Templated Self-Assembly of Block Copolymers and Morphology Transformation Driven by the Rayleigh Instability

Yan, Nan; Sheng, Yuping; Liu, Hongxia; Zhu, Yutian; Jiang, Wei

doi:10.1021/la504672x

Cited by 35 publications

(35 citation statements)

References 49 publications

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“…An important contribution from the mean curvature to the microstructural evolution in polymer solutions is shown in a recent work of Yan et al [73] In this work, it is found that a polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) nanorod decomposes into several polymer-particles. An important contribution from the mean curvature to the microstructural evolution in polymer solutions is shown in a recent work of Yan et al [73] In this work, it is found that a polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) nanorod decomposes into several polymer-particles.…”

Section: Hydrodynamic Effectsmentioning

confidence: 66%

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Progress Report on Phase Separation in Polymer Solutions

et al. 2019

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.201806733.Polymeric porous media (PPM) are widely used as advanced materials, such as sound dampening foams, lithium-ion batteries, stretchable sensors, and biofilters. The functionality, reliability, and durability of these materials have a strong dependence on the microstructural patterns of PPM. One underlying mechanism for the formation of porosity in PPM is phase separation, which engenders polymer-rich and polymer-poor (pore) phases. Herein, the phase separation in polymer solutions is discussed from two different aspects: diffusion and hydrodynamic effects. For phase separation governed by diffusion, two novel morphological transitions are reviewed: "cluster-topercolation" and "percolation-to-droplets," which are attributed to an effect that the polymer-rich and the solvent-rich phases reach the equilibrium states asynchronously. In the case dictated by hydrodynamics, a deterministic nature for the microstructural evolution during phase separation is scrutinized. The deterministic nature is caused by an interfacial-tensiongradient (solutal Marangoni force), which can lead to directional movement of droplets as well as hydrodynamic instabilities during phase separation. Polymeric Porous Media

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Section: Hydrodynamic Effectsmentioning

confidence: 66%

Section: Hydrodynamic Effectsmentioning

confidence: 99%

Progress Report on Phase Separation in Polymer Solutions

et al. 2019

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“…At the later stage, the cylinder breaks into spheres with an average diameter d = 3.78 R 0 . Not only for simple liquids, the Rayleigh‐instability‐driven transformation is observed also for viscoelastic materials such as polymers …”

Section: Resultsmentioning

confidence: 97%

Fabrication, Morphology Control, and Electroless Metal Deposition of Electrospun ABS Fibers

Chiu

Chi

Liu

et al. 2016

Macro Materials & Eng

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Acrylonitrile–butadiene–styrene (ABS) is a polymer composing of acrylonitrile, butadiene, and styrene. It has been widely used in industry because of its good mechanical and physical properties. The fabrication of ABS fibers, however, has been rarely studied. Here the fabrication of ABS fibers has been reported by an electrospinning technique, in which the sizes and morphologies of the fibers can be controlled by adjusting the electrospinning conditions. The morphologies of the ABS fibers can also be transformed by annealing the fibers on poly (methyl methacrylate) (PMMA) films. After annealing, the ABS fibers gradually transform to ABS particles embedded in the PMMA films by a mechanism similar to the Rayleigh‐instability‐type transformation. To extend the applications of the electrospun ABS fibers, electroless deposition of copper is also conducted, resulting in copper‐coated ABS fibers.

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“…Compartmentalized micelles self-assemble from pure diblock 21 , triblock 1 , star 8 or comb 22 copolymers. Such structures can also be obtained from the cooperative self-assembly of block copolymer blends, such as AB/B [23][24][25][26] , AB/AC [27][28][29][30] , AB/CB 12,[31][32][33][34][35][36][37] and AB/BAB 38,39 .…”

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confidence: 99%

Controllable multicompartment morphologies from cooperative self-assembly of copolymer–copolymer blends

Wang

Sun

et al. 2017

Soft Matter

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Multicompartment nanostructures, such as microcapsules with clearly separated shell and core, are not easily accessible by conventional block copolymer self-assembly. We assess a versatile computational strategy through cooperative assembly of diblock copolymer blends to generate spherical and cylindrical compartmentalized micelles with intricate structures and morphologies. The co-assembly strategy combines the advantages of polymer blending and incompatibility-induced phase separation. Following this strategy, various nanoassemblies of pure AB, binary AB/AC and ternary AB/AC/AD systems such as compartmentalized micelles with sponge-like, Janus, capsule-like and onion-like morphologies can be obtained. The formation and structural adjustment of microcapsule micelles, in which the shell or core can be occupied by either pure or mixed diblock copolymers, were explored. The mechanism involving the separation of shell and core copolymers is attributed to the stretching force differences of copolymers which drive the arrangement of different copolymers in a pathway to minimize the total interfacial energy. Moreover, by adjusting block interactions, an efficient approach is exhibited for regulating the shell or core composition and morphology in microcapsule micelles, such as the transition from the "pure shell/mixed core" morphology to the "mixed shell/pure core" morphology in the AB/AC/AD micelle. This mesoscale simulation study identifies the key factors governing co-assembly of diblock copolymer blends and provides bottom-up insights towards the design and optimization of new a † Electronic Supplementary Information (ESI) available.

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Templated Self-Assembly of Block Copolymers and Morphology Transformation Driven by the Rayleigh Instability

Cited by 35 publications

References 49 publications

Progress Report on Phase Separation in Polymer Solutions

Progress Report on Phase Separation in Polymer Solutions

Fabrication, Morphology Control, and Electroless Metal Deposition of Electrospun ABS Fibers

Controllable multicompartment morphologies from cooperative self-assembly of copolymer–copolymer blends

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