炭黑在高分子聚合物中的导电性研究

以EVA为高分子聚合物，采用不同级别的导电炭黑，研究了导电炭黑填充高分子聚合物的导电性，讨论了不同级别和不同用量的导电炭黑在聚合物中的分散性，以及对高分子聚合物导电性的影响。实验结果表明，导电炭黑高分子聚合物的导电性主要取决于不同级别的导电炭黑的表面性和结构等特性、炭黑的不同用量以及导电炭黑的聚集体在高分子聚合物的分散程度。     

导电炭黑在抗静电聚合物中应用

将特殊的炭黑粒子均匀分散在聚合物基体中,能在一定温度范围内有效提高材料电阻值,可形成一种复合型导电高分子材料。本文综述了导电炭黑填充聚合物的研究进展,对影响复合材料的导电性能及因素进行了探讨。重点介绍了使用共混聚合物作基体,利用特种导电炭黑改善聚合材料的抗静电性的研究。     

炭黑在EVA中的导电性研究

以EVA为高分子聚合物,采用不同级别的导电炭黑,研究了导电炭黑填充高分子聚合物的导电性,讨论了不同级别和不同用量的导电炭黑在聚合物中的分散性,以及对高分子聚合物导电性的影响。实验结果表明,导电炭黑高分子聚合物的导电性主要取决于不同级别的导电炭黑的表面积和结构等特性、炭黑的不同用量以及导电炭黑的聚集体在高分子聚合物的分散程度。     

导电高分子材料研究现状及发展趋势

随着中国科学技术的迅速发展,出现了越来越多的新技术和新材料,为中国的科学事业做出了巨大的贡献。例如,近年来出现的导电聚合物材料,就是利用在高分子聚合物中加入了导电材料从而具有一定的导电作用。本文介绍了导电聚合物材料的类型,并总结了近年来的研究成果,并阐述了其在现实生活中的应用。并且分析了其在以后的发展趋势。希望这些分析能够提高导电高分子材料的实用性,增加其在生活中的使用,并对这种材料的新研究产生积极影响。     

共混复合型导电高分子材料研究进展

介绍了复合型导电高分子材料的概念及特点，重点讨论了共混复合型导电高分子材料的制备方法和影响共混复合型导电高分子材料导电性的主要因素。并对当前共混复合型导电高分子材料的应用及发展趋势作了简要介绍。     

产品开发

<正>可溶性导电聚合物开发前景好导电高分子材料是一种应用前景广阔、高附加值的新型材料,但其缺点是难溶、刚性大等,因而使其应用受到限制。可溶性导电聚合物可解决其溶解性和改善其加工性问题。这类可溶性导电聚合物包括聚吡咯、聚噻吩、聚苯胺及聚乙炔等,其研发和应用前景良好。印刷电子用无颗粒型导电胶成研发热点导电油墨是印刷电子材料中的关键材料之一,应用非常广     

导电高分子材料制备及应用研究进展

在介绍导电高分子材料导电机理的基础上,对目前最常见的两种导电高分子材料的制备方法进行综述;重点讨论了含大型离域π键导电高分子材料、化学掺杂型共轭结构导电高分子材料和新型本征导电高分子材料等本征型导电高分子材料的制备方法,并研究了金属及其氧化物、碳系纳米材料、有机组分以及新型导电填料等对填充型导电高分子材料导电性能的影响...     

填充型导电高分子材料的研究进展

简要介绍了导电聚合物的分类及特点．重点论述了填充型导电高分子材料的分类、导电机理以及提高其导电稳定性的方法,并对填充型导电复合材料的发展方向提出了建议。     

聚合物抗静电材料的研究与发展

论述了聚合物抗静电材料的研究现状,着重介绍在聚合物材料中添加表面活性剂或高分子型永久抗静电剂,以及在基体聚合物中填充无机导电填料或结构型导电聚合物的技术进展,并指出了聚合物抗静电材料的发展方向。     

碳纤维协同碳纳米管改性聚乳酸的性能研究

选用可完全生物降解的聚乳酸材料作为导电抗静电聚合物复合材料的基体,以阵列碳纳米管(CNT)为主要电介质,碳纤维(CF)为增强材料和辅助导电剂,采用熔融共混法制备生物降解导电高分子材料。研究表明,含2%碳纳米管的聚乳酸(PLA)表面电阻率可达到1010Ω/sq,即可达到抗静电材料的要求;添加1%的碳纤维(CF),制备成PLA/CNT/CF导电复合材料,碳纤维不但可以提高材料的导电性能,还显著改善材料的拉伸强度和冲击性能,导电性和冲击强度均提高了4倍。     

导热硅橡胶的研究进展

概述了导热硅橡胶的导热模型与导热机理;介绍了国内外导热硅橡胶的研制与开发情况,提出了提高硅橡胶导热性能的三种途径;阐述了导热硅橡胶的应用及发展方向。     

导热硅橡胶研究进展

概述了导热硅橡胶的导热机理和模型,介绍了改善硅橡胶导热性能的主要途径,阐述了导热硅橡胶的应用情况,并对其今后研究方向进行了展望。     

聚合物/石墨烯导热复合材料研究进展

综述了聚合物/石墨烯纳米片(GNPs)导热复合材料的最新研究进展,重点探讨了GNPs结构、表面功能化、核壳结构、混杂GNPs及协同效应,石墨烯泡沫以及复合材料的制备工艺等因素对聚合物热导率的影响及机理。最后总结和展望了聚合物/石墨烯导热复合材料当前面临的问题及未来研究方向。     

