用碳纳米管制备导电性压敏胶粘剂

碳纳米管(CNTs)是一种导电材料,通过简单混合或超声波处理,可以在聚氨酯和丙烯酸酯溶剂型压敏胶粘剂及丙烯酸酯乳液型压敏胶粘剂中添加单层CNTs(SWCNTs)或多层CNTs(MWCNTs)。研究CNTs的分散性能与胶粘剂导电性能的关系。结果表明,MWCNTs的表面自由能对其分散性能和溶剂型压敏胶粘剂的导电性能有很大影响,乳液粒子直径对添加SWCNTs的乳液型压敏胶粘剂导电性能影响很大。     

橡胶/炭黑复合材料的压敏性和时间响应性

以炭黑（Ｎ３３０,Ｎ５５０）为导电相,橡胶（ＮＲ,ＥＰＤＭ,ＮＢＲ）为基质制备压敏导电复合材料。研究了复合材料的压敏性和不同压力条件下复合材料的时间响应性,讨论了对复合材料性能和压敏性的影响。     

导电橡胶的压敏性和热敏性研究*

研究了用炭黑Ｎ２９３,Ｎ３３０和Ｎ５５０作导电填料的ＮＲ,ＮＢＲ和ＥＰＤＭ导电橡胶的压敏性和热敏性。结果得出,用高结构、小粒径的炭黑Ｎ２９３作导电填料的ＮＲ,ＮＢＲ和ＥＰＤＭ导电橡胶,压敏性和热敏性均差;用中等结构、较大粒径的炭黑Ｎ５５０作导电填料的ＮＲ和ＥＰＤＭ导电橡胶,压敏性较好,热敏性较差;用中等结构、中等粒径的炭黑Ｎ３３０作导电填料的ＮＢＲ导电橡胶压敏性较好,在一定压力范围内热敏性也较好     

ZnO压敏陶瓷的晶界行为

晶界的结构、组成、性能以及相之间的界面与氧化锌压敏陶瓷的非线性、电性能、老化、化学性能方面有着重要联系。本文就ZnO压敏陶瓷的晶界行为以及工艺技术对晶界的影响因素进行了讨论 ,分析了关于ZnO压敏陶瓷导电、老化的晶界机理 ,大量研究表明 ,其多种特性均为晶界现象。     

尼龙接地放线滑车用导电橡胶研究

介绍了邻近带电线路架线施工用接地放线滑车和导电橡胶的现状,结合滑轮基本要求和架线施工要求,研究出一种压敏导电橡胶,该导电橡胶以氯丁橡胶为基础材料、炭黑为主要填充物,并进行了样品试制和性能测试,通过对试验结果的分析,该课题研究的导电橡胶完全适用尼龙接地放线滑车.     

分散剂对石墨烯水泥基复合材料压敏性能的影响研究

石墨烯能显著改善水泥基复合材料的压敏性能,而分散剂是影响石墨烯分散以及复合材料性能的关键因素。本文通过紫外分光光度仪、超景深显微镜、激光粒度仪及Zeta电位测试,研究了聚羧酸减水剂(PCE)、聚氧乙烯(20)山梨醇酐单月桂酸酯(TW-20)、十二烷基磺酸钠(SDS)、十二烷基苯磺酸钠(SDBS)4种分散剂对石墨烯分散性能的影响,并通过直流二电极、直流四电极和交流二电极测试研究了4种分散剂对石墨烯水泥基复合材料导电性能和压敏性能的影响。结果表明:在去离子水和水泥孔溶液中,PCE由于静电斥力和空间位阻的协同作用,对石墨烯具有良好的分散性;而在水泥孔溶液中,TW-20、SDS、SDBS与Ca²⁺之间的络合作用导致分散效率显著下降。石墨烯水泥基复合材料的导电和压敏性能与石墨烯在水泥基体中的分散性密切相关,掺PCE的石墨烯水泥基复合材料的电阻率最小,压敏性能最优。另外,SDS、SDBS的引气作用也会影响水泥基体的孔结构,导致电阻率增大,压敏性变差。     

