کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
636821 | 883666 | 2010 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Layer-by-layer self-assembly of polyelectrolyte complexes and their multilayer films for pervaporation dehydration of isopropanol
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Layer-by-layer self-assembly of polyelectrolyte complexes and their multilayer films for pervaporation dehydration of isopropanol Layer-by-layer self-assembly of polyelectrolyte complexes and their multilayer films for pervaporation dehydration of isopropanol](/preview/png/636821.png)
چکیده انگلیسی
Two negatively charged polyelectrolyte complex colloidal nanoparticles (PECâ) and one positively charged nanoparticle (PEC+) were prepared and used as novel layer-by-layer (LbL) building blocks. These PEC nanoparticles include poly(2-methacryloyloxy ethyl trimethylammonium chloride)/sodium carboxymethyl cellulose (PDMC/CMCNa PECâ), poly(diallyldimethylammonium chloride)/CMCNa (PDDA/CMCNa PECâ) and PDDA/poly(sodium-p-styrenesulfonate) (PDDA/PSS PEC+). LbL multilayer films based on (PEC+/PECâ) were constructed on both quartz slides and modified polyamide (MPA) reverse osmosis support membranes. UV-vis spectroscopy, quartz crystal microbalance (QCM), field emission scanning microscopy (FESEM) and atomic force microscopy (AFM) were utilized to follow the thickness growth and morphology evolution of these multilayer films with increasing bi-layer numbers. LbL multilayer films deposited on MPA support membranes were subjected to pervaporation dehydration of 10 wt% water-isopropanol and effect of bi-layer numbers and feed temperature on pervaporation performance was studied. Generally, PEC+/PECâ can be LbL self-assembled successfully on both substrates with a thickness growth rate ca. 200 nm/bi-layer. Moreover, PEC+/PECâ multilayer films show high pervaporation performance with film thickness up to several micrometers. For example, performance of the multilayer films in dehydrating 10 wt% water-isopropanol at 50 °C is J = 1.18 kg/m2 h, α = 1013 for (PEC+/PDMC-CMCNa PECâ)24 and J = 1.36 kg/m2 h, α = 938 for (PEC+/PDMC-CMCNa PECâ)25, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 346, Issue 2, 15 January 2010, Pages 335-343
Journal: Journal of Membrane Science - Volume 346, Issue 2, 15 January 2010, Pages 335-343
نویسندگان
Qiang Zhao, Jinwen Qian, Quanfu An, Zhiwei Sun,