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Tree Ring‑Inspired Fibrous Helix for UV Shielding and Warning Based on Photo‑electricity‑Acoustic Energy Conversion

Advanced Fiber Materials 2023年第2期5卷 681-693页

作者： Yan Wang Ziyi Guo Jie Xiong jingchong liu Yong Zhao Fengyun Guo Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province School of Textile Science and Engineering(International Silk Institute)Zhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory of Bioinspired Intelligent Interface Science and Technology Ministry of Education School of Chemistry Beihang UniversityBeijing 100191China Beijing Key Laboratory for Bioengineering and Sensing Technology Daxing Research InstituteSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Flexible wearable ultraviolet(UV)shielding,monitoring and warning devices have important applications in civil and mili-tary fields.However,most flexible wearable UV devices show unsatisfactory performance due to their poor stability and easy failure at large strains.Herein,inspired by tree rings,we engineered a hierarchical composite nanofibrous helix with an alternately stacked Archimedes spiral structure via a cost-effective strategy.Based on a photo-electricity-acoustic energy conversion system,we fabricated an all-in-one device exhibiting strain-insensitive UV protection at 0–500%strain for UV shielding as well as strain-sensitive UV monitoring at 500–1500%strain for UV early warning.Compared with previously reported common nanofibrous membrane devices,the as-prepared composite nanofibrous helix shows great advantages in terms of stability and UV protection,especially at large strains.Furthermore,the helix demonstrates multiple functions of wear resistance,antibacterial properties,biodegradation and knittability.This versatile strategy holds great promise for wearable electronics and multifunctional devices.

关键词： Electrospinning Nanofibrous helix Energy conversion UV shielding and warning Multifunction Flexible electronics

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Fabrication and Applications of Multi-Fluidic Electrospinning Multi-Structure Hollow and Core–Shell Nanofibers

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Engineering 2022年第6期8卷 116-127页

作者： Dianming Li Guichu Yue Shuai Li Jing liu Huaike Li Yuan Gao jingchong liu Lanlan Hou Xiaofeng liu Zhimin Cui Nü Wang Jie Bai Yong Zhao Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070China College of Chemical Engineering Inner Mongolia University of TechnologyHohhot 010051China

Recently,electrospinning(ESP)has been widely used as a synthetic technology to prepare nanofibers with unique properties from various raw materials.The applications of functionalized nanofibers have gradually developed into one of the most exciting topics in the field of materials science.In this review,we focus on the preparation of multi-structure fibrous nanomaterials by means of multi-fluidic ESP and review the applications of multi-structure nanofibers in energy,catalysis,and biology.First,the working principle and process of ESP are introduced;then,we demonstrate how the microfluidic concept is com-bined with the ESP technique to the multi-fluidic ESP technique.Subsequently,the applications of multi-structure nanofibers in energy(Li^(+)/Na^(+)batteries and Li–S batteries),hetero-catalysis,and biology(drug delivery and tissue engineering)are introduced.Finally,challenges and future directions in this emerging field are summarized.

关键词： Electrospinning Microfluidics Multi-fluidic Hollow structure Nanofibers

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Regularly channeled MXene membranes for ionic and molecular separation

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Frontiers of Chemical Science and Engineering 2021年第3期15卷 591-594页

作者： jingchong liu Nü Wang Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191China

Membrane-based separation technologies,compared with other traditional separation operations such as evaporation,extraction,precipitation and distillation,have the merits of low energy consumption,small land footprint and high efficiency and have,therefore,attracted wide attention in past decades[1,2].Laminar membranes formed by twodimensional(2D)nanosheet stacking showed high flexibility in adjusting the subnanoscale interlayer spacing to allow the unhindered transport of small ions or molecules,demonstrating high separation performance and economic applicability[3].

