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Journal of Central South University 2008年第S1期15卷 107-110页

作者：曹杰车玉菊曹绪龙张继超王洪艳谭业邦 School of Chemistry and chemical engineering Shandong University Research institute of Geology Shengli Oilfield Company

Poly(acrylamide-co-sodium acrylate)(PAM/AA-Na) and poly(acrylamide-co-sodium vinylsulfonate)(PAM/VSS-Na) were prepared by inverse emulsion *** effects of CaCl2 on PAM/VSS-Na or PAM/VSS-Na aqueous solutions were investigated by steady-flow experiments at 25,40,55 and 70 ℃.The results show that the apparent viscosities of both solutions decrease with addition of CaCl2 or increase of temperature and shear ***/VSS-Na solution has better performance on the salt tolerance,shear endurance and temperature resistance due to containing sulfonic group in the ***2+ concentration can affect the viscous activation energy of both solutions and the reason may be that these interactions between Ca2+ and also copolymer molecules are related to temperature and competitive in *** results may offer the basic data for searching the flooding systems with the ability of temperature resistance,salt tolerance and shear endurance for tertiary oil recovery.

关键词： polyacrylamide sodium vinylsulfonate rheological properties salt tolerant temperature resistant

Achieving ultra-stable and superior electricity generation by integrating transistor-like design with lubricant armor

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The Innovation 2022年第5期3卷 122-128页

作者： Yuxin Song Wanghuai Xu Yuan Liu Huanxi Zheng Miaomiao Cui Yongsen Zhou Baoping Zhang Xiantong Yan Lili Wang Pengyu Li Xiaote Xu Zhengbao Yang Zuankai Wang Department of Mechanical engineering City University of Hong KongHong Kong 999077China Research Center for Nature-Inspired engineering City University of Hong KongHong Kong 999077China Shenzhen Research institute of city University of Hong Kong Shenzhen 518057China School of chemical engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

Extensive work have been done to harvest untapped water energy in formats of raindrops,flows,waves,and ***,attaining stable and efficient electricity generation from these low-frequency water kinetic energies at both individual device and large-scale system level remains challenging,partially owing to the difficulty in designing a unit that possesses stable liquid and charge transfer properties,and also can be seamlessly integrated to achieve preferential collective performances without the introduction of tortuous wiring and redundant node connection with external ***,we report the design of water electricity generators featuring the combination of lubricant layer and transistor-like electrode architecture that endows enhanced electrical performances in different working *** a design is scalable in manufacturing and suitable for facile integration,characterized by significant reduction in the numbers of wiring and nodes and elimination of complex interfacing problems,and represents a significant step toward large-scale,real-life applications.

关键词： integrating collective electricity

Alliance of atomic-scale/nanoscale Fe/Co active sites with hierarchically porous N-doped carbon frameworks for efficient electrocatalytic oxygen reduction

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Rare Metals 2023年第11期42卷 3766-3779页

作者： Hai-Hua Yang Xiao-Rong Qian Na Zhang Xia-Ting Jia Zhi-Yan Wen Xiao-Bo Chen Min-Jie Zhou Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials Hunan Institute of Science and TechnologyYueyang414006China School of Chemistry and chemical engineering Hunan Institute of Science and TechnologyYueyang414006China School of Physics and Electronic Science Hunan Institute of Science and TechnologyYueyang414006China Department of Chemistry University of Missouri-Kansas CityKansas City64111USA

