US 12,290,787 B2
Light-driven filtration antibacterial composite membrane and preparation method and use thereof
Ting-Ting Li, Tianjin (CN); Lu Yang, Tianjin (CN); Heng Zhang, Tianjin (CN); Bo Gao, Tianjin (CN); Jia-Horng Lin, Tianjin (CN); and Ching-Wen Lou, Tianjin (CN)
Assigned to Tiangong University, Tianjin (CN); Minjiang University, Fujian (CN); and Tianjin Yuzhan International Trade Co., Ltd., Tianjin (CN)
Filed by Tiangong University, Tianjin (CN); Minjiang University, Fujian (CN); and Tianjin Yuzhan International Trade Co., Ltd., Tianjin (CN)
Filed on Apr. 18, 2022, as Appl. No. 17/723,220.
Prior Publication US 2022/0331746 A1, Oct. 20, 2022
Int. Cl. B01D 69/02 (2006.01); B01D 67/00 (2006.01); B01D 69/12 (2006.01); B01D 69/14 (2006.01); B01D 71/44 (2006.01); B01D 71/48 (2006.01)
CPC B01D 69/02 (2013.01) [B01D 67/0011 (2013.01); B01D 67/002 (2013.01); B01D 67/0088 (2013.01); B01D 67/0095 (2013.01); B01D 69/12 (2013.01); B01D 69/141 (2013.01); B01D 71/44 (2013.01); B01D 71/48 (2013.01); B01D 2323/08 (2013.01); B01D 2323/12 (2013.01); B01D 2323/14 (2013.01); B01D 2323/26 (2013.01); B01D 2323/36 (2013.01); B01D 2323/39 (2013.01); B01D 2325/48 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for preparing a light-driven filtration antibacterial composite membrane, comprising:
step 1): mixing dichloromethane and N,N-dimethylformamide evenly to obtain a first solution; adding polycaprolactone (PCL) particles to the first solution, and stirring until being uniform to obtain an electrospinning solution; adding a zeolite imidazole framework-8 (ZIF-8) powder to the electrospinning solution, and ultrasonically dispersing for at least 1 hour to obtain a PCL/ZIF-8 spinning solution, wherein a volume ratio of dichloromethane to N,N-dimethylformamide is in the range of (1-10):(1-10), a ratio of volume parts of the first solution to mass parts of the polycaprolactone particles is in the range of (1-50):(1-10), and the PCL/ZIF-8 spinning solution contains 0.1-1.5 wt % of the ZIF-8 powder; and
step 2): spraying the PCL/ZIF-8 spinning solution onto a PPCL@PDA/TAEG melt-blown membrane to obtain the light-driven filtration antibacterial composite membrane;
wherein the PPCL@PDA/TAEG melt-blown membrane is prepared by a process comprising:
step (1): preparing a master batch of mixed polypropylene and polycaprolactone, and subjecting the master batch to a membrane-forming treatment by a melt-blown machine to obtain a melt-blown membrane;
step (2): mixing tris(hydroxymethyl)aminomethane hydrochloride, dopamine hydrochloride and deionized water to obtain a mixed solution, and adding dropwise 3-aminopropyltriethoxysilane thereto to adjust the mixed solution to have a pH of 8-9, to obtain a polydopamine solution; immersing the melt-blown membrane in the polydopamine (PDA) for 8-15 hours, taking out, washing and drying to obtain a PPCL@PDA melt-blown membrane, wherein a ratio of mass parts of tris(hydroxymethyl)aminomethane hydrochloride and mass parts of dopamine hydrochloride and volume parts of deionized water is in the range of (0.05-0.5):(0.05-0.8):(30-150);
step (3): mixing 4,4′-terephthaloyl diphthalic anhydride, polyphosphoric acid and dioxane evenly to obtain a second solution; immersing the PPCL@PDA melt-blown membrane in the second solution at a temperature of 40-100° C. for 0.5-5 hours under stirring, taking out, washing and drying to obtain a PPCL@PDA/TA antibacterial melt-blown membrane, wherein a ratio of mass parts of 4,4′-terephthaloyl diphthalic anhydride and mass parts of polyphosphoric acid and volume parts of dioxane is in the range of (0.05-0.5):(0.05-0.5):(5-50); and
step (4): mixing epigallocatechin gallate, polyphosphoric acid and dioxane evenly to obtain a third solution, and immersing the PPCL@PDA/TA antibacterial melt-blown membrane in the third solution at a temperature of 40-100° C. for 0.5-5 hours under stirring, taking out, washing and drying to obtain the PPCL@PDA/TAEG melt-blown membrane, wherein a ratio of mass parts of epigallocatechin gallate and mass parts of polyphosphoric acid and volume parts of dioxane is in the range of (0.05-0.5):(0.05-0.5):(5-50).