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Experimental Investigation on the Mechanical Properties of Natural Fiber Reinforced Concrete

Journal of Renewable Materials 2022年第5期10卷 1307-1320页

作者： Ismail Shah Jing Li shengyuan yang Yubo Zhang Aftab Anwar School of Architecture and Civil Engineering Yunnan Agricultural UniversityKunming650000China Key Laboratory of Crop Growth and Intelligent Agriculture of Yunnan Province Yunnan Agricultural UniversityKunming650000China

Recently,addition of various natural fibers to high strength concrete has aroused great interest in the field of building *** is because natural fibers are much cheaper and locally available,as compare to synthetic *** in view,this current research conducted mainly focuses on the static properties of hybridized(sisal/coir),sisal and coir fiber-reinforced *** types of natural fibers sisal and coir were used in the experiment with different lengths of 10,20 and 30 mm and various natural fiber concentrations of 0.5%,1.0%,and 1.5%by mass of cement,to investigate the static properties of sisal fiber reinforced concrete(SFRC),coir fiber reinforced concrete(CFRC)and hybrid fiber reinforced concrete(HFRC).The results indicate that HFRC has increased the compressive strength up to 35.98%with the length of 20 mm and with 0.5%concentration,while the CFRC and SFRC with the length of 10 mm and with 1%concentration have increased the compressive strength up to 33.94%and 24.86%,*** another hand,the split tensile strength was increased by HFRC with the length of 20 mm and with 1%concentration,CFRC with the length of 10 mm and with 1.5%concentration,and SFRC with the length of 30 mm and with 1%concentration have increased up to 25.48%,24.56%and 11.80%,respectively,while the HFRC with the length of 20 mm and with 0.5%concentration has increased the compressive strength of concrete but has decreased the split tensile strength up to 2.28%compared to ***,using the HFRC with the length of 20 mm and with 1%concentration provide the maximum output in terms of split tensile strength.

关键词： Sisal fiber reinforced concrete coir fiber reinforced concrete hybrid fibers compressive and tensile strength

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Electrospun Nanofibers-Based Face Masks

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Advanced Fiber Materials 2020年第3期2卷 161-166页

作者： Mike Tebyetekerwa Zhen Xu shengyuan yang Seeram Ramakrishna Research School of Electrical Energy and Materials EngineeringCollege of Engineering and Computer ScienceThe Australian National UniversityCanberraACT 2601Australia Department of Chemical Engineering Imperial College LondonLondon SW72AZUK State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai“Belt&Road”International Joint Laboratory for Advanced Fiber and Low‑Dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China Centre for Nanofibers and Nanotechnology National University of SingaporeSingapore 117581Singapore

Textiles have proved to be very important materials to human beings since the time ***,fibers are the basic building units of these *** this perspective we substantiate the uniqueness and capability of nanofibers as active layers in face masks,to protect people against the novel coronavirus disease(COVID-19).This time-sensitive letter introduces the mechanisms based on which their active filters function,the uniqueness of electrospun nanofibers in face masks and do-it-yourself(DIY)steps to realize a fully functional face mask at home.

关键词： Electrospinning Nanofibers Face masks COVID-19 Textiles

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Combinatorial analysis on spatial information statistics for the karst water environment in Guiyang,China

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Chinese Journal Of Geochemistry 2012年第2期31卷 195-203页

作者： WANG Zhongmei ZHU Lijun yang Ruidong yang shengyuan DING Jianping yang Genlan College of Resources and Environmental Engineering of Guizhou University Guiyang 550003 China Key Laboratory of Karst Environment and Geohazard Prevention （Guizhou University） Ministry of Education Guiyang 550003 China Guizhou Institute of Geological Environment Monitor Guiyang 550001 China

The karst groundwater system is extremely vulnerable and easily contaminated by human *** understand the spatial distribution of contaminants in the groundwater of karst urban areas and contributors to the contamination,this paper employs the spatial information statistics analysis theory and method to analyze the karst groundwater environment in Guiyang *** on the karst ground water quality data detected in 61 detection points of the research area in the last three years,we made Kriging evaluation isoline map with some ions in the karst groundwater,such as SO4 2-,Fe 3+,Mn 2+and F -,analyzed and evaluated the spatial distribution,extension and variation of four types of ions on the basis of this isoline *** results of the analysis show that the anomaly areas of SO4 2-,Fe 3+,Mn 2+,Fand other ions are mainly located in Baba’ao,Mawangmiao and Sanqiao in northwestern Gui- yang City as well as in its downtown area by reasons of the original non-point source pollution and the contamination caused by human activities(industrial and domestic pollution).

