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Design and Fabrication of Flexible Thermoelectric String-Based Fabrics

Journal of Donghua University(English Edition) 2024年第5期41卷 474-481页

作者： AHMAAD Hasib Ud Din DU Minzhi HAN Xue JING Yuanyuan YANG Xiaona ZHANG Juan CHEN Xinyi SYED Rashedul Islam HUANG Fuli XU Jinchuan ZHANG Kun College of Textiles Donghua UniversityShanghai 201620China Key Laboratory of Textile Science&Technology Ministry of EducationDonghua UniversityShanghai 201620China

Flexible thermoelectric(TE)materials that convert heat into electricity have been widely used in wearable electronics and other flexible *** this work,inorganic TE pillars were combined with thermoplastic polyurethane(TPU)to assemble a flexible string-shaped TE generator(TEG)for the fabrication of the thermoelectric fabric(TEF).Moreover,finite element analysis(FEA)was used to optimize the dimensions of the TE string and evaluate its *** FEA results showed that the inter-pillar spacing significantly affected the temperature difference,the output voltage and the internal resistance.A maximum power density of 3.43μW/cm^(2)(temperate gradientΔT=10.5 K)was achieved by the TE string with a diameter of 3.5 mm and an inter-pillar spacing of 2 ***,under the experimental condition,the achievable power density of the fabricated three-dimensional(3D)TEF was limited to 29%of the simulation result because of the inclination of the TE string within the fabric concerning heat plate contact and copper wire-TE pillar *** actual TE string also demonstrated high flexibility and stable mechanical properties after 450 bending ***,the study would provide a foundation for future research in developing more efficient TEFs to offer a comfortable and conformable option for wearable energy harvesting applications.

关键词： thermoelectric fabric(TEF) thermoelectric(TE)pillar thermoplastic polyurethane(TPU) finite element analysis(FEA)

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Manganese-Catalyzed Phosphinomethylation of Ketones: Diverse Access to γ-Keto and γ-Hydroxy Phosphines

SSRN

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SSRN 2025年

作者： Wang, Siyi Sun, Feixiang Liu, Weiping Key Laboratory of Science and Technology of Eco-Textile Ministry of Education College of Chemistry and Chemical Engineering Donghua University Shanghai China

Using methanol as a C1 source, we report a manganese-catalyzed three-component phosphinomethylation of ketones for the diver-gent synthesis of γ-keto and γ-hydroxy phosphines. This method demonstrates broad compatibility, efficiently coupling β-H-containing ketones, methanol, and various secondary phosphines to afford the corresponding γ-keto and γ-hydroxy phosphines in 56% to 99% yields. Mechanistic studies suggest a sequential pathway involving catalytic dehydrogenation, cross-condensation, and Michael addition to form the γ-keto phosphines, followed by ketone hydrogenation to yield the γ-hydroxy phosphines. © 2025, The Authors. All rights reserved.

关键词： Catalysis

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Electrospinning of Bead-on-String Sodium Alginate Nanofibrous Membrane

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Journal of Donghua University(English Edition) 2022年第2期39卷 95-102页

作者： DENG Linfeng NI Jiaqian HU Xuefeng JING Yuanyuan WANG Jilong LIU Li MA Ying Key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Zhejiang Zhongda Testing Technology Services Co. Ltd.Shaoxing 312030China

Electrospun sodium alginate(SA)fibers,which are always considered as a kind of biocompatible and non-toxic materials,have great potential application in the biomedical field due to high specific surface area and large ***,in order to facilitate the electrospinning process,another polymer should be added into the SA *** effect of the added polymer of polyethylene oxide(PEO),SA,and ethanol on tuning the beaded structure of electrospun fibers was *** SA electrospun membrane with a beaded structure was *** results show that PEO can facilitate the fabrication,but the mass fractions of SA and ethanol are positively correlated with the bead *** the mass fraction of ethanol in the solution was 15.0%(mass fractions of SA and PEO were 1.0%and 1.5%,respectively),the average diameter of the obtained beads was 824.80 nm,and the average length was 2.88μ***,the fibrous structure can be maintained even after the removal of PEO by *** removing PEO,the average diameter of the beads was reduced to 578.73 nm and the average length was reduced to 2.34μm.

