Hollow MCM-41 microspheres derived from P(St-MMA)/MCM-41 core/shell composite particles

Zhao, Yangsheng; Wang, Hua; Liu, Yongmei; Ye, Jun-Ling; Shen, Shubao

doi:10.1016/j.matlet.2008.06.054

Cited by 23 publications

(7 citation statements)

References 14 publications

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“…17 Much effort has been devoted to the fabrication of HMSs. [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] Reported experimental results show that synthesis conditions need to be carefully and precisely chosen, controlled and adjusted to fabricate well-defined HMSs with ordered mesochannels aligned perpendicular to the shell surface and good dispersity (no agglomerations), and in fact, it is still difficult so far to obtain such HMSs. Various hard spheres were used as the templates for hollow interiors.…”

Section: Hollow Mesoporous Silica Spheresmentioning

confidence: 99%

“…However, severe agglomeration exists among the particles. 18 Hollow MCM-41 microspheres with little agglomeration were fabricated by Zhao et al 19 using a poly(styrene-methyl mathacrylate) latex with negative charge and C 16 TAB as dualtemplates via adding silica source in batches in a soap-free latex media. Zhang's group successfully fabricated HMSs through directed surface sol-gel process of TEOS on the template of coreshell microspheres of polystyrene-co-poly(4-vinylpyridine) (PS-co-P4VP) in the presence of C 16 TAB in neutral aqueous solution at room temperature.…”

Section: Hollow Mesoporous Silica Spheresmentioning

confidence: 99%

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Spherical silica micro/nanomaterials with hierarchical structures: Synthesis and applications

2011

Nanoscale

184

121

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This paper reviews the progress made recently in synthesis and applications of spherical silica micro/nanomaterials with multilevel (hierarchical) structures. The spherical silica micro/nanomaterials with hierarchical structures are classified into four main structural categories that include (1) hollow mesoporous spheres, (2) core-in-(hollow porous shell) spheres, (3) hollow spheres with multiple porous shells and (4) hierarchically porous spheres. Due to the complex structures and being focused on spherical silica micro/nanomaterials, some novel methods based on the combination of two routine methods or two surfactants, and some special synthetic strategies are proposed to produce the spherical silica micro/nanomaterials with hierarchical structures. Compared with the same-sized solid, porous or hollow silica spheres, these fantastic spherical silica micro/nanomaterials with hierarchical structures exhibit enhanced properties which may enable them to be used in broad and promising applications as ideal scaffolds (carriers) for biological, medical, and catalytic applications.

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Section: Hollow Mesoporous Silica Spheresmentioning

confidence: 99%

Section: Hollow Mesoporous Silica Spheresmentioning

confidence: 99%

Spherical silica micro/nanomaterials with hierarchical structures: Synthesis and applications

2011

Nanoscale

184

121

View full text Add to dashboard Cite

show abstract

“…DFT or some careful estimation might be recommended to obtain more accurate values. However, because the BJH method has been widely applied in many reports, , including the references of this study, , the BJH method has been chosen to evaluate the pore size.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, a number of potential applications as “microreactors” exist in the fields of chemistry, biotechnology, and materials science. − To date, a variety of chemical and physicochemical approaches have been employed to fabricate hollow capsules with various types of shells. For example, oxides, carbon, zeolites, and polymers have been reported. − Mesoporous silica capsules are thought to be a particularly attractive structure because of the high surface area, tunable pore size, low toxicity, and mechanical and thermal stability. − …”

Section: Introductionmentioning

confidence: 99%

Mesoporous Microcapsules with Decorated Inner Surface: Fabrication and Photocatalytic Activity

et al. 2010

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A simple and versatile strategy has been employed to fabricate a "microreactor" consisting of nanoparticles encapsulated in a hollow core of monodispersed mesoporous silica shell. First, based on our synthesis method for monodispersed silica spheres with radially aligned mesopores, hollow mesoporous silica spheres have been synthesized using amino modified polystyrene beads as a template. We then found that introduction of metal oxide precursor into the mesoporous silica spheres using the incipient wetness technique leads to selective formation of nanoparticles into the core of the hollow spheres. Using this strategy, inorganic nanoparticles (TiO 2 and Fe 2 O 3 ) are confined into the hollow cores, with high loading and high dispersion, to which widely accessible mesoporous channels were connected. The loading contents of TiO 2 and Fe 2 O 3 were 40.2 and 36.4 wt %, respectively. These values were considered quite high when compared to values previously reported for similar materials. The photocatalytic activity of TiO 2 encapsulated silica capsules in the degradation of methyl orange was examined. The decomposition rate, especially at the initial reaction stage, for this capsule was considerably faster than that for other mesoporous silica-based TiO 2 /SiO 2 composites. The methodology described here is versatile and convenient and thus can be extended to a broad range of guest species for high-performance catalysis, adsorption, and energy conversion materials.

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“…Preparation of structured latex particles with predetermined morphologies and a variety of functions has attracted interests of numerous scientists for many years. 1 –5 Due to their structural and chemical tailorability, these polymer materials are widely used in coating, adhesives, paints, and impact modifiers. 6 –9 Core–shell structural modifiers as typical latex particles are usually prepared by a two-stage emulsion polymerization process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a monodisperse poly (N-phenylmaleimide–acrylonitrile–styrene) structural nanolatex for heat-resistant modification of PVC

Wang

Qiu

Cheng

et al. 2018

Journal of Thermoplastic Composite Materials

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A monodisperse poly ( N-phenylmaleimide–acrylonitrile–styrene) (PNAS) nanolatex was synthesized via seed microemulsion polymerization. The obtained PNAS nanolatex was then directly used as an organic nanofiller to prepare polyvinyl chloride (PVC)/PNAS hybrid composite through water blending and melt compounding. The characteristics of PNAS nanolatex were analyzed by Fourier transform infrared (FTIR) spectrometer, elemental analysis, scanning electron microscope, transmission electron microscope (TEM), dynamic laser lighting scattering (DLS), differential scanning calorimetry (DSC), and thermogravimetric analyzer (TGA). FTIR and elemental analysis confirmed the formation of PNAS copolymer with high monomers conversion; meanwhile, for the PNAS nanoparticles, the morphology of a well-defined core–shell spherical structure with average diameter ranging from 156 nm to 249 nm was observed. DSC analysis and TGA indicated that both polymers had excellent compatibility, and the corresponding heat resistance of PVC was greatly improved with the addition of PNAS. When PNAS loading was 50 wt%, the glass transition temperature value of PVC/PNAS hybrid composite was increased by 22.4°C, compared with that of pristine PVC. The mechanical properties of the PVC composite were also enhanced with the addition of PNAS.

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Hollow MCM-41 microspheres derived from P(St-MMA)/MCM-41 core/shell composite particles

Cited by 23 publications

References 14 publications

Spherical silica micro/nanomaterials with hierarchical structures: Synthesis and applications

Spherical silica micro/nanomaterials with hierarchical structures: Synthesis and applications

Mesoporous Microcapsules with Decorated Inner Surface: Fabrication and Photocatalytic Activity

Preparation of a monodisperse poly (N-phenylmaleimide–acrylonitrile–styrene) structural nanolatex for heat-resistant modification of PVC

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