Preparation and properties of PEC nanocomposite membranes with carboxymethyl cellulose and modified silica.

Abstract

Carboxymethyl cellulose (CMC)-modified silica nanocomposites were prepared via in situ incorporation of modified silica during the ionic complexation between CMC and poly(2-methacryloyloxy ethyl trimethylammonium chloride) (PDMC). Ionic bonds were introduced between the poly(2-acrylamido-2-methylproanesulfonic acid) modified silica (SiO2-PAMPS) and the polyelectrolyte complex (PEC) matrix. The PEC nanocomposites (PECNs) and their membranes (PECNMs) were characterized with Fourier transform-infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and tensile testing. PECNM containing 5 wt.% SiO2-PAMPS showed a tensile strength of 68 MPa and elongation at break of 7.1%, which were 1.9 and 2.6 times as high as those of pristine PEC membranes, respectively. Moreover, the pervaporation performance of as-prepared PECNMs was evaluated with dehydration of 10 wt.% aqueous isopropanol mixtures, and the PECNMs exhibited a flux of 2,400 gm(-2)h(-1) with a high separation factor of 4491 at 70°C.

• Authors: Tao Liu, Quan-Fu An, Xue-San Wang, Qiang Zhao, Bao-Ku Zhu, Cong-Jie Gao
• Journal: Carbohydrate polymers (Carbohydr Polym) Vol. 106 Pg. 403-9 (Jun 15 2014) ISSN: 1879-1344 [Electronic] England
• PMID: 24721095 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2014 Elsevier Ltd. All rights reserved.

Chemical References

• Electrolytes
• Membranes, Artificial
• Methacrylates
• Polymers
• Solutions
• Sulfonic Acids
• poly(2-(trimethylamino)ethyl methacrylate)
• Water
• poly(2-acrylamido-2-methyl-1-propanesulfonic acid)
• Silicon Dioxide
• Carboxymethylcellulose Sodium
• 2-Propanol

Topics

• 2-Propanol (chemistry)
• Carboxymethylcellulose Sodium (chemistry)
• Desiccation
• Electrolytes (chemistry)
• Hydrophobic and Hydrophilic Interactions
• Materials Testing
• Membranes, Artificial
• Methacrylates (chemical synthesis, chemistry)
• Microscopy, Electron, Scanning
• Nanocomposites (chemistry)
• Polymers (chemistry)
• Silicon Dioxide
• Solutions
• Spectroscopy, Fourier Transform Infrared
• Static Electricity
• Sulfonic Acids (chemistry)
• Tensile Strength
• Thermogravimetry
• Water (chemistry)