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Chinese Journal of Mechanical Engineering 2007年第1期20卷 44-46页

作者： LI Xiaoquan du zeyu YANG Xuguang School of Matenals Science and Engineenng Tianjin University Tianjin 300072 China School of Mataials Science and Engineenng Jiangsu University of Science and Technology Zhenjiang 212003 China

For characteristics of open and far from thermodynamic equilibrium in welding chemical reaction, a new kind of quantitative method, which is used to analyze direction and extent for chemical reaction of SiO2/Fe during quasi-steady state period, is introduced with the concept of non-equilibrium stationary state. The main idea is based on thermodynamic driving forces, which result in non-zero thermodynamic fluxes and lead to chemical reaction far away from thermodynamic equilibrium. There exists certain dynamic equilibrium relationship between rates of diffusion fluxes in liquid phase of reactants or products and the rate equation of chemical reaction when welding is in quasi-steady state. As result of this, a group of non-linear equations containing concentrations of all substances at interface of slag/liquid-metal may be established. Moreover the stability of this non-equilibrium stationary state is discussed using dissipative structure theory and it is concluded theoretically that this non-equilibrium stationary state for welding chemical reaction is of stability.

关键词： Welding chemical metallurgy Non-equilibrium stationary state Dissipative structure Stability

The chain-shaped coordination polymers based on the bowl-like Ln_(18)_(Ni24(23.5))clusters exhibiting favorable low-field magnetocaloric effect

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Chinese Chemical Letters 2021年第12期32卷 3803-3806页

作者： Ningfang Li Qingfang Lin Yemin Han zeyu du Yan Xu College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 210093China Department of Chemistry Bengbu Medical CollegeBengbu 233030China

The design of assembling high-nuclearity transition-lanthanide(3d-4f) clusters along with excellent magnetocaloric effect(MCE) is one of the most prominent fields but is extremely challenging. Herein, two heterometallic metal coordination polymers are constructed via the “carbonatetemplate” method, formulated as {[Gd_(18)Ni_(24)(IDA)_(22)(CO_(3))_(7)(μ_(3)-OH)_(32)(μ_(2)-OH)_(3)(H_(2)O)_(5)Cl]·Cl_(8)·(H_(2)O)_(14)}nand{[Eu_(18)Ni_(23.5)(IDA)_(22)(CO_(3)_(7)(μ_(3)-OH)_(32)(H_(2)O)_(5)(IN)(CH_(3)COO)_(2)(NH_(2)CH_(2)COO)Cl]·C_(l6)·(H_(2)O)_(17)}n[abbreviated as 1-(Gd_(18)Ni_(24))nand 2-(Eu_(18)Ni_(23.5))n respectively;H_(2)IDA = iminodiacetic acid;HIN = isonicotinic acid]. Concerning the structures, compounds 1-(Gd_(18)Ni_(24))nand 2-(Eu_(18)Ni_(23.5))nboth feature the one-dimensional(1D) chain-like structure which is rarely reported in high-nuclearity metal complexes. Meanwhile, the large presences of Gd3+ ions in compound 1-(Gd18Ni24)nare conducive to the fantastic MCE, and the value of-ΔS_(m)is 35.30 J kg^(-1)K^(-1) at 3.0 K and ΔH = 7.0 T. And more significantly, compound 1-Gd_(18)Ni_(24)n shows the large low-field magnetic entropy change(-ΔS_(m)= 20.95 J kg(-1) K(-1) at 2.0 K and ΔH = 2.0 T)among the published 3 d-4 f mixed metal clusters.

关键词： 3d-4f Anionic templets Chain-like structure High-nuclearity clusters Magnetic refrigeration Mixed-ligand method

METAL SURFACE MODIFICATION──RESEARCH OF BRUSH PLATING TECHNOLOGY OF CrLAYER

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Chinese Journal of Mechanical Engineering 1996年第1期9卷 21-24页

作者： du zeyu YuQun (Tianjin University)

Trivalen t Cr layers are studied by direct current brush- plating and pulse current brush-plating. Under the SEM,the appearence,the morphology of cross sections and normal sec- tions of the layers are observed and analysed,the hardness, bond intensities and corrosion- resis- tance are measured. Then, the election- probe and X ray diffraction instruments are used to study the bond and harden mechanism of lavers,The result of research shows that: the harden ef- fect of the layers is caused by the extra- fine grains and internal stress in the layers. And the lay- ers and basis are joined by mechanical bond,metal bond and diffuse bond. All these kinds of bonds lie on different places of interface, they make the layers and base metal unit well.

