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聚吡咯微胶囊γ-Fe_(2)O_(3)的合成及在膨胀阻燃环氧树脂中的应用

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高分子材料科学与工程 2024年第5期40卷 47-55页

作者：张泽瑞龙邈天颜龙徐志胜中南大学防灾科学与安全技术研究所湖南长沙410075

以聚吡咯(PPy)微胶囊γ-Fe_(2)O_(3)得到的PPy-Fe_(2)O_(3)为协效剂、二氨基二苯甲烷改性聚磷酸铵(DDP)为阻燃剂制备了膨胀阻燃环氧树脂(EP)复合材料。结合极限氧指数(LOI)、UL94、热重分析、锥形量热仪及扫描电镜探究PPy-Fe_(2)O_(3)对... 详细信息

以聚吡咯(PPy)微胶囊γ-Fe_(2)O_(3)得到的PPy-Fe_(2)O_(3)为协效剂、二氨基二苯甲烷改性聚磷酸铵(DDP)为阻燃剂制备了膨胀阻燃环氧树脂(EP)复合材料。结合极限氧指数(LOI)、UL94、热重分析、锥形量热仪及扫描电镜探究PPy-Fe_(2)O_(3)对EP/DDP体系的阻燃性、热稳定性及成炭性能的影响。结果表明,PPy-Fe_(2)O_(3)的加入可增强EP/DDP体系的阻燃性能、抑烟性能及热稳定性。利用PPy-Fe_(2)O_(3)与DDP复配有助于形成更加致密和稳定的炭层结构以减少热释放和生烟量,其中添加0.2%PPy-Fe_(2)O_(3)与9.8%DDP可使EP复合材料的峰值热释放速率(PHRR)与峰值生烟速率(PSPR)分别下降12.3%与11.0%,并成功通过UL94 V-0级且具有35.5%的LOI值。热重分析表明,PPy-Fe_(2)O_(3)的加入显著提高了EP/DDP体系的热稳定性与成炭性能,其中含0.2%PPy-Fe_(2)O_(3)的EP复合材料在700℃时的残炭量达到32.0%。

关键词： γ-Fe_(2)O_(3) 聚吡咯环氧树脂阻燃性能微胶囊

基于计量经济学观察的山西城镇化动力机制实证研究

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山西高等学校社会科学学报 2013年第9期25卷 41-44页

作者：阎泽睿中北大学经济与管理学院山西太原030051

山西经济社会发展和转型跨越都离不开山西城镇化的发展,山西城镇化发展主要以山西城镇化率为衡量标准。基于2000-2011年山西省的时间序列数据,运用计量经济学观察的实证分析方法,得出目前工业化率和城镇固定资产投资是山西城镇化的动力... 详细信息

山西经济社会发展和转型跨越都离不开山西城镇化的发展,山西城镇化发展主要以山西城镇化率为衡量标准。基于2000-2011年山西省的时间序列数据,运用计量经济学观察的实证分析方法,得出目前工业化率和城镇固定资产投资是山西城镇化的动力机制。为使山西快速实现城镇化,应积极实施促进产业结构调整、加快工业产业集聚发展,加强城镇投资和城镇基础设施建设等城镇化战略。

关键词：山西城镇化动力机制计量经济学观察

Particle captured by a field-modulating vortex through dielectrophoresis force

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Chinese Physics B 2022年第3期31卷 382-391页

作者： Bing yan Bo Chen zerui Peng Yong-Liang Xiong School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China

In microfluidic technology, dielectrophoresis(DEP) is commonly used to manipulate particles. In this work, the fluid–particle interactions in a microfluidic system are investigated numerically by a finite difference method(FDM) for electric field distribution and a lattice Boltzmann method(LBM) for the fluid flow. In this system, efficient particle manipulation may be realized by combining DEP and field-modulating vortex. The influence of the density(ρ_(p)), radius(γ), and initial position of the particle in the y direction(y_(p0)), and the slip velocity(u_(0)) on the particle manipulation are studied systematically. It is found that compared with the particle without action of DEP force, the particle subjected to a DEP force may be captured by the vortex over a wider range of parameters. In the y direction, as ρ_(p) or γ increases, the particle can be captured more easily by the vortex since it is subjected to a stronger DEP force. When u_(0) is low, particle is more likely to be captured due to the vortex–particle interaction. Furthermore, the flow field around the particle is analyzed to explore the underlying mechanism. The results obtained in the present study may provide theoretical support for engineering applications of field-controlled vortices to manipulate particles.

