The Structure and Performance of Sliver-Polyelectrolyte Composite Nanofiltration MembraneReport as inadecuate




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Multilayer polyelectrolyte films containing silver as anti-bacterial nanofiltration membranes were prepared by alternating adsorption of PAH-AgCl complex and polyelectrolyte followed by chemical reduction of AgCl with NaBH4. The PAH-AgCl complex was prepared by dissolving AgNO3 in PAH solution in an ultrasonic bath. SEM and UV-visible transmission spectra were used for film characterization. Silver particles are prepared successfully within the polyelectrolyte multilayer films. The particles are well distributed throughout the film and the particle sizes 10~20nm. The membrane PSS- PDADMAC3PAS-PAH-Ag3PSS gives a high rejection to negative divalent-ions, up to 93%. These membranes had an excellent anti-bacterial activity in water; the bacteria-killing efficiency achieved 99%.

KEYWORDS

composite nanofiltration membrane,sliver nano-particles,structure,performance

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Author: Zhi-yuan Cao, Jian-hui Fang, Xia Shen, Li-yi Shi

Source: http://www.scirp.org/



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