关键词： Brush-plating Trivalent Cr Pulse brush- plating Mechanism

Four novel Z-shaped hexanuclear vanadium oxide clusters as efficient heterogeneous catalysts for cycloaddition of CO_(2) and oxidative desulfurization reactions

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Chinese Chemical Letters 2023年第1期34卷 478-482页

作者： Jilei Wang Jiapeng Cao zeyu du Xiaomei Liu Jianian Li Qingdong Ping Tingting Zang Yan Xu College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 211800China Coordination Chemistry Institute State Key Laboratory of Coordination ChemistryNanjing UniversityNanjing 210093China

Chemical fixation of CO_(2)into C1 source, as a general approach, can effectively alleviate the emission of greenhouse gasses. Whereas, the challenge posed by the need for efficient catalysts with high catalytic active sites still exists. In this work, we reported a series of new hexavanadate clusters, [(C6H6ON)2(C2H8N2)2(CH3O)6VIV6O8](V6–1), [(C6H6ON)2(C3H10N2)2(CH3O)6VIV6O8](V6–2), [(C6H6ON)2(C6H14N2)2(CH3O)6VIV6O8](V6–3) and [(C6H6ON)2(C4H11N2O)2(CH3O)4VIV6O8](V6–4), assembled by 2-aminophenol and four different kinds of Lewis bases(LB), ethanediamine(en), 1,2-diaminopropane, 1,2-cyclohexanediamine and N-(2-hydroxyethyl)ethylenediamine(ben) together. Among them, the basic unit {V6} cluster featured Z-shaped configuration represents a brand-new example of hexanuclear vanadium clusters. Remarkably, the catalytic tests demonstrated that V6–1 as catalyst displays high catalytic activity in the cycloaddition for the CO_(2)fixation into cyclic carbonates by virtue of open V sites. As expected, for oxidative desulfurization of sulfides, V6–1 also exhibits satisfied catalytic effectiveness. Furthermore, the recycling test confirmed that catalyst V6–1 may be a bifunctional heterogeneous catalyst with great promise for both CO_(2)cycloaddition and oxidative desulfurization reactions.

关键词： Z-shaped Hexavanadate cluster Lewis acid catalyst Cycloaddition of CO_(2) Oxidative desulfurization

Altitude pattern of carbon stocks in desert grasslands of an arid land region

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Research in Cold and Arid Regions 2018年第5期10卷 404-412页

作者： Rong Yang JunQia Kong zeyu du YongZhong Su Linze Inland River Basin Research Station Key Laboratory of Ecohydrology of Inland River Basin Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences

For estimating the altitude-distribution pattern of carbon stocks in desert grasslands and analyzing the possible mechanism for this distribution, a detailed study was performed through a series of field vegetation surveys and soil samplings from 90 vegetation plots and 45 soil profiles at 9 sites of the Hexi Corridor region, Northwestern China. Aboveground, belowground, and litter-fall biomass-carbon stocks ranged from 43 to 109, 23 to 64, and 5 to 20 g/m2, with mean values of 80.82,44.91, and 12.15 g/m2, respectively. Soil-carbon stocks varied between 2.88 and 3.98 kg/m2, with a mean value of 3.43 kg/m2 in the 0–100-cm soil layer. Both biomass-and soil-carbon stocks had an increasing tendency corresponding to the altitudinal gradient. A significantly negative correlation was found between soil-carbon stock and mean annual temperature, with further better correlations between soil-and biomass-carbon stocks, and mean annual precipitation. Furthermore, soil carbon was found to be positively correlated with soil-silt and-clay content, and negatively correlated with soil bulk density and the volume percent of gravel. It can be concluded that variations in soil texture and climate condition were the key factors influencing the altitudinal pattern of carbon stocks in this desert-grassland ecosystem. Thus, by using the linear-regression functions between altitude and carbon stocks, approximately 4.18 Tg carbon were predicted from the 1,260 km2 of desert grasslands in the study area.

关键词： altitudinal gradient soil organic carbon biomass carbon soil bulk density desert grasslands

Bioinspired super-hydrophilic zwitterionic polymer armor combats thrombosis and infection of vascular catheters

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Bioactive Materials 2024年第7期37卷 493-504页

作者： You Ke Haotian Meng zeyu du Wentai Zhang Qing Ma Yuting Huang Linxian Cui Yifeng Lei Zhilu Yang Dongguan Key Laboratory of Smart Biomaterials and Regenerative Medicine The Tenth Affiliated HospitalSouthern Medical UniversityDongguanGuangdong523000China School of Materials Science and Engineering Key Lab of Advanced Technology for Materials of Education MinistrySouthwest Jiaotong UniversityChengduSichuan610031China Geriatric Diseases Institute of Chengdu/Cancer Prevention and Treatment Institute of Chengdu Department of CardiologyChengdu Fifth People’s Hospital(The Second Clinical Medical CollegeAffiliated Fifth People’s Hospital of Chengdu University of Traditional Chinese Medicine)ChengduSichuan611137China The Institute of Technological Science Wuhan UniversityWuhan430072China

