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Recent Advances in Fibrous Materials for Hydroelectricity Generation

Nano-Micro Letters 2025年第2期17卷 109-133页

作者： Can Ge duo xu Xiao Feng Xing Yang Zheheng Song Yuhang Song Jingyu Chen Yingcun Liu Chong Gao Yong Du Zhe Sun Weilin xu Jian Fang College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123People’s Republic of China National Engineering Laboratory for Modern Silk Soochow UniversitySuzhou 215123People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Department of Electrical and Computer Engineering University of MassachusettsAmherstMA 01003USA Department of Materials Imperial College LondonSouth Kensington CampusLondon SW72AZUK College of Textile Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China School of Materials Science and Engineering Shanghai Institute of Technology100 Haiquan RoadShanghai 201418People’s Republic of China

Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable *** generation from ubiquitous and spontaneous phase transitions between liquid and gaseous water has been considered a promising strategy for mitigating the energy *** materials with unique flexibility,processability,multifunctionality,and practicability have been widely applied for fibrous materials-based hydroelectricity generation(FHG).In this review,the power generation mechanisms,design principles,and electricity enhancement factors of FHG are first ***,the fabrication strategies and characteristics of varied constructions including 1D fiber,1D yarn,2D fabric,2D membrane,3D fibrous framework,and 3D fibrous gel are ***,the advanced functions of FHG during water harvesting,proton dissociation,ion separation,and charge accumulation processes are analyzed in ***,the potential applications including power supply,energy storage,electrical sensor,and information expression are also ***,some existing challenges are considered and prospects for future development are sincerely proposed.

关键词： Hydroelectricity Fibrous material Streaming potential Ion diffusion

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An overview of fluids mixing in T-shaped mixers

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Theoretical & Applied Mechanics Letters 2023年第4期13卷 329-337页

作者： Huixin Li duo xu The State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing100190China b School of Engineering Science University of Chinese Academy of SciencesBeijing100049China

In a T-shaped mixer,the two liquid streams in the inlet channels meet each other at the T-junction,and their liquid-liquid contacting face exhibits planar,swirling folds and the folds breaking to be chaos and turbulence,as the Reynolds number *** characteristic mixing scenario attracts long-time attention,given these mixings are of fundamental importance in fluid physics and also have been successfully used in engineering *** experimental and numerical studies of flow features and mixing characteristics in T-mixers are overviewed in this *** review introduces the experimental and numerical techniques in the studies,the flow and mixing characteristics in the corresponding regimes and application examples of the T-mixers at last,aiming at introducing fundamentals to researchers with initial interests on this topic.

关键词： T-mixer Mixing Numerical simulations Experiments

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Dynamic self-assembly of block copolymers regulated by time-varying building block composition via reversible chemical reaction

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Science China Chemistry 2019年第12期62卷 1666-1674页

作者： duo xu Li Zhao Kuo Zhang Zhong-Yuan Lu State Key Laboratory of Supramolecular Structure and Materials Institute of Theoretical ChemistryJilin UniversityChangchun 130023China College of Life Sciences Jilin UniversityChangchun 130012China

Dynamic self-assembly processes occurring out of thermodynamic equilibrium underlie many forms of adaptive and intelligent behaviors in natural *** of the continuous input of energy,the dynamic self-assembly provides the opportunity for creating structures that are unattainable in equilibrium *** this paper,we propose a strategy in the dynamic self-assembly of amphiphilic block copolymers regulated by reversible chemical *** time-dependently tuning the reaction direction in the simulations,the amphiphilicity of building block keeps changing *** on this dynamic process,we can obtain exotic self-assembled vesicle with surface pores which is otherwise metastable in an equilibrium *** effects induced by the type of chemical reaction and the reaction period are *** at short reaction period in suitable reversible reaction,novel self-assembly structure *** is attributed to the competition of reaction and diffusion in the dynamic process,by which the local component of building blocks alters a lot,leading to large local surface tension resulting in the formation of perforated *** order to predict the assembled structure in a dynamic process,we build up the relationship between component ratio P,the diffusion effect parameter Pdiff and assembled *** dynamic self-assembly regulated by chemical reaction holds great promise as a rational strategy to realize exotic functional materials that are not easily obtained in equilibrium.

