导电炭墨在高分子材料中的应用

本文述及导电高分子材料中使用导电炭炭黑种类，性能和导电机理，影响炭黑复合材料导电性的因素，复合是电高分子材料的应用领域等。     

炭黑填充复合导电高分子材料研究和应用

概述了目前国内外炭黑填充复合导电高分子材料的研究现状、进展及应用，主要对炭黑性质，用量，基体树脂性能以及导电复合材料的特性进行了讨论。     

UHMWPVC/微细赤泥/炭黑复合导电材料的研究

使用超高相对分子质量的聚氯乙烯（UHMWPVC）,与微细赤泥、炭黑、增塑剂以及其他助剂共混制备复合导电材料。实验结果表明：微细赤泥可以提高复合体系的导电性能及加工稳定性能。讨论了炭黑和赤泥与材料导电性能、机械性能以及加工性能的关系。     

炭黑填充型导电高分子材料的研究进展

简要介绍了导电高分子材料的由来以及两种具体类型,深入探讨了复合型导电高分子材料的导电机制,重点突出了炭黑填充型复合导电高分子材料的制备方法及其导电机理,并在此基础上对比了多种炭黑填充型复合导电高分子材料的制备特点,探讨了一种炭黑填充型精密铸造导电蜡模的制备方法,最后基于国内外科研界的发展对制备炭黑填充型导电高分子材料的新趋势进行了展望。     

论炭黑对高分子材料电性能的影响

由于炭黑资源丰富、成本低、加工方便、性能稳定的优异特点，使炭黑填充型导电复合材料成为应用最广泛的导电复合材料，本文论述了炭黑的比表面积、结构性、表面化学性质、填充量对复合材料导电性能的影响，并探讨了不同高分子基体、不同加工工艺对炭黑分散状态及材料电性能的影响，叙述了改善炭黑分散状态的方法。     

复合导电高分子材料的改性及应用研究进展

介绍了复合导电高分子材料的主要构成和分类,综述了碳系复合导电高分子材料[如炭黑(CB)填料型、碳纳米管(CNTs)填料型和石墨烯填料型等]、金属系复合导电高分子材料和金属氧化物系复合导电高分子材料的改性进展。最后对复合导电高分子材料的应用和发展前景进行了展望。     

氟橡胶复合导电材料性能

研究以氟橡胶为基体树脂,炭黑、石墨和碳纤维为导电填料的导电复合高分子材料中,炭黑、石墨、碳纤维及三者之间的配比和混炼时间对复合材料导电性能和机械性能的影响,制备出体积电阻率小于1Ω·cm的氟橡胶复合导电材料。     

PS及PS接枝物/CB复合材料的导电性能

研究了ＰＳ及ＰＳ接枝物／ＣＢ复合材料的导电性能，讨论了炭黑用量、温度、加工工艺对其导电性能的影响，并研究了其复合导电材料的亚微结构和导电机理。     

碳系复合导电高分子材料研究进展

随着科学技术和工业生产的发展,人们对导电高分子材料的需求量越来越高,其中应用最广泛的就是碳系复合导电高分子材料。本文首先对导电高分子材料的制备方法和主要分类做了简单介绍,然后对碳系复合导电高分子中的炭黑填充型、石墨填充型、碳纳米管填充型三类的研究进展进行了阐述,最后对导电高分子材料未来的发展进行了展望。     

加工工艺对高分子基PTC自限温电热丝性能的影响

研究了乙炔炭黑填充LDPE智能型电热丝的挤出加工工艺参数，及热处理与辐照交联等后加工手段对高分子基PTC自限温电热丝导电性能的影响。结果发现，电热丝挤出口模温度、螺杆转速(或牵引速度)、护套挤出方式及护套厚度、护套材料性能对PTC自限温电热丝性能有很大影响；热处理、辐照工艺与通电时间次序对智能PTC导电材料的电阻率亦有影响。     

PE-HD/CNTs/CB复合材料的导电行为研究

用溶液超声分散法制备了高密度聚乙烯/碳纳米管/炭黑(PE-HD/CNTs/cB)导电复合材料,研究了CNTs与CB的比例以及两者的总含量对复合材料导电行为的影响.结果表明,CNTs与CB以不同比例混合的试样其渗流阈值较PE-HD/CNTs高,比PE-HD/CB的低,CNTs与CB在材料内部可能形成了共同的导电网络;当其...     

