High-intensity ternary gradient structure PVDF tubular ultrafilter membrane and preparation method
A technology of tubular ultrafiltration membrane and gradient structure, which is applied in the field of high-strength ternary gradient structure PVDF tubular ultrafiltration membrane and its preparation, and can solve the problem of loose bonding between the support layer and the separation layer, uneven porosity, and low bonding strength and other problems, to achieve the effect of good application prospects, large flux and long service life
Active Publication Date: 2016-02-24
广东华凯明信科技有限公司
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The invention belongs to the membrane separation material technology field, and discloses a high-intensity ternary gradient structure PVDF tubular ultrafilter membrane and a preparation method. The preparation method is as follows: PVDF powder is sintered in a tubular die, and a support layer tubular prefabricated body with a one-layer structure is formed; then PVDF powder is sintered with the prefabricated body as an outer layer, and a binary PVDF tubular base membrane with a binary gradient structure is formed; then a chemical-bonding functional Al2O3/PVDF casting membrane solution is employed to carry out coating membrane forming on the inner surface of the tubular base membrane, a separation layer is formed, and a high-intensity ternary gradient structure PVDF tubular ultrafilter membrane is prepared. The provided ultrafilter membrane is prepared through forming methods for three times, the three structures are combined tightly, the provided ultrafilter membrane has advantages of pore diameter gradient distribution, low resistance, large flux, easy reverse cleaning and the like, the mechanical properties and separation performance of the provided ultrafilter membrane are raised greatly, and the provided ultrafilter membrane has good application prospects.
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Property | Measurement | Unit |
Aperture | 0.05 ~ 0.1 | µm |
Thickness | 0.1 ~ 0.2 | mm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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