检索结果-南通市图书馆

Multifunctional Waterborne Polyurethane Nanocomposite Films with Remarkable Electromagnetic Interference Shielding,Electrothermal and Solarthermal Performances

引用

Chinese Journal of Polymer Science 2023年第2期41卷 267-277页

作者： Ming-Ke Xu Xin-Jie Luo Hao-Bin Zhang Yu Zhang Lulu Li Xin-Feng Zhou zhong-zhen Yu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing100029China State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China

To impart polymers with high electrical conductivity and satisfactory electromagnetic interference shielding efficiency,it is crucial to efficiently construct interconnecting networks of conductive nanofillers in polymer ***,on the basis of the three-dimensional(3D)skeleton and volume-exclusion effect of silane-modified tetra-needle ZnO(ST-ZnO)whiskers and the high conductivity of two-dimensional MXene nanosheets,multifunctional MXene/ST-ZnO/waterborne polyurethane(MTW)nanocomposite films are fabricated by coating of MXene on ST-ZnO followed by compounding with waterborne *** 3D four-needles of the whiskers facilitate the formation of an interconnecting network in the waterborne polyurethane matrix,while the coating of MXene efficiently makes the interconnecting network of the whiskers conductive at a low amount of the *** resultant MTW ternary nanocomposite film exhibits not only a high electrical conductivity of 4.8×10^(4)S/m,but also an excellent electromagnetic interference shielding effectiveness of over 70 dB in the X-band at a low thickness of 100µ*** addition,the ternary film also exhibits outstanding Joule heating performances with an equilibrium temperature of 113℃at a low driving voltage of 3 *** multifunctional nanocomposite films are promising for applications in portable and wearable electronics and flexible electromagnetic interference shielding devices.

关键词： Electrical conductivity Electromagnetic interference shielding Nanocomposite films Waterborne polyurethane MXene nanosheets

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A novel soluble polyamide containing xanthene structure and trifluoromethylphenoxy pendent

引用

Chinese Chemical Letters 2010年第2期21卷 242-244页

作者： Huang, zhen zhong Wan, Xue Mei Xiao, Hai Bo Sheng, Shou Ri Song, Cai Sheng Jiangxi Normal Univ Coll Chem & Chem Engn Nanchang 330022 Peoples R China

A novel polyamide containing xanthene structure and trifluoromethylphenoxy pendent was prepared from 9,9-bis[4-(4- aminophenoxy)phenyl]xanthene,a novel diamine with 2-(4-trifluoromethylphenoxy)terephthaloyl chloride,by the low temperature *** new polyamide with the inherent viscosity of 0.95 dL/g was amorphous and readily soluble in polar solvents such as DMAc,m-cresol,*** polyamide showed the glass transition temperature(T_g) of 236℃,decomposition temperature (Td) at 5%weight loss of...

关键词： Polyamide Xanthene cardo group:Trifluoromethylphenoxy pendent Soluble

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis and insecticidal activities of novel bridged-neonicotinoids

引用

Chinese Chemical Letters 2017年第8期28卷 1743-1745页

作者： Dong-Dong Zhang Shu-Xia Cui Zhi-Ping Xu Dong-Mei Li zhong-zhen Tian Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials School of Chemistry and Chemical Engineering University of Jinan Shanghai Key Laboratory of Chemical Biology School of Pharmacy East China University of Science and Technology

A series of novel bridged-neonicotinoid analogues were designed and synthesized, which were constructed by starting material 8 with cyclopentenone or cyclohexenone in the presence of catalyst aluminium chloride. All of the compounds were characterized and confirmed by^1H NMR,^（13）C NMR, HRMS and IR. The bioassay tests showed that compounds 5 and 6a showed higher bioactivities than imidacloprid against Aphis craccivora.

关键词： Neonicotinoid Bridged compound Insecticidal activity Michael addition Resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Theoretical study of overstretching DNA–RNA hybrid duplex

引用

Chinese Physics B 2019年第6期28卷 477-485页

作者： Dong-Ni Yang zhen-Sheng zhong Wen-Zhao Liu Thitima Rujiralai Jie Ma School of Physics Sun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510006China Department of Chemistry Center of Excellence for Innovation in ChemistryFaculty of SciencePrince of Songkla UniversitySongkhla 90112Thailand

DNA–RNA hybrid(DRH) plays important roles in many biological processes. Here, we use a thermodynamic theory to analyze the free energy and unpeeling properties of the overstretching transition for the DRH molecule and compare the results with double-helix DNA. We report that the RNA strand of DRH is easier to get unpeeled than the DNA strand while the difficulty in unpeeling the double helix DNA lies in between. We also investigate the sequence effect, such as GC content and purine content, on the properties of unpeeling the DRH. Further, to study the temperature effect, the forcetemperature phase diagram of DRH and DNA are calculated and compared. Finally, using a kinetic model, we calculate the force–extension curves in the DRH stretching and relaxation process under different pulling rates and temperatures. Our results show that both pulling rate and temperature have important influences on the stretching and relaxation kinetics of unpeeling the DRH. Putting all these results together, our work provides a comprehensive view of both the thermodynamics and kinetics in DRH overstretching.

