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Multi-fluid composite electrostatic spinning device

An electrospinning and multi-fluid technology, which is applied in textiles and papermaking, filament/thread forming, fiber processing, etc., can solve problems such as limitations, and achieve the effect of a wide range of applicable materials, simple devices, and broad application prospects

Inactive Publication Date: 2008-07-23
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this coaxial electrospinning technique is limited in the preparation of one-dimensional micro- and nanofibrous materials with more complex internal micro- and nanostructures and functions.

Method used

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  • Multi-fluid composite electrostatic spinning device
  • Multi-fluid composite electrostatic spinning device
  • Multi-fluid composite electrostatic spinning device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] See Figure 1~3 . A multi-fluid composite electrospinning spinneret 1 installed on the base 15 is composed of a large-diameter outer nozzle 19 and 4 small-diameter inner nozzles 13 embedded in the outer nozzle, and is made of conductive metal. The inner and outer nozzles are respectively connected to the positive high voltage or negative high voltage output from one end of a high-voltage power supply 2 with a power supply of 0-100kV through separate wires connected to the nozzle; in front of the multi-fluid composite electrospinning spinneret 1 A conductive flat metal fiber collector 3 that can move in parallel is installed at a distance of 5-50 cm. The electric field strength between the multi-fluid composite electrospinning spinneret and the fiber collector is 0.5-3.0 kV / cm; the fiber collector 3 passes through the wire Connect with the ground wire of the other end of the high-voltage power supply 2 to ensure zero potential of the fiber collector.

[0033] The inlet...

Embodiment 2

[0044] Preparation of multi-channel organic and polymeric micro- and nanotubes: the high polymer solution is used as the outer layer spinning solution, the oil immiscible with the outer layer liquid is used as the inner layer fluid, and through the device of the present invention as in Example 1, Then the product is washed to remove oil to obtain micro and nanotubes with multi-channel structure.

[0045] For example, the preparation process of two-channel acrylic fiber hollow micro and nanofibers is: dissolve 2.0g polyacrylonitrile (PAN) in 8.0g N, N-dimethylformamide (DMF), stir until completely dissolved to form a stable and uniform solution , the solution is delivered to the outer spray pipe through a liquid supply pump and a conduit; liquid paraffin (or vegetable oil, machine oil, etc.) is used as an inner layer fluid, and is delivered to two inner spray pipes through a liquid supply pump and a conduit. The composite spinneret is connected to a high-voltage positive electr...

Embodiment 3

[0048] Preparation of multi-component core-shell structure inorganic micro- and nanofibers: use the mixed solution of inorganic sol and polymer as the outer layer spinning liquid, and use the required multi-component functional materials as the inner layer fluid according to the actual situation, and pass through as in the example 1, an inorganic functional fiber material with a multi-core-shell structure is obtained.

[0049] Such as tin dioxide SnO 2 , indium oxide In 2 o 3 , zinc oxide ZnO triple core, titanium dioxide TiO 2 The preparation process of shell composite structure nanofibers is: dissolve 2.0g polyvinylpyrrolidone (PVP) in 10.0g absolute ethanol and 1.0g glacial acetic acid, stir until completely dissolved, then continue to stir and add 6.0g tetrabutyl titanate (or isopropanol titanate), and continue stirring for 1 hour to form a stable and uniform titanium sol solution. The solution is delivered to the outer spray pipe through the liquid supply pump and the...

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Abstract

The invention relates to a multi-fluid composite electrostatic spinning plant belonging to the electrostatic spinning plant field. A multi-fluid composite electric spinning nozzle is arranged on a base and comprises an outer nozzle and a plurality of inner nozzles embedded in the outer nozzle; wherein the inner nozzles and the outer nozzle are respectively connected with the positive high voltage or negative high voltage from one output end of the a high voltage supply through independent wires connecting with the nozzles; a fiber collector is arranged in front of the multi-fluid composite electric spinning nozzle and is connected the ground wire of the other end of the high voltage supply; the inner nozzles embedded in the outer nozzles are radically and evenly distributed; the inner nozzles and the outer nozzles are non-contact and the inner nozzles are non-contact neither. Spinning solution is injected from the inner nozzles and the outer nozzle respectively through a liquid pump at a continuous and controllable speed forming a composite fluid. Under the influence of the electric field produced by the high voltage supply, porous micro / nanometer tubes or multiple components composite fiber with a plurality of inner channels after pulling and solidification are formed finally from the composite fluid.

Description

technical field [0001] The invention belongs to the field of electrospinning devices, in particular to a multi-fluid composite electrospinning device for manufacturing micro- and nano-tubes with multiple internal channels or micro- and nano-fiber materials with a multi-component composite core-shell structure, Background technique [0002] Since the discovery of carbon nanotubes in the 1990s, micro and nano materials with tubular structure and micro and nano composite fiber materials with core-shell structure have been used in high-efficiency catalysis, adsorption and separation, high-sensitivity sensors, micro- and nano-fluidic devices, Drug sustained release and many other fields have broad application prospects. Electrospinning is a simple and effective method for preparing micro- and nanoscale one-dimensional materials (Reneker, D.H.Chun, I.Nanotechnology 1996, 7, 216-223), which is to place a polymer solution or melt into In a high-voltage electrostatic field, the char...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D5/34
Inventor 赵勇孙中伟江雷
Owner INST OF CHEM CHINESE ACAD OF SCI
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