检索结果-南通市图书馆

How the fluorographene replaced graphene as nanoadditive for improving tribological performances of GTL-8 based lubricant oil

引用

Friction 2021年第3期9卷 488-501页

作者： Xiaojing CI wenjie zhao Jun LUO Yangmin WU Tianhao GE Qunji XUE Xiulei GAO Zhiwen FANG Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China School of Materials and Engineering Shanghai UniversityShanghai 200000China Engineering Technology Research Center of Fluorocarbon Materials Shandong Zhongshan Photoelectric Materials Co.Ltd.Zibo 255138China

Fluorographene,a new alternative to graphene,it not only inherits the 2-dimensional(2D)layered structure and outstanding mechanical properties,but also possesses controllable C-F *** is meaningful to reveal the evolution processes of the tribological behaviors from graphene to *** this work,fluorinated reduced graphene oxide nanosheets(F-rGO)with different degree of fluorination were prepared using direct gas-fluorination and they were added into gas to liquid-8(GTL-8)base oil as lubricant additive to improve the tribological *** to the results,the coefficient of friction(COF)reduced by 21%,notably,the wear rate reduced by 87%with the addition of highly fluorinated reduced graphene oxide(HF-rGO)compared with *** was confirmed that more covalent C-F bonds which improved the chemical stability of HF-rGO resisted the detachment of fluorine so the HF-rGO nanosheets showed less damage,as demonstrated via X-ray photoelectron spectroscopy(XPS),Raman spectra,and transmission electron microscopy(TEM).Meanwhile,the ionic liquid(IL)adsorbed on HF-rGO successfully improved the dispersibility of F-rGO in GTL-8 base *** investigation of tribofilm by TEM and focused ion beam(FIB)illustrated that IL displayed a synergy to participate in the tribochemical reaction and increased the thickness of tribofilm during the friction process.

关键词： reduced graphene oxide fluorographene lubricating oil friction wear tribofilm

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Si nanowire Bio-FET for electrical and label-free detection of cancer cell-derived exosomes

引用

Microsystems & Nanoengineering 2022年第3期8卷 141-152页

作者： wenjie zhao Jiawei Hu Jinlong Liu Xin Li Sheng Sun Xiaofeng Luan Yang zhao Shuhua Wei Mingxiao Li Qingzhu Zhang Chengjun Huang Institute of Micoelectronics Chinese Academy of SciencesBeijing 100029People's Republic of China School of Future Technology University of Chingse Academy of SciencesBeijing 100049People's Republic of China School of Information Science and Technology North China University of TechnologyBeijing 100144People's Republic of China

Exosomes are highly important in clinical diagnosis due to their high homology with their parental ***,conventional exosome detection methods still face the challenges of expensive equipment,low sensitivity,and complex *** effect transistors(FETs)are not only the most essential electronic component in the modern microelectronics industry but also show great potential for biomolecule detection owing to the advantages of rapid response,high sensitivity,and label-free *** this study,we proposed a Si nanowire field-effect transistor(Si-NW Bio-FET)device chemically modified with specific antibodies for the electrical and label-free detection of *** Si-NW FETs were fabricated by standard microelectronic processes with 45 nm width nanowires and packaged in a polydimethylsiloxane(PDMS)microfluidic *** nanowires were further modified with the specific CD63 antibody to form a Si-NW *** use of the developed Si-NW Bio-FET for the electrical and labelfree detection of exosomes was successfully demonstrated with a limit of detection(LOD)of 2159 particles/*** contrast to other technologies,in this study,Si-NW Bio-FET provides a unique strategy for directly quantifying and realtime detecting exosomes without labeling,indicating its potential as a tool for the early diagnosis of cancer.

关键词： diagnosis electrical free

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Metal-free Polyimide Photocatalyst for the Oxidation of Amines to Imines

引用

China Petroleum Processing & Petrochemical Technology 2023年第3期25卷 92-103页

作者： Zhou Yafen Cheng Hong Song Yu Wang Qing zhao wenjie Chen Qilin Zhou Limei Xu Bin Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science&EngineeringZigong 643000China

