Preparation method of novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing modified micropore spheres
A technology of polyphenylene sulfone and microporous balls, which is applied in chemical instruments and methods, membrane technology, semipermeable membrane separation, etc. It can solve the problems of difficult dispersion and degradation of membrane performance, and achieve improved separation performance and high selectivity , the effect of great development potential
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[0019] The invention provides a ZIF-8 type microporous ball-filled polyphenylsulfone membrane used for nanofiltration and separation of organic solutions and a preparation method thereof. First, synthesize nano-scale ZIF-8 particles and ZIF-8 type microporous spheres, and then add the unmodified polyacrylate carboxyl microspheres, ZIF-8 particles, and ZIF-8 type microporous spheres to polyphenylene in a certain proportion. The composite membrane is obtained by post-processing in the membrane-forming liquid of the base sulfone.
[0020] Synthesis of ZIF-8 type microporous ball: 1.95g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL methanol to obtain a zinc salt solution, 4.9 g 2-methylimidazole was dissolved in 100 mL methanol to prepare a 2-methylimidazole solution, 1.0 g polyacrylate carboxyl microspheres were added to 100 mL methanol to disperse Evenly. Mix the microsphere dispersion with the zinc salt solution, stir at 30℃, 150 r / min in a constant temperature oscillator for 24 ho...
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