共查询到20条相似文献,搜索用时 89 毫秒
1.
2.
本文介绍了填充型导热绝缘高分子材料的导热机理,讨论了影响填充型导热绝缘高分子材料导热性能的主要因素,展望了导热绝缘高分子材料的发展方向。 相似文献
3.
4.
5.
6.
导热高分子材料的研究和开发进展 总被引:27,自引:1,他引:26
概述了导热高分子材料的应用开发背景,描述了近几年来导热塑料和橡胶的研究开发进展及对填充剂使用提出的要求。介绍了导热高分子材料理论研究和导热高分子材料的导热性能理论预测领域的最新成果。 相似文献
7.
8.
用石墨填充硅烷接枝可交联聚乙烯,制备导热高分子复合材料。研究了基体种类及填料含量对复合材料热性能的影响,交联前后材料力学性能、热性能的变化规律。结果表明,基体导热性能的差异在复合材料中将得到数倍甚至数十倍的扩大,填充20vt%以上石墨后材料导热性能才能得到较大提升,较高石墨含量下,材料力学性能在交联前后没有明显变化,导热性能随交联程度增加略有提高。 相似文献
9.
10.
11.
12.
Enhancement of thermoelectric conversion efficiency of polymer/carbon nanotube nanocomposites through foaming‐induced microstructuring 下载免费PDF全文
Semiconducting‐based materials such as bismuth antimony are current thermoelectric (TE) materials of choice because of their superior TE efficiency, which can be characterized by the dimensionless figure of merit (ZT). However, factoring the cost, weight, and environmental concerns, polymeric TE material systems have become attractive alternatives despite their lower ZT values. The potential to tailor the flexibility of polymeric TE materials also represent another key advantage, especially for wearable electronics. One of the key challenges to enhance their ZT values is the need to simultaneously increase the electrical conductivity and the Seebeck coefficient, while supressing the thermal conductivity. In this research, physical foaming is suggested as an innovative and effective processing strategy to circumvent this challenge. Multi‐walled carbon nanotube (MWCNT)/high density polyethylene (HDPE) nanocomposite foams were fabricated as a case example. Experimental results showed that introducing cellular structures in MWCNT/HDPE nanocomposites, loaded with 15 wt % MWCNT, would result in a 600‐fold increase in their ZT values. This great improvement was achieved through significantly reducing their effective thermal conductivity, while simultaneously increasing their electrical conductivity and Seebeck coefficients. The findings have proven that foaming can serve as a novel strategy to enhance the efficiency of various polymeric TE materials. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45073. 相似文献
13.
Attempts have been made to improve the performance of polymeric composite friction materials for eliminating undesirable mechanical and thermal effects on the opposing surfaces. Elastic compression modulus and thermal conductivity of the moulded friction materials were found to be the most effective parameters upon the thermal interaction between the disc and brake pad. Effects of elastic modulus on temperature accumulation of the interface have also been studied. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 364–369, 2001 相似文献
14.
15.
多孔陶瓷热导率的影响因素及其有效热导率的数值计算方法 总被引:1,自引:0,他引:1
多孔陶瓷因具有孔隙率高、体积密度小、比表面积大等独特的表面物理特性而被广泛应用于保温材料、炉膛材料、热障涂层材料、高温烟气过滤材料等,研究多孔陶瓷导热机制并给出其有效热导率的计算方法既是重点又是难点。本文总结了国内外研究的多孔陶瓷热导率的影响因素,概述了多孔陶瓷有效热导率的计算方法,并重点分析了不同显微结构的不同计算方法。针对不同的应用领域对材料热导率的不同要求,提出通过控制显微结构控制热导率是今后多孔陶瓷热导率研究得发展趋势。 相似文献
16.
基于聚苯乙烯泡沫塑料保温材料的应用和研究,综述了保温材料的研究现状,从影响保温材料保温性能的三大因素——耐火性能、导热率、吸水率进行具体分析;然后基于聚苯乙烯泡沫塑料保温材料的研究现状,概述了聚苯乙烯泡沫塑料的优势,并分析了其耐火性能和保温性能,发现聚苯乙烯泡沫塑料在保温方面效果显著;聚苯乙烯泡沫塑料保温材料可以应用于外墙外保温构造、内墙内保温构造、屋面工程保温构造。 相似文献
17.
18.
19.
20.
T. R. Vijaybabu T. Ramesh Suman Pandipati Sujit Mishra G Sridevi C Pradeep Raja Rhoda Afriyie Mensah Oisik Das Manjusri Misra Amar Mohanty Karthik Babu NB 《大分子材料与工程》2023,308(7):2300001
The lifespan and the performance of flexible electronic devices and components are affected by the large accumulation of heat, and this problem must be addressed by thermally conductive polymer composite films. Therefore, the need for the development of high thermal conductivity nanocomposites has a strong role in various applications. In this article, the effect of different particle reinforcements such as single and hybrid form, coated and uncoated particles, and chemically treated particles on the thermal conductivity of various polymers are reviewed and the mechanism behind the improvement of the required properties are discussed. Furthermore, the role of manufacturing processes such as injection molding, compression molding, and 3D printing techniques in the production of high thermal conductivity polymer composites is detailed. Finally, the potential for future research is discussed, which can help researchers to work on the thermal properties enhancement for polymeric materials. 相似文献