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首页> 外文期刊>Journal of Polymers and the Environment >Chemical Sensor Development and Antibacterial Activities Based on Polyaniline/Gemini Surfactants for Environmental Safety
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Chemical Sensor Development and Antibacterial Activities Based on Polyaniline/Gemini Surfactants for Environmental Safety

机译：基于聚苯胺/双子表面活性剂的化学传感器开发和抗菌活性对环境安全

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摘要

The polyaniline doped novel anionic gemini surfactant (PANI/GS) was chemically synthesized by a micellar polymerization process and then characterized in details by X-ray powder diffractometry, scanning electron microscopy, and FTIR spectroscopy. The results show the presence of polyaniline in the emeraldine base was formed by doping with gemini surfactant. The thermal properties of the composites were studied by carrying out thermal gravimetric analysis. The PANI/GS were found to be soluble in common organic solvents such as chloroform as well as DMSO. The antibacterial activity of the obtained PANI/GS was also evaluated against Gram positive bacteria Bacillus subtilis, Gram negative bacteria Escherichia coli and antibiotics (Amoxicillin) using the agar plate. The antibacterial study showed that the PANI/GS was found to be most effective against both B. subtilis and E. coli respectively which was significant compared to the amoxicillin. Beside that thin-layer of PANI/GS onto glassy carbon electrode (GCE) was fabricated with conducting 5% nafion coating agents to fabricate a sensitive and selective Cd2+ ionsic sensor in short response time into the phosphate buffer phase. The fabricated cationic-sensor was exhibited higher sensitivity, large-dynamic concentration ranges, long-term stability, and improved electrochemical performances towards Cd2+ ions. The calibration plot is linear (r(2), 0.9799) over the large Cd2+ concentration ranges (10.0 nM-1.0 mM). The sensitivity and detection limit is calculated as 2.324 A mu A A mu M(-1)cm(-2) and 6.85 nM (signal-to-noise ratio, at a SNR of 3) respectively. These novel efforts are intiated a well-known method for significant cationic sensor development with directly fabricated nanocomposite onto GCE for the detection of hazardous toxins in ecological and environmental fields in huge scales.
机译：通过胶束聚合工艺化学合成了聚苯胺掺杂的新型阴离子双子表面活性剂（PANI / GS），然后通过X射线粉末衍射，扫描电子显微镜和FTIR光谱对其进行了详细表征。结果表明，通过掺入双子表面活性剂形成了翡翠碱中聚苯胺的存在。通过进行热重量分析研究了复合材料的热性能。发现PANI / GS可溶于常见的有机溶剂，例如氯仿和DMSO。使用琼脂平板还评估了获得的PANI / GS对革兰氏阳性菌枯草芽孢杆菌，革兰氏阴性菌大肠杆菌和抗生素（阿莫西林）的抗菌活性。抗菌研究表明，发现PANI / GS分别对枯草芽孢杆菌和大肠杆菌均最有效，与阿莫西林相比具有显着意义。除此之外，在玻璃碳电极（GCE）上的PANI / GS薄层是用5％的nafion涂层剂制造的，以在很短的响应时间内将敏感的，选择性的Cd2 +离子传感器制成磷酸盐缓冲相。所制造的阳离子传感器表现出更高的灵敏度，较大的动态浓度范围，长期稳定性以及对Cd2 +离子的改善的电化学性能。在较大的Cd2 +浓度范围（10.0 nM-1.0 mM）上，校准曲线是线性的（r（2），0.9799）。灵敏度和检测极限分别计算为2.324 A A A A M M（-1）cm（-2）和6.85 nM（信噪比，SNR为3）。这些新颖的成果是众所周知的重大阳离子传感器开发方法，其直接在GCE上制备了纳米复合材料，可用于大规模检测生态和环境领域中的有害毒素。

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