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Quaternized chitosan/Pluronic F127 thermosensitive hydrogel with high antibacterial properties for wound dressing

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Progress in Natural Science:Materials International 2023年第5期33卷 581-592页

作者： Kaiting Cheng Yiming Fang Liang Bai Feng Gui Junchi Ma Huimin Gao Yadong Zhao xingtao xu Marine Science and Technology College Zhejiang Ocean University Anhui Snow Dragon Fibre Technology CO. LTD. School of Food and Pharmacy Zhejiang Ocean University

In everyday life, traditional dressings such as band-aid and gauze are used for dealing with small ***, these dressings have shortcomings such as pain caused by tearing, inapplicability to joints, single functionality, and adverse reactions. Therefore, there is a great need for an inexpensive, comfortable, and multifunctional wound dressing. In this study, quaternized chitosan(QCS) with a high degree of substitution(107.84%) was successfully prepared and characterized using ultraviolet–visible(UV–vis) spectroscopy, Fourier transform infrared(FT-IR) spectroscopy, X-ray diffraction(XRD), and proton nuclear magnetic resonance(1H NMR). A series of QCS/F127 thermosensitive hydrogels were prepared by physical cross-linking and used as potential wound dressings. Then the temperature sensitivity, hemostatic ability, antibacterial activity, and sustained drug release effect of the hydrogels were investigated to evaluate their multifunctionality as wound dressings. Finally, the effect of QCS concentration on hydrogel properties was explored. The results show that the composite hydrogels have significant hemostatic, antibacterial, and sustained drug release abilities, and they can be rapidly transformed into a gel state and adhere to skin upon reaching body temperature. In addition, the properties of the hydrogels can be adjusted by varying the concentration of QCS, which allows for the preparation of wound dressings that are responsive to needs. Therefore, multifunctional QCS/F127 hydrogels with temperatureresponse characteristics are of great clinical research value as wound dressings.

关键词： Thermosensitive hydrogel Wound dressing Antibacterial activity Hemostasis Drug delivery

An Integrated Cyber-Physical Simulation Environment for Smart Grid Applications

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Tsinghua Science and Technology 2014年第2期19卷 133-143页

作者： Yuxin Wan Junwei Cao Shuqing Zhang Guoyu Tu Chao Lu xingtao xu Keqin Li the Department of Automation Research Institute of Information TechnologyTsinghua National Laboratory for Information Science and TechnologyTsinghua University the Department of Electrical Engineering Tsinghua University State Grid Jiangsu Electric Power Company Department of Computer Science State University of New York New Paltz

The concept of Cyber-Physical Systems （CPSs）, which combine computation, networking, and physical processes, is considered to be beneficial to smart grid applications. This study presents an integrated simulation environment to provide a unified platform for the investigation of smart grid applications involving power grid monitoring, communication, and control. In contrast to the existing approaches, this environment allows the network simulator to operate independently, importing its results to the power system simulation. This resolves conflicts between discrete event simulation and continuous simulation. In addition, several data compensation methods are proposed and investigated under different network delay conditions. A case study of wide-area monitoring and control is provided, and the efficiency of the proposed simulation framework has been evaluated based on the experimental results.

关键词： control cyber-physical system simulation smart grid wide-area monitoring

Kelp-derived porous carbon for capacitive deionization: Trade-off effect of activation temperature

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Progress in Natural Science:Materials International 2024年第5期34卷 907-912页

作者： Changle Li Shiwei Sun Wenjie Wu Dan Luo Kaidan Zheng Zhibin Pang Zeinhom M.El-Bahy Zhengtong Li xingtao xu Marine Science and Technology College Zhejiang Ocean University Key Laboratory of Xinjiang Coal Resources Green Mining Ministry of Education Xinjiang Institute of Engineering Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education College of Chemistry and Chemical Engineering Ocean University of China Department of Chemistry Faculty of Science Al-Azhar University State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Yangtze Institute for Conservation and Development Hohai University

In this paper, a series of kelp-derived porous carbon（KPC） materials were prepared from kelp by using a pyrolysisactivation method, where KOH with a fixed ratio was applied as the activator under varying activation temperature. Eventually, the KPC-based capacitive deionization（CDI） system showed excellent desalination performance, and the desalination capacity of KPC with an activation temperature of 800°C was highest, reaching 51.33 mgNaClg-1at 1.2 V. This work implies the trade-off effect of the activation temperature for the preparation and application of biomass-derived carbon materials, and provides some insights for carbon-based CDI materials.

