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太赫兹光谱作为聚合物纳米复合材料中填料分布诊断的通用工具。

THz Spectroscopy as a Versatile Tool for Filler Distribution Diagnostics in Polymer Nanocomposites.

作者信息

Gorokhov Gleb, Bychanok Dzmitry, Gayduchenko Igor, Rogov Yuriy, Zhukova Elena, Zhukov Sergei, Kadyrov Lenar, Fedorov Georgy, Ivanov Evgeni, Kotsilkova Rumiana, Macutkevic Jan, Kuzhir Polina

机构信息

Institute for Nuclear Problems of Belarusian State University, Bobruiskaya Str., 11, 220006 Minsk, Belarus.

Physics Faculty, Vilnius University, Sauletekio 9, LT-10222 Vilnius, Lithuania.

出版信息

Polymers (Basel). 2020 Dec 18;12(12):3037. doi: 10.3390/polym12123037.

DOI:10.3390/polym12123037
PMID:33353036
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7767186/
Abstract

Polymer composites containing nanocarbon fillers are under intensive investigation worldwide due to their remarkable electromagnetic properties distinguished not only by components as such, but the distribution and interaction of the fillers inside the polymer matrix. The theory herein reveals that a particular effect connected with the homogeneity of a composite manifests itself in the terahertz range. Transmission time-domain terahertz spectroscopy was applied to the investigation of nanocomposites obtained by co-extrusion of PLA polymer with additions of graphene nanoplatelets and multi-walled carbon nanotubes. The THz peak of permittivity's imaginary part predicted by the applied model was experimentally shown for GNP-containing composites both below and above the percolation threshold. The physical nature of the peak was explained by the impact on filler particles excluded from the percolation network due to the peculiarities of filler distribution. Terahertz spectroscopy as a versatile instrument of filler distribution diagnostics is discussed.

摘要

由于含有纳米碳填料的聚合物复合材料具有卓越的电磁特性，不仅因其组成成分，还因其在聚合物基体内部的填料分布和相互作用，这类材料正在全球范围内受到深入研究。本文的理论表明，与复合材料均匀性相关的一种特殊效应在太赫兹波段得以体现。采用透射时域太赫兹光谱技术对通过聚乳酸（PLA）聚合物与添加的石墨烯纳米片和多壁碳纳米管共挤出制备的纳米复合材料进行研究。对于含石墨烯纳米片（GNP）的复合材料，无论是低于还是高于渗流阈值，应用模型预测的介电常数虚部的太赫兹峰都通过实验得到了证实。该峰的物理本质可通过由于填料分布特性而被排除在渗流网络之外的填料颗粒所产生的影响来解释。文中还讨论了太赫兹光谱作为一种用于填料分布诊断的通用工具。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/cf0e559f1da0/polymers-12-03037-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/f9a880d638ce/polymers-12-03037-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/2c8851fed283/polymers-12-03037-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/88e2f23f9416/polymers-12-03037-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/fdb7f04a8979/polymers-12-03037-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/f2e898579626/polymers-12-03037-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/576c581dc41d/polymers-12-03037-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/cf0e559f1da0/polymers-12-03037-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/f9a880d638ce/polymers-12-03037-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/2c8851fed283/polymers-12-03037-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/88e2f23f9416/polymers-12-03037-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/fdb7f04a8979/polymers-12-03037-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/f2e898579626/polymers-12-03037-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/576c581dc41d/polymers-12-03037-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/79e9/7767186/cf0e559f1da0/polymers-12-03037-g007.jpg

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