导电涂料的研究现状及发展趋势

导电涂料是一种特种功能涂料。根据导电原理可分为添加型导电涂料和本征型导电涂料。本征型的导电涂料主要有聚苯胺型和聚吡咯型。添加性的导电涂料主要有碳系、金属系、金属氧化物系和复合类。本文主要介绍了各种导电涂料的发展现状,国内外的导电涂料发展概况,以及导电涂料的今后发展方向。     

导电涂料的研究进展

综述了导电涂料的主要特性和分类,重点介绍了本征型导电涂料、掺杂型导电涂料的研究,简介了导电涂料的应用情况,并指出了今后导电涂料的发展方向。     

导电涂料的研究现状及发展趋势

综述了国内外导电涂料的研究现状,展望了未来导电涂料的发展趋势。国外研制的本征型导电涂料主要集中在聚苯胺、聚乙炔、聚苯硫醚、聚吡咯、聚噻吩、聚喹啉等,研制性能优良的织物用导电涂料和纳米导电涂料也取得了进展。我国陆续研制出高性能的非碳系导电涂料。目前,添加型导电涂料是导电涂料的研究、开发以及工业化的重点．本征型导电涂料的探索和研究正处于初步阶段,高性价比和环保型导电涂料将成为发展方向。     

导电涂料的原理及其军事应用

讨论了本征型导电涂料和掺合型导电涂料的导电机理以及影响其导电性能的主要因素,介绍了各种功能型导电涂料在军事领域的应用.     

导电涂料的原理及其军事应用

讨论了本征型导电涂料和掺合型导电涂料的导电机理以及影响其导电性能的主要因素,介绍了各种功能型导电涂料在军事领域的应用。     

导电涂料应用研究现状与展望

导电涂料是一种特种功能涂料,是近年来随着涂料工业与现代工业的高速发展而出现的一种功能材料。本文主要综述了本征型导电涂料和掺杂型导电涂料的研究进展和应用现状,并根据导电材料化学成分不同,指出目前研制的碳系导电涂料、石墨导电涂料、金属系导电涂料、纳米管导电涂料、氧化物导电涂料的特点和性能,并且进行了比较分析。同时指出导电涂料作为导电使用的涂层,在电子工业、建筑工业以及航空技术等方面都具有重要的实用价值。     

产品开发

正本征态高分子导电防腐涂料成研发方向导电涂料在航天航空、军用工业、电子封装、建筑工程和石油化工等领域具有很高的实用价值。导电涂料可分为添加型导电涂料和本征型导电涂料两类。添加型导电涂料已工业化生产,本征型导电涂料尚处于研发阶段。以聚苯胺、聚吡咯和聚噻吩等导电高分子制备的本征态导电防腐涂料,无     

掺杂型聚苯胺导电涂料的研究

研制了一种以环氧树脂为基料,掺杂型聚苯胺为导电填料的导电涂料。研究了导电涂料中掺杂型聚苯胺以及聚酰胺类固化剂对导电涂料性能的影响,并对导电涂料的电阻率、柔韧性及附着力等性能进行了测试。结果表明,该涂料ρ为20~25Ω.cm,具有优良的导电性,且涂膜的柔韧性达到1.0mm。     

导电涂料（Ⅰ）

导电涂料是本世纪迅速发展、用途广泛的新的功能型涂料。本文介绍了导电涂料的理论基础与应用发展概况，并对添加型导电涂料机理进行了探讨。     

铜系电磁屏蔽涂料的研究

阐述了电磁屏蔽涂料的电磁屏蔽原理和导电机理;讨论了导电填料的填充量、形状、粒度和填充型导电涂料导电性能的关系;分析了偶联剂、镀覆金属、漆膜厚度及固化条件对导电涂料的导电性能的影响;提出了铜系导电涂料尚需解决的主要问题。     

