共查询到19条相似文献,搜索用时 78 毫秒
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介绍了导热聚合物的种类,分析了导热聚合物的导热机理以及总结了影响导热性能的内外在因素,并展望了导热聚合物的未来发展趋势。 相似文献
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综述了非常规新型导热粒子如纳米金刚石、碳化物、铁电陶瓷及其他无机功能粒子及其填充聚合物电介质的最新研究进展,重点探讨了新型导热粒子的含量、表面改性、加工方式等对聚合物复合材料的导热及介电性能的影响。介绍和分析了基于有机分子晶体为连续声子传递通路改性聚合物导热性能的研究及机理;在基体树脂内利用无机导热粒子及有机分子晶体可构筑连续的声子导热通路,从而达到降低界面热阻、提高体系热导率的目的。相比传统导热粒子,新型导热粒子在提高绝缘聚合物热导率的同时,还赋予体系其他物理性能如磁性、优良介电性能及储能等性能。 相似文献
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综述了以聚合物为基体的碳纳米管复合材料导热模型,分析了复合材料热传导体系中碳纳米管(CNTs)填料的作用机制,归纳了混合规则导热模型、均质模型、有效介质模型、非均质模型和随机分散模型等,并总结了导热模型常用的数值计算方法。这些模型丰富了导热理论,可以对复合材料导热系数进行初步预测,但在数值上都存在近似或者简化处理,对碳纳米管/聚合物复合材料预测广谱性较差。未来需要对分子尺寸和界面热阻等影响导热系数的关键因素深入探究,改善数值和表征分析方法,以期为碳纳米管/聚合物复合材料的导热性能的研究和设计提供参考,为其他复合材料导热性能的研究提供借鉴。 相似文献
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V. F. Skorodumov 《Fibre Chemistry》2006,38(3):251-254
A typical diagram is presented for an instrument for differential thermal analysis of polymers and methodological recommendations
for the technique for conducting DTA studies are given. Typical thermograms obtained with DTA are analyzed. The diagram for
the cup for conducting differential thermal analysis of polymers at high pressures is described. A conclusion is drawn concerning
the promise of DTA for studying polymers both at atmospheric and at high pressure.
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Translated from Khimicheskie Volokna, No. 3, pp. 55–58, May–June, 2006. 相似文献
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Several conducting polymers, including polyaniline, polypyrrole, polythiophene, polyvinylpyrrolidone, poly(3,4-ethylenedioxythiophene), poly(m-phenylenediamine), polynaphthylamine, poly(p-phenylene sulfide), and their carbon nanotube reinforced nanocomposites are discussed in this review. The physical, electrical, structural and thermal properties of polymers along with synthesis methods are discussed. A concise note on carbon nanotubes regarding their purification, functionalization, properties and production are reported. Moreover, the article focuses upon synthesis methods, properties and applications of conducting polymer/carbon nanotube nanocomposites are focused. Nanotube dispersion, loading concentration and alignment within conducting polymer/carbon nanotube nanocomposite affect their performance and morphology. The conducting polymer/carbon nanotube nanocomposites are substantially used in sensors, energy storage devices, supercapacitors, solar cells, EMI materials, diodes, and coatings. 相似文献
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导电聚合物复合材料作为超级电容器电极材料 总被引:1,自引:0,他引:1
本文综述了基于导电聚合物的复合材料(导电聚合物/碳材料、导电聚合物/金属氧化物材料、导电聚合物/碳材料l金属氧化物材料)作为电极材料在超级电容器中的应用进展,指出将导电聚合物与碳材料或金属氧化物复合,双电层电容与法拉第准电容结合,有机材料与无机材料结合,是超级电容器电极材料研究的重要发展方向. 相似文献
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Inorganic filler materials are often incorporated into polymer membranes to improve their mechanical, thermal and chemical stabilities. In case of proton‐conducting polymers, however, it is necessary to support or at least not to disturb the proton‐conducting matrix. By suitable combination of polymer and filler, effective and highly conductive composite membranes can be prepared. This article gives an overview of the possible applications of a special kind of such proton‐conducting composite membranes containing functionalized SiO2 particles with ordered mesoporosity in fuel cell, in desalination and in photocatalysis. 相似文献
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Conducting polymers of alkylanilines, pyrrole, and their conducting composites were synthesized by oxidation polymerization. The oxidants used were KIO3 and FeCl3 for the polyalkylanilines and polypyrrole (PPy), respectively. Among the polyalkylanilines synthesized with KIO3 salt, the highest conductivity was obtained with poly(2‐ethylaniline) (P2EAn) with a value of 4.10 × 10?5 S/cm. The highest yield was obtained with poly(N‐methylaniline) with a value of 87%. We prepared the conducting composites (PPy/P2EAn and P2EAn/PPy) by changing synthesis order of P2EAn and PPy. The electrically conducting polymers were characterized by IR spectroscopy, ultraviolet–visible spectroscopy, thermogravimetric analysis, and X‐ray diffraction spectroscopy. From the results, we determined that the properties of the composites were dependent on the synthesis order of the polymers. The thermal degradation temperature of PPy was observed to be higher than that of the other polymers and composites. We determined from X‐ray results that the structures of the homopolymers and composites had amorphous regions (88–95%) and crystal regions (5–12%). From the Gouy balance magnetic measurements, we found that the polymers and composites were bipolaron conducting mechanisms. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 241–249, 2006 相似文献
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简述了以嵌段共聚物为模板合成纳米结构导电聚合物材料的国内外发展状况。近年来,纳米结构导电聚合物材料作为极具研究价值的新型功能材料而成为了材料科学的研究热点。以嵌段共聚物为模板则是制备此类材料最有前途的方法之一。本文详细地总结并归纳了通过该方法制备形貌规整的纳米级导电聚合物材料的成形机理、实验方法及其影响因素等。最后总结了纳米结构导电聚合物材料相关研究中存在的诸多问题,并简要指出以嵌段共聚物为模板有助于提高导电高聚物的形貌及尺寸的可控性,进而有助于改善导电高聚物的溶解性、加工性能、电导率等各项性能,也将有利于拓宽导电高聚物在纳米科技领域中的应用前景。 相似文献