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In Vitro Evaluation of Cytotoxicity and Oxidative Stress Induced by multiwalled carbon nanotubes in Murine RAW 264.7 Macrophages and Human A549 Lung Cells

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Biomedical and Environmental Sciences 2011年第6期24卷 593-601页

作者： CHEN Bo LIU Ying SONG Wei Ming HAYASHI Yasuhiko DING Xun Cheng LI Wei Hua Key Laboratory of Public Health Safety Ministry of Education School of Public Health Fudan University Shanghai 200032 China Putuo District Center for Disease Control and Prevention Shanghai 200333 China Graduate School of Engineering Nagoya Inst#ute of Technology Nagoya 466-8555 Japan NPFPC Key Laboratory of Contraceptive ＆ Devices Shanghai Institute of Planned Parenthood Research Shanghai 200032 China

Objective To investigate in vitro cytotoxicity and oxidative stress response induced by multiwalled carbon nanotubes （MWCNTs）. Methods Cultured macrophages （murine RAW264.7 cells） and alveolar epithelium cells type II （human A549 lung cells） were exposed to the blank control, DNA salt control, and the MWCNTs suspensions at 2.5, 10, 25, and 100 ug/mL for 24 h. Each treatment was evaluated by cell viability, cytotoxicity and oxidative stress. Results Overall, both cell lines had similar patterns in response to the cytotoxicity and oxidative stress of MWCNTs. DNA salt treatment showed no change compared to the blank control. In both cell lines, significant changes at the doses of 25 and 100 ug/mL treatments were found in cell viabilities, cytotoxicity, and oxidative stress indexes. The reactive oxygen species （ROS） generation was also found to be significantly higher at the dose of 10 ug/mL treatment, whereas no change was seen in most of the indexes. The ROS generation in both cell lines went up in minutes, reached the climax within an hour and faded down after several hours. Conclusion Exposure to MWCNTs resulted in a dose-dependent cytotoxicity in cultured RAW264.7 cells and A549 cells, that was closely correlated to the increased oxidative stress.

关键词： multi-wall carbon nanotubes Cytotoxicity Oxidative stress RAW 264.7 cells A549 cells

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Low‑Cost,Scalable Fabrication of All‑Fabric Piezoresistive Sensors via Binder‑Free,In‑Situ Welding of carbon nanotubes on Bicomponent Nonwovens

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Advanced Fiber Materials 2024年第1期6卷 120-132页

作者： Guangliang Tian Yihan Shi Jixia Deng Wenhua Yu Leihang Yang Yi Lu Yi Zhao Xiangyu Jin Qinfei Ke Chen Huang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of TextilesDonghua UniversityShanghai 201620China Shanghai Frontiers Science Center of Modern Textiles Donghua UniversityShanghai 201620China Department of Respiratory Medicine Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China Henan Key Laboratory of Medical and Protective Products Henan Yadu Industry Co.Ltd.Xinxiang 453000China

Wearable piezoresistive sensors have shown enormous application prospects in flexible electronics and human-machine ***,current piezoresistive sensors suffer from common deficiencies including high fabrication cost,poor comfort and low attachment fastness of conductive substances on substrates,thereby impeding their large-scale production and practical ***,a three-dimensional all-fabric piezoresistive sensor is reported based on coating multi-wall carbon nanotubes(MWCNTs)on bicomponent nonwovens composed of core-sheath *** combination of core-sheath fibers with a heat-induced welding strategy greatly improves the adhesion fastness and stability of MWCNT *** multi-layered all-fabric structure provides as-prepared sensors with high sensitivity(9.43%kPa^(-1)in 0-10 kPa and 0.076%kPa^(-1)in 20-120 kPa),wide pressure-sensing range(0-120 kPa),fast response/relaxation time(100 and 60 ms),good reproducibility and air *** of the sensor is demonstrated through the detection of human activities(such as pulse,cough and joint movements)and the wireless monitoring of forefinger ***,our sensor is fabricated out of cost-effective materials,using scalable approach without using glue or *** method established in this work may provide an efficient strategy for the design and production of high-performance all-fabric piezoresistive sensors.

关键词： Piezoresistive pressure sensors Core-sheath fibers All-fabric multi-wall carbon nanotubes In-situ welding

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Measurement of thermal conductivity,viscosity and density of ionic liquid [EMIM][DEP]-based nanofluids

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Chinese Journal of Chemical Engineering 2016年第3期24卷 331-338页

作者： Hua Xie Zongchang Zhao Jianhua Zhao Hongtao Gao School of Chemical Engineering Dalian University of Technology Institute of Marine Engineering and Thermal Science Dalian Maritime University

This article studied experimentally the effect of multi-wall carbon nanotubes （MWCNTs） on the thermo physical properties of ionic liquid-based nanofluids. The nanofluids were composed of ionic liquid, 1-ethyl-3- methylimidazolium diethylphosphate [EMIM][DEP], or its aqueous solution[EMIM][DEP]（1）＋ H20（2） and MWCNTs without any surfactants. The thermal conductivity, viscosity and density of the nanofluids were mea- sured experimentally. The effects of the mass fraction of MWCNTs, temperature and the mole fraction of water on the thermo physical properties of nanofluids were studied. Results show that the thermal conductivity of nanofluids increases within the range of 1.3%-9.7% compared to their base liquids, and have a well linear depen- dence on temperature. The viscosity and density of the nanofluids exhibit a remarkable increase compared with those of the base liquids. Finally, the correlation of the effective thermal conductivity and viscosity of the nanofluids was made using the models in the literatures.

