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Chinese Journal of Polymer Science 2020年第1期38卷 45-52,I0006页

作者： Yan Song Kai-Feng Chen Jing-Jing Wang Yuan Liu Tao Qi Guo Liang Li National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing WO 190China xiamen advanced materials academy of luoyang ship material research institute Xiamen 361101China Science and Technology on Marine Corrosion and Protection Laboratory Qingdao 266101China

One-component, catalyst-free self-healing coatings with double-shelled polymer microcapsules have drawn considerable attention due to wide applications. In this work, the synthesis parameters of double-shelled polymer microcapsules and the mechanism of the self-healing process were systematically investigated. Apart from the chemical structure of the microcapsule shell, the shell thickness, the microcapsule size,and the core fraction could affect the self-healing anticorrosion properties. The synthesis parameters were further optimized in terms of the agitation rate, p H, weight ratio of core to shell, and temperature. Under these conditions, the microcapsule shell consisting of a rough surface formed by poly(urea-formaldehyde) and a smooth inner wall by polyurethane was prepared. The size of the microcapsules and core fraction were calculated to be approximately 30 μm and 75%, respectively. The self-healing anticorrosion coating incorporating as-synthesized microcapsules exhibited corrosion resistance in artificially scratched areas, which was further characterized by electrochemical impedance spectroscopy.

关键词： Double-shelled Microcapsules Anticorrosion Self-healing

Electrochemical corrosion failure mechanism of M152 steel under a salt-spray environment

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International Journal of Minerals,Metallurgy and materials 2015年第11期22卷 1183-1189页

作者： Pan Yi Kui Xiao Kang-kang Ding Xu Wang Li-dan Yan Cheng-liang Mao Chao-fang Dong Xiao-gang Li Corrosion and Protection Center University of Science and Technology Beijing institute of advanced materials and Technology University of Science and Technology Beijing State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research Institute Ningbo institute of material Technology & Engineering Chinese Academy of Sciences

The corrosion failure mechanism of M152 was studied using the neutral salt-spray test to better understand the corrosion behavior of 1Cr12Ni3Mo2VN（M152）, provide a basis for the optimization of material selection, and prevent the occurrence of failure. Moreover, the mechanism was investigated using the mass loss method, polarization curves, electrochemical impedance spectroscopy（EIS）, stereology microscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy（EDS）. The results show that M152 steel suffers severe corrosion, especially pitting corrosion, in a high-salt-spray environment. In the early stage of the experiment, the color of the corrosion products was mainly orange. The products then gradually evolved into a dense, brown substance, which coincided with a decrease of corrosion rate. Correspondingly, the EIS spectrum of M152 in the late test also exhibited three time constants and presented Warburg impedance at low frequencies.

关键词： heat-resistant steel electrochemical corrosion failure mechanism salt spray test

Mechanically robust antifouling coating with dual-functional antifouling strategy by infiltrating PDMS into plasma-sprayed porous Al_(2)O_(3)-Cu coating

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Journal of materials Science & Technology 2023年第28期159卷 125-137页

作者： Shuaiqiang Bi Kangwei Xu Guosheng Shao Ke Yang Jiajia Tian State Centre for International Cooperation on Designer Low-Carbon and Environmental material(SCICDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou450001China Henan institute of advanced Technology Zhengzhou UniversityZhengzhou450001China Special Functional materials Department Luoyang Ship Material Research InstituteLuoyang471023China institute of Metal research Chinese Academy of SciencesShenyang110016China

Marine biofouling is a worldwide challenge that needs to be solved ***(dimethylsiloxane)(PDMS)-based fouling release coatings with low surface free energy(SFE)could effectively inhibit ***,their poor mechanical durability,adhesive strength,and antifouling performance under static conditions significantly limit their ***,a novel mechanically robust Al_(2)O_(3)-PDMS-Cu composite coating with strong adhesive strength and remarkable antifouling performance was *** Al_(2)O_(3)-PDMS-Cu coating loaded with a small amount of Cu was fabricated by infiltrating PDMS into plasma-sprayed micro/nano-scaled porous Al_(2)O_(3)-Cu *** showed that the fabri-cation of this Al_(2)O_(3)-PDMS-Cu coating did not alter the surface hydrophobicity and SFE of PDMS signif-icantly,thus presenting little influence on its inherent fouling release *** rigorous abrasion test,the Al_(2)O_(3)-PDMS-Cu coating presented remarkably improved surface hydrophobicity due to the ex-posure of micro/nano structure,rather than falling offas that of PDMS *** combination of excel-lent abrasion resistance and one order of magnitude higher adhesive strength and hardness than PDMS coating contributed to the outstanding mechanical robustness of Al_(2)O_(3)-PDMS-Cu ***,the antifouling assays against marine bacteria adhesion(95%reduction rate for Escherichia coli.(***))and algae attachment(96%and 94%reduction rates for Chlorella and Phaeodactylum tricornutum(***-nutum),respectively after 21 days of incubation)demonstrated the superior antifouling performance of the Al_(2)O_(3)-PDMS-Cu ***,a high-performance Al_(2)O_(3)-PDMS-Cu antifouling coating with excellent mechanical robustness and long-term antifouling performance was achieved via the combination of me-chanical durability of Al_(2)O_(3)skeleton and the dual-functional antifouling strategy,i.e.,the fouling release property of PDMS and fouling r

