Polymeric Janus nanoparticles templated by block copolymer thin films

Poggi, Elio; Bourgeois, Jean-Pierre; Ernould, Bruno

doi:10.1039/c5ra05290d

Cited by 7 publications

(4 citation statements)

References 19 publications

(23 reference statements)

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“…To date, a plethora of Janus particles of different sizes, shapes, and various compositions have been reported. Among them, polymeric Janus polymers are of particular interest because of the soft nature of the polymer chains and their controllable physicochemical properties …”

Section: Methodsmentioning

confidence: 99%

Precise Synthesis of PS‐PLA Janus Star‐Like Copolymer

Fan

Win

et al. 2018

Macromol. Rapid Commun.

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In this work, an efficient strategy is designed for the precise synthesis of novel Janus star-like copolymer (polystyrene) -b-(poly(l-lactide)) , (PLLA) -b-(PS) , consisting of two types of chemically distinct polymer arms, PS and PLLA, in an asymmetric structure. During the synthesis, PLLA hemisphere carrying protected hydroxyl groups at the focal point was first synthesized via a combined reactions of esterification, light-induced "Click" chemistry, and ring opening polymerization (ROP) using a specially designed dendron as initiator. After removing the protecting moiety, the terminal hydroxyl groups on the dendron segment is increased fourfold and further modified into bromopropionate-based macroinitiator through a two-step end group transformation reaction, followed by atom transfer radical polymerization (ATRP) of styrene to obtain the desired (PLLA) -b-(PS) Janus star-like copolymer. The versatility and efficiency of the designed synthetic strategy are demonstrated by the well-defined molecular characteristics and high yields of the targeted product. In addition to the controlled degradation behavior of the PLLA segments, the remaining bromide groups located at the distal end of PS arms could allow for further fabrication of diverse building blocks through consecutive ATRP of various monomers. This work signifies the first time for facile and precise synthesis of Janus star-like copolymer with unique biphasic structure and function control.

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Section: Methodsmentioning

confidence: 99%

Precise Synthesis of PS‐PLA Janus Star‐Like Copolymer

Fan

Win

et al. 2018

Macromol. Rapid Commun.

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“…Recently, Gohy and co‐workers reported a novel approach to synthesize well‐defined polymeric Janus nanoparticles by the combination of the self‐assembly of block copolymers PS‐ b ‐P4VP in thin fils and surface modification by polymer grafting, as highlighted in Figure . A nanostructured thin film as template with regularly spaced nearly monodisperse nanodomains is first formed by spin‐coating followed by solvent annealing.…”

Section: Synthetic Strategies Of Polymeric Janus Nanoparticlesmentioning

confidence: 99%

Section: Synthetic Strategies Of Polymeric Janus Nanoparticlesmentioning

confidence: 99%

Polymeric Janus Nanoparticles: Recent Advances in Synthetic Strategies, Materials Properties, and Applications

Fan

Yang

Loh

et al. 2018

Macromol. Rapid Commun.

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Polymeric Janus nanoparticles with two sides of incompatible chemistry have received increasing attention due to their tunable asymmetric structure and unique material characteristics. Recently, with the rapid progress in controlled polymerization combined with novel fabrication techniques, a large array of functional polymeric Janus particles are diversified with sophisticated architecture and applications. In this review, the most recently developed strategies for controlled synthesis of polymeric Janus nanoparticles with well-defined size and complex superstructures are summarized. In addition, the pros and cons of each approach in mediating the anisotropic shapes of polymeric Janus particles as well as their asymmetric spatial distribution of chemical compositions and functionalities are discussed and compared. Finally, these newly developed structural nanoparticles with specific shapes and surface functions orientated applications in different domains are also discussed, followed by the perspectives and challenges faced in the further advancement of polymeric Janus nanoparticles as high performance materials.

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“…19,20 In a previous work, we reported on the formation of polymeric Janus nanoparticles by graing of a homopolymer through copper(I)-catalysed alkyne-azide cycloaddition (CuAAC) on the top surface of previously cross-linked microdomains of a nanostructured block copolymer thin lm. 21 Although efficient, the CuAAC chemistry presents some drawbacks, the most obvious being the necessity to use a copperbased catalyst. This results in additional purication steps to remove the catalyst and oen requires inert conditions during the process to avoid copper(I) oxidation.…”

Section: Introductionmentioning

confidence: 99%