聚合物/碳纳米管导电复合材料研究进展

综述了聚合物/碳纳米管复合材料的制备方法及其电学性能的研究进展。评述了聚合物/碳纳米管复合材料常用的制备方法,包括溶液共混、熔融共混、原位聚合等,特别强调碳纳米管在聚合物基体中的分散;介绍了采用聚乙烯、环氧树脂等为基体的碳纳米管复合材料电学性能研究的两个方面:导电渗流行为和正温度系数效应;对聚合物/碳纳米管导电复合材料研究中存在的问题如工艺改进、机理解释等进行了讨论,并展望了这一类材料的发展前景。     

碳纳米管／聚合物复合材料的研究进展

综述了碳纳米管／聚合物复合材料的最新研究进展。重点介绍了碳纳米管／不同种类聚合物复合材料的制备方法、表面改性和碳纳米管增强复合材料的力学性能。     

碳纳米管/聚合物复合材料及其应用

碳纳米管具有优异的力学性能、热性能及电性能,因此在聚合物复合材料领域具有巨大的应用潜力。本文侧重介绍碳纳米管在聚合物中作为增强相、功能填料和智能元件方面的应用研究情况,讨论了碳纳米管聚合物复合材料界面、力学性能及应用研究存在的问题,展望了碳纳米管在航空航天复合材料领域的应用前景。     

碳纳米管/聚合物复合材料的研究进展

综述了碳纳米管/聚合物复合材料的研究进展,介绍了碳纳米管/聚合物复合材料的制备方法,特别强调了碳纳米管在聚合物基体中的分散和排列;综述了碳纳米管/聚合物复合材料研究在力学、电学、热学、阻燃性能等方面所取得的进展,并详细讨论了碳纳米管的长径比、碳纳米管在聚合物基体中的分散效果及排列对碳纳米管/聚合物复合材料性能的影响;最后探讨了碳纳米管/聚合物复合材料进一步发展所面临的机遇和挑战.     

非导电聚合物基体碳纳米管复合材料研究进展

碳纳米管具有优异的力学性能和独特的电学性能等 ,是聚合物基体复合材料的理想增强材料。本文按不同非导电聚合物基体类型进行了归纳 ,评述了非导电聚合物基体碳纳米管复合材料的制备、性能和应用等情况。     

碳纳米管/聚合物复合材料研究进展

综述了碳纳米管的预处理方法,重点介绍了有关碳纳米管复合材料的制备方法,结构表征,特殊性能及应用等.     

碳纳米管增强聚合物纳米复合材料研究进展

综述了近几年国内外在碳纳米管增强聚合物纳米复合材料力学性能方面的研究进展,主要介绍了以聚氨酯和聚酰亚胺为基体的复合材料。讨论了碳纳米管的各种改性方法及其作用原理,并对各种改性和制备方法的有效性进行了比较。最后,对碳纳米管增强聚合物纳米复合材料的发展前景进行了展望。     

聚合物／碳纳米管复合材料的研究进展

对碳纳米管及近年来制备碳纳米管/聚合物复合材料的研究进展进行了简要介绍。     

高强度碳纳米管/聚合物复合材料的制备和应用

介绍了碳纳米管的结构和碳纳米管/聚合物复合材料的制备方法——溶液共混法、熔融法、原位聚合法和化学修饰法等。结合碳纳米管的特性,综述了碳纳米管/聚合物复合材料在力学性能的增强、电极材料、生物医学材料等方面的应用。     

碳纳米管/聚合物基导热复合材料研究进展

碳纳米管（CNTs）由于优异的轴向导热性能,是目前制备高热导率聚合物基复合材料的一类重要填料。本文综述了近年来CNTs增强聚合物复合材料的研究进展,探讨了CNTs/聚合物复合材料的导热机理以及CNTs用量、尺寸及结构、表面改性、混杂CNTs粒子和聚合物基体结构等因素对CNTs/聚合物复合材料热导率的影响。同CNTs/聚合物的电导率相比,热导率远低于预期值,归因于CNTs/树脂界面间的声子频率失配现象导致了声子在界面的散射及很高的界面接触热阻,从而降低了体系热导率。分析和总结了改善体系热导率的方法和措施,采用特殊工艺使CNTs在基体内形成特殊的隔离结构或者取向结构是CNTs/聚合物导热复合材料的未来研究及发展方向。     

碳纳米管/聚合物复合吸波材料的研究进展

简要介绍了吸波材料研究的重要性,综述了碳纳米管/聚合物吸波材料的研究现状,主要包括碳纳米管/环氧树脂(ER)复合材料、碳纳米管/聚苯胺(PANI)复合材料以及碳纳米管/聚氯乙烯(PVC)复合材料的制备方法和吸波性能;并展望了碳纳米管/聚合物复合材料在航天工业领域的发展方向.     