关键词：岩溶地下水空间信息统计地下水环境贵阳市组合分析地下水污染中国人类活动

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Transformation of Supercapacitive Charge Storage Behaviour in a Multi elemental Spinel CuMn_(2)O_(4) Nanofibers with Alkaline and Neutral Electrolytes

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Advanced Fiber Materials 2021年第4期3卷 265-274页

作者： Ria Kunwar Syam G.Krishnan Izan Izwan Misnon Fatemeh Zabihi shengyuan yang Chun-Chen yang Rajan Jose Nanostructured Renewable Materials Research Laboratory Faculty of Industrial Sciences and TechnologyUniversity Malaysia Pahang26300 KuantanMalaysia Graphene&Advanced 2D Materials Research Group(GAMRG) School of Engineering and TechnologySunway UniversityNo.5 Jalan UniversitiBandar Sunway47500 Petaling JayaSelangorMalaysia State Key Laboratory for Modification of Chemical Fibers and Polymer Materials International Joint Laboratory for Advanced Fiber and Low-Dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghaiPeople’s Republic of China Battery Research Center for Green Energy Ming Chi University of TechnologyNew Taipei CityTaiwan

Electrode material has been cited as one of the most important determining factors in classifying an energy storage system’s charge storage mechanism,i.e.,as battery-type or *** this paper,we show that along with the electrode material,the electrolyte also plays a role in determining the charge storage behaviour of the *** the purpose of our research,we chose multi-elemental spinal type CuMn_(2)O_(4) metal oxide nanofibers to prove the *** material is synthesized as nanofibers of diameter~120 to 150 nm in large scales by a pilot scale electrospinning set *** was then tested in three different electrolytes(1 M KOH,1 M Na_(2)SO_(4) and 1 M Li_(2)SO_(4)),two of which are neutral and the third is alkaline(KOH).The cyclic voltammograms and the galvanostatic charge-discharge of the electrode material in a three-electrode sys-tem measurement showed that it exhibit different charge storage mechanism in different electrolyte *** the neutral electrolytes,a capacitive behaviour was observed whereas a battery-type behaviour was seen for the alkaline *** leads us to conclude that the charge storage mechanism,along with the active material,also depends on the electrolyte used.

关键词： Energy storage materials Electrochemical double layer capacitors Capacitive charge storage Ternary manganates Pseudocapacitors

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Enhanced Photocatalytic Performance of Surface-Modified TiO_(2) Nanofibers with Rhodizonic Acid

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Advanced Fiber Materials 2020年第2期2卷 118-122页

作者： Yijun Sun Jackson Beja Mwandeje Lodrick MWangatia Fatemeh Zabihi Jovan Nedeljković shengyuan yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials International Joint Laboratory for Advanced Fiber and Low‑Dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China Vinča Institute of Nuclear Sciences University of BelgradeP.O.Box 52211001 BelgradeSerbia Jimma Institute of Technology Jimma University378 JimmaEthiopia

The improvement of the photocatalytic performance of TiO_(2) nanofibers(NFs),prepared by electrospinning,is achieved by surface modification with the rhodizonic acid(RhA).The condensation reaction between hydroxyl groups from TiO_(2) NFs and RhA is accompanied by the red-shift of optical absorption due to interfacial charge transfer(ICT)complex *** structure,morphology,and optical properties of unmodified and surface-modified TiO_(2) NFs were *** photocatalytic performance of prepared samples has been examined through degradation of organic dye methylene *** photocatalytic activity of surface-modified TiO_(2) NFs with RhA is attributed to their enhanced optical properties,i.e.,the ability to harvest the photon energy in the visible spectral range.