关键词： separation membranes distillation

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Pea-like MoS_(2)@NiS_(1.03)-carbon heterostructured hollow nanofibers for high-performance sodium storage

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Carbon Energy 2023年第4期5卷 42-54页

作者： Songwei Gao Yixiang He Guichu Yue Huaike Li Shuai Li jingchong liu Beibei Miao Jie Bai Zhimin Cui Nu Wang Qianfan Zhang Lei Jiang Yong Zhao Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Bio‐Medical EngineeringBeihang UniversityBeijingChina School of Materials Science and Engineering Beihang UniversityBeijingChina School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijingChina Inner Mongolia Key Laboratory of Industrial Catalysis Chemical Engineering CollegeInner Mongolia University of TechnologyInner MongoliaHohhotChina Laboratory of Bio-inspired Smart Interface Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingChina

The rational synergy of chemical composition and spatial nanostructures of electrode materials play important roles in high-performance energy storage devices.Here,we designed pea-like MoS_(2)@NiS_(1.03)-carbon hollow nanofibers using a simple electrospinning and thermal treatment method.The hierarchical hollow nanofiber is composed of a nitrogen-doped carbon-coated NiS_(1.03) tube wall,in which pea-like uniformly discrete MoS_(2) nanoparticles are enclosed.As a sodium-ion battery electrode material,the MoS_(2)@NiS_(1.03)-carbon hollow nanofibers have abundant diphasic heterointerfaces,a conductive network,and appropriate volume variation-buffering spaces,which can facilitate ion diffusion kinetics,shorten the diffusion path of electrons/ion,and buffer volume expansion during Na^(+)insertion/extraction.It shows outstanding rate capacity and long-cycle performance in a sodium-ion battery.This heterogeneous hollow nanoarchitectures designing enlightens an efficacious strategy to boost the capacity and long-life stability of sodium storage performance of electrode materials.

关键词： density functional theory electrospinning heterostructure hollow nanofibers molybdenum disulfide sodium-ion batteries

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Okra‑Like Multichannel TiO@NC Fibers Membrane with Spatial and Chemical Restriction on Shuttle‑Effect for Lithium–Sulfur Batteries

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Advanced Fiber Materials 2023年第1期5卷 252-265页

作者： Shuai Li jingchong liu Linlin Ma Li‑Juan Yu Lanlan Hou Dianming Li Songwei Gao Guichu Yue Zhimin Cui NüWang Xiaoxian Zhao Yong Zhao Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191People’s Republic of China Beijing Key Laboratory for Bioengineering and Sensing Technology Daxing Research InstituteSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding 071001People’s Republic of China Research School of Chemistry Australian National UniversityAustralian Capital TerritoryCanberra 2601Australia School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

It is especially important to coordinately design the structure and composition of the host in lithium–sulfur batteries(LSBs)for improving its physicochemical adsorption and conversion of lithium polysulfide,which can alleviate the harmful shuttle effect.Herein,a self-supporting multichannel nitrogen-doped carbon fibers membrane embedded with TiO nanoparticles(TiO@NC)was constructed as the electrode for LSBs.The inner channels and the embedded TiO nanoparticles offer spatial confinement and chemical binding for polysulfides,respectively.Moreover,the TiO nanoparticles have abundant oxygen vacancies that promote the conversion of polysulfides.In addition,the nitrogen-doped carbon skeleton can not only serve as highly conductive transportation paths for electrons,but also integrate with the inner channels to sustain the morphology and bear volume expansion during cycling processes.Therefore,the fabricated self-supporting quadruple-channel TiO@NC ultrathin fibers electrode exhibits a high initial specific capacity of 1342.8 mAh g^(-1)at 0.5 C and high-rate capability of 505.8 mAh g^(-1)at 4.0 C.In addition,it maintains 696.0 mAh g^(-1)over 500 cycles with only 0.059%capacity decay per cycle at the high current density of 2.0 C.The multichannel configuration combined with TiO nanoparticles provides a synergetic design strategy for fabricating high-performance electrodes in LSBs.

