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A viable approach to repair neutron shielding B_(4)C/6061 Al composite sheets through cold spray and hot rolling co-treatment

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Journal of materials science & technology 2022年第11期106卷 173-182页

作者： Xiang Qiu Lu Qi Jun-rong Tang Naeem ul Haq Tariq Ji-qiang Wang Tian-ying Xiong Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Science Center for Material Creation and Energy Conversion Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Department of Metallurgy and Materials Engineering Pakistan Institute of Engineering and Applied SciencesNiloreIslamabadPakistan

Cold spray(CS) is considered as a new type of repairing technique for restoration or remanufacturing of a wide range of unserviceable engineering components due to its unique ‘cold’ characteristic. In this work, a viable repairing approach i.e. "cold spraying followed by hot rolling post-treatment" was successfully applied to restore defective neutron shielding B_(4)C/6061 Al composite plates. Scanning electron microscopy(SEM) and electron backscatter diffraction(EBSD) results revealed that the coating-substrate interface is in a good bonding state without micro-cracks. Hot rolling post-treatment resulted in improved microstructure of the as-sprayed deposit with more uniform distribution of B_(4)C particles in the ***, well bonded splat boundaries and strain free Al grains were evolved in the matrix due to enhanced splat deformation and continuous dynamic recrystallization(CDRX). Three-point bending test results revealed that the strength of the repaired material is at par with the in-service plates. The findings of this work could be considered as a great stride to further extend possible applications of CS for repairing engineering structural components.

关键词： B_(4)C/6061 Al Cold spray Repairing Three-point bending test

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Recent advances and perspectives of metal/covalent-organic frameworks in metal-air batteries

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Journal of Energy Chemistry 2021年第12期30卷 113-129,I0003页

作者： Ming Zhong Ming Liu Na Li Xian-He Bu School of Materials Science and Engineering Tianjin Key Laboratory of Metal and Molecule-Based Material ChemistryNankai UniversityTianjin 300350China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050GansuChina College of Chemistry Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)Nankai UniversityTianjin 300071China

Metal-air batteries(MABs)have attracted considerable attention as a novel energy technology that can alleviate the severe energy crisis and environmental *** primary processes,including oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)occur on the air cathode and dominate the battery performance during battery charging and ***,metal-organic frameworks(MOFs)and covalent-organic frameworks(COFs)emerge as promising cathode catalysts due to their structure and composition *** unique characteristics of MOFs and COFs contribute to improved *** review mainly summarizes the recent applications of MOFs and COFs in a series of MABs,mainly including lithium-and zinc-air ***,some critical issues are emphasized regarding MOFs and COFs used in other MABs limited progress,their fabrication and alternatives to potential problems.

关键词： Metal-organic frameworks Covalent-organic frameworks Li-air batteries Zn-air batteries Active sites

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A Sandwich-Like Intelligent Label Via Top-Down Method to Track the Quality of Fish and Yogurt

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SSRN 2024年

作者： Cheng, Xiling Yun, Yalu Ning, Yuping Xu, Jin Li, Jian Wang, Lijuan Key Laboratory of Bio-based Materials Science and Technology Ministry of Education Northeast Forestry University No. 26 Hexing Road Xiangfang District Harbin150040 China

In this work, an intelligent label with sandwich structure was fabricated through a top-down approach, in which the decolored maple veneer directly absorbed bromcresol green (BCG) through Van der Waalś forces and hydrogen bonds, and cationic guar gum (CGG) layer was coated to prevented foods from being contaminated. When the bleaching time was 4 h, the carboxyl content of the veneer increased to 0.20 mmol/g, while the adsorption capacity of BCG decreased to 15.81 mg/g, which displayed a rapid and sensitive response to pH. In 95% alcohol solutions, the release rate of BCG was only 1.47%. When the label color varied from yellow to green, the TVB-N value reached 19.170 mg/100 g closer to the Chinese standard threshold of 20 mg/100 g, providing timely freshness information for consumers. The color changed from blue to green when the acidity of fermented milk rose to 69.892 °T (70 °T is the threshold). © 2024, The Authors. All rights reserved.

