Preparation and properties of PEC nanocomposite membranes with carboxymethyl cellulose and modified silica.
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.
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China.
Tao
T
Liu
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China. Electronic address: anqf@zju.edu.cn.
Quan-Fu
QF
An
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China.
Xue-San
XS
Wang
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China.
Qiang
Q
Zhao
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China.
Bao-Ku
BK
Zhu
Department of Chemical Engineering and Bioengineering, Zhejiang University, Hangzhou 310027, China; The Development Center of Water Treatment Technology, Hangzhou 310012, China.
Cong-Jie
CJ
Gao
D019840:2-Propanol / Q000737:chemistry; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D003890:Desiccation; D004573:Electrolytes / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008422:Materials Testing; D008567:Membranes, Artificial; D008689:Methacrylates / Q000138:chemical synthesis* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012822:Silicon Dioxide; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D055672:Static Electricity; D013451:Sulfonic Acids / Q000737:chemistry*; D013718:Tensile Strength; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry
D004573:Electrolytes; D008567:Membranes, Artificial; D008689:Methacrylates; D011108:Polymers; D012996:Solutions; D013451:Sulfonic Acids; C401965:poly(2-(trimethylamino)ethyl methacrylate); D014867:Water; C077118:poly(2-acrylamido-2-methyl-1-propanesulfonic acid); D012822:Silicon Dioxide; D002266:Carboxymethylcellulose Sodium; D019840:2-Propanol
Carboxymethyl cellulose; Nanocomposite membranes; Polyelectrolyte complex; Silica nanoparticles