导电橡胶及其应用

介绍了导电橡胶的导电机理和应用。导电机理主要有宏观渗滤理论即导电通路机理和量子力学隧道效应理论；导电橡胶主要有等向性导电橡胶、异向性导电橡胶、压敏导电橡胶、电磁屏蔽用导电橡胶和抗静电导电橡胶等。     

石墨烯改性水泥砂浆导电性能和压敏性能研究

采用Hummers法制备氧化石墨烯(GO),并经过800℃高温还原制备石墨烯(RGO)。采用TEM、FTIR微观手段对其结构进行表征。并将其应用在水泥砂浆中,研究不同掺量石墨烯改性水泥砂浆的导电性能和压敏性能的影响。研究结果表明,在水化早期,石墨烯对水泥砂浆的导电增强作用不明显,但在水化后期,石墨烯能大大增加水泥砂浆的导电性。水泥砂浆的导电性随着薄层石墨掺量的增加呈现先增加后减小的趋势,增加水泥基材料导电性的较佳掺量为0.9%;并且,石墨烯改性水泥砂浆具有明显的压力依赖性,在受到压应力时,表现出明显的压敏特性。     

橡胶材料在压敏型电缆传感器上的应用

文中介绍了用橡胶材料制造的压敏型电缆传感器。这种传感器上有正负电极。当压敏传感器在外力作用下发生变形引起一对电极相互接触时,传感器便进入‘ON’状态。该传感器采用导电橡胶和绝缘橡胶两种橡胶材料。导电橡胶应具有低体积电阻率和高耐久性;绝缘橡胶则应具有良好的柔软性和耐久性。     

ZnO压敏陶瓷导电机理的发展与掺杂氧化物的作用

近20年来，有关ZnO压敏陶瓷研究方面的报道很多，本文从ZnO压敏陶瓷的导电机理及掺杂氧化物的作用方面进行了综合评述。     

氢化松香生产后期处理工艺试验报告

本研究利用导热油加热和真空水蒸气蒸馏工艺进行氢化松香后处理 ,提高了产品质量 ,同时降低了生产成本     

铟锡氧化物陶瓷靶的现状

详细论述了铟锡氧化物陶瓷靶(ITO陶瓷靶)的生产工艺性能要求 ,重点介绍了利用ITO陶瓷靶生产的电子溅射产品———ITO透明导电膜玻璃的应用前景。     

Developing technology for production of combined fibres for protective articles

The possibility of fabricating inhomogeneous conducting fibres for preparation of special clothing on the winding machine bench was demonstrated. The structure of a combined conducting fibre in which the necessary contact between the current-conducting intermediate product and contact conductor is attained was developed; it ensured electrical resistance of gloves of less than 30 Ω and a high breaking load. __________ Translated from Khimicheskie Volokna, No. 3, pp. 30–32, May–June, 2007.     

Influence of Mould Materials on the Morphological and Mechanical Properties of Injection‐Moulded Prototypes

The use of prototype moulds made with rapid tooling (RT)‐techniques offers the possibility to manufacture prototypes in the series process. Although the series material is used during injection moulding, the properties of the prototype are not identical with the product because of the varying surface qualities of the RT‐moulds and the different thermal conditions in the process. In this work, different RT‐techniques (resin casting, metal spraying, selective laser sintering, investment casting and keltooling) are investigated according to the morphological as well as the mechanical properties of injection‐moulded prototypes. The specimen are compared with parts that were injection‐moulded in a steel mould to realise a comparison between prototype and product. The thermal diffusivity of the analysed RT‐mould materials differs from one tenth of the value of steel up to seven times higher compared to steel. This leads to a different morphology of the prototype concerning the boundary layers and the spherulite size. A good heat conducting material (e. g. aluminium investment casting mould) causes thick boundary layers and small spherulites. In contrast, a rather insulating mould material (e. g. resin casting mould) results in thin boundary layers and large spherulites. The investigations show that the effect of a good heat conducting material can be achieved by using a lower mould temperature for badly conducting materials in the same way. The yield stress of the prototypes differs up to 20% from the mechanical properties of the product and is influenced by the spherulite size and the mould's surface quality. The prototype, moulded in a keltool mould, shows the best resemblance with the product.     