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Fabricating an Antioxidant and Bacteriostatic Soy Protein Isolate Film Double-Crosslinked Via Dialdehyde Cellulose Nanofibers and Tara Tannins for Beef Tallow and Cooked Pork Preservation

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SSRN 2024年

作者： Ren, Zihao Ning, Yuping Xu, Jin Cheng, Xiling Xu, Shiyu Wang, Lijuan Key Laboratory of Bio-based Materials Science and Technology Ministry of Education Northeast Forestry University No. 26 Hexing Road Xiangfang District Harbin150040 China

Although Tara tannins (TT) have given soy protein isolate (SPI) film antioxidant properties, the mechanical and barrier properties were not significantly improved. In this work, dialdehyde cellulose nanofibers (DACNF) were obtained through oxidation using sodium periodate and incorporated into SPI film with TT to obtain antioxidant and bacteriostatic properties. With increased DACNF content, the anti-swelling, mechanical and barrier properties of SPI film were enhanced due to a double-crosslinked structure based on covalent and hydrogen bonds of DACNF and TT with SPI. Notably, SPI film with 10% DACNF and 8% TT showed 40.22% DPPH scavenging and 47.37% and 93.8% inhibition of E. coli and S. aureus, respectively. In packaging applications, peroxide value of beef tallow and total viable count of cooked pork packaged with 10DTSPI reached 0 g/100g and 2.26 Log CFU/g, respectively, both of which were lower than those with SPI film. So, this work provided a bio-film with both antioxidant and antibacterial properties to be promising in packaging oily foods and meat products. © 2024, The Authors. All rights reserved.

关键词： Hydrogen bonds

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Hot-Pressing-Assisted Fabrication of High-Lignin-Content and Self-Crosslinked Strong Adhesives

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SSRN 2025年

作者： Yan, Li Liu, Haibo Wang, Ruonan Dai, Lin Yuan, Zhanhui Si, Chuanling College of Materials Engineering Fujian Agriculture and Forestry University Fuzhou350002 China State Key Laboratory of Bio-based Fiber Materials Tianjin Key Laboratory of Pulp and Paper Tianjin University of Science and Technology Tianjin300457 China

Lignin, a natural adhesive, provides sufficient mechanical properties for cell walls, inspiring its application in the field of wood adhesives. However, the majority of industrial lignin-derived adhesives necessitate the incorporation of copious quantities of crosslinking agents to guarantee their optimal mechanical properties. Nevertheless, this approach often gives rise to inherent limitations, including a deficiency in lignin content, environmental issues, and a complex reaction process that significantly impedes their green and large-scale applications. Here, a simple hot-pressing-assisted method was devised for the fabrication of a lignin-based adhesive (LGD). The LGD with an ultra-high lignin content of up to 86 wt% was synthesized from industrial alkali lignin by adding only a small amount of glycol diglycidyl ether (14%) and a simple hot-pressing process. The LGD exhibited an exceptional bonding effect, with an adhesive strength of up to 8.98 MPa (three-layer plywood) and a modulus of rupture of 64.6 MPa (seven-layer plywood). This work not only provides a green raw material and application strategy for the adhesive industry, but also paves the way towards the high-value utilization and large-scale applications of lignin polymeric materials. © 2025, The Authors. All rights reserved.

关键词： Plywood

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Constructing Oxygen Vacancy-Regulated Cu/Fe2o3 Nanorod Array Electrodes for Boosting the Electrocatalytic Reduction of Nitrate

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SSRN 2024年

作者： Yang, Ziyi Li, Yudong Liu, Dan Song, Maosen Gao, Yang Yang, Bin He, Yanzhen Han, Enshan Yang, Xiaohui School of Chemical Engineering Hebei University of Technology Tianjin300400 China Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Heilongjiang Harbin150040 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing400714 China

The adsorption of nitrate is the key to enhancing the electrocatalytic nitrate reduction reaction (NitRR). Constructing oxygen vacancies (OVs) has been an effective strategy that can modulate the local electronic structure and enhance the adsorption of nitrate. However, the existing methods for effectively regulating the concentration of oxygen vacancies are still limited. Herein, based on a detailed understanding of the NitRR mechanism, a typical hydrolysis-coupling redox (HCR) reaction has been designed to prepare unique 3D Cu/Fe2O3 core-shell nanorod array cathodes with controllable oxygen vacancy concentration. The optimal Cu/Fe2O3-13 achieves a high nitrate conversion of 99.10 % and ammonia selectivity of 98.30 % in a 0.2 M Na2SO4 solution with 100 ppm -N at -1.4 V vs. SCE. Furthermore, the Cu/Fe2O3-13 exhibits exceptional stability throughout a 30-hour electrocatalytic process. The outstanding electrochemical performance is attributed to the enhancement mechanism of OVs and a unique nanorod array structure with a high density of surface-exposed OVs and high-throughput transport pathways for ions-aspects. © 2024, The Authors. All rights reserved.

