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Friction 2023年第7期11卷 1165-1176页

作者： Xuesong LIU Jun FAN Jibin PU Zhaoxia LU College of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China key laboratory of marine materials and Related technologies Key Laboratory of Marine Materials and Protective Technologies of Zhejiang ProvinceNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

High-entropy alloys have made significant progress in high mechanical properties,wear resistance,and corrosion resistance *** tribological properties,especially high-temperature lubrication,have become another sought *** this work,VAlTiCrW high-entropy alloy film with body-centered cubic(BCC)structure was prepared on superalloy substrate by magnetron *** is found that the VAlTiCrW film shows very low friction coefficient of 0.15 and a low wear rate of 10^(-5) orders of magnitude at 800℃.After 800℃oxidation,the film can still obtain a friction coefficient of no more than 0.2 at 700℃.XRD and TEM revealed the formation of ternary oxide AlV_(3)O_(9)with preferred orientation of(002)crystal plane with large spacing of 0.71 nm on the wear surface of the film,a high-temperature lubricating phase that has not been reported,realizes the low friction *** AlV_(3)O_(9)can be formed by tribochemical reaction under the thermal-mechanical action at 700℃,but pre-oxidation at 800℃is the prerequisite in order to form the precursors of V-rich and Al-rich oxide layer.

关键词： high entropy alloy high temperature friction AlV_(3)O_(9) oxide

Double-Layer Hydrogels with Tunable Mechanofluorochromic Response for Smart Display

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Chinese Journal of Polymer Science 2023年第4期41卷 547-555,I0007页

作者： Hui-Hui Shi Shuang-Shuang Wu Rui-Jia Wang Yi Zhang Shu-Hui An Wei Lu Tao Chen 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 SciencesNingbo315201China School of Chemical Sciences University of Chinese Academy of SciencesBeijing100049China

Mechanofluorochromic materials that render sensitive fluorescence color/pattern change upon mechanical stimuli have drawn extensive ***,traditional mechanofluorochromism relies on the chemical transformations of mechanophores,but their types are quite *** remains challenging to develop mechanofluorochromic materials with customized fluorescence color changing ***,a generally applicable strategy is proposed to present a class of double-layer mechanofluorochromic hydrogels based on the facile integration of two different-colored fluorescent *** to the UV transmittance change of top layer under Poisson’s effect,the emission intensity ratio of the upper and lower hydrogels exhibits a strain-dependent change,resulting in a force-triggered overlapping color *** the UV transmittance of top layer and the fluorescence emission of bottom layer can be readily modulated to enrich the variety of ***,the bottom layer is available to be printed by ion inks to fabricate patterned double-layer fluorescent hydrogel,holding great potential to design flexible mechanofluorochromic platforms for smart display and information encryption.

关键词： Mechanofluorochromism Fluorescent hydrogel Double layer Smart display

Anomalous enhancement oxidation of few-layer MoS_(2)and MoS_(2)/h-BN heterostructure

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Nano Research 2022年第8期15卷 7081-7090页

作者： Siming Ren Yanbin Shi Chaozhi Zhang Mingjun Cui Jibin Pu 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 key laboratory of Impact and Safety Engineering Ministry of Education of ChinaSchool of Mechanical Engineering and MechanicsNingbo UniversityNingbo 315211China

