Method and product thereof for preparing highly hydrophilic PVDF filter membrane by magnetron sputtering SIO2 nanoparticles
A nano-particle and magnetron sputtering technology, applied in the field of membrane separation, to achieve uniform nano-dispersion, improve hydrophilicity, and controllable content
Active Publication Date: 2021-06-18
CHONGQING UNIV
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[0004] In view of this, the object of the present invention is to provide a kind of using magnetron sputtering SiO 2 The method for preparing highly hydrophilic PVDF filter membranes by nanoparticles can effectively solve the problem of nanoparticle agglomeration when only utilizing electrospinning to prepare inorganic nano / organic composite nanofiber membranes, and simultaneously improve the hydrophilicity of filter membranes; one of the purposes of the present invention The second is to provide the highly hydrophilic PVDF filter membrane prepared by the method
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Embodiment 1
[0024] Magnetron sputtering of SiO 2 The method for preparing highly hydrophilic PVDF filter membrane by nanoparticles comprises the following steps:
[0025] 1) First put the PVDF powder in a drying oven and dry it for 12-24 hours at a temperature of 50-80°C, then add N,N-dimethylformaldehyde to the dried PVDF powder at a mass fraction of 5%-30% Ultrasonic oscillation in amide (DMF), and then use a magnetic stirrer to set the temperature to 30-60°C and the rotation speed to 300-1000r / min to stir the solution to fully dissolve the PVDF powder in N,N-dimethylformamide (DMF), Finally, the mixed solution is left to stand for defoaming and then used for electrospinning to obtain PVDF nanofiber film; the spinning voltage is positive pressure 10-30kV, negative pressure (-1)-(-10)kV, and the nozzle is connected to the flat spinning device The distance is 10-30cm, the temperature is 25-60°C, and the humidity is 30%-70%;
[0026] 2) Put the PVDF nanofiber membrane into a blast drying...
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The invention discloses the use of magnetron sputtering SiO 2 The method and product thereof of nanoparticle preparation highly hydrophilic PVDF membrane, the present invention utilizes magnetron sputtering SiO 2 Nanoparticles improve the hydrophilicity of PVDF filter membranes. First, PVDF single nanofiber filter membranes are prepared by electrospinning, and then DC sputtering is used to sputter SiO on the surface of PVDF filter membrane fibers. 2 Nanoparticles, the PVDF nanofiber filter membrane prepared by electrospinning has a certain degree of hydrophobicity, and the SiO 2 Nanoparticles introduce hydrophilic groups on the surface of the filter membrane to improve the hydrophilicity of the filter membrane. The hydrophilic filter membrane prepared by the invention is suitable for the fields of membrane distillation, sewage treatment and oil-water separation, etc., can enhance the anti-pollution ability of the membrane, and has good practicability, and its technical scheme is simple to realize, and can be realized by simple mechanical equipment. Strong repeatability.
Description
technical field [0001] The invention belongs to the technical field of membrane separation, specifically using magnetron sputtering SiO 2 The invention relates to a method for preparing a highly hydrophilic PVDF filter membrane from nanoparticles, and also relates to a product prepared by the method. Background technique [0002] Polyvinylidene fluoride (PVDF) is favored by separation membrane researchers for its excellent chemical stability, radiation resistance, pollution resistance, heat resistance and easy film formation. However, its low surface energy and strong hydrophobicity can easily cause membrane fouling and rapid decline in membrane flux, which limits the application of PVDF membranes to a certain extent, so it is necessary to improve its hydrophilicity. [0003] The preparation methods of fiber membrane mainly include sol-gel method, phase separation method, etching method, self-assembly method and chemical vapor deposition, etc., but these methods have the di...
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IPC IPC(8): B01D69/02B01D71/34B01D67/00
CPCB01D67/009B01D69/02B01D71/34B01D2325/36
Inventor 王飞鹏穆朋万春香刘建华李剑黄正勇胡克林王开正赵琦
Owner CHONGQING UNIV