关键词： Multichannel Electrospinning Hierarchical structure Spatial confinement Chemical binding Lithium–sulfur battery

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Bioinspired membranes for multi-phase liquid and molecule separation

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Science China Chemistry 2019年第1期62卷 14-23页

作者： jingchong liu Zhimin Cui Lanlan Hou Dianming Li Yuan Gao Li Shuai Jing liu Jian Jin Nü Wang Yong Zhao Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and Devices School of Chemistry Beijing Advanced Innovation Center for Biomedical Engineering Beihang University i-Lab CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Nano-Bio Interface Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences

Water pollution is a serious problem around the world. It causes the lack of clean drinking water and brings risks to human health.Membrane technology has become a competitive candidate to treat the contaminated wastewater due to its high separation efficiency and low energy consumption. In this review, we introduce the recent development of several kinds of bioinspired separation membranes, involving the membrane design and applications. We emphasize the multi-phase liquid separation membranes inspired from nature with special wettability applied for oil/water separation, organic liquids mixture separation, and emulsion separation. After separating multi-phase liquids using these membranes, small molecule pollutants still exist in singlephase liquid. Therefore, we also expand the scope to small molecule-scale separation membranes, such as the nacre-like graphene oxide separation membrane and other nanofiltration membranes. Summary and outlook concerning the future development of separation membranes are also introduced briefly.

关键词： bioinspired superhydrophobic superwettability nanofibers separation membrane

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Electrospinning Janus Nanofibrous Membrane for Unidirectional Liquid Penetration and Its Applications

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Chemical Research in Chinese Universities 2021年第3期37卷 337-354页

作者： HOU Lanlan liu jingchong LI Dianming GAO Yuan WANG Yaqiong HU Rongjun REN Wen XIE Shuixiang CUI Zhimin WANG Nü State Key Laboratory of Petroleum Pollution Control CNPC Research Institute of Safety and Environmental TechnologyBeijing102206P.R.China Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing100191P.R.China

Janus membrane with opposite wettability on its two sides has witnessed an explosion of interest in the field of liquid spontaneous and directional transport for their promising prospect.The advances in fabrication technology and natural bionics have brought remarkable progress for the development of Janus materials.Among the exciting progress,the micro/nanofabrication technique of electrospinning shows advantages in constructing thin porous fibrous membrane materials with controllable surface wettability and hierarchical structures.Here,a brief review of bioinspired Janus membrane for unidirectional liquid penetration fabricated by electrospinning is presented,and the underlying scientific mechanism is discussed with an emphasis on the materials design involving asymmetric surface wettability and micro-topology structure.An overview of recent emerging applications is also reviewed,with special attentions to liquid separation,water collection,distillation,and smart textile,etc.As researchers keep to develop more efficient strategies on designing new Janus membrane with higher performances,it has become increasingly important to understand the mechanism of liquid moving dynamics at the asymmetric interface in order to better recognize the scientific limitations currently hindering the field development.At last,the challenges currently faced and possible strategies on developing new Janus membranes for optimization and engineering in the future are proposed.

关键词： Electrospinning Nanofiber Janus membrane Unidirectional penetration Wettability gradient

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不同边界工况下受电弓区域流场结构及气动噪声特性对比分析

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中国铁道科学 2024年第3期45卷 117-127页

作者：潘永琛张格明李志强柳润东刘兰华苏林潘镜冲中国铁道科学研究院集团有限公司节能环保劳卫研究所北京100081 中国铁道科学研究院集团有限公司科信部北京100081 中国科学院声学研究所中国科学院水声环境特性重点实验室北京100190

为研究流场结构对受电弓气动噪声的影响,运用分离涡模拟方法和FW-H方程对高速受电弓区域流场结构和气动声场进行数值计算,对比分析平面和车体凹腔2种边界工况下流场特性、涡旋结构以及气动噪声特性的变化差异,为局部结构的气动声学优化... 详细信息

