Nanofiber filtering membrane as well as preparation method and application thereof
A nanofiber and filter membrane technology, applied in the field of aerosol protection, can solve the problems of inability to achieve high-efficiency aerosol capture and poor aerosol protection effect, and achieve excellent antibacterial performance, self-cleaning performance, and low filter resistance.
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Embodiment 1
[0058] The present embodiment provides a kind of nanofiber filter membrane, and its preparation method is as follows:
[0059] Preparation of nanofiber filter membrane: Weigh SiO 2 Slowly add dimethylformamide (DMF), place in an ultrasonic cleaner for 1h to make SiO 2 After uniform dispersion, add PVDF powder with a molecular weight of 200,000, place it on a thermal magnetic stirrer, heat to 50°C and stir for more than 2 hours until the PVDF is completely dissolved, then weigh ZnAc·2H 2 O is added, heated and magnetically stirred to obtain PVDF+SiO 2 (5%)+ZnAc·2H 2 O (5%) solution (percent represents SiO 2 The mass proportion is 5%, ZnAc·2H 2 The mass proportion of O is 10%). Using electrospinning method, take PVDF+SiO 2 +ZnAc·2H 2 O The spinning liquid is poured into the syringe, and the PP non-woven fabric is used as the receiving substrate. In an environment with a temperature of 25°C and a humidity of 50%, apply a high voltage of 18kV, adjust the spinning distance t...
Embodiment 2
[0064] The only difference from Example 1 is that SiO in the spinning solution 2 and ZnAc·2H 2 The mass proportion of O is different, specifically PVDF+SiO 2 (5%)+ZnAc·2H 2 O (10%), the SEM test result of nanofiber filter membrane is as figure 2 shown.
[0065] The above-mentioned nanofiber filter membrane was tested, and the experimental results showed that the aerosol filter efficiency was 93.2%, and the air resistance was 115Pa.
Embodiment 3
[0067] The only difference from Example 1 is that SiO in the spinning solution 2 and ZnAc·2H 2 The mass proportion of O is different, specifically PVDF+SiO 2 (5%)+ZnAc·2H 2 O (20%), the SEM test result of nanofiber filter membrane is as image 3 shown.
[0068] The above-mentioned nanofiber filter membrane is tested, and the experimental results show that the aerosol filter efficiency is 95%, and the air resistance is 145Pa.
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