A comparison study on polymeric nanocomposite foams with various carbon nanoparticles: adjusting radiation time and effect on electrical behavior and microcellular structure

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Smart and Nano Materials Pub Date : 2022-07-03 DOI:10.1080/19475411.2022.2107110

Mohammad Aghvami‐Panah, Ao Wang, Mahyar Panahi-Sarmad, Seyed Hossein Seyed Esfahani, A. Seraji, Mehrnaz Shahbazi, R. Ghaffarian, Seifollah Jamalpour, Xue Xiao

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引用次数: 7

Abstract

ABSTRACT The effect of carbon black (CB), carbon nanotube (CNT), and graphene (G) on foaming, electrical conductivity (EC), and electromagnetic interference (EMI) shielding of polystyrene (PS) foam that has been produced via microwave heating operation and supercritical carbon dioxide (CO2) was studied. Foams containing 1 wt %, CNT, and G reached over 90% porosity after 30 s and 3 min radiation time, respectively; however, PS/CB foam did not expand properly even after 3.5 min. In addition, the expansion ratio of PS/CB and PS/G was one-sixth and one-half of PS/CNT, respectively – due to the great CNT’s ability to convert microwave radiation to heat. EC of solid and porous nanocomposites has been increased via raising filler content; however, PS/CNT displayed the highest value at the same volume fractions. This ascending trend could not endure during foaming, so a remarkable optimum-point has been observed for nanocomposite foams. Eventually, EMI-shielding properties of solid and foam nanocomposites were discussed. Graphical Abstract

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不同碳纳米颗粒对聚合物纳米复合泡沫材料电学性能和微孔结构影响的比较研究

研究了炭黑(CB)、碳纳米管(CNT)和石墨烯(G)对微波加热和超临界二氧化碳(CO2)制备的聚苯乙烯(PS)泡沫的发泡、电导率(EC)和电磁干扰(EMI)屏蔽的影响。含碳纳米管1 wt %、碳纳米管1 wt %、碳纳米管1 G %的泡沫在辐照30 s和3 min后孔隙率达到90%以上;然而，即使在3.5分钟后，PS/CB泡沫也没有正常膨胀。此外，PS/CB和PS/G的膨胀率分别是PS/CNT的六分之一和二分之一，这是由于CNT具有将微波辐射转化为热量的强大能力。提高填料含量可提高固体和多孔纳米复合材料的电导率;而在相同体积分数下，PS/CNT的值最高。这种上升趋势在发泡过程中不能持续，因此纳米复合材料泡沫有一个显著的最佳点。最后讨论了固体纳米复合材料和泡沫纳米复合材料的电磁屏蔽性能。图形抽象

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来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.