关键词： dynamic self-assembly block copolymer reversible reaction computer simulation

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Development and application of flexible substrate sensors in instantaneous heat flux measurement

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Chinese Science Bulletin 2009年第8期54卷 1311-1316页

作者： xu duo GU JiaHua WU Song Key Laboratory of High Temperature Gas Dynamics Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

A new type of sensor with the flexible substrate is *** is applicable in measuring instantaneous heat flux on the model surface in a hypersonic shock *** working principle,structure and manufacture process of the sensor are *** substrate thickness and the dynamic response parameter of the sensor are *** this sensor was successfully used in measuring the instantaneous heat flux on the surface of a flat plate in a detonation-driven shock tunnel,it may be effective in measuring instantaneous heat flux on the model surface.

关键词：柔性衬底传感器热通量测量瞬时应用激波风洞高超声速

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A new barycenter code discriminator for multi-access interference

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Science China(Information Sciences) 2014年第2期57卷 113-121页

作者： WANG YongQing LI Cong xu duo YANG Na School of Information and Electronics Beijing Institute of Technology

The performance of code tracking loop in direct sequence spread spectrum system decreases because of multi-access *** order to solve this problem,this paper presents a new code discriminator based on barycenter *** calculating the barycenter of code phase by multiple PN code branches’correlation results,PN code phase error can be *** analysis of new discriminator’s performance is given,and it is indicated that the code tracking loop using this algorithm can also solve the problems of low ranging precision and large mean deviation caused by multi-access *** efciency of the proposed algorithm is verified by simulation and measurements and the new discriminator is used in an aerospace engineering project successfully.

关键词： direct sequence spread spectrum code tracking loop code discriminator barycenter tracking

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Flavonoids from Litchi(Litchi chinensis Sonn.) Seeds and Their Inhibitory Activities on α-Glucosidase

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Chemical Research in Chinese Universities 2013年第4期29卷 682-685页

作者： REN Shen xu duo-duo GAO Yang MA Yu-ting GAO Qi-pin Research and Development Center Changehun University of Traditional Chinese Medicine Changchun130117 P. R. China College of Traditional Chinese Medicine Jilin Agricultural University Changehun130118 P R. China

With the bioactivity-guided method,a new flavanone glycoside,together with nine known flavonoids were isolated from 50% aqueous ethanol of litchi（Litchi chinensis Sonn.） *** chemical structure of the new compound was elucidated via 1D and 2D nuclear magnetic resonance（NMR） techniques and mass spectrometry to be （2S）-pinocembrin-7-O-（6＂-O-α-L-arabinosyl-β-D-glucopyranoside）（1）,and the nine known compounds were determined to be quercetin（2）,phlorhizin（3）,pinocembrin-7-O-glucoside（4）,kaempferol-7-O-β-D-glucopyranoside（5）,onychin（6）,nairutin（7）,narcissin（8）,pinocembrin-7-O-[（6＂-O-β-D-glucopyranoside）-β-D-glucopyranoside]（9） and pinocembrin-7-O-[（2＂,6＂-di-O-α-L-rhamnopyranosyl）-β-D-glucopyranoside]（10）.Some of the isolated flavonoids were tested for their inhibitory effects on α-*** compounds 2 and 3 showed stronger inhibitory activity than positive control.

关键词： Litchi chinensis Sonn.seed Flavanoid Inhibitory activity α-Glucosidase

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Hilbert-Huang transform with adaptive waveform matching extension and its application in power quality disturbance detection for microgrid

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Journal of Modern Power Systems and Clean Energy 2016年第1期4卷 19-27页

作者： Peng LI Jing GAO duo xu Chang WANG Xavier YANG State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBaoding 071003China R&D of Electricite de France(EDF) China CenterBeijingChina

With the significant improvement of microgrid technology, microgrid has gained large-scale ***, the existence of intermittent distributed generations, nonlinear loads and various electrical and electronic devices causes power quality problem in microgrid, especially in islanding mode. An accurate and fast disturbance detection method which is the premise of power quality control is necessary. Aiming at the end effect and the mode mixing of original Hilbert-Huang transform(HHT), an improved HHT with adaptive waveform matching extension is proposed in this paper. The innovative waveform matching extension method considers not only the depth of waveform, but also the rise time and fall time. Both simulations and field experiments have verified the correctness and validity of the improved HHT for power quality disturbance detection in microgrid.