碳纳米管填充聚合物基电磁屏蔽复合材料的研究进展

对碳纳米管填充聚合物基电磁屏蔽复合材料的研究进展进行了综述。在阐述研究电磁屏蔽材料必要性的基础上,介绍了复合材料的电磁屏蔽机理,重点论述了碳纳米管填充量、长径比及管径、屏蔽体的厚度、复合材料的加工方式等对复合材料电磁屏蔽性能的影响。最后对碳纳米管填充聚合物基复合电磁屏蔽材料的研究进行了展望,指出低成本填料与碳纳米管协同作用、可提高碳纳米管分散性的制备工艺的研究以及复合材料电磁屏蔽机理的研究等为未来的研究方向。     

碳纳米管/聚合物纳米复合纤维静电纺丝研究进展

简述了静电纺丝装置的发展及其基本原理;介绍了静电纺丝制备碳纳米管/聚合物纳米复合纤维的技术进展,主要技术是碳纳米管在聚合基体中的分散性以及二者之间的界面结合力;详述了碳纳米管/聚丙烯腈纳米复合纤维和碳纳米管/聚氧乙烯(PEO)纳米复合纤维的制备及技术进展。指出今后应进一步发挥碳纳米管的性能,改进静电纺丝装置。     

Spatial statistics of carbon nanotube polymer composites

Dispersion, distribution, and alignment of carbon nanotubes (CNT) in polycarbonate (PC) composites are quantified by means of statistical analysis of transmission electron microscopy (TEM) images. The analysed images originate from samples with 0.875 and 2 wt% CNT, processed by compression and injection moulding, respectively. The composites exhibit different microstructures with different electrical properties, depending on the processing parameters. By means of stereological approaches for projections of three dimensional fibre systems the CNT contents within the TEM samples are estimated. The tendency of CNT clustering as well as characteristic distances between the CNT and CNT clusters are quantified by evaluation of morphological functions. Furthermore, a correlation function is introduced to obtain a quantitative measure of CNT clustering within the isotropic compression moulded samples. For the injection moulded samples the correlation function is used to derive local orientation factors. The results underline that clustering of CNT can enhance and alignment of tubes can reduce electrical conductivity.     

多壁碳纳米管/两亲性嵌段聚合物复合材料的制备

采用两亲性三嵌段聚合物PAN-PEG-PAN的DMF溶液分散MWNTs,通过静电纺丝制备MWNTs/PAN-PEG-PAN复合纤维.采用流变仪与SEM分析了MWNTs的分散性以及MWNTs对复合材料的结构性能的影响.结果表明:MWNTs/PAN-PEG-PAN溶液的模量与粘度随着MWNTs的质量分数的增加而增加,当MW...     

Ultrahigh-shear processing for the preparation of polymer/carbon nanotube composites

Poly(vinylidene fluoride) (PVDF)/multiwalled carbon nanotube (MWCNT) composites were prepared using a novel ultrahigh-shear extruder by directly mixing MWCNT with PVDF in the molten state. A special feedback-type screw was used to obtain a high shear field and obtain a very uniform dispersion of the nanotubes in the polymer matrix under a higher screw rotation speed. Raman spectroscopy and scanning electron microscopy were used to determine the interaction and dispersion of nanotubes in the PVDF. The linear viscoelastic behavior and electrical conductivity of these composites were investigated. At low-frequencies, the storage shear modulus (G′) becomes almost independent of the frequency as nanotube loading increases, suggesting the onset of solid-like behavior in these composites. By plotting G′ vs. nanotube loading and fitting with a power-law function, we found that the rheological threshold of high-shear processed composites is about 0.96 wt% whereas that of low-shear processed composites is about 1.76 wt%. The electrical percolation threshold of high-shear processed composites is lower than that of low-shear processed composites.     

Release characteristics of selected carbon nanotube polymer composites

Multi-walled carbon nanotubes (MWCNTs) are commonly used in polymer formulations to improve strength, conductivity, and other attributes. A developing concern is the potential for carbon nanotube polymer nanocomposites to release nanoparticles into the environment as the polymer matrix degrades or is mechanically stressed. Here, we review characteristics related to release potential of five sets of polymer systems: epoxy, polyamide, polyurethane, polyethylene, and polycarbonate. Our review includes consideration of general characteristics and use of the polymer (as related to potential MWCNT release) and its MWCNT composites; general potential for nanomaterial release (particularly MWCNTs) due to degradation and mechanical stresses during use; and potential effects of stabilizers and plasticizers on polymer degradation. We examine UV degradation, temperature extremes, acid–base catalysis, and stresses such as sanding. Based on a high-level summary of the characteristics considered, the potential for release of MWCNT with typical, intended consumer use is expected to be low.     

碳纳米管的制备及其聚合物基复合材料的研究进展

本文综述了单壁碳纳米管的制备方法,重点阐述了化学气相沉积法的合成运用,并对目前碳纳米管在聚合物基纳米复合材料方面的研究做了综合阐述。