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首页> 外文期刊>Journal of Polymers and the Environment >Novel Biocide Based on Cationic Derivative of Psyllium: Surface Modification and Antibacterial Activitv
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Novel Biocide Based on Cationic Derivative of Psyllium: Surface Modification and Antibacterial Activitv

机译：基于欧车前子阳离子衍生物的新型杀菌剂：表面修饰和抗菌活性

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摘要

To circumvent the problems (such as volatilization, photolytic decomposition, chemical instability, easy permeability through the skin) associated with low molecular weight antimicrobial agents, our strategy employed graft copolymerization of cationic monomer with the polymeric substrate viz. psyllium husk. The surface graft concentration of quaternary ammonium ion on psyllium was optimized by measuring the extent of grafting in the microwave-induced process. The surface modification of graft copolymers was evident by different physico-chemical techniques like C-13 nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), X-ray diffractometer (XRD), differential scanning calorimetry (DSC), Thermo gravimeteric analysis (TGA), and viscometric study. The synthesized water soluble product resulted good antibacterial activity against Gram positive Staphylococcus aureus and Bacillus anthracis but failed to produce any antibacterial activity against Gram negative Salmonella typhi and Escherichia coli. The reason to failure has been explained on the basis of differences in the electrokinetic property between Gram-positive and Gram-negative bacteria. Optimum minimum inhibitory concentration (MIC) for the polymeric grade which showed good biocidal effect evaluated by both zone of inhibition and absorbance is found at 1000 mu g/ml.
机译：为了规避与低分子量抗菌剂相关的问题（例如挥发，光解，化学不稳定性，易渗透皮肤），我们的策略是将阳离子单体与聚合物基质进行接枝共聚。车前子壳。通过测量微波诱导过程中的接枝程度，优化了车前草上季铵离子的表面接枝浓度。接枝共聚物的表面改性通过不同的物理化学技术得到了证明，例如C-13核磁共振（NMR），傅立叶变换红外光谱（FTIR），扫描电子显微镜（SEM），X射线衍射仪（XRD），差示法。扫描量热法（DSC），热重分析（TGA）和粘度计研究。合成的水溶性产物对革兰氏阳性金黄色葡萄球菌和炭疽芽孢杆菌具有良好的抗菌活性，但对革兰氏阴性鼠伤寒沙门氏菌和大肠杆菌没有产生任何抗菌活性。失败的原因已根据革兰氏阳性菌和革兰氏阴性菌之间电动特性的差异进行了解释。发现聚合物级的最佳最小抑菌浓度（MIC）显示出良好的杀菌作用，该抑菌作用通过抑菌区和吸光度来评估，为1000μg / ml。

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