关键词： sodium alginate(SA) polyethylene oxide(PEO) electrospinning beaded structure

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Flax/Polylactic Acid(PLA)Core/Sheath Structural Composite Yarn Fabricated by Spindle Braiding Technique

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Journal of Donghua University(English Edition) 2024年第5期41卷 451-460页

作者： ISLAM Md Azizul WANG Ruijie CHEN Wei YANG Chunbing ZHOU Bangze WODAG Awoke Fenta XU Fujun Key Laboratory of Textile Science&Technology Ministry of EducationDonghua UniversityShanghai 201620China College of Textiles Donghua UniversityShanghai 201620China

The increasing demand for sustainable and environmentally friendly materials has driven research towards the development of green *** this work,the flax/polylactic acid(PLA)braided yarns were fabricated by braiding PLA filaments with 4 to 24 spindles on flax *** curing at different temperatures(180℃and 190℃),the core/sheath structural flax/PLA composite yarns were *** to the results of the tensile test,the flax/PLA composite yarn with 4-spindle PLA yarns as a sheath layer and at a curing temperature of 180℃reached the maximum elastic modulus of about(5.79±0.65)GPa and the maximum tensile strength of about(162.17±18.18)*** flax/PLA composite yarn with good mechanical properties would be suitable for green composites in the automobile manufacturing industry and building materials.

关键词： flax polylactic acid(PLA) braiding composite yarn tensile property

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Objective Evaluation of Fabric Flatness Grade Based on Convolutional Neural Network

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Journal of Shanghai Jiaotong university(science) 2021年第4期26卷 503-510页

作者： ZHAN Zhu ZHANG Wenjun CHEN Xia WANG Jun College of Textiles Donghua UniversityShanghai201620China Key Laboratory of Textile Science&Technology of Ministry of Education Donghua UniversityShanghai201620China

As an important indicator for the appearance and intrinsic quality of textiles, fabric flatness is the immediate cause affecting the aesthetic appearance and performance of textiles. In this paper, the objective evaluation system of fabric flatness based on 3D scanner and convolutional neural network (CNN) is constructed by using the height data of AATCC flatness template. The 3D scanner is responsible for the collection of the height value data of the sample. The effect of different sub-sample cutting sizes, cutting offsets, and network model depths on the objective evaluation coincidence rate of multiple flatness level was studied. The experimental results show that the coincidence rate of the system reaches 98.9% when the collected sample data are cut into subsamples of 20 pixel × 20 pixel with 12 pixel cutting offsets and the 11-layer network model is selected. Finally, this scheme is used to evaluate the flatness of four real fabrics with different colors and textures. The result shows that all of the samples can achieve a higher coincidence rate, which further verifies the adaptability and stability of the objective evaluation system constructed in this paper for fabric flatness evaluation.

关键词： fabric flatness convolutional neural network(CNN) computer vision image processing

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Effects of Soil Hydraulic Properties on Soil Moisture Estimation

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Journal of Meteorological Research 2023年第1期37卷 58-74页

作者： Xiaolei FU Haishen LYU Zhongbo YU Xiaolei JIANG Yongjian DING Donghai ZHENG Jinbai HUANG Hongyuan FANG College of Hydraulic Science and Engineering Yangzhou UniversityYangzhou 225009 Key Laboratory of Hydrometeorological Disaster Mechanism and Warning of Ministry of Water Resources Nanjing University of Information Science&TechnologyNanjing 210044 State Key Laboratory of Hydrology–Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098 Joint International Research Laboratory of Global Change and Water Cycle Hohai UniversityNanjing 210098 Yangtze Institute for Conservation and Development Hohai UniversityNanjing210098 State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000 Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100101

