A facile route to poly(divinylbenzene) hollow microspheres with pyridyl group on the interior surface

Li, Guoliang; Yang, Xinlin; Bai, Feng

doi:10.1016/j.polymer.2007.03.066

Cited by 33 publications

(22 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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.

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization

Chang

Stride

Edirisinghe

2010

J. R. Soc. Interface.

View full text Add to dashboard Cite

show abstract

“…Previous work from our group established formation of monodisperse, cross‐linked particles from a broad range of styrenic, acrylic, maleic anhydride, and maleimide monomers. [ 5,7–11 ] The technique has since been applied in other groups to form particles with a range of compositions, [ 11–14 ] methods of polymerization including photo‐initiation, [ 15 ] and distillation‐precipitation, [ 16,17 ] and for use in HPLC and solid‐phase extractions. [ 18–20 ]…”

Section: Introductionmentioning

confidence: 99%

Tunable polymer microgel particles and their study using microscopy and real‐time deformability cytometry

Sinjari

Freitag

Herold³

et al. 2020

Journal of Polymer Science

View full text Add to dashboard Cite

We report the preparation and mechanical properties of highly swellable, spherical polymer microgels synthesized by precipitation copolymerization of divinylbenzene‐55 (DVB), 4‐methylstyrene (4MS), and maleic anhydride (MA) at different cross‐linker contents, in a range of methylethylketone (MEK) and heptane solvent mixtures. Microgels were characterized by optical and confocal microscopy, and their mechanical properties tested using real‐time deformability cytometry (RT‐DC), a technique developed to analyze cell properties by measuring deformation under shear stress. Hydrolysis of anhydride groups gave microgels with diameters ranging from 10 to 22 μm when swollen in saline, depending on vol% MEK and cross‐linker loading. Young's moduli of the microgels could be tuned from 0.8 to 10 kPa by adjusting cross‐linker content and MEK/heptane solvent composition, showing an inverse relationship between the effects of vol% MEK and %DVB on microgel properties. These microgels also show strain‐stiffening in response to increasing shear stresses. Extension of the RT‐DC method to the study of polymer colloids thus enables high‐throughput analysis of microgels with tunable mechanical characteristics.

show abstract

“…In previous work, suspension and dispersion polymerization, emulsion polymerization, and membrane emulsification polymerization were employed to prepare DVB microcapsules in the size ranging from several micrometers to about 100 mm [15][16][17][18][19][20][21]. Comparison with microspheres synthesized by conventional suspension polymerization showed that bottom-up microfluidic synthesis provided the better control over the dimension and internal structure of the capsules [9,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Microfluidic‐assisted controllable formation of millimeter‐scale poly(divinylbenzene) foam shells

Wang

Zhu

Shao

et al. 2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

We demonstrated a practical microfluidic approach to fabricate extremely monodisperse millimeter‐sized poly(divinylbenzene) (PDVB) foam shells with the comparable double emulsion templates. At millimeter scale, the emulsification process was more complex and more difficult to control due to the very large characteristic sizes and velocities. A new kind of three‐dimension co‐axial microfluidic chip including a Y‐shaped compound channels was designed to maintain more stable and robust flow field and regular emulsification. The hydrodynamic features of the double‐emulsion droplet formation were investigated. The results showed perfect encapsulation and continuous emulsification could be obtained by one‐step dripping (Caouter ∈ (0.018,0.09)). The size of the outlet channel would be comparable with the target droplet. Besides, droplet diameters could similarly be plotted as a function of capillary number close to the general microfluidic ones. After photo‐polymerization and supercritical drying, spherical and concentric PDVB foam shells were obtained to satisfy the inertial fusion energy experiments with large diameter (3–5.45 mm), thin wall thickness (50–250 μm), low density (50–300 mg/cm3), and a less than 0.1% polydispersity. POLYM. ENG. SCI., 58:1184–1192, 2018. © 2017 Society of Plastics Engineers

show abstract

A facile route to poly(divinylbenzene) hollow microspheres with pyridyl group on the interior surface

Cited by 33 publications

References 25 publications

Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization

Controlling the thickness of hollow polymeric microspheres prepared by electrohydrodynamic atomization

Tunable polymer microgel particles and their study using microscopy and real‐time deformability cytometry

Microfluidic‐assisted controllable formation of millimeter‐scale poly(divinylbenzene) foam shells

Contact Info

Product

Resources

About