炭黑填充导电橡胶电阻率稳定性的研究

用炭黑填充丁腈橡胶制备导电涂层复合材料，研究了复合材料室温电阻率随不同种炭黑填充率变化的关系，复合材料电阻率随温度变化的特性以及ρ～Ｔ特性的稳定性，讨论了炭黑结构和性质，填充ＳＢＳ以及增加硫化剂用量对复合材料，ρ～Ｔ特性的影响。     

Electrical,rheological and electromagnetic interference shielding properties of thermoplastic polyurethane/carbon nanotube composites

Electrically conducting rubbery composites based on thermoplastic polyurethane (TPU) and carbon nanotubes (CNTs) were prepared through melt blending using a torque rheometer equipped with a mixing chamber. The electrical conductivity, morphology, rheological properties and electromagnetic interference shielding effectiveness (EMI SE) of the TPU/CNT composites were evaluated and also compared with those of carbon black (CB)‐filled TPU composites prepared under the same processing conditions. For both polymer systems, the insulator–conductor transition was very sharp and the electrical percolation threshold at room temperature was at CNT and CB contents of about 1.0 and 1.7 wt%, respectively. The EMI SE over the X‐band frequency range (8–12 GHz) for TPU/CNT and TPU/CB composites was investigated as a function of filler content. EMI SE and electrical conductivity increased with increasing amount of conductive filler, due to the formation of conductive pathways in the TPU matrix. TPU/CNT composites displayed higher electrical conductivity and EMI SE than TPU/CB composites with similar conductive filler content. EMI SE values found for TPU/CNT and TPU/CB composites containing 10 and 15 wt% conductive fillers, respectively, were in the range ?22 to ?20 dB, indicating that these composites are promising candidates for shielding applications. © 2013 Society of Chemical Industry     

HDPE/CB复合体系PTC行为的工艺研究

采用高结构导电炭黑(CB)Vxc—72与半晶聚合物高密度聚乙烯(HDPE)进行熔融共混，制备复合型导电高分子材料。研究了该复合体系中偶联处理、混炼时间、辐射及退火处理等工艺因素对其PTC(电阻—温度效应)性能的影响。结果表明，当辐照剂量为140—160kGy、炭黑非均匀分散且进行退火处理时复合体系具有最佳的PTC性能，但混炼时间过长、偶联处理均会使复合体系PTC强度降低。     

Improved stability of volume resistivity in carbon black/ethylene-vinyl acetate copolymer composites by employing multi-walled carbon nanotubes as second filler

Semiconductive polymer shielding layers of power cable require stable volume resistivity to protect the insulation layer from stress enhancements when carbon black (CB)/polymer composite undergoes thermal cycles. For the CB-filled polymer composites, CB would often re-aggregate when temperature is close to the melting point of polymer matrix, so that the conductive network would be destroyed. Re-distribution of CB and re-formation of conductive CB network under thermal cycles might be the main reason for the instability of volume resistivity. In this work, the re-aggregation of CB in the CB/polymer composites was disclosed. Besides, a small amount of multi-walled carbon nanotubes (MWNTs) was employed as cofiller with CB to improve the stability of volume resistivity of the polymer composites under thermal cycles. The total weight fraction of conductive fillers (CB or CB cofilled with MWNTs) was set as 35 wt%. Compared with the polymer composites loaded with CB solely, the volume resistivity of the composites filled with CB-MWNTs was much more stable with changing temperature. This can be attributed to the enhancement of conductive networks when the MWNTs are employed as second conductive filler.     

