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Acta Metallurgica Sinica(English Letters) 2024年第9期37卷 1581-1589页

作者： Ruoyu Di Yonghua Sun runhua yao Sen Pei Xiaohong yao Ruiqiang Hang Shanxi Key Laboratory of Biomedical Metal Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan030024China College of Safety and Emergency Management Engineering Taiyuan University of TechnologyTaiyuan030024China

We report a facile solution method to form titanium oxide(TiO_(2))nano-flower structure on the titanium(Ti)substrates for realizing good physical sterilization and *** first prepare TiO_(2) nanotubes(NT)with a diameter of about 80-100 nm and a length of about 5μm on Ti substrates by anodization,which is utilized as ***,we employ immersion treatment in different concentrations of phosphoric acid solution at 75℃ for 5 h to realize the transformation from TiO_(2) NT to TiO_(2) nano-flower *** addition,we studied the effects of phosphoric acid concentration(1 wt%,2.5 wt%,5 wt% and 10 wt%)on the TiO_(2) nano-flower structure,and the antibacterial properties and biocompatibility of the TiO_(2) nano-flower *** results show that TiO_(2) nano-flower structure become larger and thicker with the increase in the phosphoric acid concentration,and the thickness of the coating can reach 6.88μ***,the TiO_(2) nano-flower structure shows good physical sterilization effect,especially for the TiO_(2) nano-flower structure formed in 10 wt%H^(3)PO_(4) solution,the antibacterial rate can reach 95%.In addition,the TiO_(2) nano-flower structure have no toxicity to the osteoblasts and support cell growth.

关键词： Anodization Biocompatibility Physical sterilization TiO_(2)nano-flower

Biodegradable porous Zn-1Mg-3βTCP scaffold for bone defect repair:In vitro and in vivo evaluation

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Journal of Materials Science & Technology 2023年第31期162卷 189-202页

作者： runhua yao Hui Wang Ruifeng Shan Lin Liu Yuyu Zhao Yonghua Sun Xiaohong yao Di Huang Ruiqiang Hang Shanxi Key Laboratory of Biomedical Metal Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Shanxi Xinhua Chemical Defense Equipment Research Institute Co. LtdTaiyuan 030008China Research Center for Nano-Biomaterials&Regenerative Medicine Department of Biomedical EngineeringCollege of Biomedical EngineeringTaiyuan University of TechnologyTaiyuan 030024China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030060China

Zn-based materials are promising as bone repair materials,but their poor mechanical property and bioactivity as well as low degradation rate render the potential *** structural and material design can address the *** this study,porous Zn-1 wt.%Mg-3 vol.%β-TCP scaffolds with 40%and 60%preset porosities were fabricated via heating-press sintering using NaCl particles as space holders,and their mechanical properties,in vitro degradation behavior,cytotoxicity and in vivo osteogenic activities were *** results showed that the actual porosities of the scaffolds were 22%and 50%.Mg exists in the form of Zn 2 Mg and Zn 11 Mg 2,whileβ-TCP evenly distributed in the *** compressive yield strength of scaffolds ranges from approximately 58.46 to 71.04 MPa,which is close to that of cancellous *** in vitro degradation tests showed that the corrosion rate of the scaffolds was in the range of about 2.73-4.28 mm y^(-1).Moreover,the scaffolds not only provided great space for osteoblasts adhesion and proliferation in vitro but also possessed favorable degradability and osteogenic activity in *** porous Zn-1 wt.%Mg-3 vol.%β-TCP scaffolds manifest reliable mechanical properties,desirable degradability,and osteogenic activity,which are promising as next-generation bone repair materials.

关键词： Biodegradation Zn-based composites Porous scaffolds Bone repair

Corrosion behavior,antibacterial ability,and osteogenic activity of Zn-incorporated Ni-Ti-O nanopore layers on NiTi alloy

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Journal of Materials Science & Technology 2022年第2期97卷 69-78页

作者： Yonghua Sun Yuyu Zhao He Zhang Youjie Rong runhua yao Yi Zhang Xiaohong yao Ruiqiang Hang Laboratory of Biomaterial Surfaces&Interfaces Institute of New Carbon MaterialsCollege of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Development of bone fixation devices with excellent corrosion resistance,antibacterial ability,and osteogenic activity is critical for promoting fracture *** this study,Zn-incorporated nanopore(NP)layers were prepared on the NiTi alloy through anodization and hydrothermal *** show that Zn can be evenly incorporated into the NP layers in the form of ZnTiO_(2).The Zn-incorporated samples exhibit good corrosion resistance and significantly reduce Ni^(2+)***,the samples can continuously release Zn^(2+),which is responsible for excellent long-term antibacterial ***,the synergetic effect of Zn^(2+) release and nanoporous structure of the NP layers endues the NiTi alloy excellent osteogenic activity,as verified by upregulated alkaline phosphatase activity,secretion of type I collagen,and extracellular matrix ***,Zn-incorporated Ni-Ti-O NP layers have great potential as biomedical coatings of NiTi-based implant materials.

