Photoinduced anchoring and micropatterning of macroinitiators on polyurethane surfaces for graft polymerization of antifouling brush coatings

Pranantyo, Dicky; Xu, Liqun; Neoh, K. G.; Kang, En‐Tang; Yang, Wenjing; Teo, Serena Lay‐Ming

doi:10.1039/c3tb21201g

Cited by 32 publications

(38 citation statements)

References 52 publications

(71 reference statements)

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“…In addition, the N 1s core-level spectra of PFC6N 3 (Figure 4f) can be curve-fitted with three peak components with BEs at about 399.1, 400.3 and 403.8 eV, attributable to the negatively-charged nitrogen (N´), the imine nitrogen (-N=) and the positively-charged nitrogen (N`), respectively. In general, the azido group contains those three types of chemical environments (-N=N`=N´) [43]. Thus, the N 1s core-level spectrum of PFC6N 3 indicates that azido moieties have been successfully introduced.…”

Section: Resultsmentioning

confidence: 99%

PEGylated Fluorescent Nanoparticles from One-Pot Atom Transfer Radical Polymerization and “Click Chemistry”

Zhang

et al. 2015

Polymers

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Abstract:The preparation of PEGylated fluorescent nanoparticles (NPs) based on atom transfer radical polymerization (ATRP) and "click chemistry" in one-pot synthesis is presented.First, poly(p-chloromethyl styrene-alt-N-propargylmaleimide) (P(CMS-alt-NPM)) copolymer was prepared via reversible addition-fragmentation chain transfer (RAFT) polymerization. Subsequently, the azido-containing fluorene-based polymer, poly[(9,9-dihexylfluorene)-alt-(9,9-bis-(6-azidohexyl)fluorene)] (PFC6N 3 ), was synthesized via Suzuki coupling polymerization, followed by azidation. Finally, the PEGylated fluorescent NPs were prepared via simultaneous intermolecular "click" cross-linking between P(CMS-alt-NPM) and PFC6N 3 and the ATRP of poly(ethylene glycol) methyl ether methacrylate (PEGMMA) using P(CMS-alt-NPM) as the macroinitiator. The low cytotoxicity of the PEGylated fluorescent NPs was revealed by incubation with KB cells, a cell line derived from carcinoma of the nasopharynx, in an in vitro experiment. The biocompatible PEGylated fluorescent NPs were further used as a labeling agent for KB cells.

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Section: Resultsmentioning

confidence: 99%

PEGylated Fluorescent Nanoparticles from One-Pot Atom Transfer Radical Polymerization and “Click Chemistry”

Zhang

et al. 2015

Polymers

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“…Polyurethanes (PUs), another technologically relevant class of polymers frequently used in blood-and other fluid-containing devices, have been modified to reduce fouling [24]. A bifunctional macroinitiator containing an azide moiety and an ATRP initiator was synthesized in a multistep procedure.…”

Section: Biofunctional Structuresmentioning

confidence: 99%

“…Source: Adapted from Pranantyo et al[24], with permission from RSC Publishing. (Top) Reduced microfouling-that is, bacterial cell viability on surface grafted with PHEMA and PPEGMA compared to pristine PU and PU with covalently bound macroinitiator (PU-Br).…”

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confidence: 99%

Functional Polymer-on-Polymer Structures

Padeste

Neuhaus

2015

Polymer Micro- And Nanografting

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“…The N1 s core-level spectrum can be resolved into (ÀO=CÀNÀ), (ÀC=NÀ NÀ)a nd (ÀOÀN=OÀ)p eak components with binding energies (BEs) at approximately 399.8 eV, 400.2 eV and 406.1 eV,r espectively,w hich are characteristic of covalently bonded nitrogen. [26][27][28][29][30][31] For PVB-DHI( Figure2a) and PVB-NPH (Figure2d), the N1 s core-level spectrumc an be curve-fitted with three peak components having BEs at 399.8 eV (ÀO=CÀNÀ)a nd 400.2 eV (ÀC=NÀNÀ)w ith an area ratio of 1:1.9, and 400.2 eV (ÀC=NÀNÀ)a nd 406.1 eV (ÀOÀ N=OÀ)w ith an area ratio of 1:1.8. PVB-DHI 4 -NPH ( Figure 2b) and PVB-DHI-NPH 4 (Figure 2c) can be curve-fitted into two peak components with BEs at 399.8 eV (ÀO=CÀNÀ)a nd 406.1 eV (ÀOÀN=OÀ)w itha n area ratio of 2:1a nd 17:1, which indicatet hat the molar ratio of DHI:NPH is 2:1a nd 17:1 in PVB-DHI 4 -NPH and PVB-DHI-NPH 4 ,r espectively.T he result agrees with the result of the UV/ Vis absorption;f urther details can be found in Figure S4.…”

Section: Chemical Composition Analysismentioning

confidence: 99%

Adjusting the Proportion of Electron‐Withdrawing Groups in a Graft Functional Polymer for Multilevel Memory Performance

Wang

Zhang

et al. 2015

Chemistry An Asian Journal

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A polymer containing aldehyde active groups (PVB) was synthesized by atom transfer radical polymerization (ATRP), acting as a polymer precursor to graft a functional moiety via nucleophilic addition reaction. DHI (2-(1,5-dimethyl-hexyl)-6-hydrazino-benzo[de]isoquinoline-1,3-dione) and NPH (nitrophenyl hydrazine) groups, which contain naphthalimides that act as narrow traps and nitro groups that act as deep traps, were anchored onto the PVB at different ratios. A series of graft polymers were obtained and named PVB-DHI, PVB-DHI4 -NPH, PVB-DHI-NPH4 , and PVB-NPH. The chemical composition of the polymers was analyzed by (1) H-NMR spectroscopy and X-ray photoelectron spectroscopy (XPS). Memory devices were prepared from the polymers, and I-V characteristics were measured to determine the performance. By adjusting the ratio of different electron acceptors (DHI and NPH) to 4:1, ternary memory behavior was achieved. The relationship between memory behavior of PVB-DHIx NPHy and acceptor groups as well as their conduction mechanism were studied in detail.

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Photoinduced anchoring and micropatterning of macroinitiators on polyurethane surfaces for graft polymerization of antifouling brush coatings

Cited by 32 publications

References 52 publications

PEGylated Fluorescent Nanoparticles from One-Pot Atom Transfer Radical Polymerization and “Click Chemistry”

PEGylated Fluorescent Nanoparticles from One-Pot Atom Transfer Radical Polymerization and “Click Chemistry”

Functional Polymer-on-Polymer Structures

Adjusting the Proportion of Electron‐Withdrawing Groups in a Graft Functional Polymer for Multilevel Memory Performance

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