Ingenious establishment of transition metal-nitrogen-carbon electrocatalysts with diverse catalytic active sites and hierarchically porous frameworks is highly significant to boost the oxygen reduction reaction(ORR)in Zn-air batteries(ZABs).In this study,Fe/Co co-doped zeolitic imidazolium frameworks(ZIFs)and graphitic carbon nitride(g-C_(3)N_(4))were integrated and pyrolyzed to construct carbon-based electrocatalysts containing Fe,Co and N elements(labelled as Co-CoFe@NRPC),in which atomic-sc ale FeN_x and CoN_x,and nano scale metallic Co and CoFe alloy moieties were aligned with hierarchically porous N-doped carbon frameworks constructed by interconnected micropolyhedrons,nano tubes and *** diverse active moieties guaranteed excellent intrinsic catalytic activity,while the hierarchically porous N-doped carbon frameworks ensured admirable accessibility of the catalytic active sites,excellent electrical conductivity,satisfactory mass transport and good ***,the optimized Co-CoFe@NRPC-90(with 90 mg g-C_(3)N_(4) added)electrocatalyst exhibited excellent ORR performance with a high half-wave potential of 885 mV(*** hydrogen electrode(RHE)),diffusion-limiting current density of 6.15 mA·cm^(-2),desirable durability and methanol ***,the liquid ZAB established with Co-CoFe@NRPC-90 as an air-cathode electrocatalyst manifested an outstanding power density(281 mW·cm^(-2))and specific capacity(820.9 mAh·g_(Zn)^(-1)),transcending the liquid ZAB based on a commercial Pt/C electrocatalyst.

关键词： Fe/Co co-doped zeolitic imidazolium frameworks Graphitic carbon nitride Transition metal-nitrogen-carbon electrocatalyst Oxygen reduction reaction(ORR)

Research on corrosion mechanism of water distribution system

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Journal of Harbin institute of Technology(New Series) 2011年第1期18卷 121-125页

作者：张新瑜李欣覃吴徐雯雯袁一星 School of Municipal and Environmental engineering Harbin Institute of Technology School of Civil engineering and Architecture University of Jinan School of chemical engineering & Technology Harbin Institute of Technology

Pipes serving for water distribution system for different years in northern city,were chosen as objectives for *** shape and component of corrosion scales were measured,and formation mechanism of corrosion was also *** corrosion mechanism of pipes was studied on the sides of electrochemistry and *** solution to eliminate corrosion scales in water distribution system was also *** results show that the specific surface areas of five corrosion scales are between 41.35 and 132.3 m2/g and the dimension of corrosion scales enlarge with the increase of serving age,which could induce the decrease of water flow cross-section.

关键词： corrosion water distribution system water quality

Putative functions of EpsK in teichuronic acid synthesis and phosphate starvation in Bacillus licheniformis

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Synthetic and Systems Biotechnology 2022年第2期7卷 815-823页

作者： Yiyuan Xu Lijie Yang Haiyan Wang Xiaoyu Wei Yanyan Shi Dafeng Liang Mingfeng Cao Ning He Department of chemical and Biochemical engineering College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005PR China The Key Lab for Synthetic Biotechnology of Xiamen city Xiamen UniversityXiamen361005PR China institute of Bioengineering Guangdong Academy of SciencesGuangzhou510316GuangdongPR China

Extracellular polymeric substances(EPSs)are extracellular macromolecules in bacteria,which function in cell growth and show potential for mechanism study and biosynthesis ***,the biosynthesis mechanism of EPS is still not *** herein chose Bacillus licheniformis CGMCC 2876 as a target strain to investigate the EPS ***,a member of eps cluster,the predicted polysaccharide synthesis cluster,was overexpressed and showed that the overexpression of epsK led to a 26.54%decrease in the production of EPS and resulted in slenderer cell *** analysis combined with protein-protein interactions analysis and protein modeling revealed that epsK was likely responsible for the synthesis of teichuronic acid,a substitute cell wall component of teichoic acid when the strain was suffering phosphate *** cell cultivation showed that either phosphate limitation or the overexpression of teichuronic acid synthesis genes,tuaB and tuaE could similarly lead to EPS *** enhanced production of teichuronic acid induced by epsK overexpression triggered the endogenous phosphate starvation,resulting in the decreased EPS synthesis and biomass,and the enhanced bacterial *** study presents an insight into the mechanism of EPS synthesis and offers the potential in controllable synthesis of target products.