关键词： Marine antifouling Al_(2)O_(3)-PDMS-Cu composite coating Plasma spraying Mechanical robustness Dual-functional strategy Long-lasting antifouling

Promise of commercialization: Carbon materials for low-cost perovskite solar cells

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Chinese Physics B 2018年第1期27卷 19-36页

作者：蔡宇梁禄生高鹏 Department of Chemistry Fujian Normal University Laboratory for advanced Functional materials Xiamen Institute of Rare-earth MaterialsChinese Academy of Science

Perovskite solar cells （PVSCs） have attracted extensive studies due to their high power conversion efficiency （PCE） with low-cost in both raw material and processes. However, there remain obstacles that hinder the way to their commer- cialization. Among many drawbacks in PVSCs, we note the problems brought by the use of noble metal counter electrodes （CEs） such as gold and silver. The costly Au and Ag need high energy-consumption thermal evaporation process which can be made only with expensive evaporation equipment under vacuum. All the factors elevate the threshold of PVSCs＇ commercialization. Carbon material, on the other hand, is a readily available electrode candidate for the application as CE in the PVSCs. In this review, endeavors on PVSCs with low-cost carbon materials will be comprehensively discussed based on different device structures and carbon compositions. We believe that the PVSCs with carbon-based CE hold the promise of commercialization of this new technology.

关键词： perovskite solar cell counter electrode carbon material commercialization

A novel(Sm_(0.2)Eu_(0.2)Gd_(0.2)Ho_(0.2)Yb_(0.2))CrO_(3)high-entropy ceramic nanofiber as a negative temperature coefficient thermistor

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Journal of Rare Earths 2024年第10期42卷 1937-1942页

作者： Weijun Zhao Meng Zhang Liyan Xue Kaixian Wang Fan Yang Jiuping Zhong Heng Chen School of materials Sun Yat-sen UniversityShenzhen518107China xiamen institute of Rare Earth materials Haixi InstituteChinese Academy of SciencesXiamen361021China xiamen Key Laboratory of Rare Earth Photoelectric Functional materials Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen361021China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China advanced Energy Science and Technology Guangdong Laboratory Huizhou516003China Sichuan Jcc Rare Earth Metals New material Co. Ltd.Chengdu610000China

The electrical properties of high-entropy ceramics(HECs)have been extensively studied in recent years due to their unique structural characteristics and fascinating functional properties induced by entropy *** high-entropy(Sm_(0.2)Eu_(0.2)Gd_(0.2)Ho_(0.2)Yb_(0.2))CrO_(3)(HE-RECrO_(3))nanofibers were prepared by electro *** work demonstrates that HE-RECrO_(3)nanofibe rs were successfully synthesized at a low temperature(800℃),which is approximately 400℃lower than the temperatures at which chromate ceramics were synthesized via the sol-gel method and the solid-state reaction *** resistivity of HE-RECrO_(3)nanofibers decreases exponentially with increasing temperature from 25 to600℃.The logarithm of the resistivity is linearly related to the inverse of the temperature,confirming the negative temperature coefficient property of HE-RECrO_(3)*** B_(25/50)value of the HERECrO_(3)nanofibers reaches 4072 *** conclusion,HE-RECrO_(3)nanofibers are expected to be potential candidates for negative-temperature-coefficient(NTC)thermistors.