CTBN对CB/EP基导电复合材料电性能的影响

以低结构CB(炭黑)为导电填料、EP(环氧树脂)为基体、CTBN(端羧基液体丁腈橡胶)为改性剂和2,4-EMI(2-乙基-4-甲基咪唑)为固化剂,采用超声分散法制备CB/EP基导电复合材料.研究结果表明:CB/EP基导电复合材料具有明显的导电渗流行为,其渗流阈值为w(CB)=7.1％;当w(CTBN)=12％时,含CT...     

偶联处理对HDPE/炭黑复合材料PTC性能的影响

以HDPE／工业炭黑(CB)复合材料为研究对象，考察了炭黑及偶联剂种类、用量对高分子PTC(正温度系数)导电材料性能的影响，并探讨了偶联接技机理，从理论上对改性效果进行了分析。结果表明，对炭黑(尤其是槽法炭黑)进行表面处理可显著提高复合材料的电导率，减小NTC(负温度系数)效应；钛酸配偶联剂具有最佳改性效果，可明显改善炭黑粒子分散状态，增强材料的PTC效应，其最佳用量为1％。     

Preparation of conductive polylactic acid/high density polyethylene/carbon black composites with low percolation threshold by locating the carbon black at the Interface of co-continuous blends

In the current study, polylactic acid/high density polyethylene/carbon black (PLA/HDPE/CB) composites are prepared via a two-step method. A double percolation network with co-continuous structure and filler distribution at the interface is constructed to design conductive polymer composites with low percolation threshold. The controllable distribution of CB at the interface is achieved by appropriate processing procedures involved mixing sequence and mixing time by taking advantage of the migration of CB from the unfavorable PLA phase to the favorable HDPE phase. Morphology characterization reveals that when the mixing time of the added HDPE is 3 min, the formation of co-continuous structure of PLA/HDPE (60/40, w/w) is observed, and CB particles migrate to the co-continuous interface. The electrical conductivity measurement shows that such double percolation conductive network reduces the percolation threshold of PLA/HDPE/CB to 2.42 wt%. The rheological property proves the establishment of particle percolation network, and the rheological percolation threshold is determined as 1.20 wt%. The prepared PLA/HDPE/CB composite by the two-step method displays a notably low percolation threshold than that prepared by one-step simultaneous mixing. Moreover, this strategy presents a high potential application in the fabrication of conductive polymer composites involving other miscible multiphase systems.     

Study of the conductive paths of carbon-black-filled polyethylene composites by the alternating-current impedance method

Conductive carbon-black (CB)-filled polyethylene composites were prepared after irradiation with a cobalt 60 source. The conductive composites were characterized by alternating-current impedance spectroscopy, and the conductive mechanism of the conductive composites was analyzed in terms of a mathematical model. The values of the conductive ability, conductive style, sum of the electrical resistance of the continuous CB chains, electrical resistivity of the CB chains with one gap or a few small gaps, room-temperature resistance, and slopes of the conductive composites were calculated. The investigation indicated that there existed continuous (contacting)-path CB chains, small-gap chains, and larger gap CB chains inthe composites, and the conductive paths in the composites were considered to be a three-dimensional network. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Voltage–current characteristics of high-density polyethylene conductive composites

The high-density polyethylene (HDPE) conductive composites filled separately with carbon fibers (CFs), ethylene-vinyl acetate copolymer (EVA), and three kinds of carbon blacks (CBs) (including different diameter, BET specific area, and DBP value) were prepared, to investigate the influence of the property, size, and content of the conductive fillers on the nonlinear voltage–current characteristics of the HDPE conductive composites. The results showed that the relationship between the electric current density and the electric field intensity of the three HDPE/CB composites including the HDPE/CF composites, the HDPE/CB/CF composites, and the HDPE/EVA/CB composites was nonlinear. The nonlinear conductivity index of the HDPE/CF composites was kept a low level comparing to the HDPE/CB composites, the HDPE/CB/CF composites, and the HDPE/EVA/CB composites. Moreover, the nonlinear conductive behavior mechanisms were discussed.