Electrospinning process for manufacture of multi-layered structures
First Claim
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1. A method of forming a structure, the structure comprising a core including a first material and a sheath including a second material around said core, the method comprising the steps of:
- providing an apparatus, comprising;
a first wedge-shaped vessel having a first slit and comprising an electrically conductive material;
a second wedge-shaped vessel having a second slit, wherein the first wedge-shaped vessel is disposed inside of the second wedge-shaped vessel;
first and second fluid reservoirs containing the first and second materials, respectively, wherein the first and second fluid reservoirs are in fluid communication with the first and second wedge-shaped vessels, respectively; and
a voltage source configured to apply a voltage to at least one of the first and second materials;
activating the voltage source to apply a voltage of between 1 and 250 kV;
moving the first material from the first fluid reservoir to the first wedge-shaped vessel; and
moving the second material from the second fluid reservoir to the second wedge-shaped vessel.
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Abstract
Devices and methods for high-throughput manufacture of concentrically layered nanoscale and microscale fibers by electrospinning are disclosed. The devices include a hollow tube having a lengthwise slit through which a core material can flow, and can be configured to permit introduction of sheath material at multiple sites of Taylor cone formation formation.
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Citations
20 Claims
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1. A method of forming a structure, the structure comprising a core including a first material and a sheath including a second material around said core, the method comprising the steps of:
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providing an apparatus, comprising; a first wedge-shaped vessel having a first slit and comprising an electrically conductive material; a second wedge-shaped vessel having a second slit, wherein the first wedge-shaped vessel is disposed inside of the second wedge-shaped vessel; first and second fluid reservoirs containing the first and second materials, respectively, wherein the first and second fluid reservoirs are in fluid communication with the first and second wedge-shaped vessels, respectively; and a voltage source configured to apply a voltage to at least one of the first and second materials; activating the voltage source to apply a voltage of between 1 and 250 kV; moving the first material from the first fluid reservoir to the first wedge-shaped vessel; and moving the second material from the second fluid reservoir to the second wedge-shaped vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of forming an elongate fiber, the elongate fiber comprising a core including a first material and a sheath including a second material around said core, the method comprising the steps of:
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providing an apparatus, comprising; a first wedge-shaped vessel having a first slit and comprising an electrically conductive material; a second wedge-shaped vessel having a second slit, wherein the first wedge-shaped vessel is disposed inside of the second wedge-shaped vessel; first and second fluid reservoirs containing the first and second materials, respectively, wherein the first and second fluid reservoirs are in fluid communication with the first and second wedge-shaped vessels, respectively; a voltage source configured to apply a voltage to at least one of the first and second materials; and a collecting area having at least one electrically grounded point thereon; activating the voltage source to apply a voltage of between 1 and 250 kV; moving the first material from the first fluid reservoir to the first wedge-shaped vessel; moving the second material from the second fluid reservoir to the second wedge-shaped vessel; and collecting the elongate fiber within the collecting area. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification