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原位聚合制备尼龙6/多壁碳纳米管复合材料及性能表征 总被引:4,自引:0,他引:4
用原位聚合法制备了尼龙6/多壁碳纳米管(MWCNTs)复合材料。先对多壁碳纳米管进行胺基功能化处理,再研究了多壁碳纳米管添加量对复合材料电性能和力学性能的影响,结果显示,复合材料体积电阻率和表面电阻率相对于不加碳纳米管制得的尼龙6基体降低了3个数量级,复合材料的介电常数显著增加,相对于不加碳纳米管的增加了71%;复合材料的弹性模量、弯曲模量、弯曲强度随碳纳米管加入量的增加大幅提高。 相似文献
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简述了聚合物/碳纳米管复合物的制备方法,超支化聚合物改性碳纳米管及其制备纳米复合材料的方法,进一步就超支化聚合物/碳纳米管复合材料在流变性能方面的研究进行了综述,并对超支化聚合物/碳纳米管复合材料未来的发展方向提出了几点建议。 相似文献
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以甲烷为碳源,通过化学气相沉积和化学蒸汽渗透两步法将热解炭填充至碳纳米管阵列间的空隙而制备出碳纳米管阵列/热解炭复合材料。采用扫描电镜和拉曼光谱仪对样品的结构进行表征。结果表明,碳纳米管被热解炭填充和覆盖形成均相的复合膜,其密度增加4倍,同时热解炭已石墨化。 相似文献
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《高分子材料科学与工程》2006,22(3):120-120
本发明提供了一种超支化聚对氯甲基苯乙烯接枝的碳纳米管及其制备方法。将碳纳米管处理后使其表面带有特定引发基团;然后用原子转移自由基聚合反应引发对氯甲基苯乙烯单体聚合,得到超支化聚对氯甲基苯乙烯接枝的碳纳米管。这种制备方法简单易行,可控性强;所得产品在有机溶剂中表现出良好的溶解性,可以作为高分子材料的特种添加剂;同时由于其纳米级的尺寸,可以作为特殊功能的纳米器件;也可以作为不同系统间物质传递与转移的载体;从而在纳米科学、材料科学和生物医学诸方面有着巨大的应用前景。 相似文献
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通过调控蝶翅的分步浸渍,在蝶翅模板上原位还原生成不同形状的纳米Ag-Au颗粒,并嵌入蝶翅精细分级结构得到纳米Ag-Au/蝶翅复合材料。在Ag-Au/蝶翅复合材料形成过程中,蝶翅既提供了构筑精细分级结构纳米复合材料的基体模板,又通过活性基团(如:—CONH—、—OH)参与控制Ag-Au颗粒的还原。因此,通过调控浸渍过程的温度和浸渍方式等工艺参数,得到30~50 nm的实心球状、50~80 nm空心球、不规则螺母形等不同形状的纳米Ag-Au粒子,这些纳米粒子原位沉积并均匀镶嵌在蝶翅基体上,不仅实现了对蝶翅的精细分级结构的复制,而且调控了所生成纳米Ag-Au粒子的形状。这种基于自然生物模板进行液相浸渍的制备方法为有效制备具有精细分级结构和多组分功能纳米结构的复合材料提供了重要借鉴方法。 相似文献
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为揭示碳纳米管湿度传感器的介电损耗,制作了一种电阻型碳纳米管湿度传感器.使用介电损耗相关理论对其频率特性进行分析,并利用普适方程建立了传感器介电损耗模型.对实验数据与所建立模型进行拟合,得到拟合决定系数为0.994,表明可以使用普适方程对传感器介电损耗进行描述.由于测试频率引起的传感器电阻变化会改变传感器线性度,分析了不同测试频率下传感器的线性度,发现当测试频率为10 kHz时传感器的线性度最佳(1.52%),此时传感器灵敏度为-7.83Ω/%RH. 相似文献
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采用超声分散磁场下原位聚合的方法制备了聚(甲基丙烯酸甲酯-丙烯酸丁酯)/碳纳米管/羰基铁粉电致形状记忆磁性复合材料。采用扫描电镜(SEM)、红外热像仪和电学性能测试等方法实验表征了材料的结构与性能。结果表明,在磁场下原位聚合可使羰基铁粉沿磁场方向取向,赋予材料各向异性的导电性能和磁响应性。超声辐照能使碳纳米管均匀分散在... 相似文献
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单壁碳纳米管用于制造氢气传感器已有几十年的历史。由于单壁碳纳米管与氢气的相互作用很小,因此需采用了多种改性来辅助,改性物包括金属、金属氧化物与聚合物等。一些研究指出,当与碳纳米管上的官能团结合时,改性物可以使响应提高几个数量级。在目前的研究中,已开发了许多新的结构。此外,单壁碳纳米管的直径和手性等结构也会影响氢气探测器的性能。本文对单壁碳纳米管的改性进行了分类,并对其影响因素进行了讨论,旨在为制造高响应度和低检测限的探测器提供支撑。 相似文献
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单壁碳纳米管和多壁碳纳米管的合成和应用研究得到广泛的关注和重视,并已取得了许多令人鼓舞的成果。双壁碳纳米管(DWCNTs)作为介于单壁碳纳米管和多壁碳纳米管之间的一种特殊结构碳纳米管,由于潜在的应用价值及作为研究碳纳米管层间作用最简单和理想的模型开始得到高度重视。介绍了双壁碳纳米管合成方法及理论和应用研究取得的进展。 相似文献
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As classical 1D nanoscale structures, carbon nanotubes (CNTs) possess remarkable mechanical, electrical, thermal, and optical properties. In the past several years, considerable attention has been paid to the use of CNTs as building blocks for novel high-performance materials. In this way, the production of macroscopic architectures based on assembled CNTs with controlled orientation and configurations is an important step towards their application. So far, various forms of macroscale CNT assemblies have been produced, such as 1D CNT fibers, 2D CNT films/sheets, and 3D aligned CNT arrays or foams. These macroarchitectures, depending on the manner in which they are assembled, display a variety of fascinating features that cannot be achieved using conventional materials. This review provides an overview of various macroscopic CNT assemblies, with a focus on their preparation and mechanical properties as well as their potential applications in practical fields. 