Polytetrafluoroethylene and Polyvinylidene fluoride differ as protein binding membrane materials
The retrieved evidence mentions polyvinylidene fluoride and polytetrafluoroethylene independently in various membrane filtration applications and discusses protein interactions with PVDF or PTFE separately, but does not provide a direct comparison of their behavior specifically as protein binding membrane materials.
rails:sufficiency:partial_only:for=0+5p:against=0+0p | v55:multi_partial_one_side:lean=lean_partial:for:one_sided
Electrospun Fibers of Polybutylene Succinate/Graphene Oxide Composite for Syringe-Push Protein Absorption Membrane. 2021. https://doi.org/10.3390/polym13132042
The adsorption of proteins on membranes has been used for simple, low-cost, and minimal sample handling of large volume, low protein abundance liquid samples. Syringe-push membrane absorption (SPMA) is an innovative way to process bio-fluid samples by combining a medical syringe and protein-absorbable membrane, which makes SPMA a simple, rapid protein and proteomic analysis method. However, the membrane used for SPMA is only limited to commercially available protein-absorbable membrane options. To raise the method’s efficiency, higher protein binding capacity with a lower back pressure membrane is needed. In this research, we fabricated electrospun polybutylene succinate (PBS) membrane and compared it to electrospun polyvinylidene fluoride (PVDF). Rolling electrospinning (RE) and non-rolling electrospinning (NRE) were employed to synthesize polymer fibers, resulting in the different characteristics of mechanical and morphological properties. Adding graphene oxide (GO) composite does not affect their mechanical properties; however, electrospun PBS membrane can be applied as a filter membrane and has a higher pore area than electrospun PVDF membrane. Albumin solution filtration was performed using all the electrospun filter membranes by the SPMA technique to measure the protein capture efficiency and staining of the protein on the membranes, and these membranes were compared to the commercial filter membranes—PVDF, nitrocellulose, and Whatman no. 1. A combination of rolling electrospinning with graphene oxide composite and PBS resulted in two times more captured protein when compared to commercial membrane filtration and more than sixfold protein binding than non-composite polymer. The protein staining results further confirmed the enhancement of the protein binding property, showing more intense stained color in compositing polymer with GO.
See more details
Performance Comparison between Polyvinylidene Fluoride and Polytetrafluoroethylene Hollow Fiber Membranes for Direct Contact Membrane Distillation. 2019. https://doi.org/10.3390/membranes9040052
Increasing water demand coupled with projected climate change puts the Southwestern United States at the highest risk of water sustainability by 2050. Membrane distillation offers a unique opportunity to utilize the substantial, but largely untapped geothermal brackish groundwater for desalination to lessen the stress. Two types of hydrophobic, microporous hollow fiber membranes (HFMs), including polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF), were evaluated for their effectiveness in direct contact membrane distillation (DCMD). Water flux and salt rejection were measured as a function of module packing density and length in lab-scale systems. The PVDF HFMs generally exhibited higher water flux than the PTFE HFMs possibly due to thinner membrane wall and higher porosity. As the packing density or module length increased, water flux declined. The water production rate per module, however, increased due to the larger membrane surface area. A pilot-scale DCMD system was deployed to the 2nd largest geothermally-heated greenhouse in the United States for field testing over a duration of about 22 days. The results demonstrated the robustness of the DCMD system in the face of environmental fluctuation at the facility.
Modify the Polyvinylidene Fluoride: Polyacrylonitrile Blend Nanofiber to Improve Membrane Filtration Efficiency.. 2023. https://doi.org/10.21203/rs.3.rs-3705257/v1
Abstract With the increasing sources of water pollution, there has been great interest in improving the efficiency of filtration membranes, which comes from obtaining a porous and high membrane surface area by electrospinning. In this research, we worked on producing a membrane from polyvinylidene fluoride (PVDF) and polyacrylonitrile (PAN), then strengthening it with titanium isopropoxide (Tipp) and converting PAN to amidoxime polyacrylonitrile (AOPAN) by reaction. Many physical tests were conducted, such as wettability, field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) to determine the efficiency of the membranes. The developed membrane has high crystalline and thermal properties, and the surface is characterized by high wettability compared to the properties of the undeveloped membrane. On the other hand, the developed membrane has a low pore size and high porosity, which increases the water flux rate to 804 (Lm -2 .h -1 ) and reduces the milk protein flux rate to 145 (Lm -2 .h -1 ), besides increasing the flux recovery ratio, solute rejection, and rejection rate to 91.79%, 89.61%, and 81.97% respectively.
