Construction of an Antibacterial Membrane Based on Dopamine and Polyethylenimine Cross-Linked Graphene Oxide

Abstract

Bacterial infections have been considered to be one of the greatest threats to human health. In this study, a covalently cross-linked GO membrane was fabricated through vacuum-assisted filtration self-assembly after being consequentially functionalized with dopamine (GO-PDA) and branched polyethylenimine (GO-PDA-PEI). The characteristics of GO, GO-PDA, and GO-PDA-PEI membranes were confirmed by Xray diffraction, Fourier transform infrared measurements, scanning electron microscopy images, static water contact angle measurements, etc. The GO-PDA-PEI membrane showed extraordinary stability, compared with GO and GO-PDA, confirmed by ultrasonication treatment. Notably, the GO-PDA-PEI membrane exhibited excellent antibacterial efficiency for both Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli (more than 99%) upon irradiation by a 795 nm near-infrared (NIR) laser. Interestingly, the GO-PDA-PEI membrane can be recycled, that is, the photothermal effect, as well as the antibacterial activity of the GO-PDA-PEI membrane, remained the same after 5-time recycling. Hence, the proposed system has great potential for future design of recyclable, highly stable, superior bacteriostatic membrane materials.

Swelling properties of graphite oxides and graphene oxide multilayered materials

“…299 Crosslinking of GO membranes using various chemical intercalation modifications was tested in several studies. [300][301][302] Moreover, some attempts to control the swelling and permeation of GO membranes using the electrical current Fig. 20 Scheme representing the most common methods to study swelling of GO materials and a broad range of parameters which affect swelling.…”

Fabrication of a hybrid ultrafiltration membrane based on MoS2 modified with dopamine and polyethyleneimine

“…a large amount of amino functional groups destroy the nonpublic valence interaction during the self-polymerization of dopamine due to the addition of PEI, which reducing the size of PDA aggregates and resulting in a thinner coating. [46][47][48] The IR spectra of the MoS 2 , MoS 2 -PDA, and MoS 2 -PDA-PEI are shown in Fig. 4(a).…”

Antibacterial carbon dots derived from polyethylene glycol/polyethyleneimine with potent anti‐friction performance as water‐based lubrication additives

“…As a common cationic polymer, polyethyleneimine (PEI) is widely used in cellular imaging, water treatment, gene delivery, and surface modification of nanomaterials, and so forth. [21][22][23][24][25] PEI modified nanomaterials have a wide range of applications in the field of antibacterial due to the primary, secondary, and tertiary amino groups [26][27][28] on the surface of PEI which endow nanomaterials excellent water solubility and well killing effect on both Gram-positive and Gram-negative bacteria. [29][30][31] Considering that the water lubricant shows poor friction-reducing, anti-wear ability and susceptibility to bacterial contamination, it is necessary to design a water-based lubricant additive with antibacterial ability while improving friction performance of the lubricant.…”