关键词： Electrocatalysis

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Recent progress on surface chemistryⅠ:Assembly and reaction

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Chinese Chemical Letters 2024年第12期35卷 43-94页

作者： Xin Li Zhen Xu Donglei Bu Jinming Cai Huamei Chen Qi Chen Ting Chen Fang Cheng Lifeng Chi Wenjie Dong Zhenchao Dong Shixuan Du Qitang Fan Xing Fan Qiang Fu Song Gao Jing Guo Weijun Guo Yang He Shimin Hou Ying Jiang Huihui Kong Baojun Li Dengyuan Li Jie Li Qing Li Ruoning Li Shuying Li Yuxuan Lin Mengxi Liu Peinian Liu Yanyan Liu Jingtao Lü Chuanxu Ma Haoyang Pan JinLiang Pan Minghu Pan Xiaohui Qiu Ziyong Shen Shijing Tan Bing Wang Dong Wang Li Wang Lili Wang Tao Wang Xiang Wang Xingyue Wang Xueyan Wang Yansong Wang Yu Wang Kai Wu Wei Xu Na Xue Linghao Yan Fan Yang Zhiyong Yang Chi Zhang Xue Zhang Yang Zhang Yao Zhang Xiong Zhou Junfa Zhu Yajie Zhang Feixue Gao Yongfeng Wang Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices School of ElectronicsPeking UniversityBeijing 100871China Spin-X Institute School of MicroelectronicsSouth China University of TechnologyGuangzhou 511442China School of Materials and Energy Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage DevicesGuangdong University of TechnologyGuangzhou 510006China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093 China i-Lab CAS Key Laboratory of Nanophotonic Materials and DevicesSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced MaterialsJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts and TelecommunicationsNanjing 210023China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Institute of Physics&University of Chinese Academy of Sciences Beijing 100190China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemistry Beijing Normal UniversityBeijing 100875China Beijing National Laboratory for Molecular Sciences(BNLMS) College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China School

Surface chemistry focuses on the investigation of the adsorption,migration,assembly,activation,reaction,and desorption of atoms and molecules at *** chemistry plays the pivotal roles in both fundamental science and applied *** review will summarize the recent progresses on surface assembly,synthesis and catalysis investigated mainly by scanning tunneling microscopy and atomic force *** assemblies of water and small biomolecules,construction of Sierpin′ski triangles and surface chirality are ***-surface synthesis of conjugated carbo-and heterocycles and other kinds of carbon nanostructures are *** model catalysis,including single-atom catalysis and electrochemical catalysis,are discussed at the single-atom level.

关键词： Surface chemistry Assembly Surface synthesis Catalysis on surface Surface electrochemical processes

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Reprogramming the metabolism of Synechocystis PCC 6803 by regulating the plastoquinone biosynthesis

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Synthetic and Systems biotechnology 2021年第4期6卷 351-359页

作者： Jianhua Fan Dongqing Zhou Cheng Chen Ju Wu Hui Wu State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai200237PR China Department of Applied Biology East China University of Science and TechnologyShanghai200237PR China Shanghai Collaborative Innovation Center for Biomanufacturing Technology 130 Meilong RoadShanghai200237China Key Laboratory of Bio-based Material Engineering of China National Light Industry Council 130 Meilong RoadShanghai200237China