关键词： Extracellular polymeric substance(EPS) Polysaccharides Transcriptome Phosphate starvation

Recent advances of transition-metal metaphosphates for efficient electrocatalytic water splitting

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Carbon Energy 2023年第12期5卷 153-174页

作者： Yuanyuan Zhang Jie Wu Bingrong Guo Haohao Huo Siqi Niu Siwei Li Ping Xu School of chemical engineering and Technology Institute of Industrial CatalysisXi'an Jiaotong UniversityXi'anShaanxiChina MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbinHeilongjiangChina Dalian National Laboratory for Clean Energy Division of Energy StorageDalian Institute of Chemical PhysicsChinese Academy of SciencesDalianLiaoningChina

Sustainable production of H2 through electrochemical water splitting is of great importance in the foreseeable ***-metal metaphosphates(TMMPs)have a three-dimensional(3D)open-framework structure and a high content of P(which exists as PO3-),and therefore have been recognized as highly efficient catalysts for oxygen evolution reaction(OER)and the bottleneck of electrochemical water ***,TMMPs can also contribute to hydrogen evolution reaction(HER)in alkaline and neutral media by facilitating water dissociation,and thus,overall water splitting can be achieved using this kind of *** this timely review,we summarize the recent advances in the synthesis of TMMPs and their applications in OER and *** present a brief introduction of the structure and synthetic strategies of TMMPs in the first two ***,we review the latest progress made in research on TMMPs as OER,HER,and overall water-splitting *** this part,the intrinsic activity of TMMPs as well as the current strategy for improving the catalytic activity will be discussed ***,we present the future opportunities and the remaining challenges for the application of TMMPs in the electrocatalysis field.

关键词： electrocatalysis synthetic strategies transition-metal metaphosphates water splitting

Effects of Processing Parameters on Mechanical Properties and Structure of Banana Fiber-Reinforced Composites

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Journal of Renewable Materials 2018年第6期6卷 662-670页

作者： Dan-Thuy Van-Pham Minh Tri Nguyen Chanh-Nghiem Nguyen Thi Truc Duyen Le Thi Yen Nhu Pham Khai Thinh Nguyen Yukihiro Nishikawa Qui Tran-Cong-Miyata Department of chemical engineering Can Tho UniversityCan Tho CityViet Nam Department of Automation Technology Can Tho UniversityCan Tho CityViet Nam Department of Macromolecular Science and engineering Graduate School of Science and TechnologyKyoto Institute of TechnologyMatsugasakiSakyo-kuKyoto 606-8585Japan

The mechanical properties of unidirectional natural fiber-reinforced composites are generally affected by several processing parameters during compression *** study investigates the effects of processing temperature,time,and pressure on the tensile and flexural properties of acrylonitrile butadiene styrene reinforced by banana fibers.X-ray CT imaging was employed to find the relationship between the mechanical properties and structure of the processed ***,the water absorption of composites was observed and the way in which the mechanical properties evolved after water absorption was *** tensile and flexural properties of the unidirectional banana fiber-reinforced composite were found to be inversely proportional to the *** addition,high-pressure compression molding might result in cracks and floating fibers that would significantly reduce its mechanical *** composite with the highest strength,smallest porosity and lowest water absorption was optimally prepared at T=170℃,t=20 min,and P=100 kg cm^-2.

关键词： Banana fiber composite compression molding porosity X-ray CT

Bridgman growth of LiYF_4 single crystal in nonvacuum atmosphere

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Chinese Optics Letters 2010年第11期8卷 1071-1074页

作者：方奇术陈红兵徐方王苏静梁哲蒋成勇 State Key Base of Functional Materials and Its Preparation Science Institute of Materials Science and Chemical EngineeringNingbo University

Using LiF and YF3 as starting materials,we prepare feed material from fluorides according to the molar ratio of LiF：YF3=51.5：*** anhydrous LiYF4 polycrystalline material is synthesized via the fluoridation process with a dried HF flow at elevated *** charging the feed material and adding a small amount of active carbon powder in a sealed platinum crucible,the crystal can be grown via the vertical Bridgman method in a nonvacuum *** is possible because the oxidization and volatilization of the melt is *** optimum conditions,that is,a growth rate of 0.5-0.6 mm/h and a temperature gradient of 25-30℃/cm across the solid-liquid interface under a furnace temperature of 920-930℃,the colorless crystal LiYF 4 with the size of φ25 × 50 （mm） is successfully *** optical transmittance of the crystal is as high as 85% above the absorption edge at 190 *** induced absorption bands are observed below 700 nm in the transmission spectrum after the crystal is subjected to a high dose of γ-ray irradiation.

