聚苯胺和氧化石墨纳米复合材料介电常数和抗菌性能的高频测量

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IET Nanodielectrics Pub Date : 2021-06-05 DOI:10.1049/nde2.12025
Shubha L.N., ChandraBabu Putta
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引用次数: 1

摘要

采用原位化学聚合法制备了聚苯胺/氧化石墨烯(PANI/GO)纳米复合材料。该合成涉及形成深绿色聚苯胺/氧化石墨复合材料。采用紫外可见光谱(UV)、x射线衍射(XRD)和透射电子显微镜(TEM)对复合材料的晶体结构和形貌进行了研究。XRD和紫外可见光谱的特征峰证实了聚苯胺/氧化石墨烯纳米复合材料的形成。直流电导率测量采用双探头法进行。利用射频阻抗分析仪研究了复合材料在100 MHz ~ 3 GHz频率范围内的介电响应。研究了介电常数ε′(w)和介电损耗ε′(w)。我们观察到介电常数ε′(w)和介电损耗ε′(w)随频率的增加而减小(对于不同的氧化石墨烯wt %)。考察了该复合材料的抗菌活性。
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High-frequency measurement of dielectric permittivity and antimicrobial properties of polyaniline and graphite oxide nanocomposites

The polyaniline/graphite oxide (PANI/GO) nanocomposite was prepared by the in situ chemical polymerisation method. The synthesis involved the formation of dark green coloured polyaniline/graphite oxide composite. The crystalline structure and morphology of the composite were studied using UV-visible spectroscopy (UV), X-ray diffraction (XRD) and transmission electron microscopy (TEM).The characteristic peaks in XRD and UV-visible spectra confirmed the formation of the PANI/GO nanocomposite. DC conductivity measurements were performed using a two-probe method. Dielectric responses of the composites were investigated in the frequency range100 MHz to 3 GHz by the RF impedance analyser. The dielectric constant ϵ′(w) and dielectric loss ϵ′′(w) were investigated. It was observed that the dielectric constant ϵ′(w) and dielectric loss ϵ′′(w) decreased with an increase in frequencies (for different wt % of GO). The antibacterial activity of this composite was examined.

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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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