Because of profound applications of two-dimensional molybdenum disulfide(MoS_(2))and its heterostructures in electronics,its thermal stability has been spurred substantial *** employ a precision muffle furnace at a series of increasing temperatures up to 340℃to study the oxidation behavior of continuous MoS_(2)films by either directly growing mono-and fewlayer MoS_(2)on SiO_(2)/Si substrate,or by mechanically transferring monolayer MoS_(2)or hexagonal boron nitride(h-BN)onto monolayer MoS_(2)*** show that monolayer MoS_(2)can withstand high temperature at 340℃with less oxidation while the few-layer MoS_(2)films are completely oxidized just at 280℃,resulting from the growth-induced tensile strain in few-layer MoS_(2).When the tensile strain of films is released by transfer method,the stacked few-layer MoS_(2)films exhibit superior thermal stability and typical layer-by-layer oxidation behavior at similarly high ***,for the MoS_(2)/h-BN heterostructure,the h-BN film itself stacked on top is not damaged and forms many bubbles at 340℃,whereas the underlying monolayer MoS_(2)film is oxidized *** comprehensively using various experimental characterization and molecular dynamics calculations,such anomalous oxidation behavior of MoS_(2)/h-BN heterostructure is mainly due to the increased tensile strain in MoS_(2)film at elevated temperature.

关键词： molybdenum disulfide hexagonal boron nitride heterostructure enhancement oxidation tensile strain

Rational design of graphene/polymer composites with excellent electromagnetic interference shielding effectiveness and high thermal conductivity: a mini review

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Journal of materials Science & Technology 2022年第22期117卷 238-250页

作者： Xue Tan Qilong Yuan Mengting Qiu Jinhong Yu Nan Jiang Cheng-Te Lin Wen Dai key laboratory of marine materials and Related technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo 315201China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The integration and miniaturization of chips lead to inevitable overheating and increasing electromagnetic interference (EMI) problems, which threaten the performance, stability, and lifetime of electroniccomponents. Therefore, it is important to improve the heat dissipation and EMI shielding performancein device packaging for the steady operation of electronic products. In recent years, due to its intrinsic superior thermal conductivity, proper electrical conductivity, light-weight, and structural adjustability,graphene has been widely used as high thermal and conductive fillers incorporated in the polymer matrix to improve the thermal conductivity and electrical conductivity of composites. This review concludesthe recent development of graphene/polymer composites by using graphene as fillers to improve thethermal conductivity and EMI shielding effectiveness (EMI SE). The structure of graphene embedded inthe composites varies from zero-dimension (0D), one-dimension (1D) to two-dimensions (2D). Moreover,highly thermally and electrically conductive fillers with different dimensions were also modified on thegraphene to improve the composite performance. Finally, this review also makes prospects for the development trend of graphene/polymer composites with high thermal conductivity and EMI SE in the future.

关键词： Graphene/polymer composites Structural design Electromagnetic interference shielding Thermal conductivity

Influence of laser surface remelting on microstructure and degradation mechanism in simulated body fluid of Zn-0.5Zr alloy

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Journal of materials Science & Technology 2019年第11期35卷 2705-2713页

作者： Zheng Wang Qingke Zhang Robabeh Bagheri Pushan Guo Yirong Yao Lijing Yang Zhenlun Song 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 Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123China

In this study,the Zn-0.5 wt%Zr(Zn-Zr)alloy was treated by laser surface remelting(LSR),and then the microstructure and degradation mechanism of the remelting layer were investigated and compared with the original as-cast *** results reveal that after LSR,the bulky Zn(22)Zr phase in the original Zn-Zr alloy is dissolved and the coarse equiaxed grains transform into fine dendrites with a secondary dendrite arm space of about 100 *** the degradation process in simulated body fluid(SBF),the corrosion products usually concentrate at some certain areas in the original alloy,while the corrosion products distribute uniformly and loosely in the LSR-treated *** removing the corrosion products,it was found that the former suffers obvious pitting corrosion and then localized *** proposed mechanism is that corrosion initiates at grain boundaries and develops into the depth at some locations,and then leads to localized *** the LSR-treated sample,corrosion initiates at some active sites and propagates in all directions,corrosion takes place in the whole surface with distinctly uniform thickness reduction,while the localized corrosion and peeling of bulky Zn(22)Zr particles were *** electrochemical results also suggest the uniform corrosion of LSR-treated sample and localized corrosion of original *** on the results,a new approach to regulate the corrosion mode of the biodegradable Zn alloy is proposed.

