Star amphiphilic block copolymers: synthesis <i>via</i> polymerization-induced self-assembly and crosslinking within nanoparticles, and solution and interfacial properties

Qian, Sijia; Liu, Rui; Han, Guang; Shi, Kun; Zhang, Wangqing

doi:10.1039/c9py01656b

Cited by 23 publications

(15 citation statements)

References 89 publications

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“…Block copolymer (BCP) microparticles with controllable morphology have drawn increasing attention, because of their wide applications in drug release, energy storage, photonic crystals, and other fields. − Several methods have been reported for the preparation of BCP microparticles. − Recently, three-dimensional (3D) soft confined self-assembly of BCPs in emulsion droplets has been confirmed to be an effective method for generating BCPs microparticles with controllable morphology and phase structure. − In the evaporative emulsion induced 3D confined assembly, the interfacial interaction between BCP and water is one of the most critical factors to regulate the BCP microparticles’ morphology. − By adjusting the interfacial interaction, BCP microparticles with various morphologies, including pupa-like, , convex lens-like, , Janus-like, , onion-like particles, and others, , can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Shaping Block Copolymer Microparticles by pH-Responsive Core-Cross-Linked Polymeric Nanoparticles

et al. 2020

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Block copolymer microparticles with controllable morphology have drawn widespread attention owing to their promising applications in photonic materials, energy storage, and other areas. Hence, it is highly desired to achieve a controllable transformation of microparticle morphology. In this work, we report a simple method to shape the morphology of polystyrene-block-poly(dimethylsiloxane) (PSb-PDMS) microparticles, by employing core-cross-linked polymeric nanoparticles (CNPs) as cosurfactants which are synthesized through cross-linking P4VP segment of PS-block-poly(4-vinylpyridine) (PS-b-P4VP). The addition of pH-responsive CNPs makes the shape of pHinert PS-b-PDMS microparticles sensitive to pH value. The PS-b-PDMS microparticles transformed from elongated Janus pupa-like particles to onion-like particles by decreasing the pH value of the aqueous phase. The deformation mechanism is investigated by changing pH value, the weight fraction of CNPs, and surfactant property. This study provides a facile strategy to deform microparticles of pH-inert BCPs by tuning pH value, which is anticipated to be applicable to other non-pH-responsive BCP microparticles.

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Section: Introductionmentioning

confidence: 99%

Shaping Block Copolymer Microparticles by pH-Responsive Core-Cross-Linked Polymeric Nanoparticles

et al. 2020

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“…The main advantages for this method are attributed to enhanced scalability and morphological tunability when compared with traditional self‐assembly limited to dilute concentrations 218–220 . Furthermore, structural stability of polymer NPs over ranges of concentrations, pH, temperature, and so forth is required for broad applications such as drug delivery, Pickering emulsifiers and catalytic nanoreactors 212,221,222 . In situ crosslinking using monomers containing multiple vinyl groups can be advantageous over the post‐polymerization crosslinking methods since the stabilized NPs can be directly prepared.…”

Section: Polymerization Methodologies Mediated Using Orthogonal External Stimulimentioning

confidence: 99%

Orthogonal synthesis and modification of polymer materials

Shahrokhinia

Biswas

Reuther

2021

Journal of Polymer Science

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In this review, we detail the progress throughout the years toward developing truly orthogonal polymerization mechanisms and modification procedures en route to complex macromolecular structures built from synthetic polymer materials. The orthogonal modifications of polymer side‐chains and end‐groups via sequential click reactions is described providing post‐polymerization routes to functional materials and unique polymer topologies. Further, historical and modern orthogonal polymerization methodologies are thoroughly reviewed showing the evolution of the field through the decades long study of selective polymerization mechanisms that provide unique copolymer structures that are typically difficult to achieve. These include the combinations of reversible deactivation radical polymerization mechanisms with a variety of polymerization mechanisms including ring opening polymerizations, ring opening metathesis polymerizations, and cationic polymerizations, to name a few.

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“…They demonstrated that these CCS star polymers were efficient emulsifiers for oil-in-water emulsions. Zhang's group [156] developed a different strategy by combining PISA and crosslinking within linear block copolymer nanoparticles. In this case, linear block copolymer nanoparticles were first synthesized by RAFT-mediated PISA and used as seeds for further cross-linking.…”

Section: Star Block Copolymersmentioning

confidence: 99%

Expanding the Scope of Polymerization‐Induced Self‐Assembly: Recent Advances and New Horizons

Cao

Tan

Chen³

et al. 2021

Macromol. Rapid Commun.

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Over the past decade or so, polymerization-induced self-assembly (PISA) has become a versatile method for rational preparation of concentrated block copolymer nanoparticles with a diverse set of morphologies. Much of the PISA literature has focused on the preparation of well-defined linear block copolymers by using linear macromolecular chain transfer agents (macro-CTAs) with high chain transfer constants. In this review, a recent process is highlighted from an unusual angle that has expanded the scope of PISA including i) synthesis of block copolymers with nonlinear architectures (e.g., star block copolymer, branched block copolymer) by PISA, ii) in situ synthesis of blends of polymers by PISA, and iii) utilization of macro-CTAs with low chain transfer constants in PISA. By highlighting these important examples, new insights into the research of PISA and future impact these methods will have on polymer and colloid synthesis are provided.

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Star amphiphilic block copolymers: synthesis via polymerization-induced self-assembly and crosslinking within nanoparticles, and solution and interfacial properties

Abstract: The star amphiphilic block copolymer of star s-PNIPAM-b-PS is synthesized and it shows characteristics significantly different from those of the linear block copolymer counterpart.

Cited by 23 publications

References 89 publications

Shaping Block Copolymer Microparticles by pH-Responsive Core-Cross-Linked Polymeric Nanoparticles

Shaping Block Copolymer Microparticles by pH-Responsive Core-Cross-Linked Polymeric Nanoparticles

Orthogonal synthesis and modification of polymer materials

Expanding the Scope of Polymerization‐Induced Self‐Assembly: Recent Advances and New Horizons

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