关键词： field-modulating vortex dielectrophoresis fluid–particle interactions

Solvent sieving separators implement dual electrolyte for highvoltage lithium-metal batteries

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Nano Research 2023年第4期16卷 4901-4907页

作者： yan Liu Qianqian Liu Youran Hong Yifei Xu zerui Chen Wei Zhao Zhikun Hu Jiangwei Wang Hao Bin Wu School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Lithium-metal batteries(LMBs)based on high-voltage cathodes would deliver high specific energy density to meet the demand of future energy ***,developing liquid electrolytes with wide electrochemical window for high-energy LMBs is intrinsically ***,we demonstrate metal-organic framework-functionalized separators(PE@MOF)with solvent sieving capability that implement dual electrolyte for *** capability of PE@MOF separator to block the diffusion of liquid electrolytes has been *** PE@MOF separator notably suppresses solvents shuttling,enabling the independent optimization of cathode-electrolyte and anode-electrolyte *** adapting commercial carbonate and ether electrolytes on cathode and anode sides,respectively,robust cathode-electrolyte interphase(CEI)and solid electrolyte interface(SEI)have been built on both *** lifespan of LiCoO_(2)(LCO)|Li full cell has been notably extended when using dual electrolyte and the solvent-sieving PE@MOF *** work demonstrates a new strategy to separately optimize the local environments at electrodes and to develop high-energy LMBs using low-cost and commercially available electrolytes.

关键词： dual electrolyte metal-organic framework lithium metal battery

A networked remote sensing system for on-road vehicle emission monitoring

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Science China(Information Sciences) 2017年第4期60卷 224-231页

作者： Yu KANG yan DING zerui LI yang CAO Yunbo ZHAO State Key Laboratory of Fire Science University of Science and Technology of China Department of Automation University of Science and Technology of China Institute of Advanced Technology University of Science and Technology of China Chinese Research Academy of Environmental Sciences College of Information Engineering Zhejiang University of Technology

Vehicle emissions are a major source of urban air pollution, and therefore a real-time monitoring system can be very useful in analyzing such emission and consequently assisting the policy making process. In this work we discuss the principle and structure of three different types of remote sensing detectors, and also the key techniques to establish a networked remote sensing monitoring system. We finally conclude this paper with data analysis from some preliminary experiments.

关键词： networked system remote sensing vehicle emissions

Effect of Joule heating on the electroosmotic microvortex and dielectrophoretic particle separation controlled by local electric field

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Chinese Physics B 2021年第11期30卷 401-410页

作者： Bing yan Bo Chen Yongliang Xiong zerui Peng School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China

Dielectrophoresis(DEP)technology has become important application of microfluidic technology to manipulate *** using a local modulating electric field to control the combination of electroosmotic microvortices and DEP,our group proposed a device using a direct current(DC)electric field to achieve continuous particle *** this paper,the influence of the Joule heating effect on the continuous separation of particles is *** show that the Joule heating effect is caused by the local electric field,and the Joule heating effect caused by adjusting the modulating voltage is more significant than that by driving ***,a non-uniform temperature distribution exists in the channel due to the Joule heating effect,and the temperature is the highest at the midpoint of the modulating *** channel flux can be enhanced,and the enhancement of both the channel flux and temperature is more obvious for a stronger Joule heating *** addition,the ability of the vortices to trap particles is enhanced since a larger DEP force is exerted on the particles with the Joule heating effect;and the ability of the vortex to capture particles is stronger with a stronger Joule heating *** separation efficiency can also be increased because perfect separation is achieved at a higher channel *** optimization of the separation device,such as the convective heat transfer coefficient of the channel wall,the length of modulating electrode,and the width of the channel,is performed.

关键词： dielectrophoresis microvortices Joule heating effect particle separation

Interfacial degradation mechanism of the polymer:fullerene bis-adduct solar cells and their stability improvement

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Interfacial degradation mechanism of the polymer:fullerene b...

