A technique for drying and storing a protein as a soluble composite thin film on the surface of an ultrafiltration membrane

Ghosh, Raja; Sadavarte, Rahul

doi:10.1016/j.memsci.2015.04.067

Cited by 1 publication

(2 citation statements)

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“…Membrane separation technology has developed rapidlydue to its low energy consumption, high efficiency, and stable operation , and is widely used in environmental protection, − biopharmaceutical, , and water treatment applications. − However, fouling has always been a multifaceted problem in membrane filtration. − Biofouling is one of the more complex fouling processes and involves biofilm formation on the membrane surface, thus reducing the membrane separation performance and increasing the operating cost of the system. , Many studies have shown that water pretreatment, membrane cleaning, , and the optimization of operating conditions can alleviate biofouling . However, development of functionalized antibacterial membranes that can inhibit or kill bacteria is a more attractive strategy due to the potential for high operational efficiencies.…”

Section: Introductionmentioning

confidence: 99%

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Antibiofouling Polyvinylidene Fluoride Membrane Functionalized by Poly(ionic liquid) Brushes via Atom Transfer Radical Polymerization

et al. 2022

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Biofouling is a multifaceted and unavoidable problem in the application of membrane separation technology. Here, we functionalized polyvinylidene fluoride (PVDF) ultrafiltration membranes with poly(ionic liquid) (PIL) brushes to provide them with antibiofouling properties. The PIL brush grafted membranes (PIL-M) were prepared via atom transfer radical polymerization (ATRP) using different ionic liquids (ILs) on the membrane surface. Four functionalized membranes with different alkyl chain lengths (C4-M, C8-M, C12-M, and C16-M) were prepared to explore the relationship between surface structure and antibacterial properties. Our results showed that all of the PIL-M had antibacterial capabilities with the highest efficiency of 84.6% for the C12-M. Moreover, the antibacterial performance was improved by increasing the ATRP reaction temperature and time. Liposome vesicles were used as the bacterial cell membrane model to evaluate the antibacterial membrane damage mechanism. IL and PIL brushes could damage cell membranes through disrupting the lipid bilayer with longer alkyl chains associated with an enhanced effect. Zeta potential measurements showed that the interference of electrostatic interactions with bacteria also played an important role in the bactericidal mechanism. Moreover, filtration experiments in a cross-flow system further indicated that PIL-M membranes have favorable antibiofouling performance, with a stable flux increase 41.7% larger than that of the pristine PVDF membrane. Our results suggest that functionalization of the membrane surface with the PIL brushes can effectively resist bacteria and thereby significantly mitigate biofouling on the PVDF membranes.

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Section: Introductionmentioning

confidence: 99%

“…Membrane separation technology has developed rapidlydue to its low energy consumption, high efficiency, and stable operation 1,2 and is widely used in environmental protection, 3−5 biopharmaceutical, 6,7 and water treatment applications. 8−11 However, fouling has always been a multifaceted problem in membrane filtration.…”

Section: ■ Introductionmentioning

confidence: 99%