通过环保，经济的技术合成的聚吡咯具有很高的电磁屏蔽效果,Journal of Applied Polymer Science

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通过环保，经济的技术合成的聚吡咯具有很高的电磁屏蔽效果
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-06-27 , DOI: 10.1002/app.49566
Rekha Agrawal _{1,

2} , Jyoti Shah ₁ , Govind Gupta ₁ , Ritu Srivastava ₁ , Chhemendra Sharma ₁ , Ravinder Kotnala ₁

Affiliation

使用标称量的六水合氯化铁（FeCl ₃ .6H _2）从单体吡咯轻松，环保地合成聚吡咯O）水溶液中氧化剂的化学氧化聚合方法已有报道。在聚吡咯合成中使用水性溶剂和六水合氯化铁盐是一条生态友好的路线，有利于大量生产聚吡咯。合成的聚吡咯样品显示出良好的电导率（2 S / cm），在5°C下反应8小时，产率为80％。在不同的反应时间和温度下，对聚吡咯样品的质量和性能进行了全面研究，而其他合成参数（如氧化剂与单体的摩尔比，氧化剂浓度和溶剂）保持恒定。反应时间较短的聚吡咯的X射线衍射分析表明存在氧化铁（Fe ₂ O ₃）高峰。由于残留的三价铁离子转化为Fe ₂ O ₃，因此在较短的反应时间可能不会发生完全反应。聚吡咯的X射线光电子能谱测量也证实了Fe ₂ O ₃的形成。的反应时间和温度适当地选择产生具有高产率和良好的导电性的纯相聚吡咯。通过我们的环保，经济高效的技术合成的聚吡咯在X波段（8–12 GHz）上具有30 dB的出色电磁屏蔽效能值。

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Significantly high electromagnetic shielding effectiveness in polypyrrole synthesized by eco‐friendly and cost‐effective technique

A facile and eco‐friendly synthesis of polypyrrole from monomer pyrrole using nominal amount of ferric chloride hexahydrate (FeCl₃.6H₂O) oxidant in aqueous solution by chemically oxidative polymerization method has been reported. The use of aqueous solvent and ferric chloride hexahydrate salt in polypyrrole synthesis have an eco‐friendly route favorable for the production of polypyrrole in large quantities. The synthesized polypyrrole samples exhibit good electrical conductivity (2 S/cm) and yield of 80% for reaction time of 8 hr at 5°C. Quality and properties of polypyrrole samples have been thoroughly investigated with varying reaction time and temperature while other synthesis parameters like molar ratio of oxidant to monomer, oxidant concentration, and solvent were kept constant. X‐ray diffraction analysis of polypyrrole with a shorter reaction time shows the presence of iron oxide (Fe₂O₃) peaks. The complete reaction may not occur at shorter reaction times due to which residual ferric ions converted into Fe₂O₃. X‐ray photoelectron spectroscopy measurement of polypyrrole also confirms the formation of Fe₂O₃. Appropriate selection of reaction time and temperature produced pure phase polypyrrole with high yield and good conductivity. Synthesized polypyrrole by our eco‐friendly and cost‐effective technique exhibits prominent electromagnetic shielding effectiveness value of 30 dB in the X‐band (8–12 GHz).

更新日期：2020-06-27

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