为研究流场结构对受电弓气动噪声的影响,运用分离涡模拟方法和FW-H方程对高速受电弓区域流场结构和气动声场进行数值计算,对比分析平面和车体凹腔2种边界工况下流场特性、涡旋结构以及气动噪声特性的变化差异,为局部结构的气动声学优化以及仿真预测提供参考。结果表明:边界形式对局部流动具有明显的调制作用,速度场、涡量场均发生较显著的变化,相比于平面边界工况,车体凹腔边界工况下涡旋尺度增大,流动结构变得更为“有序”;车体凹腔边界工况下受电弓表面声压级相对较低,且气动噪声能量主要分布集中在500 Hz内的低频段;不同边界工况下Lamb矢量散度分布特征显示,气动声源的类型未发生变化,且车体凹腔边界工况下气动声源强度相对较弱;2种边界工况下的螺旋度分布差异意味着边界形式对流场的调制影响湍流能量的输运过程以及气动噪声能量的转化效率。

关键词：受电弓流场气动噪声边界形式涡旋结构

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基于视觉感知的杭州天目里立面标识分析

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时尚设计与工程 2024年第2期 12-14,17页

作者：刘䶮周景崇浙江理工大学

近年来,商业综合体及商业步行街的建造与改造成为推动城市特色形象的新型表达方式。针对杭州天目里的品牌立面及店铺标识问题,从视觉可识别性、形象独特性及主题延续性这3个方面进行分析,以视觉感知作为理论的支撑依据,深入分析天目里... 详细信息

近年来,商业综合体及商业步行街的建造与改造成为推动城市特色形象的新型表达方式。针对杭州天目里的品牌立面及店铺标识问题,从视觉可识别性、形象独特性及主题延续性这3个方面进行分析,以视觉感知作为理论的支撑依据,深入分析天目里的店铺立面的空间视觉感受,探索符合视觉感知且具有品牌特色的商业街店铺视觉系统。

关键词：外立面店铺标识视觉感知同质化

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Boosting chemical looping combustion performances of red mud with transition metal oxides

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Carbon Resources Conversion 2022年第2期5卷 119-130页

作者： jingchong Yan Li Zhang Jing He Muxin liu Zhiping Lei Zhanku Li Zhicai Wang Shibiao Ren Hengfu Shui School of Chemistry&Chemical Engineering Anhui Province Key Laboratory of Coal Clean Conversion and High Valued UtilizationAnhui University of TechnologyMaanshan 243002China School of Computer Science and Technology Anhui University of TechnologyMaanshan 243002China School of Materials and Chemical Engineering Bengbu UniversityBengbuAnhui Province 233030China

Red mud(RM)is industrial solid waste that severely threatens environmental safety,and its resource utilization is significant both economically and ecologically.The presence of ferric oxides(Fe_(2)O_(3))makes RM potential oxygen carriers(OC)for chemical looping combustion(CLC),which is a promising,novel and low-carbon combustion technology.This work examined the CLC performance of two kinds of RM using gaseous and solid fuels.Both Fe_(2)O_(3) and alkali and alkaline-earth metals(AAEM)species within RM enhance carbon conversion during CLC.Nevertheless,the reactivity of original RM is unsatisfactory due to its low oxygen transporting capacity(R_(0),lower than 0.1),carbon conversion(X_(C),less than 0.8),CO_(2) selectivity(Y_(CO_(2)),less than 0.9)and instable performance.Transition metal oxides including CuO and NiO were used to modify the RM through wet impregnation.Both oxides notably improve RM performances,i.e.,X_(C) and Y_(CO_(2)) are notably increased.Still,deteriorations during redox cycles are observed because of particle agglomeration and sintering,especially for the RM modified with NiO.Considering the cost,potential environmental risk and efficacy,CuO is superior to NiO thanks to the enhanced performances of the modified RM-based OC including higher X_(C)(about 0.9),Y_(CO_(2))(approximately 1)and stronger sintering resistance.

关键词： Red mud Chemical looping combustion Oxygen carriers Reactivity Agglomeration

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