Thrombosis and infection are two major complications associated with central venous catheters(CVCs),which significantly contribute to morbidity and *** coating strategies currently represent an efficient approach for addressing such ***,existing antifouling coatings have limitations in terms of both duration and ***,we propose a durable zwitterionic polymer armor for *** armor is realized by pre-coating with a robust phenol-polyamine film inspired by insect sclerotization,followed by grafting of poly-2-methacryloyloxyethyl phosphorylcholine(pMPC)via in-situ radical *** resulting pMPC coating armor exhibits super-hydrophilicity,thereby forming a highly hydrated shell that effectively prevents bacterial adhesion and inhibits the adsorption and activation of fibrinogen and platelets in *** practical applications,the armored catheters significantly reduced inflammation and prevented biofilm formation in a rat subcutaneous infection model,as well as inhibited thrombus formation in a rabbit jugular vein ***,our robust zwitterionic polymer coating presents a promising solution for reducing infections and thrombosis associated with vascular catheters.

关键词： Anti-infection Antithrombosis Phenol-polyamine Super-hydrophilicity Zwitterionic polymers

Zwitterionic polymers-armored amyloid-like protein surface combats thrombosis and biofouling

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Bioactive Materials 2024年第2期32卷 37-51页

作者： Xiaohui Mou Wan Miao Wentai Zhang Wenxuan Wang Qing Ma zeyu du Xin Li Nan Huang Zhilu Yang School of Materials Science and Engineering Key Lab of Advanced Technology of Materials of Education MinistrySouthwest Jiaotong UniversityChengdu610031China Dongguan Key Laboratory of Smart Biomaterials and Regenerative Medicine The Tenth Affiliated Hospital of Southern Medical UniversityDongguanGuangdong523000China Department of Cardiology Third People’s Hospital of Chengdu Affiliated to Southwest Jiaotong UniversityChengduSichuan 610072China

Proteins,cells and bacteria adhering to the surface of medical devices can lead to thrombosis and infection,resulting in significant clinical ***,we report a zwitterionic polymers-armored amyloid-like protein surface engineering strategy we called as“armored-tank”strategy for dual functionalization of medical ***“armored-tank”strategy is realized by decoration of partially conformational transformed LZM(PCTL)assembly through oxidant-mediated process,followed by armoring with super-hydrophilic poly-2-methacryloyloxyethyl phosphorylcholine(pMPC).The outer armor of the“armored-tank”shows potent and durable zone defense against fibrinogen,platelet and bacteria adhesion,leading to long-term antithrombogenic properties over 14 days in vivo without ***,the“fired”PCTL from“armored-tank”actively and effectively kills both Gram-positive and Gram-negative bacterial over 30 days as a supplement to the lacking bactericidal functions of passive outer ***,this“armored-tank”surface engineering strategy serves as a promising solution for preventing biofouling and thrombotic occlusion of medical devices.

关键词： Amyloid-like protein Antifouling Antithrombosis Super-Hydrophilicity Zwitterionic polymers

An insect sclerotization-inspired antifouling armor on biomedical devices combats thrombosis and embedding

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Bioactive Materials 2024年第3期33卷 562-571页

作者： Nan Lyu Daihua Deng Yuting Xiang zeyu du Xiaohui Mou Qing Ma Nan Huang Jing Lu Xin Li Zhilu Yang Wentai Zhang Dongguan Key Laboratory of Smart Biomaterials and Regenerative Medicine Department of CardiologyThe Tenth Affiliated HospitalSouthern Medical UniversityDongguanGuangdong523059China GuangZhou Nanchuang Mount Everest Company for Medical Science and Technology GuangzhouGuangdong510670China Department of Anesthesiology Sichuan Academy of Medical Sciences&Sichuan Provincial People’s HospitalSchool of MedicineUniversity of Electronic Science and Technology of Chin1ChengduSichuan610072China Department of Cardiology Third People’s Hospital of Chengdu Affiliated to Southwest Jiaotong UniversityChengduSichuan610072China Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation Southern Medical UniversityGuangzhouGuangdong510080China

Thrombus formation and tissue embedding significantly impair the clinical efficacy and retrievability of temporary interventional medical ***,we report an insect sclerotization-inspired antifouling armor for tailoring temporary interventional devices with durable resistance to protein adsorption and the following protein-mediated *** mimicking the phenol-polyamine chemistry assisted by phenol oxidases during sclerotization,we develop a facile one-step method to crosslink bovine serum albumin(BSA)with oxidized hydrocaffeic acid(HCA),resulting in a stable and universal BSA@HCA ***,the surface of the BSA@HCA armor,enriched with carboxyl groups,supports the secondary grafting of polyethylene glycol(PEG),further enhancing both its antifouling performance and *** synergy of robustly immobilized BSA and covalently grafted PEG provide potent resistance to the adhesion of proteins,platelets,and vascular cells in *** ex vivo blood circulation experiment,the armored surface reduces thrombus formation by 95%.Moreover,the antifouling armor retained over 60%of its fouling resistance after 28 days of immersion in ***,our armor engineering strategy presents a promising solution for enhancing the antifouling properties and clinical performance of temporary interventional medical devices.