Marine paint fomulations: Conducting polymers as anticorrosive additives

Within coating technology, there is increasing interest in the development of efficient anticorrosive additives able to replace the conventional inorganic anticorrosive pigments usually added to paints, which may have detrimental effects on both environment and health. A number of recent studies have evidenced that the modification of a paint formulation by the addition of a low concentration of conducting polymer (0.2–0.3%, w/w) increases significantly the protective properties of the coating. Here we focus on the principles of anticorrosive additives based on conducting polymers for marine paints. The article reviews the most important findings achieved in recent studies. The relevant factors that are determinant for the anticorrosive protection imparted by conducting polymers, as the doping level, the miscibility with paint, the electrochemical stability, etc., are discussed in detail.     

Conductive paints made from nickel-plated glass microspheres

It was found that modification of the surface of nickel-plated hollow glass microspheres with N-oxide-Cl-alkyldimethylamine causes overcharging of their surface and as a result improves wetting of particles of the solid phase with acrylic latex water-emulsion paint. The conductive paint coatings are characterized by high electrical conductivity. The paint developed can be used to protect people and equipment from electromagnetic radiation.     

Novel water based coatings containing some conducting polymers nanoparticles (CPNs) as corrosion inhibitors

A new type of anticorrosive water-based paints containing some conducting polymers nanoparticles (CPNs) such as poly anisidine (PAns), poly toluidine (PTol) and their copolymer (CCPNs) have been prepared and evaluated. The CPNs and CCPNs have been synthesized via miniemulsion polymerization. The prepared materials have been characterized by GPC, FTIR, TEM and DSC. The prepared CPNs and CCPNs of different weight percentages (wt.%) have been incorporated into paint formulations. It has been found that the presence of the prepared CPNs and CCPNs in the paint formulations highly enhanced the resistance of the formed paint films against washability, weathering and corrosion.     

An in situ phosphatizing coating on 2024 T3 aluminum coupons

Toxic chemicals, such as chrome, are commonly used in the application of conversion coatings to various metal surfaces. In situ phosphatizing coatings (ISPCs) are an innovative approach for eliminating the requirement of a conversion coating which ends the need of toxic materials used in a multi-step coating practice. An ISPC is formulated by predispersing an in situ phosphatizing reagent (ISPR) into a paint system. In this study, an ISPR, an arylphosphonic acid, is used in a polyester–melamine paint to react in situ with the metal surface and to provide the acidic catalyst needed, while thermally curing the paint. A second polyester–melamine paint system is used as the control that uses the standard catalyst para-toluenesulfonic acid (p-TSA) to catalyze the cross-linking reaction in the paint. These two paint systems are applied to bare 2024 T3 Al panels and to chromated 2024 T3 Al panels. The coated panels are treated in a corroding media for 2,400 h and monitored periodically using electrochemical impedance spectroscopy (EIS). Results of EIS data and the corresponding electrical equivalent circuit (EEC) show that the ISPC applied to both the chromated and untreated Al panels provide superior corrosion protection. At low frequency (0.01 Hz), the panels coated with the ISPC show 10 000 times more resistance than both the chromated and bare Al panels coated with the control polyester–melamine paint. The corresponding EEC shows that the panels with the control paint applied have double the amount of electrical components (resistors and constant phase elements). A physical interpretation is suggested for the EEC. The paint adhesion to the Al surface and the corrosion behavior are tested by salt-water immersion and salt fog. After the panels are exposed to the salt solution, a pressure tape is applied to test the adhesion. The results show that the ISPC applied on the chromated Al adheres the best. The simultaneous reaction of the ISPR catalyzing the curing of the paint and forming the metal–phosphate layer is the reason for the superior paint performance.     

In situ capacitance measurements for in-plane water vapor transport in paint films

A capacitance technique has been adapted to study in-plane water vapor transport in paint films. The technique requires an application of electrical contact materials on the paint film surface for capacitance measurements by electrochemical impedance spectroscopy (EIS). The capacitance obtained by EIS using Cu tape and Ag paste as the contact materials are presented. A direct comparison of capacitance and gravimetric measurements demonstrates that the change in the coating capacitance is quantitatively correlated with the total amount of in-plane water vapor transported in paint films. The water vapor diffusion coefficient derived from the capacitance technique agrees with one from the gravimetric method.     