Accurate quantification of soil moisture is essential to understand the land surface *** hydraulic properties influence water transport in soil and thus affect the estimation of soil ***,some soil hydraulic properties are only observable at a few field *** this study,the effects of soil hydraulic properties on soil moisture estimation are investigated by using the one-dimensional(1-D)Richards equation at ELBARA,which is part of the Maqu monitoring network over the Tibetan Plateau(TP),*** moisture assimilation experiments are then conducted with the unscented weighted ensemble Kalman filter(UWEnKF).The results show that the soil hydraulic properties significantly affect soil moisture *** soil hydraulic conductivity(Ksat)is optimized based on its observations in each soil layer with a genetic algorithm(GA,a widely used optimization method in hydrology),and the 1-D Richards equation performs well using the optimized *** the range of Ksat for a complete soil profile is known for a particular soil texture(rather than for arbitrary layers within the horizon),optimized Ksat for each soil layer can be obtained by increasing the number of generations in GA,although this increases the computational cost of *** performs well with optimized Ksat,and improves the accuracy of soil moisture simulation more than that with calculated ***,better soil moisture estimation can be obtained by using optimized saturated volumetric soil moisture content *** summary,an accurate soil profile can be obtained by using soil moisture assimilation with optimized soil hydraulic properties.

关键词： soil moisture one-dimensional(1-D)Richards equation unscented weighted ensemble Kalman filter(UWEnKF) soil hydraulic properties genetic algorithm

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A regeneration process-matching scaffold with appropriate dynamic mechanical properties and spatial adaptability for ligament reconstruction

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Bioactive Materials 2022年第7期7卷 82-95页

作者： Xiaojing Xie Junjie Xu Jing Lin Jia Jiang Yunfan Huang Jun Lu Yuhao Kang Yage Hu Jiangyu Cai Fujun Wang Tonghe Zhu Jinzhong Zhao Lu Wang Key Laboratory of Textile Science&Technology of Ministry of Education College of TextilesDonghua UniversityShanghai201620China Department of Sports Medicine Department of OrthopedicsShanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai200233China

Ligament regeneration is a complicated process that requires dynamic mechanical properties and allowable space to regulate collagen *** strength and limited space of currently available grafts hinder tissue regeneration,yielding a disappointing success rate in ligament *** the scaffold retreat rate with the mechanical and spatial properties of the regeneration process remains ***,a scaffold matching the regeneration process was designed via regulating the trajectories of fibers with different degradation rates to provide dynamic mechanical properties and spatial adaptability for collagen *** core-shell structured scaffold exhibited biomimetic fiber orientation,having tri-phasic mechanical behavior and excellent ***,by the sequential material degradation,the available space of the scaffold increased from day 6 and remained stable on day 24,consistent with the proliferation and deposition phase of the native ligament regeneration ***,mature collagen infiltration and increased bone integration in vivo confirmed the promotion of tissue regeneration by the adaptive space,maintaining an excellent failure load of 67.65%of the native ligament at 16 *** study proved the synergistic effects of dynamic strength and adaptive *** scaffold matching the regeneration process is expected to open new approaches in ligament reconstruction.

关键词： Ligament Regeneration process Fiber Dynamic mechanical property Allowable space

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Valence state effect of Cu on photocatalytic CO_(2)reduction

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Materials Reports(Energy) 2023年第4期3卷 39-45页

作者： Fangxu Dai Mingming Zhang Zhenjiang Li Jun Xing Lei Wang School of Pharmacy Jining Medical UniversityRizhao276800PR China Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042PR China College of Sino-German Science and Technology Qingdao University of Science&TechnologyQingdao266042PR China College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao266042PR China College of Environment and Safety Engineering Qingdao University of Science and TechnologyShandong Engineering Research Center for Marine Environment Corrosion and Safety ProtectionQingdao266042PR China

Copper(Cu)is extensively employed in photocatalytic CO_(2)reduction reactions for the production of high-value *** valence state of transition metals plays a pivotal role in influencing the catalytic ***,due to the complex valence state changes of Cu in the CO_(2)reduction reaction,research on its valence state effect is *** current work is to prepare a series of TiO_(2)/CuX with stable Cu valence composition using different copper halides(CuX and CuX_(2),X=Br or Cl)as *** results show that the CuBr_(2)loading leads to Cu^(+)/Cu^(2+) mixed cocatalyst and exhibits the highest activity for CO_(2)*** CH4 evolution rate of the TiO_(2)/CuBr_(2)catalyst is as high as 100.59μmol h^(-1)g^(-1),which is 6.6 times that of pristine TiO_(2).The CH4 selectivity reaches 77%.The enhanced catalytic activity and selectivity can be ascribed to the efficient surface adsorption,activation,excellent carrier separation,and transfer ofCu^(+)/Cu^(2+) mixed *** findings provide a reference for designing highly active Cu-based photocatalysts.

