Electrostatic spinning nanofiber membrane as well as preparation method thereof
A nanofiber membrane, electrospinning technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of high cost, complicated process, limited popularization and application, etc., and achieve the effect of high production efficiency and low energy consumption
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preparation example Construction
[0048] The invention provides a method for preparing an electrospun nanofiber membrane, comprising the following steps:
[0049] Dissolving the high melting point polymer in the first spinning solvent to obtain a high melting point polymer spinning solution;
[0050] dissolving the low-melting polymer in the second spinning solvent to obtain a low-melting polymer spinning solution, and the difference between the melting points of the high-melting polymer and the low-melting polymer is not less than 10°C;
[0051] performing first electrospinning on the high-melting-point polymer spinning solution to obtain a high-melting-point polymer fiber membrane;
[0052] performing second electrospinning on the low-melting-point polymer spinning solution to obtain a low-melting-point polymer fiber membrane;
[0053] The high-melting-point fiber membrane and the low-melting-point fiber membrane are combined and hot-pressed to obtain an electrospun nanofiber membrane. The temperature of th...
Embodiment 1
[0079]Dry the PET powder and PVDF powder in a vacuum oven at 110°C for 12 hours, then cool to room temperature, weigh 100g of the dried PET powder and dissolve it in a mixed solvent of 700g of trifluoroacetic acid and dichloromethane, and stir at room temperature for 12h. Obtain a transparent PET organic solution; add 1 g of nano-silica particles to the obtained PET organic solution, and ultrasonically disperse the obtained mixed solution for 6 hours to obtain a PET spinning solution for subsequent use;
[0080] Weigh 100g of dry PVDF powder and dissolve in 400g of N,N-dimethylformamide and acetone mixed solvent, stir at room temperature for 12h to obtain PVDF spinning solution, set aside;
[0081] The viscosity of the obtained spinning solution was measured to be 5.1 Pa·s, and then the PET spinning solution and the PVDF spinning solution were spun through a high-voltage electrospinning machine at a room temperature of 25°C and a relative air humidity of about 30%. During the ...
Embodiment 2
[0087] Dissolve 80g of dried polyvinylidene fluoride (PVDF) in a mixed solvent of 126g N,N-dimethylformamide (DMF) and 294g of acetone, and stir the resulting solution at room temperature for 12 hours to obtain a transparent and uniform PVDF spinning silk solution, spare;
[0088] Dissolve 80g of vacuum-dried polyethersulfone (PES) in 420g of DMF solvent, and stir and dissolve the resulting mixture in an oil bath for 12 hours to obtain a transparent and uniform PES spinning solution;
[0089] After measuring the viscosity of the spinning solution, the obtained PVDF spinning solution and PES spinning solution were mixed and cross-spun through a high-voltage electrospinning machine at a room temperature of 25°C and a relative air humidity of about 35%. During the electrospinning process of PVDF spinning solution, each Taylor cone feeding (feeding) solution speed was 2.0mL / h, the spinning voltage was 45kV, and the receiving distance was 25cm. During the electrospinning process o...
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Description
Claims
Application Information
- IPC
- D04H1/559; D04H1/728; D04H1/558
- Inventors
- 刘延波; 陈国贵