导电高聚物聚苯胺的开发应用

聚苯胺可应用于抗静电，电磁波屏蔽，防蚀，敏感元件有机晶体管，电致变色材料和微电子等领域，具有广阔的市场前景，目前国外已有ＰＡＮ的工业化产品，国内ＰＡＮ的研究开发尚处于实验阶段。     

稳定焦化二甲苯产品质量的措施

通过对焦化二甲苯组成的分析,找出了乙基苯和苯乙烯是二甲苯变色的主要有害杂质。试验结果表明：加酸量应控制在4.5%～5.0%,最佳洗涤温度为45～50℃,酸洗时间宜控制在7min以上。还可采用在产品中加入抗氧化剂、进行二次处理和水洗等措施稳定二甲苯产品质量。     

A novel method for synthesis of water‐soluble polypyrrole with horseradish peroxidase enzyme

A novel water‐soluble, conducting polypyrrole was synthesized by horseradish peroxidase (HRP), in the presence of sulfonated polystyrene, as a polyanionic template. The HRP is an effective catalyst for the oxidative polymerization of pyrrole in the presence of hydrogen peroxide at room temperature. The reaction is sensitive to solution pH and it is performed in pH 2 aqueous solutions. Polymerization of pyrrole by this biological route produced a conducting water‐soluble polypyrrole for the first time. The reaction is benign and in one pot, and the product requires minimal purification. The reversible redox activity of the polypyrrole displays a hystersis loop with pH changes. FT‐IR, UV‐vis absorption spectroscopy, and cyclic voltammetry are used in the characterization of the synthesized polypyrrole. These studies confirm the electroactive and conducting form of polypyrrole, similar to that which has been traditionally synthesized, chemically and electrochemically. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 254–258, 2004     

Comparative investigations of packed and fluidized bed electrodes with non-conducting and conducting particles

Current density-potential curves and the dependency of current density on flow velocity were measured for reaction systems which are controlled by diffusion in packed and fluidized bed electrodes with conducting and non-conducting particles. Analogous measurements were carried out with plane electrodes, and the corresponding dependencies of the current density factori _b/i_pl were determined. For bed electrodes with conducting particles, the current density factor can be approximately described as the product of a surface scale-up factor and a diffusion-controlled factor of the order of 5. Parallel to the current flow direction, the effectiveness of a bed electrode with conductive particles covers only a layer thickness of less than 1 cm. Maximum current densities are found with both conducting and non-conducting particles at flow velocities above the fluidization point.     

Simultaneous kinetic resolution of chiral propylene oxide and propylene glycol in a continuous reactive distillation column

Traditionally kinetic resolutions are conducted by batch processing to recover one of the desired enantiomers of the racemate, while the product formed by the resolution is discarded due to its low purity. However, chiral materials are economically valuable and simultaneously conducting the reaction and separation, using reactive distillation, allows for both a reactant enantiomer and a product enantiomer to be recovered in high enantiomeric excess and yield. A feasible design of a continuous reactive distillation column is presented which performs a simultaneous kinetic resolution of racemic propylene oxide to produce both enantiomerically-pure propylene oxide and propylene glycol.     

稀土气相扩渗法制备K_(0.5)WO_3钨青铜及其导电性的研究

采用气相扩渗稀土法,以取代型杂多酸盐K1[7Pb(CuW11O39)2]·30H2O为前躯体,制备了K0.5WO3钨青铜,利用IR、XRD、TG-DTA、XPS等手段对扩渗前后的物质进行了结构表征,结果表明前躯体的笼型Keggin结构已被破坏,扩渗后的主要产物是K0.5WO3。同时用四探针法和交流阻抗谱测试了扩渗前后物质的电导率,扩渗后样品的电导率σ=1.07×10-3s·cm-1,有望可作为固体电介质材料。