Preparation method for regularly electrostatic spinning hollow fibre

An electrospinning and electrospinning technology is applied in the field of preparation of regular electrospinning hollow fibers, and can solve the problems of difficulty in obtaining hollow fibers stably, complicated methods, etc.

Inactive Publication Date: 2008-03-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, this method is more complicated, and a special spinneret needs to be prepared. Due to the use of a two-phase system, the control of parameters in the electrospinning process is more stringent, so it is difficult to obtain hollow fibers stably.

Method used

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  • Preparation method for regularly electrostatic spinning hollow fibre

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Experimental program
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Effect test

Embodiment 1

[0029] (1) Dissolve 5.0 g of purified 3-hydroxybutyric acid and 3-hydroxyvaleric acid copolyester (PHBV) in 75 g (65 / 10) of dichloromethane / alcohol mixed solvent to obtain a transparent and uniform solution;

[0030] (2) add 20gN again, N-dimethylformamide (DMF) is mixed with spinning dope;

[0031] (3) Spinning stock solution is added into the container, extruded by micro-injection pump control, the nozzle is connected to high-voltage positive electrode, and the movable area is less than 100mm 2 The grounded microelectrode is used as the negative electrode, the electrospinning parameters are controlled at a voltage of 10kv, the nozzle aperture is 0.4mm, the solution flow rate is 2ml / h, the ambient temperature is 30°C, and the relative air humidity is 45%, and the electrospinning is carried out;

[0032] (4) The grounded microelectrode moves backwards continuously to obtain continuous regularized electrospun hollow fiber bundles;

[0033] (5) Collect the continuous hollow fib...

Embodiment 2

[0036] (1) Dissolving 12 g of purified polylactic acid (PLLA) in 68 g of dichloromethane solvent to obtain a transparent and uniform solution;

[0037] (2) add 20gN again, N-dimethylformamide (DMF) is mixed with spinning dope;

[0038] (3) Spinning stock solution is added into the container, extruded by micro-injection pump control, the nozzle is connected to high-voltage positive electrode, and the movable area is less than 100mm 2 The grounded microelectrode is used as the negative electrode, the electrospinning parameters are controlled at a voltage of 17kv, the nozzle aperture is 0.8mm, the solution flow rate is 60μl / min, the ambient temperature is 25°C, and the relative air humidity is 70%, and the electrospinning is carried out;

[0039] (4) The grounded microelectrode moves backwards continuously to obtain continuous regularized electrospun hollow fiber bundles;

[0040] (5) Collect the continuous hollow fiber bundles by winding them on the bobbin tube at a winding spe...

Embodiment 3

[0043] (1) 10 g of purified polymethyl methacrylate (PMMA) was dissolved in 60 g of acetone to obtain a transparent and uniform solution;

[0044] (2) add 30gN again, N-dimethylformamide (DMF) is mixed with spinning dope;

[0045] (3) Spinning stock solution is added into the container, extruded by micro-injection pump control, the nozzle is connected to high-voltage positive electrode, and the movable area is less than 100mm 2 The grounded microelectrode is used as the negative electrode, the electrospinning parameters are controlled at a voltage of 14kv, the nozzle aperture is 0.2mm, the solution flow rate is 10μl / min, the ambient temperature is 50°C, and the relative air humidity is 60%, and the electrospinning is carried out;

[0046](4) The grounded microelectrode moves backwards continuously to obtain continuous regularized electrospun hollow fiber bundles;

[0047] (5) Collect the continuous hollow fiber bundles by winding them on a bobbin at a winding speed of 120 r / m...

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Abstract

The present invention relates to a preparation method for regularized static electricity spinning hollow fiber, and the method comprises the procedures that: firstly, high molecular compound is dissolved in good solvent to be made into uniform solution; secondly, poor solvent is added to be dispensed into spinning raw liquid, and the volume ratio of the good solvent and the poor solvent is 10/1 to 1/3; thirdly, the spinning raw liquid is added into a container, is controlled and extruded by a micro-syringe pump, a jet opening is connected with a high voltage positive pole, a grounding microelectrode with the removable area of 0 to 100 mm 2 is taken as a negative pole, various parameters of static electricity spinning are adjusted, and the spinning raw liquid carries on the static electricity spinning; fourthly, the grounding microelectrode backwards and continuously moves, and a continuous regularized static electricity spinning hollow fiber bundle is obtained; fifthly, the continuous hollow fiber bundle obtains the regularized static electricity spinning hollow fiber through winding and collecting. The preparation method provided by the present invention is simple and feasible, and the obtained static electricity spinning hollow fiber has the potential application and the prospect in the fields such as nanowire devices, filtering materials, and composite reinforcing materials, etc.

Description

technical field [0001] The invention belongs to the field of electrospinning hollow fibers, in particular to a preparation method of regularized electrospinning hollow fibers. Background technique [0002] Electrospinning technology is an extremely convenient method to prepare ultrafine fibers. The fiber diameters that can be prepared by electrospinning range from tens of nanometers to several microns. Due to its nanoscale one-dimensional morphology and extremely high specific surface area, this ultrafine fiber will exhibit amazing properties in different fields and has great application prospects. [0003] Hollow fiber is an ultra-thin tubular structure with the same inner diameter, which can be made of polymers such as polyester, polysulfone, and polypropylene. It is mainly used in artificial dialysis and ultrafiltration devices, and can also be used as a light, fluffy and warm clothing material in China. Generally, the fiber template method is used, and the gas conduit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/24D01D1/02D01F6/62D01F6/64D01F6/04D01F6/10D01F6/60D01F2/28
Inventor 王雪芬朱美芳张锴周哲陈彦模
Owner DONGHUA UNIV
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