A method for manufacturing porous nanofibers with controllable pore size
A nanofiber, pore size technology, applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve the problem of difficult to control the uniformity of the pore size of porous nanofibers and the density of the pores, and achieve uniform size, which is conducive to uniform dispersion. , the effect of enhancing conductivity
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Embodiment 1
[0054] Example 1 Manufacturing method of porous nanofibers with controllable pore size
[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 10-800 nm, and screen the inorganic salt with a particle size of 10-800 nm 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, the poly...
Embodiment 2
[0064] Example 2 Manufacturing method of porous nanofibers with controllable pore size
[0065] 1) Design the pore size of the porous nanofiber to be 400-500 nm, and screen the inorganic salt NaCl with a particle size of 400-500 nm 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 NaCl p...
Embodiment 3
[0070] Example 3 Manufacturing method of porous nanofibers with controllable pore size
[0071] 1) Design the pore size of the porous nanofiber to be 10-100 nm, and screen the inorganic salt KCl with a particle size of 10-100 nm 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 in 3% ...
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