PVC抗静电材料的研究

选用导电炭黑及热塑性聚氨酯弹性体(TPU)、丁腈橡胶(P83)等改性剂对聚氯乙烯(PVC)进行抗静电及增韧研究,测试及分析了PVC共混体系的电性能、机械性能及耐热性能。实验结果表明:添加一定量的导电炭黑能明显提高材料的抗静电性能,但其冲击性能也随导电炭黑加入量的增加而下降,通过加入改性剂可改善体系的韧性。PVC/炭黑/TPU体系具有较高的抗静电效果及综合性能。     

电磁屏蔽用导电涂料的研制

叙述了一种低成本、高抗氧化铜粉填料的制备方法。以及用该填料制造的导电涂料的组成、优良的耐老化性能和很好的屏蔽效果，并展望了铜粉填料的应用前景。     

Effects of Annealing Conditions of Electrodes on the Photovoltaic Properties of Sintered Cadmium Sulfide/Cadmium Telluride Solar Cells

Polycrystalline n -CdS/ p -CdTe solar cells with a commerical carbon paint on the p -CdTe layer and an In-Ag paint on the n -CdS layer were fabricated by a coating and sintering method. Electrical properties of the conducting paints and solar cell parameters of the heterojunction solar cells were investigated as a function of electrode annealing conditions. The sintered CdS/CdTe solar cells whose electrode contacts were annealed at 350°C for 10 min in nitrogen showed maximum values of short-circuit current density, fill factor, and solar efficiency. Commercial carbon and silver paints can be used as electrodes to fabricate sintered CdS/CdTe solar cells with efficiency over 10%.     

The conduction characteristics of electrical trees in XLPE cable insulation

Depending on the morphology of the material and applied voltage frequency, three kinds of electrical trees can exist in cross‐linked polyethylene (XLPE) cable insulation, which are conducting, non‐conducting, and mixed trees with different growth mechanisms. It is suggested that when the needle is inserted into large spherulites, conducting trees will form in those spherulites; when it is inserted among spherulites, non‐conducting trees will appear along the boundaries of spherulites. Frequency will accelerate the growth of non‐conducting trees but have little influence on the initiation and growth processes of conducting trees. If the initiation process of non‐conducting trees is too difficult, they will grow into mixed trees. Finally, it is concluded that the space charge limited tiny breakdown around the tips of electrical trees is responsible for the propagation process of conducting trees; on the other hand, fast expansion occurs due to local high temperature and pressure along the boundaries, partial discharge in electrical tree paths and charge recombination, etc., which are the main reason for the growth of non‐conducting trees. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Sintering,microstructure and conductivity of La2NiO4+δ ceramic

Microstructure and electrical conducting properties of La₂NiO_4+δ ceramic were investigated in the sintering temperature range 1200–1400 °C. The results demonstrate that the microstructure and electrical conducting properties of La₂NiO_4+δ ceramic are sensitive to sintering temperature. Compared with a progressive densification development with sintering temperature from 1200 to 1300 °C along with an insignificant change in grain size, there is an exaggerated grain growth in the specimens sintered at higher temperatures. Increasing sintering temperature from 1200 to 1300 °C resulted in an enhancement of electrical conducting properties. Further increase of sintering temperature exceeding 1300 °C reduced the electrical conducting properties. A close relation between the microstructure and electrical conducting properties was suggested for La₂NiO_4+δ ceramic. With respect to the electrical conducting properties, the preferred sintering temperature of La₂NiO_4+δ ceramic was ascertained to be 1300 °C. The specimen sintered at 1300 °C exhibits a generally uniform microstructure together with electrical conductivities of 76–95 S cm⁻¹ at 600–800 °C.