A kind of wool-like crimped electrospun nanofiber and its preparation method
A nanofiber and electrospinning technology, which is applied in electrospinning, fiber treatment, cellulose/protein conjugated artificial filament, etc., can solve the problems of difficult control of flight stretching and inability to guarantee composite fibers, etc., and achieve excellent compression back The effect of elastic energy
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Embodiment 1
[0032] A method for preparing wool-like curled electrospun nanofibers, the steps are as follows:
[0033] (1) Dissolving polyurethane elastomer and polyacrylonitrile with a mass ratio of 1:5 in N,N-dimethylformamide and magnetic stirring to prepare a mixed spinning solution with a concentration of 5wt%, wherein the stirring time 6h, the stirring speed is 500rpm, and the stirring temperature is 70°C;
[0034] (2) Place the mixed spinning solution prepared in step (1) in the liquid supply device, adjust the electrospinning process parameters, switch on the high voltage power supply, adjust the relative humidity of the spinning environment to 70%, and start the electrospinning process , and receive the obtained wool-like crimped electrospun nanofibers through the collection device; wherein, the process parameters of electrospinning are: voltage 10kV, receiving distance 5cm, perfusion speed 0.1mL / h, spinning temperature 15°C.
[0035] The final obtained wool-like curled electrosp...
Embodiment 2
[0043] A method for preparing wool-like curled electrospun nanofibers, the steps are as follows:
[0044] (1) Polyurethane elastomer and polyvinylidene fluoride with a mass ratio of 1:7 are dissolved in N,N-dimethylacetamide and magnetically stirred to obtain a mixed spinning solution with a concentration of 7wt%, wherein the stirring The time is 6h, the stirring speed is 500rpm, and the stirring temperature is 70°C;
[0045] (2) Place the mixed spinning solution prepared in step (1) in the liquid supply device, adjust the electrospinning process parameters, switch on the high voltage power supply, adjust the relative humidity of the spinning environment to 70%, and start the electrospinning process , and receive the obtained wool-like crimped electrospun nanofibers through the collection device; wherein, the process parameters of the electrospinning are: voltage 20kV, receiving distance 5cm, perfusion speed 0.4mL / h, spinning temperature 15°C.
[0046] The final obtained wool...
Embodiment 3
[0048] A method for preparing wool-like curled electrospun nanofibers, the steps are as follows:
[0049] (1) Dissolve thermoplastic polyurethane and polystyrene with a mass ratio of 2:5 in ethyl acetate and magnetically stir to prepare a mixed spinning solution with a concentration of 10wt%, wherein the stirring time is 12h and the stirring speed is 280rpm , the stirring temperature is 50°C;
[0050] (2) Place the mixed spinning solution prepared in step (1) in the liquid supply device, adjust the electrospinning process parameters, switch on the high voltage power supply, adjust the relative humidity of the spinning environment to 72%, and start the electrospinning process , and receive the obtained wool-like crimped electrospun nanofibers through the collection device; wherein, the process parameters of the electrospinning are: voltage 30kV, receiving distance 8cm, perfusion speed 0.7mL / h, spinning temperature 20°C.
[0051] The final obtained wool-like curled electrospun ...
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