A Widely Applicable Method for Plant Genomic DNA Extraction

第七届新型太阳能电池材料科学与技术学术研讨会

作者： Lingpeng yan Huimin Gu zerui Li Yongzhen yang Chang-Qi Ma Printed Electronics Research Center Suzhou Institute of Nano-Tech and Nano-Bionics(CAS)Chinese Academy of Sciences Institute of New Carbon Materials Taiyuan University of Technology Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of Technology Printed Electronics Research Center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences(CAS)

Although fullerene bis-adducts have been widely used in tandem and ternary polymer solar cells for their high LUMO energy level and good performance,the degradation behavior of this class of solar cells has not been well *** this paper,performance and stability of the solar cells based on P3HT:fullerene bis-adducts,including bis-PCBM and ICBA,were systematically *** from the P3HT:PCBM cell,these bis-adduct based cells showed fast open circuit(VOC) and fill factor(FF) *** investigating the degradation behavior of P3 HT:fullerene bis-adduct solar cells,we revealed that the interfacial degradation between P3HT and MoO is the main reason for fast VOC and FF decays,which can be suppressed by inserting a thin C layer or doping with *** work gives a detailed understanding of the interfacial degradation of PSCs and provides effective solutions,which has important guiding significance for improving the stability of different types of polymer solar cells.

关键词： polymer solar cell fullerene bis-adduct stability

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Agricultural Biotechnology 2012年第1期1卷 29-30页

作者： Bin LI Lixia YU Junjun XI Yaping ZHANG zerui GAO Bo yan Southwest Forestry University Yunnan Academy of Tobacco Science

[Objective] This study aimed to explore a method for plant genomic DNA extraction, to provide guidance for rapid extraction of genomic DNA from plant tissues. [ Method] Based on the published genomic DNA extraction methods, operation steps, reagent amount and processing time of SDS extraction method were optimized. [Result] A widely applicable method was established initially for genomic DNA extraction from various varieties of plants and various kinds of plant tissues. Quality of the extracted genomic DNA was relatively good, which meets the requirements for further operation. [ Conclusion] This study provided guidance for rapid plant genomic DNA extraction.

关键词： Plant genome DNA extraetion Optimized SDS extraction method

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延安市医学生健康危险行为及其影响因素

延安大学学报（医学科学版） 2022年第3期20卷 89-95页

作者：李艳栗慧钟泽锐延安市人民医院科教科陕西延安716000 西安交通大学医学部公共卫生学院陕西西安710049 自贡市卫生健康委员会四川自贡643000

目的了解延安市医学生健康危险行为现况及其影响因素,为进一步改善医学生健康状况提供科学依据。方法通过分层整群抽样法抽取延安市某大学共计1103名医学生,借助《中国青少年健康行为调查问卷》(高中和大学版)进行匿名调查,并利用χ^(2... 详细信息

目的了解延安市医学生健康危险行为现况及其影响因素,为进一步改善医学生健康状况提供科学依据。方法通过分层整群抽样法抽取延安市某大学共计1103名医学生,借助《中国青少年健康行为调查问卷》(高中和大学版)进行匿名调查,并利用χ^(2)检验、二元logistic回归分析法分析各维度健康危险行为的影响因素。结果参与调查的医学生健康危险行为中不良饮食行为、缺乏锻炼行为和故意伤害行为的发生率较高,分别占比为66.6%、44.2%和51.5%。单因素分析中,性别、年级、自评学习成绩、BMI、缺乏锻炼、自杀意念、自杀未遂、离家出走意念、孤独感、饮酒成瘾、被欺负和吸烟成瘾等均是健康危险行为的影响因素(P<0.05);二元logistic回归结果显示,性别是不良饮食行为、缺乏锻炼行为的影响因素;BMI是不良饮食行为、物质成瘾行为的影响因素;饮酒成瘾是缺乏锻炼行为、非故意伤害行为的影响因素;吸烟成瘾是伤害行为、精神成瘾行为的影响因素,自杀未遂、网络成瘾和故意伤害行为是不良性行为的影响因素。结论健康危险行为在延安市医学生中普遍存在,应当引起重视,要提高医学生健康危险行为意识,注重养成良好的生活习惯,从而改善群体健康水平。

关键词：延安市医学生健康危险行为影响因素