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3D-bioprinted vascular scaffold with tunable mechanical properties for simulating and promoting neo-vascularization

Smart Materials in Medicine 2022年 3卷 199-208页

作者： Zhou, Xin Gao, Qiang Yu, Dan Shao, Yichun Wang, Zhaohui Liu, Xiao Wang, Wenwu Chang, Likun Ma, Tianxiang Mok, Hsiaopei Cen, Jianzheng Chen, Jimei Tahchi, Mario El Zhuang, Jian Mou, Fangzhi Zhang, Jin Yin, Yixia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Cardiac Surgery Guangdong Cardiovascular Institute Guangdong Provincial People's Hospital Guangdong Academy of Medical Sciences Guangzhou510100 China Key Laboratory for Biomechanics and Mechanobiology of the Ministry of Education Beijing Advanced Innovation Centre for Biomedical Engineering School of Biological Science and Medical Engineering Beihang University Beijing100083 China LBMI Department of Physics Faculty of Sciences 2 Lebanese University P.O. Box 90656 Jdeidet Lebanon Qingyuan Innovation Laboratory College of Chemical Engineering Fuzhou University 2 Xueyuan Road Fuzhou350108 China

Alternative artificial vessels with tissue-matching mechanical and biological performance have been continuously taking great attention in bioengineering. However, it is challenging to take into account both mechanical and biological properties in formulating a hydrogel material. In the current study, a composite hydrogel ink based on geltain-methacryloyl (GelMA) and sodium alginate (SA) was prepared by a two-step polymerization process, and its fast shaping was realized by stabilizing the alginate fraction in calcium ion bath as well as the photo-crosslinking of GelMA. Mechanical properties of the transparent 3D printing GelMA/Gelatin/SA blood vessels were determined by testing their stretching and resilience performance. Based on Von Mise stress simulation using Ansys, strain of the artificial blood vessels reached 147% and the elastic Young's modulus reached approximately 224 kPa in the optimal hydrogel formulation, matching well with capability of enduring certain blood pressure encountered in real tissue. A selective and uniform permeability of hydrogel tubes was presented by using small molecules and human red blood cells, meanwhile excellent hemolysis, cell viability, and proliferation ability were also verified. Based on the results of in vitro assessment and the in vivo transplantation in SD rats, our proposed GelMA/Gelatin/SA vessels, with tissue-matching mechanical properties and their ideal biodegradation behavior, promoted neo-vascularization capacity and showed promising potential in producing an artificial blood vessel. © 2022 The Authors

关键词： Blood

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New Insights into the Microstructure and Tribological Behaviors of the Boronized Layer on Inconel 718 Alloy Surface

SSRN

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SSRN 2024年

作者： Wu, Zhenjiang Chen, Shuqun Shao, Mengxue Liu, Yue Li, Yangzhong Peng, Jian Li, Hongyi Wang, Jinshu Key Laboratory of Advanced Functional Materials Education Ministry of China College of Materials and Engineering Beijing University of Technology Beijing100124 China Beijing University of Technology China High Performance Computing Department National Supercomputing Center in Shenzhen Guangdong Shenzhen518055 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Boronizing of nickel based superalloys is of great interests in aerospace industry due to the excellent wear resistance, however, little information has been known on its phase formation and load-dependent wear mechanism. In this work, high quality boronized layer was developed on the Inconel 718 alloy by powder pack-boriding process at 850 °C for 6 h under argon atmosphere. The microstructure characteristics and load-dependent tribological behaviors of the boronized layers were systematically investigate. It is found that the main boronized layer on Inconel 718 alloy consists of a ~11.3 um thick compound layer with nanocrystalline (Ni,Fe)23B6 and (Cr,Fe)B grains, and a ~10.9 um thick diffusion layer with dendritic Cr2B precipitation within the matrix. The phase evolution of the boronizing layer are explainable by thermodynamic modeling of Ni-Cr-B system and the phase stability for metastable Ni-B compounds is confirmed by DFT simulation. Due to the good interfacial bonding strength and high microhardness value, the boronized layer displays excellent wear resistance against Si3N4 ceramic balls at room temperature. In particular, the wear rates of the specimens under applied loads of 10-20 N are higher than those in the 50-100 N loads case. The latter is mainly facilitated by the formation of lubricating boron oxide tribolayer on friction ball surface. We believe the findings in present work will contribute to a deeper understanding of the boronizing treatment in nickel-based superalloys. © 2024, The Authors. All rights reserved.

