A facile “polystyrene-dissolving” strategy to hollow periodic mesoporous organosilica with flexible structure-tailorability

Yang, Lingang; Guo, Hongli; Wang, Lingzhi; Zhang, Jinlong

doi:10.1016/j.micromeso.2016.10.010

Cited by 22 publications

(10 citation statements)

References 44 publications

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“…The drying process compresses the sulfonated PS hollow spheres into bowl-like hollow particles due to the capillary force during solvent evaporation. Recently, Yang and co-workers have reported the fabrication of hollow periodic mesoporous organosilica particles with perpendicularly ordered mesopores, using PS as sacrificial hard template for the generation of the hollow cavities [81]. The PS template was then removed by organic solvent treatment.…”

Section: (I) Polymer Template-based Methodsmentioning

confidence: 99%

The controlled synthesis of complex hollow nanostructures and prospective applications

et al. 2019

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Functionality in nanoengineered materials has been usually explored on structural and chemical compositional aspects of matter that exist in such solid materials. It is well known that the absence of solid matter is also relevant and the existence of voids confined in the nanostructure of certain particles is no exception. Indeed, over the past decades, there has been great interest in exploring hollow nanostructured materials that besides the properties recognized in the dense particles also provide empty spaces, in the sense of condensed matter absence, as an additional functionality to be explored. As such, the chemical synthesis of hollow nanostructures has been driven not only for tailoring the size and shape of particles with well-defined chemical composition, but also to achieve control on the type of hollowness that characterize such materials. This review describes the state of the art on late developments concerning the chemical synthesis of hollow nanostructures, providing a number of examples of materials obtained by distinct strategies. It will be apparent by reading this progress report that the absence of solid matter determines the functionality of hollow nanomaterials for several technological applications.

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Section: (I) Polymer Template-based Methodsmentioning

confidence: 99%

The controlled synthesis of complex hollow nanostructures and prospective applications

et al. 2019

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“…Composite particles with core–shell structures can be synthesized using different polymerization methods, for example, dispersion − and emulsion − polymerizations, mini emulsion polymerization, , reversible addition fragmentation chain transfer (RAFT) polymerization, , atom transfer radical polymerization (ATRP), or living anionic polymerization . During these procedures, the formation of monomers containing micelles results in monodisperse composite particles with core–shell structures.…”

Section: Introductionmentioning

confidence: 99%

“…Han et al used 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane-modified silica particles in different sizes for the successful synthesis of silica–polystyrene core–shell particles by emulsion polymerization . In recent studies, Yang et al synthesized core–shell particles via the encapsulation of vinyltriethoxysilane-modified silica using SDS as the emulsifier and KPS as the initiator for emulsion polymerization . Zhang et al synthesized silica–polystyrene core–shell particles with different morphologies using ethanol/water as the solvent, PVP as the emulsifier, and AIBN as the radical initiator .…”

Section: Introductionmentioning

confidence: 99%

Agglomeration-Free Preparation of Modified Silica Nanoparticles for Emulsion Polymerization—A Well Scalable Process

2017

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To prepare modified silica nanospheres for emulsion polymerization, a new agglomeration-free change of dispersion media has been developed. Nanosized silica spheres were synthesized by the Stöber method and directly modified with a silane coupling agent. To prepare these particles for subsequent polymerization, the dispersion medium was changed in a two-step process from ethanol to water without agglomeration of the particles. The emulsion polymerization leads to hemispherical single-core-structured silica-polystyrene composite particles. The thickness of the polymer shell can be altered by varying the amount of styrene. The developed change of dispersion media provides nonagglomerated modified silica particles for the encapsulation with polystyrene and enables the synthesis of narrowly distributed single-core composite particles. The developed process is a promising approach for the preparation of nanoparticles for subsequent polymerization and can be scaled-up for industrial applications.

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“…Fe 3 O 4 /SiO 2 hollow magnetic microspheres, which are often used as a carrier, usually have a pore structure, such as with big holes [16] or mesoporous [8,17], because of their higher loading capacity. Using magnetic hollow microspheres as carriers, cargo loading and release can be accomplished by constructing the appropriate pore channels.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, among the potential delivery platform materials, such as mesoporous materials [ 4 , 5 , 6 , 7 ], hollow microspheres [ 8 , 9 , 10 , 11 ] and nanotubes [ 12 , 13 ] etc., Fe 3 O 4 /SiO 2 hollow magnetic microspheres [ 14 , 15 ] have been widely used as carriers for the storage and delivery of cargo species due to their distinctive properties, such as facile functionalization, good biocompatibility, physical and chemical stability. Fe 3 O 4 /SiO 2 hollow magnetic microspheres, which are often used as a carrier, usually have a pore structure, such as with big holes [ 16 ] or mesoporous [ 8 , 17 ], because of their higher loading capacity. Using magnetic hollow microspheres as carriers, cargo loading and release can be accomplished by constructing the appropriate pore channels.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Thermoresponsive Poly(N-isopropylacrylamide-co-acrylic acid)-Grafted Hollow Fe3O4/SiO2 Microspheres with Surface Holes for BSA Release

et al. 2017

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Thermoresponsive P(NIPAM-AA)/Fe3O4/SiO2 microspheres with surface holes serving as carriers were prepared using p-Fe3O4/SiO2 microspheres with a thermoresponsive copolymer. The p-Fe3O4/SiO2 microspheres was obtained using a modified Pickering method and chemical etching. The surface pore size of p-Fe3O4/SiO2 microspheres was in the range of 18.3 nm~37.2 nm and the cavity size was approximately 60 nm, which are suitable for loading and transporting biological macromolecules. P(NIPAM-AA) was synthesized inside and outside of the p-Fe3O4/SiO2 microspheres via atom transfer radical polymerization of NIPAM, MBA and AA. The volume phase transition temperature (VPTT) of the specifically designed P(NIPAM-AA)/Fe3O4/SiO2 microspheres was 42.5 °C. The saturation magnetization of P(NIPAM-AA)/Fe3O4/SiO2 microspheres was 72.7 emu/g. The P(NIPAM-AA)/Fe3O4/SiO2 microspheres were used as carriers to study the loading and release behavior of BSA. This microsphere system shows potential for the loading of proteins as a drug delivery platform.

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A facile “polystyrene-dissolving” strategy to hollow periodic mesoporous organosilica with flexible structure-tailorability

Cited by 22 publications

References 44 publications

The controlled synthesis of complex hollow nanostructures and prospective applications

The controlled synthesis of complex hollow nanostructures and prospective applications

Agglomeration-Free Preparation of Modified Silica Nanoparticles for Emulsion Polymerization—A Well Scalable Process

Preparation and Characterization of Thermoresponsive Poly(N-isopropylacrylamide-co-acrylic acid)-Grafted Hollow Fe3O4/SiO2 Microspheres with Surface Holes for BSA Release

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