Polyimide(PI) is an organic polymer material with good stability and diverse sources that has attracted widespread attention in the field of photocatalysis. In this study, a series of PI photocatalysts were synthesized by a thermal polymerization approach using pyromellitic dianhydride(PMDA) and various diamine monomers(melamine(MA), 4,4′-oxydianiline, and melem) as the precursors as well as different heating rates. The effects of the diamine precursor and heating rate on the structure, composition, morphology, and optical properties of the as-prepared PI materials were systematically investigated by various characterization techniques. The selective photo-oxidation of benzylamine was used as a model reaction to evaluate the photocatalytic activities of the resulting PI samples for the oxidation of amines to imines. The results revealed that the PI sample prepared using MA and PMDA as the precursors and a heating rate of 7 ℃/min(MA-PI-7) exhibited the best catalytic performance, with 98% benzylamine conversion and 98% selectivity for N-benzylidene benzylamine after 4 h of irradiation. Several benzylamine derivatives and heterocyclic amines also underwent the photo-oxidation reaction over the MA-PI-7 catalyst to afford the corresponding imines with good activity. In addition, MA-PI-7 exhibited good stability over four successive photocatalytic cycles.

关键词： polyimide photocatalyst oxidation amine imine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

One-pot Synthesis of MoO_(3)/PI Composite with Enhanced Photocatalytic Performance for Oxidative Coupling of Amines to Imines

引用

China Petroleum Processing & Petrochemical Technology 2024年第2期26卷 57-71页

作者： zhao wenjie Du Chengxin Song Yu Zhou Yafen Wang Qing Zhou Limei Xu Bin Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchongChina Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science&EngineeringZigongChina

Organic-inorganic MoO_(3)/PI(MoPI)composites were prepared using a simple one-pot thermal copolymerization *** resulting composites exhibited enhanced photocatalytic activity for the selective oxidation of benzylamine to N-benzylidene benzylamine(N-BDBA)in ambient air under simulated solar light irradiation compared to pristine MoO_(3) or polyimide(PI).In particular,the MoPI composite with a 0.3:1 molar ratio of Mo to melamine,referred to as MoPI-0.3,demonstrated the best performance in the photo-oxidation of benzylamine,achieving a benzylamine conversion of 95%with a N-BDBA selectivity exceeding 99%after 3 h *** enhanced photocatalytic activity of the MoPI-0.3 catalyst was attributed to the formation of a direct Z-scheme heterojunction between MoO_(3) and PI,facilitating more efficient separation of the photoinduced electrons and ***,the MoPI-0.3 composite maintained considerably high activity over four consecutive cycles,highlighting its good stability and ***,the MoPI-0.3 composite could photo-oxidize benzylamine derivatives and heterocyclic amines to their corresponding imines,demonstrating the universal applicability of this composite catalyst.

关键词： MoO3/PI composite photocatalysis amine oxidation imine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

3D spiral channels combined with flexible micro-sieve for high-throughput rare tumor cell enrichment and assay from clinical pleural effusion samples

引用

Bio-Design and Manufacturing 2022年第2期5卷 358-370页

作者： Jie Cheng Lina Zhang Yiran Zhang Yifei Ye wenjie zhao Lingqian Zhang Yuang Li Yang Liu Wenchang Zhang Hongyan Guo Mingxiao Li Yang zhao Chengjun Huang Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Department of Cellular and Molecular Biology Beijing Chest HospitalCapital Medical UniversityBeijing Tuberculosis and Thoracic Tumor Research InstituteBeijing 101149China National Engineering Research Center for Beijing Biochip Technology Beijing 102206China

The sieving and enrichment of rare tumor cells from large-volume pleural effusion(PE)samples is a promising technique for cell-based lung tumor diagnosis and drug tests,which features high throughput and recovery,purification,as well as viability rates of rare target cells as the prerequisites for high sensitivity,specificity,and accuracy of tumor cell *** this paper,we propose a three-dimensional(3 D)sieving method for rare tumor cell enrichment,which effectively eliminates the"dead zones"in traditional two-dimensional(2 D)cell filters with a dimension-raising strategy to satisfy the requirements mentioned *** prototype device was combined with a funnel-shaped holder,a flexible micropore membrane in the middle,and a3 D spiral fluid channel covered on the membrane as a three-layer ice-creaming cone composite *** by gravity alone,the device performed as follows:(1)20-fold throughput compared with the 2 D commercial planee hich was up to 20 mL/min for a threefold dilution of whole blood sample;(2)high recovery rates of 84.5%±21%,86%±25%,83%±14%for 100,1000,and 10000 cells/mL,respectively,in 30 mL phosphate buffer saline(PBS)sample,and a 100%positive detection rate in the case of≤5 A549 cells in 1 mL PBS;(3)a typical purification rate of 85.5%±9.1%;and(4)a viability rate of>93%.In the demonstration application,this device effectively enriched rare target cells from large volumes(>25 mL)of clinical pleural *** following results indicated that tumor cells were easy-to-discover in the enriched PE samples,and the proliferation capability of purified cells was(>4.6 times)significantly stronger than that of unprocessed cells in the subsequent 6-day *** above evaluation indicates that the proposed easily reproducible method for the effective execution of rare cell enrichments and assays is expected to become a practical technique for clinical cell-based tumor diagnosis.