相似文献
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The aim of present review article is to present a comprehensive and current overview of scientific advancement in liquid crystal and carbon nanotube suspension. Particular attention has been paid to the recent developments and fundamental understanding of carbon nanotube dispersion in nematic liquid crystals. The dispersion and interaction of carbon nanotube in liquid crystal matrices and more elaborately the effect of dispersion on the properties of liquid crystalline materials has been extensively discussed. Recent progress has shown that even a very minute concentration of carbon nanotube in liquid crystals can have a reflective impact on the electrical and optical properties of liquid crystals. Liquid crystals provide a distinctive environment for controlling the alignment of carbon nanotubes whereas carbon nanotubes are important for the enhancement and fine-tuning of liquid crystalline properties. Potential applications of liquid crystal and carbon nanotube suspension are briefly discussed. Conclusion and future perspectives of this rapidly emerging field is provided at the end. 相似文献
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David A. X. Nayagam Richard A. Williams Jun Chen Kylie A. Magee Jennifer Irwin Justin Tan Peter Innis Ronald T. Leung Sue Finch Chris E. Williams Graeme M. Clark Gordon G. Wallace 《Small (Weinheim an der Bergstrasse, Germany)》2011,7(8):981-981
In vivo host responses to an electrode‐like array of aligned carbon nanotubes (ACNTs) embedded within a biopolymer sheet are reported. This biocompatibility study assesses the suitability of immobilized carbon nanotubes for bionic devices. Inflammatory responses and foreign‐body histiocytic reactions are not substantially elevated when compared to negative controls following 12 weeks implantation. A fibrous capsule isolates the implanted ACNTs from the surrounding muscle tissue. Filamentous nanotube fragments are engulfed by macrophages, and globular debris is incorporated into the fibrous capsule with no further reaction. Scattered leukocytes are observed, adherent to the ACNT surface. These data indicate that there is a minimal local foreign‐body response to immobilized ACNTs, that detached fragments are phagocytosed into an inert material, and that ACNTs do not attract high levels of surface fouling. Collectively, these results suggest that immobilized nanotube structures should be considered for further investigation as bionic components. 相似文献