关键词： Wear resistance

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Chemical adsorption on 2D dielectric nanosheets for matrix free nanocomposites with ultrahigh electrical energy storage

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Science Bulletin 2022年第6期67卷 609-618,M0004页

作者： Jie Chen Zhonghui Shen Qi Kang Xiaoshi Qian Shengtao Li Pingkai Jiang Xingyi Huang Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing Department of Polymer Science and EngineeringThe State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'an 710054China

Relaxor ferroelectric polymers display great potential in capacitor dielectric applications because of their excellent flexibility,light weight,and high dielectric ***,their electrical energy storage capacity is limited by their high conduction losses and low dielectric strength,which primarily originates from the impact-ionization-induced electron multiplication,low mechanical modulus,and low thermal conductivity of the dielectric *** a matrix free strategy is developed to effectively suppress electron multiplication effects and to enhance mechanical modulus and thermal conductivity of a dielectric polymer,which involves the chemical adsorption of an electron barrier layer on boron nitride nanosheet surfaces by chemically adsorbing an amino-containing polymer.A dramatic decrease of leakage current(from 2.4×10^(-6)to 1.1×10^(-7)A cm^(-2)at 100 MV m^(-1))and a substantial increase of breakdown strength(from 340 to 742 MV m^(-1))were achieved in the nanocompostes,which result in a remarkable increase of discharge energy density(from 5.2 to 31.8 J cm^(-3)).Moreover,the dielectric strength of the nanocomposites suffering an electrical breakdown could be restored to 88%of the original *** study demonstrates a rational design for fabricating dielectric polymer nanocomposites with greatly enhanced electric energy storage capacity.

关键词： Boron nitride nanosheets Electron barrier layer Relaxor ferroelectric polymers Nanocomposites Electrical energy storage

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The Influence of Alkaline Earth Elements on Electronic Properties ofα-Si3N4 via DFT Calculation

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Journal of Wuhan University of technology(Materials Science) 2020年第5期35卷 863-871页

作者： ZHANG Jianwen HUANG Zhifeng YIN Ziqian LI Meijuan CHEN Fei SHEN Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China School of Chemistry Chemical Engineering and Life SciencesWuhan University of TechnologyWuhan430070China

We used density functional theory(DFT)calculations to study the influence of alkali earth metal element(AE)doping on the crystal structure and electronic band structure ofα-*** diversity of atomic radii of alkaline earth metal elements results in structural expansion when they were doped into theα-Si3N4 *** energies of the doped structures indicate that dopants prefer to occupy the interstitial site under the nitrogen-deficient environment,while substitute Si under the nitrogen-rich environment,which provides a guide to synthesizingα-Si3N4 with different doping types by controlling nitrogen *** electronic structures,energy levels of the dopants appear in the bottom of the conduction band or the top of the valence band or the forbidden band,which reduces the bandgap ofα-Si3N4.

关键词： first-principles density functional theory calculations alkaline earth elements dopedα-Si3N4 photoluminescence material crystal structure electronic structure

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Effect of calcination temperatures on photocatalytic H_(2)O_(2)-production activity of ZnO nanorods

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Chinese Journal of Catalysis 2022年第2期43卷 226-233页

作者： Zicong Jiang Yong Zhang Liuyang Zhang Bei Cheng Linxi Wang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200GuangdongChina College of Chemistry and Chemical Engineering Hubei Polytechnic UniversityHuangshi435003HubeiChina Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074HubeiChina

Photocatalytic hydrogen peroxide(H_(2)O_(2))production from O_(2) and H2O is an ideal process for solar‐to‐chemical energy ***,ZnO nanorods are prepared via a simple hydrothermal method for photocatalytic H_(2)O_(2) *** ZnO nanorods exhibit varied performance with different calcination *** from calcination,the separation efficiency of photo‐induced carriers is significantly improved,leading to the superior photocatalytic activity for H_(2)O_(2) *** H_(2)O_(2) produced by ZnO calcined at 300℃ is 285μmol L^(−1),which is over 5 times larger than that produced by untreated *** work provides an insight into photocatalytic H2O2 production mechanism by ZnO nanorods,and presents a promising strategy to H2O2 production.