关键词： Rare earths High-entropy ceramics Ceramic fiber materials Negative temperature coefficient thermistors

Grain growth behavior and properties of high-entropy pseudobrookite(Mg,Co,Ni,Zn)Ti_(2)O_(5) ceramics

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Journal of advanced Ceramics 2024年第6期13卷 757-768页

作者： Xiaohui Ma Jinyu Wu Lingyi Meng Jinfeng Zhang Heng Chen Liwen Yan Anran Guo Jiachen Liu Key Laboratory of advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China xiamen Key Laboratory of Rare Earth Photoelectric Functional materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021China

It is well known that the grain size of high-entropy ceramics is quite small owing to the sluggish diffusion effect. However, abnormal grain growth often occurs in high-entropy pseudobrookite ceramics, ultimately resulting in the formation of many abnormally grown grains with a grain size as large as 50 μm. To study this phenomenon, the grain growth behavior of high-entropy pseudobrookite ceramics was systematically investigated in this paper. The results demonstrate that the starting material powders first react with each other to form a high-entropy intermediate phase and calcined TiO_(2) powders (TiO_(2)-1100 ℃), and then as the sintering temperature increases, the formed high-entropy intermediate phase further reacts with TiO_(2)-1100 ℃ to form high-entropy pseudobrookite ceramics. Thus, in this system, in addition to the sluggish diffusion effect, the grain sizes of the high-entropy intermediate phase and TiO_(2)-1100 ℃ also affect the morphology of high-entropy pseudobrookite. Compared to nanosized TiO_(2), micron-sized TiO_(2) has a lower sintering activity. Therefore, the high-entropy intermediate phases (Mg,Co,Ni,Zn)TiO_(3) and TiO_(2)-1100 ℃ prepared with micron-sized starting materials exhibit lower grain sizes, finally resulting in the formation of high-entropy (Mg,Co,Ni,Zn)Ti_(2)O_(5) with small grain sizes. Moreover, nano-indentation and thermal conductivity tests were carried out on high-entropy (Mg,Co,Ni,Zn)Ti_(2)O_(5) with different morphologies. The results show that the hardness of high-entropy (Mg,Co,Ni,Zn)Ti_(2)O_(5) increases from 6.05 to 9.95 GPa as the grain size increases, whereas the thermal conductivity decreases from 2.091±0.006 to 1.583±0.006 W·m^(−1)·K^(−1). All these results indicate that high-entropy (Mg,Co,Ni,Zn)Ti_(2)O_(5) with a small grain size is a potential material for thermal protection.

关键词： grain size sluggish diffusion effect two-step solid phase process high-entropy intermediate phase high-entropy pseudobrookite ceramic

Strengthening strategy for high-performance friction stir lap welded joints based on 5083 Al alloy

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International Journal of Minerals,Metallurgy and materials 2024年第11期31卷 2498-2507页

作者： Yujia Shen Jijie Wang Beibei Wang Peng Xue Fengchao Liu Dingrui Ni Bolv Xiao Zongyi Ma College of material Science and Engineering Shenyang Aerospace UniversityShenyang 110136China Shi-changxu Innovation Center for advanced materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China CAS Key Laboratory of Nuclear materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Binzhou institute of Technology Shandong Key Laboratory of Advanced Aluminium Materials and TechnologyWeiqiao-UCAS Science and Technology ParkBinzhou 256606China Centre of Excellence for advanced materials Dongguan 523808China

During aircraft,ship,and automobile manufacturing,lap structures are frequently produced among Al alloy skins,wall panels,and *** occurrence of welding defects severely decreases mechanical properties during friction stir lap welding(FSLW).This study focuses on investigating the effects of rotation rate,multipass welding,and cooling methods on lap defect formation,microstructural evolution,and mechanical *** defects were eliminated by decreasing welding speed,applying two-pass FLSW with a small welding tool,and introducing additional water cooling,thus leading to a remarkable increase in effective sheet thickness and lap *** above strategy yielded defect-free joints with an ultrafine-grained microstructure and increased tensile shear force from 298 to 551 N/*** fracture behavior of FSLW joints was systematically studied,and a fracture factor of lap joints was proposed to predict their fracture *** reducing the rotation rate,using two-pass welding,and employing additional water cooling strategies,an enlarged,strengthened,and defect-free lap zone with refined ultrafine grains was achieved with a quality comparable to that of lap welds based on 7xxx Al ***,this study provides a valuable FSLW method for eliminating hook defects and improving joint performance.

关键词： friction stir lap welding defect control microstructure fracture mechanisms mechanical properties

A novel self-activated ultraviolet persistent luminescence material and its anti-counterfeiting application based on intensity and time resolution from persistent luminescence

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Journal of Rare Earths 2022年第9期40卷 1417-1423,I0003页

作者： Shanshan Peng Lin Liu Lizhen Wang Rui Rong Liang Song Weixiong You Junpeng Shi Yun Zhang Faculty of materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China xiamen Key Laboratory of Rare Earth Photoelectric Functional materials Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021China University of Chinese academy of Sciences Beijing 100049China Ganjiang Innovation academy Chinese Academy of SciencesGanzhou 341000China

