Multiresponsive Microcapsules Based on Multilayer Assembly of Star Polyelectrolytes

Xu, Weinan; Ledin, Petr A.; Plamper, Felix A.; Synatschke, Christopher V.; Müller, Axel H. E.; Tsukruk, Vladimir V.

doi:10.1021/ma501853c

Cited by 45 publications

(47 citation statements)

References 69 publications

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“…98 Star polymers have also been used as components to fabricate thin-shell microcapsules. 101 The fabricated microstructures possess complex internal structures and unique stimuli-responsive behavior.…”

Section: Assembly Of Star Polyelectrolytesmentioning

confidence: 99%

Architecture, Assembly, and Emerging Applications of Branched Functional Polyelectrolytes and Poly(ionic liquid)s

Ledin

Shevchenko

et al. 2015

ACS Appl. Mater. Interfaces

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132

101

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Branched polyelectrolytes with cylindrical brush, dendritic, hyperbranched, grafted, and star architectures bearing ionizable functional groups possess complex and unique assembly behavior in solution at surfaces and interfaces as compared to their linear counterparts. This review summarizes the recent developments in the introduction of various architectures and understanding of the assembly behavior of branched polyelectrolytes with a focus on functional polyelectrolytes and poly(ionic liquid)s with responsive properties. The branched polyelectrolytes and poly(ionic liquid)s interact electrostatically with small molecules, linear polyelectrolytes, or other branched polyelectrolytes to form assemblies of hybrid nanoparticles, multilayer thin films, responsive microcapsules, and ion-conductive membranes. The branched structures lead to unconventional assemblies and complex hierarchical structures with responsive properties as summarized in this review. Finally, we discuss prospectives for emerging applications of branched polyelectrolytes and poly(ionic liquid)s for energy harvesting and storage, controlled delivery, chemical microreactors, adaptive surfaces, and ion-exchange membranes.

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Section: Assembly Of Star Polyelectrolytesmentioning

confidence: 99%

Architecture, Assembly, and Emerging Applications of Branched Functional Polyelectrolytes and Poly(ionic liquid)s

Ledin

Shevchenko

et al. 2015

ACS Appl. Mater. Interfaces

Self Cite

132

101

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“…Based on the multilayer assembly of star polyelectrolytes (PDMAEMA) with dual‐responsive (temperature and pH) properties, Tsukruk and co‐workers designed and synthesized multi‐stimuli‐responsive microcapsules with higher stability and different internal structure compared with conventional microcapsules based on linear polyelectrolytes. They demonstrated that with increasing pH, the permeability of the multi‐responsive microcapsules decreased; the overall size and permeability of the multi‐responsive microcapsules decreased with increasing temperature 196…”

Section: Multi‐stimuli‐responsive Particlesmentioning

confidence: 99%

Multi-Stimuli-Responsive Polymer Materials: Particles, Films, and Bulk Gels

Cao

Wang

2016

The Chemical Record

177

109

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Stimuli-responsive polymers have received tremendous attention from scientists and engineers for several decades due to the wide applications of these smart materials in biotechnology and nanotechnology. Driven by the complex functions of living systems, multi-stimuli-responsive polymer materials have been designed and developed in recent years. Compared with conventional single- or dual-stimuli-based polymer materials, multi-stimuli-responsive polymer materials would be more intriguing since more functions and finer modulations can be achieved through more parameters. This critical review highlights the recent advances in this area and focuses on three types of multi-stimuli-responsive polymer materials, namely, multi-stimuli-responsive particles (micelles, micro/nanogels, vesicles, and hybrid particles), multi-stimuli-responsive films (polymer brushes, layer-by-layer polymer films, and porous membranes), and multi-stimuli-responsive bulk gels (hydrogels, organogels, and metallogels) from recent publications. Various stimuli, such as light, temperature, pH, reduction/oxidation, enzymes, ions, glucose, ultrasound, magnetic fields, mechanical stress, solvent, voltage, and electrochemistry, have been combined to switch the functions of polymers. The polymer design, preparation, and function of multi-stimuli-responsive particles, films, and bulk gels are comprehensively discussed here.

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“…3d. 45,59 Hence, the rough surface created by ZIF-8 nanotemplates endowed Z-TiO 2 MCs with high mechanical strength, thus preserving the spherical shape upon drying. 27,29 Z-TiO 2 MCs were obtained after removing CaCO 3 and ZIF-8 dual templates.…”

Section: Preparation and Characterization Of Z-tio 2 Microcapsulesmentioning

confidence: 99%

MOF-templated rough, ultrathin inorganic microcapsules for enzyme immobilization

et al. 2015

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Ultrathin titania microcapsules with rough surfaces were prepared by using a metal-organic framework (ZIF-8) as one kind of hard template to mediate the structures of the microcapsule shell. Specifically, CaCO 3 particles were first coated with tannic acid (TA) followed by the deposition of hydrophobic ZIF-8 and another TA layer, the obtained particles were then assembled with protamine/TiO 2 bilayers through biomimetic mineralization. Finally, the microcapsules (Z-TiO 2 ) were obtained after simultaneously removing CaCO 3 and ZIF-8 templates using ethylenediaminetetraacetic acid (EDTA). The coordination interaction between TA and ZIF-8 ensured the robust templating which endowed the microcapsules with a rough surface and an ultrathin microcapsules shell (100 nm) with 4.4 nm pore size. Moreover, the surface roughness of microcapsules can be regulated by changing the size of ZIF-8 crystals. The microcapsules were then utilized to immobilize penicillin G acylase (PGA). And PGA@Z-TiO 2 retained 69% activity of equivalent free PGA with a loading capacity of 160 mg g À1 . The PGA@Z-TiO 2 microcapsules exhibited superior reusability: after recycling 8 times, the conversion of the enzymatic reaction remained 36.0%, which was twice higher than that of PGA@TiO 2 (14.7%). Moreover, compared with free PGA and PGA@TiO 2 microcapsules, PGA@Z-TiO 2 microcapsules exhibited higher thermal and storage stability. After storing for 60 days, the relative activity of PGA@Z-TiO 2 remained 89.6%, which was higher than that of free PGA (34.5%) and PGA@TiO 2 (73.6%). ZIF-8 can be envisioned to be a novel class of hard template for preparing a broad variety of microcapsules with different hierarchical structures. † Electronic supplementary information (ESI) available: SEM and TEM images of ZIF-8 particles, nitrogen adsorption-desorption isotherms of ZIF-8 particles, and UV-vis spectra of the assembled multilayer film. See Fig. 12 Recycling stability of PGA@Z-TiO 2 and PGA@TiO 2 (a), temperature stability (b), pH stability (c), and storage stability (d) of free PGA, PGA@Z-TiO 2 and PGA@TiO 2 MCs.

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Multiresponsive Microcapsules Based on Multilayer Assembly of Star Polyelectrolytes

Cited by 45 publications

References 69 publications

Architecture, Assembly, and Emerging Applications of Branched Functional Polyelectrolytes and Poly(ionic liquid)s

Architecture, Assembly, and Emerging Applications of Branched Functional Polyelectrolytes and Poly(ionic liquid)s

Multi-Stimuli-Responsive Polymer Materials: Particles, Films, and Bulk Gels

MOF-templated rough, ultrathin inorganic microcapsules for enzyme immobilization

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