Polyvinyl Alcohol/Polypyrrole/Molecularly Imprinted Polymer Nanocomposite as Highly Selective Chemiresistor Sensor for 2,4‐DNT Vapor Recognition,Electroanalysis

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Polyvinyl Alcohol/Polypyrrole/Molecularly Imprinted Polymer Nanocomposite as Highly Selective Chemiresistor Sensor for 2,4‐DNT Vapor Recognition
Electroanalysis ( IF 2.7 ) Pub Date : 2018-07-04 , DOI: 10.1002/elan.201700751
Masoumeh Foroutan Koudehi ₁ , Seied Mahdi Pourmortazavi ₁

Affiliation

In this research, a chemiresistor sensor coated with the polyvinyl alcohol/polypyrrole/molecularly imprinted polymer (PVA/PPy/MIP) nanocomposite was designed and fabricated to detect the vapor of 2,4‐DNT as a nitroaromatic explosive material. The molecularly imprinted polymer was composed of molecular nanoparticles containing cavities compatible with DNT; while, the nanoparticles were synthesized using PVA and glutaraldehyde as functionalized polymer and cross‐linking agent, respectively. Composition and chemical properties of the synthesized MIP and PPy nanoparticles were investigated using scanning electron microscopy (SEM), infrared Fourier transform spectroscopy (ATR‐FTIR), and X‐ray diffraction (XRD) analyses. Results indicated that the nanoparticles of polypyrrole and the synthesized MIP have an average particle sizes of 56 nm and 45 nm, respectively. Afterwards, sensor surface was coated by a thin layer of nanocomposite composed of PVA, the PPy and MIP nanoparticles. The prepared sensors were calibrated and performance‐tested in a static setup. The developed sensor was used to measure different concentrations (0.1–150 ppm) of the explosive vapor. The coated sensor presented a linear range of response within the concentration range of 0.1–70 ppm. Also, selectivity tests were carried out in the presence of DNT and vapor of other organic matters and the results indicated that the designed sensor possesses high sensitivity and selectivity toward DNT.

中文翻译：

聚乙烯醇/聚吡咯/分子印迹聚合物纳米复合材料作为2,4-DNT蒸气识别的高选择性化学电阻传感器

在这项研究中，设计并制造了一种涂有聚乙烯醇/聚吡咯/分子印迹聚合物（PVA / PPy / MIP）纳米复合材料的化学电阻传感器，以检测2,4-DNT的蒸气作为硝基芳族爆炸材料。分子印迹聚合物由含有与DNT相容的腔的分子纳米颗粒组成。分别使用PVA和戊二醛作为官能化聚合物和交联剂合成了纳米颗粒。使用扫描电子显微镜（SEM），红外傅里叶变换光谱（ATR-FTIR）和X射线衍射（XRD）分析了合成的MIP和PPy纳米颗粒的组成和化学性质。结果表明，聚吡咯纳米颗粒和合成的MIP的平均粒径分别为56 nm和45 nm，分别。之后，传感器表面被一层由PVA，PPy和MIP纳米颗粒组成的纳米复合材料薄层覆盖。准备好的传感器在静态设置中进行了校准和性能测试。先进的传感器用于测量爆炸性蒸气的不同浓度（0.1-150 ppm）。涂层传感器在0.1-70 ppm的浓度范围内呈现出线性的响应范围。另外，在DNT和其他有机物蒸气的存在下进行了选择性测试，结果表明所设计的传感器对DNT具有很高的灵敏度和选择性。先进的传感器用于测量爆炸性蒸气的不同浓度（0.1-150 ppm）。涂层传感器在0.1-70 ppm的浓度范围内呈现出线性的响应范围。另外，在DNT和其他有机物蒸气的存在下进行了选择性测试，结果表明所设计的传感器对DNT具有很高的灵敏度和选择性。先进的传感器用于测量爆炸性蒸气的不同浓度（0.1-150 ppm）。涂层传感器在0.1-70 ppm的浓度范围内呈现出线性的响应范围。另外，在DNT和其他有机物蒸气的存在下进行了选择性测试，结果表明所设计的传感器对DNT具有很高的灵敏度和选择性。

更新日期：2018-07-04

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