关键词： Valence state Cu Photocatalytic CO_(2)reduction

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Durable and Wearable Self-powered Temperature Sensor Based on Self-healing Thermoelectric Fiber by Coaxial Wet Spinning Strategy for Fire Safety of Firefighting Clothing

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Advanced Fiber Materials 2024年第5期6卷 1387-1401页

作者： Qing Jiang Yuhang Wan Yi Qin Xueru Qu Mi Zhou Siqi Huo Xiaochun Wang Zhicai Yu Hualing He State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Biomass Fibers and Eco-dyeing&FinishingSchool of Textile Science and EngineeringWuhan Textile UniversityWuhan 430200China Centre for Future Materials University of Southern QueenslandSpringfield Central 4300Australia School of Materials Design and Engineering Beijing Institute of Fashion TechnologyBeijing 100029China

Self-healable electronics with self-recoverable mechanical properties show a lot of potential in improving the reliability and durability of wearable electronic devices,but it is still ***,a self-healing core-sheath thermoelectric(TE)fiber-based temperature sensor was continuously fabricated by coaxial wet-spinning strategy,whose core layer and sheath layer are,respectively,pure Ti_(3)C_(2)T_(x)MXene and self-healing silk sericin(SS)/oxide sodium alginate(OSA)*** prepared SS/OSA@MXene core-sheath TE fiber exhibits accurate temperature-sensing at 200-400℃based on a linear relationship between TE voltage and temperature *** core-sheath TE fiber that can be integrated into firefighting clothing and timely alert firefighters to evacuate from the fire before the protective clothing becomes *** exposed to flames,SS/OSA@MXene can rapidly trigger a high-temperature warning voltage of 3.36 mV within 1.17 s and exhibit reversible high-temperature alarm *** addition,the fractured SS/OSA@MXene can restore up to 89.12%of its original strain limit at room temperature because of the robust yet reversible dynamic covalent bonds between SS and *** this study,an ingenious strategy for developing a durable and wearable TE fiber-based self-powered temperature sensor was *** strategy has promising application prospects in real-time temperature detection of firefighting clothing to ensure the safety of firefighters operating on a fire scene.

关键词： Core-sheath thermoelectric fiber Self-powered sensor High-temperature warning Self-healing Coaxial wet spinning

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Thermally conductive poly(lactic acid)/boron nitride composites via regenerated cellulose assisted Pickering emulsion approach

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Journal of Materials science & technology 2022年第6期101卷 146-154页

作者： Yating Wang Hong Jin Jiajun Shen Bijia Wang Xueling Feng Zhiping Mao Yumei Zhang Xiaofeng Sui Key Lab of Science and Technology of Eco-Textile Ministry of EducationCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityNo.2999North Renmin RoadSongjiang DistrictShanghai 201620China Innovation Center for Textile Science and Technology of DHU Donghua UniversityNo.2999North Renmin RoadSongjiang DistrictShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityNo.2999North Renmin RoadSongjiang DistrictShanghai 201620China

Polymer-based thermally conductive composites have attracted tremendous interest in thermal management of ***,it remains challenging to achieve high thermal conductivity partly because the difficulty to obtain favorable distribution and orientation of conductive fillers within the polymer ***,networked boron nitride(BN)conductive pathway was realized within the poly(lactic acid)(PLA)matrix,via regenerated cellulose(RC)-assisted assembly of BN on Pickering emulsion interface based on the noncovalent interaction,followed by solvent evaporation and *** strong noncovalent interactions between BN and RC were found critical to enhance the wettability and stability of BN in aqueous media with a lowest mass ratio of 1:40 of RC and *** obtained PLA/BN composites feature a thermal conductivity of 1.06 W/(m K)at 28.4 wt%BN loading,representing an enhancement of 430%comparing to neat PLA,and the crystallinity of the composites could increase significantly from11.7%(neat PLA)to 43.7%.This simple,environmentally friendly and effective strategy could be easily extended for effective construction of thermally conductive composites.

关键词： Boron nitride Regenerated cellulose Emulsion Noncovalent interaction Thermal conductivity

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