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Waterborne Epoxy Nanocoatings Modified by Nanoemulsions and Nanoparticles

Journal of Materials Science & Technology 2014年第10期30卷 1036-1042页

作者： Zhenyu Wang Enhou Han Fuchun Liu Zhouhai Qian Liwei Zhu State Key Laboratory for Corrosion and Protection Institute of Metal ResearchChinese Academy of Sciences Electric Power Research Institute of Zhejiang Electric Power Corporation

Electrically conductive coatings are required for static charge dissipation in power ground network. In the present investigation electrically conductive nanocoatings were prepared by the incorporation of graphite, nano-SiO2 concentrate, acrylic nanoemulsion and fluorocarbon emulsion onto the waterborne epoxy polymer. The nanosize distribution of nano-SiO2 concentrate and nanoemulsion was characterized with laser diffraction analyzer and scanning electron microscopy （SEM）. From the results of SEM image, the graphite particles were well distributed in conductive coating. The corrosion resistance and thermal stability of nanocoatings were comparatively studied by SEM and thermogravimetry （TG）. The corrosion-inhibiting properties of the conductive nanocoatings were investigated by salt immersion test. The measurements of contact angle, bonding strength and heat-freeze charge demonstrated that 1.5-2.0 wt% nanoparticles improve the resistance to pollution, adherence and resistance to heat-freeze charge of conductive nanocoatings. The measured results of surface electric resistance of nanocoatings demonstrated that a small amount of nano- SiO2 particles could enhance the conductivity in the corrosive environment.

关键词： Waterborne conductive nanoeoatings Corrosion resistance conductive properties Graphite filler Ground network

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维普期刊数据库

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Coexistence of Magnetism and Conductivity in Bis（ethylenediseleno） Tetrathiafulvalene （BEST） with Octahedral Anions Hexacyanoferrate （Ⅲ） and Nitroprusside

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Communications in Theoretical Physics 2005年第1期43卷 187-192页

作者： ZOUWei-Dong LIUZu—Li WUMing-Hu YAOKai-Lun DepartmentofPhysics HuazhongUniversityofScienceandTechnologyWuhan430074，China／／DepartmentofPhysicsXianningTeachersCollegeXianning437005China DepartmentofPhysics HuazhongUniversityofScienceandTechnologyWuhan430074China DepartmentofPhysics XianningTeachersCollegeXianning437005China

Using an accurate density-function method, we explore the coexistence of the magnetism and conductivity in bis(ethylenediselena)-tetrathiafulvalene (BEST) with the paramagnetic hexacyanoferrate(Ⅲ) [Fe(CN)6]3-or the photochromic nitroprusside anion [Fe(CN)5NO]2-. The total and partial densities of states, and the atomic spin magnetic moments are calculated and discussed. It is found that the up- and down-spin total densities of states (DOS)are continuous in the vicinity of the Fermi level, there is overlap between the HOMO and LUMO in the up-spin subbands and the down-spin subbands, which reveals that these types of compounds have conductive properties. From the total and partial densities of states and atomic spin magnetic moments, it is shown that the spin magnetic moments of (BEST)4[Fe(CN)6] is mainly assembled at the iron atom and the cyanogen radical, and the spontaneous magnetic moments for (BEST)2[Fe(CN)5NO] come from iron atom, cyanogen and nitric oxide radical. To our best knowledge, it is the first theoretical study on the coexistence of the magnetism and conductivity of these compounds.

关键词： magnetic properties conductive properties first-principles method

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维普期刊数据库

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Effect of Fe_(2)O_(3)nanoparticle on the interface microstructure and properties of Al/Cu plasma arc fusion-brazing joints

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China Welding 2023年第3期32卷 10-20页

作者：李岩杨楠樊丁黄健康张欢 Materials Science and Engineering College Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou 730050China

The lap joint of T2 copper plate and 1060 pure aluminum plate was made by using the plasma arc welding method with adding Fe_(2)O_(3)nanoparticles in different *** research analysis found that the thickness of the IMC(intermetallic compound)and eutect-ic region decreased after the addition of nanoparticles due to its inhibitory *** the proportion of Fe_(2)O_(3)nanoparticles is 3%,the in-terface intermetallic compound layer is the ***,after this ratio is continuously increased,the inhibition effect is weakened by the agglomeration of nanoparticles,and the thickness begins to increase *** mechanical and electrical properties of the joint are mainly affected by the thickness of the IMC *** nanoparticles are agglomerated into large particles with high ***,the tensile strength and relative electrical conductivity of the joint are first increasing and then decreasing with the increase of nanoparticle *** the proportion of nanoparticles is 3%,the tensile strength and electrical conductivity are maximum.

关键词： Aluminum-copper dissimilar metals Fe_(2)O_(3)nanoparticles intermetallic compound mechanical properties conductive properties

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维普期刊数据库

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异氮杂茚自由基改性聚噻吩及其导电性能

异氮杂茚自由基改性聚噻吩及其导电性能

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2014年全国高分子材料科学与工程研讨会

作者：沈艳春翟马跃雷玉鄢国平武汉工程大学材料科学与工程学院

＜正＞导电聚噻吩（PTh）因具有类似芳香环的结构,有良好的环境稳定性、易于制备、掺杂后具有较高的导电性和发光性能等特点而备受关注。作为导电高分子材料的一种,聚噻吩还具有极其小的尺寸、丰富的潜在功能,导电能力可以从绝缘到接近... 详细信息

＜正＞导电聚噻吩（PTh）因具有类似芳香环的结构,有良好的环境稳定性、易于制备、掺杂后具有较高的导电性和发光性能等特点而备受关注。作为导电高分子材料的一种,聚噻吩还具有极其小的尺寸、丰富的潜在功能,导电能力可以从绝缘到接近金属范围内调控,并且经过加工还可以赋予材料以电学、光学及力学等特性。已广泛应用于不同领域,如薄膜晶体管,

关键词： Isoindoline nitroxides Polythiophene conductive properties Radical polymer

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