Microstructure and Performance of a Porous Polymer Membrane with a Copper Nano-Layer Using Vapor-Induced Phase Separation Combined with Magnetron Sputtering

Abstract

Antibacterial metalized poly(vinylidene fluoride) (PVDF) porous membranes with a nano-layer were obtained via the method of vapor-induced phase separation combined with magnetron sputtering of copper. Magnetron sputtering has such advantages as high deposition rates, low substrate temperatures, and good adhesion of films on substrates. The influence brought by deposition time on the microstructure, hydrophobic property, copper distribution state, anti-biofouling, and permeation separation performance was investigated via atomic force microscopy (AFM), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX) spectrometry, contact angle measurements, and capillary flow porometry, along with the porosity, water flux, protein solution flux, rejection rate, water flux recovery rate, and antibacterial property. The results showed that copper particles formed island-type deposits on the membrane surface and were embedded into cross-section pores near the surface owning to the interconnection of pores. Subsequently, the water flux and protein solution flux declined, but the rejection rate and water flux recovery rate increased. Meanwhile, Cu-coated PVDF membranes exhibited an excellent antibacterial ability.

Kajian Membran Nilon Sebagai Filter Pada Proses Penjernihan Nira Tebu

“…Pengukuran fluks aquadest dilakukan sebagai kontrol untuk menunjukkan karakteristik membran yang digunakan serta sebagai pembanding dengan larutan uji yang digunakan (nira tebu). Nilai fluks dapat diperoleh menggunakan persamaan (1) [14].…”

Pengaruh Dosis Implantasi Ion Nitrogen Pada Sifat Kapasitasi Polimer PVDF Dan PVDF-HFP

“…Bahan utama yang digunakan dalam penelitian ini adalah polimer PVDF dan PVDF-HFP dengan pelarut aceton, dan gas nitrogen sebagai bahan ion yang diimplankan. Bahan PVDF dipilih karena memiliki sifat feroelektrik dengan kekuatan dielektrik besar, memiliki daya tahan terhadap pelarut, asam, dan panas [12][13][14][15]. Dengan sifat feroelektriknya tersebut, menjadikan PVDF memiliki nilai konstanta dielektrik ε lebih tinggi bila dibandingkan jenis polimer lainnya.…”

“…Implantasi ion nitrogen dapat mengubah ikatan polimer dari bahan PVDF dan PVDF-HFP dan juga dapat berfungsi sebagai filler pada matrik polimer. Selain itu bahan PVDF dipilih karena memiliki sifat feroelektrik dengan kekuatan dielektrik besar, memiliki daya tahan terhadap pelarut, asam, dan panas [12][13][14][15]. Banyaknya dosis ion nitrogen akan sangat mempengaruhi perubahan ikatan polimer sehingga perlu dilakukan variasi dosis ion nitrogen.…”

Application of Membran Polyvinylidenefluoride (PVDF) Synthesis Blending TiO<sub>2</sub>-Serbuk Kelor (Moringa Oleifera) Seed on Coal Wastewater Treatment

“…This membrane is made of polymer materials like Cellulose Acetate (CA) and polysulfone (PSF) combined with organic matters such as Alumina and Titanium dioxide. Technology of polyninylidene fluoride (PVDF) membrane is one of the best membranes to be applied in UF systemsince the activity of PVDF membrane has antioxidant, high durability both in term of chemical and thermal stability, highly organic selectivity, and has good mechanical and membrane formation properties [16][17][18][19][20]. However, the disadvantage of this PVDF membrane includes its membrane surface that has a tendency to be hydrophobic, thus filtration process that involves hydrophilic solution is lower than it should be [21].…”