关键词： Photocatalysis Hydrogen peroxide production ZnO nanorod Calcination temperature Oxygen reduction

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Ionic Liquid-Grafted Mxene Composite Polymer Electrolytes for High-Performance Solid-state Batteries

SSRN

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SSRN 2025年

作者： Li, Yu Qian, Zhi Qiu, Zhao-Dong Wang, Rui-Qing Wei, Mei-Tong Fei, An-Min Hu, Zhi-Yi Mohamed, Hemdan S.H. Chen, Li-Hua Su, Bao-Lian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Wuhan University of Technology Wuhan430070 China Physics Department Faculty of Science Fayoum University El Gomhoria Street Fayoum63514 Egypt University of Namur NamurB-5000 Belgium

All-solid-state batteries (ASSBs) have obtained much attention due to the high energy density and security. At present, PEO-based solid-state batteries are considered to be one of the most promising candidates for high-performance ASSBs due to the excellent processability and good interfacial stability. However, low ionic conductivity and Li+ transference number seriously hinder their progress in practical applications. Here, a novel filler is developed by embedding ionic liquid (IL) grafted onto the surface of MXene to improve the electrochemical performance of PEO-based solid composite polymer electrolyte (MXene-IL-SPE) for ASSBs. The 2D MXene can significantly reduce the crystallinity of PEO, and the presence of IL not only enhances the dispersion of MXene in the polymer matrix, but also promotes the dissociation of lithium salts and anchors anions. As a result, the MXene-IL-SPE possesses high ionic conductivity (7.19 × 10-4 S cm-1) and Li+ transference number (0.51), together with wide electrochemical window (5.2 V) at 60 °C. The assembled LiFePO4|MXene-IL-SPE|Li full cell exhibits remarkable rate capability and exceptional capacity of 154.8 mAh g-1 over 120 cycles with an impressive 95.3% capacity retention at 0.5 C. This design opens up a new way to prepare high performance CPEs for ASSBs. © 2025, The Authors. All rights reserved.

关键词： Solid-state Batteries

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Stable perovskite solar cells with efficiency of 22.6%via quinoxaline-based polymeric hole transport material

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Science China Chemistry 2021年第11期64卷 2035-2044页

作者： Chenxing Lu Can Zhu Lei Meng Chenkai Sun Wenbin Lai Shucheng Qin Jinyuan Zhang Wenchao Huang Jiaqi Du Yiyang Wang Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing100190China School of Chemical Science University of Chinese Academy of SciencesBeijing100049China College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou450001China Department of Materials Science and Engineering Monash UniversityClaytonVIC3168Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan528216China Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China

Poor stability of spiro-OMe TAD hole transport materials(HTMs)with dopant is a major obstacle for the commercialization of perovskite solar cells(pero-SCs).Herein,we demonstrate a series of quinoxaline-based D-A copolymers PBQ5,PBQ6 and PBQ10 as the dopant-free polymer HTMs for high performance *** D-A copolymers are composed of fluorothienyl benzodithiophene(BDTT)as D-unit,difluoroquinoxaline(DFQ)with different side chains as A-unit,and thiophene asπ-bridge,where the side chains on the DFQ unit are bi-alkyl for PBQ5,bi-alkyl-fluorothienyl for PBQ6,and alkoxyl for *** the three copolymers are adopted as the dopant-free HTM in the *** planar n-i-p structured pero-SCs based on(FAPb I_(3))_(0.98)(MAPb Br_(3))_(0.02)with PBQ6 HTM demonstrated the high power conversion efficiency(PCE)of 22.6%with Vocof1.13 V and FF of 80.8%,which is benefitted from the suitable energy level and high hole mobility of *** PCE of 22.6%is the highest efficiency reported in the n-i-p structured pero-SCs based on dopant-free D-A copolymer *** addition,the peroSCs show significantly enhanced ambient,thermal and light-soaking stability compared with the devices with traditional spiroOMe TAD HTM.

关键词： perovskite solar cells hole transport materials D-A copolymer difluoroquinoxaline stability

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Recent advances in materials and device technologies for aqueous hybrid supercapacitors

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Science China Materials 2022年第1期65卷 10-31页

作者： Qiuyue Gui Deliang Ba Linpo Li Wenyi Liu Yuanyuan Li Jinping Liu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China State Center for International Cooperation on Designer Low-carbon&Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China