关键词： Nickel-titanium alloy Anodization Corrosion behavior Antibacterial ability Osteogenic activity

生物可降解Zn-Nb复合材料的制备及性能研究

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太原理工大学学报 2022年第4期53卷 588-599页

作者：韩书扬姚润华杭瑞强姚晓红太原理工大学材料科学与工程学院医用金属材料山西省重点实验室太原030024

以Zn粉和Nb粉为原料,通过真空热压烧结工艺制备了Zn-xNb(x=0,0.5,1,3,5,10)复合材料,对其表面形貌和物相进行表征,并探究了Nb的添加对材料力学性能、腐蚀降解行为以及细胞相容性的影响。结果表明:Nb颗粒呈层片状分布于Zn基体中;随着Nb... 详细信息

以Zn粉和Nb粉为原料,通过真空热压烧结工艺制备了Zn-xNb(x=0,0.5,1,3,5,10)复合材料,对其表面形貌和物相进行表征,并探究了Nb的添加对材料力学性能、腐蚀降解行为以及细胞相容性的影响。结果表明:Nb颗粒呈层片状分布于Zn基体中;随着Nb含量的增加,复合材料的压缩屈服强度先增加后降低,其中Zn-0.5Nb性能最佳;Nb含量的增加促进了复合材料的降解;相比于纯Zn,可能是由于Nb的添加减少了Zn^(2+)的释放,因此Nb含量越高的试样表现出越好的细胞相容性。

关键词：热压烧结生物可降解材料锌-铌复合材料腐蚀降解行为细胞相容性

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医用NiTi合金在激光微连接下的微观组织和力学行为

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热加工工艺 2020年第9期49卷 11-14,10页

作者：郭志宏姚润华胡永金太原理工大学材料科学与工程学院山西太原030024

本文利用脉冲激光对钛镍合金丝进行焊接,得到了成型质量良好的焊接接头,在此基础上对钛镍合金焊接接头的微观组织形貌进行了观察并分析了焊接成型过程。此外对钛镍合金焊接接头进行了硬度分布测试,并通过纳米压痕测试从能量变化的角度... 详细信息

本文利用脉冲激光对钛镍合金丝进行焊接,得到了成型质量良好的焊接接头,在此基础上对钛镍合金焊接接头的微观组织形貌进行了观察并分析了焊接成型过程。此外对钛镍合金焊接接头进行了硬度分布测试,并通过纳米压痕测试从能量变化的角度定量表征了焊接接头各区域的自弹性恢复率。结果表明:焊接过程中熔池在自身重力和润湿作用下沿着丝材接触面流动从而形成接头,焊接接头各区域的晶粒分布状态有明显不同,焊接接头的硬度分布总体呈U型分布,且母材的自弹性恢复率最高,熔化区最低,热影响介于两者之间,这与焊接过程中焊缝组织中生成的金属间化合物阻碍马氏体形变有关。

关键词：钛镍合金激光焊接微观组织自弹性恢复率

云南省德宏傣族景颇族自治州2015年新报告HIV感染者亚型分析

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中华流行病学杂志 2017年第8期38卷 1107-1112页

作者：段星王可然王继宝杨涛王译葵杨锦叶润华杨跃诚姚仕堂段松何纳德宏傣族景颇族自治州疾病预防控制中心性病艾滋病防制科芒市678400 复旦大学公共卫生学院流行病学教研室公共卫生安全教育部重点实验室上海200032

目的分析云南省德宏傣族景颇族自治州（德宏州）2015年1-11月新报告HIV感染者亚型，掌握德宏州中国籍和缅甸籍HIV感染者亚型分布特征。方法对德宏州2015年1-11月新报告的HIV感染者且血浆量在200 μl以上的标本进行核酸抽提，使用RT-PC... 详细信息

