Microstructured Materials Based on Multicompartmental Fibers

Bhaskar, Srijanani; Lahann, Joerg

doi:10.1021/ja900354b

Cited by 82 publications

(118 citation statements)

References 13 publications

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“…It is extensively used for the synthesis of non-crosslinked particles via precipitation of polymers from their solutions [243][244][245][246][247], and a limited number of reports describe monomer polymerization [248][249][250], all of which being about nonporous particles. Loscertales et al [248] successfully electrified a coaxial jet composed of two immiscible liquids, the outer one being a commercial photo-polymerizable resin.…”

Section: Other Techniquesmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

451

309

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Section: Other Techniquesmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

451

309

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“…[6][7][8] Most recently, even complex structures such as tri-axial nanofibers have also been investigated using multi-fluid electrospinning processes. [9][10][11][12] In sharp contrast, there are still very limited studies about the generation of sideby-side structures using these EHDA processes. [13][14][15][16][17][18][19][20][21] To create structures with double compartments, two types of relationships between components are feasible, one is the exterior and interior (i.e.…”

mentioning

confidence: 99%

Structure-tunable Janus fibers fabricated using spinnerets with varying port angles

Chen

et al. 2015

Chem. Commun.

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aThe preparation of Janus fibers using a new side-by-side electrospinning process is reported. By manipulating the angle between the two ports of the spinneret emitting the working fluids, Janus nanofibers with tunable structures in terms of width, interfacial area and also volume of each side can be easily fabricated.Among the different ''top-down'' processes for nanofabrication, electrohydrodynamic atomization processes (EHDA, including electrospinning, electrospraying and e-jetting printing) have the unique capability of simultaneous modulation of sizes, shapes and compartmentalization of their nanoproducts.1,2 This ability has been broadly exploited for the generation of core-shell nanostructures, both in the form of electrospun fibers, nanotubes 3-5 and electrosprayed particles or bubbles. [6][7][8] Most recently, even complex structures such as tri-axial nanofibers have also been investigated using multi-fluid electrospinning processes. [9][10][11][12] In sharp contrast, there are still very limited studies about the generation of sideby-side structures using these EHDA processes. [13][14][15][16][17][18][19][20][21] To create structures with double compartments, two types of relationships between components are feasible, one is the exterior and interior (i.e. a core-shell structure), and the other is side-by-side. The latter, being a heterojunction structure, can have an advantage for designing novel functional nanomaterials over the core-shell structures because it provides an opportunity for both components to interact with their surroundings. 22,23Side-by-side electrospinning involves a complex interplay between fluid dynamics, electrodynamics and rheology, and presents a challenge in controlling the movement in unison of two fluids in a side-by-side manner under an electrical field from spinneret to collector. To our knowledge, Gupta and Wilkes were the first to report the preparation of side-by-side polymer nanofibers, made of poly(vinyl chloride)/segmented polyurethane and poly(vinyl chloride)-poly(vinylidiene fluoride) using a spinneret consisting of two parallel Teflon capillaries.13 Lin et al. reported the preparation of self-crimping side-by-side nanofibers that spontaneously formed curled helical fibers, composed of polyacrylonitrile and polyurethane, using a homemade silicone microfluidic spinneret, which consisted of three capillary channels with two of them combined in another channel in parallel to form the side-by-side outlet. 14 Later, several publications describe the preparation of side-by-side nanofibers using spinnerets made from two syringes whose needle tips were confined in a side-byside geometry. [15][16][17][18] In all these studies it was possible to control the outlet of the double fluids in a parallel manner for successful preparation of Janus nanofibers. Using a different approach, we report here side-by-side electrospinning in which a series of spinnerets with varying port angles were exploited to create structure-tunable Janus fibers. Our initial purpose was to prepare high...

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“…Earlier work by our group established that the overall jetting behavior of core–shell jetting is determined by the shell flow resulting in excellent jet stability comparable to jets obtained in the side‐by‐side configuration 7, 12 2 a shows microfibers that have helical rails on the fiber wall.…”

Section: Resultsmentioning

confidence: 69%

“…This progress has been enabled by an arsenal of methods for the fabrication of compartmentalized microparticles have been developed, such as stop‐flow lithography by Doyle and co‐workers,8 droplet microfluidics by Weitz's groups,9 or the PRINT method by DeSimone and co‐workers 10. Similarly, electrohydrodynamic (EHD) cojetting has been widely used for preparing multicompartmental microbuilding blocks 2, 3, 4, 5, 6, 7, 11, 12, 13…”

Section: Introductionmentioning

confidence: 99%

Compartmentalized Microhelices Prepared via Electrohydrodynamic Cojetting

et al. 2018

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Anisotropically compartmentalized microparticles have attracted increasing interest in areas ranging from sensing, drug delivery, and catalysis to microactuators. Herein, a facile method is reported for the preparation of helically decorated microbuilding blocks, using a modified electrohydrodynamic cojetting method. Bicompartmental microfibers are twisted in situ, during electrojetting, resulting in helical microfibers. Subsequent cryosectioning of aligned fiber bundles provides access to helically decorated microcylinders. The unique helical structure endows the microfibers/microcylinders with several novel functions such as translational motion in response to rotating magnetic fields. Finally, microspheres with helically patterned compartments are obtained after interfacially driven shape shifting of helically decorated microcylinders.

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Microstructured Materials Based on Multicompartmental Fibers

Cited by 82 publications

References 13 publications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Structure-tunable Janus fibers fabricated using spinnerets with varying port angles

Compartmentalized Microhelices Prepared via Electrohydrodynamic Cojetting

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