Cyanobacteria can utilize CO2 or even N2 to produce a variety of high value-added products ***(PQ)is an important electron carrier in both of the photosynthetic and respiratory electron transport *** the content of PQ,as well as their redox state,have an important effect on physiology and metabolism,there are relatively few studies on the synthesis of PQ and its related metabolic regulation mechanism in photosynthetic *** this study,the strategies of overexpression of Geranyl diphosphate:4-hydroxybenzoate geranyltransferase(lepgt)and addition of 4-hydroxybenzoate(4-HB)as the quinone ring precursor were adopted to regulate the biosynthesis of PQ in Synechocystis PCC *** with the analysis the photosystem activity,respiration rate and metabolic components,we found the changes of intracellular PQ reprogrammed the metabolism of Synechocystis PCC *** results showed that the overexpression of lepgt reduced PQ content dramatically,by 22.18%.Interestingly,both of the photosynthesis and respiration rate were *** addition,the intracellular lipid and protein contents were significantly ***,the addition of low concentrations of 4-HB enhanced the biosynthesis of PQ,and the intracellular PQ contents were increased by 14.76%-70.86%in different *** of 4-HB can regulate the photosystem efficiency and respiration and reprogram the metabolism of Synechocystis PCC 6803 *** a word,regulating the PQ biosynthesis provided a novel idea for promoting the reprogramming the physiology and metabolism of Synechocystis.

关键词： Cyanobacteria Plastoquinone LePGT 4-HB Metabolic rewiring

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Citric Acid/Chitosan Adhesive with Viscosity-Controlled for Wood Bonding Through Supramolecular Self-Assembly

SSRN

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SSRN 2023年

作者： Cai, Lijian Chen, Yutong Lu, Zetan Wei, Ming Zhao, Xin Xie, Yanjun Li, Jian Xiao, Shaoliang Key Laboratory of Bio-based Material Science & Technology Ministry of Education Northeast Forestry University Harbin China Engineering Research Center of Advanced Wooden Materials Ministry of Education Northeast Forestry University Harbin China

Developing bio-based sustainable wood adhesives is significant as a substitute for petroleum-derived adhesives. However, the existing bio-based adhesives have disadvantages of complex fabrication, uncontrollable viscosity, and poor water resistance. Herein, we developed a citric acid/chitosan adhesive with viscosity-controlled and water-resistant features by one-step dissolution at room temperature based on the supramolecular self-assembly strategy. Different wood products (plywood, laminated veneer lumber and particleboard) with superior performance were prepared by applying that adhesive on veneer and wood particles (fine particles and rough particles). The adhesion mechanism was mechanical interlocks and cross-linking of citric acid/chitosan in adhesives with those in the cell wall. This work provides high promise for alternatives to traditional unsustainable wood adhesives (urea-formaldehyde, melamine-urea-formaldehyde and phenolic resins) for fabricating different wood products. © 2023, The Authors. All rights reserved.

关键词： Adhesives

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Construction of Moiré-Like Tio2/Polypyrrole Electrodes for High Performance Photo-Assisted Supercapacitors

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SSRN 2024年

作者： Cai, Hanwen Li, Yudong Liu, Dan Yang, Xiaohui Zhou, Desheng Han, Enshan Li, Xinhao Li, Qingyue He, Yanzhen School of Chemical Engineering and Technology Hebei University of Technology Tianjin300130 China Hebei Key Laboratory of Functional Polymers Tianjin300130 China Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Harbin150040 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing400714 China School of Energy Science and Engineering Harbin Institute of Technology Harbin150001 China

There is currently a need for research into using external energy to increase the performance of the supercapacitor in energy storage systems because of their poor energy density. This paper reports the effective creation of photo-assisted supercapacitors with moiré-like morphology using polypyrrole (PPy) and titanium dioxide nano powder to replicate the surface of inexpensive and widely available CD discs. The composite material combines the moiré-like superstructure's strong light trapping property with titanium dioxide's high photo-sensitivity, achieving the aims of boosting light absorption, extending the optical route, and improving capacitor performance under light. By combining morphology construction and external energy interventions to improve capacitor performance, the specific capacitance under light is 509.0 F g-1 at 1 A g-1, 13.1% higher than the same material without moiré-like morphology (449.9 F g-1). When assemble into a sandwich-structured symmetric supercapacitor, it has an area specific capacitance of 99.42 mF cm-2 and an energy density of 7.28 Wh kg-1 at a power density of 217.4 W kg-1, outperforming typical photo-assisted supercapacitors. The current work suggests a practical and straightforward method for increasing the light absorption efficiency and performance of photo-assisted supercapacitors. © 2024, The Authors. All rights reserved.

关键词： Morphology

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