目的分析云南省德宏傣族景颇族自治州（德宏州）2015年1-11月新报告HIV感染者亚型，掌握德宏州中国籍和缅甸籍HIV感染者亚型分布特征。方法对德宏州2015年1-11月新报告的HIV感染者且血浆量在200 μl以上的标本进行核酸抽提，使用RT-PCR方法对HIV的gag、env和pol 3个基因进行反转录扩增，所得产物直接测序，确定亚型型别。结果 2015年1-11月德宏州新报告HIV感染者963例，成功测定HIV亚型的感染者499例。独特重组（URFs）比例最大（27.1%，135/499）；其后为C（26.7%，133/499）和CRF01_AE（19.2%，96/499）等亚型。URFs中主要包括4种形式的重组，其中以BC亚型重组最多。中国籍和缅甸籍感染者的亚型分布特征不同，传播方式是唯一与中国籍和缅甸籍感染者亚型分布有关联的因素。结论德宏州中国籍和缅甸籍HIV感染者亚型分布复杂，URFs首次居分布首位。中国籍和缅甸籍感染者亚型分布有差异，但主要受HIV传播方式的影响。

关键词：艾滋病病毒亚型分布中国籍缅甸籍

Doped ceramics of indium oxides for negative permittivity materials in MHz-kHz frequency regions

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Journal of Materials Science & Technology 2021年第2期61卷 125-131页

作者： Guohua Fan Zhongyang Wang Kai Sun yao Liu runhua Fan Key Laboratory fo r Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan 250061China College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai 201306China

Negative permittivity has been widely studied in various metamaterials and percolating composites, of which the anomalous dielectric behavior was attributed to critical structural properties of building ***, mono-phase ceramics of indium tin oxides(ITO) were sintered for epsilon-negative materials in MHz-k Hz frequency regions. Electrical conductivity and complex permittivity were analyzed with DrudeLorentz oscillator model. Carriers’ characters were measured based on Hall effect and the magnitude and frequency dispersion of negative permittivity were mainly determined by carrier ***-dependent dielectric properties further proved the epsilon-negative behaviors were closely associated with free carriers’ collective responses. It’s found that negative permittivity of ITO ceramics was mainly caused by plasma oscillations of free carriers, while the dielectric loss was mainly attributed to conduction loss. Negative permittivity realized here was related to materials intrinsic nature and this work preliminarily determined the mechanism of negative permittivity in doped ceramics from the perspective of carriers.

关键词： Tin-doped indium oxides Negative permittivity n-type carriers Plasma oscillation

云南省德宏傣族景颇族自治州2015年新报告缅甸籍HIV感染者高危行为调查

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中华流行病学杂志 2016年第12期37卷 1596-1601页

作者：李林张玉成杨跃诚曹艳芬唐仁海叶润华杨世江姚仕堂王继宝段松何纳德宏州疾病预防控制中心艾滋病性病防治科芒市678400 复旦大学公共卫生学院流行病学教研室、公共卫生安全教育部重点实验室上海200032

目的了解云南省德宏傣族景颇族自治州（德宏州）缅甸籍HIV感染者相关人口统计学与高危行为特征。方法以德宏州2015年新报告的缅甸籍感染者为研究对象，开展横断面调查，收集其入境德宏地区的目的、住宿地点、停留时间等社会人口统计... 详细信息

