Deformation of raspberry-like polymer composite particles by colloidal fusion

Zhai, Shuxia; Sun, Hao; Qiu, Biwei; Zou, Hua

doi:10.1039/d0ma00090f

Cited by 7 publications

(4 citation statements)

References 50 publications

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“…The toluene solvent was selected as it can swell the particles as a good solvent for PS and subsequently be evaporated off readily. 58 This is different from previous seeded emulsion polymerization for synthesizing golf ball-like PS-PBA composite particles, in which the polymerization was conducted in homogenous ethanol/water media. 24 Moreover, it is worth noting that there are two obvious differences between the PS-SiO 2 particles in this work and the PS particles in the previous work: 24 the PS in the PS-SiO 2 particle is protected by the silica nanoparticles located in the shell, and the size of the PS-SiO 2 particle is significantly smaller than that of the PS particle (632 nm), both of which make the deformation of the PS-SiO 2 particles more challenging.…”

Section: Preparation Of Dimpled Polymer-sio 2 Nanocomposite Particlesmentioning

confidence: 88%

“…The occurrence of coalescence or colloidal fusion should be ascribed to the toluene in the interfacial swelling system, which is a good solvent for the PS component within the PS-SiO 2 nanocomposite particles. 58 Therefore, there are two cases for the generation of secondary particles: detachment of some of the ultrafine silica particles from the nanocomposite particles and partial coalescence of the nanocomposite particles. On the other hand, at higher CTAB amounts, no obvious particle coalescence and no dimpled particles were observed.…”

Section: Effect Of the Amount Of Ctab Used In The Ps-sio 2 /H 2 O Dis...mentioning

confidence: 99%

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Synthesis of dimpled polymer–silica nanocomposite particles by interfacial swelling-based seeded polymerization

Yin,

Wang,

Zou

2024

Soft Matter

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Section: Preparation Of Dimpled Polymer-sio 2 Nanocomposite Particlesmentioning

confidence: 88%

Section: Effect Of the Amount Of Ctab Used In The Ps-sio 2 /H 2 O Dis...mentioning

confidence: 99%

Synthesis of dimpled polymer–silica nanocomposite particles by interfacial swelling-based seeded polymerization

Yin,

Wang,

Zou

2024

Soft Matter

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“…More complex patch geometries can be accessed by colloidal fusion, which exploits the coordination dynamics of particles to well-defined clusters and their subsequent chemical fixation. [16,17] Other methods involve dry preparation techniques, such as glancing-angle deposition (GLAD). This technique uses metals, which are deposited via evaporation at the particle faces and can yield particles with uniform patches, even with complex patch geometries; however, it is merely restricted to metals as patch materials.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Patchy Silica Microspheres with Tailor‐Made Patch Functionality using Photo‐Iniferter Reversible‐Addition‐Fragmentation Chain‐Transfer (PI‐RAFT) Polymerization

Akarsu

Reinicke

Lehnen

et al. 2023

Small

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Their inherent directional information renders patchy particles interesting building blocks for advanced applications in materials science. In this study, a feasible method to fabricate patchy silicon dioxide microspheres is demonstrated, which they are able to equip with tailor‐made polymeric materials as patches. Their fabrication method relies on a solid‐state supported microcontact printing (µCP) routine optimized for the transfer of functional groups to capillary‐active substrates, which is used to introduce amino functionalities as patches to a monolayer of particles. Acting as anchor groups for polymerization, photo‐iniferter reversible addition‐fragmentation chain‐transfer (RAFT) is used to graft polymer from the patch areas. Accordingly, particles with poly(N‐acryloyl morpholine), poly(N‐isopropyl acrylamide), and poly(n‐butyl acrylate) are prepared as representative acrylic acid‐derived functional patch materials. To facilitate their handling in water, a passivation strategy of the particles for aqueous systems is introduced. The protocol introduced here, therefore, promises a vast degree of freedom in engineering the surface properties of highly functional patchy particles. This feature is unmatched by other techniques to fabricate anisotropic colloids. The method, thus, can be considered a platform technology, culminating in the fabrication of particles that possess locally precisely formed patches on particles at a low µm scale with a high material functionality.

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“…Generally, most of the colloidal composites can be classified into one of the following two groups: core–shell and raspberry‐like particles. [ 1 ] The unique properties of raspberry‐like composites including surface roughness, [ 2 ] surface heterogeneity, [ 3 ] and the presence of specific moieties [ 4 ] results in great number of their potential applications. Raspberry‐like composites are widely applied in catalysis, [ 5–8 ] plasmonics, [ 9–12 ] biology and medicine where they are introduced as platforms for immobilization of biomolecules, [ 13–15 ] in separation processes [ 16,17 ] and as hydrophobic coatings.…”

Section: Introductionmentioning

confidence: 99%

Hematite/Polystyrene Raspberry‐Like Microcomposites as Stable Support for Silver Nanoparticle Immobilization

Lupa

Oćwieja

Adamczyk

2021

Part & Part Syst Charact

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Among the methods utilized for the preparation of raspberry‐like microcomposites, due to its simplicity and universality, the electrostatically‐driven deposition of nanoparticles at the surface of microparticles is especially attractive. This process, leading to the formation of a single nanoparticle monolayer, is widely reported. On the other hand, no data concerning the electrostatically‐driven formation of nanoparticle bilayers at the surface of microparticles are reported. To fill this gap, the detailed investigation of the formation of silver/hematite nanoparticle bilayers at the surface of polystyrene microparticles is reported. First, the hematite/polystyrene raspberry‐like microcomposites are obtained by immobilization of hematite nanoparticles under an electrostatically‐driven process. The stability of hematite/polystyrene microcomposites at elevated temperatures up to 323 K is monitored using microelectrophoresis. No significant changes in the hematite nanoparticle layer coverage are observed after prolonged time of incubation. This proves the irreversible character of nanoparticle immobilization. Next, the hematite/polystyrene microcomposites are utilized as the interfaces for immobilization of negatively charged silver nanoparticles. This process is quantitatively described using electrokinetic measurements. The changes in the hydrodynamic diameter of microcomposites are also determined. Finally, the validity of the electrokinetic model used in this work for predicting the zeta potential of the silver/hematite/polystyrene microcomposites is confirmed.

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Deformation of raspberry-like polymer composite particles by colloidal fusion

Abstract: Raspberry-like polymer composite particles with polymer coronas were deformed to core–shell particles through the colloidal fusion method.

Cited by 7 publications

References 50 publications

Synthesis of dimpled polymer–silica nanocomposite particles by interfacial swelling-based seeded polymerization

Synthesis of dimpled polymer–silica nanocomposite particles by interfacial swelling-based seeded polymerization

Fabrication of Patchy Silica Microspheres with Tailor‐Made Patch Functionality using Photo‐Iniferter Reversible‐Addition‐Fragmentation Chain‐Transfer (PI‐RAFT) Polymerization

Hematite/Polystyrene Raspberry‐Like Microcomposites as Stable Support for Silver Nanoparticle Immobilization

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