关键词： Activation temperature Biomass-derived carbon Capacitive deionization Trade-off effect Water desalination

Facial synthesis of carbon nanotube interweaved FeOOH as chloride-insertion electrode for highly efficient faradic capacitive deionization

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Progress in Natural Science:Materials International 2024年第4期34卷 731-738页

作者： Lu Zhang Harry Lye Hin Chong Dan Luo Salah M.El-Bahy Pak Yan Moh xingtao xu Zeinhom M.El-Bahy Environmental Science Programme Faculty of Science and Natural Resources Universiti Malaysia Sabah Water Research Unit Faculty of Science and Natural Resources Universiti Malaysia Sabah Marine Science and Technology College Zhejiang Ocean University Department of Chemistry Turabah University College Taif University Department of Chemistry Faculty of Science Al-Azhar University

Faradic-based capacitive deionization（FDI） has been widely acknowledged as one of the most promising desalination techniques to solve the freshwater crisis, yet was largely limited by heavily trailed development of its anode materials, which subsequently hindered its desalination performance in terms of both desalination capacity and stability. Herein, we developed a new type of anode material for FDI by coupling chloride-insertion FeOOH with carbon nanotubes（CNTs@FeOOH）. The essence of this study lay in the composition of FeOOH with CNTs that could not only facilitate charge/electron transfer but also prevent structural aggregation. Consequently, the CNTs@FeOOH-based FDI system displays excellent desalination performance(desalination capacity: 50.36 mg g-1; desalination rate: 0.41 mg g-1s-1) with robust long-term stability（13.86 % reduction over 80 cycles）, which could motivate the future development of other highly-efficient desalination systems.

关键词： Capacitive deionization Carbon nanotube Faradic capacitive deionization FeOOH

New paradigms of water-enabled electrical energy generation

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SusMat 2024年第3期4卷 73-103页

作者： Zhengtong Li Tao Yang Jia-Han Zhang Taotao Meng Saad Melhi Jungmok You Miharu Eguchi Likun Pan Yusuke Yamauchi xingtao xu The National Key Laboratory ofWater Disaster Prevention Yangtze Institute for Conservation and DevelopmentState Key Laboratory of Hydrology-Water Resources and Hydraulic EngineeringHohai UniversityNanjingChina School of Electronic Information Engineering Inner Mongolia UniversityHohhotChina Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and EngineeringNanjing UniversityNanjingChina College of Materials Science and Engineering Nanjing Forestry UniversityNanjingChina Department of Chemistry College of ScienceUniversity of BishaBishaSaudi Arabia Department of Plant&Environmental New Resources College of Life SciencesKyung Hee UniversityYongin-siGyeonggi-doSouth Korea Department of Applied Chemistry School of Advanced Science and EngineeringWaseda UniversityShinjuku-kuTokyoJapan Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghaiChina School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology(AIBN) The University of QueenslandBrisbaneQueenslandAustralia Department of Materials Process Engineering Graduate School of EngineeringNagoya UniversityNagoyaJapan Marine Science and Technology College Zhejiang Ocean UniversityZhoushanZhejiangChina

Nanotechnology-inspired small-sized water-enabled electricity generation(WEG)has sparked widespread research interest,especially when applied as an electricity source for off-grid low-power electronic equipment and ***,WEG encompasses a wide range of physical phenomena,generator structures,and power generation ***,a systematic framework to clearly describe the connections and differences between these technologies is *** this review,a comprehensive overview of generator technologies and the typical mechanisms for harvesting water energy is *** the different roles of water inWEG processes,the related technologies are presented as two different ***,a detailed analysis of the electrical potential formation in each WEG process is presented,and their similarities and differences are ***,a comprehensive compilation of advanced generator architectures and system designs based on hydrological cycle processes is presented,along with their respective energy *** nanotechnology-inspired small-sized WEG devices show considerable potential for applications in the Internet of Things ecosystem(i.e.,microelectronic devices,integrated circuits,and smart clothing).Finally,the prospects and future challenges of WEG devices are also summarized.

关键词： electricity generation mechanisms Internet of Things multi-angle generator systems smallsized generators water-enabled electricity generation

高压大容量D-STATCOM主电路的比较与分析

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电力自动化设备 2011年第6期31卷 50-55页

作者：杨振宇许胜许杏桃江苏省电力公司生产技术部江苏南京210024 常州供电公司变电运行中心江苏常州213003 江南大学物联网工程学院江苏无锡214122 江苏安方电力科技有限公司江苏泰州225300

分析了现有典型高压大容量D-STATCOM的电路结构,特别比较了链式结构中△链和Y链各自的优劣。构建了一种背靠背H桥链节的Y链主电路,该结构具有能量可双向流动、链节直流电压由整流H桥单独控制、便于采用n+1冗余策略及便于高压大容量扩展... 详细信息