关键词： Antifouling Temporary interventional devices Insect sclerotization Phenol-polyamine chemistry Universal armor

Mimicking Mytilus edulis foot protein:A versatile strategy for robust biomedical coatings

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The Innovation 2024年第5期5卷 73-82,72页

作者： zeyu du Feng Qiao Liping Tong Wentai Zhang Xiaohui Mou Xin Zhao Manfred FMaitz Huaiyu Wang Nan Huang Zhilu Yang School of Materials Science and Engineering Department of CardiologyThird People’s Hospital of Chengdu Affiliated with Southwest Jiaotong UniversitySouthwest Jiaotong UniversityChengdu 610031China Dongguan Key Laboratory of Smart Biomaterials and Regenerative Medicine The Tenth Affiliated Hospital of Southern Medical UniversityDongguan 523059China Institute of Biomedicine and Biotechnology Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHung HomHong KongChina Max Bergmann Center of Biomaterials Dresden Leibniz Institute of Polymer Research DresdenHohe Strasse 601069 DresdenGermany The Key Laboratory of Biomedical Imaging Science and System Chinese Academy of SciencesShenzhen 518055China GuangZhou Nanchuang Mount Everest Company for Medical Science and Technology Guangzhou 510670China

Universal coatings with versatile surface adhesion,good mechanochemical robustness,and the capacity for secondary modification are of great scientific ***,incorporating these advantages into a system is still a great ***,we report a series of catechol-decorated polyallylamines(CPAs),denoted as pseudo-Mytilus edulis foot protein 5(pseudoMefp-5),that mimic not only the catechol and amine groups but also the backbone of *** can fabricate highly adhesive,robust,multifunctional polyCPA(PCPA)coatings based on synergetic catechol-polyamine chemistry as universal building *** to the interpenetrating entangled network architectures,these coatings exhibit high chemical robustness against harsh conditions(HCl,pH 1;NaOH,pH 14;H2O2,30%),good mechanical robustness,and wear *** addition,PCPA coatings provide abundant grafting sites,enabling the fabrication of various functional surfaces through secondary ***,the versatility,multifaceted robustness,and scalability of PCPA coatings indicate their great potential for surface engineering,especially for withstanding harsh conditions in multipurpose biomedical applications.

关键词： wear catechol versatile

From surface to bulk modification: Plasma polymerization of amine-bearing coating by synergic strategy of biomolecule grafting and nitric oxide loading

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Bioactive Materials 2020年第1期5卷 17-25页

作者： Tong Yang zeyu du Hua Qiu Peng Gao Xin Zhao Huaiyu Wang Qiufen Tu Kaiqin Xiong Nan Huang Zhilu Yang Key Laboratory of Advanced Technology for Materials of the Education Ministry School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHung HomHong KongChina Institute of Biomedicine and Biotechnology Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055China

Integration of two or more biomolecules with synergetic and complementary effects on a material surface can help to obtain multi-functions for various biomedical ***,the amounts of biomolecules integrated and their physiological functions are compromised due to the limited surface anchoring ***,we propose a novel concept of film engineering strategy“from surface to bulk synergetic modification”.This new concept is realized by employing the surface amine groups of plasma polymerized allylamine(PPAm)film for grafting a molecule e.g.,thrombin inhibitor,bivalirudin(BVLD),meanwhile its bulk amine groups is used as a universal depot for storing and releasing therapeutic nitric oxide(NO)gas as supplement to the functions of *** is demonstrated that such a“from surface to bulk synergetic modification”film engineering can impart the modified-substrates with anti-platelet and anti-coagulant dual functions,giving rise to a highly endotheliummimetic thromboresistant *** believe that our research provides a very promising strategy to deliver multifunctional surface versatilely that require NO release in combination with other properties,which will find broad biomedical applications in blood-contacting devices,and et ***,it also provides a brand-new film engineering strategy for tailoring surface multi-functionalities of a wide range of materials.

关键词： Surface chemistry Amine-bearing coating Synergic modification Biomolecule grafting Nitric oxide loading