关键词： Absorption Absorption spectroscopy Fluorine compounds Phase interfaces Platinum Polycrystalline materials Single crystals

Structure and magnetostriction of high Pr/Ce-content(Tb_(0.2)Pr_(0.8))_(1-x)Ce_(x)Fe_(1.93) Laves compounds

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Journal of Rare Earths 2022年第4期40卷 670-675,I0006页

作者： Yihao Shen Jinjun Liu Qilin Ding Mingkun Wang Zhongbin Pan Juan Du Faculty of Materials Science and chemical engineering Ningbo UniversityNingbo 315211China Ningbo institute of Materials Technology and engineering Chinese Academy of SciencesNingbo 315201China

The light rare earth Pr/Ce-contained(Tb_(0.2)Pr_(0.8))_(1–x)Ce_(x)Fe_(1.93)(0≤x≤1.0)intermetallics were arc melted and magnetoelastic properties were *** compounds of x≥0.40 are found to stabilize at ambient pressure in a single Laves phase with MgCu2-type C15 structure,which is attributed to the strong Ce 4f *** mixed-valence behavior,with a support of the deviation from the linear Vegard’s law for both lattice parameter a and saturation magnetization M_(S),is observed at room *** easy magnetization direction(EMD)was determined by the analysis of XRD on both magnetically aligned samples and the(440)splitting,that is,EMD lies towardaxis for x≤0.50 rotating tofor x=0.60,accompanied with the structural distortion from rhombohedral to *** substitution of Ce for Tb/Pr is conductive to the reduction of magnetocrystalline anisotropy,giving rise to an improvement of the low-field *** excellent magnetoelastic properties can be tailored by the Ce introduction,e.g.,the spontaneous magnetostriction coefficient λ_(111) as large as 1150×10^(−6) for x=0.40,and the low-field induced magnetostriction achieving a high value of λ_(a)=180×10^(−6) at 80 kA/m for x=*** excellent magnetoelastic properties and the combination in high Pr-content with low cost,suggest promising prospects in applications.

关键词： Light rare earth Intermetallics Laves phase X-ray diffraction Magnetic properties Magnetostriction

Inhibition of Defect-Induced Ice Nucleation, Propagation, and Adhesion by Bioinspired Self-Healing Anti-Icing Coatings

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Research 2024年第1期2023卷 237-246页

作者： Shu Tian Ruiqi Li Xinmeng Liu Jiancheng Wang Junyu Yu Sijia Xu Yunqing Tian Jing Yang Lei Zhang Department of Biochemical engineering Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(MOE)School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Binzhou institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou CityShandong Province 256606China

Anti-icing coatings on outdoor infrastructures inevitably suffer from mechanical injuries in numerous icing scenarios such as hailstorms,sandstorms,impacts of foreign objects,and icing–deicing ***,the mechanisms of surface-defect-induced icing are *** the defects,water molecules exhibit stronger adsorption and the heat transfer rate increases,accelerating the condensation of water vapor as well as ice nucleation and ***,the ice–defect interlocking structure increases the ice adhesion ***,a self-healing(at−20℃)antifreeze-protein(AFP)-inspired anti-icing coating is *** coating is based on a design that mimics the ice-binding and non-ice-binding sites in *** enables the coating to markedly inhibit ice nucleation(nucleation temperature<−29.4℃),prevent ice propagation(propagation rate<0.00048 cm^(2)/s),and reduce ice adhesion on the surface(adhesion strength<38.9 kPa).More importantly,the coating can also autonomously self-heal at−20℃,as a result of multiple dynamic bonds in its structure,to inhibit defect-induced icing *** healed coating sustains high anti-icing and deicing performance even under various extreme *** work reveals the in-depth mechanism of defect-induced ice formation as well as adhesion,and proposes a self-healing anti-icing coating for outdoor infrastructures.

关键词： coating defect clarified