提高聚硅烷导电性能的途径

叙述了聚硅烷的特点，聚硅烷的导电机理以及提高聚硅烷导电性能的主要途径。提高聚硅烷导电性能的途径主要有接枝改性、化学掺杂和改善空间构型。     

六方氮化硼在绝缘导热聚合物复合材料中应用研究进展

本文介绍了六方氮化硼作为高导热、高绝缘性无机填料在聚合物中应用研究进展, 探讨了氮化硼在绝缘导热复合材料应用中的发展方向。     

Thermal conductivity of polymer-based composites: Fundamentals and applications

Thermal management is critical to the performance, lifetime, and reliability of electronic devices. With the miniaturization, integration and functionalization of electronics and the emergence of new applications such as light emitting diodes, thermal dissipation becomes a challenging problem. Addressing this challenge requires the development of novel polymer-based composite materials with enhanced thermal conductivity. In this review, the fundamental design principles of highly thermally conductive composites were discussed. The key factors influencing the thermal conductivity of polymers, such as chain structure, crystallinity, crystal form, orientation of polymer chains, and orientation of ordered domains in both thermoplastics and thermosets were addressed. The properties of thermally conductive fillers (carbon nanotubes, metal particles, and ceramic particles such as boron nitride or aluminum oxide) are summarized at length. The dependence of thermal conductivity of composites on the filler loading, filler aggregate morphology and overall composite structure is also discussed. Special attention is paid to recent advances in controlling the microstructure of polymer composites to achieve high thermal conductivity (novel approaches to control filler orientation, special design of filler agglomerates, formation of continuous filler network by self-assembly process, double percolation approach, etc.). The review also summarizes some emerging applications of thermally conductive polymer composites. Finally, we outline the challenges and outlook for thermally conductive polymer composites.     

Fabrication of conductive paper coated with PEDOT: preparation and characterization

Conductive polymers have been studied extensively because of their attractive physical properties, such as conductivity, luminescent performance, and dielectric property. Poly(3,4-ethylenedioxythiophene) (PEDOT) is one of the most employed conductive polymers for applications, such as a buffer layer of organic electroluminescent devices, due to its high conductivity and electrical stability. In this study, we fabricated a conductive paper coated with PEDOT by direct polymerization onto a paper sheet. The conductive paper exhibited the electrical conductivity of 1.8?S/cm. Scanning electron microscopy images of the conductive paper showed two structures: thin polymer membranes attached to cellulose fibers at the surfaces, and thick polymer sheets extended through the void spaces between the fibers in the inner layers. Consequently, strong interactions between the PEDOT and the cellulose fibers enhanced mechanical properties of the conductive paper. Electron probe X-ray microanalysis (EPMA) revealed distribution elemental maps of carbon, oxygen, sulfur, chlorine, and iron on the conductive paper.     

Irreversible and Self-Healing Electrically Conductive Hydrogels Made of Bio-Based Polymers

Electrically conductive materials that are fabricated based on natural polymers have seen significant interest in numerous applications, especially when advanced properties such as self-healing are introduced. In this article review, the hydrogels that are based on natural polymers containing electrically conductive medium were covered, while both irreversible and reversible cross-links are presented. Among the conductive media, a special focus was put on conductive polymers, such as polyaniline, polypyrrole, polyacetylene, and polythiophenes, which can be potentially synthesized from renewable resources. Preparation methods of the conductive irreversible hydrogels that are based on these conductive polymers were reported observing their electrical conductivity values by Siemens per centimeter (S/cm). Additionally, the self-healing systems that were already applied or applicable in electrically conductive hydrogels that are based on natural polymers were presented and classified based on non-covalent or covalent cross-links. The real-time healing, mechanical stability, and electrically conductive values were highlighted.     

Coordination polymers, 2. Effect of iodine doping on electrical properties of coordination polymers derived from terephthalaldehyde bis(S-benzyldithiocarbazate)

The electrical properties of Mn(II), Fe(II), Co(II), Ni(II), Cu(II), and Zn(II) chelate polymers of terephthalaldehyde bis(S-benzyldithiocarbazate) (TBDTC) have been studied. Similarly, different concentrations of iodine were doped to these chelate polymers to increase their conductivity for producing a new class of electrical conductive material. The current interest in doping of iodine in chelate polymers is to a great extent due to their possible application in power sources and electrochemical devices. Electrical conductivity of chelate polymers and iodine doped chelate polymers have been studied over a wide range of temperature (～ 300?450 K). From the electrical conductivity of these polymers activation energies of electrical conduction have been evaluated. A comparison of electrical conductivity and activation energy of electrical conduction of simple and iodine doped polymers has been made and conclusions about the role of iodine in chelate polymers regarding the electrical conductivity have been drawn.