关键词： DNA–RNA hybrid mechanical properties overstretching thermodynamic and kinetic model

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Two-dimensional mesoporous materials:From fragile coatings to flexible membranes

引用

Chinese Chemical Letters 2013年第2期24卷 89-92页

作者： zheng-Long Yang Jiao-Li Li Cheng-Liang Zhang Yun-Feng Lu zhen-zhong Yang School of Chemistry and Materials Science Ludong University lnstitute of Chemistry Chinese Academy of Sciences Institute of Chemistry Chinese Academy of Sciences Department of Chemical and Biomolecular Engineering.University of California at Los Angeles Los AngelesCA 90095USA

Received 30 November 2012 Received in revised form 24 December 2012 Accepted 26 December 2012 Available online 29 January 2013

关键词： Mesoporous materialsTwo-dimensional materialsCoatingsMembranes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

New thermoelectric semiconductors Pb_(5)Sb_(12+x)Bi_(6-x)Se_(32) with ultralow thermal conductivity

引用

Chinese Journal of Structural Chemistry 2024年第3期43卷 33-40页

作者： Ruizhi Yang Xia Li Weiping Guo Zixuan Chen Hongwei Ming zhong-zhen Luo Zhigang Zou Key Laboratory of Advanced Materials Technologies International(Hong KongMacao and Taiwan)Joint Laboratory on Advanced Materials TechnologiesCollege of Materials Science and EngineeringFuzhou UniversityFuzhou350108China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou350116China Eco-materials and Renewable Energy Research Center College of Engineering and Applied SciencesNanjing UniversityNanjing210093China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing210093China

Five new semiconductors Pb_(5)Sb_(12+x)Bi_(6-x)Se_(32)(x=0,1,2,3,and 4)have been synthesized for the first time,which adopt pavonite-type structure and crystallize in monoclinic C2/m space *** crystal structure is composed of two different types of polyhedral ***-I is a galena-like structure motif that forms with[MSe_(6)](M=Pb,Sb,and Bi)octahedra and slab-Ⅱcontains one octahedral[MSe_(6)]block and paired squared pyramids[MSe_(5)].Pb_(5)Sb_(12+x)Bi_(6-x)Se_(32)exhibits n-type semiconductor behaviors and the remarkable Seebeck coefficient from-64.1μV K^(-1)for x=0 sample to-242μV K^(-1)forx=4 sample at 300 ***,the Pb_(5)Sb_(12)Bi_(6)Se_(32)has the highest carrier concentration of 1.35×10^(20)cm^(-3)in pavonite-type *** complex compositions,mixed occupancies of the cations,and quasi-two-dimensional structure lead to the low lattice thermal conduc-tivity(κ_(lat))less than 0.48 W m^(-1)K^(-1)from 300 to 723 K,at which Pb_(5)Sb_(16)Bi_(2)Se_(32)especially shows the ultralow value of 0.25 W m^(-1)K^(-1).As a result,the thermoelectric figure of merit,ZT~0.34 at 723 K,is obtained for the intrinsic Pb_(5)Sb_(12)Bi_(6)Se_(32).

关键词： Thermoelectric Semiconductors Pavonite-type structure Pb_(5)Sb_(12+x)Bi_(6-x)Se_(32) Mixed occupancies Ultralow thermal conductivity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Temperature Effects on Properties of Bi(2223) High Temperature Superconducting Tapes

引用

Chinese Physics Letters 2001年第5期18卷 677-679页

作者： WANG zheng-Dao CHEN Zhao-Jia DUAN zhen-zhong WANG Wen-Quan Cryogenic Laboratory Chinese Academy of SciencesBeijing 100080 Institute of Physics Chinese Academy of SciencesBeijing 100080 Northwest Institute for Non-Ferrous Metal Research Xi’an 710016 Beijing General Research Institute for Non-Ferrous Metals Beijing 100080

The critical current density Jc and n-value have been studied from 40 K to critical temperature for four types of Bi-system 2223 tapes with different *** experimental results demonstrate that the change of Jc can be divided into three parts and n-value has some decrease with a decrease in *** engineering application,a proper working temperature can be selected to satisfy the practical ***,the temperature effects on critical stress for Ag-sheath tape was also *** results demonstrate that the critical stress does not change monotonously with a decrease in *** increases first,then decreases with the further decrease in temperature.

