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Effect of Polar Polymers of PEG and PVA on the Enhanced Microwave-Absorbing Properties of MWNTs
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-07-13 , DOI: 10.1021/acs.jpcc.8b04059 Yiru Li 1 , Aibo Zhang 1 , Honglong Lu 1 , Xin Zhang 1 , Wen Zheng 1 , Miaomiao Li 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-07-13 , DOI: 10.1021/acs.jpcc.8b04059 Yiru Li 1 , Aibo Zhang 1 , Honglong Lu 1 , Xin Zhang 1 , Wen Zheng 1 , Miaomiao Li 1
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Two kinds of different oxygen-containing polar polymers, poly(vinyl alcohol) (PVA) and poly(ethylene glycol) (PEG), were chosen as modifiers to decorate multiwall carbon nanotubes (MWNTs) by a physical noncovalent method. The purpose of this article was to research the polymer polarity influencing the enhanced absorbing performance of MWNTs. Cole–Cole semicircle model was used to simulate the effects of polarization of PVA and PEG on MWNTs. Whereas the surface morphological structure of hybrids was observed via transmission electron microscope, the molecular structure of the hybrids were analyzed by Raman spectroscopy and Fourier transform infrared spectroscopy. For the PVA/MWNTs and PEG/MWNTs hybrids, the results of the reflection loss (RL) indicated that both of them had a better microwave absorption property. The maximum RL of PVA/MWNTs was −30.62 dB at 10.96 GHz and the bandwidth below −10 dB was 2.32 GHz (10.08–12.40 GHz), whereas the maximum RL of PEG/MWNTs was −25.17 dB at 10.16 GHz and the bandwidth below −10 dB was 1.84 GHz (9.28–11.12 GHz). The maximum RL of the PVA/MWNTs absorbent was higher than that of PEG/MWNTs absorbent. The results showed that the polymers with different polarity had noteworthy effects on the absorbing property of MWNTs.
中文翻译：
PEG和PVA极性聚合物对MWNTs增强的微波吸收性能的影响
选择两种不同的含氧极性聚合物，聚乙烯醇（PVA）和聚乙二醇（PEG）作为改性剂，通过物理非共价方法修饰多壁碳纳米管（MWNT）。本文的目的是研究影响MWNT增强吸收性能的聚合物极性。Cole-Cole半圆模型用于模拟PVA和PEG极化对MWNT的影响。通过透射电子显微镜观察杂种的表面形态结构，通过拉曼光谱和傅里叶变换红外光谱分析杂种的分子结构。对于PVA / MWNTs和PEG / MWNTs杂化物，反射损失（RL）的结果表明它们两者都具有更好的微波吸收性能。PVA / MWNT的最大RL为-30。在10.96 GHz时为62 dB，低于-10 dB的带宽为2.32 GHz（10.08–12.40 GHz），而PEG / MWNTs在10.16 GHz时的最大RL为-25.17 dB，在−10 dB以下的带宽为1.84 GHz（9.28– 11.12 GHz）。PVA / MWNTs吸收剂的最大RL高于PEG / MWNTs吸收剂的最大RL。结果表明，不同极性的聚合物对多壁碳纳米管的吸收性能有显着影响。
更新日期：2018-07-14
中文翻译：
PEG和PVA极性聚合物对MWNTs增强的微波吸收性能的影响
选择两种不同的含氧极性聚合物，聚乙烯醇（PVA）和聚乙二醇（PEG）作为改性剂，通过物理非共价方法修饰多壁碳纳米管（MWNT）。本文的目的是研究影响MWNT增强吸收性能的聚合物极性。Cole-Cole半圆模型用于模拟PVA和PEG极化对MWNT的影响。通过透射电子显微镜观察杂种的表面形态结构，通过拉曼光谱和傅里叶变换红外光谱分析杂种的分子结构。对于PVA / MWNTs和PEG / MWNTs杂化物，反射损失（RL）的结果表明它们两者都具有更好的微波吸收性能。PVA / MWNT的最大RL为-30。在10.96 GHz时为62 dB，低于-10 dB的带宽为2.32 GHz（10.08–12.40 GHz），而PEG / MWNTs在10.16 GHz时的最大RL为-25.17 dB，在−10 dB以下的带宽为1.84 GHz（9.28– 11.12 GHz）。PVA / MWNTs吸收剂的最大RL高于PEG / MWNTs吸收剂的最大RL。结果表明，不同极性的聚合物对多壁碳纳米管的吸收性能有显着影响。
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