关键词： Nanofluid multi-wall carbon nanotubes Thermal conductivity Viscosity Density

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Fabrication of poly(2,6-pyridinedicarboxylic acid)/MWNTs modified electrode for simultaneous determination of guanine and adenine in DNA

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Chinese Chemical Letters 2011年第8期22卷 981-984页

作者： Ke Qin Deng Chun Xiang Li Yu Lin Ling Guo Rong Xu Xiao Fang Li Chemistry and Chemical Engineering College Hunan University of Science and Technology Xiangtan 411201 China

The fabrication of poly（2,6-pyridinedicarboxylic acid）/MWNTs modified glass electrode（PPDA/MWNTs/GCE） was proposed and used for individual or simultaneous determination of guanine and *** performances of the PPDA/MWNTs/GCE were characterized with cyclic voltammetry（CV）.The modified electrode exhibited enhanced electrocatalytic behavior and good stability for the detection of guanine and *** pulse voltammetry（DPV） was used to determine the concentration of guanine,*** detection limit（S/N = 3） for guanine and adenine was 0.045μmol/L and 0.05μmol/L,*** electrochemical method for the measurement of guanine and adenine in calf thymus DNA was also developed with this modified electrode and the result was satisfactory.

关键词： multi-wall carbon nanotubes 2 6-Pyridinedicarboxylic acid Guanine Adenine Calf thymus dsDNA

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Solid-state electrochemiluminescence of a novel iridium(Ⅲ) complex

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Chinese Chemical Letters 2008年第12期19卷 1509-1512页

作者： Shu Quan Sun Qi Jun Song He Fang Yuan Yu Qiang Ding School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China

The solid-state ECL behavior of a water-insoluble bis-cyclometalated （pq）2Ir（N-phMA） complex is presented, in which pq is a 2-phenylquinoline anion and N-phMA is N-phenyl methacrylamide, a monoanionic bidentate ligand. The MWNTs/（pq）2Ir（N-phMA） film, MWNTs/Ru（bpy）3^2＋ film and （pq）2Ir（N-phMA） directly modified glassy carbon electrode were fabricated; only the MWNTs/（pq）2Ir（N-phMA） film can produce steady ECL in the presence of tri-n-propylamine as a coreactant.

关键词： Solid-state electrochemiluminescence Iridium(m) complex multi-wall carbon nanotubes

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Strengthening mechanisms in carbon nanotube reinforced bioglass composites

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Frontiers of Chemical Science and Engineering 2012年第2期6卷 126-131页

作者： Jing ZHANG Chengchang JIA Zhizhong JIA Jillian LADEGARD Yanhong GU Junhui NIE Department of Mechanical Engineering Indiana University-Purdue University Indianapolis Indianapolis IN 46202 USA School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Department of Mechanical Engineering University of Alaska Fairbanks Fairbanks AK 99775 USA

carbon nanotube reinforced bioglass composites have been successfully synthesized by two comparative sintering techniques, i.e., spark plasma sintering （SPS） and conventional compaction and sinteirng. The composites show improved mechanical properties, with SPS technique substantially better than conventional compact and sintering approach. Using SPS, compared with the 45S5Bioglass matrix, the maximum flexural strength and fracture toughness increased by 159% and 105%, respectively. Enhanced strength and toughness are attributed to the interfacial bonding and bridging effects between the carbon nanotubes and bioglass powders during crack propagations.

关键词： 45S5Bioglass multi-wall carbon nanotubes biocomposite mechanical properties sintering

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High specific strength MWCNTs/Mg-14Li-1Al composite prepared by electrophoretic deposition, friction stir processing and cold rolling

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Transactions of Nonferrous Metals Society of China 2022年第12期32卷 3914-3925页

作者： Lin XU Jia-hao WANG Rui-zhi WU Chun-bo ZHANG Hua-jie WU Le-gan HOU Jing-huai ZHANG Key Laboratory of Superlight Materials&Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China College of Science Heihe UniversityHeihe 164300China Harbin Welding Institute Limited Company Harbin 150001China

multi-wall carbon nanotubes reinforced Mg-14Li-1Al composite(MWCNTs/Mg-14Li-1Al) was prepared by the processes of electrophoretic deposition, friction stir processing, and cold rolling. The microstructure and mechanical properties of the composite were investigated. The results show that, the microhardness of the composite is up to HV 84.4, which is 91.38% higher than that of the as-cast matrix alloy(HV 44.1). The yield strength and ultimate tensile strength of the composite are 259 and 313 MPa, which are 135.45% and 115.86% higher than those of the as-cast matrix alloy, respectively, and a high specific strength of 221.98 k N·m/kg is obtained. In the composite, the MWCNTs serve as nucleation particles during the friction stir processing and cold rolling, causing dynamic recrystallization and grain refinement. Furthermore, MWCNTs hinder the movement of dislocations and transfer the load from the matrix alloy, thus improving the strength.

关键词： metal matrix composites Mg-Li alloy multi-wall carbon nanotubes electrophoretic deposition friction stir processing rolling strengthening mechanism

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