Water is an essential comonomer in a supramolecular polymer that is used as a recyclable, water-activated glue.

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Bacterial biofilms are difficult to eradicate because they are less susceptible to antibiotics and more easily develop resistance.Therefore,there is an urgent need for new materials that can combat planktonic bacteria and disrupt established biofilms.T ot ackle this challenge,w ed esign am ultifunctional zwitterionic pillar[5]arene,w hich can self-assemble into weakly positively charged nanoaggregates that exhibit antibacterial activity against Gram-negative Escherichia coli (DH5a)a nd Gram-positive Staphylococcus aureus (SH1000) bacterial strains in solution. In addition, the zwitterionic pillar[5]arene can efficiently disrupt pre-existing Escherichia coli (DH5a)b iofilms and kill the biofilm-enclosed bacteria without rapid generation of resistance.

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A novel surface coating with durable broad-spectrum antibacterial ability was prepared based on mussel-inspired dendritic polyglycerol (MI-dPG) embedded with copper nanoparticles (Cu NPs). The functional surface coating is fabricated via a facile dip-coating process followed by in situ reduction of copper ions with a MI-dPG coating to introduce Cu NPs into the coating matrix. This coating has been demonstrated to possess efficient long-term antibacterial properties against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and kanamycin-resistant E. coli through an "attract-kill-release" strategy. The synergistic antibacterial activity of the coating was shown by the combination of two functions of the contact killing, reactive oxygen species production and Cu ions released from the coating. Furthermore, this coating inhibited biofilm formation and showed good compatibility to eukaryotic cells. Thus, this newly developed Cu NP-incorporated MI-dPG surface coating may find potential application in the design of antimicrobial coating, such as implantable devices.