关键词： Biodegradable Zn alloy Laser surface remelting Microstructure Degradation mechanism

Oligoaniline Assisted Dispersion of Carbon Nanotubes in Epoxy Matrixfor Achieving the Nanocomposites with Enhanced Mechanical, Thermaland Tribological Properties

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Chinese Journal of Polymer Science 2017年第3期35卷 446-454页

作者： Bin Chen Jia Chen Jing-yu Li Xin Tong 赵海超王立平 School of materials Science and Engineering Shenyang University of Chemical Technology Shenyang 11 O142 China key laboratory of marine materials and Related technologies Zhejiang Key Laboratory of Marine Materials andProtective Technologies Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China

A critical challenge for initiating many applications of the carbon nanotubes(CNTs) is their dispersion in organic solvent or in polymer melt. In the present study, we described a novel strategy for fabricating carbon nanotubes(CNTs)-reinforced epoxy nanocomposite by utilizing aniline trimer(AT) as the noncovalent dispersant. Tensile testing showed that the tensile modulus of the CNTs-reinforced epoxy composites was considerably improved by adding a small amount of AT functionalized CNTs. Additionally, the as-prepared CNTs-epoxy nanocomposites exhibited superior tribological properties with much lower frictional coefficients and wear rates compared to those of neat epoxy resin. The well dispersed AT-functionalized CNTs in epoxy matrix played an important role in enhancing the mechanical properties, as well as acting as a solid lubricant for improving the tribological performance of epoxy/CNTs nanocomposite.

关键词： Carbon nanotubes Epoxy Mechanical Tribological Nanocomposites

Achieving anti-corrosion and anti-biofouling dual-function self-healing coating by natural carrier attapulgite loading with 2-Undecylimidazoline

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Journal of materials Science & Technology 2023年第17期148卷 222-234页

作者： Yinghao Wu Jinming Wei Xiaolu Shi Wenjie Zhao 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 Ningbo New Material Testing and Evaluation Center Co. LtdNingbo 315048China

In the marine environment,the protective coatings face serious corrosion and biofouling problem,lim-itations,and challenges that made self-healing coatings unable to perform both anti-corrosion and anti-biofouling dual-function at the same *** we constructed the corrosion resistance and anti-biofouling self-healing coating by integrating nano-containers into the coating matrix,the 2-Undecylimidazoline(ULM)acted as a corrosion inhibitor and anti-biofouling dual-functional agent which was loaded on the natural container attapulgite(ATP).To obtain high healing efficiency,a fluidity-driven self-healing silicone oil coating was thickened by fibrous ATP to enhance its stability,which played a key role in the self-healing and long-term corrosion *** self-healing time of ULM@ATP rein-forced oil coating was 4 s at least in the air and up to 30 s in the 1 M HCl ***,the ULM@ATP can significantly enhance the corrosion resistance of the self-healing coating,with the best effect achieved when the content of ULM@ATP was 5 wt.%.The impedance modulus of ULM@ATP-2 still reached 1.62×10^(8)Ωcm^(2) after 480 immersion in 3.5 wt.%NaCl solution,which is 3 orders of magnitude high than pure Oil coating(2.17×10^(5)Ωcm^(2)).The restructure of the ATP network and the release of ULM could largely inhibit the corrosion of *** continuous open circuit potential of the compos-ite coating performed the potentially infinite self-healing *** self-healing performances of the composite coating in strong acid and base solutions exhibited high environmental *** anti-corrosion and anti-biofouling(the surface coverage of adhered chlorella decreased 96.88%)dual-function strategy of self-healing coatings could be also realized by many other porous nano-materials or function *** self-healing performances of the composite coating in strong acid and base solutions exhibited high environmental *** anti-corrosion and anti-biof