关键词： Cell enrichment High throughput Pleural effusion Liquid biopsy 3D printing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Beneficial effects of deep cryogenic treatment on mechanical properties of additively manufactured high entropy alloy:cyclic vs single cryogenic cooling

引用

Journal of Materials Science & Technology 2022年第20期115卷 40-51页

作者： Hongge Li wenjie zhao Tian Chen Yongjiang Huang Jianfei Sun Ping Zhu Yunzhuo Lu Alfonso H.W.Ngan Daqing Wei Qing Du Yongchun Zou School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028China Department of Mechanical Engineering The University of Hong KongHong KongChina Center of Analysis Measurement and Computing Harbin Institute of TechnologyHarbin 150001China

Additively manufactured(AM)metallic materials commonly possess substantial tensile surface residual stress,which is detrimental to the load-bearing service ***,we demonstrated that deep cryogenic treatment(DCT)is an effective method for improving the tensile properties of CoCrFeMnNi high-entropy alloy(HEA)samples fabricated by laser melting deposition(LMD),by introducing high compressive residual stress and deformation microstructures without destroying the AM ***,carrying out the DCT in a single-step mode does not improve the residual stress gradients inherent from the LMD process,which are undesirable as the mechanical properties will not be homogeneous within the *** this work,we show that carrying out the DCT in a cyclic mode with repeated cryogenic cooling and reheating can significantly homogenize the residual stress in LMD-fabricated Co Cr Fe Mn Ni HEA,and improve tensile strength and ductility,compared with single-step DCT of the same cryogenic soaking *** cyclic DCT,the thermal stress is re-elevated to a high value at each cryogenic cooling step,leading to the formation of denser and more intersecting reinforcing crystalline defects and hcp phase transformation,compared to single-step DCT of the same total cryogenic soaking duration in which the thermal stress relaxes towards a low value over *** enhancement of defect formation in the cyclic mode of DCT also leads to more uniform residual stress distribution in the sample after the *** results here provide important insights on optimizing DCT processes for post-fabrication improvement of mechanical properties of AM metallic net shapes.

关键词： Additive manufacturing High entropy alloy Deep cryogenic treatment Residual stress Mechanical properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Tuning F-doped degree of rGO:Restraining corrosion-promotion activity of EP/rGO nanocomposite coating

引用

Journal of Materials Science & Technology 2020年第9期44卷 121-132页

作者： Lu Shen Yong Li wenjie zhao Kui Wang Xiaojing Ci Yangmin Wu Gang Liu Chao Liu Zhiwen Fang Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of ScienceNingbo315201China Public Technology Service Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of ScienceNingbo315201China Engineering Technology Research Center of Fluorocarbon Materials Shandong Zhongshan Photoelectric Materials Co.Ltd.Zibo255138China

Given that graphene features high electrical conductivity,it is a kind of material with corrosion-promotion *** study aimed to inhibit the corrosion-promotion activity of graphene in ***,we report an exciting application of epoxy matrix(EP)/F-doped reduced graphene oxide(rGO)coatings for the long-term corrosion protection of *** synthesized F-doped rGO(FG)did not reduce the utilization of rGO by a wide margin and possessed distinctive electrically insulating *** electrical conductivity of rGO was approximately 1500 S/m,whereas those of FG-1,FG-2 and FG-3 were 1.17,5.217×10^−2 and 3.643×10^-11 S/m,*** and rGO were then dispersed into epoxy *** chemical structures of rGO and FG were investigated by transmission electron microscopy(TEM),scanning probe microscopy(SPM),X-ray photoelectron spectroscopy(XPS),Fourier-transform infrared spectroscopy(FTIR),and X-ray diffraction(XRD).EP/FG coatings exhibited outstanding corrosion protection in comparison with blank EP and EP/rGO coatings mainly because the corrosion-promotion effect of rGO was *** anticorrosion ability of EP/FG coatingswasimproved with increased F-doped degree of *** addition,electrochemical impendance spectroscopy(EIS)results indicated that the Rc values of EP/FG-2 and EP/FG-3 were four orders of magnitude higher than those of EP/rGO in diluent NaCl solution(3.5 wt.%)after immersion for 90 days.

