Effect of formation of micro reaction locations (MRLs) on properties of polyvinylidene fluoride (PVDF) membranes
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Micro reaction locations (MRLs) formed in membrane impact the integrated properties of membrane. In this paper, in order to form effective MRLs in PVDF membrane which performs attractive properties, Y x Fe y Zr 1-x-y O 2 solid superacid coated TiO 2 nanotubes (MSYFZr-TiNs) modified by sodium dodecylbenzene sulfonate (SDBS) are embedded into PVDF to prepare MSYFZr-TiNs/PVDF composite membranes with effective MRLs inside channels and on the surface of membranes. MSYFZr-TiNs and MSYFZr-TiNs/PVDF composite membranes are characterized and tested. The results show that Y x Fe y Zr 1-x-y O 2 solid superacid with stable tetragonal phase reaches a hammett acidity of âˆ’ 16.468, decomposing inorganic pollutants or restraining their formation inside channels and surface. The MSYFZr-TiNs/PVDF composite membranes with MRLs perform attractive anti-compaction and anti-fouling properties through MRLs. The water contact angle, stable degradation ratios for oil and Fe 2 O 3 are 36.5Â°, 13.2% and 12.1%, respectively. Furthermore, when treating oily wastewater, the membrane permeate flux and oil retention ratio are 354 L m âˆ’2 h âˆ’1 and 93.48%, respectively. Therefore, MSYFZr-TiNs/PVDF composite membranes will possess desirable application in water cleaning.
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