Aqueous hybrid supercapacitors(AHSCs)offer potential safety and eco-friendliness compared with conventional electrochemical energy storage devices that use toxic and flammable organic *** can serve as the bridge between aqueous batteries and aqueous supercapacitors by combining the advantages of high energy of the battery electrode and high power as well as long lifespan of the capacitive *** the past few decades,extensive research efforts have been devoted to developing advanced materials and fascinating device architectures for ***,further development related to the compatibilities between the battery-type electrode and capacitive electrode remains stagnant mainly due to discrepancy encountered in terms of reaction kinetics and *** review focuses on the recent progress made in the field of AHSCs via elucidating the main concepts on the design of battery and capacitive electrodes and emerging *** particular,ingenious AHSCs that possess either better flexibility toward materials selection or better device functionality such as those with“dual-ion”energy storage mechanism and non-polarity feature are also *** advances and unresolved issues in multivalent ion hybrid devices(in particular,zinc-ion AHSCs)are further ***,future research directions and challenges for AHSCs are presented,which are anticipated to deliver higher energy and demonstrate greater multifunctionalities for more breakthrough technology applications.

关键词： aqueous hybrid supercapacitors electrode materials electrolytes device technologies

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Voltage Prediction and Extrapolation in Complex Pem Fuel Cell Conditions Via Transfer Learning from Localized Data

SSRN

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SSRN 2024年

作者： Zhu, Wenchao He, Tingwei Wu, Hangyu Yang, Yang Wei, Peng Xie, Changjun Xiong, Rui State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Automation Wuhan University of Technology Wuhan430070 China Wuhan Industrial Technology Institute of Artificial Intelligence and New Energy Vehicles Wuhan430119 China Joint Laboratory for Advanced Energy Storage and Application School of Mechanical Engineering Beijing Institute of Technology Beijing100081 China

Transfer learning effectively leverages knowledge from source tasks to mitigate the reliance on large datasets in data-driven fuel cell health state prediction methods. However, in practical applications, the significant variation in degradation data distribution across different fuel cell types and operating conditions hinders knowledge transfer between source and target domains. Moreover, the complex and variable operating conditions of PEMFCs pose additional challenges to accurate prediction and diagnosis. Accurately characterizing future fuel cell stacks degradation characteristics under complex conditions using limited data from specific operating conditions is crucial for effective fuel cell health monitoring. A TCN-GRU-based transfer learning architecture is proposed to enable the transfer of knowledge from quasi-dynamic data to dynamic conditions. This approach reduces time costs by 41.56% and increases accuracy by 48.29%. Its generalization capability is thoroughly demonstrated across nine current levels in the activation and ohmic regions. Additionally, a voltage extrapolation method using Deep MMD is proposed. Based on limited data from specific operating conditions in the activation and ohmic regions, the proposed transfer learning method reconstructs voltage for future potential operating conditions, enabling precise characterization of fuel cell voltage degradation trends under unknown conditions, providing comprehensive insights for fuel cell operation. © 2024, The Authors. All rights reserved.

关键词： Extrapolation

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Discovering the Role of Moisture in Spray-Coating High-Quality Perovskite Films Under Ambient Conditions

SSRN

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SSRN 2023年

作者： Yu, Xinxin Mo, Yanping Li, Jing Ku, Zhiliang Xiao, Junyan Long, Fei Han, Liyuan Peng, Yong Cheng, Yi-Bing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China College of Materials Science and Engineering Guilin University of Technology Guangxi Guilin541004 China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University Shanghai200240 China

The effect of moisture on the crystallization and morphological control of spray-prepared Cs0.19FA0.81PbI2.5Br0.5 perovskite films is elucidated. Moisture in air functions to (1) enhance droplet spreading as a result of humidity-suppressed solvent evaporation;(2) solvate organic salts in conjunction with added water in the precursor solution to facilitate the penetration of organic salts into inorganic halide films and accelerate their interaction. These conjunct contributions, on the one hand, relieve inhomogeneous solute distribution and suppress the "coffee-ring effect", on the other hand, promote phase transition and improve the crystallinity of resultant perovskite, ultimately enabling the formation of high-quality Cs0.19FA0.81PbI2.5Br0.5 perovskite films with homogeneous morphology and good crystallization. The power conversion efficiency (PCE) of the champion perovskite solar cell increases from 18.25% to 19.74%, with improved thermal stability, maintaining 80% of its initial efficiency after operating at 50 °C for >800 h. The large-area perovskite film (10 × 10 cm2) exhibits significant uniformity over the entire film, and the corresponding devices exhibit high consistency and reproducibility. The average PCE of small-area devices employing the same large-area perovskite film is 19.53±0.25%. Mini-modules with an active area of 64.8 cm2 yield an optimal PCE of 16.75%, with an average PCE of 16.08±0.32%. © 2023, The Authors. All rights reserved.

关键词： Perovskite solar cells

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