关键词： TiO_(2)nanofibers Surface modification Rhodizonic acid Interfacial charge transfer complex Crystal structure Photocatalytic performance

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Recent Progress of Electrospun Nanofbers for Zinc–Air Batteries

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Advanced Fiber Materials 2022年第2期4卷 185-202页

作者： Yanan Hao Feng Hu Ying Chen Yonghan Wang Jianjun Xue shengyuan yang Shengjie Peng College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China State Key Laboratory for Modifcation of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai 201620People’s Republic of China

As a potential electrochemical energy storage device,zinc–air batteries(ZABs)received considerable interest in the feld of energy conversion and storage due to its high energy density and ***,the sluggish kinetics of the oxygen reduction and oxygen evolution reactions limit the commercial development of ZABs,so it is of great signifcance to develop efcient,low-cost and non-noble metal bifunctional *** one-dimensional nanofbers with unique properties such as high porosity and large surface area have great advantages on possessing more active sites,shortening the difusion pathways for ions/electrons,and improving the kinetics via intercalation/de-intercalation processes,which endow them with promising application in the feld of energy storage devices,especially *** review frstly introduces the electrospinning ***,the oxygen reduction/evolution reaction triggered by electrospun nanofbers with selfsupported structures are presented,followed by the application of electrospun nanofbers for liquid and fexible solid-state ***,the remaining challenges and research directions of ZABs based on electrospun nanofbers electrocatalysts are briefy discussed.

关键词： Electrospinning Nanofibers Self-supported structures Bifunctional electrocatalysts Zinc-air batteries

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Numerical investigation on the flow characteristics of a reverse-polarity plasma torch by two-temperature thermal non-equilibrium modelling

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Plasma Science and Technology 2021年第9期23卷 86-101页

作者： Zhengxin YIN Deping YU Yana WEN Qingbo ZHANG Jier QIU shengyuan yang School of Mechanical Engineering.Sichuan University Chengdu 610065People's Republic of China

A two-temperature(2 T)thermal non-equilibrium model is developed to address the thermal nonequilibrium phenomenon that inevitably exists in the reverse-polarity plasma torch(RPT)and applied to numerically investigate the plasma flow characteristics inside and outside the ***,a detailed comparison of the results of the 2 T model with those of the local thermal equilibrium(LTE)model is ***,the temperature of the plasma jet generated by a RPT and the RPT’s voltage are experimentally measured to compare and validate the result obtained by different *** differences of the measured excitation temperature and the arc voltage between the 2 T model and experimental measurement are less than 13%and 8%,respectively,in all operating cases,validating the effectiveness of the 2 T *** LTE model overestimates the velocity and temperature distribution of the RPT and its plasma jet,showing that thermal non-equilibrium phenomena cannot be neglected in the numerical modelling of the *** other common hot cathode plasma torches,the thermal non-equilibrium phenomenon is found even in the arc core of the RPT,due to the strong cooling effect caused by the big gas flow rate.

关键词： optical emission spectroscopy reverse-polarity plasma torch temperature measurement two-temperature thermal non-equilibrium modelling

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Perovskite Solar Fibers:Current Status,Issues and Challenges

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Advanced Fiber Materials 2019年第2期1卷 101-125页

作者： Andrew Balilonda Qian Li Mike Tebyetekerwa Rogers Tusiime Hui Zhang Rajan Jose Fatemeh Zabihi shengyuan yang Seeram Ramakrishna Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials International Joint Laboratory for Advanced Fiber and Low-dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China Research School of Electrical Energy and Materials EngineeringCollege of Engineering and Computer ScienceThe Australian National UniversityCanberraACT 2601Australia Nanostructured Renewable Energy Materials Laboratory Faculty of Industrial Sciences and TechnologyUniversiti Malaysia Pahang26300 PekanMalaysia Centre for Nanofibers and Nanotechnology National University of SingaporeSingapore 117581Singapore

