Research concerning the design and development of non-leaching antibacterial agents for quick water decontamination is in great demand for their effective re-use and minimizing biocide contamination in water. Herein, we have synthesized two bactericidal polymers based on guanidine backbone (henceforth called GN) and sulphonium backbone (henceforth called SP). We explored their uniqueness in deriving polyvinylidene fluoride (PVDF) based blend membranes which are foul resistant and bactericidal. Besides, the potential of these polycations in point-of-use applications was explored by coating them on porous ceramic supports. The chemical structures of these polymers were investigated via Fourier Transformation Infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and ¹H nuclear magnetic resonance (NMR). The bactericidal action was tested against Escherichia coli (E.coli ATCC 25922) and Staphylococcus aureus (S.aureus ATCC 25923) based model strains. The blend membranes showed more than a 3-log reduction of bacterial colonies for both the strains and 6-log reduction in the case of ceramic supports coated with GN and SP. This was further corroborated with intracellular reactive oxygen species (ROS) measurements. The non-leaching nature of these biocides was confirmed by inductively coupled plasma optical emission spectroscopy (ICP-OES) analysis. The antifouling nature of blend membranes with GN and SP polymers was demonstrated using Bovine serum albumin as model foulant. Further, the unique polymers, when coated on ceramic supports, showed good dye adsorption for methyl orange as model dye pollutants owing to their electrostatic interactions with the dye.

对于用于快速水净化的非浸出抗菌剂的设计和开发的研究迫切需要它们的有效再利用并最大程度地减少水中的杀菌剂污染。在此，我们合成了两种基于胍骨架（以下称为GN）和sulph骨架（以下称为SP）的杀菌聚合物。我们探索了它们在获得基于聚偏二氟乙烯（PVDF）的抗污和杀菌混合膜方面的独特性。此外，通过将它们涂覆在多孔陶瓷载体上，探索了这些聚阳离子在使用点应用中的潜力。这些聚合物的化学结构通过傅立叶变换红外光谱（FTIR），X射线光电子能谱（XPS）和¹H核磁共振（NMR）。杀菌作用是对所测试的大肠杆菌（大肠杆菌ATCC 25922）和金黄色葡萄球菌（金黄色葡萄球菌ATCC25923）模型应变。对于菌株而言，共混膜显示出细菌菌落的减少超过3-log，而对于用GN和SP包被的陶瓷载体，则减少了6-log。细胞内活性氧（ROS）的测定进一步证实了这一点。这些杀生物剂的非浸出性质已通过电感耦合等离子体发射光谱法（ICP-OES）分析得到证实。使用牛血清白蛋白作为模型污垢剂证明了掺混膜具有GN和SP聚合物的防污特性。此外，独特的聚合物在涂覆到陶瓷载体上时，由于它们与染料的静电相互作用，对甲基橙表现出良好的染料吸附能力，可作为模型染料污染物。