Facile synthesis of silica/polymer hybrid microspheres and hollow polymer microspheres

Liu, Guangyu; Zhang, Han; Yang, Xinlin; Wang, Yongmei

doi:10.1016/j.polymer.2007.07.068

Cited by 88 publications

(47 citation statements)

References 39 publications

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“…drugs, markers, DNA and field-responsive agents (Dowding et al 2004;Xu & Asher 2004). In addition, the investigation of hollow polymer microspheres with different and controllable shell thickness has become increasingly important as a result of their superior mechanical properties and release behaviour in medical and pharmaceutical applications (Li, G. et al 2007;Liu, G. et al 2007;Gao et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization

Chang

Stride

Edirisinghe

2010

J. R. Soc. Interface.

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In this study, the ability to control the shell thickness of hollow polymeric microspheres prepared using electrohydrodynamic processing at ambient temperature was investigated. Polymethylsilsesquioxane (PMSQ) was used as a model material for the microsphere shell encapsulating a core of liquid perfluorohexane (PFH). The microspheres were characterized by Fourier transform infrared spectroscopy and optical and electron microscopy, and the effects of the processing parameters (flow-rate ratio, polymer concentration and applied voltage) on the mean microsphere diameter (D) and shell thickness (t) were determined. It was found that the mean diameters of the hollow microspheres could be controlled in the range from 310 to 1000 nm while the corresponding mean shell thickness varied from 40 to 95 nm. The results indicate that the ratio D : t varied with polymer concentration, with the largest value of approximately 10 achieved with a solution containing 18 wt% of the polymer, while the smallest value (6.6) was obtained at 36 wt%. For polymer concentrations above 63 wt%, hollow microspheres could not be generated, but instead PMSQ fibres encapsulating PFH liquid were obtained.

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Section: Introductionmentioning

confidence: 99%

Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization

Chang

Stride

Edirisinghe

2010

J. R. Soc. Interface.

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“…Coating the CdS QDs with a silica layer would accomplish such a requirement. The silica layer with active hydroxyl groups on the surface not only results in a stable and homogeneous dispersion in non-aqueous solvent but also behaves as an idea core for further modification and polymerization to afford the complicated silica/polymer hybrid microspheres [26,27] . Furthermore, silica coating has been proven to enhance the stability of the CdS core against the photodegradation [28] .…”

Section: Scheme 1 Synthesis Of Fluorescent Cds/sio 2 /Polymer Tri-laymentioning

confidence: 99%

“…Distillation precipitation polymerization has been proven to be a useful and versatile technique for the synthesis of monodisperse polymer microspheres with different functional groups [29][30][31] and core-shell inorganic/polymer composite/hybrid microspheres [32,27] . The previous results indicated that acetonitrile met the solvency conditions required for the formation of the narrow or monodisperse polymer microspheres [29][30][31] and core-shell microspheres [27,32] : that was, it dissolved the monomer but precipitated the forming polymer network.…”

Section: Preparation Of Cds/sio 2 /Pegdma Tri-layer Hybrid Nanospherementioning

confidence: 99%

Synthesis of CdS/SiO2/polymer tri-layer fluorescent nanospheres with functional polymer shells

et al. 2012

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Tri-layer CdS/SiO 2 /polymer hybrid nanospheres were synthesized by distillation precipitation polymerization of either ethyleneglycol dimethacrylate (EGDMA) or EGDMA together with comonomers having different functional groups, such as methacrylic acid, 4-vinylpyridine and 2-hydroxyethylmethacrylate, in the presence of 3-(methacryloxy)propyl trimethoxysilane (MPS)-modified CdS/SiO 2 nanoparticles as seeds in acetonitrile with 2,2′-azobisisobutyronitrile (AIBN) as initiator. In this approach, MPS-modified inorganic seeds were prepared by the modification of CdS/SiO 2 nanoparticles via the self-condensation reaction between the hydroxyl groups of sinaols, in which the CdS/SiO 2 nanoparticles were afforded by a reverse microemulsion technique for the synthesis of CdS core nanoparticles with the subsequent coating of silica layer. The polymer shell-layers encapsulated over the MPS-modified CdS/SiO 2 inorganic seeds via the efficient capture of the monomers and oligomers from the solution with the aid of the vinyl groups incorporated by the MPS modification, in which the polymer shell-thickness and functional groups including carboxyl, pyridyl and hydroxyl, were facilely controlled by the feed of EGDMA as well as the types of comonomers used for the polymerization. These nanospheres were characterized by transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), fluorescence spectroscopy and zeta potential.

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“…Among these methods, emulsion polymerization may be one of the most effective procedures for the preparation of these nanocomposites [14,15]. It presents several advantages in controlling and constructing morphologies of the nanocomposites, such as daisy-shaped [16], 2 raspberry-like [17,18] and core-shell [19,20]. Reculusa and co-workers [16,17] reported the synthesis of silica/polystyrene nanocomposite latexes via emulsion polymerization in the presence of nonionic surfactant, initiator, and prefunctionalized silica beads, involving daisy-shaped, multipod-like and raspberry-like structures.…”

Section: Introductionmentioning

confidence: 99%

“…Mahdavian et al [19] prepared the latex containing core-shell nanostructure hybrid of copolymer and inorganic nanoparticles via semi-batch emulsion polymerization. Liu and coworkers [20] synthesized monodisphere silica/polydivinylbenzene (silica/PDVB) and silica/poly(ethyleneglycol dimethacrylate) (silica/PEGDMA) core-shell hybrid microspheres with 3-(methacryloxy) propyltrimethoxysilane (MPS) functionalized silica as core and PDVB or PEGDMA as the shell. Although a wealth of effort has been paid on the incorporation of silica nanoparticles into acrylate copolymers, it still remains relatively unexplored with respect to the mechanism and morphology of nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Probing superficial and mechanical behaviors of nanosilica incorporated poly(acrylate) hybrid latexes

Chen

Wang²,

Yan³

et al. 2010

E-Polymers

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Abstract:We reported the synthesis of nanosilica/poly(acrylate) (PA) core-shell hybrid latexes via emulsion polymerization with nanosilica as the core and acrylic copolymer as the shell. Firstly, the nanosilica was surface-functionalized with the coupling agent 3-aminopropyltriethoxysilane (APTS). Then the nanosilica tethered APTS (SIAP) further connected to acrylate monomer by covalent bond during emulsion polymerization, leading to the formation of nanocomposite PA latexes. The microstructures of obtained nanosilica/PA hybrids (SIAP/PA) were characterized by attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR), FT-IR imaging, transmission electron microscopy (TEM) and atomic force microscopy (AFM) in detail. The FT-IR imaging indicated the perfect compatibility between the core and the shell. Additionally, the properties of hybrid films were investigated by water contact angle analysis and mechanical property measurement. The SIAP/PA composites exhibit hydrophobic behavior, enhanced tensile strength (about 1.5 times) and high elongation (1262%).

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Facile synthesis of silica/polymer hybrid microspheres and hollow polymer microspheres

Cited by 88 publications

References 39 publications

Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization

Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization

Synthesis of CdS/SiO2/polymer tri-layer fluorescent nanospheres with functional polymer shells

Probing superficial and mechanical behaviors of nanosilica incorporated poly(acrylate) hybrid latexes

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