关键词： temperature. stress critical

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Direct Ink Writing of Highly Conductive MXene Frames for Tunable Electromagnetic Interference Shielding and Electromagnetic Wave-Induced Thermochromism

引用

Nano-Micro Letters 2021年第10期13卷 14-28页

作者： Xinyu Wu Tingxiang Tu Yang Dai Pingping Tang Yu Zhang Zhiming Deng Lulu Li Hao-Bin Zhang zhong-zhen Yu State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China

The highly integrated and miniaturized next-generation electronic products call for high-performance electromagnetic interference(EMI)shielding materials to assure the normal operation of their closely assembled ***,the most current techniques are not adequate for the fabrication of shielding materials with programmable structure and controllable shielding ***,we demonstrate the direct ink writing of robust and highly conductive Ti3C2Tx MXene frames with customizable structures by using MXene/AlOOH inks for tunable EMI shielding and electromagnetic wave-induced thermochromism *** as-printed frames are reinforced by immersing in AlCl_(3)/HCl solution to remove the electrically insulating AlOOH nanoparticles,as well as cross-link the MXene sheets and fuse the filament interfaces with aluminum *** freeze-drying,the resultant robust and porous MXene frames exhibit tunable EMI shielding efficiencies in the range of 25-80 dB with the highest electrical conductivity of 5323 S m−***,an electromagnetic wave-induced thermochromic MXene pattern is assembled by coating and curing with thermochromic polydimethylsiloxane on a printed MXene pattern,and its color can be changed from blue to red under the high-intensity electromagnetic *** work demonstrates a direct ink printing of customizable EMI frames and patterns for tuning EMI shielding efficiency and visualizing electromagnetic waves.

关键词： MXene Electromagnetic interference shielding Direct ink writing Electrical conductivity Thermochromism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evolutionary analysis of plant jacalin-related lectins(JRLs)family and expression of rice JRLs in response toMagnaporthe oryzae

引用

Journal of Integrative Agriculture 2018年第6期17卷 1252-1266页

作者： HAN Yi-juan zhong zhen-hui SONG Lin-lin Olsson Stefan WANG Zong-hua LU Guo-dong State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/Key Laboratory of Biopesticide and Chemistry Biology Ministry of Education/College of Life ScienceFujian Agriculture and Forestry UniversityFuzhou 350002P.R.China

Jacalin-related lectins （JRLs） are widely distributed carbohydrate-binding proteins in the plant kingdom, which play key roles in development and pathogen defense. In this study, we profiled evolutionary trajectory of JRLs family in 30 plant species and identified domain diversification and recombination leading to different responsive patterns of JRLs in rice during defense against rice blast. All of 30 plant species analyzed in our study have two types of JRLs by containing either a single jacalin or repeated jacalin domains, while chimeric jacalins exist in more than half of the species, especially in the Poaceae family. Moreover, Poaceae species have evolved two types of unique chimeric JRLs by fusing the jacalin domain（s） with dirigent or NB_ARC domain, some of which positively regulate plant immunity. Seven Poaceae-specific JRLs are found in the rice genome. We further found expression of rice JRLs, including four Poaceae-specific JRLs, are induced by Magnaporthe oryzae infections at either early or late infection stages. Overall, the results present the evolutionary trajectory of JRLs in plant and highlight essential roles of Poaceae specific JRLs against pathogen attacks in rice.

关键词： jacalin-related lectins phylogeny Oryza sativa Magnaporthe oryzae infection responses

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Controlled Synthesis of Dendritic Polyaniline Fibers with Diameters from Nanosize to Submicrometersize

引用

Chinese Chemical Letters 2005年第11期16卷 1523-1526页

作者： Xiao Cong WANG Shu Jiang DING Jing CAO Fa Lun WU Chen ZHOU zhen zhong YANG College of Science Tianjin University of Science and Technology Tianjin 300022 State Key Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100080

Dendritic polyaniline nanofibers and submicrometer-sized fibers have been synthesized by chemical oxidative polymerization of aniline （An） doped with salicylic acid （SA）. The diameters of the fibers could be controlled easily from 30 to 400 nm by varying the concentration of aniline and salicylic acid at room temperature. Scanning electron microscopy （SEM） and typical transmission electron microscopy （TEM） were applied to investigate their morphologies. . Fourier transform infrared （FTIR） spectrum indicated that the state of the dendritic polyaniline fibers is emerialdine rather than solely the leucoemeraldine or permigraniline forms. The dendritic polyaniline fibers have potential applications as chemical sensors or actuators and neuron devices.

关键词： Dendritic polyaniline synthesis nanofiber.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：