关键词： Adaptive waveform matching extension End effect Improved Hilbert-Huang transform Microgrid Power quality

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Insight into Biophysicochemical Principles of Biopolymers through Simulation and Theory

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Chinese Journal of Polymer Science 2023年第9期41卷 1342-1354,I0005页

作者： Hai-Xiao Wan duo xu xue-Wei Dong Kai Yang Li-Tang Yan State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing100084China Center for Soft Condensed Matter Physics and Interdisciplinary Research&School of Physical Science and Technology Soochow UniversitySuzhou215006China

The development of biopolymers for biomedical applications has traditionally been based on new ***,there is growing recognition that the biological responses can be regulated by the physical as well as the chemical properties of *** the biophysicochemical principles regarding biopolymers is thereby of great importance in the generation of advanced ***,this review article seeks to provide a conceptual framework demonstrating how the approaches of tailored computer simulations and theoretical analysis are harnessed to explore the physicochemical principles of biopolymer cellular *** briefly introduce the theoretical and simulation methods used in this field,summarize the typical findings based on these approaches,and describe the correlations between theoretical results and ***,the future prospects for the theoretical aspect of biopolymers and their biophysicochemical interactions are *** knowledge might be critical from the perspective of advantageous and safe use of designer biomaterials.

关键词： Biopolymers Computer simulation Theoretical analysis Biophysicochemical interaction Biophysics

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Molecular Simulations in Macromolecular Science

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Chinese Journal of Polymer Science 2023年第9期41卷 1361-1370,I0005页

作者： duo xu Hai-Xiao Wan xue-Rong Yao Juan Li Li-Tang Yan State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing100084China Beijing Research Institute of Chemical Industry SINOPECBeijing100013Chin

Molecular simulations are now an essential part of modern chemistry and physics,especially for the investigation of *** have evolved into mature approaches that can be used effectively to understand the structure-to-property relationships of diverse macromolecular *** this article,we provide a tutorial on molecular simulations,focusing on the technical and practical *** prominent and classical simulation methods and software are *** applications of molecular simulations in various directions of macromolecular science are thenfeatured by representative systems,including self-assembly,crystallization,chemical reaction,and some typical non-equilibrium *** tutorial paper provides a useful overview of molecular simulations in the rapid progress of macromolecular science,and suggests guidance for researchers who start exploiting molecular simulations in their study.

关键词： Molecular simulation Coarse-grained molecular dynamics Multi-scale method Polymer physics

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Hofmeister Effect on Thermo-responsive Poly(N-isopropylacrylamide)Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges

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Chinese Journal of Polymer Science 2020年第3期38卷 257-267,I0006页

作者： Kai Shi Di Sha Jiu-duo xu xu Yang Bao-Long Wang Yan-Xiong Pan Xiang-Ling Ji State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Chinese Academy of Sciences Beijing 100049China

In this work,the Hofmeister effects of nine kinds of anions at different concentrations on the lower critical solution temperature(LCST)of the macroporous thermo-responsive poly(N-isopropylacrylamide)grafted poly(vinyl alcohol)formaldehyde(PVF-g-PNIPAM)hydrogels are investigated with differential scanning calorimetry(DSC).Four kinds of anions with strong hydration,including CO3^2–,SO4^2–,S2 O3^2–,and F^–,and four kinds of anions with weak hydration,including Br^–,NO3^–,I^–,and ClO4^–,and Cl^–as a medium anion are systematically studied and found to demonstrate the effects of the residual hydroxyl groups and network structure of PVF on the LCST values of PVF-g-PNIPAM hydrogels in comparison with that of neat *** the one hand,the existence of hydroxyl groups on PVF backbone promotes the solubility of grafted PNIPAM due to their hydrophilicity and hydrogen-bond interactions with *** the other hand,the network structure of as-prepared samples restricts free movements of grafted PNIPAM chains,which results in the increase of LCST *** addition,the difference of grafting percentage also influences the variation of LCST values of PVF-g-PNIPAM hydrogels under salt concentration.

关键词： Hofmeister effect Thermo-responsive PVF-g-PNIPAM Hydroxyl groups Network structure

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