Manufacturing method of porous nanofiber with controllable aperture

A nanofiber and pore size technology, which is applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve the problems that are difficult to control the pore size uniformity and hole density of porous nanofibers, and achieve uniform size, enhanced conductivity, The effect of easy spinning

Active Publication Date: 2015-12-09
苏州佩浦再生科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, porous nanofibers are widely used in the fields of filtration membranes, biotissue engineering scaffolds, drug delivery, catalysis, energy storage, sensors, etc., but in the current processing technology of porous nanofibers, it is difficult to control the pore size and Its uniformity and density of pores

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  • Manufacturing method of porous nanofiber with controllable aperture
  • Manufacturing method of porous nanofiber with controllable aperture

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Experimental program
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Embodiment 1

[0054] The manufacture method of the porous nanofiber of embodiment 1 controllable aperture

[0055] The flow chart of the method for manufacturing porous nanofibers with controllable pore size is as follows: figure 1 As shown, the specific operation steps are:

[0056] 1) Design the pore size of the porous nanofiber to be 10-800nm, and screen the inorganic salt with a particle size of 10-800nm ​​according to the pore size of the designed nanofiber;

[0057] Described inorganic salt is selected from NaCl, KCl, LiCl, FeCl 3 , ZnCl 2 , CuCl 2 , AlCl 3 、NaNO 3 、KNO 3 、LiNO 3 , Fe(NO 3 ) 3 , Zn(NO 3 ) 2 , Cu(NO 3 ) 2 , Al(NO 3 ) 3 at least one of;

[0058] 2) Take the polymer as the raw material of the nanofiber, and mix it with the screened inorganic salt at a mass ratio of 100: (3-30) (the amount of the inorganic salt can be determined according to the designed porous nanofiber pore size and pore density), Heat at 60°C to 400°C for 10min to 2h. At this time, t...

Embodiment 2

[0064] The manufacture method of the porous nanofiber of embodiment 2 controllable aperture

[0065] 1) Design the pore size of the porous nanofiber to be 400-500nm, and screen the inorganic salt NaCl with a particle size of 400-500nm according to the pore size of the designed nanofiber;

[0066] 2) Take polyethylene as the raw material of nanofibers, mix it with the screened NaCl at a mass ratio of 100:20, and heat it at 200°C for 1 hour. At this time, the polyethylene is completely melted and NaCl will not melt. It is stirred and dispersed for 1 hour; at this time, NaCl ions are evenly dispersed in polyethylene, which enhances the conductivity of molten polyethylene;

[0067] 3) Electrospinning the molten material mixed in the previous step to obtain nanofibers, NaCl particles are evenly dispersed on the obtained nanofibers; the voltage of the electrospinning is 10kV;

[0068] 4) Soak the nanofibers obtained above in 10% v / v ethanol solution for 30 minutes, dissolve the N...

Embodiment 3

[0070] The manufacture method of the porous nanofiber of embodiment 3 controllable aperture

[0071] 1) Design the pore size of the porous nanofiber to be 10-100nm, and screen the inorganic salt KCl with a particle size of 10-100nm according to the pore size of the designed nanofiber;

[0072] 2) Take polyvinylidene fluoride as the raw material of nanofibers, mix it with screened KCl at a mass ratio of 100:30, and heat it at 200°C for 30 minutes. At this time, polyvinylidene fluoride is completely melted and KCl will not melt. Stir and disperse it with a magnetic stirrer for 20 minutes; at this time, KCl ions are uniformly dispersed in the polyvinylidene fluoride, which enhances the conductivity of the molten polyvinylidene fluoride;

[0073] 3) Electrospinning the molten material mixed in the previous step to obtain nanofibers, KCl particles are evenly dispersed on the obtained nanofibers; the electrospinning voltage is 1kV;

[0074] 4) Soak the nanofibers obtained above i...

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Abstract

The invention discloses a manufacturing method of porous nanofiber with a controllable aperture. The method comprises the steps of selecting inorganic particles of corresponding size according to requirement of the aperture size of the porous nanofiber; mixing polymers with inorganic salts, heating, so that the polymers are molten, while the inorganic salts are not molten, and then mixing and dispersing; performing electrostatic spinning on molten substances, so as to obtain the nanofiber, placing the nanofiber in a solvent, so as to remove the inorganic salts from the nanofiber, and drying to obtain the porous nanofiber. Thus, the porous nanofiber with the controllable aperture is manufactured. According to the manufacturing method, the inorganic salts are used as pore-foaming agents, so as to manufacture pores which are smaller and more uniform than those of a conventional process and are more economic and environmental friendly, and the conductivity of the polymers can be enhanced, and spinning is easier to realize. According to the manufacturing method, the nanofiber is manufactured by adopting melt electrospinning, and compared with a method of manufacturing the porous nanofiber by adopting solution electrospinning, more materials are applicable.

Description

technical field [0001] The invention relates to a manufacturing process of porous nanofibers with controllable pore diameters, belonging to the field of micro-nano processing. Background technique [0002] In the application process of nanofibers, not only the diameter of the fibers is required, but also the morphology and internal morphology of the fibers are also required. How to use electrospinning technology to prepare controllable nanofibers is the focus of future research. By adjusting the electrospinning parameters or post-processing the electrospun fibers, the electrospun porous structure fiber material can be obtained simply and conveniently. The introduction of the porous structure will increase the specific surface area of ​​the fiber material, enhance the hydrophobicity of the fiber, and endow the electrostatic spinning The new excellent properties of fiber materials will greatly promote the application of nanofibers in many fields. Due to the high specific sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10D01F11/06D01F6/48D01D5/00
Inventor 朱自明黄泽峰夏远祥温尊伟梅晨江传玉王圣王新力
Owner 苏州佩浦再生科技有限公司
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