Pollution-resistant membrane for filling fluorine-containing amphiphilic surface-modification material and preparation method thereof

[0022] Example 1

[0023] Weigh 3.2g of polyvinylidene fluoride and 1.6g (HFBMA) 2- (EO) 98 -(PO) 67 -(EO) 98 -(HFBMA) 2 Dissolve in 15.2g N,N-dimethylacetamide, stir at 60°C for 4 hours to prepare a homogeneous casting solution. The prepared casting solution is allowed to stand at 60°C for 4 hours to degas and cool. After reaching room temperature, pour the casting solution on the glass plate to scrape the film, then put it in a room temperature water bath to solidify into a film, soak in deionized water for 24 hours to obtain the PVDF / (HFBMA) required for this experiment 4 -(EO) 98 -(PO) 67 -(EO) 98 -(HFBMA) 4 membrane. Perform the following tests.

[0024] PVDF / (HFBMA) provided by the invention 2 -(EO) 98 -(PO) 67 -(EO) 98 -(HFBMA) 2 The membrane has been analyzed by scanning electron microscopy and contact angle analysis, the membrane pores are evenly distributed, and the film-forming performance is good. Due to the common enrichment of fluorine-containing and hydrophilic segm

[0025] Example 2

[0026] Weigh 3.2g of polyvinylidene fluoride and 1.6g (HFBMA) 4 -(EO) 98 -(PO) 67 -(EO) 98 -(HFBMA) 4 Dissolve in 15.2g N,N-dimethylacetamide, stir at 60°C for 4 hours to prepare a homogeneous casting solution. The prepared casting solution is allowed to stand at 60°C for 4 hours to degas and cool. After reaching room temperature, pour the casting solution on the glass plate to scrape the film, then put it in a room temperature water bath to solidify into a film, soak in deionized water for 24 hours to obtain the PVDF / (HFBMA) required for this experiment 4 -(EO) 98 -(PO) 67 -(EO) 98 -(HFBMA) 4 membrane. Perform the following tests.

[0027] PVDF / (HFBMA) provided by the invention 4 -(EO) 98 -(PO) 67 -(EO) 98 -(HFBMA) 4 The membrane has been analyzed by scanning electron microscopy and contact angle analysis, the membrane pores are evenly distributed, and the film-forming performance is good. Due to the common enrichment of fluorine-containing and hydrophilic segm

[0032] Example 3

[0033] Weigh 3.6g polyethersulfone, 1.8g (DFHMA) 8 -(EO) 98 -(PO) 67 -(EO) 98 -(DFHMA) 8 Dissolve in 14.6g N,N-dimethylacetamide, stir at 60°C for 4 hours to prepare a homogeneous casting solution, degas the prepared casting solution statically at 60°C for 4 hours, and cool to After room temperature, pour the casting solution on the glass plate to scrape the film, then put it in a room temperature water bath to solidify into a film, soak in deionized water for 24 hours to obtain the PES / (DFHMA) required for this experiment 10 -(EO) 98 -(PO) 67 -(EO) 98 -(DFHMA) 10 membrane.

[0034] PES / (DFHMA) 8 -(EO) 98 -(PO) 67 -(EO) 98 -(DFHMA) 8 The membrane has been analyzed by scanning electron microscopy and contact angle analysis, the membrane pores are evenly distributed, and the film-forming performance is good. Due to the common enrichment of fluorine-containing and hydrophilic segments on the membrane surface, the membrane has good anti-adsorption and pollution relea