Recently,the ultraviolet(UV)persistent luminescence material(PLM)has attracted extensive ***,the design and development of new UV PLM and exploring their promising advanced application remain ***,we developed a new dopant-free self-activated UVA PLM,Zn_(2)Al_(2)SiO_(7),which could be applied in anti-counterfeiting ***_(2)Al_(2)SiO_(7)shows UVA persistent luminescence(PersL)peaking at 380 nm after 254 nm UV lamp *** of Yb^(3+),the UVA PersL intensity and time are raised obviously,and the UVA PersL time lasts more than 24 *** addition,Yb^(3+)-doped Zn_(2)Al_(2)SiO_(7)exhibits photostimulated properties with different light ***,we design anticounterfeiting pattern based on intensity and time resolution from PersL of Zn_(2)Al_(2)SiO_(7),showing its advantages in the anti-counterfeiting field.

关键词： Persistent luminescence Ultraviolet Anti-counterfeiting Self-activated Rare earths

Dynamic asymmetric mechanical responsive carbon nanotube fiber for ionic logic gate

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Chinese Chemical Letters 2024年第6期35卷 249-253页

作者： Pei Cao Yilan Wang Lejian Yu Miao Wang Liming Zhao Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy materials of Fujian Province(IKKEM) Xiamen 361005China The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Department of BiomaterialsResearch Center of Biomedical Engineering of XiamenCollege of MaterialsXiamen UniversityXiamen 361005China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China institute of Artificial Intelligence Xiamen UniversityXiamen 361005China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China Engineering research Center of Electrochemical Technologies of Ministry of Education Xiamen UniversityXiamen 361005China

Inspired by biological ion channels,numerous artificial asymmetric ion channels have been synthesized to facilitate the fabrication of ionic ***,the creation of biomimetic asymmetric ion channels necessitates expensive scientific apparatus and intricate material processing procedures,which constrains its advancement within the realm of ionic *** this study,we have devised dynamic asymmetric ion channels with mechanical responsiveness by combining polymers of varying elastic modulus along the longitudinal axis of carbon nanotube fiber(CNTF).The ion rectification can be modulated via the disparate response of CNTF-based ion channels to mechanical *** have effectively employed these asymmetric ion channels with mechanical sensitivity in the design of a logic gate device,achieving logic operations such as“AND”and“OR”.The conception of these dynamic asymmetric ion channels with mechanical sensitivity offers a straightforward,cost-effective,and versatile approach for generating ion channels,highlighting their potential application in intricate,highly integrated ionic circuits.

关键词： Carbon nanotubes fibers Mechanical response Rectification effect Ionic logic gate

High-capacity potassium ion storage mechanisms in a soft carbon revealed by solid-state NMR spectroscopy

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Rare Metals 2022年第11期41卷 3752-3761页

作者： Jing-Heng Han Jia He Qi-Yao Zou Jie Zhang Zhi Yang Zhi-Wei Zhao Hui-Xin Chen Hong-Jun Yue Da-Wei Wang Hai-Chen Lin Hao-Dong Liu Gui-Ming Zhong Zhang-Quan Peng College of Chemistry and material Science Fujian Normal UniversityFuzhou350000China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China xiamen Key Laboratory of Rare Earth Photoelectric Functional materials Xiamen Institute of Rare-Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen361021China Laboratory of advanced Spectro-Electrochemistry and Li-Ion Batteries Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China Key Laboratory of Automobile materials of Ministry of Education&School of materials Science and Engineering Jilin UniversityChangchun130025China Chemical Engineering University of California San DiegoLa JollaSan DiegoCA92093USA

Carbon materials are crucially important for the realization of potassium-ion ***,the potassium storage mechanisms in various carbon materials are incompletely ***,solid-state ^(13)C nuclear magnetic resonance(NMR) spectroscopy coupled with Raman and X-ray diffraction(XRD) techniques are employed to study the reaction mechanism in a soft carbon *** is revealed that the insertion of potassium ions into the soft carbon firstly induces a transformation of the disordered region to short-range ordered stacking,involving both the pristine local unorganized and organized carbon ***,potassium ions intercalate into the rearranged carbon structure,finally producing the nano-sized KC_(8).Moreover,a remarkable c apacity of 322 mAh·g^(-1) with a low mid potassiation voltage of <0.3 V is present for the prepared soft carbon,which is on account of the underlying potassium storage sites,including the disordered stacking carbon as a main component of the soft *** results suggest that regulating the disordered stacking region in the turbostratic structure of soft carbon is a critical issue for further improving the potassium storage performance.

关键词： Reaction mechanism Soft carbon Solid-state nuclear magnetic resonance(NMR) Anode Potassium-ion batteries(PIBs)