Click synthesis of quaternized poly(dimethylaminoethyl methacrylate) functionalized graphene oxide with improved antibacterial and antifouling ability

Tu, Qin; Tian, Chang; Ma, Tongtong; Pang, Long; Wang, Jinyi

doi:10.1016/j.colsurfb.2016.01.046

Cited by 60 publications

(25 citation statements)

References 42 publications

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“…After N-alkylation (QPDMAEMA structure), the C N + peak component intensities for both topologies significantly increased compared to the PDMAEMA structures shown in Figure 3, which indicated that the amino groups of DMAEMA units were successfully quaternized. A similar increase in C N + peak intensity was observed for the quaternized linear PDMAEMA grafted onto graphene oxide [62].…”

Section: Quaternization Of the Pdmaema Nanolayerssupporting

confidence: 73%

Nanolayers of Poly(N,N′-Dimethylaminoethyl Methacrylate) with a Star Topology and Their Antibacterial Activity

et al. 2020

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In this paper, we focus on the synthesis and characterization of novel stable nanolayers made of star methacrylate polymers. The effect of nanolayer modification on its antibacterial properties was also studied. A covalent immobilization of star poly(N,N′-dimethylaminoethyl methacrylate) (PDMAEMA) to benzophenone functionalized glass or silicon supports was carried out via a “grafting to” approach using UV irradiation. To date, star polymer UV immobilization has never been used for this purpose. The thickness of the resulting nanolayers increased from 30 to 120 nm with the molar mass of the immobilized stars. The successful bonding of star PDMAEMA to the supports was confirmed by surface sensitive quantitative spectroscopic methods. Next, amino groups in the polymer layer were quaternized with bromoethane, and the influence of this modification on the antibacterial properties of the obtained materials was analyzed using a selected reference strain of bacteria. The resulting star nanolayer surfaces exhibited higher antimicrobial activity against Bacillus subtilis ATCC 6633 compared to that of the linear PDMAEMA analogues grafted onto a support. These promising results and the knowledge about the influence of the topology and modification of PDMAEMA layers on their properties may help in searching for new materials for antimicrobial applications in medicine.

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Section: Quaternization Of the Pdmaema Nanolayerssupporting

confidence: 73%

Nanolayers of Poly(N,N′-Dimethylaminoethyl Methacrylate) with a Star Topology and Their Antibacterial Activity

et al. 2020

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“…Raman spectroscopic analysis is used to distinguish order and disorder crystal structure of carbon by functionalization . In Raman spectrum D and G band observed to indicate the k‐Point phonon of A 1 g symmetry and E 2 g phonon of sp 2 C atoms respectively ,. Accordingly, Figure shows superimposed Raman spectra of T‐GO and GO in the range of 1200–3000 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Tyramine Functionalized Graphene: Metal‐Free Electrochemical Non‐Enzymatic Biosensing of Hydrogen Peroxide

et al. 2018

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We report here non‐enzymatic electrochemical biosensing of H2O2 using a highly stable, metal‐free, tyramine functionalized graphene (T‐GO) based electrocatalytic system. The surface functionalization of tyramine on graphene was carried out chemically. The obtained sheets were characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD) as well as X‐ray photoelectron (XP), Raman, FT‐IR and UV‐visible spectroscopy. More significantly, the combined results from morphological and structural studies show the formation of a few layers of graphene with effective large‐scale functionalization by tyramine. As a metal‐free electrocatalyst, the as‐synthesized T‐GO shown good electrocatalytic activity towards reduction of H2O2 with a sensitivity of 0.105 mM/cm2 confirmed by combined results from cyclic voltammetric (CV) and linear sweep voltammetric (LSV), and amperometric (i–t) measurements. The lower onset potential (−0.23 mV vs SCE), lower detection limit, wider concentration range (10 mM to 60 mM) with higher electrochemical current and potential stability demonstrated the potential of our non‐enzymatic and cost‐effective T‐GO based electrocatalytic system towards reduction of hydrogen peroxide.

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“…The high density of oxygen functionalities on the surface of basal planes of graphene oxide (GO) and at the sheet edges, arising from oxidation of natural graphite powder with various oxidants in acidic media, offers the potential for solution processing and further functionalization, and makes GO an important precursor of graphene sheets8. Polymer materials have been covalently ‘grafted from’ or ‘grafted to’ GO-nanosheets, through oxygen-containing functional groups, via surface-initiated polymerization9101112, esterification1314, amidation1516, click-chemistry171819202122, and isocyanate modification23. The ‘grafting to’ approach is most commonly used methods for tethering polymers onto GO-nanosheets, in which polymer chains are attached directly to oxygen functionalities or other previously-attached surface molecules or at the GO-edges through simple chemical reactions2425.…”

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confidence: 99%

Reduced graphene oxide composites with water soluble copolymers having tailored lower critical solution temperatures and unique tube-like structure

Namvari

Biswas

Wang

et al. 2017

Sci Rep

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Nanohybrids of graphene with water soluble polymer were synthesized using ‘grafting from’ method. GO, prepared by modified Hummers’ method, was first reacted with sodium azide. Alkyne-terminated RAFT-CTA was synthesized by reaction of propargyl alcohol and S-1-dodecyl-S’-(α,α‘-dimethyl-α”-acetic acid) trithiocarbonate. RAFT-CTA was grafted onto the GO sheets by facile click-reaction and subsequently, N-isopropylacrylamide (NIPAM) and N-ethyleacrylamide (NEAM) were polymerized on graphene sheets via RAFT polymerization method. The respective copolymers with different ratios were also prepared. The nanohybrids were characterized by FTIR, XRD, TGA, Raman, SEM, and AFM. Both SEM and AFM clearly showed rod-like structures for rGO-PNEAM. XRD showed a small peak at 2θ = 19.21°, corresponding to d-spacing ≈ 4.6 Å. In addition, the nanohybrids showed a very broad temperature range for the LCST in water between ca. 30 and 70 °C.

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Click synthesis of quaternized poly(dimethylaminoethyl methacrylate) functionalized graphene oxide with improved antibacterial and antifouling ability

Cited by 60 publications

References 42 publications

Nanolayers of Poly(N,N′-Dimethylaminoethyl Methacrylate) with a Star Topology and Their Antibacterial Activity

Nanolayers of Poly(N,N′-Dimethylaminoethyl Methacrylate) with a Star Topology and Their Antibacterial Activity

Tyramine Functionalized Graphene: Metal‐Free Electrochemical Non‐Enzymatic Biosensing of Hydrogen Peroxide

Reduced graphene oxide composites with water soluble copolymers having tailored lower critical solution temperatures and unique tube-like structure

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