PVDF membrane biofunctionalization by chemical grafting

Vitola, Giuseppe; Mazzei, Rosalinda; Fontananova, Enrica; Giorno, Lidietta

doi:10.1016/j.memsci.2014.12.004

Cited by 62 publications

(22 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, modifications of PVDF have attracted extensive attention . Thus, numerous methods such as graft copolymerization, mixing, solution or plasma treating, and surface coating have been intensively reported to change the disadvantageous properties of PVDF in recent years. Everything has two sides and UV–vis light is no exception .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of highly efficient ultraviolet absorbing PVDF membranes via surface polydopamine deposition

Dong

Liu

Xiong

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polydopamine (PDA) layers and particles self-polymerized by dopamine have ultraviolet (UV) absorbing property besides versatility and adhesive ability. Herein, a facile strategy for preparing poly(vinylidene fluoride) (PVDF) membrane coated with a thick PDA layer was developed to decrease UV transmittance through the surface modification of PVDF membrane. The PVDF membrane was modified by PDA deposition after pretreated with KOH/alcohol and KMnO 4 /KOH solution. Furthermore, we investigated the effect of coating conditions such as concentration of dopamine and Tris-HCl buffer solution, coating time, and temperature on the performance of membranes. The characterization results indicated that it is more conductive for PDA deposition on the surface PVDF-OH films than original PVDF films. Most importantly, UV transmittance of PVDF-OH film modified in dopamine solution under optimum condition for one time can decrease to as low as 0.122% at 320 nm, which showed excellent UV-shielding property.

show abstract

Section: Introductionmentioning

confidence: 99%

Fabrication of highly efficient ultraviolet absorbing PVDF membranes via surface polydopamine deposition

Dong

Liu

Xiong

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Figure ). The detailed mechanism of DAMP grafting and the characterizations carried out are discussed in our previous work . The grafted amino groups were then reacted with a large excess of glutaraldehyde (PVDF‐DAMP‐GA) to enable subsequent coupling either with amino functionalities of microgels or with amino groups of LCR (for preparation of the reference enzyme membranes).…”

Section: Resultsmentioning

confidence: 99%

“…). Pre‐functionalization of the PVDF membranes had been done in two steps using a previously reported method and leading to aldehyde groups on the surface . The amino‐modified PAAm microgels were immobilized by aldehyde–amine reaction, and unreacted aldehyde groups on the membranes surface were then quenched using ethanolamine.…”

Section: Introductionmentioning

confidence: 99%

Development of a Novel Immobilization Method by Using Microgels to Keep Enzyme in Hydrated Microenvironment in Porous Hydrophobic Membranes

Vitola

Büning

Schumacher

et al. 2016

Macromolecular Bioscience

View full text Add to dashboard Cite

Using colloidal polyacrylamide (PAAm) microgels as carriers, a novel strategy for covalent immobilization of enzymes maintained in hydrated microenvironment on/in a macroporous surface-functionalized hydrophobic polyvinylidene fluoride (PVDF) membrane is developed. The PAAm microgels are synthesized by inverse miniemulsion polymerization, and first the parameters are investigated which are suited to obtain particles in the desired size range, 100-200 nm, with narrow size distribution. Amino functions are then imparted to the microgels applying the Hofmann reaction. The modification is confirmed by Fourier-transform infrared spectroscopy analysis, ninhydrin test, and elemental analysis. In addition, functionalized microgels are characterized by dynamic light scattering. The amino-functionalized PAAm microgels are then immobilized on pre-modified PVDF membrane having aldehyde functionalities on the surface. Afterward, unreacted aldehyde groups still present on the membrane where quenched by ethanolamine and the enzyme lipase from Candida rugosa (LCR) is subsequently immobilized on the microgels loaded PVDF membrane via glutaraldehyde cross-linking, exploiting the free amino groups on immobilized microgels. Catalytic efficiency of LCR immobilized by this strategy is evaluated using para-nitrophenyl palmitate as substrate and compared with LCR directly immobilized on PVDF membrane without microgels. Results show that LCR immobilized by means of microgels exhibits better performance with a 2.3-fold higher specific biocatalytic activity.

show abstract

“…Polyvinylidene fluoride (PVDF) has become one of the popular membrane materials for CO 2 membrane contactors on account of its good hydrophobicity, high porosity, and suitable membrane pore size . Meanwhile, as an enzyme support, it has also some advantages such as high mechanical strength, excellent chemical stability, and acid and alkali resistance . Hou at el.…”

Section: Introductionmentioning

confidence: 99%

Immobilization of carbonic anhydrase on polyvinylidene fluoride membranes

Sun

Wei

Wang

et al. 2018

Biotech and App Biochem

View full text Add to dashboard Cite

In recent years, the application of carbonic anhydrase (CA) in CO removal has attracted great interest. However, obtaining high enzyme recovery activity is difficult in existing immobilization techniques. In this work, water plasma-treated poly(vinylidene fluoride) (PVDF) membranes were modified via 3-aminopropyl triethoxy silane (KH550) or γ-(2, 3-epoxypropoxy) propyl trimethoxy silane (KH560), and then CA was attached. The immobilization process was optimized, and the catalytic properties of PVDF-attached CA were characterized. The maximum activity recovery of PVDF-KH550-CA was 60%, whereas that of PVDF-KH560-CA was 33%. The K values of PVDF-KH550-CA, PVDF-KH560-CA, and free enzyme were 9.97 ± 0.37, 12.5 ± 0.2, and 6.18 ± 0.23 mM, respectively, and their K /K values were 206 ± 2, 117 ± 5, and 488 ± 4 M ·Sec . PVDF-attached CA shows excellent storage stability and reusability, and their half-life values were 82 and 78 days at 4 °C. At 25 °C, they were 50 and 37 days, respectively. PVDF-KH550-CA and PVDF-KH560-CA retained approximately 85% and 72% of the initial activity after undergoing 10 cycles. In the presence of them, the generation rates of CaCO were 76% and 65% of the free CA system, which were 1.6 and 1.3 times that of the blank system, respectively. Its role in accelerating CO sequestration holds great promise for its practical application.

show abstract

PVDF membrane biofunctionalization by chemical grafting

Cited by 62 publications

References 24 publications

Fabrication of highly efficient ultraviolet absorbing PVDF membranes via surface polydopamine deposition

Fabrication of highly efficient ultraviolet absorbing PVDF membranes via surface polydopamine deposition

Development of a Novel Immobilization Method by Using Microgels to Keep Enzyme in Hydrated Microenvironment in Porous Hydrophobic Membranes

Immobilization of carbonic anhydrase on polyvinylidene fluoride membranes

Contact Info

Product

Resources

About