Polyvinylidene fluoride. https://en.wikipedia.org/wiki/Polyvinylidene_fluoride
Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. Its chemical formula is (C2H2F2)n. PVDF is a specialty plastic used in applications requiring the highest purity, as well as resistance to solvents, acids and hydrocarbons. PVDF has a lower density of 1.78 g/cm3 in comparison to o Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. Its chemical formula is (C2H2F2)n. PVDF is a specialty plastic used in applications requiring the highest purity, as well as resistance to solvents, acids and hydrocarbons. PVDF has a lower density of 1.78 g/cm3 in comparison to other fluoropolymers, like polytetrafluoroethylene. It is available in the form of piping products, sheet, tubing, films, plate and an insulator for premium wire. It can be injected, molded or welded and is commonly used in the chemical, semiconductor, medical and defense industries, as well as in lithium-ion batteries. It is also available as a cross-linked closed-cell foam, used increasingly in aviation and aerospace applications, and as an exotic 3D printer filament. It can also be used in repeated contact with food products, as it is FDA-compliant and non-toxic below its degradation temperature. As a fine powder grade, it is an ingredient in high-end paints for metals. These PVDF paints have extremely good gloss and color retention. They are in use on many prominent buildings around the world, such as the Petronas Towers in Malaysia and Taipei 101 in Taiwan, as well as on commercial and residential metal roofing. In biotechnology, PVDF membranes are used to immobilize proteins for a western blot. PVDF is also used as a binder component for the carbon electrode in supercapacitors and for other electrochemical applications.
Performance Comparison between Polyvinylidene Fluoride and Polytetrafluoroethylene Hollow Fiber Membranes for Direct Contact Membrane Distillation - PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC6523259/
for Robust Membrane Distillation. Environ. Sci. Technol. Lett. 2014;1:443–447. doi: 10.1021/ez500267p. [ DOI ] [ Google Scholar ] 35. Lee J.G., Kim Y.D., Kim W.S., Francis L., Amy G., Ghaffour N. Performance modeling of direct contact membrane distillation (DCMD) seawater desalination process using a commercial composite membrane. J. Membr. Sci. 2015;478:85–95. doi: 10.1016/j.memsci.2014.12.053. [ DOI ] [ Google Scholar ] 36. Mostafa M.G., Zhu B., Cran M., Dow N., Milne N., Desai D., Duke M. Membrane Distillation of Meat Industry Effluent with Hydrophilic Polyurethane Coated Polytetrafluoroethylene Membranes. Membranes. 2017;7:55. doi: 10.3390/membranes7040055. [ DOI ] [ PMC free article ] [ PubMed ] [ Google Scholar ] 37. Garcia J.V., Dow N., Milne N., Zhang J., Naidoo L., Gray S., Duke M. Membrane Distillation Trial on Textile Wastewater Containing Surfectants Using Hydrophobic and Hydrophilic-Coated Polytetrafluoroethylene (PTFE) Membranes. Membranes. 2018;8:31. doi: 10.3390/membranes8020031. [ DOI ] [ PMC free article ] [ PubMed ] [ Google Scholar ] 38. Zhang J., Li J.D., Gray S. Effect of applied pressure on performance of PTFE membrane in DCMD. J. Membr. Sci. 2011;369:514–525. doi: 10.1016/j.memsci.2010.12.033. [ DOI ] [ Google Scholar ] 39. Ghaleni M.M., Bavarian M., Nejati S. Model-guided design of high-performance membrane distillation modules for water desalination. J. Membr. Sci. 2018;563:794–803. doi: 10.1016/j.memsci.2018.06.054. [ DOI ] [ Google Scholar ] 40. Wang K.Y., Chung T.S. Polybenzimidazole Nanofiltration Hollow Fiber for Cephalexin Separation. AIChE J. 2006;52:1363–1377. doi: 10.1002/aic.10741. [ DOI ] [ Google Scholar ] 41. Huang F.Y.C., Reprogle R. Thermal Conductivity of Polyvinylidene Fluoride Membranes for Direct Contact Membrane Distillation. Environ. Eng. Sci. 2018 doi: 10.1089/ees.2018.0349. [ DOI ] [ Google Scholar ] 42. Pakomania. [(accessed on 11 March 2019)]; Available online: http://www.packomania.com . 43. Reid R.C., Prausnitz J
The paper trail · every fact has a biography
Challenge the receipt
Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.
Terms · Privacy · How verdicts work · Dispute this receipt