Brushing up from “anywhere” under sunlight: a universal surface-initiated polymerization from polydopamine-coated surfaces

Polydopamine (PDA) is a polymer easily obtained by oxidation of dopamine. It is composed of indole and dopamine units in various oxidation states and to a lesser extent of pyrroles. It adheres to all type of surfaces even under water due to its abundant catechol moieties assisted by amino groups. This property together with a widespread reactivity to nucleophiles and electrophiles allowing linkage of a variety of entities renders PDA extremely interesting for various applications in biology, biomedicine, membranes, catalysis, materials and water purification. The field of PDA is violently developing. The present review gives an overview about the chemistry and properties of PDA and its analogues with the focus on recent publications. Their widespread applications are occasionally touched. Analogues are obtained by two strategies: post‐modification of PDA and oxidative polymerization of dopamine analogues. Scope and limitations of these strategies are worked out giving impulses for future research in the field.

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“…PDA can act as photo‐initiating layer to start surface‐initiated polymerization by sunlight resulting in polymer brush coatings …”

Section: Resultsmentioning

confidence: 99%

Chemistry of Polydopamine – Scope, Variation, and Limitation

2019

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“…The surface morphology of green tea polyphenol coatings and grafted polymer brushes was measured by atomic force microscopy (AFM), followed by roughness analysis (Figure ). The change in the RMS roughness of different coatings also confirmed the presence of TP and polymer brushes on the substrates . This indicated that the colorless TP coatings were deposited on various substrates, and different polymer brushes were successfully photografted on TP‐coated surfaces …”

Section: Resultsmentioning

confidence: 60%

“…This approach has been employed to initiate and control polymerization by means of light . Recently, Sheng et al reported a simple method to photograft polymer brushes on a variety of surfaces under sunlight, and prepare regular patterns by altering light irradiation . This method allowed spatial control over the architecture (pattern, gradient) of polymer films by altering light irradiation and did not require any transition metal catalyst or photoinitiator.…”

Section: Introductionmentioning

confidence: 99%

UV‐Triggered Surface‐Initiated Polymerization from Colorless Green Tea Polyphenol‐Coated Surfaces

Bai

Qie

et al. 2016

Macromol. Rapid Commun.

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A facile and versatile approach to constructing colorless surface coatings based on green tea polyphenols is reported, which can further act as a photoinitiating layer to initiate radical polymerization. These colorless green tea polyphenol coatings are capable of successfully photografting polymer brushes, and the resulting polymer brush patterns show spatial shape adjustability by masked UV irradiation. Both surface modifications and photografted polymer brushes do not alter the original color of the substrates. This method could be promising for the development of surface modifications.

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“…and Zhang et al. described that dopamine cannot only act as binding agent to adhere onto the surface of substrate, and also serve as the initiator to trigger the radical polymerization of acrylate monomers . Starting from this concept, we employed dopamine as both binding agent and the initiator for one‐step grafting of polymer brushes with quaternary ammonium cations onto sponge fiber through dopamine self‐polymerization and initiated free radical polymerization reaction of 2‐(methacryloyloxy)ethyltrimethylammonium chloride (METAC).…”

Section: Resultsmentioning

confidence: 99%

Compressible Metalized Soft Magnetic Sponges with Tailorable Electrical and Magnetic Properties

Xi¹,

Hu²,

Liu³

et al. 2020

ChemNanoMat

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Porous metallic sponge has shown enormous application potential in many fields including electrochemical electrode, catalysis, sensors, separation and purification, microwave and sound inhibition, etc. In this paper, we described the preparation of a class of highly compressible NiÀ Co alloy-based sponges with tailorable conductivity and soft magnetic properties as well as EMI shielding ability by employing elastic porous melamine sponge as the support. The melamine sponge was first modified by one-step dopamine-triggered radical polymerization reaction, in which polymer brushes with quaternary ammonium cations were grafted onto the sponge fibers for the capture of negative catalyst moieties. The immobilized catalyst moieties could subsequently induce in-situ chemical deposition of a uniform and well-adhesive NiÀ Co alloy layer with controllable compositions and thickness on the fiber surface owing to the interpenetrating network between hydrophilic polymer brushes and the in-situ deposited metal layer. The obtained alloy sponges show good compression-resilience property, excellent conductivity and favorable soft magnetic performance as well as good compressive fatigue resistance during repeated compression-release cycles, and thus can find promising applications in many fields, including pressure resistance sensors, magnetic controlled pollutant absorbents, tunable EMI shielding materials, etc.

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Brushing up from “anywhere” under sunlight: a universal surface-initiated polymerization from polydopamine-coated surfaces

Abstract: A generalized surface-initiated photografting procedure, which utilizes polydopamine as a photosensitive initiating layer, allows functionalization of almost any substrate with thin polymer films under sunlight.

Cited by 157 publications

References 54 publications

Chemistry of Polydopamine – Scope, Variation, and Limitation

Chemistry of Polydopamine – Scope, Variation, and Limitation

UV‐Triggered Surface‐Initiated Polymerization from Colorless Green Tea Polyphenol‐Coated Surfaces

Compressible Metalized Soft Magnetic Sponges with Tailorable Electrical and Magnetic Properties

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