分析了现有典型高压大容量D-STATCOM的电路结构,特别比较了链式结构中△链和Y链各自的优劣。构建了一种背靠背H桥链节的Y链主电路,该结构具有能量可双向流动、链节直流电压由整流H桥单独控制、便于采用n+1冗余策略及便于高压大容量扩展等优点。给出了基于αβ坐标变换的Ip-Iq电流型补偿策略和故障链节旁路的容错控制,以及故障链节旁路后避免不同相之间的最小采样间隔的CPS-SPWM的调整算法。对5链节串联1.14 kV/100 kV.A样机进行了不对称负荷补偿实验和故障链节旁路容错实验,实验结果验证了所提结构和控制算法的正确性和有效性。

关键词： D-STATCOM Y链中性点偏移故障容错

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地区电网无功电压优化运行与安全控制

电力建设 2004年第12期25卷 36-38,41页

作者：许杏桃泰州供电公司江苏省泰州市225300

泰州供电公司利用调度自动化“四遥”功能 ,开发了“泰州城区电网无功电压优化运行集中控制系统”。它可以进行电网无功电压优化运行实时闭环控制 ,实现无功补偿设备投入合理和无功分层就地平衡与稳定电压、主变分接开关调节次数最少和... 详细信息

泰州供电公司利用调度自动化“四遥”功能 ,开发了“泰州城区电网无功电压优化运行集中控制系统”。它可以进行电网无功电压优化运行实时闭环控制 ,实现无功补偿设备投入合理和无功分层就地平衡与稳定电压、主变分接开关调节次数最少和电压合格率最高、输电网损率最小 ,从而进一步提高电网调度自动化水平。采用该系统可产生巨大的经济效益和社会效益。

关键词：电网无功补偿优化运行 “四遥”功能

改进型级联H桥型DSTATCOM装置n+1冗余容错控制策略

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电力自动化设备 2010年第7期30卷 54-59页

作者：许胜赵剑锋许杏桃东南大学电气工程学院江苏南京210096 泰州市供电公司江苏泰州225300

基于单位功率因数四象限H桥整流器的直流电容电压的均衡控制方法,提出了一种应用在级联H桥型DSTATCOM装置中的改进型n+1冗余容错控制策略。该策略采用实时调节故障相中非故障单元直流侧电容电压的方法,来保证装置故障后的正常运行。其... 详细信息

基于单位功率因数四象限H桥整流器的直流电容电压的均衡控制方法,提出了一种应用在级联H桥型DSTATCOM装置中的改进型n+1冗余容错控制策略。该策略采用实时调节故障相中非故障单元直流侧电容电压的方法,来保证装置故障后的正常运行。其主要特点是故障相在故障前后各功率单元的直流侧电压不相同,根据装置运行容量要求在故障后作相应的调整,从而在装置正常工作时,能够有效提高各功率单元的直流侧电压利用率,降低功率器件的开关损耗、du/dt以及故障率。此外,为了保持装置的CPS-SPWM输出电压在故障前后良好的谐波特性,采用调整故障相载波频率的方法,对该相非故障单元的CPS-SPWM脉冲生成时序作了相应的调整。实验结果表明,采用该故障容错控制策略,当装置出现冗余度以内的功率单元故障时,装置能够及时调整故障相输出功率,装置的补偿性能在故障后不受影响。

关键词：级联H桥型变流器 DSTATCOM n+1冗余故障容错 CPS-SPWM 谐波特性

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谐波分析及谐振评估软件的开发与应用

电力自动化设备 2009年第4期29卷 126-130页

作者：蒋平罗曦顾伟许杏桃东南大学电气工程学院江苏南京210096 泰州供电公司江苏秦州225300

结合模态分析法和谐波潮流算法,基于C#和Matlab语言开发出一套谐波分析及谐振评估软件。除一般的谐波分析功能外,软件还具有2个特色功能:通过频率扫描能搜索出系统中所有的谐振点,对谐振点进行模态分析,得到系统中发生谐振的严重区域,... 详细信息

结合模态分析法和谐波潮流算法,基于C#和Matlab语言开发出一套谐波分析及谐振评估软件。除一般的谐波分析功能外,软件还具有2个特色功能:通过频率扫描能搜索出系统中所有的谐振点,对谐振点进行模态分析,得到系统中发生谐振的严重区域,并以参与因子指标反映谐振在系统中的分布;对加入滤波器后的系统进行频率扫描,若系统谐振点次数与谐波源次数相近,则重新调整滤波器参数,经反复调整与扫描直至系统谐振点次数不与谐波源次数相近,实现滤波器参数的优化设计,解决由于其参数设计不恰当而引起的谐波谐振或谐波放大问题。算例仿真结果表明该方法对谐波谐振评估以及无源滤波器参数优化是正确、有效的。

关键词：谐波模态分析谐振评估无源滤波器参数优化