Engineering of Tannic Acid Inspired Antifouling and Antibacterial Membranes through Co-deposition of Zwitterionic Polymers and Ag Nanoparticles

Abstract

Recently, combining inorganic and organic components to develop a dual-functional surface (antibacterial and antifouling) has resulted in widespread investigations. However, the preparation of the dual-functional surface is limited by the availability of reactive surface chemistries at a material's surface. Herein, owing to the multifunctionality of Tannic acid (TA), we proposed a universal, simple, and environmentally friendly approach to integrate the inorganic (Ag nanoparticles) and organic (zwitterionic) components into the membrane surface to simultaneously endow the surface with antifouling and antibacterial ability, respectively. The Ag nanoparticles (NPs) and zwitterionic polymer were codeposited onto the TA decorated surface. The obtained membrane surface exhibited long-term and robust bactericidal activity. Meanwhile, due to the zwitterionic structure, the membrane could effectively resist bacterial adhesion. Additionally, the proposed strategy could also be employed to construct many kinds of dual-functional surfaces because of the versatile functionality of tannic acid.

Metal‐Phenolic Networks Nanoplatform to Mimic Antioxidant Defense System for Broad‐Spectrum Radical Eliminating and Endotoxemia Treatment

“…[31a,b,32] The Fe 2p3/2 peak can be fitted into two peaks with the BEs of 707.8 and 709.7 eV, corresponding to Fe 2+ and Fe 3+ , respectively. [32] The ratio of the two fitting peak areas of Fe 3+ and Fe 2+ is 50.8:26.5, close to 2:1 ( Figure S5f, Supporting Information), which is consistent with the ratio of Fe 3+ to Fe 2+ in Fe 3 O 4 NPs (Fe 2 O 3 •FeO). [31a,b] Meanwhile, the element contents on the surface of Fe 3 O 4 @ TA 1.0 NFs are shown in Table S2 (Supporting Information) and the results are similar to those obtained by EDX (Table S1, Supporting Information), which also proves that TA is not only coated on the surface of Fe 3 O 4 NPs, but also self-assembled into the nanosheet layer by coordination bond and other secondary bond forces (Figure 2a).…”

Green Synthesis of Silver Nanoparticles by Low-Energy Wet Bead Milling of Metal Spheres

“…In the latter case, only a microsized solid phase was produced with an average diameter of 300 nm, namely larger than those obtained in all other experimental runs. Figure 3d refers to a Zwitterionic capping agent, a proven choice for the synthesis of Ag nanowires [35] and, in more recent times, for antibacterial surface functionalization by co-deposition of Ag NPs with Zwitterionic polymers [36]. In the present bead milling process, DDAO showed a high efficiency as stabilizer, leading to a dispersion of Ag NPs with an average diameter of 3.5 nm.…”

Recent advances in membrane hydrophilic modification with plant polyphenol‐inspired coatings for enhanced oily emulsion separation

“…107 Taking advantage of the versatile functionality of TA, Xie et al developed dual-functional (antifouling and antibacterial) surface via TA-Fe 3+ assembly followed by co-deposition of amino riched zwitterionic polymer and Ag nanoparticles. 108 The obtained promising performance demonstrated the industrial potential of polyphenol-involved trinity coating towards sustainable environmental remediation, which deserves more research attention in the future.…”