Synthesis and Characterization of Novel Forward Osmosis Membranes based on Layer-by-Layer Assembly
作者： Qi Saren , Chang Quan Qiu , Chuyang Y. Tang
DOI: 10.1021/ES200115W
关键词: Materials science 、 Forward osmosis 、 Chemical engineering 、 Nanofiltration 、 Porosity 、 Polyelectrolyte 、 Membrane 、 Layer by layer 、 Permeability (electromagnetism) 、 Fouling 、 Nanotechnology
摘要: Forward osmosis (FO) has received considerable interest for water- and energy-related applications in recent years. FO does not require an applied pressure is believed to have a low fouling tendency. However, major challenge the lack of high performance membranes. In current work, novel nanofiltration (NF)-like membranes with good magnesium chloride retention were synthesized using layer-by-layer (LbL) assembly. The membrane substrate was tailored (high porosity, finger-like pores, thin cross-section, hydrophilicity) achieve small structural parameter 0.5 mm. Increasing number polyelectrolyte layers improved selectivity LbL while reducing their water permeability. more selective 6#LbL (with 6 layers) had much lower reverse solute transport compared 3#LbL 1#LbL. Meanwhile, flux found be strongly affected by both permeability transport. Severe solute...
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