Perovskite-based solar cells with high power conversion efficiencies(PCEs)are currently being demonstrated in solid-state device *** elevated performances can possibly be attained with different non-standard geometries,for example,the fiber-shaped perovskite solar cells,in the light of careful design and ***-shaped solar cells are promising in smart textiles energy harvesting towards next-generation electronic applications and *** can be made with facile process and at low ***,fiber-shaped perovskite solar devices have been reported,particularly with the focus on the proof-of-concept in such non-traditional *** this line,there are so many technical aspects which need to be addressed,if these photovoltaic(PV)cells are to be industrialized and produced ***,a well-organized and comprehensive discussion about the reported devices in this arena is *** challenges that need to be addressed,the possible solutions and the probable applications of these PV cells are also *** still,the perovskite fiber-shaped PV cells with other fiber PV devices reported in literature in terms of their scope,characteristic designs,performances,and other technical considerations have been summarised.

关键词： Fiber-shaped solar cells Perovskites Photovoltaics Smart textiles Fiber materials

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Interface-induced polymerization strategy for constructing titanium dioxide embedded carbon porous framework with enhanced chemical immobilization towards lithium polysulfides

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Nano Research 2024年第3期17卷 1473-1481页

作者： Yue Ouyang Xiaoxiao Li Jiexin Zhu Wei Zong Yuhang Dai Xuan Gao Wei Zhang shengyuan yang Roohollah Bagherzadeh Feili Lai Yue-E Miao Tianxi Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai 201620China The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China Advanced Fibrous Materials LAB Institute for Advanced Textile Materials and Technologies(ATMT)School of Advanced Materials and ProcessesAmirkabir University of TechnologyTehran 15914Iran Christopher Ingold Laboratory Department of ChemistryUniversity College London20 Gordon StreetLondon WC1H 0AJUK Department of Chemistry KU LeuvenCelestijnenlaan 200FLeuven 3001Belgium

The shuttle effect induced by soluble lithium polysulfides(LiPSs)is known as one of the crucial issues that limit the practical applications of lithium-sulfur(Li-S)***,a titanium dioxide nanoparticle embedded in nitrogen-doped porous carbon nanofiber(TiO_(2)@NCNF)composite is constructed via an interface-induced polymerization strategy to serve as an ideal sulfur *** the protection of the nanofiber walls,the uniformly dispersed TiO_(2) nanocrystalline can act as capturing centers to constantly immobilize LiPSs towards durable sulfur ***,the mesoporous microstructure in the fibrous framework endows the TiO_(2)@NCNF host with strong physical reservation for sulfur and LiPSs,sufficient pathways for electron/ion transfer,and excellent endurance for volume *** expected,the sulfur-loaded TiO_(2)@NCNF composite electrode presents a fabulous rate performance and long cycle lifespan(capacity fading rate of 0.062%per cycle over 500 cycles)at 2.0 ***,the assembled Li-S batteries harvest superb areal capacity and cycling stability even under high sulfur loading and lean electrolyte conditions.

关键词： interface-induced polymerization electrospun porous nanofibers lithium-sulfur(Li-S)batteries high sulfur loading lithium polysulfides(LiPSs)immobilization

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基于数据相关性的STL曲面网格快速重建算法

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计算机辅助设计与图形学学报 2009年第1期21卷 67-71页

作者：杨晟院舒适湘潭大学数学与计算科学学院湘潭411105 湘潭大学信息工程学院湘潭411105

通过分析大量STL文件中的三角形单元数据,发现文件中顺序相邻的2个独立的三角形网格单元至少共一个顶点的概率大约是0.84～0.99,共2个顶点的概率大约是0.67～0.75,表明相邻网格单元数据存在强相关性以及大量的冗余信息.利用这种数据相关... 详细信息

通过分析大量STL文件中的三角形单元数据,发现文件中顺序相邻的2个独立的三角形网格单元至少共一个顶点的概率大约是0.84～0.99,共2个顶点的概率大约是0.67～0.75,表明相邻网格单元数据存在强相关性以及大量的冗余信息.利用这种数据相关性,从概率的角度给出了一条检查冗余点的有效途径,进而得到一种快速的STL三角形曲面网格重建算法.新的曲面网格数据文件存储容量为原来的25%左右,有效地去除了冗余数据.实验结果表明了该算法的高效性及鲁棒性.

关键词： STL文件三角形网格网格重建数据相关性概率

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