目的了解云南省德宏傣族景颇族自治州（德宏州）缅甸籍HIV感染者相关人口统计学与高危行为特征。方法以德宏州2015年新报告的缅甸籍感染者为研究对象，开展横断面调查，收集其入境德宏地区的目的、住宿地点、停留时间等社会人口统计学信息以及艾滋病高危行为发生情况。结果共调查489例缅甸籍感染者，其中男性367例（75.1%）；初中以下文化程度者407例（83.2%）；371例（75.9%）来自与德宏州相邻的克钦邦和掸邦； 339例（69.3%）为务工/经商进入德宏州。23.3%（113/485）的感染者存在无保护性行为，多因素logistic回归分析显示，感染者发生无保护性行为的危险因素包括有配偶/固定性伴（OR=12.98，95%CI：6.53～25.83，P〈0.001），居住在打工场所（OR=2.88，95%CI：1.09～7.61，P=0.033）、出租屋（OR=5.36，95%CI：1.94～14.84，P=0.001）和自己家（OR=5.14，95%CI：1.36～19.35，P=0.016）。32.0%（156/487）的感染者有吸毒行为，多因素logistic回归分析结果显示，感染者发生吸毒行为的危险因素包括男性（OR=15.61，95%CI：6.47～37.69，P〈0.001），文盲（OR=2.89，95%CI：1.44～5.84，P=0.003），来自克钦邦（OR=3.01，95%CI：1.50～6.04，P=0.002）、掸邦（OR=5.30，95%CI：2.66～10.58，P〈0.001），经便道/其他方式入境（OR=1.93，95%CI：1.18～3.14，P=0.009），居住在亲友家（OR=5.78，95%CI：2.01～16.61，P=0.001）、打工场所（OR=6.67，95%CI：3.06～14.53，P〈0.001）、出租屋（OR=11.84，95%CI：4.76～29.47，P〈0.001）、自己家（OR=6.77，95%CI：1.84～24.85，P=0.004）。结论德宏州内缅甸籍HIV感染者流动性大，感染状态知晓比例低而艾滋病相关高危行为发生率较高，给德宏州艾滋病防治工作带来巨大挑战，相关机构需积极探索有效的随访管理办法。

关键词：艾滋病病毒感染者高危行为缅甸籍

Defect-induced insulator-metal transition and negative permittivity in La_(1-x)Ba_(x)CoO_(3)perovskite structure

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Journal of Materials Science & Technology 2022年第17期112卷 77-84页

作者： Zaixin Wei Zhongyang Wang Ciqun Xu Guohua Fan Xiaoting Song yao Liu runhua Fan Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong UniversityJinan 250061China State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Engineering Mathematics University of BristolBristol BS81TWUnited Kingdom College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai 201306China

The development of negative permittivity materials in multifunctional applications requests expansion of their operating frequency and improvement of stability of negative *** electron density is beneficial to reduce plasma frequency so that negative permittivity is achieved in kHz *** permittivity achieved by percolating composites is restricted in practicality due to its instability nature at high *** achieve temperature-stable negative permittivity in kHz region,monophase La_(1-x)Ba_(x)CoO_(3)ceramics were prepared,and the transition from dielectric to metal was elaborated in the perspective of electrical conductivity and negative *** plasma-like negative permittivity is attained in kHz region,which is interpreted by the collective oscillation of low electron *** temperature-stable negative permittivity is based on the fact that the plasmonic state will not be undermined at high *** addition,zero-crossing behavior of real permittivity is observed in La_(0.9)Ba_(0.1)CoO_(3)sample,which provides a promising alternative to designing epsilon-near-zero *** work makes the La_(1-x)Ba_(x)CoO_(3)system a source material for achieving effective negative permittivity.

关键词： La_(1-x)Ba_(x)CoO_(3)ceramics Insulator-metal transition Negative permittivity Electrical conductivity temperature stability

Epsilon-negative BaTiO_(3)/Cu composites with high thermal conductivity and yet low electrical conductivity

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Journal of Materiomics 2020年第1期6卷 145-151页

作者： Zhongyang Wang Kai Sun Peitao Xie yao Liu Qilin Gu runhua Fan John Wang College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai201306China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan250061China Department of Materials Science and Engineering National University of Singapore117574Singapore State Key Laboratory of Bio-fibers and Eco-textiles Institute of Biochemical EngineeringCollege of Materials Science and EngineeringQingdao UniversityQingdao266071China

Epsilon-negative materials with high thermal conductivity and low electrical conductivity are of great importance for high power microwave *** this work,BaTiO_(3)/Cu composites,as a class of epsilonnegative materials,are rationally designed to achieve a high thermal conductivity yet maintaining the electrical insulative *** permittivity behavior induced by dielectric resonance and plasma oscillation is observed in these BaTiO_(3)/Cu composites,which can be explained by the Lorentz and Drude model *** outstanding absorption ability is achieved near the zero-cross point of the *** from the positive temperature coefficient of resistance and the weak temperature dependence of thermal conductivity in BaTiO_(3)/Cu composites,sample containing 22.3 vol% of Cu content exhibits a thermal conductivity of up to 17.7 W/(m·k)and an electrical conductivity down to 0.0022(Ω cm)^(-1) at 150℃.Therefore,BaTiO_(3)/Cu composite is a promising candidate for applications in electromagnetic attenuation and thermal management.

关键词： BaTiO_(3)/Cu composite Negative permittivity Percolation Thermal conductivity Electrical conductivity