关键词： Self-healing Active corrosion resistance Anti-biofouling Attapulgite

Prussian Blue/Cellulose Acetate Thin Film Composite Nanofiltration Membrane for Molecular Sieving and Catalytic Fouling Resistance

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Chinese Journal of Polymer Science 2023年第4期41卷 593-604,I0009页

作者： Hai-Bo Lin Jian-Guo Zhao Na Lu Qiu Han Jian-Qiang Wang Jian-Min Guan Xiao Wang Fu Liu 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 SciencesNingbo315201China Qinghai University Qinghai810016China University of Chinese Academy of Sciences Beijing100049China

Nanofiltration(NF)membranes as high selective separators are appealing for molecular sieving,which still remains a great challenge for the mixed dyes with same *** this study,cellulose acetate(CA)membranes were firstly aminated by ethylene imine polymer(PEI),and then the thin film of metal organic frameworks(MOFs)were constructed onto aminated CA membrane through forward-diffusion,slow crystallization and in situ growth of Fe Co-Prussian blue(FeCo-PB)crystallization *** designed PB@CA composite NF membrane shows an ideal rejection for Congo red(CR)/methyl orange(MO)mixture solution,with 99.7%±0.2%for CR and 33.5%±2%for *** addition,the composite NF membrane demonstrated good efficiency for photocatalytic degradation of organic fouling(permeability recovery ratio was up to 92%)due to the active FeCo-PB ***,this work provides a practical strategy to prepare MOFs mediated thin film composite nanofiltration membrane for precise molecular sieving and catalytic antifouling performances.

关键词： Nanofiltration membrane Molecular sieving Catalytic fouling resistance Prussian blue

Efficient coating fabrication of onion-like carbon nanoparticles via aerosol deposition

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Particuology 2020年第6期18卷 58-62页

作者： Yaoyao Fu Yi Liu Hua Li 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 Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

In this work,an onion-like carbon(OLC)nanoparticle coating with a micron-sized thickness was fabricated via aerosol deposition(AD).During the room temperature impact consolidation(RTIC),the OLC nanoparticles(5-10 nm)experienced remarkable deformation along both the perpendicular and parallel directions to the coating-substiate *** deformation,mechanical interlocking,and van der Waals forces between the OLC particles were revealed as the major regimes for coating *** aerosol deposition technique might open new avenues for fabricating carbonaceous nanostructures for various functional applications.

关键词： Onion-like carbon Aerosol deposition Nanoparticles Thick film Particle deformation

Fracture mechanics of methane clathrate hydrates

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Acta Mechanica Sinica 2021年第9期37卷 1387-1394,I0002页

作者： Jinjie Liu Ke Xu Li Yang Yanwen Lin Tong Li Xuezheng Gao Zhisen Zhang Jianyang Wu Department of Physics Research Institute for Biomimetics and Soft MatterJiujiang Research Institute and Fujian Provincial Key Laboratory for Soft Functional Materials ResearchXiamen UniversityXiamen361005China 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 SciencesNingbo315201China

Fundamental mechanics of gas hydrates is of importance to evaluating geomechanical and geotechnical properties of gas hydrate deposits,but it remains largely unexplored yet due to insufficient direct experimental techniques and high-quality of gas hydrate ***,classic molecular dynamic(MD)simulations are used to study the fracture mechanics of three main methane clathrate hydrates of sI,sII and sH *** results show that the mechanical properties of those three methane clathrate hydrates are intrinsically different and are degraded by the presence of *** show brittle facture and different fracture *** terms of energy release rate,they are ranked as sH>sI>***,the three methane clathrate hydrates with nanocracks can be explained by a modified Griffith ***,it is intriguingly identified tip amorphization during the crack propagation process of the three methane clathrate hydrates,and sH methane clathrate hydrate with specific nanocrack exhibits slower crack propagation than other two methane clathrate hydrates.

关键词： Methane clathrate hydrates Young’s modulus Fracture toughness Griffith criterion Molecular dynamics