration. The O vacancy results in the occupation of electrons at the bottom of conduction band of TiO2,and the donor density increases with increasing O vacancy concentration. When materials come in contact with blood,the n-type semiconductor feature of oxygen deficient TiO2-x with the bottom of conduction band occupied by electrons would prevent charge transfer from fibrinogen into the surface of materials,thus inhibiting the aggregation and activation of platelets,therefore improving the hemocompatibility of rutile TiO2-x.

关键词： rutile TiO2 oxygen vacancy electronic structure hemocompatibility

不同种类等离子处理对超高分子量聚乙烯表面能的影响

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高分子材料科学与工程 2011年第2期27卷 71-74页

作者：谢东刘恒君邓兴瑞冷永祥黄楠西南交通大学材料先进技术教育部重点实验室材料科学与工程学院四川成都610031 西南交通大学物理科学与技术学院四川成都610031

以表面能为评价指标,研究不同种类等离子(氢、氧、氩)处理对超高分子量聚乙烯(UHMWPE)的活化作用。研究结果表明,UHMWPE经氧等离子处理后表面能增幅最大,经氩离子处理表面能增幅次之,而经氢离子处理表面能不仅没有增加,反而还有所下降... 详细信息

以表面能为评价指标,研究不同种类等离子(氢、氧、氩)处理对超高分子量聚乙烯(UHMWPE)的活化作用。研究结果表明,UHMWPE经氧等离子处理后表面能增幅最大,经氩离子处理表面能增幅次之,而经氢离子处理表面能不仅没有增加,反而还有所下降。光电子能谱(XPS)和红外光谱(FT-IR)分析表明,氧和氩等离子处理后UHMWPE表面有含氧极性基团的引入;而氢等离子处理后表面不仅没有含氧基团的引入,反而有憎水基团(反式乙烯基)的生成。正是这些极性或憎水基团的引入导致UHMWPE表面能发生变化。

关键词：表面能微波电子回旋共振等离子超高分子量聚乙烯表面改性

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非平衡磁控溅射制备氮化硅薄膜及其性能研究

真空科学与技术学报 2009年第5期29卷 541-545页

作者：景凤娟张琦冷永祥孙鸿杨苹黄楠西南交通大学材料先进技术教育部重点实验室材料科学与工程学院成都610031

采用非平衡磁控溅射技术,通过改变氮气和氩气分压比P(N2)/P(Ar),在钛合金(Ti6Al4V)表面制备出不同结构及性能的氮化硅薄膜。结果显示,制备的氮化硅薄膜为非晶态结构,随着氮气分压的增加,Si-N键的含量增加,其对应的红外吸收峰逐渐变宽,... 详细信息

采用非平衡磁控溅射技术,通过改变氮气和氩气分压比P(N2)/P(Ar),在钛合金(Ti6Al4V)表面制备出不同结构及性能的氮化硅薄膜。结果显示,制备的氮化硅薄膜为非晶态结构,随着氮气分压的增加,Si-N键的含量增加,其对应的红外吸收峰逐渐变宽,并向高波数偏移。氮化硅薄膜的显微硬度、耐磨性随着P(N2)/P(Ar)的增加而先增加,当P(N2)/P(Ar)为0.25时,随着P(N2)/P(Ar)的增加,薄膜硬度及耐磨性稍有降低。氮化硅薄膜具有较好的膜/基结合力,当增大氮气和氩气分压比,薄膜的脆性随之增加。

关键词：氮化硅薄膜非平衡磁控溅射耐磨性结合力

等离子体增强磁控溅射制备Ti(Cr)SiC(O)N涂层的结构和力学性能研究（英文）

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稀有金属材料与工程 2017年第7期46卷 1762-1767页

作者：辛欣张腾飞王愉喻燕冷永祥谢东黄楠西南交通大学材料先进技术教育部重点实验室四川成都610031

采用等离子体增强磁控溅射(PEMS)方法分别在硬质合金和硅片上制备了TiSiCN,TiSiCON,TiCrSiCN,TiCrSiCON,CrSiCN和CrSiCON涂层。采用XRD、SEM、EDS、显微硬度计及销盘式摩擦磨损试验机对含氧涂层和不含氧涂层的微观结构、成分和力学性能... 详细信息

采用等离子体增强磁控溅射(PEMS)方法分别在硬质合金和硅片上制备了TiSiCN,TiSiCON,TiCrSiCN,TiCrSiCON,CrSiCN和CrSiCON涂层。采用XRD、SEM、EDS、显微硬度计及销盘式摩擦磨损试验机对含氧涂层和不含氧涂层的微观结构、成分和力学性能进行了研究。结果表明,TiSiCON,TiCrSiCON和CrSiCON含氧涂层为TiN型(或CrN型)面心立方(fcc)结构,但是TiSiCON,TiCrSiCON和CrSiCON涂层中氧的存在会导致产生疏松结构,与不含氧涂层TiSiCN,TiCrSiCN和CrSiCN相比具有更多的缺陷;氧的加入会导致Ti(Cr)SiCN涂层硬度和弹性的下降;TiCrSiCON和CrSiCON2种含氧涂层相对于不含氧涂层TiCrSiCN和CrSiCN具有更低的摩擦系数和磨损率;然而,TiSiCON相对于TiSiCN却表现出更高的摩擦系数和磨损率。

关键词： Ti(Cr)SiC(O)N 含氧涂层微观结构硬度磨损

NiTi合金(B2,B19’和R相)键合特征与弹性性质的第一性原理研究

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材料导报 2019年第S2期33卷 383-388页

作者：张然谢东冷永祥景凤娟黄楠西南交通大学物理科学与技术学院材料先进技术教育部重点实验室成都610031 西南交通大学材料科学与工程学院成都610031

运用第一性原理方法计算NiTi合金三种相结构(B2、B19’和R相)的电荷密度、态密度、Mulliken布居、弹性常数,在此基础上探究NiTi合金的键合特征、弹性性质及其内在联系。计算结果表明NiTi合金主要成键类型是金属键,其次还包括共价键和离... 详细信息

运用第一性原理方法计算NiTi合金三种相结构(B2、B19’和R相)的电荷密度、态密度、Mulliken布居、弹性常数,在此基础上探究NiTi合金的键合特征、弹性性质及其内在联系。计算结果表明NiTi合金主要成键类型是金属键,其次还包括共价键和离子键。离子键主要由Ti原子向Ni原子转移少量电荷形成,共价键主要由Ni-3d和Ti-3d的轨道杂化形成,此外B19’和R相中Ni-Ni原子间存在电子云重叠也具有共价键特征。弹性性质计算表明三种相结构的NiTi合金均为延性材料,并具有不同程度的弹性各向异性特征。延性强弱顺序依次为B2>R>B19’,弹性各向异性程度的强弱顺序为B19’>B2>R。材料的延脆性和弹性各向异性主要与合金中共价键、金属键的特征和强度有关。金属键具有无方向性特征,金属键越强材料的延性性能会越强;共价键具有方向性特征,共价键越强,同时金属键越弱,则材料的弹性各向异性的程度会越高。本研究揭示了NiTi合金在B2→R→B19’马氏体相变过程中键合特征和弹性性质的变化情况,对NiTi合金器械的设计和应用具有重要的参考意义。

关键词： NiTi合金键合特征弹性性能第一性原理