Polymeric Janus Particles with Hierarchical Structures

Deng, Renhua; Liu, Shanqin; Liang, Fuxin; Wang, Ke; Zhu, Jintao; Yang, Zhenzhong

doi:10.1021/ma500331w

Cited by 87 publications

(102 citation statements)

References 55 publications

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“…In our previous studies, we have proved that PDP significantly influenced the structure of the PS-b-P4VP dBCP particles. 11,50 Here we show that this facile strategy can also be applied to the ABC tBCPs system. The morphological evolution of the particle as the increase of PDP content (x) is shown in Figure 1.…”

Section: Resultsmentioning

confidence: 85%

“…54−56 On the basis of the solubility parameters (δ) of solvents and polymers, different solvents affect the affinity and interactions among blocks. 11,12 Additionally, solvent vapor can be applied in postprocessing of the BCP particles. For instance, a solvent absorption annealing strategy was developed to induce the morphology evolution of PS-b-polyisoprene (PS-b-PI) particles, and transition of PI phase from lamellae to cylinder was observed.…”

Section: Introductionmentioning

confidence: 99%

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Additives Induced Structural Transformation of ABC Triblock Copolymer Particles

Yang

Wang

et al. 2015

Langmuir

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Here we report the structural control of polystyrene-b-polyisoprene-b-poly(2-vinylpyridine) (PS-b-PI-b-P2VP) asymmetric ABC triblock copolymer particles under 3D confinement by tuning the interactions among blocks. The additives, including 3-n-pentadecylphenol, homopolystyrene, and solvents, which can modulate the interactions among polymer blocks, play significant roles in the particle morphology. Moreover, the structured particles can be disassembled into isolated micellar aggregates with novel morphologies or mesoporous particles with tunable pore shape. Interestingly, the formed pupa-like PS-b-PI-b-P2VP particles display interesting dynamic stretch-retraction behavior when the solvent property is changed after partial cross-linking of the P2VP block. We further prove that such dynamic behavior is closely related to the density of cross-linking. The strategies presented here are believed to be promising routes to rationally design and fabricate block copolymer particles with desirable shape and internal structure.

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Section: Resultsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Additives Induced Structural Transformation of ABC Triblock Copolymer Particles

Yang

Wang

et al. 2015

Langmuir

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“…In the article, poly(vinyl alcohol) (PVA) was used as a surfactant, which is a critical role in determining the particle shape, and chloroform, which is a good solvent for both blocks was used to swell and anneal the ellipsoid particles to spherical particles with onion-like structures. Moreover, they reported to fabricate polymeric Janus particles with hierarchically structures by phase separation of PS-b-P4VP and homopolymer poly(methyl methacrylate) (PMMA) binary blend (Deng et al, 2014). The Janus particles were tuned by varying copolymer composition, blending ratio, solvent selectivity, and particle size and reversibly transformed by solvent-adsorption process.…”

Section: Synthesis Of Structured Block Copolymer Particlesmentioning

confidence: 99%

Nanostructured Colloidal Particles by Confined Self-Assembly of Block Copolymers in Evaporative Droplets

Kim

2015

Front. Mater.

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Block copolymers (BCPs) can create various morphology by self-assembly in bulk or film. Recently, using BCPs in confined geometries such as thin film (one-dimension), cylindrical template (two-dimension), or emulsion droplet (three-dimension), nanostructured BCP particles have been prepared, in which unique nanostructures of the BCP are formed via solvent annealing process and can be controlled depending on molecular weight ratio and interaction parameter of the BCPs, and droplet size. Moreover, by tuning interfacial property of the BCP particles, anisotropic particles with unique nanostructures have been prepared. Furthermore, for practical application such as drug delivery system, sensor, self-healing, metamaterial, and optoelectronic device, functional nanoparticles can be incorporated inside BCP particles. In this article, we summarize recent progress on the production of structured BCP particles and composite particles with metallic nanoparticles.

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“…[7][8][9] A variety of techniques have been developed for fabrication of anisotropic particles, including phase separation, [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] microfluidics, 30 controlled surface nucleation, 31 and selective surface modification based on particle monolayer, 32,33 etc. The most recognized, promising technique so far for production of polymer anisotropic particles with precise control and high throughput is based on internal phase separation during seeded emulsion polymerization.…”

Section: Introductionmentioning

confidence: 99%