关键词： Graphene F-doped rGO Electrically insulating nanofillers Long-term anticorrosion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The conceptual development of the science-fiction industry and its main forms and features

引用

Cultures of Science 2024年第2期7卷 147-158页

作者： Yilin Xu wenjie zhao Ling Chen China Research Institute for Science Popularization Beijing University of Aeronautics and Astronautics

The term ‘science fiction(sci-fi) industry' has developed only in the past two decades in China. It has gone through special cultural, economic and political backgrounds in its conceptual development. After years of evolution and under the influence of some influential sci-fi intellectual properties, the sci-fi industry has developed typical forms such as reading material, film and television programs, games, derivative products and cultural tourism. These forms are also the major means for the generation of sci-fi content and the dissemination of sci-fi culture. The sci-fi industry has three key features: it integrates culture with science and technology as production factors; it has both production capacity and consumer appeal; and it is made up of interconnected vertical and horizontal production chains.

关键词： Science fiction sci-fi industry sci-fi forms sci-fi features China

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Mechanical properties of nanocomposites reinforced by carbon nanotube sponges

引用

Journal of Materiomics 2018年第2期4卷 157-164页

作者： wenjie zhao Tong Li Yupeng Li Daniel J.O'Brien Mauricio Terrones Bingqing Wei Jonghwan Suhr X.Lucas Lu Department of Mechanical Engineering University of DelawareNewarkDE 19716United States Center for Composite Materials University of DelawareNewarkDE 19716United States Weapons and Materials Research Directorate U.S.Army Research LaboratoryAberdeen Proving GroundMD 21005United States Department of Materials Science and Engineering The Pennsylvania State University104 Davey LabUniversity ParkPA 16802-6300United States Department of Physics and Center for 2-Dimensional and Layered Materials The Pennsylvania State University104 Davey LabUniversity ParkPA 16802-6300United States Research Center for Exotic Nanocarbons(JST) Shinshu UniversityWakasato 4-17-1Nagano380-8553Japan School of Mechanical Engineering&Department of Energy Science Sungkyunkwan University300 Chunchun-dongJangan-guSuwon 440-746South Korea

Carbon nanotube(CNT)sponge exhibits unique porous and hierarchical structure that are beneficial to the design of ultralight and tough *** this study,CNT sponges(undoped and boron doped)reinforced polydimethylsiloxane(PDMS)composites were *** properties of the composite,including compressive modulus,rate-dependent modulus,stress relaxation behaviors,dynamic viscoelastic properties,and their dependency on temperature,were systematically investigated.A micromechanical model,Mori-Tanaka model,was validated to describe the mechanical behaviors of CNT sponge reinforced *** coupling with boron-doped CNT sponge,PDMS composites showed remarkable improvement of mechanical properties,including compressive modulus(70%),viscous modulus(243%)and damping capacity(50%).Such reinforcement effects can be controlled by the morphology of CNT sponges,as the boron-doped and undoped nanocomposites showed distinct viscoelastic *** results proved that CNT sponge reinforcement is a promising strategy to develop engineering composites with both outstanding mechanical stiffness and controllable viscoelastic performances.

关键词： Carbon nanotube sponges Nanocomposite Viscoelastic Damping Micromechanics modeling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Preparation and Analytical Application of New macrocyclic hosts Chromatographic Separation Medium

Preparation and Analytical Application of New macrocyclic ho...

引用

河南省化学会2016年学术年会

作者： wenjie zhao Shusheng Zhang School of Chemistry and Chemical Engineering Henan Henan University of Technology

Along with the advances in the field of supramolecular chemistry, more and moer macrocyclic host molecules have emerged with excellent molecular recognition performance. How to promote separation selectivity via the molecular recognition of macrocylic host molecule ligands is an attracting subject in the overlapping area of modern chromatography with supramolecular chemistry. Modern separation and analysis requires muti-mode separation media with multiple interactions to deal with more and more complex sample matrix, so as to improve the efficiency, selectivity and sensitivity. In this dissertation,new type of macrocyclic host molecule, namely calix[2]arene[2]triazine and pillararene, were selected as chromatographic ligand, several bonded silica gel HPLC stationary phases and solid phase extraction sorbents were successfully prepared. Based on molecular recognition of macrocyclic host molecules,with the assistance of quantum chemistry, thermodynamics and linear salvation energy equation,chromatographic performance and retention mechanisms were discussed in detail.

关键词： calixarenetriazine pillararene stationary phase HPLC

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：